Wiring module

Abstract

This wiring module (20) is provided with: a detection terminal (30); a detection wire (45); a first housing part (55); a second housing part (56); an L-shaped third housing section (57) having a corner section (57B) on the inner peripheral side of the bent section (45C), connecting the first housing section (55) and the second housing section (56), and housing the bent section (45C); a pair of outer pressing pieces (58) which are provided so as to correspond to both end portions of the bent portion (45C), protrude from the outer peripheral side of the bent portion (45C) toward the inner peripheral side thereof, and press the bent portion (45C); and a pair of inner pressing pieces (59) provided corresponding to both end portions of the bent portion (45C), the inner pressing pieces (59) protruding from the inner peripheral side of the bent portion (45C) toward the outer peripheral side thereof and pressing the bent portion (45C). The pair of inner pressing pieces (59) are formed so as to protrude from at least a third side wall (57A) on the inner peripheral side of a pair of third side walls (57A) constituting both end portions of the third housing portion (57) to a position of a tangent line (T) disposed along the corner portion (57B) at an angle of 45 DEG with respect to the third side wall (57A).

Description

Technical Field

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

[0002] As a wiring module mounted on vehicles such as electric vehicles and hybrid vehicles, for example, a battery wiring module described in Japanese Patent Publication No. 2013-161566 (hereinafter referred to as Patent Document 1) is known. The battery wiring module includes: a bus bar that connects the electrode terminals of a pair of adjacent single cells to each other; a detection terminal that is connected to the bus bar; a detection wire that is connected to the wire connecting portion of the detection terminal; a bus bar storage portion that stores the bus bar; and a wire storage groove that stores the detection wire. The wire storage groove is configured to have a pair of groove wall portions and a bottom, and is formed to extend in the arrangement direction of the bus bar storage portion. A pair of wire pressing pieces 36A and 36B for pressing the detection wire are protrudingly formed on the groove wall portion of the wire storage groove. In addition, a notch is formed on the groove wall portion on the bus bar storage portion side of the pair of groove wall portions, and the notch is used to introduce the detection wire from the bus bar storage portion side into the wire storage groove.

[0003] The battery wiring module has the following problem. That is, the detection wires passing from the bus bar storage portion through the notch toward the wire storage groove hit the groove wall portion on the side opposite to the bus bar storage portion of the pair of groove walls and bend in the lateral direction (the direction in which the wire storage groove extends), and are routed along the groove wall portion due to the reaction force accompanying the bending. However, at such a bent portion, the detection wires may be exposed to the outside of the wire storage groove due to the reaction force.

[0004] In contrast, in the above-mentioned battery wiring module, the following structure is adopted: one side of the wire pressing plate 36B protrudes from the groove wall portion on the side opposite to the bus bar storage portion in a pair of groove wall portions, and the gap for inserting the detection wire formed on its end side is biased toward the bus bar storage portion side than the center line in the width direction of the wire storage groove, thereby effectively preventing the detection wire from extending to the outside of the wire storage groove at the bending portion.

[0005] In the above-mentioned battery wiring module, as disclosed in Patent Document 1 Figure 3 As shown, the busbar storage portion and the notch portion are connected via a tube holding portion, and the tube holding portion holds the wire connecting portion of the detection wire. The tube holding portion extends in a vertical direction relative to the wire storage slot, and the wire storage slot and the busbar storage portion are connected through the tube holding portion and the notch portion. A pair of wire pressing pieces 34A and 34B are arranged opposite to each other to prevent the detection wire led out of the tube holding portion from extending from the upper edge of the notch portion. The one of the pair of wire pressing pieces 34A and 34B located on the bending side of the detection wire ( Figure 3 The wire pressing piece on the left side of the figure (hereinafter referred to as the "left side") is the left wire pressing piece 34A, which is located on the side opposite to the bent side ( Figure 3 The wire pressing piece on the right side of the figure (hereinafter referred to as the “right side”) is the right side wire pressing piece 34B.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2013-161566 Summary of the invention

[0009] Problems to be solved by the invention

[0010] In the above-mentioned battery wiring module, the left-side wire pressing piece 34A is arranged at the position closest to the corner between the notch and the wire storage groove, but the wire pressing piece 36A in the wire storage groove is arranged at a position farther from the corner than the left-side wire pressing piece 34A. Sometimes, a connector is provided at the end on the side opposite to the detection terminal of the two ends of the detection wire. When the connector is engaged with the connector on the other side, the detection wire is pulled strongly, so that the detection wire is bent along the corner and arranged in the shortest path. Although the detection wire is pressed by the left-side wire pressing piece 34A on the notch side of the bending portion of the detection wire, there is no wire pressing piece for pressing the detection wire on the wire storage groove side of the bending portion, so the detection wire may be exposed to the outside of the wire storage groove at the bending portion.

