Battery Wiring Module

Abstract

To provide a battery wiring module capable of stably holding an electric wire bundle.SOLUTION: An electric wire housing part 31 of a case 22 includes an electric wire conductive part 32 conducting an electric wire bundle W to an external part of the electric wire housing part 31. The electric wire bundle W includes a bent part Wa. The electric wire conductive part 32 includes: a contact part 41 that is contacted to the bent part Wa; and a fastening fixing part 51 that fastens and fixes the bent part Wa to the contact part 41. Then, the contact part 41 has a shape matched to a shape of the bent part Wa.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] For example, as disclosed in Patent Document 1, a battery wiring module is attached to a high-voltage battery installed as a power source for driving vehicles such as electric vehicles and hybrid vehicles. The battery wiring module includes a plurality of electric wires electrically connected to the battery and a case having an electric wire housing portion that houses the plurality of electric wires. The electric wire housing portion has an electric wire lead-out portion that leads out an electric wire bundle formed by bundling the plurality of electric wires to the outside of the electric wire housing portion. In the electric wire lead-out portion, the electric wire bundle may be fastened and fixed with a tightening band or the like. In this case, the electric wire lead-out portion has an abutment portion against which the electric wire bundle is pressed by the tightening band or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-190156 Summary of the Invention [Problem to be solved by the invention]

[0004] When the wire bundle is bent and arranged in the wire guide portion, a gap may occur between the wire bundle and the abutting portion of the wire guide portion. If a gap occurs between the wire bundle and the abutting portion, the wire bundle has a large amount of play, which reduces the stability of the fastening of the wire bundle by the fastening portion.

[0005] An object of the present disclosure is to provide a battery wiring module that can stably hold a bundle of electric wires. [Means for solving the problem]

[0006] The battery wiring module of the present disclosure is a battery wiring module that is attached to a battery, and includes a plurality of electric wires that are electrically connected to the battery, and a case having an electric wire accommodating section that accommodates the plurality of electric wires, wherein the electric wire accommodating section has an electric wire lead-out section that leads an electric wire bundle formed by bundling the plurality of electric wires to the outside of the electric wire accommodating section, the electric wire bundle having a bent section, and the electric wire lead-out section has an abutment section that abuts against the bent section and a fastening and fixing section that fastens and fixes the bent section to the abutment section, and the abutment section has a shape that matches the shape of the bent section. [Effects of the Invention]

[0007] The battery wiring module of the present disclosure exhibits the effect of stably holding a bundle of electric wires. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic plan view of a battery wiring module according to an embodiment. [Figure 2] FIG. 2 is a plan view showing a part of the case of the battery wiring module of the same configuration. [Figure 3] FIG. 3 is a perspective view showing a part of the case of the battery wiring module of the same configuration. [Figure 4] FIG. 4 is a plan view showing a part of the case of the battery wiring module according to the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The battery wiring module of the present disclosure includes: [1] A battery wiring module to be attached to a battery, comprising: a plurality of electric wires electrically connected to the battery; and a case having an electric wire accommodating section that accommodates the plurality of electric wires, wherein the electric wire accommodating section has an electric wire lead-out section that leads out a wire bundle formed by bundling the plurality of electric wires to the outside of the electric wire accommodating section, the electric wire bundle having a bent section, and the electric wire lead-out section having an abutment section that abuts against the bent section and a fastening and fixing section that fastens and fixes the bent section to the abutment section, and the abutment section has a shape that matches the shape of the bent section.

[0010] According to this configuration, the abutment portion against which the bent portion of the electric wire bundle is pressed by the fastening portion has a shape that matches the shape of the bent portion. This makes it possible to prevent the formation of a gap between the abutment portion and the bent portion. This reduces play in the bent portion of the electric wire bundle, and as a result, the abutment portion and the fastening portion can stably hold the electric wire bundle.

[0011] [2] In the above [1], the abutting portion may have a first rib and a second rib arranged side by side along the extending direction of the electric wire bundle, and the bent portion may abut against each of the tip end of the first rib and the tip end of the second rib.

[0012] With this configuration, the bent portion of the wire bundle is pressed against the tip portions of the first rib and the second rib by the fastening portion, so that the bent portion can be stably held at at least two points by the tip portions of the first rib and the second rib.

