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WO2023032152A1 - Barre omnibus et module de batterie - Google Patents

Barre omnibus et module de batterie Download PDF

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Publication number
WO2023032152A1
WO2023032152A1 PCT/JP2021/032435 JP2021032435W WO2023032152A1 WO 2023032152 A1 WO2023032152 A1 WO 2023032152A1 JP 2021032435 W JP2021032435 W JP 2021032435W WO 2023032152 A1 WO2023032152 A1 WO 2023032152A1
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WO
WIPO (PCT)
Prior art keywords
conductive
plate
plate body
electrode terminal
busbar
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/JP2021/032435
Other languages
English (en)
Japanese (ja)
Inventor
英則 宮本
直樹 岩村
博清 間明田
寛高 柳澤
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to PCT/JP2021/032435 priority Critical patent/WO2023032152A1/fr
Priority to JP2023544934A priority patent/JP7753371B2/ja
Publication of WO2023032152A1 publication Critical patent/WO2023032152A1/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
    • 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
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered structure
    • 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

  • Embodiments of the present invention relate to busbars and battery modules.
  • a battery module or the like that includes a plurality of batteries (single cells)
  • the electrode terminals of one battery and the electrode terminals of another battery are electrically connected via bus bars.
  • the bus bar is connected to each of the two electrode terminals (the first electrode terminal and the second electrode terminal) by being joined by laser welding or the like.
  • battery modules formed from a plurality of batteries are required to have higher output.
  • a battery module with high output performance is required to appropriately suppress a temperature rise in a bus bar that electrically connects two electrode terminals even when a large current flows.
  • busbars are required to have an appropriate cross-sectional area that is perpendicular or substantially perpendicular to the extending direction of the electrical path, and to appropriately suppress an increase in electrical resistance in the busbar.
  • the stress applied from the busbars to the electrode terminals to which the busbars are connected is appropriately relieved.
  • the batteries (single cells) that form the battery module it is required to effectively prevent the deterioration of the hermeticity of the internal cavities caused by the stress from the busbars to the electrode terminals.
  • the problem to be solved by the present invention is to provide a bus bar in which a cross-sectional area orthogonal or substantially orthogonal to the extending direction of an electric path is ensured to have an appropriate size, and the stress applied to the electrode terminals is appropriately relaxed;
  • An object of the present invention is to provide a battery module having the bus bar.
  • a busbar that electrically connects between two electrode terminals that are spaced apart from each other.
  • the busbar includes a stacking plate body, a first joint and a second joint.
  • the laminated plate comprises a plurality of conductive plates each having electrical conductivity, and in the laminated plate, the plurality of conductive plates are stacked.
  • the first joint portion is formed at one end of the stacked plate body in the longitudinal direction of the stacked plate body that intersects the stacking direction of the plurality of conductive plates, and is a conductive member separate from the stacked plate body. It is joined to a first conductive member.
  • the second joint is formed at an end opposite to the first joint in the longitudinal direction of the stacked plate body, and is a second conductive member separate from the stacked plate body and the first conductive member. of the conductive member.
  • FIG. 1 is a schematic diagram showing an example of a single battery according to an embodiment.
  • FIG. 2 is a schematic diagram showing an example of the battery module of the embodiment.
  • FIG. 3 is a schematic diagram showing the busbar according to the first embodiment as viewed from one side in the first direction.
  • FIG. 4 is a schematic diagram showing a bus bar according to the first embodiment, two electrode terminals to which the bus bar is connected, and a configuration in the vicinity of these in a cross section orthogonal or substantially orthogonal to the third direction; be.
  • FIG. 5 shows a bus bar according to a first modification of the first embodiment, two electrode terminals to which the bus bar is connected, and a configuration in the vicinity of these in a cross section orthogonal or substantially orthogonal to the third direction.
  • FIG. 6 shows a bus bar according to a second modification of the first embodiment, two electrode terminals to which the bus bar is connected, and a configuration in the vicinity of these in a cross section orthogonal or substantially orthogonal to the third direction. It is the schematic which shows a bus-bar.
  • FIG. 7 shows a bus bar according to a third modification of the first embodiment, two electrode terminals to which the bus bar is connected, and a configuration in the vicinity of these in a cross section orthogonal or substantially orthogonal to the third direction.
  • FIG. 8 is a schematic diagram showing the bus bar according to the second embodiment as viewed from one side in the first direction.
  • FIG. 9 is a schematic diagram showing a bus bar according to a second embodiment, two electrode terminals to which the bus bar is connected, and a configuration in the vicinity of these when the bus bar is viewed from one side in the third direction; be.
  • FIG. 10 shows a bus bar according to a modification of the second embodiment, two electrode terminals to which the bus bar is connected, and a configuration in the vicinity of these when the bus bar is viewed from one side in the third direction.
  • 1 is a schematic diagram showing FIG.
  • a battery module includes a plurality of batteries.
  • the plurality of batteries comprises a first battery and a second battery.
  • the first battery has a first electrode terminal
  • the second battery has a second electrode terminal.
  • the busbar electrically connects the first terminal of the first battery and the second terminal of the second battery.
  • the bus bar is connected to each of the first electrode terminal and the second electrode terminal by being joined by laser welding or the like.
  • FIG. 1 shows an example of a battery 1 alone.
  • a battery 1 that is a single cell includes an electrode group 2 and an outer container 3 in which the electrode group 2 is accommodated.
  • the exterior container 3 is formed from metals, such as aluminum, an aluminum alloy, iron, or stainless steel.
  • the exterior container 3 includes a container body 5 and a lid 6.
  • the depth direction (direction indicated by arrows X1 and X2) and the lateral direction (direction indicated by arrows Y1 and Y2) crossing (perpendicular or substantially perpendicular to) the depth direction , and a height direction (direction indicated by arrows Z1 and Z2) that intersects (perpendicularly or substantially perpendicularly) to both the depth direction and the lateral direction are defined.
  • the dimension in the depth direction is smaller than the dimension in the lateral direction and the dimension in the height direction.
  • the container body 5 includes a bottom wall 7 and a peripheral wall 8.
  • An internal cavity 10 in which the electrode group 2 is housed is defined by a bottom wall 7 and a peripheral wall 8 .
  • the internal cavity 10 opens toward the side opposite to the side where the bottom wall 7 is located in the height direction.
  • the peripheral wall 8 surrounds the inner cavity 10 along the entire circumference.
  • the lid 6 is attached to the container body 5 by welding or the like at the opening of the internal cavity 10 .
  • the lid 6 is thus attached to the peripheral wall 8 at the end opposite the bottom wall 7 .
