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WO2019069838A1 - Structure stratifiée de modules de stockage d'énergie - Google Patents

Structure stratifiée de modules de stockage d'énergie Download PDF

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Publication number
WO2019069838A1
WO2019069838A1 PCT/JP2018/036640 JP2018036640W WO2019069838A1 WO 2019069838 A1 WO2019069838 A1 WO 2019069838A1 JP 2018036640 W JP2018036640 W JP 2018036640W WO 2019069838 A1 WO2019069838 A1 WO 2019069838A1
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WO
WIPO (PCT)
Prior art keywords
storage module
battery module
fixing member
hole
claws
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/JP2018/036640
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English (en)
Japanese (ja)
Inventor
浩 星
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.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems 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 Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Publication of WO2019069838A1 publication Critical patent/WO2019069838A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • 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 storage module stack structure.
  • a structure in which a conductive collar having a hollow cylindrical shape is inserted into the through hole of each battery module, and a through bolt is inserted into the hollow portion of the conductive collar.
  • the conductive collar is buckled and expanded at the axial center, and has a centering effect when tightening with a through bolt.
  • the conductive collar has a height substantially the same as the height of the battery module, and is inserted into one battery module, and the battery module contacts the top surface of the lower battery module with the bottom surface of the upper battery module. And laminated (see, for example, Patent Document 1).
  • the wiring harnesses for connecting the battery modules or between the battery modules and the power supply or control unit are routed through the gaps between the battery modules to be stacked, and between the battery modules There are cases where it does not pass through the gap.
  • the distance between the battery modules to be stacked can not be adjusted.
  • the storage module stack structure is stacked opposite to each other, and the first storage module and the second storage module each storing a storage cell therein, and the first storage module.
  • a fixing member provided between the module and the second power storage module, the fixing member including a base portion interposed between the first power storage module and the second power storage module; It has a regulation part which regulates movement in the direction orthogonal to the lamination direction of the 1st storage module and the 2nd storage module.
  • the distance between the stacked power storage modules can be adjusted by using the fixing members having different thicknesses of the base portions.
  • the disassembled perspective view of the battery module laminated structure shown in FIG. FIG. 2 is an external perspective view of the battery module shown in FIG. 1;
  • the disassembled perspective view of the battery module shown in FIG. FIG. 6 is a cross-sectional view of the battery module laminated structure shown in FIG. 1 along the line VI-VI.
  • the figure before the assembly of the battery module laminated structure shown in FIG. FIG. 3 is an external perspective view of a fixing member illustrated in FIG.
  • FIG. 10 is a perspective view of a state in which a part of the fixing member shown in FIG. 9 is cut away.
  • the external appearance perspective view which shows 3rd Embodiment of the battery module laminated structure of this invention.
  • the disassembled perspective view of the battery module laminated structure shown in FIG. The external appearance perspective view of the fixing member shown in FIG.
  • the XIV-XIV sectional view taken on the line of the battery module laminated structure shown in FIG.
  • the disassembled perspective view which shows 4th Embodiment of the battery module laminated structure of this invention.
  • FIG. 1 is an external perspective view of a battery module stack structure 1
  • FIG. 2 is an exploded perspective view of the battery module stack structure 1 shown in FIG.
  • the battery module stack structure 1 includes a plurality of battery modules 10, a fixing member 30, a fastening member 81, and a lower case 60.
  • the plurality of battery modules 10 are stacked with the fixing members 30 therebetween, and fixed by the fastening members 81 in the stacking direction and the direction orthogonal to the stacking direction.
  • the battery module stack structure 1 is illustrated as a structure in which two battery modules 10 are stacked, but the number of battery modules 10 to be stacked is not limited to two, and three or more optional It can be a number.
  • Each battery module 10 has a substantially rectangular parallelepiped holding case 100, and a substantially cylindrical boss 110 extending in the height direction is formed at each of the four corners of the holding case 100. . As illustrated in FIG. 2, a through hole 111 is formed at the center of the boss portion 110.
  • Four fixing members 30 are disposed between the battery modules 10 disposed one above the other. Each fixing member 30 has a through hole 34 at the center, and is arranged such that the through hole 34 is coaxial with the through hole 111 of the boss 110. Although the details will be described later, the fixing member 30 has a structure fitted to the boss portion 110.
  • the fastening member 81 is a bolt having a head portion 82 and an externally threaded portion 83 formed on the distal end side.
  • the lower case 60 is disposed on the lower side of the lower battery module 10. A nut 61 is welded to the lower surface of the lower case 60, that is, the surface opposite to the side facing the battery module 10.
