Battery

Abstract

To provide a battery in which a wiring member is fixed in a state where a load is suppressed.SOLUTION: A battery has a plurality of cells (13) arranged adjacent to each other, and a wire member (21) electrically connected to the cells (13) and through which a signal related to information of the cells (13) is conducted. With the battery, the wire member (21) has a base (23) having an insertion portion (23b) arranged in a direction in which the cells (13) are arranged adjacent to each other in a state of being spaced apart relative to the cells (13), interposed between the cells (13), and disposed so as to be slidable relative to the cells (13), and a support portion (23a) that is supported by the insertion portion (23b) and supports the wire member (21).SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to batteries. [Background technology]

[0002] In recent years, research and development into secondary batteries that contribute to energy efficiency has been conducted to ensure that more people have access to affordable, reliable, sustainable and advanced energy. As a technology related to such secondary batteries, Patent Document 1 describes a technology for fixing a signal collection harness that collects signals for monitoring the temperature and voltage of a cell to a battery pack. In Patent Document 1, a support plate is provided below the collection wires of the signal collection harness that are routed above the cell explosion-proof valve, a protective cover that bundles the collection wires is fixed to this support plate, and the support plate is attached to the battery pack, thereby achieving fixed mounting of the signal collection harness to the battery pack. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Utility Model No. 217848253 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in technologies related to secondary batteries, the position of the cell surface may differ for each cell due to the influence of cell mounting tolerances, etc. Therefore, the technology described in Patent Document 1 has issues such as the possibility that the support plate may not be sufficiently fixed onto the battery pack made up of the cells, or that the signal collection harness may bend, causing a load to be applied to part of the signal collection harness. The present invention has been made in view of the above circumstances, and aims to provide a battery in which wiring members are fixed in a state in which the load is suppressed, thereby contributing to energy efficiency. [Means for solving the problem]

[0005] The battery comprises a plurality of cells arranged adjacent to each other, and a wiring member electrically connected to the cells and through which signals related to information about the cells are conducted. The wiring member is arranged in the direction in which the cells are adjacent to each other with a gap between them, and has a base comprising an insertion portion inserted between the cells and arranged so as to be slidable relative to the cells, and a support portion supported by the insertion portion and supporting the wiring member. [Effects of the Invention]

[0006] It is possible to provide a battery in which the wiring members are fixed in a state in which the load is suppressed, which in turn contributes to improving energy efficiency. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of a battery unit according to an embodiment. [Figure 2] FIG. 2 is a plan view of the battery body according to the embodiment. [Figure 3] FIG. 2 is an exploded perspective view of a band according to an embodiment. [Figure 4] FIG. 2 is a perspective view of a base according to an embodiment. [Figure 5] FIG. 10 is a diagram schematically illustrating the relationship between the gaps between the cell comps and the base. [Figure 6] FIG. 2 is an enlarged perspective view of the periphery of the base of the battery body. [Figure 7] 10 is a schematic diagram showing the positional relationship between the strip and the cell comp when the base is in the insertion position. FIG. [Figure 8] 10 is a schematic diagram showing the positional relationship between the strip and the cell comp when the base is in the restricted position. FIG. [Figure 9] 10 is a schematic diagram showing the positional relationship between the strip and the cell comp in the present embodiment. FIG. [Figure 10]FIG. 10 is a schematic diagram showing the positional relationship between a strip and a cell comp in a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0009] [Embodiment Mode] FIG. 1 is a perspective view of a battery unit 1 according to an embodiment. The battery unit (battery) 1 has a housing 2 that has a rectangular parallelepiped appearance. Inside the housing 2, a battery main body 3 is housed.

