Wiring module

Abstract

A wiring module (20) is mounted to a battery stack (11L) configured by stacking a plurality of laminated batteries (11) provided with electrode leads (12), the battery stack (11L) being provided with a bonding portion (13) in which the electrode leads (12) of the laminated batteries (11) overlap each other and are bonded to each other, the wiring module (20) being provided with: a terminal (30); an electric wire (45) connected to the terminal (30); and a protector (50) that holds the terminal (30) and the electric wire (45), the terminal (30) being provided with: a main body part (31); a connection part (32) extending from the main body part (31) and connected to an electrode lead (12) constituting the bonding part (13) so as to face the electrode lead in the first direction; and a bent plate section (33) connected to the main body section (31) via a bent section (35) and extending toward the laminated battery (11) side in the first direction, the protector (50) having: a protector main body (51); a recess (56) that is recessed toward the laminated battery (11) side in the first direction with respect to the protector main body (51) and that accommodates the bent plate section (33); and at least one flexure sheet (62) extending from the protector main body (51) and capable of flexure deformation in a second direction orthogonal to the first direction, the flexure sheet (62) being provided with: a plurality of plate sections (63) extending in the first direction and arranged at intervals in the second direction; and at least one connecting part (64) for connecting the end parts of two adjacent plate parts (63) in the first direction, the plurality of plate parts (63) are provided with at least a base end side plate part (63B) connected with the protector main body (51) and a top end side plate part (63A) arranged in a manner of facing the terminal (30), the top end side plate part (63A) is provided with a locking part (65A), the locking part (65A) is arranged in the concave part (56), and the locking part (65A) is provided with a locking part (65B). The flexure sheet (62) forms a corrugated tube shape by being engaged with the bent plate portion (33) from the side opposite to the laminated battery (11) side in the first direction and alternately connected from the base end side plate portion (63B) to the tip end side plate portion (63A) by the plate portion (63) and the connection portion (64).

Description

Technical Field

[0001] The invention relates to a wiring module. Background Art

[0002] High-voltage battery packs used in electric vehicles, hybrid vehicles, etc. are usually stacked with multiple battery cells, which are electrically connected in series or in parallel through wiring modules. As such a wiring module, the wiring module described in Japanese Patent Publication No. 2020-527848 (hereinafter referred to as Patent Document 1) is known in the past. The battery module described in Patent Document 1 includes: a single-cell assembly, in which a plurality of battery cells are stacked in the left-right direction, and the battery cells have electrode leads at the front and rear ends; a module housing, which is configured to accommodate a single-cell assembly in an internal space formed by four upper, lower, left and right side walls; and an end frame, which is assembled in front and behind the single-cell assembly to connect the single-cell assembly to external equipment. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application No. 2020-527848 Summary of the invention Problems to be solved by the invention

[0004] In the above structure, the cell assembly has a portion where the electrode leads of adjacent battery cells are bent, overlapped and electrically connected so that the electrode leads are close to each other. Therefore, it is not necessary to provide a bus bar to connect the electrode leads. The electrode leads are electrically connected to the module terminals provided on the end frame.

[0005] In the above structure, the electrode lead and the module terminal can be connected by laser welding. Considering the efficiency of laser welding, the thickness of the module terminal is preferably thin. On the other hand, when the module terminal is thin, it is possible that the module terminal will bend when the module terminal is assembled to the end frame. Solutions to Solve Problems

[0006] The wiring module of the present disclosure is mounted on a battery stack, the battery stack being formed by stacking a plurality of laminated batteries having electrode leads and having a joint portion where the electrode leads of the laminated batteries overlap and join with each other, the wiring module comprising: a terminal; an electric wire connected to the terminal; and a protector for holding the terminal and the electric wire, the terminal comprising: a main body; a connecting portion extending from the main body, facing and connected to the electrode lead constituting the joint portion in a first direction; and a bent plate portion connected to the main body via a bent portion and extending toward the laminated battery side in the first direction, the protector comprising: a protector main body; a recessed portion recessed toward the laminated battery side in the first direction relative to the protector main body, accommodating the bent plate portion; and At least one flexible piece extends from the protector body and can bend and deform in a second direction orthogonal to the first direction, the flexible piece comprising: a plurality of plate portions extending along the first direction and arranged at intervals in the second direction; and at least one connecting portion connecting the ends of two adjacent plate portions in the first direction, the plurality of plate portions comprising at least a base side plate portion connected to the protector body and a top side plate portion arranged in a manner opposite to the terminal, the top side plate portion comprising a locking portion, the locking portion being arranged in the recess and locking with the bent plate portion from the side opposite to the laminated battery side in the first direction, the plate portions and the connecting portion being alternately connected from the base side plate portion to the top side plate portion, so that the flexible piece forms a bellows shape. Effects of the Invention

[0007] According to the present disclosure, it is possible to provide a wiring module in which the terminals are not easily deformed when the terminals are assembled to the protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a perspective view showing the front portion of the power storage module according to the first embodiment. Figure 2 This is a front view of the power storage module. Figure 3 Yes Figure 2 The terminal periphery is shown enlarged in the figure. Figure 4 yes Figure 2 AA section view. Figure 5 yes Figure 3 BB cross-sectional view. Figure 6 It is shown Figure 3 FIG. 1 is a diagram of the first position of the terminal in the BB section. Figure 7 It is shown Figure 3 FIG. 2 is a diagram of the second position of the terminal in the BB section. Figure 8 is Figure 3 The terminal is omitted in the BB section. Fig. 9 yes Figure 3 CC cross-sectional view. Fig.10 yes Figure 5 DD cross-sectional view. Fig.11 It is a perspective view showing the periphery of a terminal housing portion in the power storage module. Fig.12 is Fig.11 Terminals are omitted in the figure. Fig.13 It is a perspective view of the front part of a battery stack. Fig.14 It is a perspective view showing the main parts of a laminate type battery. Fig.15 This is a perspective view of a terminal connected to an electric wire. Fig.16 It is shown in Figure 3 A diagram showing the state in which the flexible piece is bent when the bent plate portion is inserted into the recessed portion in the BB section. Fig.17 This is a perspective view showing the periphery of the flexible piece according to the second embodiment. Fig.18 is a cross-sectional view of the power storage module, showing the same Figure 5 The corresponding cross-sectional view. Fig.19 is a cross-sectional view of the power storage module, showing the same Fig. 9 The corresponding cross-sectional view. Fig. 20 It is a perspective view showing the periphery of the flexible piece according to the third embodiment. Fig.21 It is a perspective view showing the slits on the inner wall of the flexible piece storage recess. Fig. 22 is a cross-sectional view of the power storage module, showing the same Figure 5 The corresponding cross-sectional view. Fig.23 is a cross-sectional view of a power storage module according to another embodiment, showing the same Figure 5 The corresponding cross-sectional view. DETAILED DESCRIPTION

[0009] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be described below.

