WO2018055677A1

WO2018055677A1 - Battery assembly and electroconductive member

Info

Publication number: WO2018055677A1
Application number: PCT/JP2016/077726
Authority: WO
Inventors: 敏徳内田; 清水　紀雄; 関野　正宏; 秀朗安井; 音也駒林
Original assignee: 株式会社東芝; 東芝インフラシステムズ株式会社
Priority date: 2016-09-20
Filing date: 2016-09-20
Publication date: 2018-03-29

Abstract

The battery assembly of an embodiment is provided with, e.g., an electroconductive member. The electroconductive member has a plate-shaped first terminal part, a plate-shaped second terminal part, and an elastically deformable plate-shaped bridge part having a first curved part connected to the first terminal part and a second curved part connected to the second terminal part. A melting part which melts due to heat including self-generated heat is provided between the first curved part and the second curved part of the bridge part, the melting part having cross-sections in the width direction of the bridge part and the thickness direction of the bridge part that are smaller than those of at least another section of the bridge part.

Description

Battery pack and conductive member

Embodiments of the present invention relate to an assembled battery and a conductive member.

Conventionally, an assembled battery including a conductive member that connects a plurality of batteries and a connection member such as a connector that exchanges power with an external device is known. As this type of conductive member, there is a member having two terminal portions and a bridge portion interposed between the two terminal portions, and a fusing portion that is melted by overcurrent is provided in the bridge portion.

JP 2013-196932 A

This type of conductive member is desired to have a novel configuration in which the bridge portion is easily elastically deformed while suppressing the length of the bridge portion in the direction along the terminal portion from being increased.

The assembled battery according to the embodiment includes, for example, a plurality of battery cells, a connection member, and a conductive member. Each of the plurality of battery cells has an electrode terminal portion as a connection target. The connection member is an object to be connected, and the conductive member is connected to the first object to be connected among the plurality of objects to be connected, and has a plate-like first terminal portion along the first direction, and the first The first direction of the plurality of connection objects is connected to the second connection object among the plurality of connection objects, and is positioned so as to be shifted from the first terminal part in the thickness direction intersecting the first direction of the one terminal part. A plate-like second terminal portion along the first, a first curved portion connected to the first terminal portion and a second curved portion connected to the second terminal portion, And a plate-like bridge portion that can be elastically deformed. A cross section along the width direction of the bridge portion and the thickness direction of the bridge portion between the first curved portion and the second curved portion of the bridge portion is at least another part of the bridge portion. A fusing part that is smaller than the cross section of the fusing part and that is fusing by heat including heat generated by self-heating is provided.

FIG. 1 is a schematic and exemplary perspective view of the assembled battery according to the first embodiment, and shows a state where the assembled battery is installed in an installation unit. FIG. 2 is a schematic and exemplary exploded perspective view of the assembled battery and the fixing structure of the first embodiment. FIG. 3 is a schematic and exemplary perspective view of the battery pack according to the first embodiment. FIG. 4 is a schematic and exemplary perspective view of the assembled battery according to the first embodiment, and shows a state in which the lid member is removed. FIG. 5 is a schematic and exemplary plan view of the assembled battery according to the first embodiment, and shows a state in which the lid member is removed. FIG. 6 is a schematic and exemplary side view of a part of the assembled battery according to the first embodiment. FIG. 7 is a schematic and exemplary cross-sectional view of a part of the assembled battery of the first embodiment. FIG. 8 is a schematic and exemplary perspective view of a conductive member of the battery pack according to the first embodiment. FIG. 9 is a schematic and exemplary side view of the conductive member of the battery pack according to the first embodiment. FIG. 10 is a schematic and exemplary plan view of a part of the assembled battery according to the first embodiment, and shows a state in which the lid member is removed. FIG. 11 is a schematic and exemplary perspective view of a part of the housing of the assembled battery according to the first embodiment, and shows a state in which a nut is supported by a support portion. FIG. 12 is a schematic and exemplary perspective view of a part of the housing of the assembled battery according to the first embodiment, in a state in which the nut is removed from the support portion. FIG. 13 is a schematic and exemplary perspective view of the nut of the battery pack according to the first embodiment. FIG. 14 is a schematic and exemplary perspective view of a conductive member of the battery pack according to the second embodiment. FIG. 15 is a schematic and exemplary perspective view of a conductive member of the battery pack according to the third embodiment. FIG. 16 is a schematic and exemplary side view of the conductive member of the battery pack according to the third embodiment. FIG. 17 is an enlarged view of a portion XVII in FIG. FIG. 18 is a schematic or exemplary perspective view of a conductive member of the assembled battery according to the fourth embodiment. FIG. 19 is a schematic and exemplary cross-sectional view of a part of the assembled battery of the fifth embodiment. FIG. 20 is an explanatory diagram for explaining elastic deformation of the conductive member of the assembled battery according to the fifth embodiment. FIG. 21 is a schematic and exemplary cross-sectional view of a part of the assembled battery of the fifth embodiment, showing a state where the conductive member is melted. FIG. 22 is a schematic and exemplary cross-sectional view of a part of the assembled battery according to the sixth embodiment. FIG. 23 is an explanatory diagram for explaining the elastic deformation of the conductive member of the assembled battery according to the sixth embodiment. FIG. 24 is a schematic and exemplary cross-sectional view of a part of the assembled battery of the sixth embodiment, showing a state where the conductive member is melted. FIG. 25 is a schematic and exemplary side view of the conductive member of the assembled battery according to the seventh embodiment. FIG. 26 is a schematic and exemplary side view of the conductive member of the assembled battery according to the eighth embodiment. FIG. 27 is a schematic and exemplary side view of the conductive member of the assembled battery according to the ninth embodiment. FIG. 28 is a schematic and exemplary side view of the conductive member of the battery pack of the tenth embodiment. FIG. 29 is a schematic and exemplary side view of the conductive member of the assembled battery according to the eleventh embodiment. FIG. 30 is a schematic and exemplary side view of the conductive member of the battery pack according to the twelfth embodiment. FIG. 31 is a schematic and exemplary perspective view of a part of the assembled battery according to the thirteenth embodiment, showing a state where a lid member is removed.

Hereinafter, exemplary embodiments of the present invention will be disclosed. The configuration of the embodiment shown below, and the operation and result (effect) brought about by the configuration are examples.

Also, the same components are included in the embodiments disclosed below. Therefore, below, the same code | symbol is provided to those similar components, and the overlapping description is abbreviate | omitted. In the following drawings, directions are defined for convenience. The X direction is the longitudinal direction of the housing 11 and the width direction of the battery cell 12. The Y direction is along the short direction of the housing 11 and is along the thickness direction of the battery cell 12. The Z direction is along the height direction of the housing 11 and the height direction of the battery cell 12. The X direction, the Y direction, and the Z direction are orthogonal to each other.

