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WO2012070220A1 - Bloc-batterie pour véhicule de type à selle et véhicule de type à selle - Google Patents

Bloc-batterie pour véhicule de type à selle et véhicule de type à selle Download PDF

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Publication number
WO2012070220A1
WO2012070220A1 PCT/JP2011/006468 JP2011006468W WO2012070220A1 WO 2012070220 A1 WO2012070220 A1 WO 2012070220A1 JP 2011006468 W JP2011006468 W JP 2011006468W WO 2012070220 A1 WO2012070220 A1 WO 2012070220A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
battery unit
batteries
battery
see
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/006468
Other languages
English (en)
Inventor
Junji Terada
Yoshinori Shima
Hiroki Iida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to EP11796837.0A priority Critical patent/EP2643871A1/fr
Publication of WO2012070220A1 publication Critical patent/WO2012070220A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/512—Connection only in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack and a saddle type vehicle, and more specifically to a battery pack having a plurality of rechargeable batteries, and a saddle type vehicle including it.
  • the battery back disclosed in Patent Literature 1 includes an outer case.
  • the outer case houses a battery assembly.
  • the battery assembly includes a plurality of batteries connected by lead plates. Heat releasing plates are fixed to surfaces of the lead plates. With this, elastic, heat-conductive sheets are laminated between the outer case and the heat releasing plates, so that heat in the heat releasing plates is released from the outer case to the outside via the elastic heat-conductive sheets.
  • a primary object of the present invention is to provide a battery pack for saddle type vehicles, having an increased amount of energy but is efficient in heat releasing yet does not require a large two-dimensional space for disposing a plurality of batteries. Another object is to provide a saddle type vehicle including the battery pack.
  • a battery pack for a saddle type vehicle which includes a case having a first storage portion and a second storage portion formed with a space therebetween, and a coupling portion connecting the first storage portion and the second storage portion with each other; a first battery unit having a plurality of rechargeable batteries disposed in parallel with each other and housed inside the first storage portion; a second battery unit having a plurality of rechargeable batteries disposed in parallel with each other and housed inside the second storage portion; and a connecting portion electrically connecting the plurality of batteries in the first battery unit with the plurality of batteries in the second battery unit.
  • the first battery unit is housed in the first storage portion and the second battery unit is housed in the second storage portion of the case, and the batteries in the first battery unit and the batteries in the second battery unit are electrically connected by the connecting portion. Since the battery pack has the first battery unit and the second battery unit which are electrically connected to each other by the connecting portion, the battery pack can have a large energy capacity. Nevertheless, since the first battery unit and the second battery unit are disposed with the space in between, the battery pack does not require a large two-dimensional space for disposing the batteries. Further, since heat generated by the first battery unit and the second battery unit can also be efficiently released from the space, the battery pack can have a high heat releasing ability.
  • the case includes a first case portion located on an outer side of the first battery unit; a second case portion located between the first battery unit and the space and assembled with the first case portion; a third case portion located between the space and the second battery unit and assembled with the second case portion; and a fourth case portion located on an outer side of the second battery unit and assembled with the third case portion.
  • the first case portion and the second case portion provide the first storage portion; the second case portion and the third case portion provide the coupling portion; the third case portion and the fourth case portion provide the second storage portion; and the space is provided between the second case portion and the third case portion.
  • the case can be obtained easily.
  • the first case portion located on an outer side of the first battery unit means the first case portion which is located on a side away from the space as viewed from the first battery unit. Therefore, the first battery unit is between the space and the first case portion.
  • the fourth case portion located on an outer side of the second battery unit means the fourth case portion which is located on a side away from the space as viewed from the second battery unit. Therefore, the second battery unit is between the space and the fourth case portion.
  • the connecting portion is housed inside the case.
  • the case is provided, for example, with a guide portion (e.g. a hole which penetrates the case) arranged to guide the connecting portion to the outside of the case.
  • the guide portion decreases sealing in the case, so it is desirable to provide the guide portion with some means for increased sealing (e.g. water-tight seal) of the case.
  • the connecting portion is housed inside the case, there is no need for providing a guide portion for guiding the connecting portion to the outside of the case. Therefore, there is no need for arrangements to improve sealing as mentioned above, and it becomes possible to easily increase the sealing of the case.
  • the connecting portion passes through the coupling portion, and at least part of the coupling portion overlaps with the first battery unit when the first battery unit is viewed from the second storage portion whereas at least part of the coupling portion overlaps with the second battery unit when the second battery unit is viewed from the first storage portion.
  • the arrangement reduces two-dimensional size of the case, so the battery pack can be made compact.
  • the coupling portion serves for connecting the first storage portion and the second storage portion, and also for guiding the connecting portion from the first storage portion to the second storage portion. Therefore, it is not necessary to provide arrangements to guide the connecting portion from the first storage portion to the second storage portion separately from the coupling portion. As a result, the invention makes it possible to simplify the construction of the battery pack.
  • each of the batteries is substantially cylindrical; each battery has a greater dimension in its axial direction than a diameter thereof; and the batteries are disposed in such a fashion that the batteries, even if not all, have their one of end surfaces oriented to the space. In this case, it is possible to release heat which is generated by the batteries to the space efficiently. Also, the arrangement requires a smaller two-dimensional space for disposing the batteries than in cases where each battery is disposed in such a fashion that its outer circumferential surface is oriented to the space. As a result of these, it becomes possible to obtain a battery pack which is compact and has an increased heat releasing ability.
  • the expression that "the batteries are disposed in such a fashion that they have their one of end surfaces oriented to the space” means that those batteries are disposed in such a fashion that a straight line which extends in parallel to the battery's axis and passes through the end surface will pass through the space.
  • the space is a space outside of the case. In this case, it becomes possible to further improve the heat releasing ability of the battery pack.
  • first battery unit and the second battery unit are connected electrically in parallel. In this case, it becomes possible to increase the battery pack's energy capacity sufficiently by connecting the first battery unit and the second battery unit electrically in parallel.
  • the first battery unit and the second battery unit are connected electrically in series. In this case, it becomes possible to increase the battery pack's output voltage.
  • the battery pack further includes a controller arranged to control the first battery unit and the second battery unit.
  • a controller arranged to control the first battery unit and the second battery unit.
  • one controller controls the first battery unit and the second battery unit, so the control system of the battery pack can have a simple configuration.
  • Saddle type vehicles which use battery packs mounted onboard require that the battery packs should supply a large amount of energy yet the vehicles have limited space for disposing their components, so the space for installing the battery packs is limited.
  • the battery pack described above can have a large energy capacity yet requires a small two-dimensional space for disposing the batteries. Therefore, the battery pack can be suitably applied to saddle type vehicles.
  • Fig. 1 is a front perspective view of a battery pack according to an embodiment of the present invention.
  • Fig. 2 is a front perspective view of a battery unit which is to be placed in a case of the battery pack.
  • Fig. 3 is a rear perspective view of the battery unit placed in the case of the battery pack.
  • Fig. 4 is an exploded perspective view of the battery pack in Fig. 1.
  • Fig. 5 is an illustrative plan view of the battery pack.
  • Fig. 6 is an illustrative front view of the battery pack.
  • Fig. 7 is an exploded perspective view of a first battery unit.
  • Fig. 8 is an illustrative side view of the battery pack.
  • Fig. 9 is an exploded perspective view of a second battery unit.
  • Fig. 1 is a front perspective view of a battery pack according to an embodiment of the present invention.
  • Fig. 2 is a front perspective view of a battery unit which is to be placed in a case of the battery
  • FIG. 10 is a circuit diagram showing an electric circuit in the battery unit.
  • Fig. 11 is a rear view of a coupling unit.
  • Fig. 12 is a sectional view of the coupling unit.
  • Fig. 13 is a perspective view of a battery pack according to another embodiment of the present invention.
  • Fig. 14 is a front perspective view of another example of the battery unit.
  • Fig. 15 is a rear perspective view of the said another example of the battery unit.
  • Fig. 16 is an exploded perspective view of the battery pack according to the said another embodiment.
  • Fig. 17 is an illustrative front view of the battery pack according to the said another embodiment.
  • Fig. 18 is an illustrative plan view of the battery pack according to the said another embodiment.
  • Fig. 11 is a rear view of a coupling unit.
  • Fig. 12 is a sectional view of the coupling unit.
  • Fig. 13 is a perspective view of a battery pack according to another embodiment of the present
  • Fig. 19 is an illustrative bottom view of the battery pack according to the said another embodiment.
  • Fig. 20 is an exploded perspective view of another example of the second battery unit.
  • Fig. 21 is an illustrative side view of the battery pack according to the said another embodiment.
  • Fig. 22 is a circuit diagram showing an electric circuit in the battery unit.
  • Fig. 23 is a perspective view of a battery pack according to still another embodiment of the present invention.
  • Fig. 24 is an exploded perspective view of the battery pack according to the said still another embodiment.
  • Fig. 25 is a perspective view showing an internal structure of the battery pack according to the said still another embodiment.
  • Fig. 26 is an enlarged perspective view of a second case portion and a third case portion.
  • Fig. 27 is a side view of an electric motorcycle.
  • Fig. 1 is a front perspective view of a battery pack 10 according to an embodiment of the present invention. It should be noted here that for clear identification of positional relationship between constituent elements in the battery pack 10, Fig. 1 includes arrows for indication of fore-aft directions and left-right directions. Other drawings may also include these arrows for indication of the fore-aft directions and the left-right directions as appropriately.
  • the battery pack 10 includes a box-like case 12.
  • the case 12 includes a first case portion 14, a second case portion 16, a third case portion 18 and a fourth case portion 20.
  • the first case portion 14, the second case portion 16, the third case portion 18 and the fourth case portion 20 are made of an insulating material such as a resin, for example.
  • Fig. 2 is a front perspective view of a battery unit 22 which is to be placed in the case 12.
  • Fig. 3 is a rear perspective view of the battery unit 22.
  • Fig. 4 is an exploded perspective view of the battery pack 10.
  • the battery unit 22 (see Fig. 2 and Fig. 3) includes a first battery unit 24 and a second battery unit 26.
  • a coupling unit 28 connects a rear end portion of the first battery unit 24 and a rear end portion of the second battery unit 26 with each other. In Fig. 4, the coupling unit 28 is shown as connected to the first battery unit 24.
  • the first battery unit 24 is disposed between the first case portion 14 and the second case portion 16 whereas the second battery unit 26 is disposed between the third case portion 18 and the fourth case portion 20.
  • Fig. 5 is an illustrative plan view of the battery pack 10.
  • Fig. 5 shows a section of the case 12 when the case 12 is cut in its center region in terms of the up-down direction.
  • Fig. 6 is an illustrative front view of the battery pack 10.
  • Fig. 6 shows a section of the case 12 when the case 12 is cut in lines A-A in Fig. 5. It should be noted here that in Fig. 5 and Fig. 6, the battery unit 22 is drawn in a simplified fashion in order to avoid complication in the drawing.
  • the first case portion 14 includes a support portion 30 and a heat releasing portion 32 protruding leftward from the support portion 30.
  • the support portion 30 includes a frame portion 34 to allow formation of a rectangular or substantially rectangular opening 34a (see Fig. 6) in its right end portion.
  • the support portion 30 further includes a side wall portion 36 provided on the left side of an upper end portion of the frame portion 34; and a side wall portion 38 provided on the left side of a lower end portion of the frame portion 34.
  • the side wall portion 36 and the side wall portion 38 are vertical or substantially vertical with respect to the frame portion 34.
  • the side wall portion 36 has a pair of bosses 36a extending rightward.
  • Each boss 36a is hollow cylindrical or hollow and substantially cylindrical.
  • One of the bosses 36a is at a front end portion of the side wall portion 36 while the other boss 36a is at a rear end portion of the side wall portion 36.
  • the side wall portion 38 has a pair of bosses 38a extending rightward.
  • One of the bosses 38a is at a front end portion of the side wall portion 38 while the other boss 38a is at a rear end portion of the side wall portion 38.
  • the heat releasing portion 32 includes a platy upper wall portion 40a (see Fig. 1 and Fig. 6) extending leftward from a lower end portion of the side wall portion 36; a platy lower wall portion 40b (see Fig. 1 and Fig. 6) extending leftward from an upper end portion of the side wall portion 38; a platy front wall portion 40c (see Fig. 1 and Fig. 5) extending leftward from the frame portion 34 to connect a front end portion of the upper wall portion 40a with a front end portion of the lower wall portion 40b; and a platy rear wall portion 40d (see Fig. 1 and Fig.
  • the heat releasing portion 32 further includes a platy side wall portion 42 which continues from a left edge of the upper wall portion 40a, a left edge of the lower wall portion 40b, a left edge of the front wall portion 40c, and a left edge of the rear wall portion 40d.
  • the side wall portion 42 has a plurality (seven in this embodiment) of through-holes 42a provided in line in the up-down direction.
  • the second case portion 16 includes a frame portion 44 which is rectangular in a side view or substantially rectangular in a side view; a frame portion 46 which is rectangular in a side view or substantially rectangular in a side view and extends rightward from a front end portion of the frame portion 44; and a frame portion 48 which is rectangular in a side view or substantially rectangular in a side view and extends rightward from a rear end portion of the frame portion 46.
  • the frame portion 46 and the frame portion 48 are spaced from each other in the fore-aft direction, and are parallel or substantially parallel to each other.
  • Fig. 1 shows a border between the frame portion 44 and the frame portion 46, and a border between the frame portion 44 and the frame portion 48, indicated by alternate long and short dash lines.
  • the second case portion 16 further includes a rectangular platy portion 50 connecting the frame portion 46 and the frame portion 48 at a right end portion of the frame portion 44.
  • the platy portion 50 has an upper end portion and a lower end portion connected to the frame portion 44.
  • the frame portion 46 and the frame portion 48 protrude rightward beyond the platy portion 50.
  • the platy portion 50 has a plurality (six in this embodiment) of through-holes 50a provided in line in the up-down direction.
  • the frame portion 44 provides a rectangular parallelepiped or substantially rectangular parallelepiped opening 44a; the frame portion 46 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 46a penetrating in the left-right direction; and the frame portion 48 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 48a penetrating in the left-right direction.
  • the through-hole 46a and the through-hole 48a communicate with the opening 44a.
  • a groove portion 44b is formed along a left edge of the frame portion 44.