[0010] The battery body 3 has a rectangular base plate 11. A plurality of cell components 12 are fixed to the base plate 11. The cell comp 12 is a member in which a predetermined number of cells 13 are unitized. The cells 13 are cylindrical. In this embodiment, the longitudinal direction of the cells 13 is referred to as the axial direction. The cells 13 have a positive electrode (positive electrode) and a negative electrode (negative electrode) at one axial end. More specifically, the positive electrode is provided at the axial center of the one axial end of the cell 13. The negative electrode is also provided around the cell 13, spaced radially from the positive electrode. In this embodiment, the cells 13 are arranged so that the axial direction is the up-down direction. The cells 13 are arranged adjacent to each other in a direction perpendicular to the up-down direction. The cells 13 are arranged adjacent to each other in a front-rear direction (first direction) and a left-right direction (second direction) perpendicular to the up-down direction (axial direction). The second direction is a direction intersecting the first direction.

[0011] A plate-shaped bus bar 14 is attached to the top surface (one axial end surface) of each of the adjacently arranged cells 13. The bus bar 14 has a three-layer structure. The bus bar 14 has an insulator in the center of the thickness direction, a positive bus bar 14a (see FIG. 2) above the insulator, and a negative bus bar 14b (see FIG. 2) below the insulator. The positive electrode of each cell 13 is electrically connected to the positive bus bar 14a. The negative electrode of each cell 13 is electrically connected to the negative bus bar 14b. The positive and negative electrodes of the cells 13 are connected to the bus bar 14 by, for example, welding. This forms a cell comp 12 in which a predetermined number of cells 13 are adjacent to each other. The cell comp 12 is a battery in which a predetermined number of cells 13 are connected in parallel.

[0012] FIG. 2 is a plan view of the battery main body 3 according to the embodiment. The cell comparators 12 are arranged on the upper surface of the base plate 11. A plurality of cell comparators 12 are arranged adjacent to each other. In this embodiment, the cell comparators 12 are connected in series. That is, the negative electrode bus bar 14b of one cell comparator 12 is electrically connected to the positive electrode bus bar 14a of the adjacent cell comparator 12. The shapes of the bus bars 14 of the cell comparators 12 differ depending on the arrangement position and connection direction, but the basic structure is the same.

[0013] In the battery main body 3 of this embodiment, the cell components 12 are arranged adjacent to each other in the front-to-rear direction (first direction). The cell components 12 are also arranged adjacent to each other in the left-to-right direction (second direction). In the battery main body 3 of this embodiment, the cell components 12 are arranged in two rows in a U-shape. The cell components 12 are connected in series in two rows. The cell components 12 are adhered to the upper surface of the base plate 11 with an adhesive. This fixes the cell components 12 to the upper surface of the base plate 11.

[0014] In the battery main body 3, a predetermined gap S is formed between adjacent cell components 12. A left-right gap S2 extending in the left-right direction is formed between adjacent cell components 12 in the front-rear direction. A front-rear gap S1 extending in the front-rear direction is formed between adjacent cell components 12 in the left-right direction. The front-rear gap S1 and the left-right gap S2 are connected to each other.

[0015] A strip 20 (see FIG. 1) for exchanging signals regarding the state of the cells 13 is arranged above the cell compressor 12 so as to cover the front-to-rear gap S1. In this embodiment, two strips 20 are arranged, one for each of the two rows of cell compressors 12 connected in series.

[0016] FIG. 3 is an exploded perspective view of the band 20 according to the embodiment. The strip 20 has an FPC (Flexible Printed Circuit) 21 (wiring member). The FPC 21 is strip-shaped. The FPC 21 is electrically connected to the cells 13 and transmits signals related to information about the cells 13. In this embodiment, the FPC 21 transmits signals related to the temperature and voltage of the cells 13, as examples of information. Therefore, the FPC 21 includes a temperature sensor wiring portion that transmits signals from a temperature sensor that detects the temperature of the cells 13, and a voltage sensor wiring portion that transmits signals from a voltage sensor that measures the voltage of the cells 13.