<First Embodiment>
As shown in FIGS. 1 and 2, the assembled battery 1 includes, for example, a housing 11, a plurality of battery cells 12,

conductive members

13 and 14, connectors 15 A and 15 B, and a circuit board 17. Yes. The battery cell 12, the

conductive members

13 and 14, the connectors 15 A and 15 B, and the circuit board 17 are accommodated in the housing 11. The plurality of battery cells 12 are electrically connected to each other by a plurality of conductive members 13. The power of the plurality of battery cells 12, that is, the power of the assembled battery 1 can be output to the external connector 100 (connection member) via the conductive member 14 and the

connectors

15A and 15B. Moreover, the assembled battery 1 can be fixed to the installation part 103 by the bracket 101 and the bolt 102. One of the

connectors

15A and 15B is a positive connector, and the other of the

connectors

15A and 15B is a negative connector. Hereinafter, the connector 15 may be used as a general term for the

connectors

15A and 15B. The assembled battery 1 can also be referred to as a battery module or a battery device. The housing 11 can also be referred to as a case or a container. The battery cell 12 may also be referred to as a single battery or a battery. The connector 15 is an example of a connection member and a connection target.

The battery cell 12 is configured as, for example, a lithium ion secondary battery. The battery cell 12 may be another battery such as a nickel metal hydride battery, a nickel cadmium battery, or a lead storage battery.

As shown in FIG. 2, the battery cell 12 is configured in a flattened rectangular parallelepiped shape that is thin in one direction (for example, the Y direction). The battery cell 12 includes a housing 21, a positive terminal portion 22 A, a negative terminal portion 22 B, and a valve portion 24. In the housing 21, an electrode body (not shown) and an electrolytic solution are accommodated. As an example, the electrode body can be formed by winding a positive electrode sheet and a negative electrode sheet, which are power generation elements, spirally through a separator. In addition, as an example, the electrode body can be formed by laminating a positive electrode sheet and a negative electrode sheet via a separator. The positive electrode terminal portion 22A and the negative electrode terminal portion 22B are connected to the positive electrode sheet and the negative electrode sheet of the electrode body, respectively. Hereinafter, the electrode terminal portion 22 may be used as a general term for the positive electrode terminal portion 22A and the negative electrode terminal portion 22B. The electrode terminal unit 22 is an example of a connection target.

As an example, the housing 21 is configured in a flat rectangular parallelepiped shape that is thin in one direction (for example, the Y direction). The casing 21 is made of a metal material (for example, aluminum, aluminum alloy, stainless steel, etc.) or a synthetic resin material. The housing | casing 21 is comprised by combining the container 21a and the cover body 21b. The container 21a is formed in a substantially rectangular parallelepiped box shape having an open upper part, and the electrode body and the electrolytic solution are housed in the container 21a. The lid 21b closes the opened upper part of the container 21a. The housing 21 can also be referred to as a container.

The positive terminal portion 22A and the negative terminal portion 22B are provided on the lid body 21b and protrude from the outer surface of the lid body 21b. The positive electrode terminal portion 22A and the negative electrode terminal portion 22B are arranged at an interval in the X direction, that is, the longitudinal direction of the lid 21b. The positive terminal portion 22A and the negative terminal portion 22B are each made of a conductive material.

The valve part 24 is provided between the positive terminal part 22A and the negative terminal part 22B in the lid 21b. The valve unit 24 is opened when the pressure in the housing 21 becomes higher than the threshold, and reduces the pressure in the housing 21.

The plurality of battery cells 12 are arranged in, for example, three rows in the housing 11. The plurality of battery cells 12 are arranged so that the outer surface of the lid 21b faces the same direction (for example, the Z direction), and the longitudinal direction of the lid 21b is along the same direction (for example, the X direction). Are arranged. The plurality of battery cells 12 are electrically connected in series or in parallel by a plurality of conductive members 13. The conductive member 13 is made of a conductive material such as aluminum. The conductive member 13 can also be referred to as a bus bar, a connection member, or a coupling member.

As shown in FIG. 3, the housing 11 has a rectangular parallelepiped appearance that is long in one direction (X direction). As shown in FIGS. 2 to 5, the casing 11 includes a bottom wall portion 11a,

end wall portions

11b and 11c,

side wall portions

11d and 11e, a top wall portion 11f, an intermediate wall portion 11g (see FIG. 2), and a partition. It has a plurality of wall portions (walls) such as a wall portion 11h (see FIG. 2). The end wall portion 11b is an example of a first outer wall portion, and the bottom wall portion 11a is an example of a second outer wall portion.

The bottom wall portion 11a is formed in a quadrangular (for example, rectangular) plate shape. The bottom wall portion 11a extends along the XY plane. The outer surface of the bottom wall portion 11a is formed in a planar shape.

The

end wall portions

11b and 11c are formed in a quadrangular (for example, rectangular) plate shape, and are connected to the end portion in the longitudinal direction (X direction) of the bottom wall portion 11a. Further, the

end wall portions

11b and 11c extend along a direction intersecting with the bottom wall portion 11a (an orthogonal direction, for example, a YZ plane). The

end wall portions

11b and 11c are provided substantially parallel to each other with an interval in the longitudinal direction (X direction) of the bottom wall portion 11a.

The

side wall portions

11d and 11e are formed in a quadrangular (for example, rectangular) plate shape, and are connected to an end portion in the short side direction (Y direction) of the bottom wall portion 11a. Further, the

side walls

11d and 11e extend along a direction intersecting with the bottom wall 11a (as an example, a direction orthogonal to the XZ plane). The

side wall parts

11d and 11e are provided substantially parallel to each other with an interval in the short direction (Y direction) of the bottom wall part 11a. The

side wall portions

11d and 11e are connected to the adjacent

end wall portions

11b and 11c.

The top wall 11f is formed in a quadrangular (for example, rectangular) plate shape. The top wall portion 11f is connected to the end portions of the

end wall portions

11b and 11c and the

side wall portions

11d and 11e opposite to the bottom wall portion 11a. The top wall portion 11f is provided at a distance from the bottom wall portion 11a in the thickness direction (Z direction) of the bottom wall portion 11a. The top wall portion 11f extends substantially parallel to the bottom wall portion 11a.

The intermediate wall portion 11g is formed in a quadrangular (for example, rectangular) plate shape. The intermediate wall portion 11g is located between the bottom wall portion 11a and the top wall portion 11f. The intermediate wall portion 11g extends substantially parallel to the bottom wall portion 11a and the top wall portion 11f. The intermediate wall portion 11g is connected to the inner surfaces of the

end wall portions

11b and 11c and the

side wall portions

11d and 11e.

The partition wall portion 11h is formed in a quadrangular (for example, rectangular) plate shape. The partition wall portion 11h is located between the bottom wall portion 11a and the intermediate wall portion 11g and connected to the bottom wall portion 11a. The partition wall portion 11h is provided side by side with the

end wall portions

11b and 11c. The partition wall portion 11h is provided substantially parallel to the

end wall portions

11b and 11c. Further, the plurality of partition wall portions 11h are arranged side by side (in parallel as an example) with their surfaces facing each other. The interval between the partition wall portions 11h is substantially constant.

The housing 11 is provided with a storage chamber 11i (see FIG. 2) surrounded by a bottom wall portion 11a,

end wall portions

11b and 11c,

side wall portions

11d and 11e, and an intermediate wall portion 11g. The storage chamber 11i is partitioned into a plurality of regions (chambers) by the partition wall portion 11h and the spacer 31, and one battery cell 12 is stored in each region.