[0011] The present disclosure has been made based on the above-described circumstances, and an object of the present disclosure is to suppress protrusion of a bent portion of a detection wire.

[0012] Means for solving problems

[0013] The wiring module of the present disclosure is installed in a single cell group formed by arranging a plurality of single cells having a pair of electrodes, wherein the wiring module comprises: a detection terminal connected to the electrode or connected to the electrode via a connecting member; a detection wire having a first wiring portion, a second wiring portion and a bending portion, wherein the first wiring portion is connected to the detection terminal and extends in a vertical direction perpendicular to the arrangement direction of the single cells, the second wiring portion extends in the arrangement direction of the single cells, the bending portion connects the first wiring portion and the second wiring portion and bends from the vertical direction to the arrangement direction; a first storage portion for storing the first wiring portion; a second storage portion for storing the second wiring portion; an L-shaped third wiring portion; a second storage portion for storing the second wiring portion; and a third wiring portion having an L-shaped shape. A storage portion having a corner portion on the inner circumference of the bent portion, connecting the first storage portion and the second storage portion and storing the bent portion; a pair of outer pressing pieces, which are provided in correspondence with the two end portions of the bent portion, and protrude from the outer circumference of the bent portion toward the inner circumference to press the bent portion; and a pair of inner pressing pieces, which are provided in correspondence with the two end portions of the bent portion, and protrude from the inner circumference of the bent portion toward the outer circumference to press the bent portion, the pair of inner pressing pieces being formed to protrude from at least the inner circumference of a pair of third side walls constituting the two end portions of the third storage portion to a position of a tangent arranged along the corner portion at an angle of 45° relative to the third side wall.

[0014] Effects of the Invention

[0015] According to the present disclosure, it is possible to suppress protrusion of the bent portion of the detection wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a perspective view showing the front portion of the power storage module according to the first embodiment.

[0017] Figure 2 This is a front view of the power storage module.

[0018] Figure 3 It is a perspective view of the front part of the battery stack.

[0019] Figure 4 It is a perspective view showing the main parts of a laminate type battery.

[0020] Figure 5 yes Figure 2 AA section view.

[0021] Figure 6 It is a front view showing a state where the bent portion is accommodated in the third accommodation portion in a state where the detection wire has excess length.

[0022] Figure 7 This is a front view showing a state where the detection wires are stored in the first storage portion and the third storage portion.

[0023] Figure 8 It is a front view showing a state where the bent portion is accommodated in the third accommodation portion in a state where the detection wire is pulled.

[0024] Fig. 9 yes Figure 8 BB cross-sectional view.

[0025] Fig.10 yes Figure 8 CC cross-sectional view.

[0026] Fig.11 yes Figure 8 The main part enlarged view is a diagram illustrating that a pair of inner pressing pieces are arranged at the closest position relative to the corner. DETAILED DESCRIPTION

[0027] [Description of Embodiments of the Present Disclosure]

[0028] First, embodiments of the present disclosure will be described below.

[0029] (1) The wiring module of the present disclosure is installed in a battery pack formed by arranging a plurality of battery cells having a pair of electrodes, wherein the wiring module comprises: a detection terminal connected to the electrode or connected to the electrode via a connecting member; a detection wire having a first wiring portion, a second wiring portion, and a bending portion, wherein the first wiring portion is connected to the detection terminal and extends in a vertical direction perpendicular to the arrangement direction of the battery cells, the second wiring portion extends in the arrangement direction of the battery cells, the bending portion connects the first wiring portion and the second wiring portion and bends from the vertical direction to the arrangement direction; a first storage portion for storing the first wiring portion; a second storage portion for storing the second wiring portion; an L-shaped A third storing portion having a corner portion on the inner circumference of the bending portion, connecting the first storing portion and the second storing portion and storing the bending portion; a pair of outer pressing pieces, which are provided in correspondence with the two end portions of the bending portion, and protrude from the outer circumference of the bending portion toward the inner circumference to press the bending portion; and a pair of inner pressing pieces, which are provided in correspondence with the two end portions of the bending portion, and protrude from the inner circumference of the bending portion toward the outer circumference to press the bending portion, the pair of inner pressing pieces being formed to protrude from at least the inner circumference of a pair of third side walls constituting the two end portions of the third storing portion to a position of a tangent arranged along the corner portion at an angle of 45° relative to the third side wall.

[0030] Here, 45° does not need to be strictly 45°, and may have a tolerance of ±5°, for example. In this case, the tangent line may be arranged along the corner within a range of 40° to 50°. In addition, the third side wall does not need to protrude strictly to the position of the tangent line, but only needs to protrude at least to the position of the tangent line, and may protrude beyond the position of the tangent line.

