Battery wiring module

Abstract

One aspect of the present invention provides a battery wiring module capable of suppressing floating of a case. The case (22) has a sensor housing part (30), a first locking part (41), and a second locking part (51). The sensor housing part (30) houses a temperature sensor (60) for detecting the temperature of the battery. The first locking portion (41) is locked to a first locked portion (71) provided to the battery. The second locking part (51) is locked to a second locked part (81) provided to the battery.

Description

Technical Field

[0001] The invention 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 battery wiring module is installed on a high-voltage battery mounted as a driving power source. The battery wiring module includes wires electrically connected to the battery and a housing for storing the wires. A temperature sensor for detecting the temperature of the battery is also stored in the housing. The temperature sensor is pressed against the battery by a force application portion such as a spring. In this way, the temperature of the battery is detected with high accuracy. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2014-89912 Summary of the invention Problems to be solved by the invention

[0004] When the force applied by the biasing portion to press the temperature sensor with the battery wiring module mounted on the battery is used as the pressing force, the case may be separated from the battery due to a reaction force to the pressing force, which is called floating.

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

[0006] The battery wiring module of the present invention can be installed on a battery, and the battery wiring module includes wires electrically connected to the battery and a shell for storing the wires, the shell has a sensor storing portion and a locking portion, the sensor storing portion stores a temperature sensor for detecting the temperature of the battery, and the locking portion is locked with a locked portion provided on the battery. Effects of the Invention

[0007] The battery wiring module of the present invention has the effect of suppressing the floating of the case. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic plan view of a battery wiring module according to an embodiment. Figure 2 This is a perspective view showing a part of a casing in the battery wiring module of this embodiment. Figure 3 1 is a plan view showing a portion of a casing in the battery wiring module of this embodiment. Figure 4 yes Figure 3 The 4-4 line section view in. DETAILED DESCRIPTION

[0009] [Description of Embodiments of the Invention] First, embodiments of the present invention will be described by way of examples. The battery wiring module of the present invention, [1] A battery wiring module can be installed on a battery, wherein the battery wiring module includes an electric wire electrically connected to the battery and a shell for storing the electric wire, the shell having a sensor storage portion and a locking portion, the sensor storage portion storing a temperature sensor for detecting the temperature of the battery, and the locking portion being locked with a locked portion provided on the battery.

[0010] According to this structure, the case can be held so as not to be separated from the battery by the locking portion locked with the locked portion of the battery. Thus, it is possible to suppress the case from floating.

[0011] [2] In the above [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 structure, the case can be firmly held by the plurality of locking portions so as not to be separated from 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 engaged portions may include a first engaged portion and a second engaged portion, the first locking portion is engaged with the first engaged portion, the second locking portion is engaged with the second engaged portion, and the sensor housing portion is disposed between the first locking portion and the second locking portion.

[0013] According to this structure, the first locking portion and the second locking portion can hold the housing on both sides of the sensor housing so that the housing does not come away from the battery. This can more appropriately suppress the floating of the portion of the housing including the sensor housing.

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

[0015] According to this structure, the first locking part and the second locking part can be provided on both sides of the sensor storage part in the arrangement direction of the battery cells. As a result, the first locking part and the second locking part can appropriately suppress the floating of the case.

[0016] [5] In the above [4], the shell may have a plurality of bus bar holding portions, the plurality of bus bar holding portions holding bus bars that form a conductive path together with the electric wires, the plurality of bus bar holding portions being arranged along the arrangement direction of the plurality of battery cells, the sensor housing portion being arranged across a pair of adjacent bus bar holding portions among the plurality of bus bar holding portions, and the first locking portion and the second locking portion being arranged on a bus bar holding portion among the plurality of bus bar holding portions that is different from the pair of bus bar holding portions spanned by the sensor housing portion and being located next to each of the pair of bus bar holding portions.