[0017] The FPC 21 has an FPC main body 21a arranged in the front-rear direction, which is the direction in which the cells 13 are adjacent to each other. The FPC main body 21a has an extending portion 21b formed in a cut-and-raised shape at its widthwise (left-right) end. That is, the FPC main body 21a has an opening-shaped cutout 21c cut inward from its widthwise outer end, and the extending portion 21b connected to the inner edge of the cutout 21c. The extending portion 21b has a base end (connecting portion) 21b1 connected to the inner edge of the cutout 21c. The extending portion 21b extends toward the cell 13. In this embodiment, the extending portion 21b extends downward. A terminal portion 21d is formed at the tip of the extending portion 21b. A connector portion 21e is connected to the front end (one longitudinal end) of the FPC main body 21a.

[0018] A heat-resistant sheet (heat-resistant member) 22 is placed on the underside of the FPC 21 (the surface facing the cell comp 12). The heat-resistant sheet 22 is, for example, a mica sheet. The mica sheet is an insulating sheet made of laminated mica integrated with a silicone adhesive. The heat-resistant sheet 22 is strip-shaped. The heat-resistant sheet 22 is formed to have approximately the same size as the FPC main body 21a. The heat-resistant sheet 22 protects the FPC 21 from the heat of the cells 13. The heat-resistant sheet 22 has an opening-shaped wiring outlet 22a cut out from the outer end in the width direction to the inside in the width direction. The wiring outlet 22a is formed to correspond to the position of the base end 21b1 of the extension portion 21b of the FPC 21. The opening shape of the wiring outlet 22a is smaller than the cutout 21c of the FPC 21. This makes it easier to expose only the extending portion 21b of the FPC 21 downward from the heat-resistant sheet 22, making it easier to protect the lower surface of the FPC 21.

[0019] FIG. 4 is a perspective view of the base 23 according to the embodiment. A base 23 is disposed below the heat-resistant sheet 22. The base 23 is made of, for example, resin. The base 23 is disposed at a predetermined interval in the longitudinal direction of the heat-resistant sheet 22, i.e., in the front-to-rear direction. The predetermined interval is based on the width of the left-to-right gap S2 of the battery main body 3.

[0020] The base 23 has a plate-shaped support portion 23a. A flat surface 23a1 is formed above the support portion 23a (one axial side, one insertion direction side). An insertion portion 23b that protrudes downward from the support portion 23a is formed below the support portion 23a (the other axial side, the other insertion direction side). The insertion portion 23b is formed in a shape that allows it to be press-fitted, as an example of insertion, into the gap S of the cell compact 12. Specifically, the insertion portion 23b is formed with a front-rear direction extending portion (first extending portion) 23b1 that extends in the front-rear direction and a left-right direction extending portion (second extending portion) 23b2 that extends in the left-right direction. The front-rear direction extending portion 23b1 is formed slightly larger than the width of the front-rear gap S1. The left-right direction extending portion 23b2 is formed slightly larger than the width of the left-right gap S2. In this embodiment, the length L1 (see FIG. 8) of the base 23 in the up-down direction is longer than the length L2 (see FIG. 8) of the extending portion 21b of the FPC 21. In other words, the length L2 of the extending portion 21b of the FPC 21 is shorter than the length L1 of the base 23 in the up-down direction. Therefore, when viewed in a direction intersecting the insertion direction, for example, when viewed in the left-right direction shown in FIG. 8, the length L2 of the extending portions 21b located on both sides of the base 23 that sandwich the base 23 is shorter than the length L1 of the base 23 in the up-down direction.

[0021] Here, in the band-shaped body 20, the heat-resistant sheet 22 is bonded to the lower surface of the FPC 21 via an adhesive. Thus, the FPC 21 and the heat-resistant sheet 22 are integrated. The base 23 is bonded to the lower surface of the integrated heat-resistant sheet 22 via an adhesive. Specifically, the flat surface 23a1 of the support portion 23a is bonded to the lower surface of the heat-resistant sheet 22. At this time, the front-rear extending portion 23b1 of the base 23 is bonded along the front-rear direction, and the left-right extending portion 23b2 is bonded along the left-right direction. Furthermore, the base 23 is bonded to the heat-resistant sheet 22 with a predetermined gap therebetween.