[0013] [3] In the above [2], the fastening portion may be configured to be located midway between the first rib and the second rib. According to this configuration, the fastening force of the fastening fixing portion applied to the bent portion of the wire bundle can be distributed in a well-balanced manner to each of the first rib and the second rib.

[0014] [4] In the above [2] or [3], the lengths of the first rib and the second rib from their respective base ends to their respective tip ends may be set to lengths that match the shape of the curved portion.

[0015] According to this configuration, the tip end portions of the first rib and the second rib can be brought into contact with the bent portion of the wire bundle. [5] In the above [4], the length of the first rib and the length of the second rib may be set to different lengths.

[0016] According to this configuration, the tip end portions of the first rib and the second rib can be brought into contact with the bent portion of the wire bundle. [6] In the above [5], the first rib may be provided closer to the outside of the case than the second rib, and the length of the second rib may be longer than the length of the first rib.

[0017] According to this configuration, it is possible to make the tip portions of the first rib and the second rib suitably abut against the bent portion of the wire bundle. [Details of the embodiments of the present disclosure] Specific examples of the battery wiring module of the present disclosure will be described below with reference to the drawings. In each drawing, for the sake of convenience, some components may be exaggerated or simplified. Furthermore, the dimensional proportions of each part may differ from one drawing to another.

[0018] As shown in Fig. 1, a battery wiring module 10 of this embodiment is attached to a battery 11 installed in, for example, an electric vehicle or a hybrid vehicle. The battery 11 is, for example, a secondary battery. The battery 11 supplies power to a traction motor of the vehicle (not shown). The battery 11 also receives power from the traction motor or the power generation motor depending on the state of charge and the operating state of the vehicle.

[0019] The battery 11 includes a plurality of battery cells 12. The battery 11 has, for example, a substantially rectangular parallelepiped shape with the plurality of battery cells 12 arranged in one direction. In the following description, the direction in which the battery cells 12 are arranged is referred to as the X direction, and the direction perpendicular to the X direction is referred to as the Y direction. The Z direction perpendicular to the X and Y directions is referred to as the up-down direction, and the side of the battery 11 on which the battery wiring module 10 is attached is referred to as the upper side. That is, the battery 11 has a module attachment surface 13 on which the battery wiring module 10 is attached on the upper side surface.

[0020] Each battery cell 12 has two battery terminals 14. One of the two battery terminals 14 is a positive terminal and the other is a negative terminal. When the battery cells 12 are aligned in the X direction, the two battery terminals 14 are aligned along the Y direction on the top surface of the battery cell 12.

[0021] (Configuration of battery wiring module 10) The battery wiring module 10 includes a plurality of electric wires 21 electrically connected to the batteries 11 and a case 22 that houses the electric wires 21. The battery wiring module 10 also includes, for example, a plurality of bus bars 23 supported by the case 22. The bus bars 23 are arranged, for example, on both sides of the case 22 in the Y direction, side by side in the X direction. Each bus bar 23 connects battery terminals 14 adjacent to each other in the X direction. The bus bars 23 are connected to the battery terminals 14 by, for example, welding. Each bus bar 23 is electrically connected to a corresponding electric wire 21. Each electric wire 21 is, for example, a voltage detection wire for detecting the voltage of each bus bar 23. Each electric wire 21 is connected to a connector 24 for connection to a voltage detection device (not shown). The battery wiring module 10 also includes a cover 25 that covers the upper part of the case 22.

[0022] (Configuration of Case 22) The case 22 is formed of an insulating material such as synthetic resin. The case 22 includes a wire housing 31 that houses the electric wires 21. The wire housing 31 extends along the X direction. A pair of the wire housings 31 are provided so as to be aligned in the Y direction. The pair of wire housings 31 join at one end in the X direction, and a wire lead-out portion 32 is provided at the joined portion. That is, the wire housing 31 has the wire lead-out portion 32 at an end in the length direction of the wire housing 31. The wire lead-out portion 32 is formed at one end of the case 22 in the X direction. The plurality of electric wires 21 are collectively led out of the case 22 from the wire lead-out portion 32.