  • the through holes 111 of the respective battery modules 10 and the through holes 34 of the fixing member 30 are coaxially disposed, and the fastening members 81 are the through holes 111 of the respective battery modules 10 and the fixing member 30. And the through hole 34 of the above. Then, the male screw portion 83 of the fastening member 81 is fastened to the female screw portion of the nut 61 of the lower case 60. As a result, the two battery modules 10 stacked vertically are restricted in movement in the vertical direction and movement in the direction orthogonal to the vertical direction, and are fixed in a stacked state.
  • FIG. 3 is an external perspective view of the battery module shown in FIG. 1
  • FIG. 4 is a perspective view with the insulating cover of the battery module shown in FIG. 3 removed
  • FIG. 5 is an exploded view of the battery module shown in FIG. It is a perspective view.
  • Battery module 10 includes a plurality of cylindrical secondary battery cells 21 (see FIG. 5), a plurality of bus bars 22, a holding case 100 accommodating a plurality of secondary battery cells 21, and a pair of left and right voltage detection units 23. , 24 and an insulating cover 25 (see FIG. 3).
  • the voltage detection units 23, 24 are covered with an insulating cover 25.
  • the secondary battery cell 21 is a cylindrical secondary battery cell, and has a positive electrode 21 a at one end in the axial direction and a negative electrode 21 b at the other end.
  • the plurality of secondary battery cells 21 are arranged in upper and lower two stages at a predetermined pitch with the axial direction parallel.
  • the plurality of secondary battery cells 21 on the upper side are all disposed with the positive electrode 21 a facing the front side (the front side).
  • the plurality of secondary battery cells 21 on the lower side are all disposed with the negative electrode 21b facing the front side. That is, the secondary battery cells 21 on the upper side and the lower side are arranged with the positive electrode 21 a and the negative electrode 21 b facing the opposite side in the axial direction.
  • the secondary battery cells 21 on the upper side and the secondary battery cells 21 on the lower side are arranged at a half pitch offset in the arrangement direction.
  • the holding case 100 includes three members, a lower holding case 101, a middle holding case 102, and an upper holding case 103.
  • the lower holding case 101 and the middle holding case 102 sandwich and hold the plurality of secondary battery cells 21 on the lower side
  • the middle holding case 102 and the upper holding case 103 sandwich the plurality of secondary battery cells 21 on the upper side Do.
  • the lower holding case 101, the middle holding case 102, and the upper holding case 103 are formed of, for example, an insulating resin such as PBT (polybutylene terephthalate).
  • each bus bar 22 connects the positive electrode 21 a and the negative electrode 21 b of the pair of secondary battery cells 21 arranged obliquely in the direction.
  • the positive electrode 21a1 of the leftmost secondary battery cell 21 on the upper side is connected to the positive electrode terminal plate 26a
  • the negative electrode 21b1 of the rightmost secondary battery cell 21 on the lower side is connected to the negative terminal plate 26b.
  • all the secondary battery cells 21 between the positive electrode terminal plate 26a and the negative electrode terminal plate 26b accommodated in the holding case 100 of the battery module 10 are electrically connected in series.
  • the bus bar 22 and the positive electrode 21a or the negative electrode 21b of the secondary battery cell 21, the positive electrode terminal plate 26a, the positive electrode 21a1, the negative electrode terminal plate 26b, and the negative electrode 21b1 are joined by, for example, welding or laser beam.
  • a voltage detection unit 23 is disposed in front of the plurality of bus bars 22 on the front side (front side of the holding case 100 in FIG. 5) connecting the upper and lower secondary battery cells 21 (front side in FIG. 5).
  • a voltage detection unit 24 is disposed behind the plurality of bus bars 22 on the rear side connecting the secondary battery cells 21.
  • the voltage detection units 23 and 24 have a voltage detection circuit that detects the voltage of the cylindrical secondary battery cell 21.
  • the voltage detection units 23 and 24 have the same structure, and each include a circuit board 121, a fuse 122, a connector 123, and a connection conductor 124.
  • the circuit board 121 has a constant width, and has a strip shape extending along the longitudinal direction of the holding case 100.
  • a wiring pattern (not shown) is formed on the opposite side of the bus bar 22 in the circuit board 121, and the connector 123 and the fuse 122 are soldered to the connection pads of the wiring pattern whose terminals are formed on the circuit board 121. Connected by The connector 123 is connected to a connection member for connecting to the voltage detection circuit.
  • the fuse 122 has a function of interrupting the circuit when the secondary battery cells 21 are shorted. That is, the fuse 122 is melted at the time of a short circuit to prevent a large current from flowing to the control unit, thereby preventing smoke and ignition from the connector 123 or the voltage detection line.
  • the bus bar 22 has a pair of battery junctions 22 a joined to the secondary battery cells 21 and an intermediate portion 22 b connecting the battery junctions 22 a.
