Battery Wiring Module

Abstract

To provide a battery wiring module that can suppress floating of a case.SOLUTION: A case 22 has: a sensor housing part 30 that houses a temperature sensor 60 for detecting a temperature of a battery; a first locking part 41; and a second locking part 51. The first locking part 41 is locked with a first locked part 71 provided on the battery. The second locking part 51 is locked with a second locked part 81 provided on the battery.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 in vehicles such as electric vehicles and hybrid vehicles as a power source for driving the vehicle. The battery wiring module includes electric wires that are electrically connected to the battery and a case that houses the electric wires. The case also houses a temperature sensor that detects the battery temperature. The temperature sensor is pressed against the battery by a biasing member such as a spring. This allows for highly accurate battery temperature detection. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-89912 Summary of the Invention [Problem to be solved by the invention]

[0004] When the battery wiring module is attached to the battery, if the force exerted by the biasing portion pressing against the temperature sensor is used as a pressing force, there is a risk that the case will separate from the battery, i.e., the battery will lift up, due to the reaction force of that pressing force.

[0005] An object of the present disclosure is to provide a battery wiring module that can prevent the case from floating up. [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 an electric wire that is electrically connected to the battery, and a case that houses the electric wire, and the case has a sensor accommodating section that houses a temperature sensor for detecting the temperature of the battery, and a locking section that locks onto a locking section provided on the battery. [Effects of the Invention]

[0007] The battery wiring module of the present disclosure exhibits the effect of suppressing the case from floating up. [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 perspective view showing a part of the case of the battery wiring module of the same configuration. [Figure 3] FIG. 3 is a plan view showing a part of the case of the battery wiring module of the same configuration. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 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: an electric wire electrically connected to the battery; and a case for accommodating the electric wire; the case having a sensor accommodating section for accommodating a temperature sensor for detecting the temperature of the battery; and a locking section that locks onto a locking section provided on the battery.

[0010] According to this configuration, the locking portion that locks onto the locked portion of the battery can hold the case so that it does not come off the battery, thereby making it possible to prevent the case from floating up.

[0011] [2] In the above item [1], a plurality of the locking portions may be provided, and a plurality of the locked portions may be provided corresponding to the plurality of locking portions, respectively. According to this configuration, the plurality of locking portions can firmly hold the case so that it does not come off the battery.

[0012] [3] In the above [2], the plurality of locking portions may include a first locking portion and a second locking portion, the plurality of locked portions may include a first locked portion to which the first locking portion is locked and a second locked portion to which the second locking portion is locked, and the sensor accommodating portion may be provided between the first locking portion and the second locking portion.

[0013] With this configuration, the first and second locking portions can hold the case against the battery on both sides of the sensor housing portion, thereby more effectively preventing the portion of the case including the sensor housing portion from lifting up.

[0014] [4] In the above [3], the battery may include a plurality of battery cells arranged side by side in one direction, and the sensor accommodating portion, the first locking portion, and the second locking portion may be aligned in the direction in which the plurality of battery cells are arranged side by side.

[0015] This configuration makes it possible to provide the first and second locking portions on both sides of the sensor housing in the direction in which the battery cells are arranged, thereby making it possible to effectively prevent the case from lifting up by the first and second locking portions.

[0016] [5] In the above [4], the case may have a plurality of busbar holding portions that hold busbars that form a conductive path together with the electric wires, the plurality of busbar holding portions being arranged in a row along the arrangement direction of the plurality of battery cells, the sensor accommodating portion being provided across a pair of adjacent busbar holding portions among the plurality of busbar holding portions, and the first locking portion and the second locking portion being provided on busbar holding portions among the plurality of busbar holding portions that are different from the pair of busbar holding portions that the sensor accommodating portion straddles, and that are located adjacent to each of the pair of busbar holding portions.

[0017] This configuration allows the first and second locking portions to be provided closer to each other on either side of the sensor housing portion, thereby effectively preventing the case from lifting up.

[0018] [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 ease of explanation, some of the configuration may be exaggerated or simplified. The dimensional ratios of each part may differ between drawings. In this specification, "facing" refers to surfaces or components facing each other, and includes not only cases where they are completely facing each other, but also cases where they are partially facing each other. In this specification, "facing" also includes both cases where a separate component is interposed between the two parts, and cases where nothing is interposed between the two parts.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] (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, in a row along 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. The bus bars 23 form a conductive path together with the electric wires 21. The electric wires 21 are, for example, voltage detection wires for detecting the voltage of the bus bars 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.