Further, two protruding portions 11j are provided on the end wall portion 11b of the housing 11. The two protruding portions 11j are provided at the end portion of the end wall portion 11b on the top wall portion 11f side. The protruding portion 11j is provided across the end wall portion 11b and the top wall portion 11f. Each protruding portion 11j protrudes (protrudes) outside the outer surface 11ba of the end wall portion 11b. The two protruding portions 11j are provided in the lateral direction (Y direction) of the housing 11 with a space therebetween. The connector 15 is arrange | positioned at each of these protrusion parts 11j. The protruding portion 11j can also be referred to as an overhang portion.

The casing 11 is made of an insulating synthetic resin material (for example, modified PPE (polyphenylene ether), PFA (perfluoroalkoxyalkane, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), etc.). . Further, as the synthetic resin material of the housing 11, a thermoplastic resin can be used. For example, PE, olefin resin such as PP and PMP, polyester resin such as PET, PBT, and PEN, POM resin, PA6, and the like. Polyamide resins such as PA66, PA12, crystalline resins such as PPS resin, LCP resin and their alloy resins, or PS, PC, PC / ABS, ABS, AS, modified PPE, PES, PEI, PSF, etc. Non-crystalline resins and their alloy resins can be used.

2 and the like, the housing 11 is configured as a combination of a plurality of members, specifically, a container 41, an intermediate member 42, and a lid member 43. The intermediate member 42 is overlaid on one end of the container 41 and coupled to the container 41, and the lid member 43 is overlaid on one end of the intermediate member 42 and coupled to the intermediate member 42. The storage chamber 11 i is surrounded by the storage body 41 and the intermediate member 42.

The container 41 includes a bottom wall portion 11a,

end wall portions

41b and 41c included in the

end wall portions

11b and 11c,

side wall portions

41d and 41e included in the

side wall portions

11d and 11e, and a partition wall portion 11h. ,have. The container 41 is provided with an opening 41f (concave portion, space) surrounded by the bottom wall portion 11a,

end wall portions

41b and 41c, and

side wall portions

41d and 41e. The opening 41f constitutes at least a part of the accommodation chamber 11i.

The intermediate member 42 includes at least

end wall portions

42b and 42c included in the

end wall portions

11b and 11c,

side wall portions

42d and 42e included in the

side wall portions

11d and 11e, the intermediate wall portion 11g, and the protruding portion 11j. And have some. The intermediate member 42 covers the opening 41 f of the container 41. The intermediate wall portion 11g is connected to the intermediate portions of the

end wall portions

42b and 42c and the

side wall portions

42d and 42e in the thickness direction of the bottom wall portion 11a (Z direction, height direction of the housing 11). .

The lid member 43 includes a top wall portion 11f and at least a part of the protruding portion 11j.

The accommodating body 41 and the intermediate member 42 are mechanically coupled by the coupling portion 44, and the intermediate member 42 and the lid member 43 are mechanically coupled by the coupling portion 45. That is, the container 41 and the lid member 43 are coupled via the intermediate member 42. The coupling portion 44 is configured such that a plurality of claws provided on the

end wall portions

42b and 42c and the

side wall portions

42d and 42e of the intermediate member 42 are hooked on the

end wall portions

41b and 41c and the

side wall portions

41d and 41e of the container 41, The intermediate member 42 and the container 41 are combined. Further, the coupling portion 45 couples the lid member 43 and the intermediate member 42 by a plurality of claws provided on the lid member 43 being hooked on the

side wall portions

42 d and 42 e of the intermediate member 42.

In the casing 11 having the above-described configuration, as described above, the plurality of battery cells 12 are accommodated in the opening 41f of the accommodating body 41 constituting a part of the accommodating chamber 11i. An insulating spacer 31 is disposed between the adjacent battery cells 12. The spacer 31 separates two adjacent battery cells 12. The spacer 31 is a sheet formed of, for example, an insulating material. The spacer 31 can also be referred to as a partition wall (wall).

Further, the positive electrode terminal portion 22A and the negative electrode terminal portion 22B of the battery cell 12 pass through a through hole (opening portion) provided in the intermediate wall portion 11g and protrude toward the top wall portion 11f side of the intermediate wall portion 11g. .

A plurality of

conductive members

13, 14,

connectors

15A, 15B, a circuit board 17, a plate member 18, and the like are accommodated in an accommodation chamber 11k (space) provided between the intermediate wall portion 11g and the top wall portion 11f. Has been. For example, the

conductive members

13 and 14 are welded to the electrode terminal portions 22 (the positive terminal portion 22A and the negative terminal portion 22B) of the battery cell 12. The

connectors

15A and 15B are coupled to the intermediate member 42 by a coupling tool 46 such as a screw. The circuit board 17 is coupled to the lid member 43 by a coupling tool 46 such as a screw.

The circuit board 17 is, for example, a printed circuit board (PCB). The circuit board 17 is provided with a wiring pattern, and a plurality of electronic components are mounted thereon. The circuit board 17 is electrically connected to the conductive member 13 and the like, and can detect the temperature of the conductive member 13, the voltage of the battery cell 12, and the like. In addition, two (a plurality of) connectors 48 are mounted on the circuit board 17. The connector 48 is, for example, a LAN connector (communication connector). The connector 48 is exposed from an opening 42b1 provided in the end wall 42b of the intermediate member 42. The connector 48 is disposed between the two protrusions 11j, that is, between the two

connectors

15A and 15B. For example, the connector 48 of the LAN cable (see FIG. 1) is connected to the connector 48. For example, the control device receives the detection result of the circuit board 17 and controls the voltage of the battery cell 12 via the LAN cable.

Next, the connector 15, the conductive member 14, and the protrusion 11j will be described in detail. Since the two conductive members 14, the two connectors 15, and the two protruding portions 11j have the same configuration, one of the conductive members (side wall portion 11d side, front side in FIG. 2) will be described below. 14, the connector 15, and the protrusion part 11j are mainly demonstrated.

As shown in FIGS. 6 and 7, the projecting portion 11j has a bottom wall portion 11ja, an end wall portion 11jb, side wall portions 11jd and 11je, and a top wall portion 11jf. The bottom wall portion 11ja extends from the intermediate wall portion 11g. The side wall part 11jd extends from the side wall part 11d (side wall part 42d). The side wall part 11je is located on the side opposite to the Y direction of the side wall part 11jd (side wall part 11e side), and is provided at an interval in the Y direction from the side wall part 11jd. The top wall portion 11jf extends from the top wall portion 11f. The end wall portion 11jb is connected to the bottom wall portion 11ja, the side wall portions 11jd and 11je, and the top wall portion 11jf. In the other of the two protruding portions 11j (side wall portion 11e side, back side in FIG. 2), the side wall portion 11je extends from the side wall portion 11e (side wall portion 42e), and the side wall portion 11jd 11je in the Y direction (side wall portion 11d side).

The protrusion 11j has an end face 11jj in the protrusion direction of the protrusion 11j (as an example, the direction opposite to the X direction, the right direction in FIG. 7). The end surface 11jj constitutes the outer surface of the end wall portion 11jb. Further, a chamber 11jh (a space, a storage chamber) is provided in the protruding portion 11j. The chamber 11jh opens to the end face 11jj. The chamber 11jh includes an opening 11ji that passes through the end wall 11jb (end surface 11jj). The room 11jh communicates with the accommodation room 11k.