  • a fixing hole 22c is formed in the middle portion 22b.
  • the connection conductor 124 is provided with a connection hole 124 a.
  • the screw 51 is inserted through the connection hole 124 a of the connection conductor 124 and the fixing hole 22 c of the bus bar 22, and the screw 51 is fastened to a female screw formed substantially at the center of the boss 52 of the holding case 100. That is, the connection conductor 124 and the bus bar 22 are tightened together by the screw 51 and electrically conducted.
  • a nut (not shown) is welded to the back surface side of the positive electrode terminal plate 26 a, and a fixing ring 125 connected to the connection conductor 124 is provided on the circuit board 121.
  • the screw 51 a is inserted into the through hole of the positive electrode terminal plate 26 a and fastened to the nut of the fixing ring 125.
  • the positive electrode terminal plate 26 a is fixed to the circuit board 121 and electrically connected to the connection conductor 124.
  • the negative electrode terminal plate 26 b is fastened to the connection conductor 124 by the screw 51 b and fixed to the holding case 100.
  • the circuit board 121 is fixed to the boss portion 53 of the holding case 100 by the screw 54. Thereby, the voltage detection units 23 and 24 are fixed to the holding case 100. As described above, the voltage detection units 23 and 24 are covered by the insulating cover 25 fixed to the holding case 100, and insulation protection of conductor portions such as the connection conductor 124 is achieved.
  • FIG. 6 is a cross-sectional view taken along line VI-VI of the battery module stack structure shown in FIG. 1, and FIG. 7 is a view before assembly of the battery module stack structure shown in FIG.
  • substantially cylindrical bosses 110a each having a through hole 111a at the axial center are formed.
  • substantially cylindrical bosses 110b each having a through hole 111b formed at an axial center are formed.
  • substantially cylindrical bosses 110c having a through hole 111c formed at the axial center are formed.
  • Projections of the bosses 110a, 110b, 110c and the through holes 111a, 111b, 111c on the plane in the direction orthogonal to the stacking direction of the battery module 10 are formed at the same position and the same size. Therefore, when the lower holding case 101, the middle holding case 102, and the upper holding case 103 are stacked, as shown in FIG. 6, the boss portion 110 in which the boss portions 110a, 110b and 110c are stacked continuously in the vertical direction It is formed. Further, the through holes 111a, 111b, and 111c are continuous in the vertical direction, and the through holes 111 are formed.
  • FIG. 8 is an external perspective view of the fixing member 30 illustrated in FIG.
  • the fixing member 30 has a base portion 31, a pair of claw portions 32 projecting to one surface side of the base portion 31, and a pair of claw portions 33 projecting to the other surface side of the base portion 31.
  • the fixing member 30 is formed by press processing, and the base portion 31 and the claw portions 32 and 33 have uniform thickness (axial length). All the claws 32 and 33 have the same width (length in the circumferential direction).
  • a through hole 34 is formed in the central portion of the base portion 31.
  • the pair of claw portions 32 are bent substantially perpendicularly to the base portion 31, and are provided opposite to each other on the outer periphery of the base portion 31, in other words, every 180 ° in the circumferential direction.
  • the pair of claws 32 passes through the center of the through hole 34 and is disposed in line symmetry with a straight line orthogonal to the straight line connecting the centers of the pair of claws 32.
  • the pair of claws 33 are bent substantially perpendicularly to the base 31 opposite to the protruding direction of the claws 32 and face each other on the outer periphery of the base 31, in other words, the circumference It is provided every 180 ° in the direction. That is, the pair of claws 33 passes through the center of the through hole 34 and is disposed in line symmetry with a straight line orthogonal to a straight line connecting the centers of the pair of claws 33.
  • the claw portions 32 and the claw portions 33 are alternately arranged at equal intervals along the outer periphery of the base portion 31 so as to be positioned in the middle of each other in the circumferential direction.
  • the claws 32 and the claws 33 are alternately arranged at every 90 ° in the circumferential direction. Therefore, the pair of claws 32 and the pair of claws 33 are disposed at positions where the projections projected on a plane parallel to the base 31 do not overlap.
  • the distance between the facing surfaces of the pair of claws 32 and the distance between the facing surfaces of the pair of claws 33 are formed to such a size that the outer shape of the boss 110 can be fitted.
  • the method of assembling the battery module 10 of the upper and lower sides, and producing the battery module laminated structure 1 is demonstrated.
  • the method of assembling the battery module 10 is the same at any corner of the holding case 100 in the battery module 10. Referring to FIGS. 6 and 7, the method of assembling the battery case at one corner is the same. explain.
  • four fixing members 30 are disposed between the upper battery module 10 and the lower battery module 10.