  • the lid 6 and the bottom wall 7 face each other across the internal cavity 10 in the height direction.
  • the internal cavity 10 is sealed and sealed to the exterior of the outer container 3 .
  • the electrode group 2 includes a positive electrode and a negative electrode (both not shown). Further, in the electrode group 2, a separator (not shown) is interposed between the positive electrode and the negative electrode. The separator is made of an electrically insulating material and electrically insulates the positive electrode from the negative electrode.
  • the positive electrode includes a positive electrode current collector such as a positive electrode current collector foil, and a positive electrode active material-containing layer carried on the surface of the positive electrode current collector.
  • the positive electrode current collector is, but not limited to, aluminum foil or aluminum alloy foil, etc., and has a thickness of about 5 ⁇ m to 20 ⁇ m.
  • the positive electrode active material-containing layer comprises a positive electrode active material and may optionally contain a binder and a conductive agent. Examples of positive electrode active materials include, but are not limited to, oxides, sulfides, and polymers that can intercalate and deintercalate lithium ions.
  • the positive electrode current collector has a positive electrode current collecting tab as a portion on which the positive electrode active material-containing layer is not supported.
  • the negative electrode includes a negative electrode current collector such as a negative electrode current collector foil, and a negative electrode active material-containing layer (not shown) carried on the surface of the negative electrode current collector.
  • the negative electrode current collector is, but not limited to, aluminum foil, aluminum alloy foil, copper foil, or the like, and has a thickness of about 5 ⁇ m to 20 ⁇ m.
  • the negative electrode active material containing layer comprises a negative electrode active material and may optionally contain a binder and a conductive agent. Examples of the negative electrode active material include, but are not limited to, metal oxides, metal sulfides, metal nitrides, and carbon materials that can occlude and release lithium ions.
  • the negative electrode current collector includes a negative electrode current collecting tab as a portion where the negative electrode active material-containing layer is not supported.
  • a pair of current collecting tabs is formed by the positive electrode current collecting tab and the negative electrode current collecting tab.
  • a pair of current collecting tabs protrude from the electrode group 2 .
  • the positive electrode current collecting tab protrudes to one side of the battery 1 in the lateral direction
  • the negative electrode current collecting tab is on the opposite side of the lateral direction of the battery 1 to the side from which the positive electrode current collecting tab protrudes.
  • each of the pair of current collecting tabs in the electrode group 2 protrudes in the height direction of the battery 1 toward the side where the lid 6 is located. In this case, the pair of current collecting tabs are positioned apart from each other in the lateral direction of the battery 1 .
  • the electrode group 2 is held (impregnated) with an electrolytic solution (not shown).
  • the electrolytic solution may be a non-aqueous electrolytic solution in which an electrolyte is dissolved in an organic solvent, or an aqueous electrolytic solution such as an aqueous solution.
  • a gel electrolyte may be used instead of the electrolytic solution, or a solid electrolyte may be used.
  • the solid electrolyte may be interposed between the positive electrode and the negative electrode in place of the separator in the electrode group. In this case, the solid electrolyte electrically insulates the positive electrode from the negative electrode.
  • a pair of electrode terminals 11 are attached to the outer surface (upper surface) of the lid 6 of the outer container 3 .
  • the electrode terminal 11 is made of a conductive material such as metal.
  • One of the electrode terminals 11 is the positive terminal of the battery 1 and the other of the electrode terminals 11 is the negative terminal of the battery 1 .
  • Each of the electrode terminals 11 penetrates the lid 6 through a corresponding through hole (not shown) and is inserted into the internal cavity 10 .
  • An insulating member 12 and an insulating gasket are provided between each of the electrode terminals 11 and the lid 6 .
  • Each of the electrode terminals 11 is prevented from contacting the lid 6 by the insulating member 12 and the insulating gasket, and is electrically insulated from the exterior container 3 including the lid 6 . Moreover, at the portions of the electrode terminals 11 penetrating through the lids 6 , airtightness between the lids 6 and the electrode terminals 11 is ensured by insulating gaskets. Therefore, even if the cover 6 is formed with through-holes for penetrating the electrode terminals 11 , the internal cavity 10 is properly sealed from the outside of the outer container 3 .
  • the positive electrode current collecting tab of the electrode group 2 is electrically connected to the corresponding positive electrode terminal of the electrode terminals 11 via one or more leads (positive electrode lead). Further, the negative electrode current collecting tab of the electrode group 2 is electrically connected to one of the corresponding negative electrode terminals 11 via one or more leads (negative lead). In each of the electrode terminals 11, the portion inserted into the internal cavity 10 is connected to the corresponding lead. Each of the leads is formed from a conductive material such as metal. In addition, in the internal cavity 10 of the outer container 3, each of the pair of current collecting tabs and leads is electrically connected to the outer container 3 (container body 5 and lid 6) by one or more insulating members (not shown). insulated to
  • the positive electrode terminal and the lead (positive electrode side lead) that electrically connects the positive electrode current collector tab and the positive electrode terminal are each preferably made of the same material as the positive electrode current collector.
  • the contact resistance at the connection portion of the positive electrode current collecting tab to the lead, the contact resistance at the connection portion of the positive electrode terminal to the lead, etc. reduced.
  • the negative electrode terminal and the lead (negative electrode side lead) that electrically connects the negative electrode current collector tab and the negative electrode terminal are each preferably made of the same material as the negative electrode current collector. .
  • each of the negative electrode lead and the negative electrode terminal is made of aluminum.
  • Each of the terminals is preferably formed from copper.
  • the lid 6 is formed with a gas release valve 13 and an injection port.
  • a sealing plate 15 is welded to the outer surface of the lid 6 to close the injection port. It should be noted that the gas release valve 13, the injection port, and the like may not be provided in the battery.
  • the configuration of the battery is not limited to the example shown in FIG.
  • the exterior of the battery may be formed from a laminate film instead of the exterior container 3 .
  • the metal layer is sandwiched between two electrically insulating insulating layers, and the outer surface of the casing is formed by one of the two insulating layers. Then, the electrode group is housed inside the exterior portion formed from the laminate film.
  • FIG. 2 shows an example of the battery module 20.
  • the battery module 20 includes batteries 1A and 1B. Batteries 1A and 1B have the same configuration as battery 1 in the example of FIG.
  • the battery (first battery) 1A has an electrode terminal (first electrode terminal) 11A as one of the pair of electrode terminals 11
  • the battery (second battery) 1B has a pair of electrode terminals. 11, an electrode terminal (second electrode terminal) 11B is provided.
