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

[0006] ,

[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 that houses the electric wire. The case also houses a temperature sensor that detects the temperature of the battery. The temperature sensor is pressed against the battery by a biasing portion such as a spring. Thereby, the temperature detection of the battery is realized with high accuracy.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the biasing portion presses the temperature sensor in a state where the battery wiring module is attached to the battery, if the force when the biasing portion presses the temperature sensor is defined as the pressing force, there is a possibility that the case may be separated from the battery due to the reaction force of the pressing force, so-called floating may occur.

[0005] An object of the present disclosure is to provide a battery wiring module capable of suppressing the floating of the case.

Means for Solving the Problems

[0006] The battery wiring module of this disclosure is 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 a sensor housing portion for housing a temperature sensor for detecting the temperature of the battery; and a locking portion for locking to a locking portion provided on the battery. [Effects of the Invention]

[0007] The battery wiring module of this disclosure has the effect of suppressing the lifting of the case. [Brief explanation of the drawing]

[0008] [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. [Modes for carrying out the invention]

[0009] [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 a sensor housing portion for housing a temperature sensor for detecting the temperature of the battery and a locking portion that locks to a locking portion provided on the battery.

[0010] With this configuration, the case can be held in place by a locking mechanism that engages with the battery's locking mechanism, preventing it from separating from the battery. This makes it possible to suppress the case from lifting up.

[0011] [2] In the above [1], there may be a plurality of locking portions, and there may be a plurality of locked portions corresponding to each of the plurality of locking portions. This configuration allows the case to be firmly held in place by multiple locking mechanisms, preventing it from separating from the battery.

[0012] [3] In the above [2], the plurality of locking portions includes a first locking portion and a second locking portion, and the plurality of locked portions includes 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 housing portion may be provided between the first locking portion and the second locking portion.

[0013] With this configuration, the first and second locking parts make it possible to hold the case in place on both sides of the sensor housing so that it does not separate from the battery. This makes it possible to more effectively suppress the lifting of the part of the case that includes the sensor housing.

[0014] [4] In the above [3], the battery includes a plurality of battery cells arranged in parallel in one direction, and the three, the sensor housing, the first locking portion and the second locking portion, may be arranged in the direction in which the plurality of battery cells are arranged in parallel.

[0015] This configuration makes it possible to provide a first locking portion and a second locking portion on both sides of the sensor housing portion in the direction in which the battery cells are arranged side by side. As a result, the first locking portion and the second locking portion effectively suppress the case from lifting up.

[0016] [5] In [4] above, the case has a plurality of bus bar holding parts that hold a bus bar forming a conductive path together with the electric wire. The plurality of bus bar holding parts are arranged in parallel along the parallel arrangement direction of the plurality of battery cells. The sensor housing part is provided straddling a pair of adjacent bus bar holding parts among the plurality of bus bar holding parts. The first locking part and the second locking part may be provided on bus bar holding parts different from the pair of bus bar holding parts straddled by the sensor housing part among the plurality of bus bar holding parts and located adjacent to each of the pair of bus bar holding parts.

[0017] According to this configuration, it becomes possible to provide the first locking part and the second locking part at positions closer to both sides of the sensor housing part. As a result, it becomes possible to suitably suppress the lifting of the case by the first locking part and the second locking part.

[0018] [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. In this specification, "opposing" means that surfaces or members are in a front-facing position with respect to each other, and includes not only the case where they are completely in a front-facing position with respect to each other, but also the case where they are partially in a front-facing position with respect to each other. Also, in this specification, "opposing" includes both the case where a member different from the two parts is interposed between the two parts and the case where nothing is interposed between the two parts.

[0019] As shown in FIG. 1, the battery wiring module 10 of the present embodiment is, for example, attached to a battery 11 mounted on 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 traveling motor of a vehicle (not shown). Also, the battery 11 receives electric power supply from the traveling motor or the power generation motor according to the charging state and the driving state of the vehicle.