[0023] (Configuration of Case 22) The case 22 is formed of an insulating material such as synthetic resin. The case 22 has a first bus bar holding portion 26 and a second bus bar holding portion 27. The first bus bar holding portion 26 and the second bus bar holding portion 27 have different shapes. A plurality of the first bus bar holding portions 26 and the second bus bar holding portions 27 are arranged alternately in the X direction. Two rows of the first bus bar holding portions 26 and the second bus bar holding portions 27 are provided corresponding to the two rows of the bus bars 23 arranged in the X direction. A pair of the first bus bar holding portion 26 and the second bus bar holding portion 27 adjacent to each other in the X direction holds one bus bar 23. Each bus bar 23 is arranged so as to straddle the first bus bar holding portion 26 and the second bus bar holding portion 27 adjacent to each other in the X direction.

[0024] The case 22 has a sensor housing portion 30. The sensor housing portion 30 houses a temperature sensor 60 for detecting the temperature of the battery 11. 2 and 3 are views showing the vicinity of the sensor accommodating section 30 in the case 22. The case 22 has an electric wire accommodating section 31 extending in the X direction. The electric wire accommodating section 31 has a bottom wall 32 and a pair of side walls 33, 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. The side walls 33, 34 extend upward from the bottom wall 32. The electric wire 21 is accommodated between the pair of side walls 33, 34 in the Y direction. Of the pair of side walls 33, 34, the side wall located on the inner side in the Y direction is referred to as the side wall 33, and the side wall located on the outer side in the Y direction is referred to as the side wall 34. The first bus bar holding section 26 and the second bus bar holding section 27 are provided on the outer side in the Y direction of the electric wire accommodating section 31. The open upper side of the electric wire accommodating section 31 is covered by the cover 25.

[0025] The sensor accommodating portion 30 is formed so as to straddle one first bus bar holding portion 26 and one second bus bar holding portion 27 adjacent to each other in the X direction. Note that, hereinafter, the first bus bar holding portion 26 and the second bus bar holding portion 27 in which the sensor accommodating portion 30 is formed will be described as the first bus bar holding portion 26a and the second bus bar holding portion 27a, respectively. Furthermore, the first bus bar holding portion 26 adjacent to the second bus bar holding portion 27a in the X direction and located on the opposite side of the first bus bar holding portion 26a will be referred to as the first bus bar holding portion 26b. Furthermore, the second bus bar holding portion 27 adjacent to the first bus bar holding portion 26a in the X direction and located on the opposite side of the second bus bar holding portion 27a will be referred to as the second bus bar holding portion 27b. 3, the first bus bar holding portion 26 other than the first bus bar holding portions 26a and 26b is referred to as a first bus bar holding portion 26c, and the second bus bar holding portion 27 other than the second bus bar holding portions 27a and 27b is referred to as a second bus bar holding portion 27c.

[0026] As shown in FIG. 3 , the first bus bar holding portions 26b, 26c and the second bus bar holding portions 27b, 27c extend outward in the Y direction from the wire accommodating portion 31. The first bus bar holding portion 26a and the second bus bar holding portion 27a extend outward in the Y direction from the sensor accommodating portion 30. A first opening 35 is provided in a side wall 34 of the wire accommodating portion 31 at a position corresponding to the second bus bar holding portions 27b, 27c. Furthermore, a second opening 36 is provided in a side wall 34 of the wire accommodating portion 31 at a position corresponding to the second bus bar holding portion 27a. The electric wire 21 is drawn outward in the Y direction from inside the wire accommodating portion 31 through the first opening 35 or the second opening 36.

[0027] (Configuration of sensor housing 30) 2 and 3, the case 22 has an opposing wall portion 37 that straddles the first bus bar holding portion 26a and the second bus bar holding portion 27a. The opposing wall portion 37 is provided on the outer side in the Y direction of the side wall 34 of the wire accommodating portion 31. The opposing wall portion 37 is, for example, parallel to the side wall 34. The opposing wall portion 37 faces the side wall 34 in the Y direction. The first bus bar holding portion 26a extends outward in the Y direction from the opposing wall portion 37.

[0028] The sensor accommodating portion 30 is provided between the side wall 34 and the opposing wall portion 37. The sensor accommodating portion 30 is also provided between the first bus bar holding portion 26a and the electric wire accommodating portion 31. The sensor accommodating portion 30 has a spring support portion 38. The spring support portion 38 is formed to connect the side wall 34 and the opposing wall portion 37.

[0029] As shown in FIG. 4, the sensor accommodating portion 30 accommodates 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 biasing force of the spring member 61 presses the temperature detection surface 60a of the temperature sensor 60 against the upper surface 12a of the battery cell 12. The case 22 is also provided with a holding claw 39 that holds the temperature sensor 60. As shown in FIG. 2, the holding claw 39 is provided at the base end of the second bus bar holding portion 27a.