  • the battery module 20 also includes a bus bar 21.
  • a bus bar is provided between the electrode terminal (first electrode terminal) 11A of the battery 1A and the electrode terminal (second electrode terminal) 11B of the battery 1B. 21 are electrically connected.
  • the bus bar 21 is connected to each of the electrode terminals 11A and 11B by being joined by laser welding or the like.
  • one of the electrode terminal 11A of the battery 1A and the electrode terminal 11B of the battery 1B is a positive terminal
  • the other of the electrode terminals 11A and 11B is a negative terminal. Therefore, in the example of FIG. 2 , the batteries 1A and 1B are electrically connected in series by the bus bar 21 .
  • two bus bars similar to bus bar 21 may be used to electrically connect two batteries in parallel. In this case, one of the two bus bars electrically connects the positive terminals of the two batteries. The other of the two bus bars electrically connects the negative terminals of the two batteries.
  • busbar A bus bar according to an embodiment will be described below.
  • the busbar electrically connects between the two electrode terminals, as described above.
  • the busbar electrically connects between the first electrode terminal of the first battery and the second electrode terminal of the second battery.
  • the busbar is formed from a conductive material such as metal.
  • the busbar 21 of the present embodiment electrically connects the two electrode terminals 11A and 11B in the example battery module 20 of FIG.
  • FIG. 3 shows the busbar 21 of the present embodiment
  • FIG. 4 shows the busbar 21 of the present embodiment, two electrode terminals 11A and 11B to which the busbar 21 is connected (joined), and the configuration of the vicinity thereof.
  • the busbar 21 has a first direction (directions indicated by arrows Z3 and Z4) and a second direction that intersects (perpendicularly or substantially perpendicularly) the first direction.
  • FIG. 3 shows the busbar 21 as viewed from one side in the first direction
  • FIG. 4 shows the busbar 21 in a cross section perpendicular or substantially perpendicular to the third direction.
  • the bus bar 21 includes a pair of connector plates 22A and 22B and a stack plate body 23.
  • Each of the connector plates 22A and 22B has a plate length direction, a plate width direction that intersects (perpendicularly or substantially perpendicular to) the plate length direction, and an intersects (perpendicular to) both the plate length direction and the plate width direction. or substantially perpendicular to each other) is defined.
  • the plate thickness direction matches or substantially matches the first direction of the busbars 21, and the plate length direction matches or substantially matches the second direction of the busbars 21.
  • the plate width direction matches or substantially matches the third direction of the bus bar 21 .
  • the connector plate (first connector plate) 22A is a conductive member (first conductive member) made of a conductive material, and is joined to the electrode terminal (first electrode terminal) 11A of the battery 1A by ultrasonic welding or the like. be done.
  • the connector plate 22A is joined (connected) to the electrode terminal 11A in a state in which the electrode terminal 11A abuts from one side (arrow Z3 side) of the bus bar 21 in the first direction. 2 and 4, the connector plate 22A is joined to the electrode terminal 11A in a state of contacting the electrode terminal 11A from the side facing the outer surface of the lid 6 of the battery 1A. As shown in an example of FIG.
  • the connector plate 22A is formed with a through hole 25A penetrating through the connector plate 22A in the plate thickness direction.
  • the connector plate 22A is joined to the electrode terminal 11A on the surface facing the side where the electrode terminal 11A (battery 1A) is located in the plate thickness direction (the first direction of the busbar 21) and at the site around the through hole 25A. be done.
  • the connector plate (second connector plate) 22B is a conductive member (second conductive member) made of a conductive material, and is joined to the electrode terminal (second electrode terminal) 11B of the battery 1B by ultrasonic welding or the like. be done.
  • the electrode terminal 11B abuts against the connector plate 22B from the side (arrow Z3 side) where the electrode terminal 11A abuts the connector plate 22A in the first direction of the bus bar 21 .
  • the connector plate 22B is joined (connected) to the electrode terminals 11B while the electrode terminals 11B are in contact with each other as described above.
  • the connector plate 22B is joined to the electrode terminal 11B in a state of contacting the electrode terminal 11B from the side facing the outer surface of the lid 6 of the battery 1B.
  • the connector plate 22B is formed with a through hole 25B penetrating through the connector plate 22B in the plate thickness direction.
  • the connector plate 22B is joined to the electrode terminal 11B on the surface facing the side where the electrode terminal 11B (battery 1B) is located in the plate thickness direction (the first direction of the bus bar 21) and at the site around the through hole 25B. be done.
  • the stacked plate body 23 includes a plurality of conductive plates 26, and in one example such as FIG. 4, four conductive plates 26 are provided.
  • Each of the plurality of conductive plates 26 is made of a conductive material and has electrical conductivity.
  • a plurality of conductive plates 26 are stacked against each other.
  • the plate length direction, the plate width direction that intersects (perpendicularly or substantially perpendicular to) the plate length direction, and the plate length direction and the plate width direction that intersect (perpendicularly) or substantially orthogonal) are defined.
  • the plurality of conductive plates 26 are stacked in a state in which the plate thickness direction of each conductive plate 26 matches or substantially matches the stacking direction.
  • the stacking direction of the plurality of conductive plates 26 is defined as the thickness direction.
  • the length direction intersecting (perpendicular or substantially perpendicular) to the stacking direction and the width direction intersecting (perpendicular or substantially perpendicular) to both the stacking direction and the length direction is defined.
  • the length direction of the stacked plate body 23 matches or substantially matches the plate length direction of each of the conductive plates 26 .
  • the width direction of the stacked plate body 23 matches or substantially matches the plate width direction of each conductive plate 26 and matches or substantially matches the third direction of the bus bar 21 .
  • the conductive plate 26A is positioned closest to the electrode terminals 11A and 11B, and the conductive plate 26B is located near the electrode terminals 11A and 11B. most distal to the
  • Each of the plurality of conductive plates 26 has an edge surface E1 forming one end in the plate length direction and an edge surface E2 forming an end opposite to the edge surface E1 in the plate length direction.
  • the stacked plate body 23 has an end S1 on one side in the length direction and an end S2 on the side opposite to the end S1 in the length direction.
  • the edge surfaces E1 of the plurality of conductive plates 26 are not displaced or hardly displaced with respect to each other in the length direction of the stacked plate body 23 .
  • the end S1 of the stacked plate body 23 is formed by the edge surfaces E1 of all the conductive plates 26 .