In this embodiment, the connector 15 is a female connector, and the external connector 100 is a male connector. The connector 15 has an insulating body 15a and a conductive member 15b supported by the body 15a. The body 15a has an opening 15c. The external connector 100 is inserted into the opening 15c, and the connector 15 and the external connector 100 are fitted together. In the present embodiment, the insertion direction (mounting direction, mounting direction) of the external connector 100 to the connector 15 is the opposite direction (X direction) to the protruding direction of the protruding portion 11j. That is, the external connector 100 is attached to the connector 15 by moving in the direction opposite to the protruding direction of the protruding portion 11j (X direction). The body 15a is made of a synthetic resin material. In FIG. 7, the internal structure of the connector 15 is schematically shown. Further, the connector 15 may be a male connector and the external connector 100 may be a female connector.

The conductive member 15b is supported by the body 15a in a state where a part thereof is embedded in the body 15a. The conductive member 15b is electrically connected to a terminal portion provided in the body 15a. The terminal portion is electrically connected to the terminal portion of the external connector 100. The conductive member 15b has a terminal portion 15d protruding from the body 15a on the opposite side of the opening 15c of the body 15a. The terminal portion 15d is configured in a flat plate shape. The terminal portion 15 d is electrically connected to the electrode terminal portion 22 through the conductive member 14. The conductive member 15b is made of a conductive material such as aluminum. The conductive member 15b can also be referred to as a bus bar, a connection member, or a coupling member.

The connector 15 has an opening 15c exposed from the opening 11ji of the projecting portion 11j, and the body 15a and the terminal portion 15d are aligned in the thickness direction (X direction) of the end wall portion 11b. Some are housed. In the present embodiment, as an example, a part of the body 15a is accommodated in the chamber 11jh, and the other part of the body 15a and the terminal portion 15d are accommodated in the accommodation chamber 11k. Note that the entire body 15a and the entire connector 15 may be accommodated in the chamber 11jh. In the body 15a, both side portions in the Y direction of the body 15a are coupled to at least one of the intermediate wall portion 11g and the bottom wall portion 11ja by a coupling tool 46. At this time, the body 15a is pressed against the protrusion 11l protruding toward the connector 15 from the intermediate wall portion 11g and the bottom wall portion 11ja. That is, the body 15a is supported by the protrusion 11l.

As shown in FIGS. 7 to 9, the conductive member 14 has two

terminal portions

14a and 14b, a bridge portion 14c interposed between the

terminal portions

14a and 14b, and a connection piece 14i (see FIG. 10). Yes. 8 and 9, the connection piece 14i is not shown. The terminal portion 14a is an example of a second terminal portion, and the terminal portion 14b is an example of a first terminal portion.

The terminal portion 14a is electrically connected to two electrode terminal portions 22 having the same pole. The terminal portion 14a is formed in a flat plate shape along the D1 direction (XY plane). The D1 direction is a direction along the X direction and is opposite to the X direction. The terminal part 14a has two individual terminal parts 14aa, and the electrode terminal part 22 is connected to each of these individual terminal parts 14aa. Each individual terminal portion 14aa is provided with a hole 14ab. In a state where the terminal portion 14a and the electrode terminal portion 22 are overlapped, a portion around the hole 14ab of the terminal portion 14a is welded (coupled) to the electrode terminal portion 22. A connecting piece 14i extends from the edge of the terminal portion 14a. The connection piece 14 i is connected to the circuit board 17. The D1 direction is an example of a first direction. The individual terminal portion 14aa can also be referred to as a wall portion.

The terminal portion 14b is electrically connected to the connector 15. The terminal part 14a and the terminal part 14b are located away from each other in the Z direction. The terminal portion 14b is formed in a flat plate shape along the D1 direction (XY plane). The terminal part 14b is comprised by one wall part 14ba. The terminal portion 14b (wall portion 14ba) has two surfaces 14bb and 14bc. At least a part of the surface 14bb is overlapped with the terminal portion 15d of the connector 15 and is in contact with the terminal portion 15d (see FIG. 7). A region 14be that overlaps and contacts the terminal portion 15d on the surface 14bb is a region that transmits and receives electricity to and from the connector 15. 8 and 9, a part of the end portion of the region 14be is indicated by a one-dot chain line. The terminal portion 14b is provided with a hole 14bd penetrating the surfaces 14bb and 14bc. A male screw member 49 described later is inserted into the hole 14bd (see FIG. 7).

The terminal portion 14a and the terminal portion 14b are positioned so as to be shifted from each other in the thickness direction (Z direction) of the

terminal portions

14a and 14b. The thickness direction intersects the D1 direction.

The bridge part 14c is provided over the terminal part 14b and the terminal part 14a. The bridge portion 14c is formed in a plate shape and can be elastically deformed. The bridge portion 14c is configured to be meltable by heat including self-generated heat.

8 and 9, the bridge portion 14c has a pair of end portions 14ca and 14cb and a pair of surfaces 14cc and 14cd. The pair of end portions 14ca and 14cb are both ends in the width direction of the bridge portion 14c and extend in the length direction of the bridge portion 14c. That is, the end portions 14ca and 14cb extend over the terminal portion 14a and the terminal portion 14b. Further, the pair of surfaces 14cc and 14cd are provided across both end portions 14ca and 14cb. The surface 14cc is connected to the surface 14bb, and the surface 14cd is connected to the surface 14bc.

Further, the bridge portion 14c has two (plural) convex portions 14ce and 14cf, and is configured in a substantially S shape. The convex portions 14ce and 14cf are provided between the terminal portion 14a and the terminal portion 14b, and are arranged in the Z direction.

The convex portion 14ce is connected to the terminal portion 14b. The convex portion 14ce is bent into a shape that is convex in the D1 direction with respect to the terminal portion 14b, and is configured in a substantially U shape (curved shape) that is open in the direction opposite to the D1 direction. The convex portion 14ce has two curved portions 14ce1 and 14ce2 and a wall portion 14ce3. In FIG. 8, for the sake of understanding, boundary portions such as the curved portions 14ce1 and 14ce2 and the wall portion 14ce3 are indicated by alternate long and short dash lines. The curved portion 14ce1 is connected to the terminal portion 14b through the wall portion 14ce4. Wall part 14ce4 is comprised by the flat plate shape extended along the extension direction (X direction) of the terminal part 14b. The curved portion 14cf1 is connected to the convex portion 14cf. The wall portion 14ce3 is interposed between the two curved portions 14ce1 and 14ce2. Wall part 14ce3 is comprised by the flat plate shape. The music part 14ce1 is an example of a first music part.

The convex portion 14cf is connected to the terminal portion 14a. The convex portion 14cf is interposed between the convex portion 14ce and the terminal portion 14a, is bent into a shape that is convex in the opposite direction (X direction) of the D1 direction with respect to the terminal portion 14a, and D1 It is comprised in the substantially U shape (curved shape) open | released in the direction. The convex portion 14cf is composed of one curved portion 14cf1. The music part 14cf1 is an example of a second music part.

