JP6264217B2 - Wiring module - Google Patents

Description

  The present invention relates to a wiring module.

  A battery module for a vehicle in an electric vehicle, a hybrid vehicle, or the like includes a unit cell group in which a plurality of unit cells having positive and negative electrode terminals are arranged. In the unit cell group, electrode terminals having opposite polarities of adjacent unit cells are connected by a bus bar, whereby a plurality of unit cells are electrically connected.

  Here, if the bus bars for connecting the electrode terminals are positioned and attached one by one between the electrode terminals of the unit cell, it takes time for the installation work. Therefore, a predetermined number of bus bars are connected to each electrode terminal of the unit cell. A battery wiring module that can be positioned together is used (see, for example, Patent Document 1).

  The battery wiring module includes a resin protector made of resin provided with a bus bar holding portion for holding the bus bar, and is fixed in a state of being placed on the unit cell group. In addition to the bus bar, there may be detection wires connected to the unit cell connected to the unit cell. A cover is attached to the resin protector to protect these members from external impacts and insulation protection. May be.

JP 2013-37986 A

  If members such as connecting members and detection wires are exposed from the cover covering the resin protector, there is a concern that sufficient insulation cannot be maintained and protection from external impacts may be insufficient. In the case where the cover is composed of a plurality of sub-covers, it is considered that a part of two adjacent sub-covers is used in an overlapping manner.

  However, if two adjacent sub-covers are attached to the resin protector in the wrong order, the sub-cover may be deformed, or the overlapping portion of the two sub-covers may swell and interfere with other members. There is a possibility that the locked state to the resin protector is released under the influence of vibration or the like.

  This invention is completed based on the above situations, Comprising: It aims at providing the wiring module provided with the cover which can be attached without mistake in order.

  The present invention is a wiring module comprising: an insulation protector that holds a member that is attached to a power storage element group in which a plurality of power storage elements are arranged; and a cover that covers the insulation protector, wherein the cover is a plurality of sub-covers On the other hand, the insulating protector is provided with a locking portion for locking the sub-cover, and two adjacent sub-covers are placed on the insulating protector in the order of one sub-cover and the other sub-cover. In this case, the other sub-cover is a wiring module in which a cover portion that closes the locking portion of the one sub-cover is formed.

  In the present invention, two adjacent sub-covers are placed on the insulating protector in the order of one sub-cover and the other sub-cover, and the other sub-cover is provided with a locking portion of one sub-cover. A covering portion for closing is formed. Therefore, in the present invention, when the other sub-cover is put on the insulation protector before the one sub-cover, the cover formed on the other sub-cover closes the locking portion of the one sub-cover, Since the sub-cover cannot be locked to the insulation protector, the plurality of sub-covers can be put on the insulation protector without changing the order. As a result, according to the present invention, it is possible to provide a wiring module including a cover that can be attached without mistake in order.

The present invention may have the following configuration.
The member attached to the power storage element group is a conductive member electrically connected to the power storage element, and the two adjacent sub-covers may be covered with the insulation protector in an overlapping state. Good.
A conductive member such as a bus bar attached to the power storage element group needs not only to be protected from an external impact but also to maintain insulation. Thus, with the above-described configuration, the two adjacent sub-covers are placed in an overlapping state, so that the insulating property of the conductive member can be maintained.

  ADVANTAGE OF THE INVENTION According to this invention, the wiring module provided with the cover which can be attached without mistake in order can be provided.

The top view of the electrical storage module which attached the wiring module of Embodiment 1 Top view of the wiring module with the cover open Partial sectional view taken along line AA in FIG. Plan view of the wiring module when closing the sub cover in the wrong order Partial sectional view taken along line BB in FIG. The partial top view of the wiring module of Embodiment 2 Partial plan view of the wiring module with the cover open Partial sectional view taken along line CC of FIG. Partial plan view of the wiring module when the sub cover is tried to close in the wrong order Partial sectional view taken along line DD in FIG.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
The power storage module M1 formed by attaching the wiring module 10 of the present embodiment to the power storage element group 11 is used as a drive source for a vehicle such as an electric vehicle or a hybrid vehicle. In the drawings, only one member of the plurality of identical members may be given a reference numeral, and the reference numerals may be omitted for other identical members. In the following description, the upper side in FIGS. 3 and 5 is the upper side and the lower side is the lower side.

