JP2024084441A - Bus bar holding member and battery module - Google Patents

Abstract

[Problem] To provide a busbar holding member and a battery module that can stably position a busbar at a predetermined position in a positioning portion. [Solution] A busbar holding member 5 that holds a busbar 30 connected to an exposed conductor 41X that is exposed by stripping off the insulating coating 42 at the tip portion of a coated electric wire 40 having a conductor 41 covered with an insulating coating 42 includes a busbar holding portion 52 for placing the busbar 30, a holding member main body 50 having a harness housing portion 51 that houses the coated electric wire 40 connected to the busbar 30 and has an opening D formed along the parallel direction L of the housed coated electric wire 40, and a cover 60 that closes the opening D, and the cover 60 includes a floating restriction portion 64 that restricts the floating of a connecting busbar 30a placed in the busbar holding portion 52, and a lower protruding wall 63 that restricts rotation of the connecting busbar 30a by abutting against the connecting busbar 30a in the rotation direction. [Selected Figure] Figure 10

Description

This invention relates to, for example, a busbar holding member that holds a busbar connected to a conductor exposed at the end of a coated electric wire, and a battery module equipped with the busbar holding member.

As exemplified in Patent Document 1, a battery module mounted on an electric vehicle or hybrid vehicle is composed of a busbar holding member that holds multiple busbars electrically connected to the tip portions of the coated electric wires, and a battery unit that has multiple batteries connected to the busbars, and can supply power to electronic devices connected to the coated electric wires via the busbars.

The busbar holding member in Patent Document 1 is provided with a placement section in which a busbar connected to a coated electric wire is placed. The busbar placed in the placement section is then connected to the battery of the battery unit. However, for example, if an unintended external force is applied to the busbar, there is a risk that the busbar may be positioned out of its designated position.

JP 2020-136164 A

Therefore, the object of this invention is to provide a busbar holding member and a battery module that can stably position the busbar in a predetermined position in the placement section.

The present invention is a busbar holding member that holds a busbar connected to an exposed conductor that is exposed by stripping off the insulating coating at the tip of a coated electric wire, and is provided with a case having a placement section for placing the busbar, an electric wire housing section that houses the coated electric wire connected to the busbar and has an opening formed along the longitudinal direction of the housed coated electric wire, and a cover that closes the opening, and the cover is characterized in that it is provided with a lift-up restriction section that restricts the lift-up of the busbar placed in the placement section, and a rotation restriction section that restricts the rotation of the busbar by abutting against the busbar in the rotation direction.

The present invention also provides a battery module that includes a plurality of batteries arranged in parallel, a busbar electrically connected to the batteries, a coated electric wire in which the tip side of the insulating coating covering the conductor is peeled off to expose the exposed conductor, and the exposed conductor is electrically connected to the busbar, and a busbar holding member that holds the busbar. The busbar holding member includes a case having a placement section for placing the busbar, and a wire housing section that houses the coated electric wire connected to the busbar and has an opening formed along the longitudinal direction of the housed coated electric wire, and a cover that closes the opening. The cover is characterized in that it includes a lift-up restriction section that restricts the lift-up of the busbar arranged in the placement section, and a rotation restriction section that restricts the rotation of the busbar by abutting against the busbar in the rotation direction.

The cover may be attached to the case along the longitudinal direction, or may be attached to the case along a direction perpendicular to the longitudinal direction.
The floating prevention portion includes a configuration in which, when the cover is attached to the case, it abuts the bus bar or does not abut the bus bar and abuts the bus bar as the bus bar floats up, thereby preventing the bus bar from floating up.

The rotation control portion is not particularly limited as long as it is configured to control the rotation of the busbar by abutting against the busbar, and includes, for example, a configuration that controls the rotation of the busbar by abutting against a part of the busbar, such as an end face of the busbar, or a configuration that controls the rotation of the busbar by engaging or fitting into a hole provided in the busbar.
In addition, when the cover is attached to the case, the rotation control portion may be in contact with the bus bar, or may not be in contact with the bus bar but may come into contact with the bus bar as the bus bar rotates.

According to this invention, by attaching the cover to the case, the lift-up restriction section can restrict the lift-up of the busbar, and the rotation restriction section can restrict the rotation of the busbar. Furthermore, because the lift-up of the busbar can be restricted by the lift-up restriction section, the busbar can be positioned in a position corresponding to the rotation restriction section, achieving more reliable rotation restriction. In this way, since the movement and rotation of the busbar placed in the placement section can be restricted simply by attaching the cover, the busbar can be stably placed in a predetermined position in the placement section even if, for example, an unintended external force is applied. Therefore, the busbar and the battery can be connected reliably and efficiently.

As an aspect of the present invention, the cover may be configured to be attached to the wire accommodating portion in a direction opposite to a floating direction of the bus bar.
According to this invention, the mounting operation of the cover in the direction opposite to the floating direction can prevent the busbar arranged in the arrangement section from floating up. This makes it possible to efficiently regulate the position of the busbar by simply mounting the cover on the case. Therefore, the busbar can be efficiently arranged in a predetermined position with stability.

In another aspect of the present invention, the busbar may be configured in a flat plate shape and include a first busbar body to which the exposed conductor is connected on the main surface on the base end side, a flat second busbar body arranged in parallel with the first busbar body along the longitudinal direction, and a connecting portion connecting the first busbar body and the second busbar body, the arrangement portion having a first arrangement portion for arranging the first busbar body and a second arrangement portion for arranging the second busbar body, the lift-up restricting portion restricts the lift-up of the busbar relative to one of the first busbar body and the second busbar body, and the rotation restricting portion restricts the rotation of the busbar by abutting against the other of the first busbar body and the second busbar body.

According to this invention, the lift-up restriction portion restricts the lift-up of one of the first and second busbar bodies that are separated in the longitudinal direction, while the rotation restriction portion restricts the rotation of the busbar with respect to the other. In this way, by restricting the lift-up and rotation on one and the other sides in the longitudinal direction, the lift-up and rotation can be effectively restricted.

In another aspect of the present invention, the lift-up regulating portion regulates the lift-up of the second busbar body held in the second arrangement portion, and the first busbar body is provided with a protrusion that protrudes in the lift-up direction of the busbar regulated by the lift-up regulating portion, and the rotation regulating portion may regulate the rotation of the busbar by abutting against the protrusion.