[0017] According to this structure, the first locking part and the second locking part can be provided at positions closer to both sides of the sensor housing portion. As a result, the first locking part and the second locking part can appropriately suppress the floating of the housing.

[0018] [Details of Embodiments of the Invention] A specific example of the battery wiring module of the present invention is described below with reference to the accompanying drawings. In each of the drawings, for the sake of convenience of explanation, a part of the structure is sometimes enlarged or simplified. In addition, the size ratios of the various parts are sometimes different in the various drawings. In addition, "opposing" in this specification refers to the position where the surfaces or components are located directly opposite each other, including not only the situation where they are completely located directly opposite each other, but also the situation where they are partially located directly opposite each other. In addition, "opposing" in this specification includes both the situation where a component independent of the two parts is interposed between the two parts, and the situation where nothing is sandwiched between the two parts.

[0019] like Figure 1 As shown, the battery wiring module 10 of this embodiment is installed in a battery 11 mounted on an electric vehicle, a hybrid vehicle, etc., for example. The battery 11 is, for example, a secondary battery. The battery 11 supplies power to a driving motor of the vehicle (not shown). In addition, the battery 11 receives power supply from the driving motor and the power generation motor according to the charging state and the operating state of the vehicle.

[0020] The battery 11 includes a plurality of battery cells 12. The battery 11 is formed into, for example, a substantially rectangular parallelepiped shape by arranging the plurality of battery cells 12 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. In addition, the Z direction orthogonal to the X direction and the Y direction is referred to as the up-down direction, and the side on which the battery wiring module 10 is mounted relative to the battery 11 is referred to as the top. That is, the battery 11 has a module mounting surface 13 on the side surface on the top side on which the battery wiring module 10 is mounted.

[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 each battery cell 12 is arranged in the X direction, the two battery terminals 14 are arranged in the Y direction on the upper surface of the battery cell 12.

[0022] (Structure of Battery Wiring Module 10) The battery wiring module 10 includes a plurality of electric wires 21 electrically connected to the battery 11 and a housing 22 for accommodating each of the electric wires 21. In addition, the battery wiring module 10 includes, for example, a plurality of bus bars 23 supported by the housing 22. For example, a plurality of bus bars 23 are arranged along the X direction on both sides of the housing 22 in the Y direction. Each bus bar 23 connects the battery terminals 14 adjacent to each other in the X direction. The bus bar 23 is connected to the battery terminal 14 by welding, for example. 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, and the connector 24 is used to connect to a voltage detection device not shown. In addition, the battery wiring module 10 includes a cover 25 covering the upper part of the housing 22.

[0023] (Structure of Housing 22) The housing 22 is formed of an insulator such as a synthetic resin. The housing 22 has a first bus bar holding portion 26 and a second bus bar holding portion 27. The shapes of the first bus bar holding portion 26 and the second bus bar holding portion 27 are different from each other. A plurality of first bus bar holding portions 26 and second bus bar holding portions 27 are arranged alternately in the X direction. Two columns of the columns formed by the first bus bar holding portions 26 and the second bus bar holding portions 27 are provided corresponding to the two columns of the bus bars 23 arranged in the X direction. A pair of first bus bar holding portions 26 and second bus bar holding portions 27 adjacent in the X direction hold one bus bar 23. Each bus bar 23 is provided in a manner spanning the first bus bar holding portion 26 and the second bus bar holding portion 27 adjacent in the X direction.

[0024] The housing 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 . Figure 2 and Figure 32 is a diagram showing the vicinity of the sensor storage section 30 in the housing 22. The housing 22 has a wire storage section 31 extending in the X direction. The wire storage 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. Each side wall 33, 34 extends upward from the bottom wall 32. The wires 21 are stored between the pair of side walls 33, 34 in the Y direction. In addition, the side wall located on the inner side in the Y direction of the pair of side walls 33, 34 is used as the side wall 33, and the side wall located on the outer side in the Y direction is used as the side wall 34. The first bus bar holding portion 26 and the second bus bar holding portion 27 are provided on the outer side of the wire storage section 31 in the Y direction. In addition, the upper side of the opening of the wire storage section 31 is covered by the cover 25.