(Storage element group 11)
The storage element group 11 includes a plurality (six in this embodiment) of storage elements 12. The power storage module M1 according to the present embodiment is formed by arranging two power storage element groups 11 in which three power storage elements 12 are arranged. The two power storage element groups 11 are arranged in the left-right direction in FIG. 1 at a predetermined interval.

  Each of the storage elements 12 constituting the storage element group 11 includes a storage element (not shown) therein. The power storage element 12 includes a flat rectangular parallelepiped main body 12A including a power storage element therein, and a positive electrode terminal 13A and a negative electrode terminal 13B provided on the upper surface of the main body 12A. Each electrode terminal 13 (13 </ b> A, 13 </ b> B) has a shape protruding vertically upward on the upper surface of the main body 12 </ b> A of the electricity storage device 12. The electrode terminal 13 is provided with a screw hole 14 for receiving a fixing bolt.

  Each power storage element 12 constituting each power storage element group 11 is arranged so that each electrode terminal 13 faces in the same direction (upward), and adjacent electrode terminals 13 are adjacent to each other in adjacent power storage elements 12. They are arranged so as to have reverse polarity. The electrode terminals 13 of the power storage elements 12 adjacent on the left and right in FIG. 1 are also arranged so as to have opposite polarities.

(Wiring module 10)
The wiring module 10 of the present embodiment includes an insulation protector 21 that holds a bus bar 40 (an example of a member attached to the electricity storage element group 11) attached to the electricity storage element group 11 in which a plurality of electricity storage elements 12 are arranged, and an insulation protector 21. And a cover 27 to be put on.

(Bus bar 40)
The bus bar 40 is formed by processing a metal material such as copper, a copper alloy, stainless steel (SUS), or aluminum into a predetermined shape. The bus bar 40 has a generally rectangular shape. In the present embodiment, two types of bus bars 40 having different lengths are used. Of the two types of bus bars 40, the longer one is the first bus bar 41 and the shorter one is the second bus bar 42.

  Each bus bar 40 is provided with a through hole 43 through which a shaft portion (not shown) of a fixing bolt for fixing to the electrode terminal 13 is inserted. The shape of the through hole 43 provided in the bus bar 40 is a so-called long hole shape when viewed from above, and is set larger than the screw hole 14 of the electrode terminal 13. Since the through-hole 43 has a shape extending in the longitudinal direction of the bus bar 40, even if the position of the electrode terminal 13 is shifted due to manufacturing tolerances, etc., the fixing bolt of the electrode terminal 13 can be inserted. It can be aligned with the screw hole 14.

  Each bus bar 40 is bridged so as to electrically connect the opposite polarity electrode terminals 13 of the adjacent power storage elements 12. Each bus bar 40 connects the power storage elements 12 constituting the power storage element group 11 to each other in series. The first bus bar 41 is used to electrically connect the electrode terminals 13 of the adjacent power storage elements 12 between the two power storage element groups 11. The second bus bar 42 is used in each power storage element group 11 to electrically connect the electrode terminals 13 of the power storage elements 12 adjacent in the vertical direction in FIG. Each bus bar 40 is used while being held by the insulation protector 21.

(Insulation protector 21)
The insulation protector 21 is formed by processing a synthetic resin material having insulation into a predetermined shape. The insulation protector 21 is formed by connecting two connecting units 22A and 22B arranged side by side as shown in FIG. The left connection unit 22A in FIG. 2 is a first connection unit 22A, and the right connection unit 22B is a second connection unit 22B.

  Each connection unit 22A, 22B is provided with two second bus bar holding portions 32 for holding the second bus bar 42, and each connection unit 22A, 22B is connected to two connection units 22A, 22B. A first bus bar holding portion 23 is provided to hold the first bus bar 41 formed by doing so. Furthermore, the external connection member holding part 34 which hold | maintains the external connection member (not shown) connected with an external apparatus is provided in the edge part (right and left edge part in FIG. 1) of each connection unit 22A, 22B.