In the present embodiment, at least one (for example, both) of both end portions 14ca and 14cb of the wall portion 14ce3 of the convex portion 14ce are provided with concave portions 14ch1 and 14ch2 that are recessed in the width direction of the bridge portion 14c. Yes. A portion between the concave portions 14ch1 and 14ch2 of the bridge portion 14c constitutes a fusing portion 14cg. That is, the fusing part 14cg is provided on the top of the convex part 14ce. The fusing part 14cg is provided over the end part 14ca and the end part 14cb and is fused by heat including heat generated by self-heating. The area of the cross section of the fusing part 14cg along the width direction and the thickness direction of the bridge part 14c (hereinafter also referred to as a vertical cross section) is larger than the area of the vertical cross section of the portion around the fusing part 14cg in the bridge part 14c. small. In the present embodiment, the longitudinal section of the fusing part 14cg is smaller than the longitudinal section of the other part of the bridge part 14c. Since the fusing part 14cg has a relatively large electric resistance, when an overcurrent flows, the fusing part 14cg self-heats and fusing. That is, the bridge portion 14c (melting portion 14cg) functions as a fuse. The convex portion 14ce is an example of a first convex portion, and the convex portion 14cf is an example of a second convex portion. The fusing part 14cg may also be referred to as a small cross-sectional part, a high resistance part, a fusing scheduled part, or a fusing possible part.

In the present embodiment, the bridge portion 14c and the terminal portion 14b are arranged so as to be shifted in the Y direction. As an example, the terminal portion 14b is positioned near the end portion 14ca of the end portion 14ca and the end portion 14cb of the bridge portion 14c. Accordingly, steps 14f and 14g are formed at the connection portion between the terminal portion 14b and the bridge portion 14c.

In the bridge portion 14c, the convex portions 14ce and 14cf can function as elastic portions (spring portions). For example, the convex portions 14ce and 14cf are elastically deformed when the terminal portion 15d vibrates in the Z direction with the connector 15 as a fulcrum where the connector 15 is fixed. Thereby, the stress concentration in the

terminal portions

14a, 14b, 15d and the electrode terminal portion 22 is easily relaxed. Moreover, it is easy to absorb the mounting tolerance of the conductive member 14. The shape of the convex portions 14ce and 14cf may be other than the U-shape (curved shape). For example, the shape of the convex portions 14ce and 14cf may be substantially V-shaped. The conductive member 14 is made of a conductive material such as aluminum. The conductive member 14 can also be referred to as a bus bar, a connection member, or a coupling member.

As shown in FIG. 10, the conductive members 14 A and 14 B are plane symmetric with respect to a plane P 1 passing through the center of the housing 11 in the Y direction and orthogonal to the Y direction. The conductive members 14 A and 14 B are arranged such that their end portions 14 ca are oriented toward the center of the housing 11 in the Y direction. A part of the circuit board 17 is disposed between the

conductive members

14A and 14B. That is, the conductive member 14 is provided in such a posture that the end portion 14 ca faces the circuit board 17. The circuit board 17 is an example of an electrical component.

Further, as shown in FIGS. 8 and 9, the conductive member 14 is provided with a heat transfer section 60. The heat transfer unit 60 is configured to perform heat transfer so that the temperature of the end portion 14ca of the bridge portion 14c is higher than the temperature of the end portion 14cb opposite to the end portion 14ca.

The heat transfer part 60 has an asymmetric part 14e included in the first part 14d from the terminal part 14b to the bridge part 14c in the conductive member 14. The asymmetric part 14e includes a terminal part 14b. The asymmetric part 14e is formed in an asymmetric shape with respect to a plane P2 (see FIG. 10) passing through the center of the fusing part 14cg in the width direction (Y direction) of the bridge part 14c and orthogonal to the width direction of the bridge part 14c.

In the conductive member 14 configured as described above, for example, when an overcurrent flows from the connector 15 to the conductive member 14 due to a short circuit outside the assembled battery 1, the fusing part 14cg is blown by heat including heat generated by self-heating. To do. At this time, the heat generated by the electrical resistance between the terminal portion 14 b and the terminal portion 15 d of the connector 15 is transmitted to the fusing portion 14 cg via the asymmetric portion 14 e of the heat transfer portion 60. Since the terminal part 14b constituting the asymmetric part 14e is positioned closer to the end part 14ca of the end part 14ca and the end part 14cb of the bridge part 14c, the temperature of the end part 14ca of the bridge part 14c is changed to the end part. Heat transfer is performed so as to be higher than the temperature of the end portion 14cb on the opposite side of 14ca. Thereby, in fusing part 14cg, end part 14ca which reached predetermined temperature earlier than end part 14cb becomes fusing start position S1 (refer to Drawing 8), and begins fusing from the fusing start position S1. That is, the fusing direction of the fusing part 14cg is a direction from the end part 14ca toward the end part 14cb. At this time, fumes generated by fusing flow in the direction D2 along the fusing progress direction. Since the conductive member 14 is provided such that the end portion 14ca faces the circuit board 17, the fumes flow toward the side opposite to the circuit board 17, that is, toward the

side wall portions

11d and 11e. Therefore, the fumes are prevented from being scattered on the circuit board 17. At this time, the heat generated by the electrical resistance between the terminal portion 14a and the electrode terminal portion 22 of the battery cell 12 is smaller than the heat generated by the electrical resistance between the terminal portion 14b and the terminal portion 15d of the connector 15. . For this reason, in this embodiment, among the fusing part 14cg and the top part of the convex part 14cf, the fusing part 14cg that is close to the terminal part 14b and has a higher temperature is fused. Further, in the present embodiment, for example, after fusing, the lower part of the fusing part 14cg in the bridge part 14c, that is, the part including the convex part 14cf falls down (in the opposite direction to the Z direction) due to its own weight (deformation). To do). As a result, the distance between the upper part of the fusing part 14cg in the bridge part 14c (the part including the curved part 14ce1) and the lower part of the fusing part 14cg in the bridge part 14c tends to increase.

As shown in FIG. 7, the terminal portion 15 d of the connector 15 and the terminal portion 14 b of the conductive member 14 are coupled by a nut 47 and a male screw member 49. The nut 47 and the male screw member 49 are accommodated in the casing 11 (accommodating chamber 11k) and connected to each other. Specifically, the terminal portion 15 d of the connector 15, the terminal portion 14 b of the conductive member 14, and the washer 70 are sandwiched between the nut 47 and the male screw member 49 in the Z direction.

As shown in FIGS. 11 and 13, the nut 47 has a cylindrical portion 47a into which the male screw member 49 is inserted and a flange portion 47b. The cylindrical portion 47a is formed in an annular shape (as an example, a cylindrical shape) around the central axis Ax. The central axis Ax is along the Z direction. A female screw portion 47c is provided on the inner side (inner peripheral portion) of the cylindrical portion 47a. The nut 47 can be made of a metal material such as brass or iron, for example. Further, the surface of the nut 47 can be plated with nickel or the like.

The flange portion 47b protrudes from the end portion in the Z direction of the cylindrical portion 47a to the outside in the radial direction of the cylindrical portion 47a. The flange portion 47 b has a surface 47 d that constitutes an end surface of the nut 47 in the Z direction. The terminal portion 14b of the conductive member 14 and the terminal portion 15d of the conductive member 15b are overlaid on the surface 47d (see FIG. 7). The surface 47d is an example of a first surface.