  • the edge surfaces E2 of the plurality of conductive plates 26 are not displaced or hardly displaced with respect to each other in the longitudinal direction of the stacked plate body 23 . For this reason, in one example such as FIG. 4 , the end S2 of the stacked plate body 23 is formed by the edge surfaces E2 of all the conductive plates 26 .
  • the edge surfaces E1 of one or more of the conductive plates 26 are offset from the edge surfaces E1 of the other conductive plates 26 in the longitudinal direction of the stacked plate body 23, and all of the conductive plates 26
  • the end S1 of the stacked plate body 23 is formed only by the edge face E1 of a part of the conductive plate 26 inside.
  • the edge surface E1 of the remaining conductive plate 26 is shifted toward the end S2 with respect to the end S1 of the plate stack 23. As shown in FIG.
  • edge surface E2 of one or more of the conductive plates 26 is offset from the edge surface E2 of the other conductive plate 26 in the longitudinal direction of the stack 23, and one of all the conductive plates 26
  • the end S2 of the laminated plate body 23 is formed only by the edge surface E2 of the conductive plate 26 of the part.
  • the edge surface E2 of the remaining conductive plate 26 is shifted from the end S2 of the plate stack 23 toward the end S1.
  • bending positions B1 and B2 are formed between ends S1 and S2 in the length direction of the stacked plate body 23 .
  • the portion adjacent to the bending position B1 on the side opposite to the end S1 bends with respect to the portion between the end S1 and the bending position B1.
  • the portion of each of the plurality of conductive plates 26 adjacent to the bent position B1 on the side opposite to the end S1 is the side away from the electrode terminals 11A and 11B in the first direction of the bus bar 21. It bends (to the distal side with respect to the electrode terminals 11A and 11B).
  • the portion adjacent to the bending position B2 on the side opposite to the end S2 bends with respect to the portion between the end S2 and the bending position B2.
  • the portion of each of the plurality of conductive plates 26 adjacent to the bent position B2 on the side opposite to the end S2 is the side away from the electrode terminals 11A and 11B in the first direction of the bus bar 21. It bends (to the distal side with respect to the electrode terminals 11A and 11B).
  • the portion between the bending positions B1 and B2 in the length direction is formed in a convex shape protruding from the electrode terminals 11A and 11B in the first direction of the busbar 21.
  • the portion between the bending positions B1 and B2 in the length direction is the portion between the end S1 and the bending position B1, and the portion between the end S2 and the bending position B2. and protrudes away from the electrode terminals 11A and 11B.
  • a convex apex 28 is formed between the bending positions B1 and B2 in the length direction, and the apex 28 forms a convex protruding end between the bending positions B1 and B2. do.
  • each of the plurality of conductive plates 26 is formed in a curved shape in a convex portion between bending positions B1 and B2 in the longitudinal direction of the stacked plate body 23 .
  • the sides on which the electrode terminals 11A and 11B are located are inside the curve in the first direction.
  • the side away from 11A and 11B is the outside of the curve.
  • the surfaces of the plurality of conductive plates 26 facing the stacking direction are curved.
  • the cross-sectional shape of each of the conductive plates 26 at the convex portion between the bending positions B1 and B2 in the cross section orthogonal or substantially orthogonal to the third direction (the width direction of the stacked plate body 23) is arcuate or substantially arcuate.
  • the center of the arcuate or substantially arcuate cross-sectional shape formed by each of the conductive plates 26 in the convex portion is positioned on the side of the plate stack 23 on which the electrode terminals 11A and 11B are positioned in the first direction. .
  • each of the conductive plates 26 at the convex portion is U-shaped. Alternatively, it may be substantially U-shaped or the like. 4 and other examples, each of the conductive plates 26 is separated from the adjacent conductive plate 26 in the stacking direction over the entire dimension or substantially the entire dimension along the plate length direction from the edge surface E1 to the edge surface E2. abut.
  • a joint portion ( A first junction) 27A is formed in the stacked plate body 23 .
  • a joint portion 27A of the stacked plate body 23 is joined to the connector plate 22A by ultrasonic welding or the like.
  • the joint portion 27A is formed at a portion between the end S1 and the bending position B1.
  • the joint portion 27A is formed on the conductive plate 26A that is positioned closest to the electrode terminals 11A and 11B among the plurality of conductive plates 26 .
  • a joint portion 27A is formed on the surface facing the electrode terminals 11A and 11B in the first direction. For this reason, in the example of FIG.
  • the stacked plate body 23 (conductive plate 26A) is in contact with the connector plate 22A from the side opposite to the side where the electrode terminals 11A and 11B are located in the first direction. Joint portion 27A of body 23 is joined to connector plate 22A.
  • the end portion on the side opposite to the joint portion 27A in the length direction, that is, the portion near the end S2 in the length direction is joined to the connector plate 22B, which is a conductive member (second conductive member).
  • a joint portion (second joint portion) 27B is formed.
  • the joint portion 27B of the stacked plate body 23 is joined to the connector plate 22B by ultrasonic welding or the like.
  • the joint portion 27B is formed at a portion between the end S2 and the bending position B2.
  • the joint portion 27B is formed on the conductive plate 26A that is positioned closest to the electrode terminals 11A and 11B among the plurality of conductive plates 26 .
  • a joint portion 27B is formed on the surface of the conductive plate 26A that faces the side where the electrode terminals 11A and 11B are located in the first direction. For this reason, in the example of FIG. 4 and the like, the stacked plate body 23 (conductive plate 26A) is in contact with the connector plate 22B from the side opposite to the electrode terminals 11A and 11B in the first direction. Joint portion 27B of body 23 is joined to connector plate 22B.
  • the plurality of conductive plates 26 are joined together at the joining portion 27A and its vicinity in the longitudinal direction, such as the portion between the end S1 and the bending position B1. Further, in the laminated plate body 23, the plurality of conductive plates 26 are joined to each other at the joining portion 27B and its vicinity in the longitudinal direction, such as the portion between the end S2 and the bending position B2. .
  • each of the conductive plates 26 is not joined to the other conductive plates 26 except for the joints 27A and 27B and their vicinities.
  • each of the conductive plates 26 is not joined to the other conductive plate 26 at the portion between the bent positions B1 and B2 in the longitudinal direction of the stacked plate body 23 . Therefore, in the stacked plate body 23, a non-joint portion is formed in which each of the conductive plates 26 is not joined to the other conductive plate 26 over most of the length direction.
  • a joint portion (first joint portion) 27A may be formed on the conductive plate 26B positioned farthest to the electrode terminals 11A and 11B among the plurality of conductive plates 26. .
  • the joint portion 27A of the stacked plate body 23 is connected to the connector plate (the second direction). 1 connector plate) 22A.