[0010] (1) The wiring module of the present disclosure is mounted on a battery stack, the battery stack being formed by stacking a plurality of laminated batteries having electrode leads and having a joint portion where the electrode leads of the laminated batteries overlap and join with each other, the wiring module comprising: a terminal; an electric wire connected to the terminal; and a protector for holding the terminal and the electric wire, the terminal comprising: a main body; a connecting portion extending from the main body and facing and connected to the electrode lead constituting the joint portion in a first direction; and a bent plate portion connected to the main body via a bent portion and extending toward the laminated battery side in the first direction, the protector comprising: a protector main body; a recessed portion recessed toward the laminated battery side in the first direction relative to the protector main body and accommodating the bent plate portion; and at least one flexible piece extending from the protector body and capable of being bent and deformed in a second direction orthogonal to the first direction, the flexible piece comprising: a plurality of plate portions extending along the first direction and arranged at intervals in the second direction; and at least one connecting portion connecting the ends of two adjacent plate portions in the first direction, the plurality of plate portions comprising at least a base side plate portion connected to the protector body and a top side plate portion arranged in a manner opposite to the terminal, the top side plate portion comprising a locking portion, the locking portion being arranged in the recess and locking with the bent plate portion from the side opposite to the laminated battery side in the first direction, the plate portions and the connecting portion being alternately connected from the base side plate portion to the top side plate portion, so that the flexible piece forms a bellows shape.

[0011] According to such a structure, since the flexure piece has a plurality of plate portions and at least one connecting portion connecting two adjacent plate portions and is formed into a bellows shape, the stress required to bend the flexure piece can be reduced. Therefore, by inserting the bent plate portion into the recess, the terminal can be prevented from bending when the terminal is assembled into the protector.

[0012] (2) Preferably, a plurality of electrode receiving recesses are formed in the protector, the plurality of electrode receiving recesses penetrate the protector body along the first direction and receive the electrode leads, the plurality of electrode receiving recesses are arranged in a third direction orthogonal to both the first direction and the second direction, and the flexure is arranged between two adjacent electrode receiving recesses.

[0013] According to such a structure, since the plurality of electrode storage recesses are arranged in the third direction, the wiring module is mounted on a battery stack in which a plurality of laminated batteries are stacked in the third direction. Since a space extending in the first direction and the second direction is formed between the electrode leads adjacent to each other in the third direction, the bending amount of the bending piece can be increased by arranging the bending piece in the space. In addition, the wiring module can be miniaturized.

[0014] (3) Preferably, the end portion of the front end side plate portion on the opposite side to the laminated battery side in the first direction is connected to the connecting portion.

[0015] According to such a configuration, when the bent plate portion is inserted into the recessed portion, it is possible to suppress the bent plate portion from being inserted erroneously between the distal end side plate portion and the plate portion adjacent to the distal end side plate portion.

[0016] (4) Preferably, the top side plate portion has a locking protrusion, which protrudes from the top side plate portion to the side opposite to the base side plate portion in the second direction, and the locking protrusion has the locking portion arranged on the laminated battery side in the first direction and an inclined portion arranged on the side opposite to the laminated battery side in the first direction than the locking portion, and the inclined portion is located at a position away from the base side plate portion in the second direction as it moves toward the laminated battery side in the first direction.

[0017] According to such a configuration, the bent plate portion can be smoothly inserted into the recessed portion and the bent plate portion and the locking portion can be smoothly locked by the inclined portion.

[0018] (5) It is preferable that the distal end side plate portion is located at a position which is farther away from the proximal end side plate portion in the second direction as it goes toward the laminated battery side in the first direction.

[0019] According to such a configuration, the bent plate portion can be smoothly inserted into the recessed portion via the distal end side plate portion.

[0020] (6) Preferably, the protector includes a guide portion on the side of the recess that is opposite to the laminated battery side in the first direction, the guide portion is arranged continuously with the inner wall of the recess, and the guide portion is inclined toward the inner side of the recess as it moves toward the laminated battery side in the first direction.

[0021] According to such a configuration, the insertion of the bent plate portion into the recessed portion can be guided by the guide portion.

[0022] (7) Preferably, the protector has a flexible piece housing recessed portion that is recessed from the protector body toward the laminated battery in the first direction and houses a portion of the flexible piece.

[0023] According to such a configuration, by accommodating a portion of the flexible piece in the flexible piece accommodating recess, a portion of the flexible piece can be protected.

[0024] (8) Preferably, the inner wall constituting the flexure piece storage recess has a pair of slits, the pair of slits extending along the first direction and arranged in a third direction orthogonal to both the first direction and the second direction. The inner wall disposed between the pair of slits is the base end side plate portion.

[0025] According to such a configuration, the base end side plate portion can be formed by utilizing the inner wall of the flexible piece accommodating recess, so that the space for forming the flexible piece can be reduced.

[0026] (9) Preferably, the terminal is formed with at least one opening portion penetrating the bent plate portion, and an edge portion of the opening portion includes a locking receiving portion that is locked with the locking portion.

[0027] According to such a structure, by forming the opening in the bent plate portion, the locking receiving portion that is locked with the locking portion can be easily provided. In addition, the space required for the locking of the bent plate portion and the locking portion can be reduced.

[0028] [Details of the embodiments of the present disclosure] Hereinafter, embodiments of the present invention will be described. The present invention is not limited to these examples but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0029] <Implementation Method 1> Reference Figures 1 to 16 Embodiment 1 of the present disclosure is described. The power storage module 10 having the wiring module 20 of the present embodiment is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is used as a driving source of the vehicle. In the following description, with respect to a plurality of identical components, sometimes only a part of the components are marked with reference numerals, and the reference numerals of other components are omitted. In the following description, the direction indicated by the arrow line X is described as the front, the direction indicated by the arrow line Y is described as the left, and the direction indicated by the arrow line Z is described as the top. In the present embodiment, the front-to-back direction is an example of the first direction, the up-down direction is an example of the second direction, and the left-right direction is an example of the third direction.

[0030] [Battery stack] The power storage module 10 includes Fig.13 The battery stack 11L shown in FIG. Figure 1 The wiring module 20 is mounted on the battery stack 11L. Figure 1 As shown, the power storage module 10 of this embodiment further includes a case 15 covering the battery stack 11L from four directions, top, bottom, left and right. The case 15 is composed of a bottom 15A arranged on the lower surface side of the battery stack 11L, a top 15B arranged on the upper surface side of the battery stack 11L, and a pair of side portions 15C connecting the bottom 15A and the top 15B on the left and right sides.

