JP2019207825A - Wiring module - Google Patents

Abstract

To inhibit a bus bar from being detached from a bus bar holding part.SOLUTION: A wiring module 10 disposed in a power storage element group 12 including a plurality of arranged power storage elements 11 having an electrode terminal 14 comprises a connection bus bar 17 connected to the electrode terminal 14 and an insulation protector 15 having a connection bus bar housing part 19 for housing the connection bus bar 17. The connection bus bar housing part 19 has a plurality of peripheral walls 60 disposed around the connection bus bar 17. The plurality of peripheral walls 60 include a pair of opposite walls 60A facing each other. On an inner surface of at least one of the pair of opposite walls 60A is provided an engagement part 57 for elastically engaging with the connection bus bar 17 to hold the connection bus bar 17 in a slipout prevention state. Across the pair of opposite walls 60A is provided a reinforcement part 55. The connection bus bar 17 includes a bent part 52 protruding in a direction separated from the electrode terminal 14. The reinforcement part 55 is disposed inside the bent part 52.SELECTED DRAWING: Figure 3

Description

  The technology disclosed in this specification relates to a wiring module.

  Conventionally, as a wiring module disposed in a power storage element group in which a plurality of power storage elements having electrode terminals are arranged, one described in JP 2011-238469 A is known. It has a bus bar that connects the electrode terminals of adjacent power storage elements, and an insulation protector that has a bus bar housing portion that houses the bus bar. The bus bar accommodating portion has a peripheral wall provided around the bus bar. The peripheral wall has a rectangular shape when viewed from above.

  The inner surface of the peripheral wall is provided with a locking portion that elastically engages with the bus bar to hold the bus bar in the bus bar housing portion. The engaging portion is elastically engaged with the bus bar, so that the bus bar is housed in the bus bar housing portion in a state of being prevented from coming off.

JP 2011-238469 A

  When an external force is applied to the bus bar housing portion, the peripheral wall provided with the locking portion of the peripheral wall of the bus bar housing portion is deformed so as to open outward in the thickness direction of the peripheral wall. There is a concern that the engagement is disengaged and the bus bar is disengaged from the bus bar accommodating portion.

  The technology disclosed in the present specification has been completed based on the above-described circumstances, and an object thereof is to provide a wiring module in which the bus bar is suppressed from being detached from the bus bar accommodating portion.

  The technology disclosed in the present specification is a wiring module disposed in a power storage element group in which a plurality of power storage elements having electrode terminals are arranged, and includes a bus bar connected to the electrode terminal and the bus bar An insulating protector having a receiving portion that includes a plurality of peripheral walls disposed around the bus bar, the plurality of peripheral walls including a pair of facing walls facing each other, and the pair of facing portions At least one inner surface of the wall is provided with a locking portion that is elastically locked to the bus bar and holds the bus bar in a state of being prevented from coming off, and a reinforcing portion is bridged between the pair of opposing walls. The bus bar has a bent portion protruding in a direction away from the electrode terminal, and the reinforcing portion is disposed inside the bent portion.

  According to said structure, since the reinforcement part is spanned between a pair of opposing wall in which the latching | locking part was provided, a pair of opposing wall expands and deforms about the thickness direction of each opposing wall. This can be suppressed. Thereby, since it is suppressed that the latching structure between a bus bar and a latching | locking part is cancelled | released, it is suppressed that a bus bar remove | deviates from a bus-bar accommodating part.

  The following embodiments are preferable as embodiments of the technology disclosed in the present specification.

  A placement portion having a placement surface on which the bus bar is placed is bridged between the pair of opposing walls, and the reinforcing portion is in a direction intersecting with the placement surface and the front It is formed extending in a direction away from the writing surface.

  According to said structure, the part located in the direction which cross | intersects the mounting surface of a mounting part and is spaced apart from a mounting surface among a pair of opposing walls is the thickness direction of each opposing wall Is prevented from expanding and deforming. Thereby, since the bus bar is mounted on the mounting surface of the mounting portion, the area in the vicinity of the bus bar of the pair of opposing walls is prevented from being expanded and deformed. As a result, since the release of the locking structure between the bus bar and the locking portion is suppressed, the bus bar is reliably suppressed from being detached from the bus bar housing portion.

  The tip of the reinforcing portion in the direction away from the placement surface is arranged at a position farther from the placement surface than the tip of the locking portion in the direction of approaching the placement surface. Has been.