[0025] The sensor housing portion 30 is formed in a manner spanning a first bus bar holding portion 26 and a second bus bar holding portion 27 that are adjacent to each other in the X direction. In addition, the first bus bar holding portion 26 and the second bus bar holding portion 27 that form the sensor housing portion 30 will be described below as the first bus bar holding portion 26a and the second bus bar holding portion 27a, respectively. In addition, the first bus bar holding portion 26 that is adjacent to the second bus bar holding portion 27a in the X direction and is located on the side opposite to the first bus bar holding portion 26a will be referred to as the first bus bar holding portion 26b. In addition, the second bus bar holding portion 27 that is adjacent to the first bus bar holding portion 26a in the X direction and is located on the side opposite to the second bus bar holding portion 27a will be referred to as the second bus bar holding portion 27b. In addition, as Figure 3 As shown, 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. Also, 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] like Figure 3 As shown, the first bus bar holding portions 26b, 26c and the second bus bar holding portions 27b, 27c extend from the wire storage portion 31 to the outside in the Y direction. The first bus bar holding portion 26a and the second bus bar holding portion 27a extend from the sensor storage portion 30 to the outside in the Y direction. A first opening portion 35 is provided in the side wall 34 of the wire storage portion 31 at a position corresponding to the second bus bar holding portions 27b, 27c. In addition, a second opening portion 36 is provided in the side wall 34 of the wire storage portion 31 at a position corresponding to the second bus bar holding portion 27a. The wires 21 are led out from the inside of the wire storage portion 31 to the outside in the Y direction through the first opening portion 35 or the second opening portion 36.

[0027] (Structure of sensor housing portion 30) like Figure 2 and Figure 3 As shown, the housing 22 has an opposing wall portion 37 provided across the first bus bar holding portion 26a and the second bus bar holding portion 27a. The opposing wall portion 37 is provided outside the side wall 34 of the wire storage portion 31 in the Y direction. The opposing wall portion 37 is, for example, parallel to the side wall 34. The opposing wall portion 37 is opposed to the side wall 34 in the Y direction. The first bus bar holding portion 26a extends from the opposing wall portion 37 to the outside in the Y direction.

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

[0029] like Figure 4 As shown, the sensor storage portion 30 stores a temperature sensor 60 and a spring member 61. The spring member 61 is provided between the temperature sensor 60 and the spring support portion 38. The spring member 61 applies force to 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 force of the spring member 61. In addition, a retaining claw 39 for retaining the temperature sensor 60 is provided on the housing 22. Figure 2 As shown, the holding claw 39 is provided at the base end portion of the second bus bar holding portion 27a.

[0030] (Structure of the First Locking Portion 41 and the Second Locking Portion 51) like Figure 2 As shown, the housing 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 portion of the first bus bar holding portion 26b. The first locking portion 41 includes, 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 bus bar holding portion 26b. The second extension portion 43 is folded back from the upper end of the first extension portion 42 into a substantially U-shape and extends downward in the Z direction. The first locking portion 41 is formed to be able to bend in the X direction by the substantially U-shape formed by the first extension portion 42 and the second extension portion 43. In addition, the housing 22 includes, for example, a connecting wall 45 connecting the first locking portion 41 and the side wall 34.

[0032] The claw portion 44 protrudes from the lower end of the second extension portion 43 in the X direction, for example. The claw portion 44 is locked with the first locked portion 71 provided on the battery 11. The first locked portion 71 is a portion of the battery 11 extending upward from the battery 11. For example, the claw portion 44 is inserted into the locking hole 72 provided on the first locked portion 71. And the claw portion 44 is hooked on the locking hole 72 in the upper direction of the Z direction. Thus, the first locking portion 41 is held in such a manner that the housing 22 does not leave the battery 11 in the Z direction.