[0023] The case 22 has bus bar holding portions 33 that hold the bus bars 23. A plurality of the bus bar holding portions 33 are arranged side by side in the X direction. The bus bar holding portions 33 extend outward in the Y direction from each of the pair of electric wire accommodating portions 31. Two rows of the bus bar holding portions 33 arranged side by side in the X direction are provided, one for each pair of electric wire accommodating portions 31. In this embodiment, one bus bar 23 is held by two bus bar holding portions 33 adjacent to each other in the X direction.

[0024] One end of each electric wire 21 is led out from the electric wire accommodating portion 31 to the bus bar holding portion 33 side and connected to the corresponding bus bar 23. The other end of each electric wire 21 is led out from the electric wire leading-out portion 32 to the outside of the case 22 and connected to the connector 24.

[0025] (Configuration of bent portion Wa of wire bundle W) 2 and 3, the plurality of electric wires 21 are bound together by, for example, an adhesive tape (not shown) wound around the outer periphery at the portion passing through the inside of the electric wire guide portion 32 to form an electric wire bundle W (see FIG. 2). The electric wire bundle W has a bent portion Wa inside the electric wire guide portion 32. The bent portion Wa is bent so as to curve along a plane perpendicular to the Z direction, i.e., along the XY plane.

[0026] 3, the case 22 has a protective wall 34 at the end on the side where the wire guide portion 32 is provided in the X direction. The protective wall 34 is provided in the center in the Y direction. The protective wall 34 surrounds, for example, components (not shown) that are attached to the battery 11.

[0027] The wire guide portion 32 is arranged in parallel with the protective wall portion 34 in the Y direction. In the case 22 of this embodiment, the protective wall portion 34 is located in the center in the Y direction, and therefore the wire guide portion 32 is provided at a position offset in the Y direction with respect to the wire accommodating portion 31. For this reason, in the wire guide portion 32, the wire bundle W cannot be drawn out linearly along the X direction. In other words, the wire bundle W is bent to avoid the protective wall portion 34.

[0028] The bent portion Wa of the electric wire bundle W is a portion bent just before emerging from the electric wire lead-out portion 32 to the outside of the case 22. By being bent at the bent portion Wa, the electric wire bundle W is drawn out along the X direction at the portion emerging from the electric wire lead-out portion 32 to the outside of the case 22.

[0029] (Configuration of the wire guide portion 32) As shown in FIG. 2 , the wire guide portion 32 has a contact portion 41 and a fastening portion 51. The contact portion 41 contacts the outer peripheral surface of the bent portion Wa. The fastening portion 51 fastens the bent portion Wa to the contact portion 41. The fastening portion 51 is, for example, a fastening band. The fastening portion 51 is, for example, a separate body from the case 22.

[0030] (Configuration of contact portion 41) 2 and 3, the abutment portion 41 has a shape that matches the shape of the bent portion Wa. The abutment portion 41 abuts, for example, against the outer bend portion of the bent portion Wa. The outer bend portion of the bent portion Wa is the convex side of the bent portion Wa when viewed from the Z direction. The abutment portion 41 has a base portion 42, a first rib 43, and a second rib 44. The first rib 43 and the second rib 44 each protrude from the base portion 42 toward the inside of the wire guide portion 32.

[0031] The first rib 43 and the second rib 44 are arranged side by side in the direction in which the electric wire bundle W extends. The first rib 43 and the second rib 44 are, for example, ribs that extend parallel to each other. The first rib 43 is provided on the outer side of the case 22 with respect to the second rib 44. The first rib 43 is provided, for example, at a position that coincides with the outer surface 32a of the electric wire guide portion 32 in the X direction. The second rib 44 is located on the inner side of the electric wire guide portion 32 with respect to the first rib 43.

[0032] 2, the first rib 43 has a base end 43a and a tip end 43b. The base end 43a of the first rib 43 is connected to the base 42. The second rib 44 has a base end 44a and a tip end 44b. The base end 44a of the second rib 44 is connected to the base 42.

[0033] The length L1 of the first rib 43 is from the base end 43a to the tip end 43b. The length L2 of the second rib 44 is from the base end 44a to the tip end 44b. The length L1 of the first rib 43 and the length L2 of the second rib 44 are set to be different lengths so as to fit the shape of the bent portion Wa of the electric wire bundle W. In this embodiment, the length L2 of the second rib 44 is set longer than the length L1 of the first rib 43 so as to fit the shape of the bent portion Wa. As a result, the tip ends 43b, 44b of the first rib 43 and the second rib 44 abut against the outer peripheral surface of the bent portion Wa.