[0031] The detection wires passing from the first storage section through the third storage section toward the second storage section are bent from the vertical direction to the arrangement direction along the third side wall on the outer peripheral side by the reaction force at the bending section. However, at the bending section, the detection wires may be exposed to the outside of the third storage section due to the reaction force. Therefore, in the above-mentioned wiring module, a pair of outer pressing pieces are provided corresponding to the two ends of the bending section, so that the extension of the bending section of the detection wire can be suppressed.

[0032] In addition, for example, a connector is provided at the end of the detection wire on the side opposite to the detection terminal, and when the detection wire is strongly pulled when the connector is mated with the connector on the other side, the bent portion of the detection wire is bent along the corner of the third storage portion and arranged in the shortest path. In contrast, in the above-mentioned wiring module, a pair of inner pressing pieces are provided corresponding to the two ends of the bent portion, and the pair of inner pressing pieces are formed to protrude from at least the third side wall on the inner peripheral side of a pair of third side walls constituting the two end portions of the third storage portion to the position of the tangent arranged along the corner at an angle of 45° relative to the third side wall, thereby suppressing the extension of the bent portion of the detection wire.

[0033] (2) Preferably, the first storage portion has a pair of first side walls respectively connected to the pair of third side walls, and a pair of first pressing plates for pressing the first wiring portion are arranged on the pair of first side walls in an opposite configuration to each other, and the third gap formed between the outer pressing plate and the inner pressing plate located on the first storage portion side and opposite to each other in the third storage portion and the first gap formed between the pair of first pressing plates have the same size and are arranged on the same straight line extending along the vertical direction.

[0034] Here, the same dimensions do not need to be strictly the same dimensions. When the first gap and the third gap are observed from the vertical direction, it is sufficient that more than 50% of the total dimensions overlap, and it is sufficient that the detection wires can be accommodated in the first storage portion and the third storage portion in a state extending in a straight line.

[0035] Since the third gap and the first gap have the same size and are arranged on the same straight line extending in the vertical direction, the detection wires can be stored and wired in the first and third storage portions in a state extending in a straight line in the vertical direction, which can improve the wiring operability of the detection wires.

[0036] (3) Preferably, the end of the first pressing piece is formed into a mountain shape, and the first gap is formed between the ends of a pair of the first pressing pieces, i.e., at the narrowest portion; the end of the outer pressing piece and the end of the inner pressing piece are both formed into a mountain shape, and the third gap is formed between the end of the outer pressing piece located on the first storing portion side and the end of the inner pressing piece in the third storing portion, i.e., at the narrowest portion.

[0037] Since the tips of the outer pressing piece, the inner pressing piece and the first pressing piece are formed in a mountain shape, the size of the narrowest part where it is most difficult for the detection wires to pass is reduced, and the wiring workability of the detection wires can be further improved.

[0038] [Details of the embodiments of the present disclosure]

[0039] Hereinafter, embodiments of the present disclosure will be described. The present disclosure is not limited to these examples, but is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0040] <Implementation Method>

[0041] Reference Figures 1 to 11 The embodiment 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 is labeled, and the labels of the 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 up-down direction is an example of a vertical direction, and the left-right direction is an example of an arrangement direction.

[0042] [Battery stack]

[0043] The power storage module 10 includes Figure 3 The battery stack 11L shown in the figure and the wiring module 20 mounted on the battery stack 11L. Figure 1 As shown, the power storage module 10 of this embodiment further includes a housing 15 that covers the battery stack 11L from four directions: top, bottom, left, and right. The housing 15 is composed of a bottom 15A disposed on the lower surface side of the battery stack 11L, a top 15B disposed 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.

[0044] [Laminated batteries, electrode leads]

[0045] like Figure 3As shown, the battery stack 11L is formed by stacking a plurality of (18 in this embodiment) laminated batteries 11 in the left-right direction. Figure 3 In FIG. 1 , only the front side portion of the battery stack 11L is shown. Figure 4 As shown, the laminated battery 11 is long in the front-to-back direction and flat in the left-to-right direction. A 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, protruding in opposite directions. The pair of electrode leads 12 are plate-shaped and have opposite polarities.

[0046] [Joint]

[0047] like Figure 3 and Figure 5 As shown, a joint 13 is provided in the battery stack 11L, and the joint 13 electrically connects the four electrode leads 12 of the laminated battery 11 arranged continuously in the left-right direction. That is, the four electrode leads 12 are bent to the left or right at approximately right angles and overlap, and are joined by laser welding, thereby forming the joint 13. The electrode lead 12 constituting the joint 13 is a connecting electrode lead 12A. The two connecting electrode leads 12A arranged on the right and the two connecting electrode leads 12A arranged on the left of the four connecting electrode leads 12A 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 Figure 3 As shown, the battery stack 11L includes four joining parts 13 at the front. Although not shown, the battery stack 11L also includes four joining parts 13 at the rear.