  According to said structure, it is suppressed that the front-end | tip part of the direction which approaches a mounting surface among latching parts expands and deforms about the thickness direction of an opposing wall. Thereby, since it is suppressed that the latching structure between a bus bar and a latching | locking part is cancelled | released, it is suppressed reliably that a bus bar remove | deviates from a bus-bar accommodating part.

  The reinforcing portion extends from a side edge of the mounting portion in a direction crossing the mounting surface.

  According to said structure, a mounting part can also be reinforced.

  A thickness dimension of the bent portion is set smaller than a thickness dimension of a portion of the bus bar different from the bent portion.

  According to said structure, when external force is applied to an electrical storage element, it can suppress that a stress is added to a bus-bar because a bending part bends and deforms.

  According to the technology disclosed in the present specification, it is possible to prevent the bus bar from being detached from the bus bar holding portion.

The top view which shows the electrical storage module which concerns on this embodiment Partially enlarged plan view showing the wiring module Sectional view taken along line III-III in FIG. Partially enlarged sectional view showing a bent part

<Embodiment 1>
Embodiment 1 of the technique disclosed in this specification will be described with reference to FIGS. 1 to 4. The wiring module 10 according to the present embodiment is attached to a power storage element group 12 in which a plurality (24 in this embodiment) of power storage elements 11 are arranged to constitute a power storage module 13. The power storage module 13 is mounted on a vehicle (not shown) such as an electric vehicle or a hybrid vehicle and used as a power source for driving the vehicle. In the following description, it is assumed that the Z direction is upward, the Y direction is front, and the X direction is left. Moreover, about several same members, a code | symbol may be attached | subjected to a part member, and a code | symbol may be abbreviate | omitted about another member.

Power storage element 11
As shown in FIG. 1, the electrical storage element 11 which concerns on this embodiment is a secondary battery. A power storage element (not shown) is accommodated in the power storage element 11. The electricity storage element 11 has a substantially rectangular parallelepiped shape. A pair of electrode terminals 14 are formed on the upper surface of the storage element 11 at positions near both ends in the front-rear direction. One of the electrode terminals 14 is a positive terminal, and the other is a negative terminal.

  The storage element group 12 is configured by arranging a plurality of sets 50 of storage elements 11 composed of three storage elements 11 arranged so that the polarities of adjacent electrode terminals 14 are the same in the left-right direction. Yes. The sets 50 of the storage elements 11 are arranged so that the polarities of the electrode terminals 14 of the sets 50 of adjacent storage elements 11 are different. For example, in a set 50 of one power storage element 11, when a positive electrode is arranged on the front side and a negative electrode is arranged on the rear side, in the set 50 of another power storage element 11 adjacent to the set 50 of one power storage element 11. Is arranged with a negative electrode on the front side and a positive electrode on the rear side.

  A pair of end plates 47, 47 are arranged on the left and right ends of the storage element group 12. The pair of end plates 47, 47 are disposed on the front side surface and the rear side surface of the power storage element group 12 and are sandwiched by a pair of sandwich plates 48, 48 fixed to the end plates 47, 47 by bolts 49.

Wiring module 10
As shown in FIG. 1, the wiring module 10 is attached to the upper surface of the power storage element group 12. As a whole, the wiring module 10 has an elongated shape in the left-right direction.

  As shown in FIG. 2, the wiring module 10 includes an insulation protector 15, a plurality of connection bus bars 17 (an example of a bus bar) and a plurality of output bus bars 18 (an example of a bus bar) arranged in the insulation protector 15. .

Insulation protector 15
The insulation protector 15 is made of an insulating synthetic resin. The insulation protector 15 is disposed at the connection bus bar 17 that electrically connects the sets 50 of adjacent power storage elements 11 to each other, and the left end portion and the right end portion of the power storage element group 12, and electrically connects the power storage element group 12 and the external circuit. And an output bus bar 18 to be connected to each other.

  At a position near the rear end of the insulating protector 15, a plurality (three in this embodiment) of connection bus bars 17 (an example of a housing) in which a plurality (three in this embodiment) of connection bus bars 17 are accommodated. ) Is provided. The connection bus bar accommodating portion 19 has a peripheral wall 60 that surrounds the periphery of the connection bus bar 17. The connection bus bar accommodating portion 19 has a substantially rectangular shape elongated in the left-right direction when viewed from above, and is formed in a shape slightly larger than the connection bus bar 17. The connection bus bar accommodating portion 19 has a box shape opening upward.