[0031] [Laminated batteries, electrode leads] like Fig.13 As shown in FIG. 1 , the battery stack 11L is formed by stacking a plurality of (18 in this embodiment) laminated batteries 11 in the left-right direction. Fig.13 In FIG. 1 , only the front side portion of the battery stack 11L is shown. Fig.14 As shown, the laminated battery 11 is long in the front-to-back direction and flat in the left-to-right direction. An electric storage element (not shown) is stored inside the laminated battery 11. A pair of electrode leads 12 are arranged on both sides of the laminated battery 11 in the front-to-back direction, and protrude in opposite directions. The pair of electrode leads 12 are plate-shaped and have opposite polarities.

[0032] [Joint] like Figure 4 and Fig.13 As shown, a joint 13 is provided in the battery stack 11L, and the four electrode leads 12 of the laminated battery 11 arranged continuously in the left-right direction are electrically connected to the joint 13. That is, the four electrode leads 12 are bent approximately vertically to the left or right and overlap, and the joint 13 is formed by joining by laser welding. The electrode leads 12 constituting the joint 13 are connecting electrode leads 12A. Among the four connecting electrode leads 12A, the two connecting electrode leads 12A arranged on the right and the two connecting electrode leads 12A arranged on the left have opposite polarities. For example, the two connecting electrode leads 12A on the right are positive electrodes, and the two connecting electrode leads 12A on the left are negative electrodes. Therefore, in the battery stack 11L, the joint 13 connects the two laminated batteries 11 connected in parallel in series. As Fig.13 As shown, the battery stack 11L includes four joints 13 at the front. Although not shown, the battery stack 11L also includes four joints 13 at the rear.

[0033] The process of forming the joint 13 includes bending processing, laser welding, etc. of the electrode lead 12, so the tolerance of the joint 13 (and the connecting electrode lead 12A) in the front-to-back direction is likely to become large. For example, in this embodiment, the tolerance of the joint 13 (and the connecting electrode lead 12A) in the front-to-back direction is greater than the thickness of the electrode lead 12.

[0034] like Figure 4 and Fig.13As shown, the battery stack 11L has an output portion 14 at the left end portion of the front portion. In addition, although not shown, the battery stack 11L also has an output portion 14 at the right end portion of the rear portion. The output portion 14 is formed by joining two electrode leads 12 that do not constitute the joining portion 13 among the electrode leads 12. The electrode lead 12 that constitutes the output portion 14 is an output electrode lead 12B. The two output electrode leads 12B that constitute one output portion 14 have the same polarity as each other. The output portion 14 constitutes the positive electrode or negative electrode of the entire battery stack 11L. That is, for example, when the output portion 14 at the front is the total positive electrode of the battery stack 11L, the output portion 14 at the rear is the total negative electrode of the battery stack 11L.

[0035] [Wiring module] like Figure 1 As shown, the wiring module 20 of the present embodiment includes: a terminal 30 connected to the connection electrode lead 12A; a bus bar 40 connected to the output electrode lead 12B; an electric wire 45 connected to the terminal 30; and a protector 50 that holds the terminal 30, the bus bar 40, and the electric wire 45. The structure of the wiring module 20 arranged on the front side of the power storage module 10 is described in detail below. Although not shown in the figure, the wiring module 20 arranged on the rear side of the power storage module 10 is configured in the same manner as the wiring module 20 arranged on the front side of the power storage module 10.

[0036] The bus bar 40 is in a plate shape and is formed by processing a conductive metal plate. Figure 2 As shown, the bus bar 40 includes a first portion 40A extending in the vertical direction and a second portion 40B connected to the upper end of the first portion 40A. The first portion 40A is flat in the front-to-back direction. The second portion 40B extends rightward from the upper end of the first portion 40A and is flat in the vertical direction. The bus bar 40 is held by the bus bar holding portion 53 of the protector 50 and is connected to the output electrode lead 12B at the center of the first portion 40A in the vertical direction. A bus bar side connection portion 41 is provided at the right end of the second portion 40B.

[0037] like Figure 1 As shown, the bus bar side connection part 41 has a through hole 41A for inserting a bolt. An external connection terminal (not shown) is overlapped on the bus bar side connection part 41 and is bolted to the bus bar side connection part 41. Thus, the bus bar side connection part 41 is electrically connected to the external connection terminal. The external connection terminal is used to connect an external device (not shown) and the power storage module 10.

[0038] [electric wire] like Figure 6 and Fig.15 As shown in FIG. 1 , the electric wire 45 has a core wire 46 and an insulating coating 47 covering the core wire 46. One end of the electric wire 45 is connected to the terminal 30. Figure 1 As shown, the other ends of the electric wires 45 are gathered into a bundle and connected to the connector 48. The electric wires 45 are laid in the laying recess 50A of the protector 50 and laid at a predetermined position.

[0039] like Figure 2 As shown, the connector 48 includes an insulating synthetic resin housing 48A and a male terminal 48B housed in the housing 48A. The connector 48 is mated with a counterpart connector (not shown) having a female terminal. The counterpart connector is connected to an external ECU (Electronic Control Unit) or the like via an unillustrated wire. The ECU is equipped with a microcomputer, components, etc., and is a known structure having functions such as detecting the voltage, current, temperature, etc. of each laminated battery 11 or controlling the charge and discharge of each laminated battery 11.

[0040] [Terminal] like Fig.15 As shown in FIG. 1 , the terminal 30 is formed by processing a conductive metal plate. The terminal 30 includes a main body 31, a connecting portion 32 extending rightward from the main body 31, a bent plate portion 33 extending rearward from the lower portion of the main body 31, and a wire connecting portion 34 extending upward from the main body 31. Figure 3 As shown in FIG. 1 , the main body 31 is arranged on the right side of the terminal 30 and has a rectangular shape in a front view. The main body 31 is accommodated in the terminal accommodation portion 54 such that the plate thickness direction is the front-back direction.

[0041] [Connection] like Fig.15 As shown in FIG. 1 , the connecting portion 32 is in a rectangular shape that is long in the left-right direction and is formed coplanar with the main body 31. The connecting portion 32 protrudes upward and downward from the main body 31 in the vertical direction. Figure 4 As shown, the connection portion 32 is connected to the joint portion 13 or a part of the connection electrode lead 12A constituting the joint portion 13 by surface contact. That is, the terminal 30 is not a member for connecting between adjacent connection electrode leads 12A, but a member for connecting between the pre-connected connection electrode lead 12A (joint portion 13) and the electric wire 45. Therefore, the dimension of the connection portion 32 in the up-down direction may be smaller than the dimension of the connection electrode lead 12A in the up-down direction.