[0048] The forming process of 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 be large. For example, in the present embodiment, the tolerance of the joint 13 (and the connecting electrode lead 12A) in the front-to-back direction is a value larger than the thickness of the electrode lead 12 (0.2 mm, 0.4 mm).

[0049] like Figure 3 and Figure 5As 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.

[0050] [Wiring module]

[0051] like Figure 1 As shown, the wiring module 20 of this embodiment includes: a detection terminal 30 connected to the connection electrode lead 12A; a bus bar 40 connected to the output electrode lead 12B; a detection wire 45 connected to the detection terminal 30; and a protector 50 that holds the detection terminal 30, the bus bar 40, and the detection wire 45. The structure of the wiring module 20 arranged on the front side of the 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 storage module 10 is configured in the same manner as the wiring module 20 arranged on the front side of the storage module 10.

[0052] 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.

[0053] 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 fastened to the bus bar side connection part 41 by a bolt. 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) to the power storage module 10.

[0054] [Detection wire]

[0055] The detection wire 45 has a core wire and an insulating coating layer covering the core wire. One end of the detection wire 45 is connected to the detection terminal 30 for detecting the voltage of each laminated battery 11. Figure 1 and Figure 2 As shown, the other ends of the detection wires 45 are gathered into a bundle and connected to the connector 48. The detection wires 45 are wired in the wiring recess 50A of the protector 50 and wired at a predetermined position. The detection wires of the claims include, in addition to the wires connected to the detection terminals 30, devices for detecting the current, temperature, etc. of each laminated battery 11, and wires connected to other control units.

[0056] like Figure 2 As shown, the connector 48 has 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 well-known structure having functions such as detecting the voltage, current, temperature, etc. of each laminated battery 11, and controlling the charge and discharge of each laminated battery 11.

[0057] [Detection terminal]

[0058] The detection terminal 30 is provided by processing a conductive metal plate. Figure 2 As shown, the detection terminal 30 includes a main body 31, a connecting portion 32 extending to the right from the main body 31, and a wire connecting portion 34 extending upward from the main body 31. The main body 31 is arranged on the right side of the detection terminal 30 and is rectangular in front view. The main body 31 is accommodated in the terminal receiving portion 54 in such a way that the plate thickness direction becomes the front-back direction. A terminal holding portion 54A is provided at the lower end of the terminal receiving portion 54 to hold the detection terminal 30 inside the terminal receiving portion 54.

[0059] The connection portion 32 is in a rectangular shape that is long in the left-right direction and is formed to be coplanar with the main body portion 31. The connection portion 32 protrudes upward and downward from the main body portion 31 in the vertical direction. Figure 5 As shown, the connection portion 32 is provided in a manner of being connected by surface contact with the joint portion 13 or a part of the connection electrode lead 12A constituting the joint portion 13. That is, the detection terminal 30 is not a member for connecting adjacent connection electrode leads 12A, but a member for connecting the connection electrode lead 12A (joint portion 13) connected in advance to the detection 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.

[0060] [Protector]

[0061] 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 relative to the housing 15 (and the battery stack 11L). Figure 2 As shown in FIG. 1 , a plurality of electrode receiving recesses 52 are arranged in parallel in the left-right direction at the central portion in the up-down direction of the protector body 51. The electrode receiving recesses 52 are formed through in the front-to-back direction and are rectangular and long in the up-down 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.

[0062] 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 detection terminal 30 is provided on the oblique lower left side of the connection electrode receiving recess 52A. The terminal receiving portion 54 is formed to be recessed backward from the protector body 51.

[0063] [Wiring recess]

[0064] The wiring recess 50A is formed by being recessed backward from the protector body 51 in the same manner as the terminal receiving portion 54. The interior of the wiring recess 50A is connected to the interior of the terminal receiving portion 54, and the detection wire 45 drawn from the detection terminal 30 received in the terminal receiving portion 54 is received and wired in the wiring recess 50A. The wiring recess 50A includes: a first receiving portion 55 connected to the upper portion of the terminal receiving portion 54 and extending in the vertical direction; a second receiving portion 56 arranged above the first receiving portion 55 and extending in the left-right direction; and a third receiving portion 57 connecting the first receiving portion 55 and the second receiving portion 56.

[0065] The first storage portion 55 is formed adjacent to the right side of the connection electrode storage recess 52A. The second storage portion 56 is formed adjacent to the upper side of the connection electrode storage recess 52A. The third storage portion 57 is L-shaped, connecting the upper end of the first storage portion 55 and the left end of the second storage portion 56 located on the upper right of the first storage portion 55. The corner portion 57B is located on the upper left of the connection electrode storage recess 52A, and is located on the inner circumference of the bent portion 45C described below.