[0022] This forms the band 20, which is an integrated combination of the FPC 21, heat-resistant sheet 22, and base 23. The band 20 is routed above the cell comps 12 (see FIG. 1) along the front-to-rear gap S1 (see FIG. 2). The base 23 is inserted from above into the gap S between the cell comps 12, thereby routing the band 20 above the cell comps 12. Therefore, the FPC 21 that forms the upper part of the band 20 is arranged above the cell comps 12 with a gap therebetween.

[0023] 5 is a diagram schematically illustrating the relationship between the gap S between the cell comps 12 and the base 23. In FIG. 5, the gap S is indicated by hatching. When the insertion portion 23b of the base 23 is inserted, the front-rear extending portion 23b1 is inserted into the front-rear gap S1. Therefore, the base 23 is less likely to move in a direction intersecting the front-rear gap S1. Furthermore, when the insertion portion 23b of the base 23 is inserted, the left-right extending portion 23b2 is inserted into the left-right gap S2. Therefore, the base 23 is less likely to move in a direction intersecting the left-right gap S2. Therefore, the base 23 is less likely to move in the front-rear and left-right directions. On the other hand, the base 23 can move in a direction perpendicular to the plane formed by the front-rear and left-right directions, i.e., in the up-down direction. Therefore, the insertion portion 23b of the base 23 is arranged in the gap S in a state where it can slide up and down.

[0024] FIG. 6 is an enlarged perspective view of the periphery of the base 23 of the battery main body 3. As shown in FIG. The base 23 is sandwiched between the cells 13 of adjacent cell comps 12, and its position in the vertical direction (insertion direction), i.e., its height, is adjustable. With the height adjusted, the terminal portion 21d of the FPC 21 in the strip 20 is electrically connected to the bus bar 14 of the cell comps 12. The terminal portion 21d is electrically connected to the bus bar 14 by, for example, welding.

[0025] Fig. 7 is a schematic diagram showing the positional relationship between the band 20 and the cell comp 12 when the base 23 is in the insertion position. Fig. 8 is a schematic diagram showing the positional relationship between the band 20 and the cell comp 12 when the base 23 is in the restricted position. As shown in FIGS. 7 and 8, in this embodiment, the length L1 of the base 23 in the up-down direction is longer than the length L2 of the extension portion 21b.

[0026] As shown in Figure 7, when the insertion portion 23b of the base 23 is firmly inserted into the gap S and the base 23 is inserted to the insertion position where the support portion 23a of the base 23 contacts the bus bar 14 of the cell comp 12, the extension portion 21b, which is part of the FPC 21, is held in a bent state, as shown in Figure 7.

[0027] 8, when base 23 is moved in the direction of being pulled out of gap S, extension portion 21b deforms from a bent state to a fully extended state, and extension portion 21b restricts the movement of strip 20. At this time, extension portion 21b is fully extended perpendicularly or at an angle relative to the upper surface of busbar 14. When extension portions 21b located on both sides of base 23 sandwiching base 23 in a left-right view are fully extended, distance L3 between base end 21b1 of extension portion 21b and busbar 14 (the distance between base end 21b1 and busbar 14 in the direction perpendicular to the upper surface of busbar 14) is equal to or less than the length of extension portion 21b. In this embodiment, length L1 of base 23 in the up-down direction is longer than length L2 of extension portion 21b, and therefore length L1 of base 23 in the insertion direction is longer than distance L3. That is, since the length L1 of the base 23 in the vertical direction is longer than the distance L3, even when the base 23 moves to the restricted position where the extension portion 21b is fully extended, the insertion portion 23b remains inserted in the gap S. Therefore, in this embodiment, regardless of the vertical position of the base 23, movement in the front-back or left-right directions is prevented.

[0028] Fig. 9 is a schematic diagram showing the positional relationship between the strip 20 of this embodiment and the cell comp 12. Fig. 10 is a schematic diagram showing the positional relationship between the strip 120 of a comparative example and the cell comp 12. The strip 120 of the comparative example differs from the strip 20 of the present embodiment in that it has a resin member 123 attached to the attachment surface of the cell compressor 12 instead of the base 23 .