  • the fixing member 30 has the base portion 31 substantially parallel to the direction orthogonal to the stacking direction of the battery modules 10, and is disposed at a position where the center thereof is coaxial with the boss portion 110 of each of the battery modules 10.
  • the pair of claws 32 project from the base 31 toward the upper side of the battery module 10.
  • the pair of claws 33 project from the base 31 toward the lower side of the battery module 10.
  • the pair of claws 33 of the fixing member 30 is fitted to the boss 110 (the boss 110 c of the upper holding case 103) of the holding case 100 in the lower battery module 10, and the pair of claws 32 of the fixing member 30 is located above
  • the boss 110 (the boss 110 a of the lower holding case 101) of the holding case 100 in the battery module 10 is fitted.
  • the axial center of the fixing member 30, that is, the center of the through hole 34 is substantially coaxial with the axial center of the boss 110.
  • the fastening member 81 is inserted into the through hole 111 of the holding case 100 in the upper battery module 10, the through hole 34 of the fixing member 30 and the through hole 111 of the holding case 100 in the lower battery module 10, , And the female screw portion of the nut 61 provided in the lower case 60. This state is shown in FIG. Thereby, the battery module laminated structure 1 is produced.
  • the upper battery module 10 and the lower battery module 10 are fixed immovably in the vertical direction, that is, in the stacking direction via the fixing member 30. Further, the movement of the upper battery module 10 in the direction orthogonal to the stacking direction is restricted by the pair of claws 32 of the fixing member 30, and the lower battery module 10 is laminated by the pair of claws 33 of the fixing member 30. Movement in the direction orthogonal to the direction is restricted. That is, the pair of claw portions 32 and the pair of portions 33 have a function as a restricting portion that restricts the movement of the upper and lower battery modules 10 in the direction orthogonal to the stacking direction.
  • the distance (interval) between the battery modules 10 is obtained by changing the thickness (axial length) t (see FIG. 6) of the base portion 31 of the fixing member 30. )
  • the fixing member 30 is small in size and simple in structure and can be formed by press processing, it can be manufactured at low cost.
  • the fixing member 30 illustrated as a structure which has a pair of nail
  • two or more pairs of claws 32 and 33 may be provided. Even in the structure in which two or more pairs of the claws 32 and 33 are provided, it is preferable to arrange the claws 32 and 33 at the same angle in the circumferential direction. Further, it is preferable that the claws 32 protruding to one surface of the base 31 and the claws 33 protruding to the other surface of the base 31 be alternately arranged on the outer peripheral side of the base 31.
  • the plurality of claws 32 and the plurality of claws 33 are preferably arranged in line symmetry with respect to a straight line passing through the center of the through hole 34.
  • the plurality of claws 32 or the plurality of claws 33 do not have to be arranged so as to be all paired.
  • the number of the claws 32 or the claws 33 is not limited to an even number, and may be an odd number.
  • the width of each claw portion 32 or each claw portion 33 in other words, the circumferential length may not be the same but may be different.
  • the total number of the claws 32 projecting to the one surface side of the base portion 31 may be different from the total number of the claws 33 projecting to the other surface side of the base portion 31.
  • the battery module stack structure 1 includes the fixing member 30 provided between the first battery module 10 and the second battery module 10, and the fixing member 30 includes the first battery module 10 and the first battery module 10.
  • the interval between the battery modules 10 to be stacked can be adjusted by using the fixing members 30 having different thicknesses of the base portion 31.
  • the first battery module 10 has a convex boss 110 protruding toward the second battery module 10, and the second battery module 10 protrudes toward the first battery module 10.
  • the fixing member 30 is fitted to the lower end portion of the boss portion 110 of the first battery module 10 and the upper end portion of the boss portion 110 of the second battery module 10. As assembling of the fixing member 30 and the boss portion 110 only involves fitting the claws (regulating portions) 32 and 33 of the fixing member 30 to the boss portion 110, the assembling operation can be efficiently performed. .
  • the restricting portion that restricts the movement of the first and second battery modules 10 in the direction orthogonal to the stacking direction is disposed on the outer peripheral side of the boss 110 of one of the battery modules 10.
  • the claw portion 32 protruding toward the one battery module 10 side and the claw portion disposed on the outer peripheral side of the boss portion 110 of the other battery module 10 and protruding from the base portion 31 toward the second battery module 10 side And 33.
  • the restricting portion that restricts the movement of the first and second battery modules 10 in the direction orthogonal to the stacking direction has a simple structure in which the claws 32 and 33 are disposed on the outer peripheral side of the boss 110. Ru.
  • the regulation structure which regulates movement in the direction orthogonal to the stacking direction of the first and second battery modules 10 can be made simple and inexpensive.