[0033] The second locking portion 51 is provided at the base end portion of the second bus bar holding portion 27b. The second locking portion 51 includes, 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 bus bar holding portion 27b. The second extension portion 53 is folded back from the upper end of the first extension portion 52 into a substantially U-shape and extends downward in the Z direction. The second locking portion 51 is formed to be able to bend in the X direction by the substantially U-shape formed by the first extension portion 52 and the second extension portion 53. In addition, the housing 22 includes, for example, a connecting wall 55 connecting the second locking portion 51 and the side wall 34.

[0034] The claw portion 54 protrudes from the lower end of the second extension portion 53 in the X direction, for example. The claw portion 54 is locked with the second locked portion 81 provided on the battery 11. The second locked portion 81 is a portion of the battery 11 extending upward from the battery 11. For example, the claw portion 54 is inserted into the locking hole 82 provided on the second locked portion 81. And the claw portion 54 is hooked on the locking hole 82 in the upper direction of the Z direction. Thus, the second locking portion 51 is held in such a manner that the housing 22 does not leave the battery 11 in the Z direction.

[0035] The operation of this embodiment will be described. In the state where the housing 22 is assembled to the battery 11, the spring member 61 that applies the force to the temperature sensor 60 applies a force in the direction of pushing up the spring support portion 38 to the spring support portion 38 of the sensor housing portion 30. Here, the first locking portion 41 and the second locking portion 51 located on both sides of the sensor housing portion 30 in the X direction are locked with the first locked portion 71 and the second locked 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 locking portion 41 and the second locking portion 51. Therefore, the force of the spring member 61 can suppress the sensor housing portion 30 from floating up from the battery 11.

[0036] The effects of this embodiment will be described. (1) The housing 22 has the first locking portion 41 and the second locking portion 51, and the first locking portion 41 and the second locking portion 51 are respectively locked with the first locked portion 71 and the second locked portion 81 provided on the battery 11. According to this structure, the housing 22 can be held by the first locking portion 41 and the second locking portion 51 so as not to be separated from the battery 11. Thus, it is possible to suppress the housing 22 from floating.

[0037] (2) The case 22 has a plurality of locking portions, namely, the first locking portion 41 and the second locking portion 51. With this configuration, the case 22 can be firmly held by the first locking portion 41 and the second locking portion 51 so as not to be separated from the battery 11.

[0038] (3) The sensor housing portion 30 is provided between the first locking portion 41 and the second locking portion 51 in the X direction. According to this structure, the housing 22 can be held on both sides of the sensor housing portion 30 by the first locking portion 41 and the second locking portion 51 so as not to be separated from the battery 11. Thus, the reaction force of the force pressing the temperature sensor 60 to the battery 11 can be appropriately received by the first locking portion 41 and the second locking portion 51. As a result, the floating of the portion of the housing 22 including the sensor housing portion 30 can be more appropriately suppressed.

[0039] (4) The battery 11 includes a plurality of battery cells 12 arranged in an array along the X direction. Furthermore, the sensor housing portion 30, the first latching portion 41, and the second latching portion 51 are arranged in the arrangement direction of the plurality of battery cells 12. According to this structure, the first latching portion 41 and the second latching portion 51 can be provided on both sides of the sensor housing portion 30 in the arrangement direction of the battery cells 12. As a result, the first latching portion 41 and the second latching portion 51 can appropriately suppress the floating of the housing 22.