[0029] Generally, the position of the surface of the cell comp 12 varies due to factors such as the mounting tolerance of the cells 13. Furthermore, because the cell comp 12 is attached to the base plate 11 via an adhesive, the thickness tolerance of the adhesive 15 also comes into play, and the position of the surface of the cell comp 12, i.e., the height, is prone to variation.

[0030] 10, when attempting to route the FPC 21 flatly, a gap is likely to occur between the resin member 123 and the upper surface of the cell comp 12, and there are cases where the FPC 21 cannot be sufficiently fixed to the cell comp 12. On the other hand, when attempting to fix the resin member 123 to the cell comp 12 with priority given to fixation, the FPC 21 is bent, and a load is sometimes applied to a part of the FPC 21.

[0031] 9, in this embodiment, the gap S between the cell comparators 12 can be used to adjust the vertical position of the base 23, so that the height of each base 23 can be easily aligned regardless of the height of the upper surface of each cell comparator 12, and the FPC 21 can be routed in a nearly flat state. Therefore, in this embodiment, bending of the FPC 21 can be easily suppressed, and loads applied to the FPC 21 can be suppressed.

[0032] As described above, according to this embodiment, in a battery unit 1 including a plurality of cells 13 arranged adjacent to each other and an FPC 21 electrically connected to the cells 13 and through which signals related to information about the cells 13 are conducted, the FPC 21 is arranged in the direction in which the cells 13 are adjacent to each other with a gap between them, and has a base 23 including an insertion portion 23b inserted between the cells 13 and arranged so as to be able to slide relative to the cells 13, and a support portion 23a supported by the insertion portion 23b and supporting the FPC 21. According to this configuration, by adjusting the height (position in the insertion direction) of the base 23, the FPC 21 can be routed in a nearly flat state regardless of the height of the surface of each cell 13. Therefore, bending of the FPC 21 can be suppressed, and loads applied to the FPC 21 can be suppressed. Therefore, it is possible to provide a battery unit 1 in which the FPC 21 is fixed in a state in which loads are suppressed.

[0033] In this embodiment, a heat-resistant sheet 22 is placed on the cell 13 side of the FPC 21. This configuration can protect the FPC 21 from heat generated by the cells 13 .

[0034] In addition, in this embodiment, the multiple cells 13 are adjacent to each other in the front-to-rear and left-to-right directions, and the insertion portion 23b has a front-to-rear extending portion 23b1 that extends in the front-to-rear direction and a left-to-right extending portion 23b2 that extends in the left-to-right direction. According to this configuration, the base 23 can be restricted from moving in the front-rear and left-right directions, so that the position of the FPC 21 supported by the base 23 can be easily fixed at a specified position.

[0035] In addition, in this embodiment, the FPC 21 has an FPC main body 21a arranged along the direction in which the cells 13 are adjacent to each other, and a plurality of extension portions 21b extending from the FPC main body 21a toward the cells 13 and connected to the bus bar 14 connected to the electrodes of the cells 13, and the vertical length L1 of the base 23 is longer than the distance L3 between the base end 21b1, which is the connection portion between the extension portion 21b and the FPC main body 21a of the extension portion 21b when the extension portion 21b sandwiching the base 23 is fully extended, when viewed in the left-right direction (see Figure 8), which is an example of a view in a direction intersecting the insertion direction. According to this configuration, even when the extension portion 21b is fully extended, the base 23 can be prevented from slipping out from between the cells 13, so that the FPC 21 can be maintained in a specified position.

[0036] In this embodiment, the length L2 of the extension portion 21b is shorter than the length L1 of the base 23 in the up-down direction. According to this configuration, the length L2 of the extending portion 21b can be shortened, thereby reducing the amount of material used for the FPC 21. Therefore, since the amount of material used can be reduced, the manufacturing cost of the FPC 21 can be reduced.

[0037] [Other embodiments] The above-described embodiment merely shows one aspect of the present invention, and any modifications and applications are possible without departing from the spirit of the present invention.