Further, the flange portion 47b is configured to be non-circular when viewed in a direction along the axial direction (Z direction) of the central axis Ax. That is, the outer peripheral surface 47e around the central axis Ax of the flange portion 47b has a plurality of portions whose distances from the central axis Ax in the direction orthogonal to the central axis Ax are different from each other when viewed in the direction along the central axis Ax. . In the present embodiment, for example, the flange portion 47b is configured as a hexagon (polygon) when viewed in the direction along the central axis Ax.

The nut 47 is supported by the support portion 11ga so as to be movable in the axial direction (Z direction) of the central axis Ax. As shown in FIGS. 7, 11, and 12, the support portion 11 ga is provided on the intermediate wall portion 11 g of the housing 11. The support portion 11ga is provided with an opening portion 11gb (through hole). A nut 47 is accommodated in the opening 11gb.

The support portion 11ga has an end surface 11gc in the protruding direction of the support portion 11ga and surfaces 11gd, 11ge, and 11gf constituting the inner surface of the support portion 11ga. The end including the surface 47d of the nut 47 protrudes from the end surface 11gc. The surfaces 11gd, 11ge, and 11gf face the opening 11gb. The surface 11gd is configured in a shape (cylindrical shape) along the outer peripheral surface of the cylindrical portion 47a of the nut 47, and surrounds the cylindrical portion 47a. The surface 11ge is configured in a shape (non-circular, for example, hexagonal) along the outer peripheral surface 47e of the flange portion 47b of the nut 47, and surrounds the outer peripheral surface 47e. The surface 11gf is provided between the surface 11gd and the surface 11ge and extends along the XY plane. The surface 11gf supports the flange portion 47b on one side (Z direction) in the axial direction of the central axis Ax. The surface 11ge is an example of a second surface.

The support portion 11ga configured as described above supports the nut 47 so as to be movable in the axial direction (Z direction) of the central axis Ax. Further, the rotation of the nut 47 around the central axis Ax is limited in a state where the surface 11ge is in contact with the outer peripheral surface 47e.

Here, in the present embodiment, the support portion 11ga can be integrally formed with the intermediate member 42 by resin molding. For this reason, the surface 11gd is configured in a tapered shape so that its diameter (cylinder diameter) increases toward the end surface 11gc. That is, a draft angle is provided on the surface 11gd. On the other hand, the diameter of the surface 11ge is constant. With such a configuration, the shape defect of the support portion 11ga is suppressed, and the contact area between the surface 11gd and the outer peripheral surface 47e of the flange portion 47b is suppressed from decreasing.

1, the cable 104 connected to the external connector 100 is connected to the lower end of the end wall portion 11b along the end wall portion 11b in a state where the external connector 100 and the connector 15 are connected. It extends toward the portion 11s. That is, the cable 104 extends in a direction intersecting with the insertion direction (X direction) of the external connector 100 to the connector 15. A gap is provided between the cable 104 and the outer surface 11ba of the end wall portion 11b.

Further, as shown in FIG. 1, the assembled battery 1 is fixed to the installation portion 103 by, for example, a bracket 101 and a bolt 102. The installation part 103 is formed in, for example, a rectangular (square) plate shape extending along the bottom wall part 11 a of the housing 11. The installation unit 103 can also be referred to as a support member, a heat dissipation member, a tray member, a shelf member, a slide member, or the like. The assembled battery 1, the bracket 101, and the installation unit 103 are examples of battery units. In the present embodiment, for example, a plurality of battery units can be arranged in the Y direction in the same posture. The installation unit 103 is an example of a second support member.

The bracket 101 has, for example, a bottom wall portion 101a and a standing wall portion 101b. The bottom wall portion 101 a is formed in a rectangular plate shape extending along the installation portion 103. As shown in FIG. 2, the bottom wall 101a is provided with an opening 101c through which the bolt 102 passes. The standing wall portion 101b is formed in a rectangular plate shape extending along the

end wall portions

11b and 11c of the housing 11, and is connected to the end portions on the

end wall portions

11b and 11c side of the bottom wall portion 101a. Yes. The standing wall 101b is provided with an opening 101d through which the bolt 102 passes. The bracket 101 is formed in a substantially L shape in the line of sight in the Y direction by the bottom wall portion 101a and the standing wall portion 101b connected to each other. The bracket 101 is an example of a first support member, and may be referred to as an attachment member, a fixing member, or the like.

2 and 6, the

end wall portions

11b and 11c of the casing 11 are provided with a plurality of nuts 51, respectively. The nut 51 is provided with a second screw portion 51c (see FIG. 3) that can be connected to the first screw portion 102a (see FIG. 2) of the bolt 102. The first screw portion 102 a is a male screw portion formed on the outer surface of the shaft portion of the bolt 102, and the second screw portion 51 c is a female screw portion formed on the inner surface of the tube portion 51 a of the nut 51. . The nut 51 is configured integrally with the housing 11 by, for example, insert molding. The nut 51 is fixed to the

end wall portions

11 b and 11 c with at least the second screw portion 51 c exposed to the outside of the housing 11. In the present embodiment, the casing 11 is supported (fixed) to the bracket 101 by the bolts 102 being coupled to these nuts 51 with the upright wall portion 101b (see FIG. 1) sandwiched therebetween. Further, the bolts 102 are coupled to a nut that can be provided on the back side of the installation portion 103 with the installation portion 103 and the bottom wall portion 101 a interposed therebetween, whereby the bracket 101 is fixed to the installation portion 103. With such a configuration, the housing 11 (the assembled battery 1) is fixed to the installation unit 103 via the bracket 101. The bracket 101 and the bolt 102 are an example of a fixing structure. The bolt 102 that couples the bottom wall portion 101a to the installation portion 103 may be a screw.

Further, a sheet-like heat conduction member can be provided between the bottom wall portion 11 a of the housing 11 and the installation portion 103. A heat conductive member is comprised by the synthetic resin material etc. in which the heat conductive filler (metal material) contained, for example. In a state where the bracket 101 is attached to the housing 11, the lower surface of the bottom wall portion 11a and the lower surface of the bottom wall portion 101a are arranged along the same plane. In the present embodiment, for example, by connecting the bolt 102 and the nut 51 in a state where the two bottom wall portions 101a arranged in the X direction are pressed against the installation portion 103 side, the bottom wall portion 11a and the installation portion 103 are connected. The heat conducting member is compressed in the Z direction. As a result, the bottom wall portion 11a and the heat conduction member are more likely to be in close contact with each other, and the heat conduction member and the installation portion 103 are more likely to be in close contact with each other. Therefore, for example, the heat of the plurality of battery cells 12 accommodated in the housing 11 is easily transmitted effectively by the installation portion 103 via the bottom wall portion 11a and the heat conducting member. In addition, a heat conductive member is not limited to a heat conductive sheet, For example, grease, an adhesive agent, etc. may be sufficient.

As described above, in the present embodiment, the conductive member 14 is provided with the fusing part 14cg between the curved part 14ce1 (first curved part) and the curved part 14ce2 (second curved part). ing. The fusing part 14cg has a longitudinal section along the width direction of the bridge part 14c and a thickness direction of the bridge part 14c smaller than at least another part of the longitudinal section of the bridge part 14c, and is melted by heat including self-heated heat. To do. Therefore, according to this embodiment, compared with the case where the fusing part 14cg is provided in the wall part 14ce4 of the bridge part 14c extending in the extending direction of the terminal part 14b from the terminal part 14b, the terminal part of the bridge part 14c is provided. It is easy to prevent the length in the direction (X direction) along 14b from being increased. Moreover, since the longitudinal section of the fusing part 14cg is smaller than at least some other longitudinal sections of the bridge part 14c, the bridge part 14c is easily elastically deformed.