According to this invention, the rotation restricting portion abuts against the protrusion, so that the rotation of the busbar can be restricted at a position that does not interfere with the insulated electric wire connected to the first busbar body. Therefore, the busbar can be placed in a predetermined position without interfering with the electrical connection between the busbar and the insulated electric wire.

As an aspect of the present invention, the convex portion is a frame-shaped body provided at an end of the first busbar body on the side of the electric wire accommodating portion, and is formed into a frame shape by a spacing portion provided at a predetermined distance from the first busbar body in the floating direction, and a pair of legs extending from the spacing portion toward the first busbar body, and the rotation control portion may abut against the spacing portion to control the rotation of the busbar.
The rotation restricting portion may abut against one or both of the side of the spaced portion that faces the electric wire housing portion and the side opposite to the electric wire housing portion.

The frame-shaped body formed by a separation portion provided at a predetermined distance from the first busbar body in the above-mentioned levitation direction and a pair of legs extending from the separation portion toward the first busbar body may be formed in a frame shape such as a square U-shape, U-shape, or H-shape in which the extension directions of the separation portion and the legs are different, or in a semicircular, semielliptical, or arc shape in which the separation portion and the legs are continuous, or may be formed in a frame shape with the intersection of a pair of legs inclined toward each other as the separation portion.

With this invention, the rotation of the busbar can be restricted by abutting the separation portion with the rotation restricting portion. That is, the rotation of the busbar can be restricted by abutting the rotation restricting portion provided on the cover with the separation portion at a location close to the electric wire housing portion. Furthermore, since the lift of the busbar is restricted by the lift restricting portion, the rotation restricting portion can be arranged to correspond even in a small area such as the separation portion. Furthermore, the insulated electric wire can be inserted between the pair of legs. Therefore, the rotation of the busbar can be stably restricted without the rotation restricting portion interfering with the insulated electric wire, and the cover can be made compact.

In addition, as an aspect of the present invention, when the case and the cover are attached to each other, a locking and fixing portion for locking and fixing the cover and the wire accommodating portion may be provided between the first arrangement portion and the second arrangement portion.
According to this invention, the cover and the case can be locked and fixed between the lift-up restricting portion and the rotation restricting portion, so that the lift-up restricting portion and the rotation restricting portion can more stably restrict the lift-up and rotation of the busbars.

As a further aspect of the present invention, at least one of the arrangement portion and the lift-up restricting portion may be provided with a biasing portion that biases the arrangement portion toward the bus bar arranged on the arrangement portion.
The biasing portion may have any configuration as long as it has a biasing force toward the bus bar, and may include, for example, an elastic member having an elastic force in the floating direction or the opposite direction, or an elastically deformable sheet material such as gel or sponge attached to a surface of at least one of the arrangement portion and the floating regulation portion that comes into contact with the bus bar. Note that the biasing portion may be integral with or separate from the arrangement portion and the floating regulation portion.

This invention makes it possible to absorb the tolerance between the busbar arranged in the arrangement section and the floating restriction section, so that the floating restriction section can be reliably brought into contact with the busbar when the cover is attached to the case. This makes it possible to more reliably restrict the floating of the busbar, and also to prevent abnormal noise from being generated between the arrangement section and the floating restriction section and the busbar.

As a further aspect of the present invention, the biasing portion may be provided on the arrangement portion.
According to this invention, the biasing portion formed integrally with the arrangement portion can prevent the bus bar from floating up, can reliably prevent the bus bar from rotating, and can reduce the number of parts.

This invention provides a busbar holding member and a battery module that can stably position the busbar at a predetermined position in the placement section.

FIG. 2 is a schematic perspective view of a battery module. FIG. 2 is a schematic exploded perspective view of a battery module. FIG. 1 is an explanatory diagram of a wire with a bus bar. FIG. 1 is an explanatory diagram of a wire with a bus bar. FIG. FIG. FIG. FIG. 4 is an enlarged schematic perspective view of a bus bar holding member that holds an electric wire with a bus bar. FIG. 4 is a schematic plan view of a bus bar holding member that holds an electric wire with a bus bar. FIG. 4 is an explanatory diagram of a bus bar holding member that holds an electric wire with a bus bar.

An embodiment of the present invention will be described below with reference to FIGS.
Fig. 1 shows a schematic perspective view of the battery module 1 as viewed from the upper side HU, and Fig. 2 shows a schematic exploded perspective view of the battery module 1. Figs. 3 and 4 show explanatory views of the busbar-attached electric wires 6, Fig. 5 shows an enlarged schematic perspective view of the tip side LF of the holding member main body 50, Fig. 6 shows an explanatory view of the holding member main body 50, and Fig. 7 shows an explanatory view of the cover 60.

Figures 3, 4, 6, and 7 will be described in detail. Figure 3(a) shows an enlarged schematic perspective view of the tip side LF of the busbar-attached electric wire 6 in which the conductive member 3 and the wire harness 4 are connected, and Figure 3(b) shows a schematic plan view of the connecting busbar 30a to which the branch wire 4b is connected. Figure 4(a) shows a schematic rear view of the connecting busbar 30a to which the branch wire 4b is connected, as viewed along the width direction W from the inside of the width direction W, and Figure 4(b) shows a cross-sectional view taken along the arrows A-A in Figure 3(b).

Figure 6(a) shows a schematic plan view of the tip side LF of the holding member main body 50, and Figure 6(b) shows a cross-sectional view taken along the line B-B in Figure 6(a). Figure 7(a) shows a schematic front view of the tip side LF of the cover 60 as viewed from the right side WR, and Figure 7(b) shows a cross-sectional view taken along the line C-C in Figure 7(a).

Figure 8 shows an enlarged schematic perspective view of the tip side LF of the busbar holding member 5 holding the busbar-attached electric wire 6, and Figure 9 shows an enlarged schematic plan view of the tip side LF of the busbar holding member 5 holding the busbar-attached electric wire 6. Figure 10(a) shows a cross-sectional view taken along the line D-D in Figure 9, and Figure 10(b) shows a cross-sectional view taken along the line E-E in Figure 9.

Here, the up-down direction in FIG. 1 is the height direction H, and the direction in which the multiple battery cells 20 are arranged in parallel in FIG. 1 is the parallel direction L. The height direction H and the parallel direction L are mutually perpendicular. The direction perpendicular to the parallel direction L and the height direction H is the width direction W. In FIG. 1, the left side along the parallel direction L is the tip side LF, the right side in FIG. 1 is the base side LB, the left side along the width direction W is the left side WL, and the right side is the right side WR. In addition, the upper side along the height direction H is the upper side HU, and the lower side is the lower side HD.