  An output bus bar housing portion 20 (an example of a housing portion) in which the output bus bar 18 is housed is formed at a position near the rear end portion of the insulating protector 15 and at the left end portion and the right end portion. The output bus bar accommodating portion 20 has a peripheral wall 60 that surrounds the periphery of the output bus bar 18. The output bus bar 18 is bent in an L shape when viewed from above. The output bus bar accommodating portion 20 has a shape corresponding to the output bus bar 18 as viewed from above, and is formed in a shape slightly larger than the output bus bar 18. The output bus bar accommodating portion 20 has a box shape opening upward.

  As shown in FIG. 2, the connection bus bar accommodating portion 19 accommodates the voltage detection terminal 22 on the connection bus bar 17. Further, the output bus bar accommodating portion 20 is accommodated in a state where the voltage detection terminal 22 is superimposed on the output bus bar 18 (see FIG. 1).

Connection bus bar 17
As shown in FIG. 2, the connection bus bar 17 is formed by pressing a metal plate into a predetermined shape. As the metal plate material, any metal such as copper, copper alloy, iron, iron alloy, aluminum, and aluminum alloy can be appropriately selected as necessary. The connection bus bar 17 is elongated in the left-right direction when viewed from above.

  As shown in FIG. 1, the connection bus bar 17 is formed with a plurality of (six in this embodiment) through-holes 23 through which the stud bolts 40 around which threads are formed penetrate the connection bus bar 17. Has been. The through holes 23 are formed in a line in the left-right direction. A nut (not shown) is screwed into the stud bolt 40 in a state where the stud bolt 40 is passed through the through hole 23, and the connection bus bar 17 is sandwiched between the nut and the electrode terminal 14. The connection bus bar 17 is electrically connected.

  With the above configuration, a set 50 of power storage elements 11 composed of three power storage elements 11 connected in parallel and a power storage element composed of three power storage elements 11 adjacent to the set of power storage elements 11 and connected in parallel 11 sets 50 are connected in series by a connection bus bar 17.

Output bus bar 18
As shown in FIG. 1, a plurality of (three in this embodiment) through holes 29 through which the stud bolts 40 are inserted are connected to the output bus bar 18 through the output bus bar 18. An external terminal 25 to which a power line that electrically connects the external circuit and the storage element group 12 is connected is formed at an end of the output bus bar 18 that is bent forward. The external terminal 25 is formed in a bar shape protruding upward from the output bus bar 18.

Voltage detection terminal 22
As shown in FIG. 2, the voltage detection terminal 22 is formed by pressing a metal plate into a predetermined shape. As the metal plate material, any metal such as copper, copper alloy, iron, iron alloy, aluminum, and aluminum alloy can be appropriately selected as necessary.

  A through hole 30 through which the stud bolt 40 is inserted is formed in the voltage detection terminal 22. Since the voltage detection terminal 22 is sandwiched between the nut and the connection bus bar 17 or the output bus bar 18, the voltage detection terminal 22 and the electrode terminal 14 are electrically connected.

  The voltage detection terminal 22 has a barrel portion 27 that is crimped to one end portion of the voltage detection line 16. The other end of the voltage detection line 16 is connected to an external connection device (not shown) such as an ECU (Electronic Control Unit).

  Note that the ECU is equipped with a microcomputer, elements, and the like, and has a function for detecting the voltage, current, temperature, etc. of the power storage elements 11 and controlling the charge / discharge of each power storage element 11. Of the configuration.

Routing unit 28
As shown in FIG. 2, the insulating protector 15 accommodates a plurality of connection bus bar accommodating portions 19 and a plurality of output bus bars accommodated in the rear and rear sides of the plurality of connection bus bar accommodating portions 19 provided on the front side. A wiring portion 28 having a groove shape extending in the left-right direction is formed in front of the row of the portions 20. The voltage detection line 16 is routed in the routing unit 28.

Locking part 57
As shown in FIG. 2, among the peripheral walls 60 of the connection bus bar accommodating portion 19, those located on the front side and those located on the rear side are a pair of opposed walls 60 </ b> A that face each other. The pair of opposing walls 60A is formed to be elongated in the left-right direction.

  Locking portions 57 are provided on the inner surfaces of the pair of opposing walls 60A to elastically lock the connection bus bar 17 and hold the connection bus bar 17 in a state of preventing the connection bus bar 17 from coming off. The locking portion 57 is formed to extend in the vertical direction. The upper end of the locking portion 57 is connected to the opposing wall 60A, and the lower end portion of the locking portion 57 is a free end. The lower end portion of the locking portion 57 elastically contacts the connection bus bar 17 from above, so that the connection bus bar 17 is prevented from coming off from the connection bus bar accommodating portion 19.