[0038] In the above embodiment, the configuration in which the extension portion 21b is connected to the bus bar 14 has been described, but it may also be connected to the cell 13.

[0039] In the above embodiment, the front-rear direction is exemplified as the first direction and the left-right direction is exemplified as the second direction, but the first direction and the second direction are not limited to these. The first direction and the second direction may be any direction that forms a plane perpendicular to the axial direction of the cells 13.

[0040] In the above embodiment, a configuration has been described in which the length L1 of the base 23 in the insertion direction is longer than the distance L3 between the connection portion 21b1 with the main body portion 21a of the extension portion 21b and the busbar 14 or the cell 13 when the extension portions 21b sandwiching the base 23 as viewed in a direction intersecting the insertion direction are fully extended, and the distance L3 when the extension portions 21b adjacent to the base 23 and sandwiching the base 23 are fully extended has been described. However, the extension portions 21b sandwiching the base 23 as viewed in a direction intersecting the insertion direction are not limited to the extension portions 21b located on both sides adjacent to the base 23, but may be a pair of extension portions 21b sandwiching the base 23 and sandwiching the bent extension portion 21b therebetween. In other words, the extension portions 21b that sandwich the base 23 are located on both sides of the base 23, and as long as it is possible to prevent the base 23 from slipping out from between the cells 13, the extension portions 21b do not have to be adjacent to the base 23, but may be extension portions 21b away from the base 23.

[0041] In the above embodiment, the length L1 of the base 23 in the insertion direction is longer than the distance L3 between the busbar 14 or the cell 13 and the connection portion 21b1 of the extension portion 21b with the main body portion 21a of the extension portion 21b when the extension portions 21b sandwiching the base 23 are fully extended as viewed in the left-right direction, which is a view in a direction intersecting the insertion direction. However, the view in a direction intersecting the insertion direction may be, for example, a view in the front-back direction. That is, the length L1 of the base 23 in the insertion direction may be longer than the distance L3 between the busbar 14 or the cell 13 and the connection portion 21b1 of the extension portion 21b with the main body portion 21a of the extension portion 21b when the extension portions 21b sandwiching the base 23 are fully extended as viewed in the front-back direction.

[0042] In the above embodiment, the length L1 of the base 23 and the length L2 of the extension portion 21 are described as being the same regardless of the arrangement position, but the length L1 of the base 23 and the length L2 of the extension portion 21 may be varied depending on the arrangement position. For example, the vertical length L1 of the base 23 may be varied depending on the arrangement position as long as it is longer than the distance L3. In other words, the length L1 of the base 23 and the length L2 of the extension portion 21 may be varied as long as it can prevent the base 23 from slipping out from between the cells 13.

[0043] In the above embodiment, the length L2 of the extension portion 21b is shorter than the length L1 of the base 23 in the up-down direction. However, the length L2 of the extension portion 21b may be longer than the length L1 of the base 23 in the up-down direction. For example, when the length L2 of the extension portion 21b is longer than the length L1 of the base 23 in the up-down direction, the extension portion 21b can extend at a gentle incline, that is, at an incline in a direction along the upper surface of the busbar 14, thereby restricting the movement of the strip 20. In other words, the length and extension direction (inclined state) of each extension portion 21b may be any configuration as long as the length L1 in the insertion direction of the base 23 is longer than the distance L3 between the base end 21b1 of the extension portion 21b when the extension portion 21b is fully extended and the busbar 14 or the cell 13 to which the extension portion 21b is connected.

[0044] [Configuration supported by the above embodiment] The above embodiment supports the following configurations.

[0045] (Configuration 1) A battery comprising a plurality of cells arranged adjacent to each other and a wiring member electrically connected to the cells and through which signals related to information about the cells are conducted, characterized in that the wiring member is arranged in the direction in which the cells are adjacent to each other with a gap between them, and has a base comprising an insertion portion inserted between the cells and arranged so as to be slidable relative to the cells, and a support portion supported by the insertion portion and supporting the wiring member. With this configuration, by adjusting the position of the base in the insertion direction, the wiring members can be routed in a nearly flat state regardless of the position of the surface of each cell in the insertion direction. This prevents bending of the wiring members and reduces load on the wiring members. Therefore, a battery can be provided in which the wiring members are fixed in a state where load is reduced.