[0020] The battery 11 includes a plurality of battery cells 12. The battery 11 has a substantially rectangular parallelepiped shape, for example, by arranging the 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, and the direction orthogonal to the X direction is referred to as the Y direction. Further, the Z direction orthogonal to the X direction and the Y direction 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 mounted 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 electrode side terminal, and the other is a negative electrode side terminal. 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.

[0022] (Configuration of the battery wiring module 10) The battery wiring module 10 includes a plurality of electric wires 21 electrically connected to the battery 11 and a case 22 that houses each electric wire 21. Further, the battery wiring module 10 includes, for example, a plurality of bus bars 23 supported by the case 22. Each bus bar 23 is arranged side by side along the X direction, for example, on both sides in the Y direction of the case 22. Each bus bar 23 connects adjacent battery terminals 14 in the X direction. The bus bar 23 is connected to the battery terminal 14, for example, by welding. Each bus bar 23 is electrically connected to a corresponding electric wire 21. The bus bar 23 forms a conductive path together with the electric wire 21. The electric wire 21 is, for example, a voltage detection electric wire for detecting the voltage of the bus bar 23. Each electric wire 21 is connected to a connector 24 for connecting to a voltage detection device (not shown). Further, the battery wiring module 10 includes a cover 25 that covers the upper part of the case 22.

[0023] (Configuration of the 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] (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.

[0028] 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.

[0029] 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. The case 22 is also provided with retaining claws 39 for holding the temperature sensor 60. As shown in Figure 2, the retaining claws 39 are provided at the base end of the second busbar retaining portion 27a.

[0030] (Configuration of the first locking part 41 and the second locking part 51) As shown in Figure 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 busbar holding portion 26b. The first locking portion 41 has, for example, a first extension portion 42, a second extension portion 43, and a claw portion 44. The first extension portion 42 extends upward in the Z direction from the first busbar holding portion 26b. The second extension portion 43 is folded back in a substantially U shape from the upper end of the first extension portion 42 and extends downward in the Z direction. The first locking portion 41 is formed to bend in the X direction due to the substantially U shape formed by the first extension portion 42 and the second extension portion 43. The case 22 also has, for example, a connecting wall 45 that connects the first locking portion 41 and the side wall 34.

[0032] The claw portion 44 protrudes in the X direction from, for example, the lower end of the second extension portion 43. The claw portion 44 is locked to a first locking portion 71 provided on the battery 11. The first locking 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 locking portion 71. The claw portion 44 is then designed to catch on the locking hole 72 in the Z direction upward. As a result, 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 busbar holding portion 27b. The second locking portion 51 has, for example, a first extension portion 52, a second extension portion 53, and a claw portion 54. The first extension portion 52 extends upward in the Z direction from the second busbar holding portion 27b. The second extension portion 53 is folded back in a substantially U shape from the upper end of the first extension portion 52 and extends downward in the Z direction. The second locking portion 51 is formed to bend in the X direction due to the substantially U shape formed by the first extension portion 52 and the second extension portion 53. The case 22 also has, for example, a connecting wall 55 that connects the second locking portion 51 and the side wall 34.

[0034] The claw portion 54 protrudes in the X direction from, for example, the lower end of the second extension portion 53. The claw portion 54 is locked to a second locking portion 81 provided on the battery 11. The second locking 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 locking portion 81. The claw portion 54 is then designed to catch on the locking hole 82 in the Z direction upward. As a result, 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 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 locking portion 41 and the second locking portion 51 located on both sides of the sensor housing 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 that pushes up the spring support portion 38 can be received by the first locking portion 41 and the second locking portion 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.

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

[0037] (2) The case 22 has a plurality of locking parts, namely the first locking part 41 and the second locking part 51. With this configuration, the first locking part 41 and the second locking part 51 make it possible to firmly hold the case 22 so that it does not separate from the battery 11.