[0042] [Bending plate] like Fig.15As shown in FIG. 1 , the bent plate portion 33 is bent substantially perpendicularly relative to the main body portion 31 and is formed by extending rearward. The bent plate portion 33 is arranged in such a manner that the plate thickness direction is the up-down direction. The lower end portion of the main body portion 31 and the front end portion of the bent plate portion 33 are connected via a bent portion 35. The plate thickness direction of the bent portion 35 changes from the front-to-back direction to the up-down direction as it moves from the main body portion 31 toward the bent plate portion 33.

[0043] [Opening, locking receiving part] The bent plate portion 33 is formed with an opening 36 extending vertically. The opening 36 is disposed at the center of the bent plate portion 33 in the left-right direction. The rear edge of the opening 36 is a locking receiving portion 36A. Figure 7 As shown in FIG. 1 , the locking receiving portion 36A can be locked with the locking portion 65A of the flexure piece 62 described later. Fig.15 As shown, the opening portion 36 has an expanded opening portion 36B extending to the side of the main body portion 31. By forming the expanded opening portion 36B, when the terminal 30 moves in the front-to-back direction relative to the protector 50, the lower end of the main body portion 31 does not interfere with the flexure piece 62 (refer to Figure 6 ).

[0044] like Figure 6 and Fig.15 As shown, the wire connection portion 34 includes a base portion 34A coplanar with the main body portion 31 and tightening pieces 34B extending from both ends of the base portion 34A in the left-right direction. The tightening piece 34B includes a first tightening piece 34C and a second tightening piece 34D arranged at a distance from the first tightening piece 34C in the front-to-back direction. The first tightening piece 34C is arranged on the main body portion 31 side of the wire connection portion 34 and is crimped to the core wire 46 of the wire 45. The second tightening piece 34D is arranged at the upper end portion of the wire connection portion 34 and is crimped to the insulating covering portion 47 of the wire 45. In addition, Figures 5 to 7 , Fig.15 as well as Fig.16 In addition, the wire connection portion 34 is shown in a simplified manner.

[0045] like Figure 6 As shown, the clamping piece 34B clamps the wire 45 behind the base 34A. The wire connector 34 arranged behind the main body 31 is arranged in the wire connector storage portion 57 described later. With such a structure, the front-rear dimension of the wiring module 20 can be reduced.

[0046] [Protector, electrode storage recess] like Figure 1 As shown in FIG. 1 , the protector 50 is made of insulating synthetic resin and has a plate shape. The protector 50 includes a protector body 51 positioned in the case 15 (and the battery stack 11L). Figure 2As shown in the figure, in the central part of the protector body 51 in the vertical direction, electrode receiving recesses 52 are arranged in parallel in the left-right direction. The electrode receiving recesses 52 are formed through the front-back direction and are in a rectangular shape that is long in the vertical direction. The electrode receiving recesses 52 are composed of a connection electrode receiving recess 52A for receiving the joint portion 13 and the connection electrode lead 12A and an output electrode receiving recess 52B for receiving the output electrode lead 12B and the output portion 14.

[0047] like Figure 2 As shown, bus bar holding portions 53 for holding the bus bar 40 are provided on the upper and lower sides of the output electrode receiving recess 52B. A bolt fastening portion 53A for bolt-fastening the bus bar 40 is provided on the right side of the upper bus bar holding portion 53. A terminal receiving portion 54 for receiving a part of the terminal 30 is provided on the oblique lower left side of the connection electrode receiving recess 52A.

[0048] like Fig.12 As shown, the terminal storage portion 54 is formed in a manner recessed from the protector body 51 toward the rear. The terminal storage portion 54 includes a main body storage portion 55, a recess 56, and a wire connection portion storage portion 57. The main body storage portion 55 is arranged at the lower part of the terminal storage portion 54. The main body storage portion 55 has a bottom wall portion 55A, a left wall portion 55B extending forward from the left end portion of the bottom wall portion 55A, and a connecting hole 55C opened on the right. The connecting hole 55C is connected to the connecting electrode storage recess 52A. Fig.11 As shown, the main body receiving portion 55 receives the main body 31 of the terminal 30. Figure 6 As shown in FIG. 5A , the front surface of the bottom wall portion 55A is a contact portion 58 that contacts the terminal 30 from behind. Fig.11 As shown, a portion of the main body 31 on the connection portion 32 side is arranged in the communication hole 55C, and the connection portion 32 is arranged inside the connection electrode accommodating recess 52A.

[0049] [concave] like Figure 8 and Fig.12 As shown in FIG. 1 , a recess 56 is formed below the main body storage portion 55. The recess 56 is recessed further toward the rear than the main body storage portion 55. The recess 56 is formed so as to penetrate the protector 50 in the front-to-back direction. Fig.10As shown, the inner wall 59 constituting the recess 56 includes a first inner wall 59A and a second inner wall 59B which are opposed to each other in the up-down direction, and two side walls 59C which are opposed to each other in the left-right direction. The first inner wall 59A is arranged above the second inner wall 59B (on the side of the main body storage portion 55). The dimension between the first inner wall 59A and the second inner wall 59B is set to be the same as or slightly larger than the plate thickness (the dimension in the up-down direction) of the bent plate portion 33. The dimension between the two side walls 59C is set to be the same as or slightly larger than the dimension in the left-right direction of the bent plate portion 33. The bent plate portion 33 is accommodated inside the recess 56, and the bent plate portion 33 and the inner wall 59 of the recess 56 can slide in contact. The bent plate portion 33 and the inner wall 59 of the recess 56 slide in contact, thereby Figures 5 to 7 and Fig. 9 As shown, the terminal 30 is movable in the front-rear direction relative to the protector body 51 .

[0050] [Guide] like Figure 5 As shown in FIG. 1 , a guide portion 60 is formed at the front side of the lower end portion of the bottom wall portion 55A. The guide portion 60 is arranged to be connected to the front side of the first inner wall 59A of the recessed portion 56. The guide portion 60 is inclined so as to be located at the lower side as it goes toward the rear. When the bent plate portion 33 is inserted into the recessed portion 56, the guide portion 60 guides the rear end portion of the bent plate portion 33 by guiding it into the recessed portion 56.