[0066] The detection wire 45 has a first wiring portion 45A connected to the detection terminal 30 and extending in a vertical direction perpendicular to the arrangement direction of the laminated batteries 11, that is, in the vertical direction, a second wiring portion 45B extending in the arrangement direction of the laminated batteries 11, that is, in the horizontal direction, and a bent portion 45C connecting the first wiring portion 45A and the second wiring portion 45B and bending from the vertical direction to the horizontal direction. The detection wire 45 has a surplus length required when wiring to the wiring recess 50A or when the connector 48 is mated with the connector on the other side. Therefore, if Figure 6 As shown, the detection wire 45 generates a reaction force at the bent portion 45C, and is stored in the third storage portion 57 in a state of being expanded toward the outer peripheral side.

[0067] The first storage section 55 stores the first wiring section 45A of the detection wire 45, the second storage section 56 stores the second wiring section 45B of the detection wire 45, and the third storage section 57 stores the bent section 45C of the detection wire 45. Figure 6 The L-shaped region enclosed by the dotted line is a region that accommodates the bent portion 45C.

[0068] The two ends of the third storage portion 57 are composed of a pair of third side walls 57A, the pair of third side walls 57A located at the lower end side are opposite to each other in the left-right direction, and the pair of third side walls 57A located at the right end side are opposite to each other in the up-down direction. In addition, the side wall located on the right side of the pair of third side walls 57A located at the lower end side is the third side wall 57A on the outer peripheral side, and the side wall located on the left side is the third side wall 57A on the inner peripheral side. Similarly, the side wall located on the upper side of the pair of third side walls 57A located at the right end side is the third side wall 57A on the outer peripheral side, and the side wall located on the lower side is the third side wall 57A on the inner peripheral side.

[0069] A pair of outer pressing pieces 58 and a pair of inner pressing pieces 59 are formed at both ends of the third storage portion 57. The pair of outer pressing pieces 58 are provided in a pair corresponding to both ends of the bent portion 45C, and protrude from the outer peripheral side of the bent portion 45C toward the inner peripheral side to press the bent portion 45C from the front. The pair of inner pressing pieces 59 are provided in a pair corresponding to both ends of the bent portion 45C, and protrude from the inner peripheral side of the bent portion 45C toward the outer peripheral side to press the bent portion 45C from the front.

[0070] The outer pressing piece 58 has a function to suppress the detection wire 45 from being exposed to the outside when the detection wire 45 is arranged on the outer peripheral side away from the corner 57B due to the reaction force of the detection wire 45 in a state where the detection wire 45 has excess length. The inner pressing piece 59 has a function to suppress the detection wire 45 from being exposed to the outside when the detection wire 45 is pulled during the operation of fitting the connector 48 with the other connector or when the detection wire 45 is arranged on the inner peripheral side near the corner 57B in a state where the detection wire 45 has no excess length.

[0071] More specifically, the pair of outer pressing pieces 58 are formed by the outer pressing piece 58 protruding downward from the third side wall 57A on the upper side of the right end side of the third storage portion 57, and the outer pressing piece 58 protruding rightward from the third side wall 57A on the left side of the lower end side of the third storage portion 57. On the other hand, the pair of inner pressing pieces 59 are formed by the inner pressing piece 59 protruding upward from the third side wall 57A on the lower side of the right end side of the third storage portion 57, and the inner pressing piece 59 protruding leftward from the third side wall 57A on the right side of the lower end side of the third storage portion 57.

[0072] The pair of outer pressing pieces 58 are formed to have a smaller protruding dimension than the pair of inner pressing pieces 59. However, the detection wire 45 is usually wired in the wiring recess 50A with an excess length, so the two ends of the bent portion 45C are arranged behind the pair of outer pressing pieces 58 by the reaction force and are pressed from the front by the pair of outer pressing pieces 58.

[0073] The first storage portion 55 has a pair of first side walls 55A respectively connected to the lower side of a pair of third side walls 57A located on the lower end side of the third storage portion 57. A pair of first pressing pieces 61 for pressing the first wiring portion 45A are provided on the pair of first side walls 55A in a mutually opposed arrangement. The left first pressing piece 61 is formed to protrude rightward from the left first side wall 55A, and the right first pressing piece 61 is formed to protrude leftward from the right first side wall 55A.

[0074] The gap formed between the outer pressing piece 58 and the inner pressing piece 59 located at the lower end side of the third storage portion 57 and facing each other is set as the third gap S3, and the gap formed between the pair of first pressing pieces 61 is set as the first gap S1. Figure 7 As shown, the first gap S1 and the third gap S3 have substantially the same size and are arranged side by side on the same straight line L extending in the vertical direction. If the gaps S1 and S3 are arranged in this way, when the detection wires 45 are accommodated in the wiring recess 50A and wired, the detection wires 45 can be accommodated in a straightly extending state, so the wiring work becomes easy and the workability is improved.