  • the groove portion 44b opens leftward.
  • Fig. 4 does not show the groove portion 44b.
  • an annular water-tight seal 52 is fitted into the groove portion 44b (see Fig. 5 and Fig. 6). Under this state, the frame portion 34 of the first case portion 14 is fitted into the groove portion 44b (see Fig. 5 and Fig. 6). Thus the first case portion 14 and the second case portion 16 are connected with each other. The first case portion 14 and the second case portion 16 are further fixed to each other by a plurality of fasteners (not illustrated) such as screws.
  • the water-tight seal 52 prevents water from entering from outside of the case 12 into the case 12 from between the first case portion 14 and the second case portion 16.
  • the third case portion 18 includes frame portions 54, 56 spaced from each other in the fore-aft direction in parallel or substantially parallel to each other; and a platy portion 58 connecting the frame portion 54 and the frame portion 56 with each other.
  • the frame portion 54, the frame portion 56 and the platy portion 58 are rectangular or substantially rectangular in a side view respectively.
  • the platy portion 58 has a plurality (six in this embodiment) of through-holes 58a provided in line in the up-down direction.
  • the frame portion 54 and the frame portion 56 protrude leftward beyond the platy portion 58.
  • the third case portion 18 further includes a protruding portion 60 provided along its outer circumferential edge to protrude rightward from the frame portion 54, the frame portion 56 (see Fig. 4 and Fig. 6) and the platy portion 58 (see Fig. 4 and Fig. 5).
  • the frame portion 54 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 54a penetrating in the left-right direction
  • the frame portion 56 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 56a penetrating in the left-right direction.
  • a groove portion 54b is formed along a left edge of the frame portion 54 whereas a groove portion 56b is formed along a left edge of the frame portion 56.
  • the groove portion 54b and the groove portion 56b open leftward.
  • Fig. 4 does not show the groove portion 54b or the groove portion 56b.
  • an annular water-tight seal 62 is fitted into the groove portion 54b (see Fig. 5). Under this state, the frame portion 46 of the second case portion 16 is fitted into the groove portion 54b (see Fig. 5). Likewise, an annular water-tight seal 64 is fitted into the groove portion 56b (see Fig. 5). Under this state, the frame portion 48 of the second case portion 16 is fitted into the groove portion 56b (see Fig. 5). Thus, the frame portion 46 and the frame portion 54 are connected with each other, and the frame portion 48 and the frame portion 56 are connected with each other. Specifically, the second case portion 16 and the third case portion 18 are connected with each other.
  • the second case portion 16 and the third case portion 18 are further fixed to each other by a plurality of fasteners (not illustrated) such as screws.
  • the water-tight seal 62 and the water-tight seal 64 prevent water from entering from outside of the case 12 into the case 12 from between the second case portion 16 and the third case portion 18.
  • the fourth case portion 20 includes a support portion 66; and a heat releasing portion 68 (see Fig. 4 through Fig. 6) protruding rightward from the support portion 66.
  • the support portion 66 includes a frame portion 70, to allow formation of a rectangular parallelepiped or substantially rectangular parallelepiped opening 70a.
  • a service plug 148 to be described later is provided detachably/attachably in a front surface of the frame portion 70.
  • the support portion 66 further includes a side wall portion 72 (see Fig. 6) provided on the right side of an upper end portion of the frame portion 70; and a side wall portion 74 provided on the right side of a lower end portion of the frame portion 70.
  • the side wall portion 72 and the side wall portion 74 are vertical or substantially vertical with respect to the frame portion 70.
  • the side wall portion 72 has a dimension in the fore-aft direction, which is substantially equal to a dimension in the fore-aft direction of the side wall portion 36 in the first case portion 14.
  • the side wall portion 74 has a dimension in the fore-aft direction, which is substantially equal to a dimension in the fore-aft direction of the side wall portion 38 in the first case portion 14.
  • the side wall portion 72 has a pair of bosses 72a extending leftward.
  • Each boss 72a is hollow cylindrical or hollow and substantially cylindrical.
  • One of the bosses 72a is at a front end portion of the side wall portion 72 (see Fig. 6) to oppose to the boss 36a, which is provided in the front end portion of the side wall portion 36, in the left-right direction.
  • the other boss 72a is at a rear end portion of the side wall portion 72 (see Fig. 6) to oppose to the boss 36a, which is provided in the rear end portion of the side wall portion 36, in the left-right direction.
  • the side wall portion 74 has a pair of bosses 74a extending leftward.
  • Each boss 74a is hollow cylindrical or hollow and substantially cylindrical.
  • One of the bosses 74a is at a front end portion of the side wall portion 74 to oppose to the boss 38a, which is provided in the front end portion of the side wall portion 38, in the left-right direction.
  • the other boss 74a is at a rear end portion of the side wall portion 74 to oppose to the boss 38a, which is provided in the rear end portion of the side wall portion 38, in the left-right direction.
  • the support portion 66 further includes a side wall portion 76 extending in the up-down direction, connecting the front end portion of the side wall portion 72 (see Fig. 6) with the front end portion of the side wall portion 74 (see Fig. 6).
  • the side wall portion 76 has its front end portion connected to the frame portion 70.
  • the side wall portion 76 has two through-holes (not illustrated) for a positive terminal 124 and a negative terminal 144, to be described later, to protrude from inside of the case 12 to outside of the case 12. Also, as shown in Fig. 1, the side wall portion 76 (see Fig.
  • the protective portion 76a is provided integrally with the side wall portion 76 to enclose an outer circumferential surface of the positive terminal 124 whereas the protective portion 76b is provided integrally with the side wall portion 76 to enclose an outer circumferential surface of the negative terminal 144.
  • the heat releasing portion 68 includes a platy upper wall portion 78a (see Fig. 6) extending rightward from a lower end portion of the side wall portion 72 (see Fig. 6); a platy lower wall portion 78b (see Fig. 4 and Fig. 6) extending rightward from an upper end portion of the side wall portion 74 (see Fig. 4 and Fig. 6); a front wall portion 78c (see Fig. 5) extending rightward from a rear end portion of the side wall portion 76 (see Fig. 5) to connect a front end portion of the upper wall portion 78a (see Fig. 6) with a front end portion of the lower wall portion 78b (see Fig.
  • the heat releasing portion 68 further includes a platy side wall portion 80 provided continuously in a right edge of the upper wall portion 78a (see Fig. 6), a right edge of the lower wall portion 78b (see Fig. 4 and Fig. 6), a right edge of the front wall portion 78c (see Fig. 5), and a right edge of the rear wall portion 78d (see Fig. 4 and Fig. 5).
  • the side wall portion 80 has a plurality (seven in this embodiment) of through-holes 80a provided in line in the up-down direction.
  • a groove portion 70b is formed along a left edge of the frame portion 70.
  • the groove portion 70b opens leftward.
  • Fig. 4 does not show the groove portion 70b.
  • an annular water-tight seal 82 is fitted into the groove portion 70b (see Fig. 5 and Fig. 6). Under this state, the protruding portion 60 of the third case portion 18 is fitted into the groove portion 70b (see Fig. 5 and Fig. 6). Thus the third case portion 18 and the fourth case portion 20 are connected with each other. The third case portion 18 and the fourth case portion 20 are further fixed to each other by a plurality of fasteners (not illustrated) such as screws.
  • the water-tight seal 82 prevents water from entering from outside of the case 12 into the case 12 from between the third case portion 18 and the fourth case portion 20.
  • the second case portion 16 and the third case portion 18 provide a space 84 penetrating the case 12 in the up-down direction at a center region or a substantially center region in the case 12.
  • the space 84 serves as a heat releasing space for releasing heat generated by the first battery unit 24 and the second battery unit 26.
  • the space 84 will be called the heat releasing space 84.
  • the heat releasing space 84 is provided as a through-hole.
  • the heat releasing space 84 is a space outside of the case 12.
  • the first case portion 14, the frame portion 44 of the second case portion 16 and the platy portion 50 of the second case portion 16 constitute a first storage portion X1;
  • the platy portion 58 of the third case portion 18, the protruding portion 60 of the third case portion 18 and the fourth case portion 20 constitute a second storage portion X2;
  • the frame portion 46 of the second case portion 16, the frame portion 48 of the second case portion 16, the frame portion 54 of the third case portion 18 and the frame portion 56 of the third case portion 18 constitute a coupling portion X3.
  • the heat releasing space 84 is provided between the first storage portion X1 and the second storage portion X2.
  • the first storage portion X1 has a first storage space 86 for storing the first battery unit 24 whereas the second storage portion X2 has a second storage space 88 for storing the second battery unit 26.
  • the first storage space 86 and the second storage space 88 communicate with each other via the through-holes 46a, 48a, 54a and 56a of the coupling portion X3.
  • Fig. 7 is an exploded perspective view of the first battery unit 24 in the battery unit 22 (see Fig. 2 and Fig. 3).
  • Fig. 8 is an illustrative side view when inside of the battery pack 10 is viewed from the left side. Note that Fig. 8 does not show the first case portion 14 (see Fig. 4), the second case portion 16 (see Fig. 4), the water-tight seal 52 (see Fig. 4), the water-tight seal 62 (see Fig. 4) or the water-tight seal 64 (see Fig. 4) in order to give easier understanding about the internal structure of the battery pack 10.
  • the first battery unit 24 includes a plurality of rechargeable batteries 90 disposed in parallel to each other; a battery holder 92; a battery holder 94 (see Fig. 7) and a controller 96.
  • Each battery 90 has a terminal electrode 90a as a positive electrode and a terminal electrode 90b as a negative electrode.
  • Each battery 90 is columnar or substantially columnar.
  • a longitudinal dimension of the battery 90 is greater than a diameter of the battery 90.
  • the batteries 90 are arranged in a plurality of rows in a plurality of tiers so that their terminal electrodes 90a and terminal electrodes 90b are on same planes. In this embodiment, the batteries 90 are arranged so that six batteries make a row in the fore-aft direction, and these rows of batteries are stacked in fourteen tiers in the up-down direction.
  • the battery 90 in one of the tiers is between two batteries 90 in the other tier in the fore-aft direction (except for the first battery 90 or the last battery 90 in each row of the batteries 90).
  • the batteries 90 are disposed in a staggered pattern.
  • any two batteries 90 which are adjacent to each other in the up-down direction are oriented in opposed directions to each other.
  • Any two batteries 90 which are adjacent to each other in the fore-aft direction are oriented in the same direction as each other.
  • the batteries 90 are arranged so that their terminal electrodes 90a (positive electrodes) are oriented to the left whereas the batteries 90 in the second, fourth, sixth, eighth, tenth, twelfth and fourteenth tiers from the top are arranged with their terminal electrodes 90b (negative electrodes) oriented to the left.
  • the battery holder 92 includes a rectangular or substantially rectangular platy portion 92a; a holder portion 92b protruding leftward from the platy portion 92a; a plurality (two in this embodiment) of bosses 92c extending forward from the holder portion 92b; and a plurality (seven in this embodiment) of bosses 92d (see Fig. 7) extending rearward from the holder portion 92b.
  • the bosses 92d are provided correspondingly to a plurality of lead members 100 to be described later.
  • the battery holder 92 has a plurality of through-holes 92e penetrating the platy portion 92a and the holder portion 92b in the left-right direction.
  • the through-holes 92e are formed correspondingly to the batteries 90.
  • the platy portion 92a has its four corners each provided with a cylindrical or substantially cylindrical boss 92f (Fig. 7 shows only three bosses 92f) extending in the left-right direction.
  • the holder portion 92b has a left end surface formed with a plurality (seven in this embodiment) of screw holes 92g in line in the up-down direction.
  • the battery holder 94 includes a rectangular platy portion 94a; a holder portion 94b protruding rightward from the platy portion 94a; a plurality (two in this embodiment) of bosses 94c extending forward from the holder portion 94b; and a plurality (eight in this embodiment) of bosses 94d (Fig. 7 shows only one boss 94d) extending rearward from the holder portion 94b.
  • the bosses 94d (Fig. 8 shows six of the bosses 94d) are provided correspondingly to a lead member 102a, a plurality of lead members 102b and a lead member 102c to be described later.
  • the battery holder 94 has a plurality of through-holes 94e penetrating the platy portion 94a and the holder portion 94b in the left-right direction.
  • the through-holes 94e are formed correspondingly to the batteries 90.
  • the holder portion 94b has its right end surface formed with a plurality of screw holes (not illustrated) like the screw holes 92g in the holder portion 92b.
  • the battery holder 92 and the battery holder 94 are assembled with each other so that the batteries 90 are housed in the through-holes 92e (see Fig. 7) and the through-holes 94e (see Fig. 7).
  • the battery holder 92 and the battery holder 94 are assembled with each other with a plurality of unillustrated fasteners (screws for example) by fixing the platy portion 92a and the platy portion 94a (see Fig. 3 and Fig. 7) to each other for example.
  • the controller 96 includes a rectangular circuit substrate 96a, a CPU (not illustrated) mounted on the circuit substrate 96a, and a memory (not illustrated) mounted on the circuit substrate 96a.
  • the controller 96 detects temperatures, currents, voltages, frequency of use and so on of the batteries 90, thereby monitors the batteries 90 and controls the batteries 90 as well.
  • the controller 96 may be provided by a BMC (Battery Management Controller) for example.
  • the circuit substrate 96a is attached to the bosses 92c of the battery holder 92 and the bosses 94c (see Fig. 7) of the battery holder 94 (see Fig. 7), with a plurality (four in this embodiment) of screws 98 (see Fig. 2 and Fig. 8).
  • the controller 96 is fixed to the battery holder 92 and the battery holder 94.
  • a plurality (seven in this embodiment) of connecting-purpose lead members 100 are connected on a left end portion of the bunch of batteries 90.
  • one lead member 100 is connected to the terminal electrodes 90a (positive electrodes) of the batteries 90 in the first tier from the top and to the terminal electrodes 90b (negative electrodes) of the batteries 90 in the second tier.
  • This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the first tier, and electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the second tier.
  • this establishes electrically serial connection of the terminal electrodes 90a of the batteries 90 in the first tier to the terminal electrodes 90b of the batteries 90 in the second tier.
  • the lead member 100 is welded for example, to the terminal electrodes 90a and the terminal electrodes 90b.
  • the other six lead members 100 are connected to the batteries 90 in the third tier through the fourteenth tier.