As shown in Figures 1 and 2, the battery module 1 is composed of a battery unit 2 in which multiple battery cells 20 are arranged in parallel along the parallel direction L, multiple conductive members 3 electrically connected to the battery cells 20, a wire harness 4 electrically connected to the conductive members 3, and a bus bar holding member 5 that holds the conductive members 3.

As shown in Figures 1 and 2, the battery unit 2 includes a plurality of battery cells 20 arranged in parallel along the parallel direction L. In other words, in the battery unit 2, the battery cells 20 are stacked along the parallel direction L.

The battery cell 20 includes a battery body 21 formed in a flat, generally box-like shape, and a bolt-shaped positive terminal 22 and a negative terminal 23 that protrude from the top surface of the battery body 21 to the upper side HU. The positive terminal 22 and the negative terminal 23 protrude from both ends of the battery body 21 in the width direction W (see FIG. 2).

The battery cells 20 thus configured are stacked along the parallel direction L as described above. More specifically, the multiple battery cells 20 are arranged side by side along the parallel direction L such that the upper surfaces of the battery bodies 21 are flush with one another and the positive terminals 22 and negative terminals 23 of adjacent battery bodies 21 along the parallel direction L are adjacent to one another. In other words, the battery cells 20 are arranged side by side along the parallel direction L such that the positive terminals 22 and negative terminals 23 are alternately oriented in opposite directions (see FIG. 2).

As shown in FIG. 3, multiple conductive members 3 are arranged along the parallel direction L on both sides of the width direction W. The conductive members 3 are composed of a connecting bus bar 30a and two single bus bars 30b arranged at both ends of the parallel direction L on the left side WL. The connecting bus bar 30a and the single bus bar 30b are connected to the positive terminals 22 and negative terminals 23 of the battery cells 20 arranged in parallel, respectively.

The connecting busbar 30a is integrally formed of a first busbar 31, a second busbar 32 having approximately the same shape as the first busbar 31, and a conductor connecting portion 33 that connects the first busbar 31 and the second busbar 32 in the parallel direction L.
On the other hand, the single bus bar 30 b is configured in substantially the same manner as the first bus bar 31 .

As shown in Figures 3(a) and 3(b), the first bus bar 31 is formed by bending a conductive plate material having an appropriate width, and is provided with a first connection portion 311 that is connected to the battery body 21, a first intermediate portion 312, and a conductor connection portion 313 to which the conductor 41 of the coated electric wire 40 described later is connected, in this order from the outside to the inside in the width direction W.

The first connection portion 311 and the conductor connection portion 313 are formed in a flat plate shape. That is, the normal directions of the main surfaces of the first connection portion 311 and the conductor connection portion 313 are both in the height direction H. As shown in FIG. 4(a), the first connection portion 311 and the conductor connection portion 313 formed in such a flat plate shape have the ends of the tip side LF of the first connection portion 311 and the conductor connection portion 313 flush with each other along the width direction W when viewed from the upper side HU. The first connection portion 311 is configured to be longer in the parallel direction L than the conductor connection portion 313.

Furthermore, a protrusion 34 extending to the upper side HU is provided at the inner end of the conductor connection portion 313 in the width direction W.
As shown in Figure 4 (a), the convex portion 34 is arranged at a predetermined distance from the upper surface of the conductor connection portion 313 to the upper side HU, and is formed in a gate shape by an upper extension portion 341 extending along the parallel direction L and a pair of upper legs 342 extending from both sides of the parallel direction L of the upper extension portion 341 to the lower side HD.

The protrusion 34 formed in a gate shape by the upper extension 341 and the pair of upper legs 342 is provided so as to protrude inward in the width direction W and toward the upper side HU from the inner end of the conductor connection part 313 in the width direction W, and is configured so that the conductor 41 of the coated electric wire 40 can be inserted into the internal opening surrounded by the upper extension 341 and the pair of upper legs 342. In other words, a gap is formed between the upper extension 341 and the top surface of the conductor connection part 313, and between the pair of upper legs 342, large enough to insert the branch wire 4b.

The protrusion 34 is integrally formed from the end of the base end side LB of the conductor connection part 313 toward the base end side LB, and is bent toward the upper side HU. Therefore, the thickness of the protrusion 34 in the parallel direction L is formed to be the same as the thickness in the height direction H of the busbar 30.

The first intermediate portion 312 is formed to connect the end of the base end side (inside in the width direction W) of the first connection portion 311 and the end of the tip end side (outside in the width direction W) of the conductor connection portion 313 in the height direction H. The end of the upper side HU of this first intermediate portion 312 corresponds to the length along the parallel direction L of the conductor connection portion 313, and the end of the lower side HD of the first intermediate portion 312 corresponds to the length along the parallel direction L of the first connection portion 311. The lower side HD of the first intermediate portion 312 protrudes toward the base side LB so as to fill the difference in length along the parallel direction L between the end of the lower side HD and the end of the upper side HU of the first intermediate portion 312.

The first bus bar 31 thus configured is formed in a stepped shape with the first connection portion 311, the first intermediate portion 312, and the conductor connection portion 313. The first connection portion 311 has a positive electrode through hole 314 in the center for inserting the positive electrode terminal 22 therethrough.

As shown in FIG. 4(a), the second bus bar 32 is formed substantially symmetrically with the first bus bar 31, with a plane along the width direction W and the height direction H as the plane of symmetry. That is, the second bus bar 32 has a second connection portion 321 connected to the battery body 21, a second intermediate portion 322, and a placement portion 323 arranged in this order from the outside to the inside in the width direction W.

The second connecting part 321 and the placed part 323 are formed in a planar plate shape of approximately the same shape. That is, the normal directions of the main surfaces of the second connecting part 321 and the placed part 323 are both in the height direction H. As shown in FIG. 4(a), the second connecting part 321 and the placed part 323 formed in a planar plate shape have ends of the base end side LB of the second connecting part 321 and the placed part 323 flush with each other along the width direction W when viewed from the upper side HU. The second connecting part 321 is configured to be longer in the parallel direction L than the placed part 323.