[0046] (Configuration 2) The battery according to configuration 1, wherein a heat-resistant member is superimposed on the cell side of the wiring member. This configuration can protect the wiring members from heat generated by the cells.

[0047] (Configuration 3) A battery as described in configuration 1 or 2, characterized in that the plurality of cells are adjacent to each other in a predetermined first direction and a second direction intersecting the first direction, and the insertion portion has a first extension portion extending in the first direction relative to the insertion direction, and a second extension portion extending in the second direction. According to this configuration, the movement of the base in the first direction and the second direction can be restricted, so that the position of the wiring member supported by the base can be easily fixed at a specified position.

[0048] (Configuration 4) A battery described in any one of configurations 1 to 3, characterized in that the wiring member has a main body portion arranged along the direction in which the cells are adjacent to each other, and an extension portion extending from the main body portion toward the cell and connected to a bus bar connected to an electrode of the cell or to the cell, and the length of the base in the insertion direction is longer than the distance between the connection portion of the extension portion with the main body portion and the bus bar or the cell when the extension portion sandwiching the base is fully extended as viewed in a direction intersecting the insertion direction. According to this configuration, even when the extension portion is fully extended, the base can be prevented from slipping out from between the cells, so that the wiring member can be maintained in a specified position.

[0049] (Configuration 5) The battery according to configuration 4, wherein the length of the extension portion is shorter than the length of the base in the insertion direction. According to this configuration, the length of the extending portion can be shortened, which reduces the amount of material used for the wiring member, thereby reducing the manufacturing cost of the wiring member. [Explanation of symbols]

[0050] 1 Battery unit (battery) 13 cells 14 Busbar 21 FPC (wiring material) 21a FPC main body (main body) 21b Extension 21b1 Base end (connection part with main body) 22 Heat-resistant sheet (heat-resistant material) 23 Foundation 23a Support part 23b Insertion part 23b1 Front-back extension part (first extension part) 23b2 Lateral extension part (second extension part) L1 length L2 length

Claims

1. A battery comprising a plurality of adjacently arranged cells (13) and a wiring member (21) electrically connected to the cells (13) and through which signals related to information of the cells (13) are conducted, The wiring member (21) is arranged in a direction in which the cells (13) are adjacent to each other with a gap therebetween, The present invention is characterized in that it has a base (23) including an insertion portion (23b) that is inserted between the cells (13) and arranged in a state where it can slide relative to the cells (13), and a support portion (23a) that is supported by the insertion portion (23b) and supports the wiring member (21), Battery.

2. A heat-resistant member (22) is superimposed on the cell (13) side of the wiring member (21).

10. The battery of claim 1.

3. The plurality of cells (13) are adjacent to each other in a predetermined first direction and a second direction intersecting the first direction, The insertion portion (23b) includes a first extension portion (23b1) extending in the first direction relative to the insertion direction, and a second extension portion (23b2) extending in the second direction.

3. The battery according to claim 1 or 2.

4. The wiring member (21) has a main body portion (21a) arranged along the direction in which the cells (13) are adjacent to each other, and a plurality of extension portions (21b) extending from the main body portion (21a) toward the cells (13) and connected to bus bars (14) connected to electrodes of the cells (13) or to the cells (13), a length (L1) of the base (23) in the insertion direction is longer than a distance (L3) between a connection portion (21b1) of the extension portion (21b) with the main body portion (21a) and the bus bar (14) or the cell (13) when the extension portion (21b) sandwiching the base (23) is fully extended as viewed in a direction intersecting the insertion direction.

3. The battery according to claim 1 or 2.

5. The length (L2) of the extension portion (21b) is shorter than the length (L1) of the base (23) in the insertion direction.

5. The battery of claim 4.

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