  • one lead member 100 is used for two tiers of the batteries 90.
  • Each lead member 100 has a front end portion and a rear end portion bending rightward respectively.
  • Each lead member 100 has its center portion in terms of the fore-aft direction formed with a through-hole 100a.
  • Each lead member 100 has its rear end portion formed with a through-hole 100b (see Fig. 7). Referring to Fig. 2 and Fig. 8, each lead member 100 has its front end portion connected to the circuit substrate 96a of the controller 96.
  • the lead members 100 are provided by lead plates. The same applies to lead members 102a, 102b, 102c, 108a, 108b, 108c, 110, 112, 120, 128, 130, 140, 152, 154 and 156 to be described later.
  • an output-purpose lead member 102a on a right end portion of the bunch of batteries 90, an output-purpose lead member 102a, a plurality (six in this embodiment) of connecting-purpose lead members 102b, and an output-purpose lead member 102c are connected.
  • the lead member 102a is connected to the terminal electrodes 90b of the batteries 90 in the first tier from the top. This establishes electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the first tier.
  • the lead member 102a is welded for example, to the terminal electrodes 90b.
  • the lead member 102a has a front end portion and a rear end portion bending leftward respectively.
  • the lead member 102a has its rear end portion formed with a through-hole 102d. Referring to Fig. 2, the lead member 102a has its front end portion connected to the circuit substrate 96a of the controller 96.
  • one lead member 102b is connected to the terminal electrodes 90a of the batteries 90 in the second tier from the top, and to the terminal electrodes 90b of the batteries 90 in the third tier. This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the second tier, and electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the third tier. Also, this establishes electrically serial connection of the terminal electrodes 90a of the batteries 90 in the second tier to the terminal electrodes 90b of the batteries 90 in the third tier.
  • the lead member 102b is welded for example, to the terminal electrodes 90a and the terminal electrodes 90b.
  • each lead member 102b has a front end portion and a rear end portion bending leftward.
  • Each lead member 102b has its center portion in terms of the fore-aft direction formed with a through-hole 102e.
  • Each lead member 102b has its rear end portion formed with a through-hole 102f. Referring to Fig. 2, each lead member 102b has its front end portion connected to the circuit substrate 96a of the controller 96.
  • the lead member 102c is connected to the terminal electrodes 90a of the batteries 90 in the fourteenth tier from the top. This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the fourteenth tier.
  • the lead member 102c is welded for example, to the terminal electrodes 90a.
  • the lead member 102c has a front end portion and a rear end portion bending leftward.
  • the lead member 102c has its rear end portion formed with a through-hole 102g.
  • the lead member 102c has its front end portion connected to the circuit substrate 96a of the controller 96.
  • the batteries 90 in the first tier through the fourteenth tier are connected as described above, whereby the batteries 90 in each tier are connected electrically in parallel whereas the batteries 90 in the first tier through the fourteenth tier are connected electrically in series.
  • Fig. 9 is an exploded perspective view of the second battery unit 26.
  • the second battery unit 26 includes a plurality of batteries 90 disposed in parallel to each other, a battery holder 104 and a battery holder 106.
  • the batteries 90 are arranged in a plurality of rows in a plurality of tiers so that their terminal electrodes 90a and terminal electrodes 90b are on the same planes.
  • the batteries 90 are arranged so that six batteries make a row in the fore-aft direction and these rows of batteries are stacked in fourteen tiers in the up-down direction.
  • the battery 90 in one of the tiers is between two batteries 90 in the other tier in the fore-aft direction (except for the first battery 90 or the last battery 90 in each row of the batteries 90).
  • the batteries 90 are disposed in a staggered pattern.
  • any two batteries 90 which are adjacent to each other in the up-down direction are oriented in opposed directions to each other.
  • Any two batteries 90 which are adjacent to each other in the fore-aft direction are oriented in the same direction as each other.
  • the batteries 90 in the first, third, fifth, seventh, ninth, eleventh and thirteenth tiers from the top are arranged so that their terminal electrodes 90b (negative electrodes) are oriented to the left whereas the batteries 90 in the second, fourth, sixth, eighth, tenth, twelfth and fourteenth tiers from the top are arranged with their terminal electrodes 90a (positive electrodes) oriented to the left.
  • the batteries 90 (see Fig. 7) in the first battery unit 24 (see Fig. 7) and the batteries 90 (see Fig. 9) in the second battery unit 26 (see Fig. 9) are oriented in mutually opposed directions.
  • the plurality of batteries 90 are arranged in such a fashion that terminal electrodes 90a of the batteries 90 in the first battery unit 24 oppose to terminal electrodes 90a of the batteries 90 in the second battery unit 26 whereas terminal electrodes 90b of the batteries 90 in the first battery unit 24 oppose to terminal electrodes 90b of the batteries 90 in the second battery unit 26.
  • the battery holder 104 includes a rectangular or substantially rectangular platy portion 104a; a holder portion 104b protruding leftward from the platy portion 104a; a boss 104c extending forward from an upper end portion of the holder portion 104b; a boss 104d extending forward from a lower end portion of the holder portion 104b; and a plurality (eight in this embodiment) of bosses 104e (Fig. 9 shows only one boss 104e) extending rearward from the holder portion 104b.
  • the bosses 104e are provided correspondingly to a lead member 108a, a plurality of lead members 108b and a lead member 108c to be described later.
  • the battery holder 104 has a plurality of through-holes 104f penetrating the platy portion 104a and the holder portion 104b in the left-right direction.
  • the through-holes 104f are formed correspondingly to the batteries 90.
  • the platy portion 104a has its four corners each provided with a cylindrical or substantially cylindrical boss 104g (Fig. 9 shows only three bosses 104g) extending in the left-right direction.
  • the holder portion 104b has a left end surface formed with a plurality (six in this embodiment) of screw holes 104h in line in the up-down direction.
  • a mounting portion 104i protrudes forward.
  • a mounting portion 104j protrudes forward.
  • mounting portions 104k, 104l protrude forward.
  • terminal mounting portions 104m, 104n are provided.
  • the battery holder 106 includes a rectangular platy portion 106a, a holder portion 106b protruding rightward from the platy portion 106a and a plurality (seven in this embodiment) of bosses 106c (Fig. 9 shows only one boss 106c) extending rearward from the holder portion 106b.
  • the bosses 106c are provided correspondingly to a plurality of lead members 110 to be described later.
  • the battery holder 106 has a plurality of through-holes 106d penetrating the platy portion 106a and the holder portion 106b in the left-right direction.
  • the through-holes 106d are formed correspondingly to the batteries 90.
  • the holder portion 106b has its right end surface formed with a plurality of screw holes (not illustrated) like the screw holes 104h in the holder portion 104b.
  • the battery holder 104 and the battery holder 106 are assembled with each other so that the batteries 90 are housed in the through-holes 104f (see Fig. 9) and the through-holes 106d (see Fig. 9).
  • the battery holder 104 and the battery holder 106 are assembled with each other with a plurality of unillustrated fasteners (screws for example) by fixing the platy portion 104a and the platy portion 106a (see Fig. 3 and Fig. 9) to each other for example.
  • an output-purpose lead member 108a on a left end portion of the bunch of batteries 90, an output-purpose lead member 108a, a plurality (six in this embodiment) of connecting-purpose lead members 108b, and an output-purpose lead member 108c are connected.
  • the lead member 108a is connected to the terminal electrodes 90b (negative electrodes) of the batteries 90 in the first tier from the top. This establishes electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the first tier.
  • the lead member 108a is welded for example, to the terminal electrodes 90b.
  • the lead member 108a has a front end portion and a rear end portion bending rightward.
  • the lead member 108a has its front end portion formed with a through-hole 108d.
  • the lead member 108a has its rear end portion formed with a through-hole 108e.
  • One lead member 108b is connected to the terminal electrodes 90a (positive electrodes) of the batteries 90 in the second tier from the top, and to the terminal electrodes 90b of the batteries 90 in the third tier. This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the second tier, and electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the third tier. Also, this establishes electrically serial connection of the terminal electrodes 90a of the batteries 90 in the second tier to the terminal electrodes 90b of the batteries 90 in the third tier.
  • the lead member 108b is welded for example, to the terminal electrodes 90a and the terminal electrodes 90b.
  • the other five lead members 108b are connected to the batteries 90 in the fourth tier through the thirteenth tier.
  • one lead member 108b is used for two tiers of the batteries 90.
  • Each lead member 108b has a rear end portion bending rightward.
  • Each lead member 108b has its center portion in terms of the fore-aft direction formed with a through-hole 108f.
  • Each lead member 108b has its rear end portion formed with a through-hole 108g.
  • the lead member 108c is connected to the terminal electrodes 90a of the batteries 90 in the fourteenth tier from the top. This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the fourteenth tier.
  • the lead member 108c is welded for example, to the terminal electrodes 90a.
  • the lead member 108c has its front end portion hooked rightward, with a tip of the hook extending upward.
  • the lead member 108c has a rear end portion bending rightward.
  • the lead member 108c has its front end portion formed with a through-hole 108h and a through-hole 108i.
  • the lead member 108c has its rear end portion formed with a through-hole 108j.
  • a plurality (seven in this embodiment) of connecting-purpose lead members 110 are connected on a right end portion of the bunch of batteries 90.
  • one lead member 110 is connected to the terminal electrodes 90a of the batteries 90 in the first tier from the top and to the terminal electrodes 90b of the batteries 90 in the second tier.
  • This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the first tier, and electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the second tier.
  • this establishes electrically serial connection of the terminal electrodes 90a of the batteries 90 in the first tier to the terminal electrodes 90b of the batteries 90 in the second tier.
  • the lead member 110 is welded for example, to the terminal electrodes 90a and the terminal electrodes 90b. In the same fashion, the other six lead members 110 are connected to the batteries 90 in the third tier through the fourteenth tier. Specifically, one lead member 110 is used for two tiers of the batteries 90. Each lead member 110 has a rear end portion bending leftward. Each lead member 110 has its center portion in terms of the fore-aft direction formed with a through-hole 110a. Each lead member 110 has its rear end portion formed with a through-hole 110b.
  • the batteries 90 in the first tier through the fourteenth tier are connected as described above, whereby the batteries 90 in each tier are connected electrically in parallel whereas the batteries 90 in the first tier through the fourteenth tier are connected electrically in series.
  • a lead member 112 formed in a shape of letter L or substantially in a shape of letter L in a plan view is provided to connect the front end portion of the lead member 102c and the front end portion of the lead member 108c with each other.
  • the lead member 112 has its left end portion welded, for example, to the front end portion of the lead member 102c.
  • the lead member 112 passes through the through-hole 46a and the through-hole 54a in the coupling portion X3, and extends from the first storage space 86 of the first storage portion X1 to the second storage space 88 of the second storage portion X2.
  • the lead member 112 has its right end portion fixed to the boss 104d of the battery holder 104 with a screw 114, together with the front end portion of the lead member 108c.
  • terminal electrodes 90a (see Fig. 7) of the batteries 90 in the fourteenth (lowermost) tier in the first battery unit 24 and terminal electrodes 90a (see Fig. 9) of the batteries 90 in the fourteenth (lowermost) tier in the second battery unit 26 are connected with each other by the lead member 112.
  • the lead member 108c has its right end portion fixed to the mounting portion 104l (see Fig. 6) in the battery holder 104 with a screw 118 together with a terminal 116a of a fuse 116.
  • the fuse 116 has another terminal 116b, which is fixed to the mounting portion 104k (see Fig. 6) in the battery holder 104 with a screw 122, together with a lower end portion of a lead member 120.
  • the lead member 120 has a zigzag shape like a staircase in a front view.
  • the lead member 120 has an upper end portion fixed to the mounting portion 104i in the battery holder 104 with a screw 126, together with the discharge-purpose positive terminal 124.
  • the batteries 90 in the first battery unit 24 and the batteries 90 in the second battery unit 26 are electrically connected to the positive terminal 124 via the fuse 116.
  • the positive terminal 124 extends rightward from the mounting portion 104i (see Fig. 6) to protrude out of the case 12 from the side wall portion 76 of the case 12.
  • the protective portion 76a see Fig. 1).
  • a lead member 128 formed in a shape of letter L or substantially in a shape of a letter L as viewed in a plan view is provided to connect the front end portion of the lead member 102a and the front end portion of the lead member 108a.
  • the lead member 128 has its left end portion welded, for example, to the front end portion of the lead member 102a.
  • the lead member 128 passes through the through-hole 46a and the through-hole 54a in the coupling portion X3, and extends from the first storage space 86 of the first storage portion X1 to the second storage space 88 of the second storage portion X2.
  • the lead member 128 has its right end portion fixed to the boss 104c (see Fig. 9) of the battery holder 104 with a screw 132, together with the front end portion of the lead member 108a and a rear end portion of a lead member 130 which is formed in a shape of letter L or substantially in a shape of a letter L (in a side view).
  • terminal electrodes 90b (see Fig. 7) of the batteries 90 in the first (uppermost) tier in the first battery unit 24 and terminal electrodes 90b (see Fig. 9) of the batteries 90 in the first (uppermost) tier in the second battery unit 26 are connected with each other by the lead member 128.
  • the lead member 112 and the lead member 128 establish electrically parallel connection between the batteries 90 in the first battery unit 24 and the batteries 90 in the second battery unit 26.
  • the lead member 130 has a front end portion extending to bend downward and then fixed to the mounting portion 104n in the battery holder 104 with a screw 136, together with a platy terminal 134.
  • the terminal 134 is opposed to a platy terminal 138, which is mounted to the mounting portion 104m with a screw 142, together with an upper end portion of a lead member 140.
  • the lead member 140 has a zigzag shape like a staircase in a front view.
  • the lead member 140 has a lower end portion mounted to the mounting portion 104j in the battery holder 104 with a screw 146, together with the charging-/discharging- purpose negative terminal 144.
  • the negative terminal 144 extends rightward from the mounting portion 104j (see Fig. 6) to protrude out of the case 12 (see Fig. 5) from the side wall portion 76 (see Fig. 5) of the case 12 (see Fig. 5).
  • the protective portion 76b see Fig. 1).
  • a service plug 148 is attached to the frame portion 70 of the fourth case portion 20.