The second intermediate portion 322 is formed to connect the end portion on the base end side (inside in the width direction W) of the second connecting portion 321 and the end portion on the tip end side (outside in the width direction W) of the placed portion 323 in the height direction H. The end portion on the upper side HU of this second intermediate portion 322 corresponds to the length along the parallel direction L of the placed portion 323, and the end portion on the lower side HD of the second intermediate portion 322 corresponds to the length along the parallel direction L of the second connecting portion 321. The lower side HD of the second intermediate portion 322 protrudes toward the tip side LF so as to fill the difference in length along the parallel direction L between the end portions of the lower side HD and upper side HU of the second intermediate portion 322.

The second bus bar 32 thus configured is formed in a stepped shape with the second connection portion 321, the second intermediate portion 322, and the placement portion 323. The second connection portion 321 has a negative electrode through hole 324 in the center for inserting the negative electrode terminal 23 therethrough.

The conductor connection portion 313 of the first bus bar 31 and the placement portion 323 of the second bus bar 32 are connected by a substantially flat conductor connection portion 33 having a normal line along the height direction H, as shown in FIG. 4(b). Note that in this embodiment, the conductor connection portion 33 is formed in a substantially flat plate shape, but is not limited to this shape, and may be formed in a substantially U-shape recessed toward the lower side HD when viewed from the width direction W.

As described above, the single bus bar 30b is configured in substantially the same manner as the first bus bar 31. The single bus bar 30b arranged on the tip side LF is arranged to be paired with the first bus bar 31 in the connecting bus bar 30a arranged on the right side WR, so that the positive electrode through hole 314 in the single bus bar 30b is connected to the negative electrode terminal 23.

Similarly, the single bus bar 30b arranged on the base end side LB is arranged to pair with the second bus bar 32 in the connecting bus bar 30a arranged on the right side WR, and therefore the positive electrode through hole 314 in the single bus bar 30b is connected to the positive electrode terminal 22.
Hereinafter, when the coupling bus bar 30a and the single bus bar 30b are collectively described, they will be referred to as bus bar 30.

The negative terminal 23 and the positive terminal 22 may be inserted through the positive through hole 314 and the negative through hole 324 in the connecting bus bar 30a, respectively, in accordance with the arrangement of the battery cells 20. In this case, the terminal connected to the positive through hole 314 in the single bus bar 30b is also changed as appropriate.

As shown in FIG. 3, the wire harness 4 includes a trunk 4a formed by bundling a plurality of covered electric wires 40, and a plurality of branch wires 4b each formed by each covered electric wire 40 branching off from the trunk 4a.
The coated electric wire 40 is composed of a conductor 41 disposed at the center and an insulating coating 42 that covers the outside of the conductor 41. A part of the insulating coating 42 is peeled off from the tip of the coated electric wire 40, so that the conductor 41 is exposed. This exposed conductor 41 is referred to as an exposed conductor 41X.

The exposed conductor 41X thus exposed is arranged along the width direction W at the conductor connection portion 313 of the first busbar 31, as shown in Figures 3 and 4 (b), and the conductor connection portion 313 and the conductor 41 are welded to each other to form the busbar-attached electric wire 6.
The conductor 41 may be welded to the conductor connection portion 313 by any appropriate welding method such as ultrasonic welding, vibration welding, or laser welding.

The busbar holding member 5 has a holding member body 50 that includes a pair of harness housings 51 arranged side by side in the width direction W and a plurality of busbar holding portions 52 that extend outward in the width direction W from the harness housings 51, and a cover 60 that covers an opening D provided above the harness housings 51 (see FIG. 2).

The harness housing 51 can house the main wire 4a along the parallel direction L, and as shown in FIG. 5, is composed of a flat bottom 511 extending along the parallel direction L, an inner wall 512 erected from the inside of the width direction W of the bottom 511 toward the upper HU, and an outer wall 513 erected from the outside of the width direction W of the bottom 511 toward the upper HU. That is, the harness housing 51 is formed in a cross-sectional concave shape with an opening D that opens to the upper HU along the parallel direction L, and a housing space is formed to house the main wire 4a of the wire harness 4 in which the coated electric wires 40 are bundled.

As shown in Figs. 5 and 6(a), the outer wall portion 513 arranged on the outside in the width direction W has a plurality of insertion openings 53 at predetermined intervals in the parallel direction L through which the branch lines 4b branching from the main line 4a can be inserted, and a locking frame 54 that locks and fixes the cover 60 is provided at a predetermined position. In other words, the outer wall portion 513 is divided by the insertion openings 53 provided at predetermined intervals in the parallel direction L.

As shown in Figs. 5 and 6(b), the insertion openings 53 are formed by penetrating the outer wall portion 513 from the upper end to the lower end in the plate thickness direction (width direction W), and are configured to allow the branch wires 4b (coated electric wires 40) branching off from the trunk wire 4a housed in the housing space to be inserted. In addition, the distance between adjacent insertion openings 53 in the parallel direction L is equal to twice the distance between the positive terminals 22 and the adjacent negative terminals 23 of the battery cells 20 arranged in parallel in the parallel direction L.

As shown in FIG. 6(a), the locking frame 54 is a frame-shaped body that is substantially rectangular when viewed from the height direction H, and is composed of a pair of extension parts 541 that extend outward in the width direction W from the outer wall part 513, and a locking connecting part 542 that connects the outer ends of the pair of extension parts 541 in the width direction W.

The locking connection portion 542 that connects the pair of extension portions 541 is configured in a concave shape with an open lower side HD when viewed from the width direction W, as shown in FIG. 5(a). In other words, the locking connection portion 542 connects the upper end portions of the extension portions 541 along the parallel direction L. The extension portion 541 provided on the tip side LF forms the insertion opening 53.

The harness housings 51 configured in this manner are arranged in parallel in the width direction W with the insertion openings 53 facing outward in the width direction W. Here, the insertion opening 53 provided in the harness housing 51 (referred to as harness housing 51L) arranged on the left side WL and the insertion opening 53 provided in the harness housing 51 (referred to as harness housing 51R) arranged on the right side WR are offset from each other by the distance between the positive terminal 22 and the adjacent negative terminal 23 of the battery cell 20. In addition, end communication openings 55 are separately provided at both ends of the harness housing 51L in the parallel direction L, penetrating the outer wall portions 513 provided on the outside of the width direction W.

The harness housings 51 arranged in parallel in the width direction W are connected to each other at both ends in the parallel direction L and at predetermined locations in the center of the parallel direction L. A harness insertion hole is provided at the connection portion connecting the tip sides LF of the harness housings 51 to insert the main line 4a housed in the housing space.