[0075] The ends of the first pressing pieces 61 are formed in a mountain shape, and a first gap S1 is formed between the ends of the pair of first pressing pieces 61, that is, at the narrowest portion. In addition, a third gap S3 is formed between the ends of the outer pressing piece 58 and the inner pressing piece 59 located at the lower end side of the third receiving portion 57, that is, at the narrowest portion. When the detection wire 45 is received in the wiring recess 50A for wiring, it is most difficult to pass the detection wire 45 through the narrowest portion. However, according to the above structure, the size of the narrowest portion in the vertical direction is the smallest, so the wiring workability of the detection wire 45 can be further improved.

[0076] [Configuration of inner pressing piece]

[0077] Next, refer to Figures 8 to 11 The configuration of the inner pressing piece 59 is described. The pair of inner pressing pieces 59 are configured at the closest position relative to the corner 57B of the third storage section 57. A punching hole 62 for pulling out the mold when forming them is formed behind the outer pressing piece 58 and the inner pressing piece 59. If the pair of inner pressing pieces 59 are brought close to the corner 57B on the basis of considering the offset tolerance in manufacturing, the wall thickness of the area sandwiched by the pair of punching holes 62 becomes smaller, so the strength of the bottom wall of the third storage section 57 is reduced. Therefore, the above-mentioned closest position refers to the position where the pair of inner pressing pieces 59 can be brought close to the corner 57B within a range that does not cause the problem of reduced strength.

[0078] like Figure 8 As shown in FIG. 1 , when the connector 48 is mated with the other connector and the detection wire 45 is strongly pulled to the outside of the protector 50, the detection wire 45 takes the shortest path. Here, assuming that the pair of inner pressing pieces 59 are not arranged at the closest position, the detection wire 45 may be exposed to the front from the third storage portion 57 at the corner 57B. In this regard, in the present embodiment, since the pair of inner pressing pieces 59 are arranged at the closest position, even when the detection wire 45 takes the shortest path, since the detection wire 45 is arranged behind the pair of inner pressing pieces 59, the detection wire 45 can be reliably pressed from the front by the pair of inner pressing pieces 59.

[0079] It is known that Fig. 9 At the lower end of the third storage portion 57 shown in FIG. 1 , the bent portion 45C of the detection wire 45 is located behind the inner pressing piece 59, which can prevent the bent portion 45C from being exposed forward from the third storage portion 57. Fig.10 At the right end of the third housing portion 57 shown, the bent portion 45C of the detection wire 45 is located behind the inner pressing piece 59, and the bent portion 45C can be prevented from being exposed forward from the third housing portion 57. The separation dimension between the end of the outer pressing piece 58 and the end of the inner pressing piece 59, that is, the narrowest portion, is the same as or slightly smaller than the outer diameter of the detection wire 45, so the detection wire 45 is not easily exposed to the outside of the wiring recess 50A at the narrowest portion.

[0080] Reference Fig.11The reason why the detection wire 45 can be reliably pressed by the pair of inner pressing pieces 59 when the detection wire 45 takes the shortest path is described. First, a tangent line T arranged along the corner 57B at an angle of 45° relative to the third side wall 57A is drawn. The tangent line T is a tangent line T that is tangent to the corner 57B, and is arranged at an angle of 45° relative to the third side wall 57A located on the lower end side of the third storage section 57, and also at an angle of 45° relative to the third side wall 57A located on the right end side of the third storage section 57. The pair of inner pressing pieces 59 are both formed to protrude from the third side wall 57A on the inner peripheral side to the position of the tangent line T. As a result, the oblique side 59A close to the corner 57B of the pair of oblique sides 59A formed at the ends of the inner pressing pieces 59 is arranged along the tangent line T.

[0081] When the detection wire 45 takes the shortest path, the detection wire 45 passes through the inner peripheral side of the tangent line T at the position of the inner pressing piece 59, so when the inner pressing piece 59 is formed to protrude to the position of the tangent line T, the detection wire 45 is definitely located behind the inner pressing piece 59. Therefore, the detection wire 45 is pressed from the front by the pair of inner pressing pieces 59 at both ends of the third storage portion 57, so that the detection wire 45 is not exposed to the front at the corner 57B.

[0082] [Effects of the Embodiments]

[0083] According to the embodiment, the following actions and effects are achieved.