  • the service plug 148 has a connecting terminal (not illustrated) protruding from the frame portion 70 into the case 12. This connecting terminal connects the terminal 134 (see Fig. 6) with the terminal 138 (see Fig. 6).
  • the batteries 90 in the first battery unit 24 and the batteries 90 in the second battery unit 26 are electrically connected to the negative terminal 144 via the service plug 148.
  • the service plug 148 is attachable to and detachable from the frame portion 70. Therefore, the service plug 148 can be detached from the frame portion 70 in order to cut the electrical connection between the terminal 134 (see Fig. 6) and the terminal 138 (see Fig. 6). This provides means for cutting electrical connection between the positive terminal 124 and the negative terminal 144.
  • the coupling unit 28 connects the rear end portion of the first battery unit 24 and the rear end portion of the second battery unit 28 with each other. Referring to Fig. 5, the coupling unit 28 passes the through-hole 48a and the through-hole 56a in the coupling portion X3.
  • Fig. 11 is a rear view of the coupling unit 28.
  • Fig. 12 is a sectional view of the coupling unit 28.
  • Fig. 12(a) is a sectional view taken in line B-B in Fig. 11 whereas Fig. 12(b) is sectional view taken in line C-C in Fig. 11.
  • the coupling unit 28 includes a rectangular substrate 150, a lead member 152 provided on a back surface of the substrate 150, a plurality (six in this embodiment) of rectangular lead members 154 provided on the back surface of the substrate 150, and a plurality (eight in this embodiment) of rectangular lead members 156 provided on a front surface of the substrate 150.
  • the substrate 150 is made of an insulating material such as a resin, for example.
  • the lead member 152 is bent, having an upward protruding center portion in terms of the left-right direction.
  • the substrate 150 has a plurality (fourteen in this embodiment) of columnar protrusions 150a protruding rearward.
  • the protrusions 150a are formed in line along a right end portion and a left end portion of the substrate 150 in the up-down direction.
  • the lead member 152 has four through-holes 152a. Out of the four through-holes 152a, two through-holes 152a on the inner side are fitted with the protrusions 150a. Thus, the lead member 152 is attached to the substrate 150.
  • the lead member 152 is welded for example, to the substrate 150.
  • each lead member 154 has four through-holes 154a, like the lead member 152. Out of the four through-holes 154a, two through-holes 154a on the inner side are fitted with the protrusions 150a. Thus, each lead member 154 is attached to the substrate 150.
  • the lead members 154 are welded for example, to the substrate 150.
  • each lead member 156 has four through-holes 156a.
  • the lead members 156 are arranged in line in the up-down direction so that two of the through-holes 156a on the inner side of each lead member 156 communicate with two of the through-holes 150b on the inner side in the substrate 150.
  • each lead member 156 see Fig. 2 and Fig. 6
  • two screws 158 are inserted from the front of each lead member 156 (see Fig. 2 and Fig. 6) through the two inner-side through-holes 156a (see Fig. 12(b)) of the lead member 156 (see Fig. 2 and Fig. 6) and trough the two inner-side through-holes 150b (see Fig. 11 and Fig. 12(b)) of the substrate 150.
  • the lead members 156 are fixed to the substrate 150.
  • the coupling unit 28 is fixed to the first battery unit 24 with a plurality of screws 160, and to the second battery unit 26 with a plurality of screws 162. Specifically, the screws 160 are inserted from the rear of the substrate 150 through the leftmost through-holes 150b (see Fig. 11) of the substrate 150 and through the leftmost through-holes 156a (see Fig. 12(b)) of the lead members 156 (see Fig. 11).
  • each screw 160 has its tip portion fixed into a corresponding one of the bosses 94d in the battery holder 94.
  • the coupling unit 28 is fixed to the battery holder 94 of the first battery unit 24, together with the rear end portion of the lead member 102a (see Fig. 7), the rear end portions of the lead members 102b and the rear end portion of the lead member 102c.
  • the rear end portion of the lead member 102a (see Fig. 6), the rear end portions of the lead members 102b, and the rear end portion of the lead member 102c are each connected to the lead member 156.
  • screws 162 are inserted from the rear of the substrate 150 through the rightmost through-holes 150b (see Fig. 11) of the substrate 150 and through the rightmost through-holes 156a (see Fig. 12(b)) of the lead member 156 (see Fig. 11).
  • the screws 162 are inserted further through the through-hole 108e (see Fig. 9) in the lead member 108a, the through-holes 108g (see Fig. 9) in the lead members 108b and the through-hole 108j (see Fig. 9) in the lead member 108c.
  • each screw 162 see Fig.
  • the coupling unit 28 is fixed to the battery holder 104 of the second battery unit 26, together with the rear end portion of the lead member 108a, the rear end portions of the lead members 108b and the rear end portion of the lead member 108c. Also, the rear end portion of the lead member 108a, the rear end portions of the lead members 108b, and the rear end portion of the lead member 108c are each connected to the lead member 156.
  • a left end portion of the lead member 152 and left end portions of the lead members 154 are fixed to the bosses 92d of the battery holder 92 together with rear end portions of the lead members 100, with screws 164.
  • the screw 164 is inserted through the through-hole 152a (see Fig. 11) in the left end portion of the lead member 152, and the through-hole 100b (see Fig. 7) of the lead member 100, and then the screw 164 has its tip portion fixed to the boss 92d.
  • the screws 164 are inserted through the through-holes 154a (see Fig. 11) in the left end portions of the lead members 154, and the through-holes 100b (see Fig. 7) of the lead members 100, and then the screws 164 have their tip portions fixed to the bosses 92d.
  • the lead members 100 are connected to the lead member 152 and the lead members 154.
  • a right end portion of the lead member 152 and right end portions of the lead members 154 are fixed to the bosses 106c in the battery holder 106 together with the rear end portions of the lead members 110, with screws 166.
  • the screw 166 is inserted through the through-hole 152a (see Fig. 11) in the right end portion of the lead member 152, and the through-hole 100b (see Fig. 9) of the lead member 110, and then the screw 166 has its tip portion fixed to the boss 106c.
  • the screws 166 are inserted through the through-holes 154a (see Fig. 11) in the right end portions of the lead members 154, and through-holes 110b (see Fig. 9) of the lead members 110, and then the screws 166 have their tip portions fixed to the bosses 106c.
  • the lead members 110 are connected to the lead member 152 and the lead members 154.
  • the lead members 156 in the coupling unit 28 make the lead member 102a, the lead members 102b and the lead member 102c of the first battery unit 24 connected to the lead member 108a, the lead members 108b and the lead member 108c of the second battery unit 26 respectively. Also, as understood from Fig. 3, the lead member 152 and the lead members 154 of the coupling unit 28 connect the lead members 100 of the first battery unit 24 with the respective lead members 110 of the second battery unit 26.
  • electrically parallel connection is established between the batteries 90 in the first tier of the first battery unit 24 and the batteries 90 in the first tier of the second battery unit 26 by the lead member 156 and the lead member 152. Also, electrically parallel connection is established between the batteries 90 in the second tier of the first battery unit 24 and the batteries 90 in the second tier of the second battery unit 26 by the lead member 152 and the lead member 156. Further, electrically parallel connection is established between the batteries 90 in the third tier of the first battery unit 24 and the batteries 90 in the third tier of the second battery unit 26 by the lead member 156 and the lead member 154.
  • the lead member 112, the lead member 128, the lead member 152, the lead members 154, and the lead members 156 constitute a connecting portion X4 for electrically connecting the first battery unit 24 and the second battery unit 26 with each other.
  • the lead members 100, the lead member 102a, the lead members 102b, and the lead member 102c are connected to the circuit substrate 96a in the controller 96.
  • the controller 96 can detect voltages of the batteries 90 in each tier of the first battery unit 24 as well as voltages of the batteries 90 in each tier of the second battery unit 26.
  • the battery unit 22 further includes a charging-purpose positive terminal 168, a TXD terminal 170 for sending information (temperature, current, voltage, frequency of use, etc.) about the batteries 90 to an external apparatus outside of the battery pack 10, and an RXD terminal 172 for receiving control information for the batteries 90 from an external apparatus outside of the battery pack 10.
  • the positive terminal 168, the TXD terminal 170 and the RXD terminal 172 are each electrically connected to the controller 96.
  • FIG. 5 shows only one of the collars 174 on the front side are disposed so as to pass through the through-hole 46a and the through-hole 54a in the coupling portion X3.
  • the support portion 30 in the first case portion 14 has the pair of bosses 36a each having a tip portion (right end portion); and the pair of bosses 38a each having a tip portion (right end portion). These tip portions are fitted into the four bosses 92f.
  • the support portion 66 in the fourth case portion 20 has the pair of bosses 72a each having a tip portion (left end portion); and the pair of bosses 74a each having a tip portion (left end portion). These tip portions are fitted into the four bosses 104g.
  • the upper side two collars 174 have their left end portions inserted through the bosses 92f and then fitted into the bosses 36a, whereas the right end portions are inserted through bosses 104g and then fitted into the bosses 72a.
  • the lower side two collars 174 have their left end portions inserted through the bosses 92f and then fitted into the bosses 38a, whereas the right end portions are inserted through the bosses 104g and then fitted into the bosses 74a.
  • a bolt 176 is inserted into each collar 174 from the right side of the fourth case portion 20, and then a nut 178 is threaded around a tip portion of each bolt 176.
  • the battery unit 22 is supported by the support portion 30 and the support portion 66.
  • a plurality of screws fix the first case portion 14 and the second case portion 16 to the first battery unit 24, and a plurality of screws fix the third case portion 18 and the fourth case portion 20 to the second battery unit 26.
  • the first battery unit 24 is housed in the first storage portion X1 (the first storage space 86) of the case 12
  • the second battery unit 26 is housed in the second storage portion X2 (the second storage space 88)
  • a plurality of batteries 90 in the first battery unit 24 and a plurality of batteries 90 in the second battery unit 26 are electrically connected by the connecting portion X4.
  • the battery pack 10 can have a large energy capacity since it has the first battery unit 24 and the second battery unit 26 which are electrically connected to each other by the connecting portion X4.
  • the first battery unit 24 and the second battery unit 26 are disposed with the heat releasing space 84 in between, the arrangement reduces increase in the two-dimensional space needed for disposing a plurality of batteries 90.
  • Heat generated in the first battery unit 24 is released from the heat releasing portion 32 of the first case portion 14 to the outside of the case 12, as well as from the platy portion 50 of the second case portion 16 to the heat releasing space 84.
  • Heat generated in the second battery unit 26 is released from the heat releasing portion 68 of the fourth case portion 20 to the outside of the case 12, as well as from the platy portion 58 of the third case portion 18 to the heat releasing space 84.
  • the heat releasing space 84 can be used as a pace for releasing heat which is generated in the battery unit 22, and therefore it is possible to increase heat releasing ability of the battery pack 10.
  • the first case portion 14 and the second case portion 16 are assembled with each other to form the first storage portion X1 whereas the second case portion 16 and the third case portion 18 are assembled with each other to form the coupling portion X3, and the third case portion 18 and the fourth case portion 20 are assembled with each other to form the second storage portion X2. Also, as the second case portion 16 and the third case portion 18 are assembled with each other, the heat releasing space 84 is provided between the second case portion 16 and the third case portion 18. In this way, the case 12 can be obtained easily.
  • the first battery unit 24 and the second battery unit 26 are electrically connected to each other by the connecting portion X4 (Fig. 10), which is housed inside the case 12.
  • the connecting portion X4 used for electrically connecting the first battery unit 24 and the second battery unit 26 with each other is provided outside the case 12
  • the case 12 is provided, for example, with a guide portion (e.g. a hole which penetrates the case) arranged to guide the connecting portion X4 to the outside of the case 12.
  • the guide portion decreases sealing in the case 12, so it is desirable to provide the guide portion with some means for increased sealing (e.g. water-tight seal) for the case 12.
  • the connecting portion X4 is housed in the case 12, so it is not necessary to provide a guide portion to guide the connecting portion X4 to the outside of the case 12. Therefore, there is no need for arrangements to improve sealing as mentioned above, and it becomes possible to easily increase the sealing of the case 12.
  • part of the coupling portion X3 overlaps with the first battery unit 24, and when the coupling portion X3 and the second battery unit 26 are viewed in parallel with the axial direction of the batteries 90 in the second battery unit 26, part of the coupling portion X3 overlaps with the second battery unit 26. In still other words, part of the coupling portion X3 is between the first battery unit 24 and the second battery unit 26. Forming the coupling portion X3 as described helps reduce a dimension of the case 12 in the fore-aft direction. The arrangement reduces two-dimensional size of the case 12, helping to make the battery pack 10 compact.
  • the coupling portion X3 serves for connecting the first storage portion X1 and the second storage portion X2 with each other, and also for guiding the connecting portion X4 (see Fig. 10) from the first storage portion X1 to the second storage portion X2. Therefore, in the battery pack 10, it is not necessary to provide arrangements for guiding the connecting portion X4 from the first storage portion X1 to the second storage portion X2 separately from the coupling portion X3. As a result, it is possible to simplify the construction of the battery pack 10.
  • each battery 90 has an end surface (the terminal electrode 90a or the terminal electrode 90b) oriented to the heat releasing space 84.
  • the arrangement allows efficient release of heat which is generated by each battery 90 to the heat releasing space 84.
  • the batteries 90 are columnar or substantially columnar, and each battery 90 has a greater dimension in its axial direction than the diameter of the battery 90.
  • each battery 90 has its one end surface (terminal electrode 90a or terminal electrode 90b) oriented to the heat releasing space 84
  • a smaller two-dimensional area for disposing the batteries 90 than in cases where each battery 90 is disposed in such a fashion that its outer circumferential surface is oriented to the heat releasing space 84.
  • the heat releasing space 84 In the battery pack 10, space outside of the case 12 (the through-hole provided in the center region of the case 12 to penetrate the case 12 in the up-down direction) is utilized as the heat releasing space 84. Therefore, it is possible to release heat efficiently in the up-down direction via the heat releasing space 84.
  • the batteries 90 in the first battery unit 24 and the batteries 90 in the second battery unit 26 are electrically connected in parallel to each other. Therefore, the arrangement makes it possible to increase energy capacity of the battery pack 10 sufficiently.
  • one controller 96 controls the first battery unit 24 and the second battery unit 26, so the control system of the battery pack 10 can have a simple configuration.