[0034] As shown in FIGS. 2 and 3 , the first rib 43 includes a first portion 45 that protrudes from the base portion 42 in the Y direction and a second portion 46 that protrudes in the Z direction. The second rib 44 includes a third portion 47 that protrudes from the base portion 42 in the Y direction and a fourth portion 48 that protrudes in the Z direction. The length L2 of the second rib 44 gradually decreases from the third portion 47 to the fourth portion 48. Meanwhile, the length L1 of the first rib 43 is uniform from the first portion 45 to the second portion 46. In the first rib 43, a tip portion 43b extending from the first portion 45 to the second portion 46 is arc-shaped when viewed from the X direction. In the second rib 44, a tip portion 44b extending from the third portion 47 to the fourth portion 48 is arc-shaped when viewed from the X direction.

[0035] The wire guide portion 32 has a first through hole 32b and a second through hole 32c. The first through hole 32b and the second through hole 32c each pass through the wire guide portion 32 in the Z direction. The abutment portion 41 is located between the first through hole 32b and the second through hole 32c in the Y direction.

[0036] As shown in FIG. 2, the fastening portion 51 passes through the first through-hole 32b and the second through-hole 32c, and also passes around the outer periphery of the bent portion Wa of the electric wire bundle W. The tip of the fastening portion 51 is inserted into and locked by a locking portion (not shown) provided at the base end of the fastening portion 51. As a result, the fastening portion 51 fastens the bent portion Wa against the abutment portion 41. That is, the fastening portion 51 presses the bent portion Wa against the tip ends 43b, 44b of the first rib 43 and the second rib 44. As a result, the tip ends 43b, 44b of the first rib 43 and the second rib 44 are in close contact with the outer periphery of the bent portion Wa.

[0037] The fastening portion 51 is located between the first rib 43 and the second rib 44 when viewed from a direction perpendicular to the extension direction of the wire bundle W (for example, the Z direction). In other words, when viewed from the Z direction, the first rib 43 and the second rib 44 are provided on both sides of the fastening portion 51. This makes it possible to distribute the fastening force of the fastening portion 51 to the first rib 43 and the second rib 44 in a balanced manner.

[0038] The effects of this embodiment will be described. (1) The wire guide portion 32 has an abutting portion 41 that abuts against the bent portion Wa and a fastening portion 51 that fastens and fixes the bent portion Wa to the abutting portion 41. The abutting portion 41 has a shape that matches the shape of the bent portion Wa. With this configuration, the abutting portion 41, against which the fastening portion 51 presses the bent portion Wa of the wire bundle W, has a shape that matches the shape of the bent portion Wa. This makes it possible to prevent a gap from being formed between the abutting portion 41 and the bent portion Wa. This reduces play at the bent portion Wa of the wire bundle W, and as a result, the abutting portion 41 and the fastening portion 51 can stably hold the wire bundle W.

[0039] (2) The abutting portion 41 has a first rib 43 and a second rib 44 arranged side by side along the extension direction of the electric wire bundle W. The bent portion Wa abuts against each of the tip end 43b of the first rib 43 and the tip end 44b of the second rib 44. According to this configuration, the bent portion Wa of the electric wire bundle W is pressed against the tip end 43b, 44b of each of the first rib 43 and the second rib 44 by the fastening fixing portion 51. Therefore, the tip end 43b, 44b of each of the first rib 43 and the second rib 44 can stably hold the bent portion Wa at at least two points.

[0040] (3) The fastening portion 51 is located midway between the first rib 43 and the second rib 44. This configuration allows the fastening force of the fastening portion 51 applied to the bent portion Wa of the electric wire bundle W to be distributed to each of the first rib 43 and the second rib 44 in a well-balanced manner.

[0041] (4) The length L1 of the first rib 43 and the length L2 of the second rib 44 are set to lengths that match the shape of the bent portion Wa. This configuration allows the tip portions 43b, 44b of the first rib 43 and the second rib 44 to abut against the bent portion Wa of the electric wire bundle W.

[0042] (5) The length L1 from the base end 43a to the tip end 43b of the first rib 43 and the length L2 from the base end 44a to the tip end 44b of the second rib 44 are set to be different from each other. With this configuration, the tip ends 43b, 44b of the first rib 43 and the second rib 44 can be brought into contact with the bent portion Wa of the electric wire bundle W.