[0038] (3) The sensor housing 30 is provided between the first locking portion 41 and the second locking portion 51 in the X direction. With this configuration, the first locking portion 41 and the second locking portion 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 30. This makes it possible for the first locking portion 41 and the second locking portion 51 to suitably receive the reaction force of the force pressing the temperature sensor 60 against the battery 11. As a result, it is possible to suitably suppress the lifting of the part of the case 22 including the sensor housing 30.

[0039] (4) The battery 11 includes a plurality of battery cells 12 arranged in parallel along the X direction. The sensor housing 30, the first locking portion 41, and the second locking portion 51 are arranged in the direction in which the plurality of battery cells 12 are arranged in parallel. With this configuration, it is possible to provide the first locking portion 41 and the second locking portion 51 on both sides of the sensor housing 30 in the direction in which the battery cells 12 are arranged in parallel. As a result, the lifting of the case 22 can be suitably suppressed by the first locking portion 41 and the second locking portion 51.

[0040] (5) The case 22 has a plurality of first busbar holding parts 26 and second busbar holding parts 27 that hold busbars 23 which form a conductive path together with the electric wires 21. The plurality of first busbar holding parts 26 and second busbar holding parts 27 are arranged in parallel along the direction in which the plurality of battery cells 12 are arranged side by side, i.e., the X direction. The sensor housing part 30 is provided straddling the first busbar holding parts 26a and second busbar holding parts 27a that are adjacent in the X direction. The first locking part 41 and the second locking part 51 are provided on the first busbar holding parts 26b and second busbar holding parts 27b adjacent to the pair of first busbar holding parts 26a and second busbar holding parts 27a that the sensor housing part 30 straddles. With this configuration, it is possible to provide the first locking part 41 and the second locking part 51 in closer positions on both sides of the sensor housing part 30. As a result, the first locking portion 41 and the second locking portion 51 effectively suppress the lifting of the case 22.

[0041] (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.

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

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

[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 locking portion of the battery 11 may be just one.

[0045] • 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.

[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 indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0047] 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) 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. First locking part (locking part) 42 1st extension part 43 Second extension part 44 Claw part 45 Connecting wall 51 Second locking part (locking part) 52 1st extension part 53 Second extension part 54 Claw part 55 Connecting wall 60 Temperature Sensors 60a Temperature detection surface 61 Spring component 71 First locked part (locked part) 72 Locking holes 81 Second locked part (locked part) 82 Locking hole

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 a sensor housing for housing a temperature sensor for detecting the temperature of the battery, and a locking portion that locks onto a locking portion provided on the battery. The case is provided with retaining claws for holding the temperature sensor. Battery wiring module.

2. Multiple locking parts are provided, The locking portion is provided in multiple locations, each corresponding to one of the multiple locking portions. The battery wiring module according to claim 1.

3. The plurality of locking parts include a first locking part and a second locking part, The plurality of locking portions include a first locking portion to which the first locking portion is locked, and a second locking portion to which the second locking portion is locked, The sensor housing is provided between the first locking portion and the second locking portion. The battery wiring module according to claim 2.

4. The battery includes a plurality of battery cells arranged in parallel along one direction, The sensor housing, the first locking portion, and the second locking portion are arranged in the direction in which the plurality of battery cells are arranged side by side. The battery wiring module according to claim 3.

5. The case has a plurality of busbar holding parts that hold busbars that form a conductive path together with the electric wire, The plurality of busbar holding portions are arranged in parallel along the direction in which the plurality of battery cells are arranged side by side. The sensor housing is provided spanning a pair of adjacent busbar holding sections among the plurality of busbar holding sections. The first locking portion and the second locking portion are provided on busbar holding portions that are different from the pair of busbar holding portions that the sensor housing portion straddles, and are located adjacent to each of the pair of busbar holding portions. The battery wiring module according to claim 4.

Images