  • the substrate 150, the lead member 152, the lead members 154 and the lead members 156 are all integrated into a unit as the coupling unit 28, and by attaching the coupling unit 28 to the first battery unit 24 and the second battery unit 26, the first battery unit 24 and the second battery unit 26 are electrically connected to each other.
  • the battery pack 10 has an improved assemblability in comparison to cases where the lead member 152, the lead members 154 and the lead members 156 are attached to the first battery unit 24 and the second battery unit 26 one by one.
  • the first battery unit 24 and the second battery unit 26 are electrically connected to each other by the connecting portion X4 (see Fig. 10).
  • the lead member 152, the lead members 154 and the lead members 156 in the connecting portion X4 can be eliminated.
  • the lead member 112 and the lead member 128 constitute a connecting portion for electrically connecting the first battery unit 24 and the second battery unit 26 with each other.
  • the first battery unit 24 and the second battery unit 26 are connected electrically in parallel to each other.
  • the electrical connection between the first battery unit and the second battery unit may be in series.
  • Fig. 13 shows a battery pack 10a in which the first battery unit and the second battery unit are electrically connected in series.
  • the battery pack 10a includes a box-like case 180.
  • the case 180 includes a first case portion 182, a second case portion 184, a third case portion 186 and a fourth case portion 188.
  • the case 180 is made of an insulating material such as a resin, for example.
  • Fig. 14 is a front perspective view of a battery unit 22a which is to be housed in the case 12 whereas Fig. 15 is rear perspective view of a battery unit 22a. Also, Fig. 16 is an exploded perspective view of the battery pack 10a.
  • the battery unit 22a (see Fig. 14 and Fig. 15) includes a first battery unit 24a and a second battery unit 26a.
  • the first battery unit 24a is disposed between the first case portion 182 and the second case portion 184 whereas the second battery unit 26a is disposed between the third case portion 186 and the fourth case portion 188.
  • Fig. 17 is an illustrative front view of the battery pack 10a; Fig. 18 is an illustrative plan view of the battery pack 10a; and Fig. 19 is an illustrative bottom view of the battery pack 10a.
  • Fig. 18 and Fig. 19 shows a section of the case 180 when the case 180 is cut in its center region in terms of the up-down direction.
  • Fig. 17 shows a section of the case 18 when the case 180 is cut in lines D-D in Fig. 18.
  • the battery unit 22a is drawn in a simplified fashion in order to avoid complication in the drawings.
  • the first case portion 182 includes a support portion 190 and a heat releasing portion 192 protruding leftward from the support portion 190.
  • the support portion 190 includes a frame portion 194 and side wall portions 196, 198.
  • the side wall portion 196 includes a pair of bosses 196a (Fig. 17 shows only one of the bosses 196a) extending rightward; and a through-hole (not illustrated) for a positive terminal 284, to be described later, to protrude from inside of the case 180 to outside of the case 180.
  • one of the bosses 196a is at a front end portion of the side wall portion 196 while the other boss 196a is at a rear end portion of the side wall portion 196.
  • the side wall portion 198 has a pair of bosses 198a (Fig. 17 shows only one of the bosses 198a) extending rightward.
  • One of the bosses 198a is at a front end portion of the side wall portion 198 while the other boss 198a is at a rear end portion of the side wall portion 198.
  • the second case portion 184 includes a frame portion 200 which is rectangular in a side view or substantially rectangular in a side view; a frame portion 202 which is rectangular in a side view or substantially rectangular in a side view and extending rightward from a front end portion of the frame portion 200; and a frame portion 204 which is rectangular in a side view or substantially rectangular in a side view and extending rightward from a rear end portion of the frame portion 200.
  • Fig. 13 shows a border between the frame portion 200 and the frame portion 202, and a border between the frame portion 200 and the frame portion 204, indicated by alternate long and short dash lines.
  • the second case portion 184 further includes a rectangular platy portion 206 connecting the frame portion 202 and the frame portion 204 at a right end portion of the frame portion 200.
  • the platy portion 206 has an upper end portion and a lower end portion connected to the frame portion 200.
  • the frame portion 202 and the frame portion 204 protrude rightward beyond the platy portion 206.
  • the frame portion 200 provides a rectangular parallelepiped or substantially rectangular parallelepiped opening 200a; the frame portion 202 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 202a penetrating in the left-right direction; and the frame portion 204 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 204a penetrating in the left-right direction.
  • the through-hole 202a and the through-hole 204a communicate with the opening 200a.
  • a groove portion 200b is formed along a left edge of the frame portion 200.
  • Fig. 16 does not show the groove portion 200b.
  • an annular water-tight seal 208 is fitted into the groove portion 200b (see Fig. 17 through Fig. 19).
  • the frame portion 194 of the first case portion 182 is fitted into the groove portion 200b (see Fig. 17 through Fig. 19).
  • the first case portion 182 and the second case portion 184 are connected with each other.
  • the first case portion 182 and the second case portion 184 are further fixed to each other by a plurality of fasteners (not illustrated) such as screws.
  • the third case portion 186 includes frame portions 210, 212 spaced from each other in the fore-aft direction in parallel or substantially parallel to each other; and a platy portion 214 connecting the frame portion 210 and the frame portion 212 with each other.
  • the frame portion 210, the frame portion 212 and the platy portion 214 are rectangular or substantially rectangular in a side view respectively.
  • the frame portion 210 and the frame portion 212 protrude leftward beyond the platy portion 214.
  • the third case portion 186 further includes a protruding portion 216 provided along its outer circumferential edge to protrude rightward from the frame portion 210, the frame portion 212 and the platy portion 214.
  • the frame portion 210 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 210a penetrating in the left-right direction
  • the frame portion 212 provides a rectangular parallelepiped or substantially rectangular parallelepiped through-hole 212a penetrating in the left-right direction.
  • a groove portion 210b is formed along a left edge of the frame portion 210 whereas a groove portion 212b is formed along a left edge of the frame portion 212.
  • the groove portion 210b and the groove portion 212b opens leftward.
  • Fig. 16 does not show the groove portion 210b or the groove portion 212b.
  • an annular water-tight seal 218 is fitted into the groove portion 210b (see Fig. 18 and Fig. 19).
  • the frame portion 202 of the first case portion 184 is fitted into the groove portion 210b (see Fig. 18 and Fig. 19).
  • an annular water-tight seal 220 is fitted into the groove portion 212b (see Fig. 18 and Fig. 19).
  • the frame portion 204 of the second case portion 184 is fitted into the groove portion 212b (see Fig. 18 and Fig. 19).
  • the frame portion 202 and the frame portion 210 are connected with each other, and the frame portion 204 and the frame portion 212 are connected with each other.
  • the second case portion 184 and the third case portion 186 are connected with each other.
  • the second case portion 184 and the third case portion 186 are further fixed to each other by a plurality of fasteners (not illustrated) such as screws.
  • the fourth case portion 188 includes a support portion 222 and a heat releasing portion 224 protruding rightward from the support portion 222.
  • the support portion 222 includes a frame portion 226 and side wall portions 228, 230.
  • the side wall portion 228 has a pair of bosses 228a extending leftward; and a through-hole 228b for a negative terminal 270 to be described later, to protrude from inside of the case 180 to outside of the case 180.
  • One of the bosses 228a is at a front end portion of the side wall portion 228 (see Fig. 17) to oppose to the boss 196a (see Fig. 17) which is provided in the front end portion of the side wall portion 196, in the left-right direction.
  • the other boss 228a is at a rear end portion of the side wall portion 228 to oppose to the boss 196a which is provided in the rear end portion of the side wall portion 196 (see Fig. 17), in the left-right direction.
  • the side wall portion 230 has a pair of bosses 230a (Fig. 17 shows only one of the bosses 230a) extending leftward.
  • One of the bosses 230a is at a front end portion of the side wall portion 230 to oppose to the boss 198a, which is provided in the front end portion of the side wall portion 198, in the left-right direction.
  • the other boss 230a is at a rear end portion of the side wall portion 230 to oppose to the boss 198a, which is provided in the rear end portion of the side wall portion 198, in the left-right direction.
  • a groove portion 226a is formed along a left edge of the frame portion 226.
  • the groove portion 226a opens leftward.
  • Fig. 16 does not show the groove portion 226a.
  • an annular water-tight seal 232 is fitted into the groove portion 226a (see Fig. 17 through Fig. 19).
  • the protruding portion 216 of the third case portion 186 is fitted into the groove portion 226a (see Fig. 17 through Fig. 19).
  • the third case portion 186 and the fourth case portion 188 are connected with each other.
  • the third case portion 186 and the fourth case portion 188 are further fixed to each other by a plurality of fasteners (not illustrated) such as screws.
  • the second case portion 184 and the third case portion 186 provide a space 234 penetrating the case 180 in the up-down direction at a center region or a substantially center region of the case 180.
  • the space 234 serves as a heat releasing space for releasing heat generated by the first battery unit 24a and the second battery unit 26a.
  • the space 234 will be called heat releasing space 234.
  • the heat releasing space 234 is provided as a through-hole.
  • the heat releasing space 234 is a space outside of the case 180.
  • the first case portion 182, the frame portion 200 of the second case portion 184 and the platy portion 206 of the second case portion 184 constitute a first storage portion Y1;
  • the platy portion 214 of the third case portion 186, the protruding portion 216 of the third case portion 186 and the fourth case portion 188 constitute a second storage portion Y2;
  • the frame portion 202 of the second case portion 184, the frame portion 204 of the second case portion 184, the frame portion 210 of the third case portion 186 and the frame portion 212 of the third case portion 186 constitute a coupling portion Y3.
  • the heat releasing space 234 is provided between the first storage portion Y1 and the second storage portion Y2.
  • the first storage portion Y1 has a first storage space 236 for storing the first battery unit 24a whereas the second storage portion Y2 has a second storage space 238 for storing the second battery unit 26a.
  • the first storage space 236 and the second storage space 238 communicate with each other via the through-holes 202a, 204a, 210a and 212a of the coupling portion Y3.
  • Fig. 20 is an exploded perspective view of the second battery unit 26a.
  • Fig. 21 is an illustrative side view when inside of the battery pack 10a is viewed from the right side. Note that Fig. 21 does not show the fourth case portion 188 (see Fig. 16) or the water-tight seal 232 (see Fig. 16) in order to give easier understanding about the internal structure of the battery pack 10a.
  • the second battery unit 26a includes a plurality of rechargeable batteries 90 (see fig. 20 and Fig. 21) disposed in parallel to each other; a battery holder 240; a battery holder 242 and a controller 244.
  • the batteries 90 may be provided by the same batteries as the batteries 90 in the battery pack 10.
  • the batteries 90 are arranged so that twelve batteries make a row in the fore-aft direction and these rows of batteries are stacked in seven tiers in the up-down direction.
  • the battery 90 in one of the tiers is between two batteries 90 in the other tier in the fore-aft direction (except for the first battery 90 or the last battery 90 in each row of the batteries 90).
  • the batteries 90 are disposed in a staggered pattern.
  • any two batteries 90 which are adjacent to each other in the up-down direction are oriented in opposed directions to each other.
  • Any two batteries 90 which are adjacent to each other in the fore-aft direction are oriented in the same direction as each other.
  • the batteries 90 are arranged so that their terminal electrodes 90a (positive electrodes) are oriented to the left whereas the batteries 90 in the second, fourth and sixth tiers from the top are arranged with their terminal electrodes 90b (negative electrodes) oriented to the left.
  • the battery holder 240 includes a rectangular or substantially rectangular platy portion 240a; a holder portion 240b protruding leftward from the platy portion 240a; a plurality (two in this embodiment) of bosses 240c (see Fig. 20) extending forward from the holder portion 240b; and a rectangular or substantially rectangular platy portion 240d extending upward from the holder portion 240b.
  • the platy portion 240d is on a more left side than the platy portion 240a.
  • the battery holder 240 has a plurality of through-holes 240e penetrating the platy portion 240a and the holder portion 240b in the left-right direction.
  • the through-holes 240e are formed correspondingly to the batteries 90.
  • the platy portion 240a has four corners each provided with a cylindrical or substantially cylindrical boss 240f extending in the left-right direction.
  • the battery holder 242 includes a holder portion 242a and bosses 242b extending forward from the holder portion 242a.
  • the holder portion 242a has a plurality of through-holes 242c penetrating in the left-right direction.
  • the through-holes 242c are formed correspondingly to the batteries 90.
  • the battery holder 240 and the battery holder 242 are assembled with each other so that the batteries 90 are housed in the through-holes 240e and the through-holes 242c.
  • the battery holder 240 and the battery holder 242 are fixed to each other by a plurality of unillustrated fasteners (e.g., screws), for example.
  • the controller 244 includes a rectangular circuit substrate 244a, a CPU (not illustrated) mounted on the circuit substrate 244a, and a memory (not illustrated) mounted on the circuit substrate 244a.
  • the controller 244 detects temperatures, currents, voltages, frequency of use and so on of the batteries 90, thereby monitors the batteries 90 and controls the batteries 90 as well.
  • the controller 244 may be provided by a BMC (Battery Management Controller) for example.
  • the circuit substrate 244a is attached to the bosses 240c (see Fig. 20 and Fig. 21) of the battery holder 240 (see Fig. 14 and Fig. 20) and the bosses 242b (see Fig. 20 and Fig. 21) of the battery holder 242 (see Fig. 14 and Fig. 20), with a plurality (three in this embodiment) of screws 246 (see Fig. 14 and Fig. 21).
  • the controller 244 is fixed to the battery holder 240 and the battery holder 242.
  • a plurality (three in this embodiment) of lead members 248a and a lead member 248b are connected on a left end portion of the bunch of batteries 90.
  • one lead member 248a is connected to the terminal electrodes 90a (positive electrodes) of the batteries 90 in the first tier from the top and to the terminal electrodes 90b (negative electrodes) of the batteries 90 in the second tier.
  • This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the first tier, and electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the second tier.
  • this establishes electrically serial connection of the terminal electrodes 90a of the batteries 90 in the first tier to the terminal electrodes 90b of the batteries 90 in the second tier.
  • the lead member 248a is welded for example, to the terminal electrodes 90a and the terminal electrodes 90b.
  • the other two lead members 248a are connected to the batteries 90 in the third tier through the sixth tier.
