Battery wiring module

Abstract

To provide a battery wiring module which can inhibit lifting of a case.SOLUTION: A case 22 has a second extending piece 51 engaged with a second engaged part 81 provided at a battery. The second extending piece 51 has: a third portion 52 which extends in such a manner as to be away from the battery; a fourth portion 53 which is folded from the third portion 52 and extends to the battery; and a second engagement part 54 which is provided at the fourth portion 53 and is engaged with the second engaged part 81.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] For example, as disclosed in Patent Document 1, in vehicles such as electric vehicles and hybrid vehicles, a high-voltage battery mounted as a power source for driving is equipped with a battery wiring module. The battery wiring module includes an electric wire electrically connected to the battery and a case for housing the electric wire.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a state where the battery wiring module is attached to the battery, there is a risk that the case may separate from the battery, so-called lifting occurs. An object of the present disclosure is to provide a battery wiring module capable of suppressing the lifting of the case.

Means for Solving the Problems

[0005] The battery wiring module of the present disclosure is a battery wiring module attached to a battery, and includes an electric wire electrically connected to the battery and a case for housing the electric wire. The case has an extension piece locked to a locked portion provided on the battery. The extension piece has a first portion extending away from the battery, a second portion folded back from the first portion and extending toward the battery, and a locking portion provided on the second portion and locked to the locked portion.

Effects of the Invention

[0006] The battery wiring module of this disclosure has the effect of suppressing the lifting of the case. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a schematic plan view of the battery wiring module of the embodiment. [Figure 2] Figure 2 is a perspective view showing a portion of the case in a battery wiring module of the same configuration. [Figure 3] Figure 3 is a plan view showing a portion of the case in a battery wiring module of the same configuration. [Figure 4] Figure 4 is a cross-sectional view taken along line 4-4 in Figure 3. [Figure 5] Figure 5 is a cross-sectional view illustrating the function of the first extension piece in a battery wiring module of the same configuration. [Modes for carrying out the invention]

[0008] [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described. The battery wiring module of this disclosure is [1] A battery wiring module to be attached to a battery, comprising an electric wire electrically connected to the battery and a case for housing the electric wire, wherein the case has an extension piece that is locked to a locking portion provided on the battery, the extension piece having a first portion that extends away from the battery, a second portion that is folded back from the first portion and extends toward the battery, and a locking portion provided on the second portion that is locked to the locking portion.

[0009] This configuration allows the case to be held in place by an extension that engages with the battery's locking portion, preventing it from separating from the battery. This suppresses the case from lifting up. Furthermore, the extension is flexible due to the folded shape formed by the first and second portions, allowing the locking portion on the second portion to be easily engaged with the locking portion. In addition, the first and second portions form a folded shape that is convex toward the battery. This makes it possible to secure space on the opposite side of the battery from the extension.

[0010] [2] In the above [1], the extension may have a first bending point set at the base end of the first portion and a second bending point set at the folded portion between the first portion and the second portion.

[0011] This configuration allows the extended piece to be more flexible due to the first and second bending points. This makes it easier to lock the locking portion provided in the second part to the locking portion.

[0012] [3] In the above [2], when the battery side with respect to the extension piece is considered to be the lower side and the opposite side is considered to be the upper side, the first bending point may be provided below the locking portion and the second bending point may be provided above the locking portion.

[0013] In this configuration, when the case is assembled to the battery, the second portion bends towards the first portion around the second bending point. The first portion then bends away from the locking portion around the first bending point. As a result, the locking portion is displaced downward, i.e., towards the battery, when engaging with the locking portion. This makes it easier to lock the locking portion of the extension piece to the locking portion.

[0014] [4] In any one of [1] to [3] above, the case has a sensor housing portion for housing a temperature sensor for detecting the temperature of the battery. The temperature sensor has a lead wire. When the battery side with respect to the extending piece is the lower side and the opposite side is the upper side, the lead wire may pass through the upper side of the extending piece.