[0051] like Fig.12 As shown in FIG. 5 , the wire connection portion storage portion 57 is arranged to be connected to the upper portion of the main body storage portion 55. Figure 6 As shown in FIG. 1 , the wire connector storage portion 57 is formed in a manner that is more recessed toward the rear than the bottom wall portion 55A. Specifically, the front surface of the wire connector storage portion 57 is set to a position where the wire connector 34 does not contact when the main body 31 of the terminal 30 disposed in the terminal storage portion 54 abuts against the front surface (abutment portion 58) of the bottom wall portion 55A. The upper portion of the wire connector storage portion 57 is connected to the wiring recess 50A for wiring the wires 45.

[0052] [Flexible piece storage recess, flexible piece] like Fig.12 As shown, below the recess 56, a flexure piece receiving recess 61 is formed by being recessed from the protector body 51 to the rear. The second inner wall 59B between the recess 56 and the flexure piece receiving recess 61 is recessed from the upper end of the second inner wall 59B to the rear to form an entry port 61A. The recess 56 and the flexure piece receiving recess 61 are connected through the entry port 61A. Figure 8 As shown in FIG. 6 , the flexure piece 62 extends upward from the inner wall of the lower side of the flexure piece storage recess 61. Fig.12As shown, a part of the flexible piece 62 is disposed inside the inlet 61A, so that the tip of the flexible piece 62 enters the recess 56 .

[0053] [Plural plate parts, connecting part, top side plate part, base side plate part] like Figure 8 As shown, the flexure piece 62 has a plurality of (two in this embodiment) plate portions 63 that are long in the front-to-back direction and flat in the up-down direction, and a connecting portion 64 that connects two adjacent plate portions 63. In this embodiment, the plurality of plate portions 63 are composed of a top side plate portion 63A disposed on the top side (upper side) of the flexure piece 62 and a base side plate portion 63B disposed on the base side (lower side) of the flexure piece 62. The top side plate portion 63A and the base side plate portion 63B are disposed in an overlapping manner with intervals in the up-down direction. The front end portion of the top side plate portion 63A and the front end portion of the base side plate portion 63B are smoothly connected in a step-free state by an arched connecting portion 64. The rear end portion of the base side plate portion 63B is connected to the inner wall of the lower side of the flexure piece storage recess 61 via a base end connecting portion 66. The flexure piece 62 can be flexed and deformed in the up-down direction.

[0054] In the flexure piece 62 of the present embodiment, a plurality of plate portions 63 and connecting portions 64 are connected in the order of a base end side plate portion 63B, a connecting portion 64, and a top end side plate portion 63A from the base end side toward the top end side of the flexure piece 62. That is, the plate portions 63 and the connecting portions 64 are alternately arranged in the up-down direction. Thus, the flexure piece 62 is formed into a bellows shape. Figure 2 As shown, in the present embodiment, by arranging the flexible piece 62 between the electrode housing recesses 52 where there is relatively ample space, it is easy to ensure the amount of deflection of the flexible piece 62 without increasing the size of the wiring module 20 .

[0055] [Locking protrusion, locking portion, inclined portion] like Figure 8 As shown, the top side plate portion 63A has a locking protrusion 65 that protrudes upward from the upper surface of the top side plate portion 63A. The locking protrusion 65 is arranged at the rear end of the top side plate portion 63A. The rear end surface of the locking protrusion 65 is the locking portion 65A. An inclined portion 65B is arranged at the front side portion of the locking protrusion 65. The inclined portion 65B is inclined in a manner that it is located on the upper side as it moves toward the rear. The locking portion 65A and the inclined portion 65B are arranged in a manner that is connected in the front-to-back direction. The locking protrusion 65 is arranged in the space on the front side of the recess 56.

[0056] [Assembly of terminal to protector] The structures of the terminal 30 and the protector 50 are as described above. Hereinafter, the assembly of the terminal 30 to the protector 50 will be described. In order to assemble the terminal 30 to the protector 50, specifically, the bent plate portion 33 is inserted from the front into the recess 56. In this embodiment, since the connecting portion 64 is connected to the front end of the top side plate portion 63A, the bent plate portion 33 will not be inserted between the top side plate portion 63A and the base side plate portion 63B by mistake. At the front end edge of the recess 56, the bent plate portion 33 is guided to the inside of the recess 56 by sliding contact with the guide portion 60 or the inclined portion 65B of the locking protrusion 65.

[0057] When the rear end of the bent plate portion 33 is pressed against the inclined portion 65B of the locking protrusion 65, the bent plate portion 33 is moved backward toward the inside of the recess 56. Fig.16 As shown in FIG. 1 , the flexure piece 62 is flexed downward. The connecting portion 64, the locking protrusion 65, and the base end connecting portion 66 are deformed, and each plate portion 63 is displaced in a manner inclined from the posture of the natural state, so that the flexure piece 62 is flexed as a whole. Specifically, the base end side plate portion 63B is displaced in a manner that the front end portion is arranged below the rear end portion, and the top end side plate portion 63A is displaced in a manner that the rear end portion is arranged below the front end portion.

[0058] In this way, the flexure piece 62 of the present embodiment has a plurality of deformable parts (connecting part 64, retaining protrusion 65 and base end connecting part 66), so the stress required for the flexure piece 62 to bend is reduced. This can be inferred from the fact that the composite spring constant of the series spring in which a plurality of springs are connected in series is smaller than the individual spring constants. In addition, since the plate portion 63 is displaced in an inclined manner between the deformable parts, the amount of deflection of the flexure piece 62 accompanying the displacement of the plate portion 63 can be increased by providing a plurality of plate portions 63. In summary, in the flexure piece 62 of the present embodiment, the stress required for the flexure piece 62 to bend is reduced. In other words, the flexure piece 62 can be deflected to a greater extent by a smaller stress. Therefore, when the terminal 30 is assembled to the protector 50, the stress applied to the terminal 30 can be reduced, and the deformation of the terminal 30 can be suppressed.

[0059] also, Fig.16 The deformation of the flexure piece 62 shown in the figure is only an example. Fig.16 Different structures are also included in the scope of the present disclosure. For example, a structure in which the plate portion 63 is not displaced in an inclined manner but is elastically deformed is also within the scope of the present disclosure.

[0060] When the bent plate portion 33 is further moved backward, the flexure piece 62 returns to its natural state from its elastically deformed state just as the rear end surface (locking portion 65A) of the locking protrusion 65 is disposed in the opening portion 36 of the bent plate portion 33. The locking portion 65A and the locking receiving portion 36A are opposed to each other in the front-to-back direction and are in a state where they can be locked (see FIG. Figure 7Thus, by arranging the inclined portion 65B and the locking portion 65A in the front-rear direction, the bent plate portion 33 can be smoothly locked with the locking portion 65A while guiding the insertion of the bent plate portion 33 into the recess 56.