[0030] (Configuration of the first locking portion 41 and the second locking portion 51) As shown in FIG. 2, the case 22 has a first locking portion 41 and a second locking portion 51 on both sides of the sensor housing portion 30 in the X direction.

[0031] The first locking portion 41 is provided at the base end of the first bus bar holding portion 26b. The first locking portion 41 has, for example, a first extending portion 42, a second extending portion 43, and a claw portion 44. The first extending portion 42 extends upward in the Z direction from the first bus bar holding portion 26b. The second extending portion 43 is folded back in a substantially U-shape from the upper end of the first extending portion 42 and extends downward in the Z direction. The first locking portion 41 is formed to be flexible in the X direction due to the substantially U-shape formed by the first extending portion 42 and the second extending portion 43. The case 22 also has, for example, a connecting wall 45 connecting the first locking portion 41 and the side wall 34.

[0032] The claw portion 44 protrudes in the X direction from the lower end of the second extending portion 43, for example. The claw portion 44 is locked to a 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 claw portion 44 is inserted into a locking hole 72 provided in the first locked portion 71. The claw portion 44 is then hooked onto the locking hole 72 upward in the Z direction. In this way, the first locking portion 41 holds the case 22 so that it does not separate from the battery 11 in the Z direction.

[0033] The second locking portion 51 is provided at the base end of the second bus bar holding portion 27b. The second locking portion 51 has, for example, a first extending portion 52, a second extending portion 53, and a claw portion 54. The first extending portion 52 extends upward in the Z direction from the second bus bar holding portion 27b. The second extending portion 53 is folded back from the upper end of the first extending portion 52 in a substantially U-shape and extends downward in the Z direction. The second locking portion 51 is formed to be flexible in the X direction due to the substantially U-shape formed by the first extending portion 52 and the second extending portion 53. The case 22 also has, for example, a connecting wall 55 connecting the second locking portion 51 and the side wall 34.

[0034] The claw portion 54 protrudes in the X direction from the lower end of the second extending portion 53, for example. The claw portion 54 is locked to a 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 claw portion 54 is inserted into a locking hole 82 provided in the second locked portion 81. The claw portion 54 is then hooked onto the locking hole 82 upward in the Z direction. In this way, the second locking portion 51 holds the case 22 so that it does not separate from the battery 11 in the Z direction.

[0035] The operation of this embodiment will be described. When the case 22 is attached to the battery 11, the spring member 61, which applies a biasing force to the temperature sensor 60, applies a force to the spring support portion 38 of the sensor accommodating portion 30 in a direction pushing up the spring support portion 38. Here, the first locking portion 41 and the second locking portion 51, which are located on both sides of the sensor accommodating portion 30 in the X direction, are locked to the first locked portion 71 and the second locked portion 81, respectively. In other words, the force of the spring member 61 pushing up the spring support portion 38 can be received by the first locking portion 41 and the second locking portion 51. This makes it possible to prevent the sensor accommodating portion 30 from floating up from the battery 11 due to the force of the spring member 61.

[0036] The effects of this embodiment will be described. (1) The case 22 has a first locking portion 41 and a second locking portion 51 that are respectively locked to a first locked portion 71 and a second locked portion 81 provided on the battery 11. With this configuration, the first locking portion 41 and the second locking portion 51 can hold the case 22 so that it does not separate from the battery 11. This makes it possible to prevent the case 22 from floating up.

[0037] (2) Case 22 has multiple locking portions, namely, first locking portions 41 and second locking portions 51. With this configuration, first locking portions 41 and second locking portions 51 can firmly hold case 22 to battery 11 so that it does not come off.

[0038] (3) The sensor accommodating section 30 is provided between the first locking section 41 and the second locking section 51 in the X direction. With this configuration, the first locking section 41 and the second locking section 51 can hold the case 22 on both sides of the sensor accommodating section 30 so that it does not separate from the battery 11. This allows the first locking section 41 and the second locking section 51 to preferably receive the reaction force of the force pressing the temperature sensor 60 against the battery 11. As a result, it is possible to more preferably prevent the portion of the case 22 including the sensor accommodating section 30 from lifting up.

[0039] (4) The battery 11 includes a plurality of battery cells 12 arranged side by side along the X direction. The sensor accommodating section 30, the first locking section 41, and the second locking section 51 are aligned in the direction in which the plurality of battery cells 12 are aligned. This configuration makes it possible to provide the first locking section 41 and the second locking section 51 on both sides of the sensor accommodating section 30 in the direction in which the battery cells 12 are aligned. As a result, the first locking section 41 and the second locking section 51 can effectively prevent the case 22 from lifting up.