Placement unit 53
As shown in FIG. 3, between the pair of opposing walls 60A, a mounting portion 53 extending in the front-rear direction is formed at a position near the lower end of the pair of opposing walls 60A. The placement portion 53 is bridged between the pair of opposing walls 60A. In other words, the front end portion and the rear end portion of the placement portion 53 are respectively connected to the pair of opposing walls 60A. The upper surface of the mounting portion 53 is a mounting surface 54 on which the connection bus bar 17 is mounted.

Reinforcement 55
A reinforcing portion 55 that extends upward is formed at the left end edge of the mounting portion 53 so as to extend in the front-rear direction. The reinforcing portion 55 is bridged between the pair of opposing walls 60A. In other words, the front end portion and the rear end portion of the reinforcing portion 55 are respectively connected to the pair of opposing walls 60A. The mounting portion 53 and the reinforcing portion 55 are substantially L-shaped when viewed from the front-rear direction.

  An upper end portion of the reinforcing portion 55 is a tip portion of the reinforcing portion 55 in a direction away from the placement surface 54. A lower end portion of the locking portion 57 is a tip portion of the locking portion 57 in a direction approaching the placement surface 54. The upper end portion of the reinforcing portion 55 is set so as to be located above the lower end portion of the locking portion 57 (in the direction away from the placement surface).

  The output bus bar accommodating portion 20 also has the same structure as described above, and a duplicate description is omitted.

Bent part 52
As shown in FIG. 3, a bent portion 52 is formed between the plurality of through holes 23 in the connection bus bar 17 and extends in the front-rear direction and extends upward (in a direction intersecting the placement surface). The bent portion 52 has a substantially U shape that opens downward when viewed from the front-rear direction. Thereby, a space extending in the front-rear direction is formed below the bent portion 52. The reinforcing part 55 is located in this space.

As shown in FIG. 4, the thickness dimension L of the bent portion 52 is formed smaller than the thickness dimension M of a portion of the connection bus bar 17 different from the bent portion 52. The ratio of the thickness dimension L of the bent portion 52 to the thickness dimension M of the portion different from the bent portion 52 in the connection bus bar 17 is represented by the following equation.
0.7 ≦ thickness dimension L / thickness dimension M <1

  When the value of the thickness dimension L / thickness dimension M is smaller than 0.7, the electric resistance in the bent portion 52 is increased, which is not preferable. On the other hand, when the value of the thickness dimension L / thickness dimension M includes 1 and is larger than 1, it is not preferable because the bent portion 52 becomes difficult to deform.

  The output bus bar 18 also has the same structure as described above, and a duplicate description is omitted.

Next, the operation and effect of the present embodiment will be described. The present embodiment is a wiring module 10 arranged in a power storage element group 12 in which a plurality of power storage elements 11 having electrode terminals 14 are arranged, and includes a connection bus bar 17 connected to the electrode terminals 14, and a connection bus bar 17. And an insulating protector 15 having a connection bus bar accommodating portion 19 for accommodating the connection bus bar accommodating portion 19, the connection bus bar accommodating portion 19 having a plurality of peripheral walls 60 arranged around the connection bus bar 17, and the plurality of peripheral walls 60 facing each other. A locking portion 57 is provided on at least one inner surface of the pair of facing walls 60A to elastically lock the connection bus bar 17 and hold the connection bus bar 17 in a state of being prevented from coming off. A reinforcing portion 55 is provided between the pair of opposing walls 60A, and the connection bus bar 17 has a bent portion 52 protruding in a direction away from the electrode terminal 14, Strong unit 55 is arranged inside of the bent portion 52.

  According to said structure, since the reinforcement part 55 is spanned between a pair of opposing wall 60A in which the latching | locking part 57 was provided, a pair of opposing wall 60A is the thickness direction of each opposing wall 60A. It can suppress that it expands and deforms. Accordingly, the release of the locking structure between the connection bus bar 17 and the locking portion 57 is suppressed, so that the connection bus bar 17 is prevented from being detached from the connection bus bar accommodating portion 19.

  Moreover, according to this embodiment, the mounting part 53 which has the mounting surface 54 in which the connection bus-bar 17 is mounted is spanned between a pair of opposing wall 60A, and the reinforcement part 55 is mounted. The wiring module according to claim 1, wherein the wiring module is formed to extend in a direction intersecting with the surface and away from the mounting surface.