  • the lead members 248a and the lead member 248b are each provided by lead plates. The same applies to lead members 252a, 252b, 260, 266, 276a, 276b, 278a, 278b, 286, 292 to be described later.
  • the lead member 248b has a main body portion 248c extending in the fore-aft direction, and a hook portion 248d extending downward from the main body portion 248c.
  • the hook portion 248d has a tip portion extending rightward.
  • the main body portion 248c of the lead member 248b is connected to the terminal electrodes 90a of the batteries 90 in the seventh tier from the top. This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the seventh tier.
  • the main body portion 248c of the lead member 248b is welded for example, to the terminal electrodes 90a. Referring to Fig. 19, the hook portion 248d of the lead member 248b is fixed to the holder portion 240b of the battery holder 240 with a screw 250.
  • a lead member 252a and a plurality (three in this embodiment) of lead members 252b are connected on a right end portion of the bunch of batteries 90.
  • the lead member 252a has a main body portion 252c extending in the fore-aft direction, and a hook portion 252d extending upward from the main body portion 252c.
  • the hook portion 252d has a tip portion extending leftward.
  • the main body portion 252c of the lead member 252a is connected to the terminal electrodes 90b of the batteries 90 in the first tier from the top. This establishes electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the first tier.
  • the main body portion 252c of the lead member 252a is welded for example, to the terminal electrodes 90b. Referring to Fig. 14 and Fig. 18, the hook portion 252d of the lead member 252a is fixed to the holder portion 242a of the battery holder 242 with a screw 254.
  • one lead member 252b is connected to the terminal electrodes 90a of the batteries 90 in the second tier from the top, and to the terminal electrodes 90b of the batteries 90 in the third tier.
  • This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the second tier, and electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the third tier.
  • this establishes electrically serial connection of the terminal electrodes 90a of the batteries 90 in the second tier to the terminal electrodes 90b of the batteries 90 in the third tier.
  • the lead member 252b is welded for example, to the terminal electrodes 90a and the terminal electrodes 90b. In the same fashion, the other two lead members 252b are connected to the batteries 90 in the fourth tier through the seventh tier.
  • the batteries 90 in the first tier through the seventh tier are connected as described above, whereby the batteries 90 in each tier are electrically connected in parallel whereas the batteries 90 in the first tier through the seventh tier are electrically connected in series.
  • the lead members 248a, the lead member 248b, the lead member 252a and the lead members 252b have their respective tip portion electrically connected to the circuit substrate 244a in the controller 244 via unillustrated lead wires and so on.
  • the controller 244 can detect voltages of the batteries 90 in each tier of the second battery unit 26a.
  • the platy portion 240d of the battery holder 240 is provided with terminals 256, 258 like the battery pack 10 is provided with the terminals 134, 138 (see Fig. 2).
  • the terminal 256 is fixed to the platy portion 240d together with an end portion of a lead member 260 which is formed in a shape of a letter L in a side view or substantially in a shape of a letter L in a side view, with screws 262.
  • the other end portion of the lead member 260 is fixed to the holder portion 242a together with the hook portion 252d of the lead member 252a, with a screw 264.
  • the batteries 90 in the second battery unit 26a and the terminal 256 are electrically connected.
  • the terminal 258 is fixed to the platy portion 240d with screws 268, together with an end portion of a lead member 266 which is formed in a zigzag shape like a staircase in a front view.
  • a negative terminal 270 for charging-/discharging purpose extends rightward at a more forward position than the platy portion 240d in an upper end portion of the platy portion 240a.
  • the negative terminal 270 is fixed to the platy portion 240a together with the other end of the lead member 266. This establishes electrical connection between the terminal 258 and the negative terminal 270.
  • the first battery unit 24a includes a battery holder 272, a battery holder 274 and a plurality of batteries 90 (see Fig. 15) housed in the battery holder 272 and the battery holder 274.
  • the battery holder 272 which has essentially the same construction as the holder portion 242a in the battery holder 242 of the second battery unit 26a, has a plurality of through-holes (not illustrated) for storing the batteries 90.
  • the battery holder 274 which has essentially the same construction as the battery holder 240 of the second battery unit 26a, includes a rectangular or substantially rectangular platy portion 274a, and a holder portion 274b protruding rightward from the platy portion 274a. Also, like the battery holder 240, the battery holder 274 has a plurality of through-holes (not illustrated) for storing the batteries 90.
  • the platy portion 274a has four corners each provided with a cylindrical or substantially cylindrical boss 274c extending in the left-right direction.
  • the battery holder 272 and the battery holder 274 are assembled with each other so that the batteries 90 are housed in the through-holes in the battery holder 272 and the through-holes in the battery holder 274.
  • the battery holder 272 and the battery holder 274 are fixed to each other by a plurality of unillustrated fasteners (e.g., screws), for example.
  • the first battery unit 24a includes the same number of batteries 90 as the second battery unit 26a.
  • the batteries 90 in the first battery unit 24a are housed in the battery holders 272, 274 in the same orientation and the same layout as the batteries 90 in the second battery unit 26a in Fig. 20. Therefore, in the battery unit 22a, the batteries 90 are arranged in such a fashion that terminal electrodes 90a of the batteries 90 in the first battery unit 24a oppose to terminal electrodes 90b of the batteries 90 in the second battery unit 26a whereas terminal electrodes 90b of the batteries 90 in the first battery unit 24a oppose to terminal electrodes 90a of the batteries 90 in the second battery unit 26a.
  • a lead member 276a and a plurality (three in this embodiment) of lead members 276b are connected on a left end portion of the bunch of batteries 90 housed in the battery holders 272, 274, a lead member 276a and a plurality (three in this embodiment) of lead members 276b are connected.
  • the lead member 276a has a main body portion 276c extending in the fore-aft direction, and a hook portion 276d extending upward from the main body portion 276c.
  • the hook portion 276d has a tip portion extending rightward.
  • the main body portion 276c of the lead member 276a is connected to the terminal electrodes 90a of the batteries 90 in the first tier from the top. This establishes electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the first tier.
  • the main body portion 276c of the lead member 276a is welded for example, to the terminal electrodes 90a. Referring to Fig. 15 and Fig. 18, the hook portion 276d of the lead member 276a is fixed to the battery holder 272 with a screw 277.
  • one lead member 276b is connected to the terminal electrodes 90b of the batteries 90 in the second tier from the top, and to the terminal electrodes 90a of the batteries 90 in the third tier.
  • This establishes electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the second tier, and electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the third tier.
  • this establishes electrically serial connection of the terminal electrodes 90b of the batteries 90 in the second tier to the terminal electrodes 90a of the batteries 90 in the third tier.
  • the lead member 276b is welded for example, to the terminal electrodes 90b and the terminal electrodes 90a. In the same fashion, the other two lead members 276b are connected to the batteries 90 in the fourth tier through the seventh tier.
  • a plurality (three in this embodiment) of lead members 278a and a lead member 278b are connected on a right end portion of the bunch of batteries 90 (see Fig. 15) housed in the battery holders 272, 274, a plurality (three in this embodiment) of lead members 278a and a lead member 278b are connected.
  • one lead member 278a is connected to the terminal electrodes 90b (see Fig. 15) of the batteries 90 (see Fig. 15) in the first tier from the top and to the terminal electrodes 90a (see Fig. 15) of the batteries 90 (see Fig. 15) in the second tier.
  • This establishes electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the first tier, and electrically parallel connection among the terminal electrodes 90a of the batteries 90 in the second tier.
  • this establishes electrically serial connection of the terminal electrodes 90b of the batteries 90 in the first tier to the terminal electrodes 90a of the batteries 90 in the second tier.
  • the lead member 278a is welded for example, to the terminal electrodes 90b and the terminal electrodes 90a.
  • the other two lead members 278a are connected to the batteries 90 in the third tier through the sixth tier.
  • the lead member 278b has a main body portion 278c extending in the fore-aft direction, and a hook portion 278d extending downward from the main body portion 278c.
  • the hook portion 278d has a tip portion extending leftward.
  • the main body portion 278c of the lead member 278b is connected to the terminal electrodes 90b (see Fig. 15) of the batteries 90 (see Fig. 15) in the seventh tier from the top. This establishes electrically parallel connection among the terminal electrodes 90b of the batteries 90 in the seventh tier.
  • the main body portion 278c of the lead member 278b is welded for example, to the terminal electrodes 90b. Referring to Fig. 19, the hook portion 278d of the lead member 278b is fixed to the holder portion 274b of the battery holder 274 with a screw 280.
  • the batteries 90 in the first tier through the seventh tier are connected as described above, whereby the batteries 90 in each tier are connected electrically in parallel whereas the batteries 90 in the first tier through the seventh tier are connected electrically in series.
  • the lead member 276a, the lead members 276b, the lead members 278a and the lead member 278b are electrically connected to the circuit substrate 244a of the controller 244 via a plurality of lead wires 281.
  • the controller 244 can detect voltages of the batteries 90 in each tier of the first battery unit 24a.
  • a fuse 282 is provided ahead of the hook portion 276d in an upper end portion of the platy portion 274a, and a discharge-purpose positive terminal 284 is provided ahead of the fuse 282 to extend leftward.
  • the fuse 282 has a terminal 282a, which is fixed to the platy portion 274a with a screw 288, together with an upper end portion of an L-shaped or substantially L-shaped lead member 286.
  • the lead member 286 has its lower end portion fixed to the battery holder 272 with a screw 290, together with the hook portion 276d of the lead member 276a.
  • the fuse 282 has another terminal 282b fixed to the platy portion 274a with a screw 294, together with a rear end portion of a lead member 292 which extends in the fore-aft direction.
  • the lead member 292 has a front end portion fixed to the platy portion 274a together with the positive terminal 284.
  • the batteries 90 in the first battery unit 24a are electrically connected to the positive terminal 284 via the fuse 282.
  • a connecting portion 296 passes through the through-holes 202a, 210a in the coupling portion Y3 and extends in the left-right direction.
  • the connecting portion 296 has an end fixed to the holder portion 274b with a screw 297, together with a hook portion 278d of the lead member 278b; and another end fixed to the holder portion 240b with a screw 297, together with the hook portion 248d of the lead member 248b.
  • the batteries 90 in the first battery unit 24a and the batteries 90 in the second battery unit 26b are connected electrically in series by the connecting portion 296.
  • the connecting portion 296 may be provided by a lead plate or a lead wire.
  • a service plug 298 is attached to the frame portion 226 of the fourth case portion 188.
  • the service plug 298 has a coupling terminal (not illustrated) protruding from the frame portion 226 into the case 180. This coupling terminal connects the terminal 256 (see Fig. 14) with the terminal 258 (see Fig. 14).
  • the batteries 90 in the first battery unit 24 and the batteries 90 in the second battery unit 26 which are connected electrically in series are electrically connected to the negative terminal 270 via the service plug 298.
  • the service plug 298 is attachable to and detachable from the frame portion 226.
  • the battery unit 22a further includes a charging-purpose positive terminal 300, a TXD terminal 302 for sending information about the batteries 90 (temperature, current, voltage, frequency of use, etc.) to an external apparatus outside of the battery pack 10a, and an RXD terminal 304 for receiving control information for the batteries 90 from the external apparatus outside of the battery pack 10a.
  • the positive terminal 300, the TXD terminal 302 and the RXD terminal 304 are each electrically connected to the controller 244.
  • FIG. 14 through Fig. 19 four cylindrical collars 306 are supported respectively by the four bosses 274c in the battery holder 274 and by the four bosses 240f in the battery holder 240.
  • FIG. 18 and Fig. 19 two of the collars 306 on the front side are disposed so as to pass through the through-holes 202a, 210a in the coupling portion Y3.
  • Two of the collars 306 on the rear side are disposed so as to pass through the through-holes 204a, 212a in the coupling portion Y3.
  • the lead wires 281 pass through the through-holes 202a, 210a in the coupling portion Y3.
  • the first case portion 182 has the pair of bosses 196a (Fig. 17 shows only one of the bosses 196a) each having a tip portion (right end portion); and the pair of bosses 198a (Fig. 17 shows only one of the bosses 198a) each having a tip portion. These tip portions are fitted into four bosses 274c.
  • the fourth case portion 188 has the pair of bosses 228a (Fig. 17 shows only one of the bosses 228a) each having a tip portion (left end portion); and the pair of bosses 230a (Fig. 17 shows only one of the bosses 230a) each having a tip portion. These tip portions are fitted into four bosses 240f.
  • a bolt 308 is inserted into each collar 306 from the right side of the fourth case portion 188, and then a nut 310 is threaded around a tip portion of each bolt 308.
  • the battery unit 22a is supported by the support portion 190 and the support portion 222.
  • the battery pack 10a can have a large energy capacity since it has the first battery unit 24a and the second battery unit 26a which are electrically connected to each other by the connecting portion 296. Also, since the first battery unit 24a and the second battery unit 26a are disposed with the heat releasing space 234 in between, the arrangement reduces increase in the two-dimensional space needed for disposing a plurality of batteries 90. Heat generated in the first battery unit 24a is released from the heat releasing portion 192 of the first case portion 182 to the outside of the case 180, as well as from the platy portion 206 of the second case portion 184 to the heat releasing space 234.
  • Heat generated in the second battery unit 26a is released from the heat releasing portion 224 of the fourth case portion 188 to the outside of the case 180, as well as from the platy portion 214 of the third case portion 186 to the heat releasing space 234. As a result of these, it is possible to increase heat releasing ability of the battery pack 10a.
  • the first case portion 182 and the second case portion 184 are assembled with each other to form the first storage portion Y1 whereas the second case portion 184 and the third case portion 186 are assembled with each other to form the coupling portion Y3, and the third case portion 186 and the fourth case portion 188 are assembled with each other to form the second storage portion Y2. Also, as the second case portion 184 and the third case portion 186 are assembled with each other, the heat releasing space 234 is provided between the second case portion 184 and the third case portion 186. In this way, the case 180 can be obtained easily.
  • the first battery unit 24a and the second battery unit 26a are electrically connected to each other by the connecting portion 296, which is housed inside the case 180.
  • the case 180 is provided, for example, with a guide portion (e.g. a hole which penetrates the case) to guide the connecting portion 296 to the outside of the case 180.
  • the guide portion decreases sealing in the case 180, so it is desirable to include some means for increased sealing (e.g. water-tight seal) in the guide portion.