  The first bus bar holding portion 23 includes a bottom plate portion (not shown) on which the first bus bar 41 is placed, and a square cylindrical peripheral wall portion 24 surrounding the bottom plate portion. In the first bus bar holding portion 23, the bottom plate portion and the peripheral wall portion 24 are divided into a first connection unit 22A side and a second connection unit 22B side, respectively. Openings (not shown) are provided at both ends of the bottom plate in the longitudinal direction. The opening portion exposes the end portion of the first bus bar 41 from the first bus bar holding portion 23 so as to be in contact with the electrode terminal 13.

  The peripheral wall portion 24 of the first bus bar holding portion 23 includes a pair of side walls 24A and 24B arranged along the longitudinal direction of the first bus bar 41 and a pair of side walls arranged along the short direction of the first bus bar 41. 24C, 24D. A pair of side walls 24A and 24B arranged along the longitudinal direction of the first bus bar 41 is divided into a first connection unit 22A side and a second connection unit 22B side.

  Of the pair of side walls 24A and 24B arranged along the longitudinal direction of the first bus bar 41 in the first bus bar holding portion 23, the side wall 24A arranged on the front side in FIG. 27 is provided.

  In the first bus bar holding portion 23, the cover 27 is locked to the side wall 24 </ b> B arranged on the back side in FIG. 2 among the pair of side walls 24 </ b> A and 24 </ b> B arranged along the longitudinal direction of the first bus bar 41. Four locking holes 25 (an example of a locking portion) are provided. Two locking holes 25 (25A, 25B, 25C, 25D) are provided on each of the first connection unit 22A side and the second connection unit 22B side. The locking holes on the first connection unit 22A side are 25A and 25B, and the locking holes on the second connection unit 22B side are 25C and 25D.

  The second bus bar holding portion 32 includes a bottom plate portion (not shown) on which the second bus bar 42 is placed, and a square cylindrical peripheral wall portion 33 surrounding the bottom plate portion. In the second bus bar holding part 32, openings (not shown) are provided at both ends of the bottom plate part in the longitudinal direction. The opening portion exposes the end portion of the second bus bar 42 from the second bus bar holding portion 32 so as to be in contact with the electrode terminal 13.

  The external connection member holding portion 34 is opened so that the external connection member and the electrode terminal 13 can come into contact with each other, and a peripheral wall portion 35 is provided so as to surround the electrode terminal 13.

  On the inner surface side of the peripheral wall portion 24 of the first bus bar holding portion 23 and on the inner surface side of the peripheral wall portion 33 of the second bus bar holding portion 32, there are restricting protrusions 31 for restricting the bus bars 41 and 42 from floating in the thickness direction. A plurality are provided.

  In the first bus bar holding portion 23, the second bus bar holding portion 32, and the external connection member holding portion 34, the height of the peripheral wall portions 24, 33, and 35 is set so that a tool is used when the wiring module 10 is attached to the power storage element group 11. The bus bar 40 and the electrode terminal 13 are set so as not to contact unnecessarily.

(Cover 27)
The wiring module 10 of the present embodiment includes a cover 27 that is placed on the first bus bar holding portion 23 of the insulation protector 21 (an example of a cover that is placed on the insulation protector).

  The cover 27 has two (a plurality of) sub-covers 28 and 29. Each of the sub-covers 28 and 29 is provided with two locking projections 30 that are locked in the locking holes 25 of the insulating protector 21.

  Of the two sub-covers 28 and 29 connected from the upper end of the side wall 24A in the longitudinal direction of the first bus bar holding portion 23 via the hinge 26, the sub-cover on the first connecting unit 22A side is defined as the first sub-cover 28. The sub cover on the second connecting unit 22B side is referred to as a second sub cover 29.

  The first sub-cover 28 and the second sub-cover 29 are attached to positions adjacent to each other. The second sub-cover 29 (an example of one sub-cover) and the first sub-cover 28 (an example of the other sub-cover) The insulating protector 21 is covered in order. Adjacent two sub-covers 28 and 29 are attached to the insulating protector 21 in a partially overlapping state. Specifically, the left end portion of the second sub cover 29 and the cover portion 28A of the first sub cover 28 overlap each other.