[0015] According to this configuration, since the lead wire of the temperature sensor passes through the space above the extending piece, it is possible to effectively utilize this space. [5] In [4] above, taking the extending piece as the first extending piece and the engaged portion as the first engaged portion, the case has a second extending piece that is engaged with a second engaged portion provided on the battery. The sensor housing portion may be provided between the first extending piece and the second extending piece.

[0016] According to this configuration, the first extending piece and the second extending piece can hold the case so that it does not separate from the battery on both sides of the sensor housing portion. Thereby, it is possible to more preferably suppress the lifting of the portion including the sensor housing portion in the case.

[0017] [6] In [5] above, taking the engaged portion of the first extending piece as the first engaged portion, the second extending piece may have a third portion that extends toward the battery, a fourth portion that is folded back from the third portion and extends away from the battery, and a second engaged portion provided on the fourth portion and engaged with the second engaged portion.

[0018] According to this configuration, since the second extending piece can be bent by the folded shape formed by the third portion and the fourth portion, it is possible to easily engage the second engaged portion provided on the fourth portion with the second engaged portion. Since the lead wire of the temperature sensor passes through the upper side of the first extending piece, even if no space is secured above the second extending piece, it has no influence on the arrangement of the lead wire. Therefore, the second extending piece can be configured using the space above the second extending piece.

[0019] [Details of Embodiments of the Present Disclosure] A specific example of the battery wiring module of the present disclosure will be described below with reference to the drawings. In each drawing, for convenience of explanation, a part of the configuration may be exaggerated or simplified. Also, the dimensional ratios of each part may be different in each drawing. Note that, as used in this specification, "opposite" means that surfaces or members are positioned directly in front of each other, and includes not only the case where they are completely directly in front of each other, but also the case where they are partially directly in front of each other. Also, as used in this specification, "opposite" includes both the case where another member is interposed between two parts and the case where nothing is interposed between the two parts.

[0020] As shown in FIG. 1, the battery wiring module 10 of the present embodiment is, for example, attached to a battery 11 mounted in an electric vehicle, a hybrid vehicle, or the like. The battery 11 is, for example, a secondary battery. The battery 11 supplies electric power to a vehicle driving motor (not shown). Also, the battery 11 receives electric power from the driving motor or the power generation motor according to the charge state and the vehicle operation state.

[0021] The battery 11 includes a plurality of battery cells 12. The battery 11 has, for example, a substantially rectangular parallelepiped shape by arranging a plurality of battery cells 12 side by side in one direction. In the following description, the direction in which the battery cells 12 are arranged is referred to as the X direction, the direction orthogonal to the X direction is referred to as the Y direction. Also, the Z direction orthogonal to the X and Y directions is the vertical direction, and the side to which the battery wiring module 10 is attached to the battery 11 is the upper side. That is, the battery 11 has a module mounting surface 13 to which the battery wiring module 10 is attached on the upper side surface. Note that, for convenience of explanation, the Z direction is the vertical direction, but this does not necessarily mean that the Z direction of the battery wiring module 10 is arranged in the vertical direction.

[0022] Each battery cell 12 has two battery terminals 14. The two battery terminals 14 are a positive electrode side terminal and a negative electrode side terminal, respectively. When the battery cells 12 are arranged in the X direction, the two battery terminals 14 are arranged along the Y direction on the upper surface of the battery cell 12.

[0023] (Configuration of battery wiring module 10) The battery wiring module 10 comprises a plurality of wires 21 electrically connected to a battery 11, and a case 22 housing each wire 21. The battery wiring module 10 also comprises a plurality of busbars 23 supported by the case 22, for example. Each busbar 23 is arranged in a row along the X direction on both sides of the case 22 in the Y direction. Each busbar 23 connects adjacent battery terminals 14 in the X direction. The busbars 23 are connected to the battery terminals 14, for example, by welding. Each busbar 23 is electrically connected to its corresponding wire 21. The busbars 23 together with the wires 21 form a conductive path. The wires 21 are, for example, voltage-sensing wires for detecting the voltage of the busbars 23. Each wire 21 is connected to a connector 24 for connecting to a voltage-sensing device (not shown). The battery wiring module 10 also comprises a cover 25 covering the top of the case 22.