  • a joint portion (second joint portion) 27B may be formed on the conductive plate 26B positioned most distally with respect to the electrode terminals 11A and 11B among the plurality of conductive plates 26 .
  • the joint portion 27B of the stacked plate body 23 is connected to the connector plate (second 2 connector plate) 22B.
  • Each of the plurality of conductive plates 26 forming the stacked plate body 23 has a plate thickness T0.
  • the plate thicknesses T0 of the plurality of conductive plates 26 are the same or substantially the same as each other.
  • each of the connector plates 22A and 22B has a plate thickness T1.
  • the thickness T1 of the connector plates 22A and 22B is the same or substantially the same as each other.
  • the plate thickness T0 of each of the plurality of conductive plates 26 is thinner than the plate thickness T1 of the connector plates 22A and 22B.
  • the total thickness T0 of the plurality (all) of the conductive plates 26 is the same or substantially the same as the thickness T1 of each of the connector plates 22A and 22B.
  • the total thickness T0 of all the conductive plates 26 is represented by the value (n ⁇ T0).
  • the plate width W of each of the plurality of conductive plates 26 is the same or substantially the same size (width) as the plate width of each of the connector plates 22A and 22B.
  • the connector plate (first connector plate) 22A is preferably made of the same material as the electrode terminal (first electrode terminal) 11A
  • the connector plate (second connector plate) 22B is preferably made of the same material as the electrode terminal (first electrode terminal).
  • (Second electrode terminal) It is preferably made of the same material as 11B.
  • Each of the plurality of conductive plates 26 is preferably made of a material having higher thermal and electrical conductivity than at least one of the connector plates 22A and 22B, and is more thermally conductive than both the connector plates 22A and 22B. More preferably, it is made of a highly conductive material.
  • each of the electrode terminals 11A, 11B is made of aluminum and each of the connector plates 22A, 22B is made of aluminum.
  • Each of the conductive plates 26 is made of copper, which has higher thermal conductivity (thermal conductivity) and electrical conductivity (conductivity) than aluminum.
  • electrode terminals 11A and connector plate 22A are each formed from aluminum
  • electrode terminals 11B and connector plate 22B are each formed from copper.
  • Each of the conductive plates 26 is then formed from silver, which has higher thermal and electrical conductivity than aluminum and copper.
  • a plurality of conductive plates 26 are stacked on the stacked plate body 23 of the busbar 21 . Then, the stacked plate body 23 is joined to a connector plate 22A, which is a conductive member different from the stacked plate body 23, at a joining portion 27A formed at one end in the longitudinal direction.
  • a connector plate 22B which is a conductive member different from the overlapping plate body 23 and the connector plate 22A, is joined to a connector plate 22B at a joint portion 27B formed at the end opposite to the portion 27A.
  • the plate thickness T0 of each of the plurality of conductive plates 26 is thin, but the total value (n ⁇ T0) of the plate thickness T0 of the plurality of conductive plates 26 is a certain thickness (size). Therefore, in the stacked plate body 23, the cross-sectional area of each of the plurality of conductive plates 26 (the cross-sectional area of the single conductive plate 26) is small, but the cross-sectional area of the stacked plate body 23, which is the total value of the cross-sectional areas of the plurality of conductive plates 26, is small. The overall cross-sectional area is secured to a certain size.
  • the busbar 21 of the present embodiment even if the stacked plate body 23 in which a plurality of conductive plates 26 are stacked is provided, the cross-sectional area of the entire stacked plate body 23 orthogonal or substantially orthogonal to the extending direction of the electric path is , is properly sized. Therefore, the cross-sectional area of the busbar 21 that is orthogonal or substantially orthogonal to the extending direction of the electrical path is ensured to have an appropriate size, and an increase in electrical resistance in the busbar 21 is appropriately suppressed. As a result, even if a large current flows through the busbar 21 that electrically connects the electrode terminals 11A and 11B, the temperature rise in the busbar 21 is appropriately suppressed. By allowing a large current to flow through the busbar 21, it becomes possible to achieve a high output power of the battery module 20 including the batteries 1A and 1B.
  • stress from the busbar 21 acts on each of the electrode terminals 11A and 11B to which the busbar 21 is joined (connected).
  • a stress acts in the second direction of the bus bar 21 on the electrode terminals 11A and 11B.
  • the stacked plate body 23 in which the plurality of conductive plates 26 are stacked is provided. Therefore, when one plate member having the same or substantially the same cross-sectional area as the total value of the cross-sectional areas of the plurality of conductive plates 26 (the cross-sectional area of the entire stacked plate body 23) is provided instead of the stacked plate body 23
  • the stress applied to each of the electrode terminals 11A and 11B is relaxed as compared with the above.
  • n is an integer equal to or greater than 2
  • conductive plates 26 are stacked in the stacked plate body 23, and each of the n conductive plates 26 has a plate thickness T0 and a plate width W.
  • each of the conductive plates 26 is not joined to the other conductive plates 26 over most of the length direction. Therefore, the layered plate 23 can be substantially regarded as a so-called layered beam.
  • the geometrical moment of inertia I0 of the laminated plate body 23 can be calculated in the same manner as the geometrical moment of inertia of the laminated beam, and is calculated according to Equation (1).
  • one plate member having the same plate thickness as the total value (n ⁇ T0) of the plate thickness T0 of the n conductive plates 26 and having the same plate width W as the conductive plate 26 is provided in place of the stacking plate 23 .
  • the geometrical moment of inertia I1 in one plate member is calculated as shown in Equation (2).
  • I0 n ⁇ ((W ⁇ T0 3 )/12) (1)
  • the geometrical moment of inertia I0 of the laminated plate body 23 is relative to the geometrical moment of inertia I1 of one plate member having the same cross-sectional area as the laminated plate body 23. , 1/ n2 . Therefore, by providing the laminated plate body 23 on the bus bar 21, the geometrical moment of inertia of the laminated plate body 23 is reduced, so that the stress applied from the bus bar 21 to each of the electrode terminals 11A and 11B is appropriately relaxed. be done. By relaxing the stress applied to the electrode terminal 11A, in the battery 1A, the stress applied to an insulating gasket or the like disposed near the electrode terminal 11A is also alleviated.
  • the stress on the insulating gasket and the like is appropriately relieved, thereby effectively preventing the deterioration of the hermeticity of the internal cavity 10 due to the stress from the busbar 21 to the electrode terminal 11A.
  • the relaxation of the stress applied to the electrode terminals 11A effectively prevents deterioration of the hermeticity of the internal cavity 10 due to the stress from the bus bar 21 to the electrode terminals 11B.