Moreover, in this embodiment, the fusing part 14cg is provided in the wall part 14ce3. Therefore, for example, after fusing, the lower part of the fusing part 14cg in the bridge part 14c, that is, the part including the convex part 14cf falls down (deforms) by its own weight (opposite to the Z direction). As a result, the distance between the upper part of the fusing part 14cg in the bridge part 14c (the part including the curved part 14ce1) and the lower part of the fusing part 14cg in the bridge part 14c tends to increase. Therefore, it is possible to suppress the occurrence of arc discharge between the upper part of the melted part 14cg in the bridge part 14c and the lower part of the melted part 14cg in the bridge part 14c after the melting.

Moreover, in this embodiment, the heat-transfer part 60 is provided in the 1st part 14d (1st part) from the terminal part 14b (1st terminal part) in the electrically-conductive member 14 to the bridge | bridging part 14c, for example. Yes. And the heat transfer part 60 performs heat transfer so that the temperature of the edge part 14ca of the bridge part 14c becomes higher than the temperature of the edge part 14cb. Therefore, the fusing part 14cg of the conductive member 14 starts fusing from the end part 14ca (melting start position S1) that reaches a predetermined temperature earlier than the end part 14cb. Thus, according to this embodiment, fusing can be started from a specific location (end portion 14ca).

In the present embodiment, for example, the conductive member 14 has a fusing part 14cg provided over the terminal part 14b and the terminal part 14a and fusing by heat including heat generated by self-heating. And the heat-transfer part 60 is contained in the 1st part 14d, and has the asymmetrical part 14e of asymmetrical shape regarding the plane P2. Therefore, according to the present embodiment, heat transfer is performed such that the temperature of the end portion 14ca of the bridge portion 14c is higher than the temperature of the end portion 14cb depending on the shape of the conductive member 14. Therefore, since it is not necessary to provide a member different from the conductive member 14 in the heat transfer unit 60, the configuration of the heat transfer unit 60 is easily simplified.

In the present embodiment, for example, the terminal portion 14b is positioned closer to the end portion 14ca of the end portion 14ca and the end portion 14cb. Therefore, according to the present embodiment, since the shape of the bridge portion 14c does not need to be asymmetric with respect to the plane P2, the shape of the bridge portion 14c is easily simplified.

In this embodiment, for example, the connector 15 (first connector) is provided on the protruding portion 11j. Therefore, according to the present embodiment, for example, the position of the connector 15 is easily understood. Further, for example, it is easy to connect the external connector 100 (second connector) to the connector 15. For example, it is easy to suppress that the cable 104 connected to the external connector 100 contacts the outer surface 11ba of the end wall portion 11b. In addition, for example, the degree of freedom of arrangement of the cable 104 is easily improved.

In the present embodiment, for example, the support portion 11ga supports the nut 47 so as to be movable in the axial direction of the central axis Ax of the nut 47 (first nut). Therefore, according to the present embodiment, even when a load is applied to the conductive member 14 due to vibration or the like when the assembled battery 1 is assembled or when the assembled battery 1 is mounted on a moving body such as a vehicle, the conductive member together with the nut 47 is used. Since 14 and 15b can move, the stress concentration at the

terminal portions

14a, 14b and 15d of the

conductive members

14 and 15b is easily relaxed. Even if there is a variation in the arrangement of the connector 15 or the battery cell 12, the variation is easily absorbed by the movement of the nut 47.

<Other embodiments>
Next, second to thirteenth embodiments shown in FIGS. 14 to 31 will be described. The assembled batteries of the second to thirteenth embodiments have the same configuration as the assembled battery 1 of the first embodiment. Therefore, according to this embodiment, the same result (effect) based on the same configuration as that of the first embodiment can be obtained. In the following, in the assembled batteries of the second to thirteenth embodiments, different configurations from the first embodiment will be mainly described.

<Second Embodiment>
In the conductive member 14 of the present embodiment shown in FIG. 14, the recesses 14ch1 and 14ch2 are provided in the curved portion 14ce1 of the bridge portion 14c, and the fusing portion 14cg is provided in the curved portion 14ce1.

<Third Embodiment>
In the conductive member 14 of this embodiment shown in FIGS. 15 to 17, at least one of the surfaces 14 cc and 14 cd (the surface 14 cc as an example) of the wall portion 14 ce 3 of the bridge portion 14 c is the width direction (Y direction) of the bridge portion 14 c. A recess 14ch3 extending in the direction is provided. The recess 14ch3 is recessed in the thickness direction of the bridge portion 14c. A fusing part 14cg is provided facing the concave part 14ch3.

<Fourth Embodiment>
In the conductive member 14 of this embodiment shown in FIG. 18, the recesses 14ch1, 14ch2 described in the second embodiment and the recess 14ch3 described in the third embodiment are provided in the wall 14ce3. A fusing part 14cg is provided in the wall part 14ce3.

<Fifth Embodiment>
In the present embodiment shown in FIGS. 19 to 21, the conductive member 14 is provided in an elastically deformed state (see FIG. 19). FIG. 20 shows the dimensions of each part when the conductive member 14 is in a free state (non-deformed state) for explanation. As shown in FIG. 20, the height H 1 of the conductive member 14 in the free state is smaller than the height H 2 of the lower surface of the terminal portion 15 d of the connector 15 from the electrode terminal portion 22 of the battery cell 12. That is, in the present embodiment, the conductive member 14 is attached in a state of being pulled and deformed. For example, the conductive member 14 is in a state in which at least the convex portion 14ce extends vertically (see FIG. 19). In such a state, when the fusing part 14cg is fusing (see FIG. 21), the conductive member 14 is not pulled and the distance between the upper part of the fusing part 14cg and the lower part of the fusing part cg is increased accordingly. . Therefore, generation | occurrence | production of arc discharge is suppressed more.

<Sixth Embodiment>
In this embodiment shown in FIGS. 22 to 24, like the fifth embodiment, the conductive member 14 is provided in an elastically deformed state (see FIG. 22). However, in the present embodiment, the nut 47 is fixed to the support portion 11ga (housing 11). FIG. 23 shows the dimensions of each part when the conductive member 14 is in a free state (non-deformed state) for explanation. As shown in FIG. 23, the height H1 of the conductive member 14 in the free state is smaller than the height H2 of the lower surface of the terminal portion 15d of the connector 15 from the electrode terminal portion 22 of the battery cell 12. Further, the height H3 of the upper surface of the nut 47 from the electrode terminal portion 22 is smaller than the height H2. That is, in the present embodiment, the conductive member 14 is attached in a state of being pulled and deformed. For example, the conductive member 14 is in a state in which at least the convex portion 14ce extends vertically (see FIG. 22). When the fusing part 14cg is fused in such a state (see FIG. 24), the conductive member 14 is not pulled and the distance between the upper part of the fusing part 14cg and the lower part of the fusing part cg is widened accordingly. . Therefore, generation | occurrence | production of arc discharge is suppressed more between the upper part of the fusing part 14cg, and the lower part of the fusing part 14cg.