[0043] (6) The first rib 43 is located closer to the outside of the case 22 than the second rib 44. The length L2 of the second rib 44 is longer than the length L1 of the first rib 43. If the length L2 of the second rib 44 were equal to or shorter than the length L1 of the first rib 43, the third portion 47 of the second rib 44 would be separated from the bending portion Wa. In this regard, in the present embodiment, the length L2 of the second rib 44 is set longer than the length L1 of the first rib 43, so that the third portion 47 of the second rib 44 can be brought into close contact with the outer peripheral surface of the bending portion Wa. Therefore, the first rib 43, the second rib 44, and the fastening portion 51 can suitably hold the wire bundle W.

[0044] (Example of change) This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0045] In the above embodiment, the distal ends 43b, 44b of the first rib 43 and the second rib 44 included in the contact portion 41 contact the bent portion Wa of the electric wire bundle W, but this is not particularly limited. For example, as shown in FIG. 4 , the contact portion 41 may have a single contact surface 61 having a shape that matches the shape of the bent portion Wa. With this configuration, the bent portion Wa of the electric wire bundle W is pressed by the fastening portion 51 against the contact surface 61 having a shape that matches the shape of the bent portion Wa. This makes it possible to prevent a gap from forming between the contact surface 61 and the bent portion Wa. This reduces play at the bent portion Wa, and as a result, the contact surface 61 and the fastening portion 51 can stably hold the electric wire bundle W.

[0046] The fastening portion 51 may be formed integrally with the case 22. The first rib 43 may be provided on the inner side of the outer surface 32 a of the wire guide portion 32 .

[0047] In the contact portion 41 of the above embodiment, the ribs that contact the bent portion Wa are two, the first rib 43 and the second rib 44, but this is not limitative and the number may be one or three or more. The abutting portion 41 may be configured to abut against an inner portion of the bend Wa. The inner portion of the bend Wa refers to the concave side of the bend Wa when viewed from the Z direction. When the abutting portion 41 is configured to abut against an inner portion of the bend Wa, the length L1 of the first rib 43 may be longer than the length L2 of the second rib 44. This allows the tip ends 43b, 44b of the first rib 43 and the second rib 44 to be in close contact with the outer peripheral surface of the bend Wa of the electric wire bundle W.

[0048] 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 defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0049] 10 Battery wiring module 11 Batteries 12 battery cells 13 Module mounting surface 14 Battery terminal 21 Electric wire 22 cases 23 Bus Bar 24 connectors 25 Cover 31 Wire housing 32 Wire lead-out section 32a External surface 32b 1st through hole 32c 2nd through hole 33 Bus bar holding part 34 Protective wall section 41 Contact part 42 Base 43 First Rib 43a Proximal end 43b Tip 44 Second Rib 44a Proximal end 44b Tip 45 Part 1 46 Part 2 47 Part 3 48 Part 4 51 Fastening fixing part 61 Contact surface L1 Length of the first rib L2 Length of the second rib W Wire bundle Wa Bent section

Claims

1. A battery wiring module to be attached to a battery, a plurality of electric wires electrically connected to the battery; a case having an electric wire housing portion that houses the plurality of electric wires, the electric wire accommodating section has an electric wire leading-out section that leads out the electric wire bundle formed by bundling the plurality of electric wires to the outside of the electric wire accommodating section, The wire bundle has a bent portion, the wire guide portion has a contact portion that contacts the bent portion and a fastening portion that fastens the bent portion to the contact portion, the abutment portion has a shape that matches the shape of the bent portion, the abutting portion has a first rib and a second rib arranged side by side along an extending direction of the electric wire bundle, the bent portion abuts against each of a tip end portion of the first rib and a tip end portion of the second rib, The first rib and the second rib each have a length from a base end to a tip end that is set to a length that matches the shape of the bent portion, The length of the first rib and the length of the second rib are set to be different from each other. Battery wiring module.

2. The fastening portion is located midway between the first rib and the second rib. The battery wiring module according to claim 1 .

3. the first rib is provided closer to the outer side of the case than the second rib, The length of the second rib is longer than the length of the first rib. The battery wiring module according to claim 1 .

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