  • the connecting portion 296 is housed in the case 180, so it is not necessary to provide the guide portion to guide the connecting portion 296 to the outside of the case 180.
  • the arrangement eliminates the need for arrangements to improve sealing as mentioned above, making it possible to easily increase the sealing of the case 180.
  • part of the coupling portion Y3 overlaps with the first battery unit 24a
  • part of the coupling portion Y3 overlaps with the second battery unit 26a.
  • part of the coupling portion Y3 is between the first battery unit 24a and the second battery unit 26a.
  • the coupling portion Y3 serves for connecting the first storage portion Y1 and the second storage portion Y2 with each other, and also for guiding the connecting portion 296 (see Fig. 19) from the first storage portion Y1 to the second storage portion Y2. Therefore, in the battery pack 10a, it is not necessary to provide arrangements to guide the connecting portion 296 from the first storage portion Y1 to the second storage portion Y2 separately from the coupling portion Y3. As a result, it is possible to simplify the construction of the battery pack 10a.
  • a plurality of batteries 90 are disposed so that the batteries 90, even if not all of them, have their end surfaces (the terminal electrodes 90a or the terminal electrodes 90b) oriented to the heat releasing space 234.
  • a plurality of batteries 90 are disposed so that the batteries 90, even if not all of them, have their end surfaces (the terminal electrodes 90a or the terminal electrodes 90b) oriented to the heat releasing space 234. This makes it possible, like in the battery pack 10, to obtain the battery pack 10a which is compact and has increased heat releasing ability.
  • the heat releasing space 234 space outside of the case 180 (the through-hole provided in the center region of the case 180 to penetrate the case 180 in the up-down direction) is utilized as the heat releasing space 234. Therefore, it is possible to release heat efficiently in the up-down direction via the heat releasing space 234.
  • the batteries 90 in the first battery unit 24a and the batteries 90 in the second battery unit 26a are electrically connected in series.
  • the arrangement makes it possible to sufficiently increase an output voltage of the battery pack 10a.
  • one controller 244 controls the first battery unit 24a and the second battery unit 26a, so the control system of the battery pack 10a can have a simple configuration.
  • the second case portion and the third case portion are assembled simply without further arrangements.
  • Fig. 23 is a perspective view of a battery pack 10b according to still another embodiment of the present invention.
  • the battery pack 10b includes a case 312.
  • the case 312 includes a first case portion 314, a second case portion 316, a third case portion 318 and a fourth case portion 320.
  • the case 312 is made of an insulating material such as a resin, for example.
  • Fig. 24 is an exploded perspective view of a battery pack 10b.
  • Fig. 25 is a perspective view showing an internal structure of the battery pack 10b. It should be noted here that in Fig. 24 and Fig. 25, each constituent element in the battery pack 10b is drawn in a simplified fashion in order to avoid complication in the drawing.
  • the battery pack 10b further includes a first battery unit 24b and a second battery unit 26b.
  • the first battery unit 24b is disposed between a first case portion 314 and a second case portion 316 whereas the second battery unit 26b is disposed between a third case portion 318 and a fourth case portion 320.
  • the first case portion 314 includes a frame portion 322, and a platy heat releasing portion 324 which continues from a left edge of the frame portion 322.
  • the heat releasing portion 324 has four corner portions provided with bosses 324a.
  • Fig. 26 is an enlarged perspective view of the second case portion 316 and the third case portion 318.
  • the second case portion 316 includes a frame portion 326; a platy heat releasing portion 328 which continues from a right edge of the frame portion 326; and frame portions 330, 332 extending from the heat releasing portion 328 toward the third case portion 318.
  • the frame portion 330 is shaped correspondingly to the shape of a frame portion 340 of the third case portion 318 to be described later whereas the frame portion 332 is shaped correspondingly to the shape of a frame portion 342 to be described later.
  • the heat releasing portion 328 has four corners provided with bosses 328a, 328b, 328c, 328d respectively.
  • the heat releasing portion 328 further includes a plurality (four in this embodiment) of through-holes 328e, 328f, 328g, 328h.
  • the through-hole 328e and the through-hole 328f are spaced from each other in the fore-aft direction and extend in the fore-aft direction along a lower edge of the heat releasing portion 328.
  • the through-hole 328e and the through-hole 328f are partitioned from each other by a partitioning portion 328i (see Fig. 26) extending in the up-down direction.
  • the through-hole 328g is rectangular in a side view, and is formed in a front end portion of the heat releasing portion 328.
  • the through-hole 328h is rectangular in a side view, and is formed in a rear end portion of the heat releasing portion 328.
  • the heat releasing portion 328 further includes a plurality (two in this embodiment) of bosses 328j, 328k extending toward the third case portion 318.
  • the bosses 328j, 328k are formed to oppose to bosses 338j, 338k of the third case portion 318 to be described later, in the left-right direction.
  • the bosses 328c, 328d, the through-holes 328e, 328f, 328g, 328h and the bosses 328j, 328k are on the inner side of the frame portion 332.
  • the bosses 328j, 328k are provided at higher positions (more closely to the center of the battery pack 10b) than the through-holes 328e, 328f.
  • the frame portion 332 has an outer circumferential surface provided with a plurality (two in this embodiment) of bosses 334a, 334b.
  • the bosses 334a, 334b are formed to oppose to bosses 344a, 344b of the third case portion 318 to be described later, in the left-right direction.
  • the third case portion 318 includes a frame portion 336; a platy heat releasing portion 338 which continues from a left edge of the frame portion 336; and frame portions 340, 342 extending from the heat releasing portion 338 toward the second case portion 316.
  • the heat releasing portion 338 has four corners provided with bosses 338a, 338b, 338c, 338d respectively.
  • the heat releasing portion 338 further includes a plurality (four in this embodiment) of through-holes 338e, 338f, 338g, 338h.
  • the through-hole 338e and the through-hole 338f are spaced from each other in the fore-aft direction and extend in the fore-aft direction along a lower edge of the heat releasing portion 338.
  • the through-hole 338e and the through-hole 338f are partitioned from each other by a partitioning portion 338i (see Fig. 26) extending in the up-down direction.
  • the through-hole 338g is rectangular in a side view, and is formed in a front end portion of the heat releasing portion 338.
  • the through-hole 338h is rectangular in a side view, and is formed in a rear end portion of the heat releasing portion 338.
  • the heat releasing portion 338 further includes a plurality (two in this embodiment) of bosses 338j, 338k extending toward the second case portion 316.
  • the bosses 338c, 338d, the through-holes 338e, 338f, 338g, 338h and the bosses 338j, 338k are on the inner side of the frame portion 342.
  • the bosses 338j, 338k are provided at higher positions (more closely to the center of the battery pack 10b) than the through-holes 338e, 338f.
  • the frame portion 340 has an outer circumferential surface provided with a plurality (two in this embodiment) of bosses 344a, 344b.
  • the fourth case portion 320 includes a frame portion 346, and a platy heat releasing portion 348 which continues from a right edge of the frame portion 346.
  • the heat releasing portion 348 has four corner portions provided with bosses 348a.
  • the first battery unit 24b includes a plurality of batteries 90 (see Fig. 24) disposed in parallel to each other; and battery holders 350, 352 for holding the batteries 90.
  • the batteries 90 may be provided by the same batteries as the batteries 90 in the battery pack 10.
  • the batteries 90 are arranged in a plurality of rows and in a plurality of columns so that their terminal electrodes 90a (see Fig. 7) and terminal electrodes 90b (see Fig. 7) are on the same planes.
  • the batteries 90 are arranged in a grid pattern so that fourteen batteries make a row in the fore-aft direction and seven batteries make a column in the up-down direction.
  • any two batteries 90 mutually adjacent to each other in the fore-aft direction are oriented in opposite directions to each other, whereas in any two rows mutually adjacent to each other in the up-down direction, any battery 90 in one of the rows is oriented in the same direction as the adjacent one in the other row.
  • the battery holder 350 has four corner portions provided with bosses 350a (Fig. 24 shows only three of the bosses 350a).
  • a plurality (seven in this embodiment) of lead members 354 are connected on a left end portion of the bunch of batteries 90.
  • the lead members 354 are provided by lead plates. The same arrangement applies to lead members which will be described later.
  • a plurality (eight in this embodiment) of lead members are connected on a right end portion of the bunch of batteries 90.
  • the lead members 354 are connected to the left end portion of the bunch of batteries 90 while the other lead members (not illustrated) are connected to the right end portion of the bunch of batteries 90 so that the batteries 90 in each column are connected electrically in parallel while the first through the fourteenth batteries 90 in each row are connected electrically in series.
  • the second battery unit 26b includes a plurality of batteries 90 (see Fig. 24); and battery holders 356, 358 for holding the batteries 90.
  • the batteries 90 are arranged in the same fashion as the batteries 90 in the first battery unit 24b.
  • the battery holder 356 has four corner portions provided with bosses 356a (Fig. 24 shows only three of the bosses 356a).
  • the bunch of batteries 90 has its left end portion connected to a plurality (seven in this embodiment) of lead members 360 whereas the bunch of batteries 90 has its right end portion connected to a plurality (eight in this embodiment) of lead members (not illustrated). This establishes electrically parallel connection of the batteries 90 in each column, and electrically series connection of the first through the fourteenth batteries 90 in each row.
  • the first battery unit 24b and the second battery unit 26b are connected with each other by a coupling unit 362, a coupling unit 364, a lead member 366 and a lead member 368.
  • the coupling unit 362 includes a substrate 370 and a plurality of lead members 372 fixed to the substrate 370.
  • the coupling unit 364 includes a substrate 374 and a plurality of lead members 376 fixed to the substrate 374.
  • the coupling unit 362 is inserted into the through-hole 328e of the second case portion 316 and the through-hole 338e of the third case portion 318 whereas the coupling unit 364 is inserted into the through-hole 328f of the second case portion 316 and the through-hole 338f of the third case portion 318.
  • the lead member 366 is inserted into the through-hole 328g of the second case portion 316 and the through-hole 338g of the third case portion 318 whereas the lead member 368 is inserted into the through-hole 328h of the second case portion 316 and the through-hole 338h of the third case portion 318.
  • the lead members 366, 368, 372, 376 establish electrical connection of the batteries 90 in the first battery unit 24b with the batteries 90 in the second battery unit 26b. It should be noted here that the electrical connection between the first battery unit 24b and the second battery unit 26b may be series or parallel.
  • the first case portion 314 and the second case portion 316 are assembled with each other to house the first battery unit 24b. More specifically, the frame portion 322 of the first case portion 314 and the frame portion 326 of the second case portion 316 are assembled with each other with an annular water-tight seal 378 in between.
  • the third case portion 318 and the fourth case portion 320 are assembled with each other to house the second battery unit 26b. More specifically, the frame portion 336 of the third case portion 318 and the frame portion 346 of the fourth case portion 320 are assembled with each other with the annular water-tight seal 380 in between.
  • Nuts 382a, 382b, 382c, 382d are provided between the second case portion 316 and the third case portion 318.
  • the nut 382a is housed in the boss 328a of the second case portion 316 and the boss 338a of the third case portion 318.
  • the nut 382b is housed in the boss 328b of the second case portion 316 and the boss 338b of the third case portion 318.
  • the boss 328a and the boss 338a are assembled with each other with an annular water-tight seal 384a in between whereas the boss 328b and the boss 338b are assembled with each other with an annular water-tight seal 384b in between.
  • the nuts 382c, 382d are housed in the frame portion 332 of the second case portion 316 and the frame portion 342 of the third case portion 318.
  • the nut 382c is sandwiched by the boss 328c and the boss 338c whereas the nut 382d is sandwiched by the boss 328d and the bosses 338d.
  • the frame portion 332 and the frame portion 342 are assembled with each other with an annular water-tight seal 386 in between.
  • the frame portion 330 of the second case portion 316 and the frame portion 340 of the third case portion 318 are assembled with each other with the annular water-tight seal 388 in between.
  • the boss 328j in the second case portion 316 and the boss 338j of the third case portion 318 are fixed to each other with a fixing member 390a whereas the boss 328k and the boss 338k are fixed to each other with a fixing member 390b.
  • the fixing members 390a, 390b are each provided by screws. The same applies to fixing members 392a, 392b which will be described later.
  • the boss 334a (see Fig. 26) in the second case portion 316 and the boss 344a (see Fig. 26) of the third case portion 318 are fixed to each other with a fixing member 392a whereas the boss 334b and the boss 344b are fixed to each other with a fixing member 392b.
  • the first battery unit 24b and the second battery unit 26b are supported by the case 312 via a plurality of bolts 394.
  • four bolts 394 are inserted into the four bosses 324a in the first case portion 314, the four bosses 350a in the first battery unit 24b, and the bosses 328a, 328b, 328c, 328d in the second case portion 316.
  • bolts 394 are inserted into the four bosses 348a in the fourth case portion 320, the four bosses 356a in the second battery unit 26b, and the four bosses 338a, 338b, 338c, 338d in the third case portion 318. These bolts 394 have their tip portions fixed by the corresponding nuts 382a, 382b, 382c, 382d. This establishes connection between the first battery unit 24b, the second battery unit 26b and the case 312. It should be noted here that the four bosses 324a in the first case portion 314 and the four bosses 348a in the fourth case portion 320 may each be provided with water-tight seals.
  • the second case portion 316 and the third case portion 318 provide a space 396 penetrating the case 312 in the fore-aft direction at a center region or a substantially center region in the case 312.
  • the space 396 serves as a heat releasing space for releasing heat generated by the first battery unit 24b and the second battery unit 26b.
  • the space 396 will be called heat releasing space 396.
  • the heat releasing space 396 is a space outside of the case 312.
  • the first case portion 314, the frame portion 326 of the second case portion 316 and the heat releasing portion 328 of the second case portion 316 constitute a first storage portion Z1;
  • the heat releasing portion 338 of the third case portion 318, the frame portion 336 of the third case portion 318 and the fourth case portion 320 constitute a second storage portion Z2;
  • the frame portions 330, 332 of the second case portion 316 and the frame portions 340, 342 of the third case portion 318 constitute a coupling portion Z3.
  • the heat releasing space 396 is provided between the first storage portion Z1 and the second storage portion Z2.
  • the coupling units 362, 364 and the lead members 366, 368 constitute a connecting portion Z4.