<Seventh Embodiment>
In the conductive member 14 of this embodiment shown in FIG. 25, the recesses 14ch1 and 14ch2 are not provided. In the present embodiment, a fusing part 14cg is provided in the curved part 14ce1. When the plate member is bent to form the curved portion 14ce1, the fusing portion 14cg is configured by a portion in which the plate member is thinned by extending the plate member.

<Eighth Embodiment>
The bridge portion 14c of the conductive member 14 of the present embodiment shown in FIG. 26 has two curved portions 14ce5 and 14ce6 and a wall portion 14ce7, and is configured in a substantially Z shape. The curved portion 14ce5 (first curved portion) is connected to the end portion 14bf of the terminal portion 14b in the D1 direction. The curved portion 14ce6 (second curved portion) is connected to the end portion 14ac of the terminal portion 14a in the direction opposite to the D1 direction. The wall portion 14ce7 is interposed between the curved portion 14ce5 and the curved portion 14ce6, and proceeds in the direction opposite to the D1 direction (X direction) from the curved portion 14ce5 toward the curved portion 14ce6. In the present embodiment, the curved portion 14ce5 is provided with a fusing portion 14cg.

<Ninth Embodiment>
As in the eighth embodiment, the bridge portion 14c of the conductive member 14 of the present embodiment illustrated in FIG. 27 has two curved portions 14ce5 and 14ce6 and a wall portion 14ce7. However, in the present embodiment, the wall portion 14ce7 is interposed between the curved portion 14ce5 and the curved portion 14ce6 and extends in a direction (Z direction) orthogonal to the D1 direction.

<Tenth Embodiment>
As in the eighth embodiment, the bridge portion 14c of the conductive member 14 of the present embodiment illustrated in FIG. 28 includes two curved portions 14ce5 and 14ce6 and a wall portion 14ce7. However, in this embodiment, the wall portion 14ce7 is interposed between the curved portion 14ce5 and the curved portion 14ce6, and proceeds in the D1 direction from the curved portion 14ce5 toward the curved portion 14ce6.

<Eleventh embodiment>
The bridge portion 14c of the conductive member 14 of the present embodiment shown in FIG. 29 has a convex portion 14ce (first convex portion) and a convex portion 14cf (second convex portion) in the Z direction (terminal The width (height) in the thickness direction of the portion 14b is different from each other. Further, the curvature of at least a part of the convex part 14ce is different from the curvature of at least a part of the convex part 14cf. In the present embodiment, the wall portion 14cn including the boundary portion between the convex portion 14ce and the convex portion 14cf is substantially along the D1 direction.

<Twelfth Embodiment>
As in the eleventh embodiment, the bridge portion 14c of the conductive member 14 of the present embodiment shown in FIG. 30 has a convex portion 14ce (first convex portion) and a convex portion 14cf (second convex shape). Part) are different from each other in width in the Z direction (thickness direction of the terminal part 14b). However, in this embodiment, wall part 14cn including the boundary part of convex-shaped part 14ce and convex-shaped part 14cf inclines with respect to D1 direction. Thereby, the part below the fusing part 14cg after fusing tends to fall toward the terminal part 14a.

<13th Embodiment>
In this embodiment shown in FIG. 31, a terminal block 80 is provided instead of the connector 15 of the first embodiment. The terminal block 80 is connected to the conductive member 14 and an external connection member (not shown).

Note that any two or more elements of the above embodiments may be combined within a technically feasible range.

As mentioned above, although embodiment of this invention was illustrated, the said embodiment is an example to the last, Comprising: It is not intending limiting the range of invention. The above embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. The above embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. The present invention can be realized by configurations other than those disclosed in the above embodiments, and various effects (including derivative effects) obtained by the basic configuration (technical features) can be obtained. is there. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) should be changed as appropriate. Can do. For example, the configuration of the conductive member 14 may be applied to the conductive member 13 that connects the battery cells 12 to each other.

Claims

A plurality of battery cells each having an electrode terminal portion as a connection target;
A connection member as a connection target;
A plate-shaped first terminal portion connected to the first connection target among the plurality of connection targets and extending in the first direction, and a thickness intersecting the first direction of the first terminal portion. A plate-like second terminal portion that is positioned to be displaced from the first terminal portion in the direction, is connected to the second connection object among the plurality of connection objects, and extends along the first direction; A first curved portion connected to one terminal portion and a second curved portion connected to the second terminal portion, and a plate-shaped bridge portion capable of elastic deformation Members,
With
A cross section along the width direction of the bridge portion and the thickness direction of the bridge portion between the first curved portion and the second curved portion of the bridge portion is at least another part of the bridge portion. An assembled battery provided with a fusing part that is smaller than the cross-section and is fused by heat including self-generated heat.
The assembled battery according to claim 1, wherein the bridge portion is provided in an elastically deformed state.
The bridge portion includes a first convex portion that includes the first curved portion and is bent into a shape that is convex in the first direction with respect to the first terminal portion, and the second curved portion. Including a portion and interposed between the first convex portion and the second terminal portion, and is bent into a shape that is convex in a direction opposite to the first direction with respect to the second terminal portion. The assembled battery according to claim 1, further comprising: a second convex portion.
The first curved portion is connected to an end portion of the first terminal portion in the first direction,
The second curved portion is connected to an end portion of the second terminal portion opposite to the first direction,
The bridge portion is interposed between the first curved portion and the second curved portion, and has a wall portion that goes in the opposite direction from the first curved portion toward the second curved portion. The assembled battery according to claim 1 or 2.
The first curved portion is connected to an end portion of the first terminal portion in the first direction,
The second curved portion is connected to an end portion of the second terminal portion opposite to the first direction,
The said bridge | bridging part was interposed between said 1st curved part and said 2nd curved part, and had the wall part extended in the direction orthogonal to said 1st direction. Battery pack.
The first curved portion is connected to an end portion of the first terminal portion in the first direction,
The second curved portion is connected to an end portion of the second terminal portion opposite to the first direction,
The bridge portion is interposed between the first curved portion and the second curved portion, and moves toward the first direction from the first curved portion toward the second curved portion. The assembled battery according to claim 1, comprising:
The assembled battery according to claim 3, wherein the first convex portion and the second convex portion have different widths in the thickness direction.
The assembled battery according to any one of claims 1 to 7, wherein at least one of both end portions of the bridge portion in the width direction of the bridge portion is provided with a recess recessed in the width direction.
The bridge portion has both ends in the width direction of the bridge portion, and a pair of surfaces across the both ends,
The assembled battery according to any one of claims 1 to 8, wherein a recess extending in the width direction is provided on at least one of the pair of surfaces.
A plate-like first terminal portion connected to the first connection object and extending along the first direction;
The first terminal portion is located in a thickness direction intersecting with the first direction and shifted from the first terminal portion, and is connected to a second connection target and has a plate shape along the first direction. A second terminal portion;
A first curved portion connected to the first terminal portion and a second curved portion connected to the second terminal portion, and a plate-like bridge portion capable of elastic deformation;
With
A cross section along the width direction of the bridge portion and the thickness direction of the bridge portion between the first curved portion and the second curved portion of the bridge portion is at least another part of the bridge portion. The electrically conductive member provided with the fusing part which is smaller than the said cross section, and melts by heat including the heat which self-heated.