As shown in Figs. 5 and 6, the busbar holding portion 52 is composed of a first arrangement portion 521 in which the conductor connecting portion 313 of the first busbar 31 is arranged, and a second arrangement portion 522 in which the arranged portion 323 of the second busbar 32 is arranged. The first arrangement portion 521 and the second arrangement portion 522 are arranged along the parallel direction L, separated by a length along the parallel direction L of the conductor connecting portion 33.

The first arrangement portion 521 extends outward in the width direction W from the bottom portion 511 at the position where the insertion opening 53 is provided. The length in the width direction W of this first arrangement portion 521 is approximately equal to the length in the width direction W of the conductor connection portion 313, and the outer end in the width direction W protrudes slightly toward the lower side HD.

The second placement portion 522 is configured in a generally plate-like shape that extends outward in the width direction W from the underside of the outer wall portion 513 at the base end side LB of the locking frame 54. The length in the width direction W of this second placement portion 522 is generally equal to the length in the width direction W of the placement portion 323. In addition, the second placement portion 522 has a through hole 56 that penetrates in the height direction H at the center part in the width direction W.

The second arrangement portion 522 having the through hole 56 thus provided therein is provided with a biasing portion 57 extending from the outer side in the width direction W toward the through hole 56 along the width direction W.
More specifically, the urging portion 57 is an elastic piece extending from the inner circumferential surface of the second arrangement portion 522 that forms the through hole 56, and is formed so as to incline toward the upper side HU on which the arrangement portion 323 is arranged as it moves inward in the width direction W. In addition, the tip portion of the urging portion 57 is arranged at a position corresponding to the central portion of the through hole 56 in the width direction W. Therefore, the urging portion 57 exerts a urging force when an external force acts along the height direction H.

In addition, at a position corresponding to the end communication port 55 provided at both ends in the parallel direction L on the left side WL of the harness accommodating portion 51, only a first arrangement portion 521 is provided instead of the bus bar holding portion 52.
The holding member main body 50 configured in this manner can accommodate the trunk wire 4a in the harness accommodating portion 51, can insert the branch wire 4b into the insertion opening 53, and can further accommodate the conductor connecting portion 313 and the disposed portion 323 in the bus bar holding portion 52. In other words, the holding member main body 50 can hold the conductive member 3.

The cover 60 can cover the opening D by being fitted over and engaged with a pair of harness housings 51 in the holding member main body 50 (see FIG. 2). The cover 60 includes a cover main body 61 formed in a circular rectangular shape with a central portion penetrating in the height direction H in a plan view, and a locking portion 62 extending from the outer end of the cover main body 61 in the width direction W toward the lower side HD, a lower protruding wall 63, and a floating restriction portion 64 (see FIG. 7(a) and FIG. 7(b)).

As shown in Figs. 7(a) and 7(b), the locking portion 62 is composed of a substantially flat insertion plate 621 extending from the end of the cover body 61 in the width direction W to the lower side HD at a position corresponding to the locking frame 54 when the holding member body 50 is attached, and a locking protrusion 622 protruding outward in the width direction W from the center of the insertion plate 621 in the parallel direction L. When the cover 60 is in a state where the opening D is closed, the locking portion 62 configured in this manner is inserted between the outer wall portion 513 and the locking connection portion 542, and the locking protrusion 622 locks with the end of the locking connection portion 542 on the lower side HD. This allows the cover 60 and the holding member body 50 to be locked and fixed.

The lower protruding wall 63 protrudes toward the lower HD from a position corresponding to the insertion opening 53 in the cover body 61 at a position corresponding to the insertion opening 53 when the holding member body 50 is attached, and is positioned so as to block the upper HU of the insertion opening 53 when the locking portion 62 and the locking frame 54 are locked and fixed to close the opening D with the cover 60.

More specifically, the lower protruding wall 63 is a flat plate extending from the outer end of the cover body 61 in the width direction W toward the lower side HD. The length of this lower protruding wall 63 in the height direction H is approximately two-thirds of the height (length in the height direction H) of the insertion opening 53. Therefore, when the locking portion 62 and the locking frame 54 are locked and fixed to close the opening D with the cover 60, a gap larger than the outer diameter of the branch wire 4b is formed between the lower protruding wall 63 and the first arrangement portion 521.

As shown in Figures 7(a) and 7(b), the floating restriction portion 64 protrudes from the cover main body 61 toward the lower HD at a position corresponding to the second arrangement portion 522 when attached to the holding member main body 50.
7B, the floating restriction portion 64 is composed of a base portion 641 extending downward from the outer side in the width direction W of the cover main body 61, and a support portion 642 inclined toward the outer side in the width direction W as it extends from the base portion 641 toward the lower side HD. The floating restriction portion 64 is disposed opposite the second placement portion 522 at a position corresponding to the locking frame 54 in the attached state with the holding member main body 50, with a lower surface portion 643 of the support portion 642 spaced apart from the second placement portion 522 by a distance substantially equal to the plate thickness of the placement portion 323.

In this way, the busbar holding member 5 and the busbar-attached electric wire 6, which are composed of the holding member main body 50 and the cover 60, can be stored in the holding member main body 50 by storing the main wire 4a in the harness storage section 51 through the opening D, inserting the branch wire 4b into the insertion opening 53, and arranging the conductor connection section 313 and the placed section 323 in the first arrangement section 521 and the second arrangement section 522. Then, with the busbar-attached electric wire 6 stored in the holding member main body 50, the cover 60 can be moved from the upper side HU to the lower side HD so as to close the opening D, and the locking frame 54 and the locking section 62 can be locked and fixed to form the harness-attached holding member 7 (see FIG. 8).

When the cover 60 is attached to the holding member main body 50, as shown in Figs. 8 and 9, the lower protruding wall 63 is positioned at a position corresponding to the conductor connection portion 313, and the floating restriction portion 64 is positioned at a position corresponding to the placement portion 323. More specifically, as shown in Fig. 10(a), the floating restriction portion 64 is positioned so that the lower surface portion 643 abuts against the upper surface of the placement portion 323 arranged in the second placement portion 522. This makes it possible to prevent the bus bar 30 arranged in the bus bar holding portion 52 from floating up in the height direction H.

In addition, by moving the cover 60 toward the lower HD, the opening D of the harness housing 51 can be blocked while the lower surface portion 643 abuts against the placement portion 323, so that the position of the connecting busbar 30a can be efficiently regulated.