  • the plurality of claws 32 and the plurality of claws 33 are flat in a plane parallel to the base 31, that is, a plane perpendicular to the stacking direction of the battery module 10.
  • the projections projected onto are arranged at positions where they do not overlap.
  • the fixing member 30 is small in size and simple in structure, and can be manufactured, for example, by press processing. For this reason, the fixing member 30 can be manufactured inexpensively.
  • the base portion 31 of the fixing member 30 has the through holes 34, and the boss portions 110 of the first and second battery modules 10 have the through holes 111, and furthermore, the through holes 34 of the base portion 31.
  • the fastening member 81 which penetrates each through-hole 111 of each boss
  • FIG. 9 is an exploded perspective view showing a second embodiment of the battery module stack structure 1 of the present invention
  • FIG. 10 is a perspective view of a state in which a part of the fixing member 30A shown in FIG. .
  • the fastening member 81 and the lower case 60 are not shown.
  • the fixing member 30A in the second embodiment has a cylindrical shape.
  • the fixing member 30A has a cylindrical outer peripheral side portion 35 and a base portion 31a provided so as to connect the outer peripheral side portion 35 in the axial direction. .
  • a through hole 34 is formed at the center of the base portion 31a.
  • the inner diameter of the outer peripheral side portion 35 is sized to fit the boss portion 110 of the holding case 100 in the battery module 10.
  • the fixing member 30A is formed of, for example, a resin mold. However, it may be formed of metal.
  • the battery module 10 has the same structure as that of the first embodiment, and the corresponding members are denoted by the same reference numerals and the description thereof will be omitted.
  • the fixing member 30A is disposed between the upper battery module 10 and the lower battery module 10.
  • the boss 110 (the boss 110 c of the upper holding case 103) of the holding case 100 of the lower battery module 10 is fitted to the lower side than the base 31 a of the outer peripheral side 35 of the fixing member 30 ⁇ / b> A. Further, the boss 110 (the boss 110a of the lower holding case 101) of the holding case 100 of the upper battery module 10 is fitted inward of a portion above the base 31a in the outer peripheral side 35 of the fixing member 30A. .
  • the axial center of the fixing member 30A that is, the center of the through hole 34 is substantially coaxial with the boss 110.
  • the inner peripheral tapered surfaces 35a provided at the upper and lower end portions of the fixing member 30A serve as guides for fitting the bosses 110 of the holding case 100 of the upper and lower battery modules 10 into the fixing member 30A.
  • the fastening member 81 is inserted into the through hole 111 of the holding case 100 of the upper battery module 10, the through hole 34 of the fixing member 30, and the lower battery module, as in the first embodiment.
  • the through hole 111 of the holding case 100 is inserted, and the male screw portion 83 of the fastening member 81 is fastened to the nut 61.
  • the upper battery module 10 and the lower battery module 10 are fixed immovably in the vertical direction, that is, in the stacking direction via the fixing member 30A interposed between the upper battery module 10 and the lower battery module 10 Be done.
  • the movement of the upper and lower battery modules 10 in the direction orthogonal to the stacking direction is restricted by the outer peripheral side portion 35 of the fixing member 30A. That is, the outer peripheral side portion 35 in the second embodiment has a function as a restricting portion that restricts the movement of the upper and lower battery modules 10 in the direction orthogonal to the stacking direction.
  • the battery module stack structure 1 shown in the second embodiment can change the distance between the battery modules 10 by using the fixing members 30A having different thicknesses of the base portions 31a. Therefore, also in the second embodiment, the same effects as the effects (1) to (3) and (5) of the first embodiment can be obtained. However, in the second embodiment, the claws 32 and 33 in the first embodiment are replaced with the outer peripheral side portion 35. Further, in the second embodiment, since the fixing member 30A can be formed by resin molding, the fixing member 30A can be manufactured at low cost.
  • FIG. 11 is an appearance perspective view showing a third embodiment of a battery module stack structure of the present invention
  • FIG. 12 is an exploded perspective view of the battery module stack structure shown in FIG.
  • FIG. 13 is an external perspective view of the fixing member shown in FIG.
  • FIG. 14 is a cross-sectional view taken along line XIV-XIV of the battery module stack structure shown in FIG. 11, and
  • FIG. 15 is a view before assembly of the battery module stack structure shown in FIG.
  • the fixing member 30B according to the third embodiment, as illustrated in FIG. 13, includes a base portion 31b, a shaft-like portion 36 having a circular cross section protruding above the base portion 31b, and a cross section protruding below the base portion 31b. And a circular shaft 37.
  • the shaft-like portion 36 and the shaft-like portion 37 are formed in line symmetry about the base portion 31 b. However, it is not always necessary to make the shaft-like portion 36 and the shaft-like portion 37 in line symmetry.