[0024] (Configuration of Case 22) Case 22 is formed of an insulator such as synthetic resin. Case 22 has a first busbar holding portion 26 and a second busbar holding portion 27. The first busbar holding portion 26 and the second busbar holding portion 27 have different shapes. Multiple first busbar holding portions 26 and second busbar holding portions 27 are arranged alternately in the X direction. There are two rows of first busbar holding portions 26 and second busbar holding portions 27, each corresponding to two rows of busbars 23 arranged in the X direction. A pair of adjacent first busbar holding portions 26 and second busbar holding portions 27 in the X direction hold one busbar 23. Each busbar 23 is provided in a manner that spans across adjacent first busbar holding portions 26 and second busbar holding portions 27 in the X direction.

[0025] The case 22 has a sensor housing 30. The sensor housing 30 houses a temperature sensor 60 for detecting the temperature of the battery 11. Figures 2 and 3 show the vicinity of the sensor housing 30 in case 22. Case 22 has a wire housing 31 extending in the X direction. The wire housing 31 has a bottom wall 32 and a pair of side walls 33 and 34 facing each other in the Y direction. The lower surface of the bottom wall 32 faces the module mounting surface 13 in the Z direction. Each side wall 33 and 34 extends upward from the bottom wall 32. The electric wire 21 is housed between the pair of side walls 33 and 34 in the Y direction. Of the pair of side walls 33 and 34, the side wall located inward in the Y direction is designated as side wall 33, and the side wall located outward in the Y direction is designated as side wall 34. The first busbar holding portion 26 and the second busbar holding portion 27 are provided on the Y-outward side of the wire housing 31. The upper opening of the wire housing 31 is covered by the cover 25.

[0026] The sensor housing section 30 is formed to span across one first busbar holding section 26 and one second busbar holding section 27 that are adjacent to each other in the X direction. In the following description, the first busbar holding section 26 and the second busbar holding section 27 on which the sensor housing section 30 is formed will be referred to as the first busbar holding section 26a and the second busbar holding section 27a, respectively. Furthermore, the first busbar holding section 26 that is adjacent to the second busbar holding section 27a in the X direction and is located on the opposite side from the first busbar holding section 26a will be referred to as the first busbar holding section 26b. Furthermore, the second busbar holding section 27 that is adjacent to the first busbar holding section 26a in the X direction and is located on the opposite side from the second busbar holding section 27a will be referred to as the second busbar holding section 27b. Furthermore, as shown in Figure 3, the first busbar retaining parts 26 other than the first busbar retaining parts 26a and 26b are designated as the first busbar retaining part 26c. And the second busbar retaining parts 27 other than the second busbar retaining parts 27a and 27b are designated as the second busbar retaining part 27c.

[0027] As shown in Figure 3, the first busbar holding portions 26b, 26c and the second busbar holding portions 27b, 27c extend outward in the Y direction from the wire housing portion 31. The first busbar holding portion 26a and the second busbar holding portion 27a extend outward in the Y direction from the sensor housing portion 30. In the side wall 34 of the wire housing portion 31, a first opening 35 is provided at a position corresponding to the second busbar holding portions 27b, 27c. Also, in the side wall 34 of the wire housing portion 31, a second opening 36 is provided at a position corresponding to the second busbar holding portion 27a. The electric wire 21 is pulled out outward in the Y direction from inside the wire housing portion 31 through the first opening 35 or the second opening 36.

[0028] (Configuration of sensor housing 30) As shown in Figures 2 and 3, the case 22 has an opposing wall portion 37 that spans the first busbar holding portion 26a and the second busbar holding portion 27a. The opposing wall portion 37 is provided on the Y-outward side of the side wall 34 of the wire housing portion 31. The opposing wall portion 37 is, for example, parallel to the side wall 34. The opposing wall portion 37 is opposite to the side wall 34 in the Y-direction. The first busbar holding portion 26a extends outward in the Y-direction from the opposing wall portion 37.