[0061] In addition, in this embodiment, the bent plate portion 33 of the terminal 30 is arranged in the recess 56 of the terminal receiving portion 54, so that the terminal 30 can move in the front-rear direction relative to the protector 50. The terminal 30 can be in the first position (refer to Figure 6 ) and the second position ( Figure 7 ) along the front-to-back direction. Here, the first position is the rearmost position that the terminal 30 can move, and the second position is the frontmost position that the terminal 30 can move. Figure 6 As shown in FIG. 5 , when the terminal 30 is arranged at the first position, the rear surface of the main body 31 abuts against the abutment portion 58. Thus, the rearward movement of the terminal 30 can be restricted. Figure 7 As shown in FIG. 1 , when the terminal 30 is arranged at the second position, the locking receiving portion 36A of the terminal 30 is locked with the locking portion 65A of the flexible piece 62. Thus, the terminal 30 is restricted from moving forward.

[0062] The length in the front-to-back direction between the first position and the second position is set to be the same as or greater than twice the tolerance in the front-to-back direction of the connecting electrode lead 12A. In addition, the middle position between the first position and the second position is the average position in the front-to-back direction of the connecting electrode lead 12A. By setting the first position and the second position in this way, after the protector body 51 of the wiring module 20 is fixed to the battery stack 11L, the terminal 30 can follow the connecting electrode lead 12A. In detail, when the terminal 30 and the connecting electrode lead 12A are laser welded, the connecting portion 32 of the terminal 30 is pressed to the connecting electrode lead 12A by a jig or the like. At this time, the terminal 30 moves in the front-to-back direction in coordination with the connecting electrode lead 12A. Therefore, the state in which the connecting portion 32 and the connecting electrode lead 12A are in close contact can be guaranteed, and the laser welding of the connecting portion 32 and the connecting electrode lead 12A can be performed well.

[0063] [Effects of Embodiment 1] According to the first embodiment, the following actions and effects are achieved. The wiring module 20 of the first embodiment is mounted on a battery stack 11L, which is formed by stacking a plurality of laminated batteries 11 having electrode leads 12, and has a joint 13 where the electrode leads 12 of the laminated batteries 11 overlap and join with each other. The wiring module 20 includes: a terminal 30; an electric wire 45 connected to the terminal 30; and a protector 50 for holding the terminal 30 and the electric wire 45. The terminal 30 includes: a main body 31; a connecting portion 32 extending from the main body 31, facing and connected to the electrode lead 12 constituting the joint 13 in the first direction (front-rear direction); and a bent plate portion 33 connected to the main body 31 via a bent portion 35, extending toward the laminated battery 11 side (rear side) in the first direction. The protector 50 includes: a protector main body 51; a recess 56, which is recessed toward the laminated battery 11 side in the first direction relative to the protector main body 51, and accommodates A bending plate portion 33; and at least one flexible piece 62 extending from the protector body 51 and capable of being bent and deformed in a second direction (up and down direction) orthogonal to the first direction, the flexible piece 62 comprising: a plurality of plate portions 63 extending along the first direction and arranged at intervals in the second direction; and at least one connecting portion 64 connecting the ends of two adjacent plate portions 63 in the first direction, the plurality of plate portions 63 comprising at least a base side plate portion 63B connected to the protector body 51 and a top side plate portion 63A arranged in a manner opposite to the terminal 30, the top side plate portion 63A comprising a locking portion 65A, the locking portion 65A being arranged in the recess 56 and being locked to the bending plate portion 33 from the side (front side) opposite to the laminated battery 11 side in the first direction, and being alternately connected from the base side plate portion 63B to the top side plate portion 63A through the plate portions 63 and the connecting portion 64, so that the flexible piece 62 forms a bellows shape.

[0064] According to such a structure, since the flexure piece 62 includes a plurality of plate portions 63 and at least one connecting portion 64 connecting two adjacent plate portions 63 and is formed into a bellows shape, it is possible to reduce the stress required to bend the flexure piece 62. Therefore, by inserting the bent plate portion 33 into the recess 56, the terminal 30 can be prevented from bending when the terminal 30 is assembled to the protector 50.

[0065] In embodiment 1, a plurality of electrode receiving recesses 52 are formed in the protector 50, the plurality of electrode receiving recesses 52 penetrate the protector body 51 along the first direction and receive the electrode leads 12, the plurality of electrode receiving recesses 52 are arranged in a third direction (left-right direction) orthogonal to both the first direction and the second direction, and the flexure 62 is arranged between two adjacent electrode receiving recesses 52.

[0066] According to such a structure, since the plurality of electrode storage recesses 52 are arranged in the third direction, the wiring module 20 is mounted on the battery stack 11L in which the plurality of laminated batteries 11 are stacked in the third direction. Since a space extending in the first direction and the second direction is formed between the electrode leads 12 adjacent in the third direction, the bending amount of the bending piece 62 can be increased by arranging the bending piece 62 in the space. In addition, the wiring module 20 can be miniaturized.

[0067] In the first embodiment, the end portion of the front end side plate portion 63A on the side opposite to the laminated battery 11 side in the first direction is connected to the connection portion 64 .

[0068] According to such a configuration, when the bent plate portion 33 is inserted into the recessed portion 56 , it is possible to suppress the bent plate portion 33 from being mistakenly inserted between the distal end side plate portion 63A and the plate portion 63 adjacent to the distal end side plate portion 63A.

[0069] In embodiment 1, the top side plate portion 63A includes a locking protrusion 65 that protrudes from the top side plate portion 63A to the side (upper side) opposite to the base side plate portion 63B in the second direction, and the locking protrusion 65 includes a locking portion 65A arranged on the laminated battery 11 side in the first direction and an inclined portion 65B arranged on the side opposite to the laminated battery 11 side in the first direction relative to the locking portion 65A, and the inclined portion 65B is located at a position away from the base side plate portion 63B in the second direction as it moves toward the laminated battery 11 side in the first direction.

[0070] According to such a configuration, the bent plate portion 33 can be smoothly inserted into the recessed portion 56 and the bent plate portion 33 and the locking portion 65A can be smoothly locked by the inclined portion 65B.

[0071] In embodiment 1, the protector 50 includes a guide portion 60 on the side opposite to the laminated battery 11 side in the first direction relative to the recess 56, and the guide portion 60 is continuously arranged with the inner wall 59 (first inner wall 59A) of the recess 56, and the guide portion 60 is inclined toward the inner side of the recess 56 as it moves toward the laminated battery 11 side in the first direction.