The second arrangement portion 522 in which the placed portion 323 is placed is provided with the biasing portion 57. Therefore, even if there is a tolerance between the second arrangement portion 522 and the floating restriction portion 64 when the cover 60 is attached to the harness housing portion 51, the biasing portion 57 can absorb the intersection between the placed portion 323 placed in the second arrangement portion 522 and the floating restriction portion 64, and can reliably abut the lower surface portion 643 against the placed portion 323. Therefore, the floating of the bus bar 30 can be more reliably restricted, and abnormal noise can be prevented from occurring between the bus bar holding portion 52 and the floating restriction portion 64 and the bus bar 30.

In addition, when the cover 60 is attached to the holding member main body 50, as shown in FIG. 10(b), the lower protruding wall 63 abuts against the conductor connection portion 313 arranged in the first arrangement portion 521. More specifically, the lower protruding wall 63 abuts against the inner surface in the width direction W of the upper leg portion 342 provided on the upper side HU of the conductor connection portion 313. This makes it possible to restrict, for example, the first busbar 31 from pivoting toward the inside in the width direction W around the abutment portion between the floating restriction portion 64 and the busbar 30 as the pivot center. As a result, the busbar holding member 5 that stores the busbar-attached electric wire 6 can restrict the floating of the busbar 30 with the floating restriction portion 64 and restrict the rotation of the busbar 30 with the lower protruding wall 63 by attaching the cover 60 to the harness accommodating portion 51.

The busbar holding member 5 holds the busbar 30 connected to the exposed conductor 41X that is exposed by stripping off the insulating coating 42 at the tip of the insulated electric wire 40, which has the conductor 41 covered with the insulating coating 42. The busbar holding member 5 includes a busbar holding portion 52 for arranging the busbar 30, a harness housing portion 51 for housing the insulated electric wire 40 connected to the busbar 30, and an opening D formed along the parallel direction L of the housed insulated electric wire 40, and a cover 60 for closing the opening D. The cover 60 includes a lift-up restriction portion 64 for restricting the lift-up of the connecting busbar 30a arranged in the busbar holding portion 52, and a lower protruding wall 63 for restricting the rotation of the connecting busbar 30a by rotating it in the same direction as the connecting busbar 30a.

The battery module 1 includes a plurality of battery cells 20 arranged in parallel, a bus bar 30 electrically connected to the battery cells 20, a coated electric wire 40 in which the tip side of the insulating coating 42 covering the conductor 41 is peeled off to expose the exposed conductor 41X, which is electrically connected to the bus bar 30, and a bus bar holding member 5 that holds the bus bar 30. The bus bar holding member 5 includes a bus bar holding portion 52 in which the bus bar 30 is arranged, a holding member main body 50 having a harness housing portion 51 that houses the coated electric wire 40 connected to the bus bar 30 and has an opening D along the parallel direction L of the housed coated electric wire 40, and a cover 60 that closes the opening D. The cover 60 includes a floating restriction portion 64 that restricts the floating of the connecting bus bar 30a arranged in the bus bar holding portion 52, and a lower protruding wall 63 that restricts the rotation of the connecting bus bar 30a by abutting against the connecting bus bar 30a in the rotation direction.

By attaching the cover 60 to the holding member main body 50, the lifting of the connecting bus bar 30a can be restricted by the lifting restriction portion 64, and the rotation of the connecting bus bar 30a can be restricted by the lower protruding wall 63. In addition, since the lifting of the connecting bus bar 30a can be restricted by the lifting restriction portion 64, the connecting bus bar 30a (protrusion portion 34) can be arranged at a position corresponding to the lower protruding wall 63, and more reliable rotation restriction can be realized. In this way, since the movement and rotation of the connecting bus bar 30a arranged in the bus bar holding portion 52 can be restricted simply by attaching the cover 60, the connecting bus bar 30a can be stably arranged at a predetermined position in the bus bar holding portion 52 even if an unintended external force is applied, for example. Therefore, the connecting bus bar 30a and the battery cell 20 can be connected reliably and efficiently.

In addition, the cover 60 is configured to be detachable from the harness accommodating section 51 along the floating direction (upper side HU) of the connecting bus bar 30a and along the opposite direction to the floating direction (lower side HD), so that the floating of the connecting bus bar 30a arranged in the bus bar holding section 52 can be restricted as the cover 60 is attached along the lower side HD. This makes it possible to efficiently restrict the position of the connecting bus bar 30a simply by attaching the cover 60 to the holding member main body 50. Therefore, the connecting bus bar 30a can be efficiently and stably arranged in a predetermined position.

Furthermore, the connecting busbar 30a is configured in a flat plate shape and is composed of a first busbar 31 to which an exposed conductor 41X is connected on the main surface on the base end side, a flat second busbar 32 arranged in parallel with the first busbar 31 along the parallel direction L, and a conductor connecting portion 33 that connects the first busbar 31 and the second busbar 32. The busbar holding portion 52 has a first arrangement portion 521 in which the first busbar 31 is arranged and a second arrangement portion 522 in which the second busbar 32 is arranged. The floating restriction portion 64 restricts the floating of the connecting busbar 30a relative to the second busbar 32 of the first busbar 31 and the second busbar 32, and the lower protruding wall 63 restricts the rotation of the connecting busbar 30a by abutting against the first busbar 31 of the first busbar 31 and the second busbar 32.

As a result, the lift-up of the second bus bar 32, which is one of the first bus bar 31 and the second bus bar 32 that are spaced apart in the parallel direction L, is restricted by the lift-up restricting portion 64, and the lower protruding wall 63 restricts the rotation of the connecting bus bar 30a relative to the first bus bar 31. In this way, by restricting the lift-up and rotation on one side and the other side of the parallel direction L, the lift-up and rotation can be effectively restricted.

The lift-up restricting portion 64 restricts the lift-up of the second bus bar 32 held in the second arrangement portion 522, and the first bus bar 31 is provided with a protruding portion 34 that protrudes from the upper HU of the connecting bus bar 30a restricted by the lift-up restricting portion 64, and the lower protruding wall 63 restricts the rotation of the connecting bus bar 30a by abutting against the protruding portion 34.

Because the lower protruding wall 63 abuts against the convex portion 34 in this way, the rotation of the connecting busbar 30a can be restricted at a position that does not interfere with the coated electric wire 40 connected to the first busbar 31. Therefore, the connecting busbar 30a can be positioned at a predetermined position without interfering with the electrical connection between the connecting busbar 30a and the coated electric wire 40.