[0029] The sensor housing section 30 is provided between the side wall 34 and the opposing wall section 37. The sensor housing section 30 is also provided between the first busbar holding section 26a and the wire housing section 31. The sensor housing section 30 has a spring support section 38. The spring support section 38 is formed to connect the side wall 34 and the opposing wall section 37.

[0030] As shown in Figure 4, the sensor housing 30 houses a temperature sensor 60 and a spring member 61. The spring member 61 is provided between the temperature sensor 60 and the spring member 61. The spring member 61 biases the temperature sensor 60 downward. The temperature sensor 60 is, for example, a thermistor. The temperature sensor 60 has a temperature detection surface 60a. The temperature detection surface 60a of the temperature sensor 60 is pressed against the upper surface 12a of the battery cell 12 by the biasing force of the spring member 61.

[0031] The temperature sensor 60 has lead wires 62 for signal transmission. For the sake of clarity, the lead wires 62 are not shown in Figures 2 and 3. The case 22 is provided with retaining claws 39 for holding the temperature sensor 60. The lead wires 62 are routed out from the temperature sensor 60, passing over the retaining claws 39. As shown in Figure 2, the retaining claws 39 are provided at the base end of the second busbar retaining portion 27a.

[0032] (Structure of the first extension piece 41) As shown in Figure 2, the case 22 has a first extension piece 41 and a second extension piece 51 on both sides of the sensor housing portion 30 in the X direction.

[0033] The first extension piece 41 is provided at the base end 28 of the first busbar holding portion 26b. As shown in Figure 4, the first extension piece 41 has a first portion 42, a folded portion 43, a second portion 44, and a first locking portion 45. The first portion 42 extends downward in the Z direction from the base end 28 of the first busbar holding portion 26b, which serves as the base. That is, the first portion 42 extends toward the battery 11. The second portion 44 is folded away from the first portion 42 and extends toward the battery 11. That is, the folded portion 43 is provided between the first portion 42 and the second portion 44. The second portion 44 extends upward in the Z direction from the folded portion 43. The first extension piece 41, with its first portion 42, folded portion 43, and second portion 44, has a roughly U-shaped folded form that is convex toward the battery 11. As a result, the first extension piece 41 is formed to be able to flex in the X direction.

[0034] The first locking portion 45 is provided on the second portion 44. In the X direction, the first locking portion 45 protrudes from the second portion 44 on the side opposite to the first portion 42. When the case 22 is mounted on the battery 11, the first locking portion 45 is locked to the first locked portion 71 provided on the battery 11. The first locked portion 71 is a part of the battery 11 that extends upward from the battery 11. For example, the first locking portion 45 is inserted into a locking hole 72 provided in the first locked portion 71. The first locking portion 45 is then designed to hook onto the locking hole 72 in the Z direction upward. As a result, the first extending piece 41 holds the case 22 so that it does not separate from the battery 11 in the Z direction.

[0035] As shown in Figure 4, the first extension piece 41 has a first bending point B1 set at the base end of the first portion 42 and a second bending point B2 set at the folded portion 43. The first bending point B1 is set at the base end of the first portion 42, that is, at the portion where the first portion 42 connects to the base end 28 of the first busbar holding portion 26b.

[0036] The first bending point B1 is located above the first locking portion 45 in the Z direction. The second bending point B2 is located below the first locking portion 45 in the Z direction. That is, the second bending point B2 is located on the battery 11 side relative to the first locking portion 45, while the first bending point B1 is located on the opposite side of the battery 11 relative to the first locking portion 45. More specifically, the first bending point B1 is located perpendicular to the Z direction and above a virtual plane P passing through the first locking portion 45, i.e., on the side opposite the battery from the virtual plane P. The second bending point B2 is located below the virtual plane P, i.e., on the side of the battery 11 from the virtual plane P.