  • a tapered portion 36 a and a flat portion 36 b are formed in the upper portion of the shaft portion 36, and a tapered portion 37 a and a flat portion 37 b are formed in the lower portion of the shaft portion 37.
  • the outer diameters of the shaft-like portions 36 and 37 are set to sizes that can be fitted in the through holes 111 of the boss portion 110 of the holding case 100 in the battery module 10.
  • the fixing member 30B is formed of, for example, a resin mold. However, it may be formed of metal.
  • the fixing member 30 ⁇ / b> B is disposed between the lower battery module 10 and the upper battery module 10. Then, the shaft-like portion 37 of the fixing member 30 b is fitted in the through hole 111 of the boss 110 (the boss 110 c of the upper holding case 103) of the lower battery module 10. Further, the shaft-like portion 36 of the fixing member 30 b is fitted in the through hole 111 of the boss 110 (the boss 110 a of the lower holding case 101) of the holding case 100 in the upper battery module 10. This state is illustrated in FIG.
  • the tapered portions 36a, 37a of the shaft-like portions 36, 37 of the fixing member 30B fit the shaft-like portions 36, 37 of the fixing member 30B into the through holes 111 of the bosses 110 of the holding case 100 in the upper and lower battery modules 10. It will be a guide for
  • the heights (lengths in the vertical direction) of the shaft-like portions 36 and 37 of the fixing member 30B are respectively smaller than the height of the battery module 10. Therefore, the through holes 111 formed in the battery module 10 can also be recessed portions deeper than the lengths of the shaft-like portions 36, 37.
  • the movement of the upper and lower battery modules 10 in the direction orthogonal to the stacking direction is restricted by the axial portions 36 and 37 of the fixing member 30B. That is, the shaft-like parts 36 and 37 in the third embodiment have a function as a restricting part that restricts the movement of the upper and lower battery modules 10 in the direction orthogonal to the stacking direction.
  • the fastening member 81 such as a bolt can not be inserted into the through hole 111 of the boss 110 of the battery module 10 in which the fixing member 30B is fitted. For this reason, unlike the first and second embodiments, it is necessary to adopt another fixing structure.
  • a boss portion in which a through hole for inserting a fastening member 81 such as a bolt is formed 10 has a separate method. Alternatively, as shown by a dotted line in FIG.
  • the fastening member 85 having the engaging portion 84 engaged with the through hole 111 of each boss portion 110 of the holding case 100 in the upper battery module 10 is used as a through hole of the lower case 60. It is also possible to have a structure in which it is inserted and fastened by a nut 62 at the lower end side. Further, the fixing member 30B may be modified as follows.
  • FIG. 16 is a cross-sectional view of Modification 1 of the fixing member as the third embodiment shown in FIG.
  • the fixing member 30B1 illustrated in FIG. 16 has a structure in which a through hole 36c penetrating in the axial direction is formed in the fixing member 30B illustrated in FIG. That is, in the fixing member 30B1, a through hole 36c penetrating the base portion 31b and the shaft-like portions 36, 37 is provided at the axial center. Therefore, a fastening member 81 such as a bolt is inserted into the through hole 36c to fix the stacked battery modules 10 via the fixing member 30B1 to the lower case 60 as in the first and second embodiments. Can.
  • Fixing member 30B1 can also be produced by resin mold.
  • FIG. 17 is a cross-sectional view of a second modification of the fixing member as the third embodiment shown in FIG.
  • a fastening shaft portion 36d having a male screw portion 36e at an end portion is formed.
  • a fastening shaft portion 37d having a male screw portion 37e at an end portion is formed. Therefore, the male screw portion 37e which penetrates the through hole 111 of the boss portion 110 of the lower battery module 10 through the fastening shaft portion 37d, and the nut 62 (see FIG.
  • a nut 62 (not shown) is fastened to the male screw portion 36e which penetrates the through hole 111 of the boss portion 110 of the holding case 100 in the battery module 10 above and fastens the fastening shaft 36d.
  • the battery module 10 can be fixed.
  • fixing member 30B2 in order to produce fixing member 30B2, you may shape
  • the fixing member 30B2 may be formed by insert molding using the fastening shaft portions 36d and 37d as metal.
  • the fastening shaft portions 36d and 37d of the fixing member 30B may be manufactured as separate members from the fixing member 30B shown in FIG. 13, and both members may be assembled to manufacture the fixing member 30B2.
  • female screw portions are formed on the shaft portions 36 and 37 of the fixing member 30B, and male screws are provided to the fastening shaft portions 36d and 37d. It can be formed in part and fixed by screwing or integrated by welding.
  • the fixing members 30, 30B1, and 30B2 can be manufactured by molding (including insert molding), and can be inexpensive.