[0072] According to such a configuration, the insertion of the bent plate portion 33 into the recessed portion 56 can be guided by the guide portion 60 .

[0073] In the first embodiment, the protector 50 has the flexible piece housing recess 61 which is recessed from the protector body 51 toward the laminated battery 11 side in the first direction and houses a part of the flexible piece 62 .

[0074] According to such a configuration, by accommodating a portion of the flexible piece 62 in the flexible piece accommodating recess 61 , a portion of the flexible piece 62 can be protected.

[0075] In the first embodiment, the terminal 30 is formed with at least one opening 36 penetrating the bent plate portion 33 , and the edge of the opening 36 includes a locking receiving portion 36A that is locked with the locking portion 65A.

[0076] According to such a configuration, the locking receiving portion 36A that is locked with the locking portion 65A can be easily provided by forming the opening portion 36 in the bent plate portion 33. In addition, the space required for the locking of the bent plate portion 33 and the locking portion 65A can be reduced.

[0077] <Implementation Method 2> Reference Figures 17 to 19 Embodiment 2 of the present disclosure is described. The same reference numerals as those in Embodiment 1 are used to mark the same structures as those in Embodiment 1, and the description thereof may be omitted. In addition, the description thereof is omitted to describe the same effects as those in Embodiment 1. Fig.17 As shown, the protector 150 of the second embodiment includes a flexible piece 162, and the flexible piece 162 includes a plurality of plate portions 163. The plurality of plate portions 163 are composed of a distal end side plate portion 163A and a proximal end side plate portion 163B.

[0078] like Fig.18 As shown, the top side plate portion 163A of the flexure piece 162 does not have the locking protrusion 65 of the first embodiment. The top side plate portion 163A is inclined so as to be located upward as it moves toward the rear. In the storage module 110 (wiring module 120) of the second embodiment, the rear end surface of the top side plate portion 163A is a locking portion 165A that can be locked with the locking receiving portion 36A of the terminal 30. In this way, by inclining the top side plate portion 163A, the bent plate portion 33 is guided into the recess 56 in the same manner as the inclined portion 65B of the locking protrusion 65 of the first embodiment.

[0079] In addition, if Fig.19 As shown, in Embodiment 2, a guide portion 160 is formed continuously upward from the second inner wall 59B of the recess 56. The guide portion 160 is inclined so as to be located upward as it moves toward the rear. By making the bent plate portion 33 slide on the guide portion 160, the bent plate portion 33 can be guided into the recess 56.

[0080] [Effects of Embodiment 2] According to the second embodiment, the following functions and effects are achieved. In the second embodiment, the leading end side plate portion 163A is located at a position that becomes more distant from the proximal end side plate portion 63B in the second direction as it goes toward the laminated battery 11 side in the first direction.

[0081] According to such a configuration, the bent plate portion 33 can be smoothly inserted into the recessed portion 56 by the distal end side plate portion 163A.

[0082] <Implementation Method 3> Reference Figure 20 to Figure 22 Embodiment 3 of the present disclosure is described. The same structures as those in Embodiment 1 are marked with the same reference numerals as those in Embodiment 1, and the description thereof is sometimes omitted. In addition, the description of the same effects as those in Embodiment 1 is omitted. Fig. 20 As shown, the protector 250 of the third embodiment includes a flexible piece 262. The flexible piece storage recess 261 of the protector 250 has a pair of slits 261B on the lower inner wall facing the upper inner wall where the inlet port 61A is provided.

[0083] like Fig.21 As shown, a pair of slits 261B are formed to be elongated in the front-to-back direction and arranged in the left-to-right direction. A pair of slits 261B penetrate the inner wall of the flexure piece receiving recess 261 in the up-down direction and are open at the rear. The inner wall of the flexure piece receiving recess 261 sandwiched between the pair of slits 261B is the base end side plate portion 263B of the flexure piece 262. The front end portion of the base end side plate portion 263B is connected to the protector body 51 via the base end connecting portion 266. By providing a pair of slits 261B in this way and using a portion of the inner wall of the flexure piece receiving recess 261 as the base end side plate portion 263B, the space used to form the flexure piece 262 can be reduced.

[0084] like Fig. 22 As shown, the flexure piece 262 of this embodiment includes a plurality of (three) plate portions 263 and a plurality of (two) connecting portions 264. The plurality of plate portions 263 are composed of a top end side plate portion 63A, a base end side plate portion 263B, and an intermediate plate portion 263C disposed between the top end side plate portion 63A and the base end side plate portion 263B. The plurality of connecting portions 264 are composed of a first connecting portion 264A and a second connecting portion 264B, wherein the first connecting portion 264A connects the front end portion of the top end side plate portion 63A and the front end portion of the intermediate plate portion 263C, and the second connecting portion 264B connects the rear end portion of the intermediate plate portion 263C and the rear end portion of the base end side plate portion 263B. In the flexure piece 262 of the present embodiment, the plurality of plate portions 263 and the plurality of connecting portions 264 are arranged in the order of the base end side plate portion 263B, the second connecting portion 264B, the intermediate plate portion 263C, the first connecting portion 264A, and the top end side plate portion 63A from the base end side (lower side) toward the top end side (upper side). That is, the plate portions 263 and the connecting portions 264 are alternately arranged in the up-and-down direction in which the flexure piece 262 is flexed, so that the flexure piece 262 is formed into a bellows shape.

[0085] In the storage module 210 (wiring module 220) of the third embodiment, when the terminal 30 is assembled to the protector 250, the rear end of the bent plate portion 33 is pressed against the inclined portion 65B of the locking protrusion 65 from the front side, and the flexure piece 262 is flexed downward. At this time, the plurality of plate portions 263 of the flexure piece 262 is one more than the plurality of plate portions 63 of the first embodiment, so the stress applied to the terminal 30 from the flexure piece 262 is reduced compared with the first embodiment. In addition, the base end side plate portion 263B is formed by cutting the inner wall of the flexure piece receiving recess 261, so the space occupied by the flexure piece 62 of the first embodiment is equal to the space occupied by the flexure piece 262 of the third embodiment.

[0086] [Effects of Embodiment 3] According to the third embodiment, the following actions and effects are achieved. In embodiment 3, the inner wall constituting the flexure piece housing recess 261 has a pair of slits 261B, the pair of slits 261B extend along the first direction and are arranged in a third direction orthogonal to both the first direction and the second direction, and the inner wall arranged between the pair of slits 261B is the base end side plate portion 263B.