[0037] The lead wire 62 of the temperature sensor 60 is drawn out from the temperature sensor 60 toward the first extension piece 41 in the X direction. The lead wire 62 passes above the retaining claw 39 and the first extension piece 41. That is, the lead wire 62 passes through the empty space above the first extension piece 41. The upper surface of the base end portion 28 of the first busbar retaining portion 26b and the upper end portion of the retaining claw 39 are set to the same position relative to each other in the Z direction. The upper end of the second portion 44 of the first extension piece 41 is located below the upper surface of the base end portion 28 and the upper end of the retaining claw 39.

[0038] (Structure of the second extension piece 51) As shown in Figure 2, the second extension piece 51 is provided at the base end of the second busbar holder 27b. The second extension piece 51 has, for example, a third portion 52, a fourth portion 53, and a second locking portion 54. The third portion 52 extends upward in the Z direction from the base end of the second busbar holder 27b. That is, the third portion 52 extends away from the battery 11. The fourth portion 53 is folded back in a substantially U shape from the upper end of the third portion 52 and extends downward in the Z direction. That is, the fourth portion 53 is folded back from the third portion 52 and extends toward the battery 11. The second extension piece 51 is formed to bend in the X direction due to the substantially U shape formed by the third portion 52 and the fourth portion 53. The case 22 also has, for example, a connecting wall 55 that connects the second extension piece 51 and the side wall 34.

[0039] The second locking portion 54 protrudes in the X direction from, for example, the lower end of the fourth portion 53. The second locking portion 54 protrudes from the fourth portion 53 on the side opposite to the third portion 52. When the case 22 is mounted on the battery 11, the second locking portion 54 is locked to the second locked portion 81 provided on the battery 11. The second locked portion 81 is a part of the battery 11 that extends upward from the battery 11. For example, the second locking portion 54 is inserted into a locking hole 82 provided in the second locked portion 81. The second locking portion 54 is then designed to hook onto the locking hole 82 in the Z direction upward. As a result, the second extending piece 51 holds the case 22 so that it does not separate from the battery 11 in the Z direction.

[0040] Next, we will explain the deflection of the first extension piece 41 when the case 22 is assembled to the battery 11. As shown in Figure 5, the case 22 including the first extension piece 41 is assembled to the battery 11 in the assembly direction D along the Z direction. In Figure 5, the first extension piece 41 in an unbent state is shown by a dashed line, and the first extension piece 41 in a bent state after contacting the first locking portion 71 is shown by a solid line. When the first locking portion 45 contacts the tip of the first locking portion 71 along the assembly direction D, the first extension piece 41 bends around the first bending point B1 and the second bending point B2, respectively. Here, as mentioned above, the second bending point B2 is located on the battery 11 side relative to the first locking portion 45, and the first bending point B1 is located on the opposite side of the battery 11 relative to the first locking portion 45. Therefore, as shown by the arrows in Figure 5, the rotational direction of the bend around the first bending point B1 and the rotational direction of the bend around the second bending point B2 are opposite to each other. In the side view shown in Figure 5, the first portion 42 bends clockwise around the first bending point B1, and the second portion 44 bends counterclockwise around the second bending point B2. As the first portion 42 bends clockwise around the first bending point B1, the first locking portion 45 is displaced slightly downward when pushed by the first locked portion 71. This makes it easier for the first locking portion 45 to fit into the locking hole 72 of the first locked portion 71.

[0041] The operation of this embodiment will now be described. When the case 22 is assembled to the battery 11, a force is applied to the spring support portion 38 of the sensor housing 30 from the spring member 61 that biases the temperature sensor 60, pushing the spring support portion 38 upward. Here, the first extension piece 41 and the second extension piece 51 located on both sides of the sensor housing 30 in the X direction are locked to the first locking portion 71 and the second locking portion 81, respectively. That is, the force of the spring member 61 that pushes up the spring support portion 38 can be received by the first extension piece 41 and the second extension piece 51. Therefore, it is possible to suppress the sensor housing 30 from lifting away from the battery 11 due to the force of the spring member 61.