[0084] The wiring module 20 of the embodiment is installed on a battery stack 11L in which a plurality of laminated batteries 11 having a pair of electrode leads 12 are arranged, wherein the wiring module 20 comprises: a detection terminal 30 connected to the electrode lead 12; a detection wire 45 having a first wiring portion 45A connected to the detection terminal 30 and extending in the vertical direction, a second wiring portion 45B extending in the left-right direction, and a bending portion 45C connecting the first wiring portion 45A and the second wiring portion 45B and bending from the vertical direction to the left-right direction; a first storage portion 55 for storing the first wiring portion 45A; a second storage portion 56 for storing the second wiring portion 45B; and an L-shaped third storage portion 57 having a corner portion on the inner circumference of the bending portion 45C. 57B, connecting the first storage portion 55 and the second storage portion 56 and storing the bent portion 45C; a pair of outer pressing pieces 58, which are provided in correspondence with the two end portions of the bent portion 45C, and protrude from the outer peripheral side of the bent portion 45C toward the inner peripheral side to press the bent portion 45C; and a pair of inner pressing pieces 59, which are provided in correspondence with the two end portions of the bent portion 45C, and protrude from the inner peripheral side of the bent portion 45C toward the outer peripheral side to press the bent portion 45C, and the pair of inner pressing pieces 59 are protruded from at least the inner peripheral side of a pair of third side walls 57A constituting the two end portions of the third storage portion 57 to the position of the tangent T arranged along the corner portion 57B at an angle of 45° relative to the third side wall 57A.

[0085] The detection wire 45 that passes through the third storage portion 57 from the first storage portion 55 toward the second storage portion 56 is bent from the vertical direction to the left and right direction along the third side wall 57A on the outer peripheral side at the bent portion 45C by the reaction force. However, at the bent portion 45C, the detection wire 45 may be exposed to the outside of the third storage portion 57 due to its reaction force. Therefore, in the above-mentioned wiring module 20, since a pair of outer pressing pieces 58 are provided corresponding to both ends of the bent portion 45C, it is possible to suppress the bent portion 45C of the detection wire 45 from protruding.

[0086] In addition, for example, the connector 48 is provided at the end on the side opposite to the detection terminal 30 of the two ends of the detection wire 45. When the detection wire 45 is strongly pulled when the connector 48 is mated with the other connector, the bent portion 45C of the detection wire 45 is bent along the corner 57B of the third storage portion 57 and arranged in the shortest path. In contrast, in the above-mentioned wiring module 20, a pair of inner side pressing pieces 59 are provided corresponding to the two ends of the bent portion 45C. The pair of inner side pressing pieces 59 are formed to protrude from at least the third side wall 57A on the inner peripheral side of the pair of third side walls 57A constituting the two ends of the third storage portion 57 to the position of the tangent line T arranged along the corner 57B at an angle of 45° with respect to the third side wall 57A, so that the bent portion 45C of the detection wire 45 can be suppressed from protruding.

[0087] In an embodiment, the first storage portion 55 has a pair of first side walls 55A respectively connected to a pair of third side walls 57A, and a pair of first pressing pieces 61 for pressing the first wiring portion 45A are arranged on the pair of first side walls 55A in a configuration opposite to each other. The third gap S3 formed between the outer pressing piece 58 and the inner pressing piece 59 located on the side of the first storage portion 55 and opposite to each other in the third storage portion 57 and the first gap S1 formed between the pair of first pressing pieces 61 have the same size and are arranged on the same straight line L extending in the up and down directions.

[0088] Since the third gap S3 and the first gap S1 have the same size and are arranged on the same straight line L extending in the up-down direction, the detection wire 45 can be stored and wired in the first storage portion 55 and the third storage portion 57 in a state extending in a straight line in the up-down direction, thereby improving the wiring operability of the detection wire 45.

[0089] In an embodiment, the end of the first pressing piece 61 is formed in a mountain shape, and a first gap S1 is formed between the ends of a pair of first pressing pieces 61, i.e., at the narrowest portion. The ends of the outer pressing piece 58 and the inner pressing piece 59 are both formed in a mountain shape, and a third gap S3 is formed in the third receiving portion 57 between the end of the outer pressing piece 58 located on the side of the first receiving portion 55 and the end of the inner pressing piece 59, i.e., at the narrowest portion.

[0090] The ends of the outer pressing piece 58 , the inner pressing piece 59 , and the first pressing piece 61 are formed in a mountain shape. Therefore, the size of the narrowest portion where the detection wire 45 is most difficult to pass is reduced, and the wiring workability of the detection wire 45 can be further improved.

[0091] <Other Implementation Methods>

[0092] (1) In the above embodiment, the detection terminal 30 is directly connected to the joint portion 13 (connected electrode lead 12A). However, the detection terminal 30 may be connected to the joint portion 13 (connected electrode lead 12A) via a connection member such as a bus bar.