  • the cross-sectional area orthogonal or substantially orthogonal to the extending direction of the electrical path is ensured to have an appropriate size, and the voltage is applied from the busbar 21 to the electrode terminals 11A and 11B. applied stresses are appropriately relieved.
  • the bent positions B1 and B2 described above are formed in the laminated plate body 23, and the portion between the bent positions B1 and B2 in the length direction is formed in a convex shape. By forming the convex shape (bend structure) on the stacked plate body 23 as described above, the stress applied from the bus bar 21 to the electrode terminals 11A and 11B is further relieved.
  • the connector plate 22A by forming the connector plate 22A from the same material as the electrode terminal 11A, it is possible to effectively prevent the formation of gaps in the joining portion of the connector plate 22A to the electrode terminal 11A. The bonding performance between the plate 22A and the electrode terminal 11A is improved.
  • the connector plate 22B by forming the connector plate 22B from the same material as that of the electrode terminals 11B, it is possible to effectively prevent the formation of gaps in the connecting portions of the connector plate 22B and the electrode terminals 11B, thereby effectively preventing the connector plate 22B from forming the electrode terminals 11B. The bonding performance with the terminal 11B is improved.
  • each of the conductive plates 26 is made of a material having higher thermal conductivity and electrical conductivity than at least one of the connector plates 22A and 22B.
  • the temperature rise at the bus bar 21 is further appropriately suppressed. Therefore, by forming each of the conductive plates 26 from a material having higher thermal and electrical conductivity than at least one of the connector plates 22A and 22B, the conductive plates 26 are formed from the same material as the connector plates 22A and 22B. It is possible to further increase the current flowing through the bus bar 21 as compared with the case where the bus bar 21 is connected. This makes it possible to increase the output of the battery module 20 including the batteries 1A and 1B.
  • each of the conductive plates 26 from a material having higher thermal conductivity and electrical conductivity than at least one of the connector plates 22A and 22B, the number of conductive plates 26 forming the stacked plate body 23 can be reduced. Even if it is reduced, it is possible to pass the same amount of electric current to the bus bar 21 as when the conductive plate 26 is made of the same material as the connector plates 22A and 22B.
  • the conductive plates 26 do not contact adjacent conductive plates 26 in the stacking direction in the portion between the bending positions B1 and B2 of the stacked plate body 23 .
  • a gap 31 is formed between each of the plurality of conductive plates 26 and adjacent conductive plates 26 in the stacking direction in the portion between the bending positions B1 and B2 of the stacked plate body 23 .
  • the stacked plate body 23 includes a pair of plate contact portions 32A and 32B and a plate spacing portion 33. As shown in FIG.
  • the plate contact portion (first plate contact portion) 32A is formed at the end portion of the stack plate body 23 in the longitudinal direction on the side where the joint portion (first joint portion) 27A is located, and is curved with the end S1. It is formed in the portion between position B1.
  • each of the plurality of conductive plates 26 contacts the conductive plate 26 adjacent in the stacking direction.
  • the plurality of conductive plates 26 are joined to each other at the plate contact portion 32A.
  • the plate contact portion (second plate contact portion) 32B is formed at the end portion of the stack plate body 23 in the longitudinal direction on the side where the joint portion (second joint portion) 27B is located, and is curved with the end S2. It is formed in the portion between position B2.
  • the plate contact portion 32B is formed at the end of the stack plate body 23 on the side opposite to the plate contact portion 32A in the longitudinal direction.
  • each of the plurality of conductive plates 26 contacts the conductive plate 26 adjacent in the stacking direction.
  • the plurality of conductive plates 26 are joined to each other at the plate contact portion 32B.
  • the edge surface E1 of each of the plurality of conductive plates 26 is offset from the edge surface E1 of the other conductive plate 26 in the length direction of the stacked plate body 23 .
  • An end S1 of the stacked plate body 23 is formed only by the edge surface E1 of the conductive plate 26A on the most proximal side with respect to the electrode terminals 11A and 11B.
  • the edge surface E1 of the conductive plate 26 on the distal side with respect to the electrode terminals 11A and 11B is located away from the end S1 toward the end S2.
  • the edge surface E2 of each of the plurality of conductive plates 26 is offset from the edge surface E2 of the other conductive plate 26 in the length direction of the stacked plate body 23. As shown in FIG.
  • An end S2 of the plate stack 23 is formed only by the edge surface E2 of the conductive plate 26A that is closest to the electrode terminals 11A and 11B.
  • the edge surface E2 of the conductive plate 26 on the distal side with respect to the electrode terminals 11A and 11B is located away from the end S2 toward the end S1.
  • the plate separation portion 33 is formed between the plate contact portions 32A and 32B in the longitudinal direction of the stacked plate body 23, and is formed in a convex portion between the bending positions B1 and B2.
  • each of the plurality of conductive plates 26 is formed in a curved shape.
  • the side where the electrode terminals 11A and 11B are positioned in the first direction is the inner side of the curve.
  • the side away from 11A and 11B is the outside of the curve.
  • the curvature of the curved shape increases as the conductive plate 26 is located closer to the electrode terminals 11A and 11B. Therefore, among the plurality of conductive plates 26, the conductive plate 26A closest to the electrode terminals 11A and 11B has the largest curvature of the curved shape at the plate separation portion 33, and the electrode terminals 11A and 11B have the largest curvature.
  • the curvature of the curved shape at the plate separation portion 33 is the smallest at the most distal conductive plate 26B.
  • each of the conductive plates 26 is not joined to the other conductive plate 26 in the portion between the bent positions B1 and B2 in the longitudinal direction of the stacked plate body 23 . That is, each of the conductive plates 26 is not joined to the other conductive plates 26 at the plate separation portion 33 . Therefore, even in the stacked plate body 23 of this modified example, a non-joint portion is formed in which each of the conductive plates 26 is not joined to the other conductive plate 26 over most of the length direction.
  • This modified example also has the same actions and effects as those of the first embodiment and the like. Therefore, in the busbar 21 of this modified example as well, the cross-sectional area perpendicular or substantially perpendicular to the extending direction of the electrical path is ensured to have an appropriate size, and the stress applied from the busbar 21 to the electrode terminals 11A and 11B is reduced. is appropriately mitigated. In addition, in this modification, a gap 31 is formed between each of the plurality of conductive plates 26 and the adjacent conductive plate 26 in the stacking direction in the plate separation portion 33 . Therefore, the heat dissipation property of the laminated plate body 23 of the busbar 21 is improved, and the temperature rise in the busbar 21 is further appropriately suppressed.