[0042] The effects of this embodiment will now be explained. (1) The first extension piece 41 has a first portion 42 that extends toward the battery 11, a second portion 44 that is folded back from the first portion 42 and extends away from the battery 11, and a first locking portion 45 provided on the second portion 44 that locks onto the first locking portion 71. With this configuration, the case 22 can be held in place by the first extension piece 41 that locks onto the first locking portion 71 of the battery 11, preventing it from separating from the battery 11. This makes it possible to suppress the case 22 from floating up. In addition, the first extension piece 41 is flexible due to the folded shape formed by the first portion 42 and the second portion 44. This makes it possible to easily lock the first locking portion 45 provided on the second portion 44 onto the first locking portion 71. Furthermore, the first portion 42 and the second portion 44 form a folded shape that is convex toward the battery 11. This makes it possible to secure space on the opposite side of the battery 11 from the first extension piece 41.

[0043] (2) The first extension piece 41 has a first bending point B1 set at the base end of the first portion 42 and a second bending point B2 set at the folded portion 43 between the first portion 42 and the second portion 44. With this configuration, the first extension piece 41 can be made more flexible by the first bending point B1 and the second bending point B2. This makes it possible to more easily lock the first locking portion 45 provided on the second portion 44 to the first locking portion 71.

[0044] (3) When the battery 11 side of the first extension piece 41 is considered the lower side and the opposite side is considered the upper side, the first bending point B1 is located above the first locking portion 45. The second bending point B2 is located below the first locking portion 45. With this configuration, when the case 22 is assembled to the battery 11, the second portion 44 bends in a direction toward the first portion 42 with respect to the second bending point B2. The first portion 42 bends in a direction toward away from the first locking portion 71 with respect to the first bending point B1. As a result, the first locking portion 45 is displaced downward, i.e., toward the battery 11, when it engages with the first locking portion 71. Therefore, the first locking portion 45 can easily enter the locking hole 72 of the first locking portion 71. Therefore, by arranging the positional relationship between the first locking portion 45, the first bending point B1, and the second bending point B2 as described above, it becomes possible to suitably lock the first locking portion 45 to the first locked portion 71.

[0045] (4) The case 22 has a sensor housing 30 that houses a temperature sensor 60 for detecting the temperature of the battery 11. The temperature sensor 60 has lead wires 62. The lead wires 62 pass over the first extension piece 41. With this configuration, the lead wires 62 of the temperature sensor 60 pass over the space above the first extension piece 41, making it possible to make effective use of that space.

[0046] (5) The case 22 has a second extension piece 51 that is locked to a second locking portion 81 provided on the battery 11. The sensor housing portion 30 is provided between the first extension piece 41 and the second extension piece 51. With this configuration, the first extension piece 41 and the second extension piece 51 make it possible to hold the case 22 so that it does not separate from the battery 11 on both sides of the sensor housing portion 30. This makes it possible to more effectively suppress the lifting of the portion of the case 22 that includes the sensor housing portion 30.

[0047] (6) The second extension piece 51 has a third portion 52 that extends away from the battery 11 and a fourth portion 53 that is folded back from the third portion 52 and extends toward the battery 11. The second extension piece 51 also has a second locking portion 54 provided on the fourth portion 53 that locks with the second locking portion 81. With this configuration, the second extension piece 51 can bend due to the folded shape formed by the third portion 52 and the fourth portion 53, so that the second locking portion 54 provided on the fourth portion 53 can be easily locked with the second locking portion 81. Note that the lead wires 62 of the temperature sensor 60 pass above the first extension piece 41, so even if space is not secured above the second extension piece 51, it does not affect the arrangement of the lead wires 62. For this reason, the second extension piece 51 can be constructed using the empty space above.