  According to the above configuration, of the pair of opposing walls 60 </ b> A, the portions located in the direction intersecting with the placement surface 54 of the placement portion 53 and in the direction away from the placement surface 54 are each opposing wall. Expansion and deformation in the thickness direction of 60A is suppressed. Thereby, the area near the connection bus bar 17 in the pair of opposing walls 60A is prevented from being expanded and deformed. As a result, the release of the locking structure between the connection bus bar 17 and the locking portion 57 is suppressed, so that the connection bus bar 17 is reliably suppressed from coming off from the connection bus bar accommodating portion 19.

  Further, according to the present embodiment, the distal end portion of the reinforcing portion 55 in the direction away from the placement surface 54 is placed more than the distal end portion of the locking portion 57 in the direction approaching the placement surface 54. It is arranged at a position separated from the placement surface 54.

  According to said structure, the front-end | tip part of the direction which approaches the mounting surface 54 among the latching | locking parts 57 is suppressed that it expands and deforms about the thickness direction of 60 A of opposing walls. Accordingly, the release of the locking structure between the connection bus bar 17 and the locking portion 57 is suppressed, so that the connection bus bar 17 is reliably suppressed from being detached from the connection bus bar accommodating portion 19.

  Further, according to the present embodiment, the reinforcing portion 55 extends from the side edge of the placement portion 53 in a direction intersecting the placement surface 54.

  According to said structure, the mounting part 53 can also be reinforced.

  Further, according to the present embodiment, the thickness dimension L of the bent portion 52 is set smaller than the thickness dimension M of a portion of the connection bus bar 17 different from the bent portion 52.

  According to said structure, when external force is applied to the electrical storage element 11, it can suppress that stress is added to the connection bus-bar 17 because the bending part 52 bends and deforms.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and for example, the following embodiments are also included in the technical scope of the technology disclosed in the present specification.

(1) In the present embodiment, the connection bus bar 17 is configured to have six through holes 23, but is not limited thereto, and may be configured to have two to five, or seven or more through holes. .

(2) In the present embodiment, the connection bus bar 17 is configured to have the through hole 23. However, the present invention is not limited thereto, and the connection bus bar 17 may be configured to have no through hole. In this case, the connection bus bar 17 and the electrode terminal 14 can be connected by welding, soldering, or the like.

(3) The electric storage element 11 can be a capacitor or a capacitor.

(4) In the present embodiment, the locking portion 57 is provided on both the pair of opposing walls 60A. However, the present invention is not limited to this, and the locking portion 57 is formed on one of the pair of opposing walls 60A. It is good also as a structure.

(5) The number of power storage elements 11 constituting the power storage element group 12 may be arbitrary.

(6) In the present embodiment, the reinforcing portion 55 extends from the edge of the placement portion 53. However, the present invention is not limited to this, and the placement portion 53 and the reinforcement portion 55 may be separate.

(7) The cross-sectional shape of the bent portion 52 may be a C-shape or a rectangular shape that opens downward, and may be an arbitrary shape as necessary.

10: Wiring module 11: Power storage element 12: Power storage element group 14: Electrode terminal 15: Insulation protector 17: Connection bus bar 18: Output bus bar 19: Connection bus bar accommodating part 20: Output bus bar accommodating part 52: Bending part 53: Mounting part 54: Placement surface 55: Reinforcement part 57: Locking part 60: Peripheral wall 60A: Opposing wall

Claims (5)

A wiring module disposed in a power storage element group in which a plurality of power storage elements having electrode terminals are arranged,
A bus bar connected to the electrode terminal;
An insulation protector having an accommodating portion for accommodating the bus bar;
The accommodating portion has a plurality of peripheral walls arranged around the bus bar, the plurality of peripheral walls include a pair of opposing walls, and at least one inner surface of the pair of opposing walls is elastic to the bus bar. Is provided with a locking portion that holds the bus bar in a state of being prevented from coming off.
A reinforcing part is provided between the pair of opposed walls,
The bus bar has a bent portion protruding in a direction away from the electrode terminal,
The wiring module, wherein the reinforcing portion is disposed inside the bent portion. A mounting portion having a mounting surface on which the bus bar is mounted is bridged between the pair of opposing walls,
The wiring module according to claim 1, wherein the reinforcing portion is formed to extend in a direction intersecting with the placement surface and away from the placement surface.   The tip of the reinforcing portion in the direction away from the placement surface is arranged at a position farther from the placement surface than the tip of the locking portion in the direction of approaching the placement surface. The wiring module according to claim 2.   The wiring module according to claim 2, wherein the reinforcing portion extends from a side edge of the mounting portion in a direction intersecting the mounting surface.   The wiring module according to any one of claims 1 to 4, wherein a thickness dimension of the bent portion is set smaller than a thickness dimension of a portion of the bus bar different from the bent portion.

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