  • a gap 31 is formed between each of the plurality of conductive plates 26 and adjacent conductive plates 26 in the stacking direction.
  • the edge surfaces E1 of the plurality of conductive plates 26 are not displaced or hardly displaced with respect to each other in the longitudinal direction of the stacked plate body 23 .
  • Edge surfaces E1 of all the conductive plates 26 form an end S1 of the stacked plate body 23.
  • the edge surfaces E2 of the plurality of conductive plates 26 are not displaced or hardly displaced with respect to each other in the longitudinal direction of the stacked plate body 23 .
  • Edge surfaces E2 of all the conductive plates 26 form an end S2 of the stacked plate body 23.
  • the conductive plate 26 positioned closer to the electrode terminals 11A and 11B along the length direction of the stacked plate body 23 from the edge surface E1 to the edge surface E2.
  • the extension length becomes shorter. Then, the closer the conductive plate 26 is positioned to the proximal side with respect to the electrode terminals 11A and 11B, the more the plate separation portion 33 (the convex portion between the bending positions B1 and B2) along the length direction of the laminated plate body 23 becomes. Extension length is shortened.
  • the conductive plate 26A closest to the electrode terminals 11A and 11B has the shortest extension length along the longitudinal direction of the stacked plate body 23, and the electrode terminal
  • the extension length along the longitudinal direction of the stack 23 is the longest at the conductive plate 26B that is the most distal with respect to 11A and 11B.
  • each of the conductive plates 26 in the stacked plate body 23 has a different extension length along the length direction, so that in the plate separation portion 33, each of the plurality of conductive plates 26 and the stacking direction A gap 31 is formed between the conductive plates 26 adjacent to each other.
  • the gap 31 is formed in the plate separation portion 33, the heat dissipation of the stacked plate body 23 of the busbar 21 is improved, and the temperature rise in the busbar 21 is further reduced, as in the modification of FIG. Properly suppressed.
  • the edge surfaces E1 of the plurality of conductive plates 26 are not displaced or hardly displaced with respect to each other in the longitudinal direction of the stacked plate body 23 .
  • the edge surfaces E2 of the plurality of conductive plates 26 are not displaced or hardly displaced from each other in the longitudinal direction of the stacked plate body 23. As shown in FIG. Therefore, workability is improved in assembling (forming) the plate stack 23 and forming the bus bar 21 .
  • the connector plates 22A and 22B are not provided on the busbar 21, and the busbar 21 is formed only from the laminated plate body 23.
  • the joint portion (first joint portion) 27A of the stacked plate body 23 is joined to the electrode terminal (first conductive member) 11A of the battery 1A, which is a conductive member different from the stacked plate body 23. be.
  • the joint portion (second joint portion) 27B of the stacked plate body 23 is joined to the electrode terminal (second conductive member) 11B of the battery 1B, which is a conductive member different from the stacked plate body 23 and the electrode terminal 11A. be done.
  • only one of the connector plates 22A and 22B may be provided on the bus bar 21 .
  • the same functions and effects as those of the first embodiment and the like can be obtained. That is, even in the busbar 21 of the modified example of FIG. applied stresses are appropriately relieved.
  • the number of the conductive plates 26 forming the stacked plate body 23 is not particularly limited as long as it is two or more. .
  • busbar 21 (Second embodiment) Next, a busbar 21 according to a second embodiment will be described.
  • the busbar 21 of this embodiment is obtained by modifying the busbar 21 of the first embodiment and the like as follows. Therefore, in the bus bar 21 of the present embodiment, description of the same configuration as that of the first embodiment and the like will be omitted.
  • FIG. 8 shows the busbar 21 of this embodiment
  • FIG. 9 shows the configuration of the busbar 21 of this embodiment, two electrode terminals 11A and 11B to which the busbar 21 is connected (joined), and their vicinity.
  • the first direction (the direction indicated by arrows Z3 and Z4)
  • the second direction (the direction indicated by arrows Y3 and Y4)
  • the third direction Directions (directions indicated by arrows X3 and X4) are defined.
  • 8 shows the busbar 21 as viewed from one side in the first direction
  • FIG. 10 shows the busbar 21 as viewed from one side in the third direction.
  • the bus bar 21 also includes connector plates 22A and 22B, and the length direction, width direction, and thickness direction of each of the connector plates 22A and 22B are defined in the same manner as in the first embodiment. be done.
  • the bus bar 21 includes a plurality of conductive wires 41 instead of the layered plates 23, and ten conductive wires 41 are provided in an example such as FIGS.
  • Each of the plurality of conductive wires 41 is made of a conductive material and has electrical conductivity. Examples of the material forming the conductive wire 41 include copper.
  • Each of the conductive wires 41 has a central axis, and each of the conductive wires 41 defines an axial direction along the central axis.
  • Each of the plurality of conductive wires 41 has a bonding portion (first bonding portion) bonded to a connector plate (first connector plate) 22A, which is a conductive member (first conductive member), at one end in the axial direction. bonding portion) 42A is formed.
  • Each of the plurality of conductive wires 41 is bonded to a connector plate (second connector plate) 22B, which is a conductive member (second conductive member), at an end portion opposite to the bonding portion 42A in the axial direction.
  • a bonding portion (second bonding portion) 42B is formed.
  • a corresponding one of the conductive wires 41 is bonded to the connector plate 22A, such as by ultrasonic welding.
  • a corresponding one of the conductive wires 41 is bonded to the connector plate 22B, such as by ultrasonic welding.
  • Each of the plurality of conductive wires 41 extends in at least one direction of the first direction of the bus bar 21 (thickness direction of the connector plates 22A and 22B) and the third direction of the bus bar 21 (the plate width direction of the connector plates 22A and 22B). at a distance from the other conductive wires 41 . Therefore, in the busbar 21, the plurality of conductive wires 41 do not contact each other. 8 and 9, the plurality of conductive wires 41 are composed of five conductive wires 41A and five conductive wires 41B. The five conductive wires 41A are arranged apart from each other in the third direction (the width direction of the connector plates 22A and 22B), and the five conductive wires 41B are arranged apart from each other in the third direction. placed.
  • the conductive wire 41A is arranged apart from the conductive wire 41B in the first direction (thickness direction of the connector plates 22A and 22B).
  • the conductive wire 41A extends through a region farther from the electrode terminals 11A and 11B in the first direction than the conductive wire 41B.
  • the busbar 21 is provided with a plurality of conductive wires 41 .