  The first sub-cover 28 is formed with a cover portion 28A that closes the locking hole 25C on the first sub-cover 28 side among the locking holes 25C and 25D for locking the second sub-cover 29. Therefore, when the first sub cover 28 is first put on the first bus bar holding portion 23 (insulation protector 21), the cover portion 28A of the first sub cover 28 is locked to the insulation protector 21 as shown in FIG. It covers over the hole 25C. If an attempt is made to cover the second sub cover 29 in this state, the locking projection 30 </ b> C of the second sub cover 29 interferes with the upper surface of the first sub cover 28, and the second sub cover 29 is against the insulating protector 21. It cannot be locked.

(Mounting method of wiring module 10)
The power storage module M1 of this embodiment is assembled by attaching the wiring module 10 to the power storage element group 11, and then closing the cover 27 (28, 29) of the insulation protector 21. Here, first, a process of attaching the wiring module 10 to the power storage element group 11 will be described.

  The insulation protector 21 is produced by connecting the two connection units 22A and 22B. The second bus bar holding portion 32 holds the second bus bar 42 and the first bus bar holding portion 23 formed by connecting the connecting units 22A and 22B holds the first bus bar 41 so that wiring as shown in FIG. The module 10 is produced.

  Next, the wiring module 10 is placed on the upper surfaces of the two power storage element groups 11 arranged in the left-right direction. At this time, each end of each bus bar 40 of the wiring module 10 is overlaid on each electrode terminal 13 of each power storage element group 11. Each bus bar 40 is bridged between the electrode terminals 13 of a plurality of counter electrodes in the power storage element group 11. Then, alignment between the through hole 43 of the bus bar 40 and the screw hole 14 provided in the electrode terminal 13 is performed (see FIG. 1). The bus bar 40 is fixed in close contact with the electrode terminal 13 by screwing a nut through a shaft portion of a fixing bolt (not shown) into the through hole 43 and the screw hole 14 aligned with each other. By fixing all the bus bars 40 to the electrode terminals 13 using fixing bolts, the storage elements 12 constituting the storage element group 11 are connected in series to each other, and the wiring module 10 is attached to the storage element group 11. It is done.

  Next, the cover 27 is attached to the insulating protector 21. First, after covering the second sub cover 29 on the first bus bar holding portion 23 and fitting the locking protrusions 30C, 30D of the second sub cover 29 into the locking holes 25C, 25D of the insulating protector 21, The first sub cover 28 is placed on the first bus bar holding part 23. At this time, the left end portion of the second sub cover 29 and the cover portion 28A of the first sub cover 28 overlap each other, but the locking protrusions 30C and 30D of the second sub cover 29 have already been locked by the insulating protector 21. Since the first sub cover 28 is locked in the holes 25C and 25D, the first sub cover 28 does not affect the mounting operation of the second sub cover 29. Next, when the locking projections 30A and 30B of the first sub-cover 28 are fitted and locked in the locking holes 25A and 25B of the insulation protector 21, the first sub-cover 28 is locked as shown in FIG. It becomes a state. This completes the operation of attaching the cover 27 to the insulating protector 21 (see FIG. 1).

  Here, if the mounting order of the two sub-covers 28 and 29 is wrong and the first sub-cover 28 is put on the first bus bar holding portion 23 first, as shown in FIG. The cover portion 28 </ b> A covers and overlaps the locking hole 25 </ b> C for locking the second sub-cover 29. In this state, when the second sub-cover 29 is to be put on, the locking projection 30C of the second sub-cover 29 interferes with the upper surface of the first sub-cover 28, and the second sub-cover 29 is attached to the insulating protector 21. It cannot be locked.

(Operation and effect of this embodiment)
In the present embodiment, when the first sub cover 28 is put on the insulating protector 21 before the second sub cover 29, the cover portion 28 </ b> A formed on the first sub cover 28 is locked to the second sub cover 29. Since the hole 25C is blocked and the second sub-cover 29 cannot be locked to the insulating protector 21, the plurality of sub-covers 28 and 29 can be put on the insulating protector 21 without changing the order. As a result, according to the present embodiment, it is possible to provide the wiring module 10 including the cover 27 that can be attached without making a mistake in the order.