  • the battery pack 10b has a service plug 398 which functions essentially in the same way as the service plug 148 (see Fig. 1). Also, though not elaborated any more nor shown in any of the drawings, the battery pack 10b includes a controller, a positive terminal (for discharging), a negative terminal, a positive terminal (for charging), a TXD terminal, and an RXD terminal functioning essentially in the same way as the controller 96 (see Fig. 10), the positive terminal 124, the negative terminal 144, the positive terminal 168, the TXD terminal 170, and RXD terminal 172 respectively.
  • the controller is provided in the first battery unit 24b for example.
  • the battery pack 10b can have a large energy capacity since it has the first battery unit 24b and the second battery unit 26b which are electrically connected to each other by the connecting portion Z4. Also, since the first battery unit 24b and the second battery unit 26b are disposed with the heat releasing space 396 in between, it is possible to reduce increase in the two-dimensional space needed for disposing a plurality of batteries 90. Heat generated in the first battery unit 24b is released from the heat releasing portion 324 of the first case portion 314 to the outside of the case 312, as well as from the heat releasing portion 328 of the second case portion 326 to the heat releasing space 396.
  • Heat generated in the first battery unit 26b is released from the heat releasing portion 348 of the fourth case portion 320 to the outside of the case 312, as well as from the heat releasing portion 338 of the third case portion 318 to the heat releasing space 396. As a result of these, it is possible to increase heat releasing ability of the battery pack 10b.
  • the first case portion 314 and the second case portion 316 are assembled with each other to form the first storage portion Z1 whereas the second case portion 316 and the third case portion 318 are assembled with each other to form the coupling portion Z3, and the third case portion 318 and the fourth case portion 320 are assembled with each other to form the second storage portion Z2. Also, as the second case portion 316 and the third case portion 318 are assembled with each other, the heat releasing space 396 is provided between the second case portion 316 and the third case portion 318. In this way, the case 312 can be obtained easily.
  • the first battery unit 24b and the second battery unit 26b are electrically connected to each other by the connecting portion Z4 which is housed inside the case 312.
  • the connecting portion Z4 which is housed inside the case 312.
  • the first battery unit 24b when the first battery unit 24b is viewed from a side (e.g., from the second storage portion Z2), part of the coupling portion Z3 overlaps with part of the first battery unit 24b.
  • the second battery unit 26b when the second battery unit 26b is viewed from a side (e.g., from the first storage portion Z1), part of the coupling portion Z3 overlaps with part of the second battery unit 26b.
  • part of the coupling portion Z3 overlaps with the first battery unit 24b
  • part of the coupling portion Z3 overlaps with the second battery unit 26b
  • part of the coupling portion Z3 is between the first battery unit 24b and the second battery unit 26b.
  • the coupling portion Z3 works for connecting the first storage portion Z1 and the second storage portion Z2, and also for guiding the connecting portion Z4 from the first storage portion Z1 to the second storage portion Z2. Therefore, in the battery pack 10b it is not necessary to provide arrangements to guide the connecting portion Z4 from the first storage portion Z1 to the second storage portion Z2 separately from the coupling portion Z3. As a result, it is possible to simplify the construction of the battery pack 10b.
  • a plurality of batteries 90 are disposed so that the batteries 90, even if not all of them, have their end surfaces oriented to the heat releasing space 396.
  • a plurality of batteries 90 are disposed so that the batteries 90, even if not all of them, have their end surfaces oriented to the heat releasing space 396.
  • the heat releasing space 396 space outside of the case 312 (the through-hole provided in the center region of the case 312 to penetrate the case 312 in the fore-aft direction) is utilized as the heat releasing space 396. Therefore, it is possible to release heat efficiently in the up-down direction via the heat releasing space 396.
  • the partitioning portion 328i is provided between the through-hole 328e and the through-hole 328f.
  • the partitioning portion 328i adds strength to the heat releasing portion 328 (especially to regions around the through-holes 328e, 328f), making it possible to improve rigidity of the second case portion 316.
  • the partitioning portion 338i is provided between the through-hole 338e and the through-hole 338f, making it possible to improve rigidity of the third case portion 318.
  • the battery pack 10b has a plurality of bosses 328j, 328k, 334a, 334b, 338j, 338k, 344a, 344b as fixing portions to fix the second case portion 316 and the third case portion 318 to each other. This ensures more reliable fixing of the second case portion 316 and the third case portion 318 while improving rigidity of the case 312.
  • the bosses 328j, 328k , 338j, 338k serving as fixing portions are provided inside the coupling portion Z3 (more specifically inside the frame portion 332, 342).
  • the boss 328j and the boss 338j nor between the boss 328k and the bosses 338k. Therefore, it is possible to improve rigidity of the case 312 while eliminating a risk of reduced water-tightness.
  • the lead members are provided by lead plates.
  • the lead members may be provided by other electrically conductive members (e.g., lead wires).
  • a solid coupling portion may provide simple physical connection between the first storage portion and the second storage portion.
  • the connecting portion which provides electrical connection between the first battery unit and the second battery unit, has its part routed outside the case for example.
  • the present invention is applied to battery packs which include two battery units (the first battery unit and the second battery unit).
  • the present invention is applicable to battery packs which include three or more battery units.
  • the battery pack further includes a third storage portion for housing the third battery unit; a coupling portion connecting the third storage portion with the first storage portion or the second storage portion; and a connecting portion electrically connecting the third battery unit with the first battery unit or the second battery unit.
  • the present invention requires that at least part of the coupling portion overlaps with the first battery unit and the second battery unit, including the case where the coupling portion overlaps entirely with the first battery unit and the second battery unit.
  • the battery packs described thus far are suitably applicable to saddle type vehicles.
  • description will cover a case where the battery pack 10 described earlier is utilized in an electric motorcycle 400 as an example of saddle type vehicles.
  • Fig. 27 is a side view of the electric motorcycle 400.
  • the electric motorcycle 400 includes a motorcycle frame 402.
  • the motorcycle frame 402 includes a head pipe 404; a pair of front frames 406 extending from the head pipe 404 in obliquely rearward and downward directions; and a pair of rear frames 408 connected with a rear portion of the front frame 406 and erected in obliquely rearward and upward directions.
  • the front frames 406 are disposed side by side in the left-right direction
  • the rear frames 408 are disposed side by side in the left-right direction.
  • Fig. 27 shows only one front frame 406 of the pair of front frames 406, and only one rear frame 408 of the pair of rear frames 408.
  • a steering shaft 410 is pivotably inserted through the head pipe 404.
  • the steering shaft 410 has an upper end mounted with a handlebar supporting portion 412.
  • a handlebar 414 is fixed to the handlebar supporting portion 412.
  • the steering shaft 410 has a lower end mounted with a front fork 416.
  • a front wheel 418 is rotatably mounted to lower ends of the front fork 416.
  • the front frames 406 have rear end portions, to which a fore end portion of a rear arm 422 is mounted via pivot shaft 420, so that the rear arm 422 is pivotable thereto.
  • the rear arm 422 has a rear end portion 422a, which incorporates an electric motor 424 of an axial gap type for example.
  • the electric motor 424 is connected with a rear wheel 426 thereby rotating the rear wheel 426.
  • the rear arm 422 incorporates a drive unit 428.
  • the battery pack 10 is provided between the rear frames 408, and a seat 430 is provided above the battery pack 10.
  • the battery pack 10 is electrically connected to the electric motor 424 and the drive unit 428.
  • electric power is provided from the battery pack 10 to the electric motor 424 and the drive unit 428, so that the electric motor 424 and the drive unit 428 are operated.
  • the drive unit 428 controls rotating drive of the electric motor 424. Thus, movement of the electric motorcycle 400 is controlled.
  • the battery pack 10 according to the present invention can provide a large amount of energy yet it has a high heat releasing ability and requires only a small two-dimensional space for disposing a plurality of batteries. Therefore, the battery pack 10, which has a high heat releasing ability and sufficient energy storage, can be installed easily in the electric motorcycle 400 which is limited in battery pack installation space. This makes it possible to improve travelling performance in the electric motorcycle 400.
  • the battery pack 10a and the battery pack 10b are also mountable to electric motorcycles.
  • the saddle type vehicle to which the present invention is applicable is not limited to the electric motorcycle 400 described above. Specifically, the present invention is applicable to various kinds of saddle type vehicles including scooters, all-terrain vehicles, snowmobiles and others.
  • the battery pack according to the present invention is suitably applicable not only to saddle type vehicles but also to various kinds of electric vehicles.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

La présente invention concerne un bloc-batterie (10) comprenant un boîtier (12) et une unité batterie (22) logée dans le boîtier (12). Le boîtier (12) comprend une première partie de stockage X1, une seconde partie de stockage X2 et une partie d'accouplement X3. La première partie de stockage X1 et la seconde partie de stockage X2 présentent un espace de dégagement de chaleur (84) entre elles. L'unité batterie (22) comprend une première unité batterie (24) et une seconde unité batterie (26). La première unité batterie (24) est logée dans la première partie de stockage X1 et la seconde unité batterie (26) est logée dans la seconde partie de stockage X2. La première unité batterie (24) et la seconde unité batterie (26) sont électriquement raccordées l'une à l'autre par une partie de raccordement X4. La chaleur produite dans la première unité batterie (24) et dans la seconde unité batterie (26) est dégagée en direction de l'espace de dégagement de chaleur (84).
PCT/JP2011/006468 2010-11-22 2011-11-21 Bloc-batterie pour véhicule de type à selle et véhicule de type à selle Ceased WO2012070220A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11796837.0A EP2643871A1 (fr) 2010-11-22 2011-11-21 Bloc-batterie pour véhicule de type à selle et véhicule de type à selle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-260203 2010-11-22
JP2010260203A JP2013232280A (ja) 2010-11-22 2010-11-22 鞍乗型車両の電池パックおよび鞍乗型車両

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WO2012070220A1 true WO2012070220A1 (fr) 2012-05-31

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EP (1) EP2643871A1 (fr)
JP (1) JP2013232280A (fr)
TW (1) TWI491535B (fr)
WO (1) WO2012070220A1 (fr)

Cited By (8)

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US20150122563A1 (en) * 2013-11-06 2015-05-07 Yamaha Hatsudoki Kabushiki Kaisha Battery and saddle-type electric vehicle equipped therewith
WO2015124989A1 (fr) * 2014-02-20 2015-08-27 Toyota Jidosha Kabushiki Kaisha Module de batterie
US9327586B2 (en) 2013-11-06 2016-05-03 Yamaha Hatsudoki Kabushiki Kaisha Saddle-type electric vehicle
US9346421B2 (en) 2013-11-06 2016-05-24 Yamaha Hatsudoki Kabushiki Kaisha Saddle-type electric vehicle
US9545968B2 (en) 2013-11-06 2017-01-17 Yamaha Hatsudoki Kabushiki Kaisha Saddle-type electric vehicle
WO2018165268A1 (fr) * 2017-03-09 2018-09-13 Science Applications International Corporation Ensemble batterie
AT17992U1 (de) * 2021-02-16 2023-10-15 Mxm S R O Elektrisches Motorrad
US12485981B2 (en) 2021-03-24 2025-12-02 Polaris Industries Inc. Electric recreational vehicle

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JP6282510B2 (ja) * 2014-03-28 2018-02-21 日立オートモティブシステムズ株式会社 蓄電装置
JP6997325B2 (ja) * 2018-08-10 2022-01-17 本田技研工業株式会社 電池モジュールおよび電池パック
WO2021214904A1 (fr) * 2020-04-22 2021-10-28 ヤマハ発動機株式会社 Bloc-batterie de véhicule électrique et véhicule électrique pur
WO2021214903A1 (fr) * 2020-04-22 2021-10-28 ヤマハ発動機株式会社 Bloc-batterie de véhicule électrique, et véhicule électrique pur
DE112021002473T5 (de) 2020-04-22 2023-02-02 Yamaha Hatsudoki Kabushiki Kaisha Spreizsitzfahrzeug-Batteriesatz und Spreizsitzfahrzeug
DE112021002462T5 (de) 2020-04-22 2023-02-09 Yamaha Hatsudoki Kabushiki Kaisha Spreizsitzfahrzeug-Batteriesatz und Spreizsitzfahrzeug
EP4399763A4 (fr) 2021-09-10 2025-07-09 Milwaukee Electric Tool Corp Bloc-batterie

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WO2007066919A1 (fr) * 2005-12-08 2007-06-14 Lg Chem, Ltd. Entretoise pouvant etre assemblee pour la realisation d'un module de batterie
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Publication number Priority date Publication date Assignee Title
US20150122563A1 (en) * 2013-11-06 2015-05-07 Yamaha Hatsudoki Kabushiki Kaisha Battery and saddle-type electric vehicle equipped therewith
US9327586B2 (en) 2013-11-06 2016-05-03 Yamaha Hatsudoki Kabushiki Kaisha Saddle-type electric vehicle
US9346421B2 (en) 2013-11-06 2016-05-24 Yamaha Hatsudoki Kabushiki Kaisha Saddle-type electric vehicle
US9545968B2 (en) 2013-11-06 2017-01-17 Yamaha Hatsudoki Kabushiki Kaisha Saddle-type electric vehicle
US9660236B2 (en) * 2013-11-06 2017-05-23 Yamaha Hatsudoki Kabushiki Kaisha Battery and saddle-type electric vehicle equipped therewith
WO2015124989A1 (fr) * 2014-02-20 2015-08-27 Toyota Jidosha Kabushiki Kaisha Module de batterie
CN106030854A (zh) * 2014-02-20 2016-10-12 丰田自动车株式会社 电池模块
CN106030854B (zh) * 2014-02-20 2018-09-25 丰田自动车株式会社 电池模块
WO2018165268A1 (fr) * 2017-03-09 2018-09-13 Science Applications International Corporation Ensemble batterie
US10581034B2 (en) 2017-03-09 2020-03-03 Science Applications International Corporation Battery assembly
AT17992U1 (de) * 2021-02-16 2023-10-15 Mxm S R O Elektrisches Motorrad
US12485981B2 (en) 2021-03-24 2025-12-02 Polaris Industries Inc. Electric recreational vehicle

Also Published As

Publication number Publication date
TW201233585A (en) 2012-08-16
EP2643871A1 (fr) 2013-10-02
TWI491535B (zh) 2015-07-11
JP2013232280A (ja) 2013-11-14

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