  • the diameter of each of the plurality of conductive wires 41 is small, and the cross-sectional area of each of the conductive wires 41 is small.
  • the total cross-sectional area of the plurality of conductive wires 41 can be secured to some extent.
  • the total value of the cross-sectional areas of the plurality of conductive wires 41 is the cross-sectional area orthogonal or substantially orthogonal to the extending direction of the electrical path.
  • the cross-sectional area of the busbar 21 orthogonal or substantially orthogonal to the extending direction of the electrical path is ensured to have an appropriate size.
  • a plurality of conductive wires 41 are provided on the bus bar 21 as described above. Therefore, the stress applied from the bus bar 21 to each of the electrode terminals 11A and 11B is reduced compared to the case where the plate-like portions integrated with the connector plates 22A and 22B are provided instead of the plurality of conductive wires 41. be.
  • the cross-sectional area orthogonal or substantially orthogonal to the extending direction of the electric path is ensured to have an appropriate size, and voltage is applied from the busbar 21 to the electrode terminals 11A and 11B. applied stresses are appropriately relieved. Therefore, this embodiment also has the same functions and effects as those of the above-described embodiments.
  • the busbar 21 is not provided with connector plates 22A, 22B, and the busbar 21 is formed only from a plurality of conductive wires 41.
  • each bonding portion (first bonding portion) 42A of the conductive wire 41 is bonded to the electrode terminal (first conductive member) 11A of the battery 1A, which is a conductive member different from the conductive wire 41. be.
  • Each bonding portion (second bonding portion) 42B of the conductive wire 41 is bonded to the electrode terminal (second conductive member) 11B of the battery 1B, which is a conductive member different from the conductive wire 41 and the electrode terminal 11A. be done.
  • only one of the connector plates 22A and 22B may be provided on the bus bar 21 .
  • the same functions and effects as those of the second embodiment and the like can be obtained. That is, even in the busbar 21 of the modified example shown in FIG. applied stresses are appropriately relieved.
  • the number of conductive wires 41 provided on the busbar 21 is not particularly limited as long as it is two or more.
  • the busbar comprises a stacking plate, in which a plurality of conductive plates are stacked.
  • the stacked plate body is connected to a first conductive member, which is a conductive member different from the stacked plate body, at a first joint portion formed at one end of the stacked plate body in the longitudinal direction of the stacked plate body. spliced.
  • the laminated plate body is separated from the laminated plate body and the first conductive member at the second joint portion formed at the end opposite to the first joint portion in the longitudinal direction of the laminated plate body.
  • a cross-sectional area perpendicular or substantially perpendicular to the direction in which the electrical path extends can be ensured to have an appropriate size, and a bus bar can be provided in which the stress applied to the electrode terminals is appropriately relaxed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention porte, selon un mode de réalisation, sur une barre omnibus qui raccorde électriquement deux bornes d'électrode disposées de sorte à être espacées l'une de l'autre. La barre omnibus comprend un corps de plaque en couches, une première partie de joint et une seconde partie de joint, une pluralité de plaques conductrices étant empilées dans le corps de plaque en couches. La première partie de joint est formée dans une section d'extrémité sur un côté du corps de plaque en couches dans le sens de la longueur du corps de plaque en couches, le sens de la longueur croisant la direction empilée de la pluralité de plaques conductrices, et est reliée à un premier élément conducteur séparé différent du corps de plaque en couches. La seconde partie de joint est formée dans une section d'extrémité sur le côté opposé à la première partie de joint dans le sens de la longueur du corps de plaque en couches, et est reliée au corps de plaque en couches et à un second élément conducteur séparé différent du premier élément conducteur.
PCT/JP2021/032435 2021-09-03 2021-09-03 Barre omnibus et module de batterie Ceased WO2023032152A1 (fr)

Priority Applications (2)

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PCT/JP2021/032435 WO2023032152A1 (fr) 2021-09-03 2021-09-03 Barre omnibus et module de batterie
JP2023544934A JP7753371B2 (ja) 2021-09-03 2021-09-03 バスバー及び電池モジュール

Applications Claiming Priority (1)

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FR3150351A1 (fr) * 2023-06-26 2024-12-27 Renault S.A.S. Barre omnibus pour batterie d’accumulateurs, boitier de connexion mécatronique, bloc de batterie d’accumulateurs et véhicule automobile comprenant une telle barre omnibus
CN119890623A (zh) * 2025-03-27 2025-04-25 宁德时代新能源科技股份有限公司 电池单体、电池装置和用电设备

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JP2018073666A (ja) * 2016-10-31 2018-05-10 株式会社豊田自動織機 蓄電装置
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WO2019124108A1 (fr) * 2017-12-22 2019-06-27 パナソニックＩｐマネジメント株式会社 Stratifié d'éléments
WO2019188214A1 (fr) * 2018-03-28 2019-10-03 パナソニックＩｐマネジメント株式会社 Barre omnibus et empilement de cellules
WO2020090216A1 (fr) * 2018-10-29 2020-05-07 三洋電機株式会社 Procédé de production d'une barre omnibus, barre omnibus et module de batterie
JP2020521287A (ja) * 2018-01-15 2020-07-16 エルジー・ケム・リミテッド ガス排出構造が形成されたバッテリーモジュール
US20200321595A1 (en) * 2016-05-30 2020-10-08 Samsung Sdi Co., Ltd. Battery module

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JP2012243689A (ja) * 2011-05-23 2012-12-10 Sanyo Electric Co Ltd 電源装置、電源装置を備える車両並びにバスバー
US20200321595A1 (en) * 2016-05-30 2020-10-08 Samsung Sdi Co., Ltd. Battery module
JP2018073666A (ja) * 2016-10-31 2018-05-10 株式会社豊田自動織機 蓄電装置
JP2018181780A (ja) * 2017-04-21 2018-11-15 矢崎総業株式会社 積層バスバおよび電池モジュール
WO2019124108A1 (fr) * 2017-12-22 2019-06-27 パナソニックＩｐマネジメント株式会社 Stratifié d'éléments
JP2020521287A (ja) * 2018-01-15 2020-07-16 エルジー・ケム・リミテッド ガス排出構造が形成されたバッテリーモジュール
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FR3150351A1 (fr) * 2023-06-26 2024-12-27 Renault S.A.S. Barre omnibus pour batterie d’accumulateurs, boitier de connexion mécatronique, bloc de batterie d’accumulateurs et véhicule automobile comprenant une telle barre omnibus
CN119890623A (zh) * 2025-03-27 2025-04-25 宁德时代新能源科技股份有限公司 电池单体、电池装置和用电设备

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