Furthermore, the protrusion 34 is a frame-shaped body formed by an upper extension 341 provided at the end of the first bus bar 31 on the side of the harness housing 51 and spaced a predetermined distance from the first bus bar 31 relative to the upper HU, and a pair of upper legs 342 extending from the upper extension 341 toward the first bus bar 31, and the lower protruding wall 63 abuts against the upper extension 341 to restrict the rotation of the connecting bus bar 30a.

In this way, the rotation of the connecting bus bar 30a can be restricted by abutting the upper extension 341 and the lower protruding wall 63 provided at a predetermined interval on the first bus bar 31 and the upper HU. That is, the lower protruding wall 63 provided on the cover 60 can be abutted against the upper extension 341 at a location close to the harness housing 51 to restrict the rotation of the connecting bus bar 30a. In addition, since the floating of the connecting bus bar 30a is restricted by the floating restriction portion 64, the lower protruding wall 63 can be reliably positioned in correspondence even in a small range such as the upper extension 341. Furthermore, the covered electric wire 40 can be inserted between the pair of upper legs 342. Therefore, the lower protruding wall 63 can stably restrict the rotation of the connecting bus bar 30a without interfering with the covered electric wire 40, and the cover 60 can be made compact.

Furthermore, in the mounted state in which the holding member main body 50 and the cover 60 are attached, the locking frame 54 and locking portion 62 that lock and fix the cover 60 and the harness housing portion 51 are provided between the first arrangement portion 521 and the second arrangement portion 522, so that the cover 60 and the holding member main body 50 can be locked and fixed between the floating restriction portion 64 and the lower protruding wall 63. This makes it possible to more stably restrict the floating and rotation of the connecting bus bar 30a by the floating restriction portion 64 and the lower protruding wall 63.

In addition, the busbar holding portion 52 is provided with a biasing portion 57 that biases the busbar 30a arranged in the busbar holding portion 52, thereby absorbing the tolerance between the connecting busbar 30a arranged in the busbar holding portion 52 and the floating restriction portion 64. Therefore, when the cover 60 is attached to the holding member main body 50, the floating restriction portion 64 can abut against the connecting busbar 30a, more reliably restricting the floating of the connecting busbar 30a and preventing abnormal noise from occurring between the busbar holding portion 52 and the floating restriction portion 64 and the connecting busbar 30a.

Furthermore, since the biasing portion 57 is provided on the busbar holding portion 52, the biasing portion 57, which is integrally formed with the busbar holding portion 52, can prevent the connecting busbar 30a from lifting up, reliably restrict the rotation of the connecting busbar 30a, and further reduce the number of parts.

In the configuration of the present invention and the correspondence with the above-mentioned embodiment,
The conductor of the present invention corresponds to the conductor 41,
Similarly,
The insulating coating corresponds to the insulating coating 42.
The coated electric wire corresponds to the coated electric wire 40,
The exposed conductor corresponds to the exposed conductor 41X,
The bus bar corresponds to the bus bar 30,
The bus bar holding member corresponds to the bus bar holding member 5,
The arrangement portion corresponds to the bus bar holding portion 52,
The longitudinal direction corresponds to the parallel direction L,
The aperture corresponds to aperture D,
The wire housing corresponds to the harness housing 51,
The case corresponds to the holding member main body 50,
The cover corresponds to the cover 60;
The floating restriction portion corresponds to the floating restriction portion 64,
The rotation restriction portion corresponds to the lower protruding wall 63,
The first bus bar body corresponds to the first bus bar 31,
The second bus bar body corresponds to the second bus bar 32,
The connecting portion corresponds to the conductor connecting portion 33,
The first arrangement portion corresponds to the first arrangement portion 521,
The second arrangement portion corresponds to the second arrangement portion 522,
The protrusion corresponds to the protrusion 34.
The spaced portion corresponds to the upper extending portion 341,
The legs correspond to upper legs 342,
The locking and fixing portion corresponds to the locking frame 54 and the locking portion 62,
The biasing portion corresponds to the biasing portion 57.
The battery corresponds to a battery cell 20,
The battery module corresponds to the battery module 1, but the present invention is not limited to the configuration of the above-mentioned embodiment, and many embodiments can be obtained.

For example, in this embodiment, the connection between the conductor 41 and the conductor connection portion 313 is made by welding, but this may include any state in which the conductors 41 and 313 are bonded with a conductive adhesive, or a portion of the conductor connection portion 313 is crimped and connected to the conductor 41 like an open barrel, as long as they are integrated in a conductive manner.

In addition, in this embodiment, the bus bar 30 is configured in a bifurcated shape with the first bus bar 31 and the second bus bar 32 connected by the conductor connecting portion 33, but it does not necessarily have to be bifurcated and may be configured, for example, with only the first bus bar 31. Note that when it is configured with only the first bus bar 31, it is configured to correspond to the floating restriction portion 64 and restrict the portion to which the exposed conductor 41X is not connected.

In addition, in this embodiment, the cover 60 is configured to be detachable from the holding member main body 50 along the height direction H, but it may be configured to be attached to the holding member main body 50 along the parallel direction L.
Furthermore, in this embodiment, when the cover 60 is attached to the holding member main body 50, the floatation regulating portion 64 abuts against the bus bar 30 arranged in the bus bar holding portion 52, thereby regulating the floating of the bus bar 30. However, the floatation regulating portion 64 may be configured not to abut against the bus bar 30 in the attached state, and when the bus bar 30 floats up, the floatation regulating portion 64 abuts against the bus bar 30, thereby regulating the floating of the bus bar 30.

Furthermore, the lower protruding wall 63 is not particularly limited as long as it is configured to restrict the rotation of the busbar 30 by abutting against the busbar 30. For example, it may be configured to restrict the rotation of the busbar 30 by abutting against a part of the busbar 30, such as the inner end face of the conductor connection part 313 in the width direction W or the end face along the parallel direction L of the conductor connection part 313, or may be configured to restrict the rotation of the busbar 30 by engaging or fitting into a hole provided in the busbar 30.

In addition, when the cover 60 is attached to the holding member main body 50, the lower protruding wall 63 abuts against the bus bar 30 (upper extension portion 341) to restrict the rotation of the bus bar 30. However, it is also possible to configure the lower protruding wall 63 not to abut against the bus bar 30 in the attached state, but to abut against the bus bar 30 as the bus bar 30 rotates.