[0093] (2) In the above embodiment, the configuration in which the pair of first pressing pieces 61 are disposed at only one location is exemplified. However, the pair of first pressing pieces 61 may be disposed at a plurality of locations.

[0094] (3) In the above embodiment, the tips of the outer pressing piece 58, the inner pressing piece 59, and the first pressing piece 61 are all formed in a mountain shape. However, the present invention is not limited thereto and may be an arc shape other than a mountain shape or a flat shape extending in the vertical direction.

[0095] (4) In the above embodiment, the joining portion 13 is formed by joining four electrode leads 12 , but the present invention is not limited thereto. The joining portion may be formed by joining a plurality of electrode leads.

[0096] Description of symbols

[0097] 10: Power storage module

[0098] 11: Laminated battery (single cell)

[0099] 11L: Battery stack (single battery pack)

[0100] 12: Electrode lead (electrode)

[0101] 12A: Connect electrode leads

[0102] 12B: Output electrode lead

[0103] 13: Joint

[0104] 15: Shell

[0105] 15A: Bottom

[0106] 15B: Top

[0107] 15C: Side

[0108] 20: Wiring module

[0109] 30: Detection terminal

[0110] 31: Main body

[0111] 32: Connection

[0112] 34: Wire connection

[0113] 40: Busbar

[0114] 40A: Part I

[0115] 40B: Part 2

[0116] 41: Busbar side connection

[0117] 41A: Through hole

[0118] 45: Detection of wires

[0119] 45A: First wiring section

[0120] 45B: Second wiring section

[0121] 45C: Bending part

[0122] 48: Connector

[0123] 48A: Shell

[0124] 48B: Male terminal

[0125] 50: Protector

[0126] 50A: Wiring recess

[0127] 51: Protector body

[0128] 52: Electrode storage recess

[0129] 52A: Connection electrode storage recess

[0130] 52B: Output electrode storage recess

[0131] 53: Bus bar holding part

[0132] 53A: Bolt fastening part

[0133] 54: Terminal storage part

[0134] 54A: Terminal holding part

[0135] 55: First storage area

[0136] 55A: First side wall

[0137] 56: Second storage area

[0138] 57: The third storage area

[0139] 57A: Third side wall

[0140] 57B: Corner

[0141] 58: Outer pressure piece

[0142] 59: Inner pressing piece

[0143] 59A: Bevel

[0144] 60: Tangent

[0145] 61: First pressing piece

[0146] 62: Punching

[0147] L: Straight line

[0148] S1: First gap

[0149] S3: The Third Gap

[0150] T: Tangent

Claims

1. A wiring module mounted on a battery pack formed by arranging a plurality of battery cells having a pair of electrodes, wherein: The wiring module has: A detection terminal connected to the electrode or connected to the electrode via a connecting member; A detection wire having a first wiring portion, a second wiring portion, and a bent portion, wherein the first wiring portion is connected to the detection terminal and extends in a vertical direction perpendicular to the arrangement direction of the single cells, the second wiring portion extends in the arrangement direction of the single cells, and the bent portion connects the first wiring portion and the second wiring portion and bends from the vertical direction to the arrangement direction; a first storage portion for storing the first wiring portion; a second storage portion for storing the second wiring portion; An L-shaped third storage portion having a corner portion on the inner peripheral side of the bent portion, connecting the first storage portion and the second storage portion and storing the bent portion; a pair of outer pressing pieces, provided in pair corresponding to both ends of the bent portion, protruding from the outer peripheral side toward the inner peripheral side of the bent portion to press the bent portion; and A pair of inner pressing pieces are provided corresponding to the two ends of the bent portion, and protrude from the inner peripheral side of the bent portion toward the outer peripheral side to press the bent portion. The pair of inner pressing pieces are formed to protrude from at least the inner third side wall of a pair of third side walls constituting both end portions of the third housing portion to a position of a tangent line arranged along the corner at an angle of 45° with respect to the third side wall.

2. The wiring module according to claim 1, wherein: The first storage portion has a pair of first side walls respectively connected to the pair of third side walls. A pair of first pressing pieces for pressing the first wiring portion are provided on the pair of first side walls so as to be opposed to each other. The third gap formed between the outer pressing piece and the inner pressing piece located on the first storing portion side and opposite to each other in the third storing portion and the first gap formed between the pair of first pressing pieces have the same size and are arranged on the same straight line extending along the vertical direction.

3. The wiring module according to claim 2, wherein: The end of the first pressing piece is formed into a mountain shape, and the first gap is formed between the ends of a pair of the first pressing pieces, that is, at the narrowest part. The ends of the outer pressing piece and the inner pressing piece are both formed into a mountain shape, and the third gap is formed in the narrowest part between the ends of the outer pressing piece and the inner pressing piece located on the first storing part side in the third storing part.

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