  • FIG. 18 is an exploded perspective view showing a fourth embodiment of a battery module laminated structure 1 of the present invention.
  • the battery module stack structure 1 is exemplified as the battery module 10 in which the cylindrical secondary battery cells 21 are accommodated is stacked.
  • the battery module stack structure 1 can be formed by stacking the battery modules 10A in which the square secondary battery cells are accommodated.
  • Each battery module 10A constituting the battery module laminated structure illustrated in FIG. 18 has a pair of side plates 141 for having a large number of square secondary battery cells 28, and a pair of end plates 142.
  • the secondary battery cells 28 have a flat rectangular parallelepiped shape, and are arranged in an overlapping manner in the thickness direction.
  • the pair of side plates 141 is disposed on both sides of each secondary battery cell 28 so as to extend along the direction in which the secondary battery cells 28 are arranged.
  • the pair of end plates 142 is disposed in front of the secondary battery cells 28 at the leading end of the row of arranged secondary battery cells 28 and at the rear of the secondary battery cells 28 at the terminal end.
  • Each secondary battery cell 28 has a positive electrode external terminal 28p and a negative electrode external terminal 28n.
  • the positive electrode external terminal 28p and the negative electrode external terminal 28n respectively project upward from the top surface of the secondary battery cell 28.
  • Each secondary battery cell 28 has a gas discharge valve 146 disposed between the positive electrode external terminal 28p and the negative electrode external terminal 28n.
  • each secondary battery cell 28 internally has a power generation unit formed from the wound positive and negative electrode sheets.
  • the positive and negative external terminals 28p and 28n are connected to the positive and negative electrode sheets of the power generation unit, respectively.
  • the adjacent secondary battery cells 28 are alternately arranged with the front and back sides inverted so that the positive electrode external terminal 28p and the negative electrode external terminal 28n face each other.
  • the positive electrode external terminal 28p and the negative electrode external terminal 28n of the adjacent secondary battery cells 28 are connected by a bus bar, and all the secondary battery cells 28 are electrically connected in series.
  • Cell holders 143 are disposed on both sides of each secondary battery cell 28 in the arrangement direction. Each secondary battery cell 28 is arranged in a state in which approximately half of the thickness (length in the arrangement direction) is accommodated in each of the cell holders 143 arranged on both sides.
  • An end cell holder 144 is disposed in front of the secondary battery cell 28 at the beginning of the row of the secondary battery cells 28 and behind the secondary battery cell 28 at the end of the row of the secondary battery cells 28. .
  • the thickness (length in the arrangement direction) of the end cell holder 144 is about half of the thickness of the cell holder 143, and accommodates only one secondary battery cell 28 on the start or end side.
  • the pair of side plates 141 is fixed to the end plate 142 in a state where the cell holder 143 accommodating the secondary battery cell 28 and the end cell holder 144 are disposed between the pair of end plates 142.
  • the side plate 141 is fixed to the side surface of the end plate 142 by a bolt 145.
  • the cell holder 143 and the end cell holder 144 are held in a compressed state by the pair of end plates 142.
  • a through hole 142 a is formed in the side portion near the side plate 141 of each end plate 142 in the vertical direction, that is, in the direction orthogonal to the stacking direction of the secondary battery cells 28.
  • a fixing member 30C is provided between the upper battery module 10A and the lower battery module 10A.
  • the fixing member 30C has a structure similar to that of the fixing member 30B illustrated in FIG. 13 and includes a base portion 31c and shaft portions 36 and 37. However, the thickness t of the base portion 31c is larger than the thickness t of the base portion 31b of the fixing member 30B illustrated in FIG. This is to prevent the positive and negative external terminals 28p, 28n from coming into contact with the battery module 10A in the upper layer.
  • the outer diameters of the shaft-like portions 36 and 37 of the fixing member 30C are set to fit the through holes 111a of the battery module 10A, and the diameter of the base 31c is larger than the diameter of the through holes 111a of the battery module 10A. It is done.
  • the shaft-like portion 37 of the fixing member 30C is fitted in the through hole 142a of the end plate 142 in the lower battery module 10A. Further, the shaft-like portion 36 of the fixing member 30C is fitted into the through hole 142a of the end plate 142 in the upper battery module 10A.
  • the shaft-like portions 36 and 37 of the fixing member 30C have a function as a restricting part that restricts the movement of the upper and lower battery modules 10A in the direction orthogonal to the stacking direction.
  • the battery module 10A stacked vertically is provided with another through hole for inserting the fastening member 81 in the end plate 142, and is not shown. It is fixed to the lower case 60 of Alternatively, the fastening member 85 having the engaging portion 84 is inserted into the through hole 142 a of the end plate 142 and fixed to the lower case 60 (not shown).