In addition, in this embodiment, the lower protruding wall 63 abuts against the side of the harness housing 51 in the upper extension portion 341 (the inner side in the width direction W), but it may also be configured to abut against the opposite side of the harness housing 51 (the outer side in the width direction W), or it may be configured to abut against both the side of the harness housing 51 (the inner side in the width direction W) and the opposite side of the harness housing 51 (the outer side in the width direction W).

The frame-shaped body formed by the upper extension 341 provided at a predetermined distance from the first bus bar 31 with respect to the above-mentioned upper HU and a pair of upper legs 342 extending from the upper extension 341 toward the first bus bar 31 may be formed in a frame shape such as a square U-shape, U-shape, or H-shape in which the upper extension 341 and the upper legs 342 extend in different directions, or in a semicircular, semielliptical, or arc shape in which the upper extension 341 and the upper legs 342 are continuous, or may be formed in a frame shape with the intersection of the pair of upper legs 342 inclined toward each other as the upper extension 341.

The biasing portion 57 may have any configuration as long as it has a biasing force directed toward the bus bar 30, and may be, for example, an elastically deformable sheet material such as gel or sponge attached to the surface of at least one of the bus bar holding portion 52 and the floating restriction portion 64 that contacts the bus bar 30.

Furthermore, in this embodiment, the floating restriction portion 64 abuts against the placed portion 323 to restrict the floating of the placed portion 323, and the lower protruding wall 63 abuts against the conductor connection portion 313 (convex portion 34) to restrict the rotation of the busbar 30, but instead of the floating restriction portion 64, a configuration may be provided that restricts the floating of the conductor connection portion 313, and instead of the lower protruding wall 63, a configuration may be provided that abuts against the placed portion 323 to restrict the rotation of the busbar 30.

Furthermore, a configuration may be provided in which the cover 60 abuts only one of the conductor connection portion 313 and the placement portion 323 to restrict lifting and rotation. For example, the conductor connection portion 33 may be formed in a roughly U-shape recessed toward the lower side HD when viewed from the width direction W, and a fitting member may be provided from the cover body 61 to fit into the U-shaped conductor connection portion 33, thereby restricting the lifting of the bus bar 30 and the rotation of the bus bar 30 in a single location.

REFERENCE SIGNS LIST 1 Battery module 5 Bus bar holding member 20 Battery cell 30 Bus bar 31 First bus bar 32 Second bus bar 33 Conductor connecting portion 34 Convex portion 40 Covered electric wire 41 Conductor 41X Exposed conductor 42 Insulating covering 50 Holding member main body 51 Harness housing portion 52 Bus bar holding portion 54 Locking frame 57 Pressing portion 60 Cover 62 Locking portion 63 Lower protruding wall 64 Floating restriction portion 341 Upper extending portion 342 Upper leg portion 521 First arrangement portion 522 Second arrangement portion L Parallel direction D Opening

Claims (9)

A bus bar holding member for holding a bus bar connected to an exposed conductor obtained by stripping an insulating coating from a tip portion of a coated electric wire, the exposed conductor comprising the conductor covered with an insulating coating,
a case including an arrangement section in which the bus bar is arranged, and an electric wire accommodation section in which the insulated electric wire connected to the bus bar is accommodated and in which an opening is formed along a longitudinal direction of the accommodated insulated electric wire;
a cover that covers the opening,
The cover includes:
a lift-up prevention portion that prevents the bus bar arranged in the arrangement portion from lifting up;
a rotation restricting portion that restricts rotation of the bus bar by abutting against the bus bar in the rotation direction. The bus bar holder according to claim 1 , wherein the cover is configured to be attached to the electric wire receiving portion in a direction opposite to a floating direction of the bus bar. the busbar includes a first busbar body configured in a flat plate shape, the exposed conductors being connected to a main surface on a base end side, a second busbar body shaped like a flat plate and arranged in parallel to the first busbar body along the longitudinal direction, and a connecting portion connecting the first busbar body and the second busbar body,
The placement unit is
a first arrangement portion in which the first bus bar body is arranged;
a second arrangement portion in which the second bus bar body is arranged,
the lift-up restricting portion restricts lift-up of the bus bar relative to one of the first bus bar body and the second bus bar body,
The busbar holding member according to claim 1 , wherein the rotation restricting portion restricts rotation of the busbar by coming into contact with the other of the first busbar body and the second busbar body. the lift-up restricting portion restricts lift-up of the second bus bar main body held in the second arrangement portion,
the first bus bar body is provided with a protrusion protruding in a floating direction in which the bus bar is floated up as restricted by the floatation restriction portion,
The bus bar holding member according to claim 3 , wherein the rotation restricting portion restricts rotation of the bus bar by abutting against the protruding portion. The protrusion is
a bus bar body provided at an end portion of the first bus bar body on the wire accommodating portion side,
a separation portion provided at a predetermined distance from the first bus bar main body in the floating direction;
a frame-shaped body formed by a pair of leg portions extending from the separation portion toward the first busbar body,
The bus bar holding member according to claim 4 , wherein the rotation restricting portion restricts rotation of the bus bar by contacting the separating portion. 4. The bus bar holding member according to claim 3, wherein a locking and fixing portion is provided between the first arrangement portion and the second arrangement portion when the case and the cover are attached to each other. At least one of the arrangement portion and the lift-up restricting portion is provided with
The bus bar holding member according to claim 1 or 2, further comprising a biasing portion that biases the bus bar toward the bus bar arranged in the arrangement portion. The bus bar holding member according to claim 7 , wherein the biasing portion is provided on the arrangement portion. A plurality of batteries arranged in parallel;
A bus bar electrically connected to the battery;
a covered electric wire in which a tip side of an insulating coating covering a conductor is peeled off to expose the exposed conductor, the exposed conductor being electrically connected to the bus bar;
a bus bar holding member for holding the bus bar,
The bus bar holding member is
a placement section for placing the bus bar;
a case including an electric wire housing portion that houses the insulated electric wire connected to the bus bar and has an opening formed along a longitudinal direction of the housed insulated electric wire;
a cover that covers the opening,
The cover includes:
a lift-up prevention portion that prevents the bus bar arranged in the arrangement portion from lifting up;
the battery module further comprising a rotation restricting portion that restricts rotation of the bus bar by contacting the bus bar in a rotational direction.

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