[0040] (5) The case 22 has a plurality of first bus bar holding portions 26 and second bus bar holding portions 27 that hold the bus bars 23 that form conductive paths together with the electric wires 21. The plurality of first bus bar holding portions 26 and second bus bar holding portions 27 are arranged side by side in the direction in which the plurality of battery cells 12 are arranged side by side, i.e., along the X direction. The sensor accommodating portion 30 is provided straddling the first bus bar holding portions 26 a and second bus bar holding portions 27 a that are adjacent to each other in the X direction. The first locking portion 41 and the second locking portion 51 are provided on the first bus bar holding portions 26 b and second bus bar holding portions 27 b on both sides of the pair of first bus bar holding portions 26 a and second bus bar holding portions 27 a that the sensor accommodating portion 30 straddles. This configuration makes it possible to provide the first locking portion 41 and the second locking portion 51 at positions closer to both sides of the sensor accommodating portion 30. As a result, the first locking portion 41 and the second locking portion 51 can effectively prevent the case 22 from floating up.

[0041] (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.

[0042] The protrusion-recess relationship in the locking structure between the first locking portion 41 and the first locked portion 71 may be reversed from that in the above embodiment. That is, a protrusion may be provided on the first locked portion 71, and a recess into which the protrusion fits for locking may be provided on the first locking portion 41. Similarly, a protrusion may be provided on the second locked portion 81, and a recess into which the protrusion fits for locking may be provided on the second locking portion 51.

[0043] In the above embodiment, the first locking portion 41 and the second locking portion 51 are provided on both sides of the sensor accommodating portion 30 in the X direction. However, the first locking portion 41 and the second locking portion 51 may also be provided on both sides of the sensor accommodating portion 30 in the Y direction, for example.

[0044] In the above embodiment, one of the first locking portion 41 and the second locking portion 51 may be omitted. That is, the number of locking portions of the case 22 that are locked to the locked portions of the battery 11 may be one.

[0045] In the above embodiment, the sensor accommodating portion 30 is provided across the first bus bar holding portion 26a and the second bus bar holding portion 27a, but the position of the sensor accommodating portion 30 in the case 22 is not particularly limited to that in the above embodiment.

[0046] 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]

[0047] 10 Battery wiring module 11 Batteries 12 battery cells 12a Top side 13 Module mounting surface 14 Battery terminal 21 Electric wire 22 cases 23 Bus Bar 24 connectors 25 Cover 26 (26a, 26b, 26c) First bus bar holding portion (bus bar holding portion) 27 (27a, 27b, 27c) Second bus bar holding portion (bus bar holding portion) 30 Sensor housing 31 Wire housing section 32 Bottom wall 33,34 side wall 35 First opening 36 Second Opening 37 Opposing wall 38 Spring support 39 Holding claw 41 First locking portion (locking portion) 42 1st extension part 43 Second extension part 44 Claw 45 Connecting wall 51 Second locking portion (locking portion) 52 1st extension part 53 Second extension part 54 Claw 55 Connecting wall 60 Temperature Sensor 60a Temperature detection surface 61 Spring member 71 First locked part (locked part) 72 Locking hole 81 Second locked part (locked part) 82 Locking hole

Claims

[Claim 1] A battery wiring module to be attached to a battery, an electric wire electrically connected to the battery; a case for accommodating the electric wire, the case has a sensor housing portion that houses a temperature sensor for detecting the temperature of the battery, and a locking portion that is locked to a locked portion provided on the battery, The locking portion is provided in plurality, a plurality of the locked portions are provided corresponding to the plurality of locking portions, the plurality of locking portions include a first locking portion and a second locking portion, the plurality of locked portions include a first locked portion to which the first locking portion is locked and a second locked portion to which the second locking portion is locked, the sensor accommodating portion is provided between the first locking portion and the second locking portion, the battery includes a plurality of battery cells arranged in parallel along one direction; the sensor accommodating portion, the first locking portion, and the second locking portion are aligned in the juxtaposition direction of the plurality of battery cells, the case has a plurality of bus bar holding portions that hold bus bars that form conductive paths together with the electric wires, the plurality of bus bar holding portions are arranged in parallel along the direction in which the plurality of battery cells are arranged in parallel, the sensor accommodating portion is provided across a pair of adjacent bus bar holding portions among the plurality of bus bar holding portions, the first locking portion and the second locking portion are provided on bus bar holding portions that are different from the pair of bus bar holding portions that the sensor accommodating portion straddles, among the plurality of bus bar holding portions, and that are located adjacent to each of the pair of bus bar holding portions; Battery wiring module.

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