  • the fixing member 30C is replaced with the fixing member 30 shown in FIG.
  • the holding case 100 is exemplified as a structure in which the circular boss portion 110 with which the claws 32, 33 of the fixing member 30 or the outer peripheral side 35 of the fixing member 30A is fitted is provided. did.
  • the boss portion 110 is not limited to a circular shape, and may be a polygon or an oval.
  • the boss portion 110 is not limited to the structure provided in a continuous manner in the height direction (vertical direction) of the battery module 10, and may be a convex portion that protrudes to the side facing the partner to be stacked.
  • the holding case 100 is exemplified as the structure including three case members of the lower holding case 101, the middle holding case 102, and the upper holding case 103.
  • the holding case 100 is not limited to such a structure, and may be configured by two case members or four or more case members.
  • a bolt is illustrated as the fastening member 81.
  • the fastening member 81 may be any shaft-like member such as a pin, and the fastening method may also be caulking or welding instead of screw fastening.
  • the battery module stack structure 1 is illustrated as a structure in which the battery modules 10 in which the cylindrical or rectangular lithium ion secondary battery cells 21 are accommodated are stacked.
  • the present invention may be applied to a structure in which the battery module 10 in which the secondary battery cell 21 using a water-soluble electrolyte is accommodated, such as a nickel hydrogen battery cell, a nickel cadmium battery cell, or a lead storage battery cell is stacked. It is possible.
  • the present invention can also be applied to a storage module laminated structure in which storage modules containing storage cells other than secondary battery cells such as lithium ion capacitors are stacked.
  • Battery Module Stacked Structure (Storage Module Stacked Structure) 10 Battery module (storage module) 10A battery module (storage module) 21 Secondary battery cell (storage cell) 30, 30A, 30B, 30B1, 30B2, 30C Fixing members 31, 31a, 31b, 31c Base portion 32. 33 Claw portion (Regulation portion) 34 through hole 35 outer peripheral side (regulating portion) 36, 37 Shaft-like part (Regulation part) 81 Fastening member (axial member) 110, 100a, 100b, 100c bosses 111 through holes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

L'invention concerne une structure stratifiée de modules de stockage d'énergie dans laquelle un intervalle entre des modules de stockage d'énergie stratifiés peut être ajusté. Une structure stratifiée 1 de modules de batterie comprend des éléments d'ancrage 30 qui sont disposés entre un premier module de batterie 10 et un second module de batterie 10, les éléments d'ancrage 30 ayant chacun une section de base 31 qui est interposée entre le premier module de batterie 10 et le second module de batterie 10, et des sections languette (sections de régulation) 32, 33 qui régulent le mouvement dans une direction perpendiculaire à la direction de stratification du premier module de batterie 10 et du second module de batterie 10.
PCT/JP2018/036640 2017-10-05 2018-10-01 Structure stratifiée de modules de stockage d'énergie Ceased WO2019069838A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017195510A JP2021015664A (ja) 2017-10-05 2017-10-05 蓄電モジュール積層構造体
JP2017-195510 2017-10-05

Publications (1)

Publication Number Publication Date
WO2019069838A1 true WO2019069838A1 (fr) 2019-04-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111916611A (zh) * 2020-08-27 2020-11-10 湖北亿纬动力有限公司 一种电池包及电池包的装配工艺
WO2023186681A1 (fr) * 2022-03-30 2023-10-05 Man Truck & Bus Se Accumulateur d'énergie pour un véhicule à moteur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023032219A (ja) * 2021-08-26 2023-03-09 日産自動車株式会社 バッテリーモジュール及び該バッテリーモジュールを収容したバッテリーパック
WO2025088940A1 (fr) * 2023-10-25 2025-05-01 パナソニックＩｐマネジメント株式会社 Dispositif d'alimentation électrique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006043163A1 (fr) * 2004-10-22 2006-04-27 Nissan Motor Co., Ltd. Module de batterie et ensemble batterie
WO2012066875A1 (fr) * 2010-11-17 2012-05-24 本田技研工業株式会社 Unité accumulatrice pour véhicule

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006043163A1 (fr) * 2004-10-22 2006-04-27 Nissan Motor Co., Ltd. Module de batterie et ensemble batterie
WO2012066875A1 (fr) * 2010-11-17 2012-05-24 本田技研工業株式会社 Unité accumulatrice pour véhicule

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111916611A (zh) * 2020-08-27 2020-11-10 湖北亿纬动力有限公司 一种电池包及电池包的装配工艺
WO2023186681A1 (fr) * 2022-03-30 2023-10-05 Man Truck & Bus Se Accumulateur d'énergie pour un véhicule à moteur

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