[0048] (Example of change) This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0049] In the above embodiment, the second extension piece 51 may have the same configuration as the first extension piece 41. In the first extension piece 41 of the above embodiment, the base end of the first portion 42 and the first bending point B1 may be set below the virtual plane P. That is, the base end of the first portion 42 and the first bending point B1 may be set below the first locking portion 45.

[0050] The relationship between the protrusions and recesses in the locking structure between the first extension piece 41 and the first locking portion 71 may be reversed from that of the above embodiment. That is, the first locking portion 71 may be provided with a protrusion, and a recess into which the protrusion fits and locks may be provided as the first locking portion in the second portion 44. Similarly, the second locking portion 81 may be provided with a protrusion, and a recess into which the protrusion fits and locks may be provided as the second locking portion in the fourth portion 53.

[0051] In the above embodiment, the first extension piece 41 and the second extension piece 51 are provided on both sides of the sensor housing 30 in the X direction, but in addition, for example, the first extension piece 41 and the second extension piece 51 may be provided on both sides of the sensor housing 30 in the Y direction.

[0052] In the above embodiment, the second extension piece 51 may be omitted. • In the above embodiment, the sensor housing 30 is provided spanning the first busbar holding portion 26a and the second busbar holding portion 27a, but the position of the sensor housing 30 in the case 22 is not particularly limited to the above embodiment.

[0053] The embodiments and modifications disclosed herein are illustrative in all respects, and the present invention is not limited to these examples. That is, the scope of the present invention is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0054] 10 Battery Wiring Modules 11 Batteries 12 battery cells 12a Top side 13 Module mounting surface 14 Battery terminal 21 Electric wire 22 cases 23 Busba 24 connectors 25 Cover 26 (26a, 26b, 26c) First busbar retaining part (busbar retaining part) 27 (27a, 27b, 27c) Second busbar retaining part (busbar retaining part) 28 Proximal end 30 Sensor housing 31 Wire housing section 32 Bottom wall 33,34 side wall 35 First opening 36. Second opening 37 Opposing wall section 38 Spring support section 39 Holding claw 41 1st extension piece (extension piece) 42 Part 1 43 Folded section 44 Part 2 45 First locking part (locking part) 51 2nd extension piece 52 Part 3 53 Part 4 54 Second locking section 55 Connecting wall 60 Temperature Sensors 60a Temperature detection surface 61 Spring member 62 Lead wires 71 First locked part (locked part) 72 Locking holes 81 Second locked part 82 Locking hole B1 First bending point B2 Second bending point D Assembly direction P Virtual Plane

Claims

1. A battery wiring module that is attached to a battery, A wire electrically connected to the aforementioned battery, The system comprises a case for housing the aforementioned electric wires, The case has an extension that engages with a locking portion provided on the battery, The extension piece has a first portion extending away from the battery, a second portion folded back from the first portion and extending toward the battery, and a locking portion provided on the second portion that locks into the locking portion. Battery wiring module.

2. The extension has a first bending point set at the base end of the first portion and a second bending point set at the folded portion between the first portion and the second portion. The battery wiring module according to claim 1.

3. When the battery side of the extension piece is considered the lower side and the opposite side is considered the upper side, The first bending point is located below the locking portion, The second bending point is located above the locking portion. The battery wiring module according to claim 2.

4. The case has a sensor housing section for housing a temperature sensor for detecting the temperature of the battery, The temperature sensor has lead wires, When the battery side of the extension piece is considered the lower side and the opposite side is considered the upper side, the lead wire passes over the upper side of the extension piece. The battery wiring module according to claim 1.

5. The extension piece is designated as the first extension piece, and the locking portion is designated as the first locking portion. The case has a second extension that is locked to a second locking portion provided on the battery, The sensor housing portion is provided between the first extension piece and the second extension piece. The battery wiring module according to claim 4.

6. The locking portion of the first extension is designated as the first locking portion. The second extension piece has a third portion extending toward the battery, a fourth portion that is folded back from the third portion and extends away from the battery, and a second locking portion provided on the fourth portion that locks into the second locking portion. The battery wiring module according to claim 5.

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