  Incidentally, the conductive member such as the bus bar 40 attached to the power storage element group 11 needs not only to be protected from an external impact but also to maintain insulation. According to the present embodiment, since the two sub-covers 28 and 29 covering the bus bar 40 are put on the insulating protector 21 so as to overlap each other, the insulating property of the bus bar 40 can be maintained.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 6 to 10, the present embodiment is different from the first embodiment in that the member attached to the storage element group 11 is an electric wire 61 (an example of a conductive member). The same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The wiring module 50 of this embodiment and the insulation protector 51 holding the electric wire 61 are provided. In the insulation protector 51, the wire holding portion 53 that holds the wire 61 is formed by connecting two connecting units 52A and 52B (see FIGS. 6 and 7).

  The electric wire holding part 53 includes a bottom plate 54C on which the electric wires 61 are placed, and a pair of side walls 54A and 54B that stand up from the bottom plate 54C. In the electric wire holding part 53, the bottom plate 54C and the side walls 54A and 54B are divided into a first connection unit 52A side (left side in the figure) and a second connection unit 52B side (right side in the figure), respectively.

  Of the pair of side walls 54A and 54B of the electric wire holding portion 53, a cover 57 is provided on the side wall 54A arranged on the front side in FIG. The cover 57 has two (a plurality of) sub-covers 58 and 59. Each of the sub-covers 58 and 59 is provided with two locking projections 60 that are locked in the locking holes 55 of the insulating protector 51.

  Of the pair of side walls 54A, 54B of the electric wire holding portion 53, the side wall 54B arranged on the back side in FIG. 7 is a locking hole 55 (55A, 55B, 55C, 55D) (locking) for locking the cover 57. Four examples) are provided. The locking holes on the first connection unit 52A side are 55A and 55B, and the locking holes on the second connection unit 52B side are 55C and 55D.

  Of the two sub-covers 58 and 59 connected from the upper end of the side wall 54A of the wire holding portion 53 via the hinge 56, the sub-cover on the first connecting unit 52A side (left side) is defined as the first sub-cover 58, and the second The sub cover on the connection unit 52B side (right side) is defined as a second sub cover 59 (see FIG. 7).

  The first sub cover 58 and the second sub cover 59 are attached to positions adjacent to each other. The second sub cover 59 (an example of one sub cover) and the first sub cover 58 (an example of the other sub cover) The insulating protector 51 is covered in order. Two adjacent sub-covers 58 and 59 are put on the insulating protector 51 in a partially overlapping state. Specifically, the left end portion of the second sub cover 59 and the cover portion 58A of the first sub cover 58 overlap each other.

  The first sub cover 58 is formed with a cover portion 58A that closes the locking hole 55C on the first sub cover 58 side among the locking holes 55C and 55D for locking the second sub cover 59. Therefore, when the first sub cover 58 of the two sub covers 58 and 59 is first put on the wire holding portion 53 (insulation protector 51), as shown in FIG. 2 Overlies the locking hole 55C for locking the sub-cover 59. If an attempt is made to cover the second sub cover 59 in this state, the locking projection 60 </ b> C of the second sub cover 59 interferes with the upper surface of the first sub cover 58, and the second sub cover 59 is against the insulating protector 51. It cannot be locked.

The operation and effect of this embodiment will be described.
The two connecting units 22A and 22B are connected to form the electric wire holding portion 53, and the electric wire 61 is routed to the electric wire holding portion 53 to assemble the wiring module 50. A cover 57 is attached to the insulation protector 51 placed on the storage element group 11. First, after the second sub cover 59 is put on the electric wire holding portion 53 and the locking projections 60C and 60D of the second sub cover 59 are fitted into the locking holes 55C and 55D of the insulating protector 51, the first The sub cover 58 is put on the electric wire holding portion 53. At this time, the left end of the second sub-cover 59 and the cover 58A of the first sub-cover 58 overlap each other, but the locking protrusions 60C and 60D of the second sub-cover 59 are already at the locking holes of the insulating protector 51. Since the first sub cover 58 is locked to the 55C and 55D, the first sub cover 58 does not affect the mounting operation of the second sub cover 59.