[0040] (5) The housing 22 has a plurality of first bus bar retaining portions 26 and a second bus bar retaining portion 27, and the plurality of first bus bar retaining portions 26 and the second bus bar retaining portions 27 retain the bus bar 23 that forms a conductive path together with the electric wire 21. The plurality of first bus bar retaining portions 26 and the second bus bar retaining portions 27 are arranged along the arrangement direction of the plurality of battery cells 12, that is, the X direction. The sensor storage portion 30 is arranged across the first bus bar retaining portion 26a and the second bus bar retaining portion 27a adjacent to each other in the X direction. In addition, the first locking portion 41 and the second locking portion 51 are provided on the first bus bar retaining portion 26b and the second bus bar retaining portion 27b on both sides of the pair of first bus bar retaining portions 26a and the second bus bar retaining portion 27a across which the sensor storage portion 30 spans. According to this configuration, the first locking portion 41 and the second locking portion 51 can be provided at closer positions on both sides of the sensor housing portion 30. As a result, the first locking portion 41 and the second locking portion 51 can appropriately suppress the housing 22 from floating.

[0041] (Variation Example) This embodiment can be implemented as the following modifications. This embodiment and the following modifications can be implemented in combination with each other within the range that there is no technical contradiction.

[0042] The relationship between the concave and convex in the locking structure of the first locking portion 41 and the first locked portion 71 may be reversed from that in the above embodiment. That is, a convex portion may be provided on the first locked portion 71, and a concave portion may be provided on the first locking portion 41, and the convex portion may enter the concave portion and lock with the first locking portion. Similarly, a convex portion may be provided on the second locked portion 81, and a concave portion may be provided on the second locking portion 51, and the convex portion may enter the concave portion and lock with the second locking portion.

[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. Alternatively, for example, the first locking portion 41 and the second locking portion 51 may 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. In other words, the number of the locking portion of the case 22 that is locked with the locked portion of the battery 11 may be one.

[0045] The sensor housing portion 30 in the above embodiment is provided across the first bus bar holding portion 26 a and the second bus bar holding portion 27 a , but the arrangement position of the sensor housing portion 30 in the housing 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 illustrative examples. That is, the scope of the present invention is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. Description of Reference Numerals

[0047] 10 Battery wiring module 11. Battery 12 Battery Cells 12a Upper surface 13 Module mounting surface 14 Battery Terminals 21 Wire 22 Housing 23 Busbar 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 storage area 31 Wire storage area 32 bottom wall 33, 34 side wall 35 1st opening 36 2nd opening 37 Opposing wall 38 Spring support 39 Keep Claw 41 first locking portion (locking portion) 42 1st extension 43 2nd extension 44 claws 45 Connection wall 51 second locking portion (locking portion) 52 1st extension 53 2nd extension 54 claws 55 Connection wall 60 Temperature Sensor 60a Temperature detection surface 61 Spring member 71 first stopped portion (stopped portion) 72 stop hole 81 second stopped portion (stopped portion) 82 stop hole

Claims

1. A battery wiring module, which can be installed on a battery, The battery wiring module comprises: A wire electrically connected to the battery and a housing for accommodating the electric wires, The housing includes a sensor housing portion for housing a temperature sensor for detecting a temperature of the battery and a locking portion that is locked to a locked portion provided on the battery.

2. The battery wiring module according to claim 1, wherein: A plurality of the stopper portions are provided, A plurality of the locked portions are provided corresponding to the plurality of locking portions, respectively.

3. The battery wiring module according to claim 2, wherein: 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 and a second locked portion, the first locked portion is locked with the first locked portion, and the second locked portion is locked with the second locked portion. The sensor housing portion is provided between the first locking portion and the second locking portion.

4. The battery wiring module according to claim 3, wherein: The battery comprises a plurality of battery cells arranged along a direction, The sensor housing portion, the first locking portion, and the second locking portion are arranged in a direction in which the plurality of battery cells are arranged.

5. The battery wiring module according to claim 4, wherein: The housing has a plurality of bus bar holding portions that hold bus bars that form a conductive path together with the electric wires. The plurality of bus bar holding portions are arranged in a row along the arrangement direction of the plurality of battery cells. The sensor housing 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 straddled by the sensor housing portion among the plurality of bus bar holding portions and are located next to each of the pair of bus bar holding portions.

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