[0087] According to such a configuration, the base end side plate portion 263B can be formed by utilizing the inner wall of the flexible piece accommodating recess 261 , so that the space for forming the flexible piece 262 can be reduced.

[0088] <Other Implementation Methods> (1) In the above embodiment, the joint portion 13 is formed by joining four electrode leads 12, but the present invention is not limited thereto. The joint portion may be formed by joining a plurality of electrode leads. (2) In the above embodiment, the terminal 30 is configured to have one receiving portion 36A, and the protector 50, 150, 250 is configured to have one flexible piece 62, 162, 262 for one terminal 30, but the present invention is not limited thereto. For example, the terminal may be configured to have two receiving portions, and the protector may be configured to have two flexible pieces for one terminal. (3) In the above embodiment, the terminal 30 has the opening 36 and the edge of the opening 36 has the receiving portion 36A, but the present invention is not limited thereto. For example, the terminal may have no opening but may have a receiving portion protruding from the bent plate. (4) In the above embodiment, the inclined portion 65B is formed in a planar shape, but is not limited thereto. Fig.23 As shown, the protector 350 of the power storage module 310 (wiring module 320 ) may include a flexible piece 362 , and the inclined portion 365B of the flexible piece 362 may be formed in a curved surface shape. Description of Reference Numerals

[0089] 10, 110, 210, 310: Power storage module 11: Laminated battery 11L: Battery stack 12: Electrode lead 12A: Connect electrode leads 12B: Output electrode lead 13: Joint 14: Output section 15: Cabinet 15A: Bottom 15B: Top 15C: Side 20, 120, 220, 320: Wiring modules 30: Terminal 31: Main body 32: Connection 33: Bending plate 34: Wire connection 34A: Base 34B: Tightening piece 34C: No. 1 tightening piece 34D: Second tightening piece 35: Bending part 36: Opening 36A: Lock receiving part 36B: Expanded opening 40: Busbar 40A: Part 1 40B: Part 2 41: Busbar side connection 41A: Through hole 45: Wire 46: Core wire 47: Insulation coating 48: Connector 48A: Shell 48B: Male terminal 50, 150, 250, 350: Protector 50A: Laying out concave part 51: Protector body 52: Electrode storage recess 52A: Connection electrode storage recess 52B: Output electrode storage recess 53: Bus bar holding part 53A: Bolt fastening part 54: Terminal storage part 55: Main body storage part 55A: Bottom wall 55B: Left wall 55C: Connecting hole 56: Concave 57: Wire connection storage 58: Contact Department 59: Inner wall 59A: 1st inner wall 59B: 2nd inner wall 59C: Sidewall 60, 160: Guide 61, 261: Flexure piece storage recess 61A: Entrance 62, 162, 262, 362: Flexure sheet 63, 163, 263: Plate 63A, 163A: Top side panel 63B, 263B: Base end side plate 64, 264: Connection 65: Locking protrusion 65A, 165A: Stopper 65B, 365B: inclined part 66, 266: Base end connection 261B: Slit 263C: Middle plate 264A: 1st connection 264B: Second connection

Claims

1. A wiring module mounted on a battery stack, the battery stack being formed by stacking a plurality of laminated batteries having electrode leads and having a joint portion where the electrode leads of the laminated batteries overlap and are joined, the wiring module comprising: terminal; an electric wire connected to the terminal; and protector, holding the terminal and the wire, The terminal comprises: a main body; a connecting portion extending from the main body, facing and connected to the electrode lead constituting the junction in a first direction; and a bent plate portion connected to the main body via a bent portion and extending toward the laminated battery side in the first direction. The protector comprises: a protector body; a recessed portion, which is recessed relative to the protector body toward the laminated battery side in the first direction and accommodates the bent plate portion; and at least one flexible piece, which extends from the protector body and can be bent and deformed in a second direction orthogonal to the first direction. The flexure piece comprises: a plurality of plate portions extending along the first direction and arranged at intervals in the second direction; and at least one connecting portion connecting the ends of two adjacent plate portions in the first direction. The plurality of plate portions include at least a base end side plate portion connected to the protector body and a tip end side plate portion arranged to face the terminal. The top end side plate portion includes a locking portion, the locking portion is arranged in the recessed portion and is locked with the bent plate portion from the side opposite to the laminated battery side in the first direction. The plate portions and the connecting portions are alternately connected from the base end side plate portion to the tip end side plate portion, so that the flexible piece is formed into a bellows shape.

2. The wiring module according to claim 1, wherein: The protector is formed with a plurality of electrode receiving recesses, the plurality of electrode receiving recesses penetrate the protector body along the first direction and receive the electrode leads. The plurality of electrode housing recesses are arranged in a third direction orthogonal to both the first direction and the second direction. The flexible piece is arranged between two adjacent electrode housing recesses.

3. The wiring module according to claim 1 or claim 2, wherein: The end portion of the front end side plate portion on the opposite side to the laminated battery side in the first direction is connected to the connection portion.

4. The wiring module according to claim 1 or claim 2, wherein: The distal end side plate portion includes a locking protrusion, the locking protrusion protruding from the distal end side plate portion to a side opposite to the proximal end side plate portion side in the second direction, The locking protrusion includes the locking portion disposed on the laminated battery side in the first direction and an inclined portion disposed on a side of the locking portion that is opposite to the laminated battery side in the first direction. The inclined portion is located at a position that is farther away from the base end side plate portion in the second direction as it goes toward the laminated battery side in the first direction.

5. The wiring module according to claim 1 or claim 2, wherein: The front end side plate portion is located at a position which is farther away from the base end side plate portion in the second direction as it goes toward the laminated battery side in the first direction.

6. The wiring module according to claim 1 or claim 2, wherein: The protector includes a guide portion on the side of the recessed portion that is opposite to the laminated battery side in the first direction, and the guide portion is disposed continuously with an inner wall of the recessed portion. The guide portion is inclined toward the inner side of the recessed portion as it goes toward the laminated battery side in the first direction.

7. The wiring module according to claim 1 or claim 2, wherein: The protector has a flexible piece housing recessed portion that is recessed from the protector body toward the laminated battery side in the first direction and houses a portion of the flexible piece.

8. The wiring module according to claim 7, wherein: The inner wall constituting the flexure piece receiving recess has a pair of slits, the pair of slits extending along the first direction and arranged in a third direction orthogonal to both the first direction and the second direction. The inner wall disposed between the pair of slits is the base end side plate portion.

9. The wiring module according to claim 1 or claim 2, wherein: At least one opening portion penetrating through the bent plate portion is formed in the terminal, The edge of the opening includes a locking receiving portion that is locked with the locking portion.

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