  Next, when the locking protrusions 60A and 60B of the first sub-cover 58 are fitted and locked in the locking holes 55A and 55B of the insulation protector 51, the first sub-cover 58 is locked as shown in FIG. It becomes a state. Thereby, the attaching operation of the cover 57 to the insulating protector 51 is completed (see FIG. 6).

  If the mounting order of the sub-covers 58 and 59 is mistaken and the first sub-cover 58 is first put on the electric wire holding portion 53, the covering portion 58A of the first sub-cover 58 is removed as shown in FIG. Of the two locking holes 55C and 55D that lock the second sub-cover 59, the upper locking hole 55C is overlaid. In this state, when trying to cover the second sub cover 59, the locking projection 60 </ b> C of the second sub cover 59 interferes with the upper surface of the first sub cover 58, and the second sub cover 59 is against the insulating protector 51. Since it cannot be locked, the plurality of sub-covers 58 and 59 can be put on the insulating protector 51 without changing the order. As a result, according to the present embodiment, it is possible to provide the wiring module 50 including the cover 57 that can be attached without mistake in order.

  By the way, when the member attached to the electrical storage element group 11 is a conductive member such as the electric wire 61, it is necessary not only to protect from an external impact but also to maintain insulation. According to the present embodiment, since the two sub covers 58 and 59 covering the electric wire 61 are put on the insulating protector 51 in an overlapping state, the insulating property of the electric wire 61 can be maintained.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiment described with reference to the above description and drawings, and may be the following embodiment, for example.
(1) Although the example of the bus bar 40 and the electric wire 61 is shown as a member attached to the electricity storage element group 11 in the above embodiment, the member attached to the electricity storage element group is a detection terminal or a thermistor that detects the state of the electricity storage element. There may be.
(2) In the above embodiment, the cover 27 covering the first bus bar holding part 23 of the insulation protector 21 and the cover 57 covering the electric wire holding part 53 of the insulation protector 51 have been shown. Is not limited to this.
For example, you may comprise the cover which covers the whole insulation protector by two or more subcovers. Moreover, you may comprise the cover which covers a 2nd bus-bar holding | maintenance part with two or more sub-covers. Note that the number of sub-covers in one wiring module is not limited to two.
(3) In the above embodiment, the insulating protector 21 including the two locking holes 25 for each of the sub-covers 28 and 29 is shown. However, the number of the locking holes may be one or three or more. May be. Further, a locking hole may be provided in the insulating protector by providing a locking hole in the sub cover.

DESCRIPTION OF SYMBOLS 10,50 ... Wiring module 11 ... Power storage element group 12 ... Power storage element 13 ... Electrode terminal 21, 51 ... Insulation protector 22A, 52A ... 1st connection unit 22B, 52B ... 2nd connection unit 23 ... 1st bus-bar holding part 25, 55. Locking hole (locking part)
25A, 25B, 25C, 25D ... Locking hole (locking part)
26, 56 ... Hinge 27, 57 ... Cover 28, 58 ... First sub-cover (the other sub-cover)
28A, 58A ... Cover 29, 59 ... Second sub-cover (one sub-cover)
30, 60 ... Locking protrusions 30A, 30B, 30C, 30A ... Locking protrusions 40 ... Busbar (conductive member)
41 ... 1st bus bar 42 ... 2nd bus bar 43 ... Through-hole 53 ... Electric wire holding part 55 ... Locking hole 55A, 55B, 55C, 55D ... Locking hole (locking part)
60 ... Locking protrusions 60A, 60B, 60C, 60A ... Locking protrusion 61 ... Electric wire (conductive member)
M1 power storage module

Claims (2)

A wiring module comprising: an insulation protector that holds a member attached to a power storage element group in which a plurality of power storage elements are arranged; and a cover that is placed on the insulation protector.
While the cover has a plurality of sub-covers, the insulation protector is provided with a locking portion for locking the sub-cover,
Two adjacent sub-covers are adapted to be put on the insulating protector in the order of one sub-cover and the other sub-cover,
A wiring module in which the other sub-cover is provided with a cover portion that closes the locking portion of the one sub-cover. The member attached to the power storage element group is a conductive member electrically connected to the power storage element,
2. The wiring module according to claim 1, wherein the two adjacent sub-covers are covered with the insulating protector in an overlapping state.

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