JP6978229B2 - Busbar module - Google Patents

Description

The present invention relates to a bus bar module provided with an electric wire holding portion for holding a plurality of electric wires.

Conventionally, a battery module in which a plurality of batteries are connected in series is used as a power source for a hybrid vehicle or an electric vehicle.
The battery module holds a plurality of bus bars for connecting a plurality of batteries to each other and a plurality of electric wires for transmitting battery status detection information such as voltage or temperature of each battery along the wiring direction and covers the bus bar. It has an insulating case and a busbar module with.
For example, Patent Document 1 describes a bus bar module including an insulating case in which a portion for holding a plurality of electric wires and a portion for covering the bus bar are made of separate parts.

Japanese Unexamined Patent Publication No. 2011-60675

However, in the bus bar module described in Patent Document 1, when the work of arranging the electric wire to the bus bar module and the work of connecting the bus bar to the battery are performed in separate steps, the bus bar is connected to the battery in the step of connecting the bus bar to the battery. It is necessary to connect the bus bar to the battery after removing the case that covers the bus, which causes a problem that the work becomes complicated.
On the other hand, when the case that covers the bus bar is removed and the bus bar module is transported from the wire arrangement process to the process of connecting the bus bar to the battery with the bus bar exposed, the bus bar is pulled from the bus bar to the end of the wire joined to the bus bar. There was a problem that the terminal portion of the electric wire was easily peeled off from the bus bar when the force to be removed was applied.

The present invention has been made in view of the above, and the connection portion of the bus bar to the battery can be exposed before the process of connecting the bus bar to the battery, and the electric wire connected to the bus bar can be exposed. It is an object of the present invention to provide a bus bar module capable of preventing the terminal unit from being peeled off from the bus bar.

In order to solve the above-mentioned problems and achieve the object, the bus bar module according to claim 1 of the present invention is a plurality of electric wires for transmitting the state detection information of the battery of the battery module in which a plurality of batteries are connected side by side. It holds, and the plurality of batteries and the connecting portion covering the plurality of bus bars provided with a wire holding portion so is the exposed portion of the plurality of bus bars connecting the plurality of batteries as separate parts A certain electric wire holding portion and an electric wire pressing portion that is integrally provided on the electric wire holding portion and is contacted so as to press the terminal portion of the electric wire connected to each bus bar of the plurality of bus bars toward the bus bar side. , possess an insulating case provided with the wire holding portion includes a first holding portion in which the plurality of electric wires is a part to be mounted, are connected via a hinge portion to said first holding portion, It has a second holding portion that is overlapped with the electric wire setting port of the first holding portion, and the electric wire pressing portion is a wall that is abutted so as to press the terminal portion of the electric wire toward the bus bar side. A locking that is integrally provided on the pressing wall portion and the second holding portion and is locked to the bus bar in the vicinity of the pressing wall portion in a state where the second holding portion is overlapped with the first holding portion. It is characterized by having a part.

Further, in the bus bar module according to claim 2 of the present invention, in the above invention, the electric wire holding portion has the first holding portion and the second holding portion arranging the plurality of electric wires in a row. It is characterized by forming a flat shape by sandwiching and holding it.

The bus bar module according to claim 1 of the present invention is a separate component from the portion that covers the plurality of bus bars so that the connection portion between the wire holding portion and the plurality of bus bars connecting the plurality of batteries is exposed. Moreover, the electric wire pressing portion is integrally provided in the electric wire holding portion, and the terminal portion of the electric wire connected to each bus bar of the plurality of bus bars is pressed toward the bus bar side. Since they are in contact with each other, the connection part between the bus bar and the battery can be exposed before the connection process between the bus bar and the battery, and the terminal part of the electric wire connected to the bus bar is peeled off from the bus bar. It can be prevented.

Further, the bus bar module according to claim 1 of the present invention, the wire pressing portion is engaged with the bus bar in the vicinity of the pressing wall portion in a state where the second holding portion is superimposed on the first holding portion Since it has a locking portion, an external force that is peeled off from the bus bar acts on the terminal portion of the electric wire connected to the bus bar, and even if the pressing wall portion receives this external force, it is in the vicinity of the pressing wall portion. Since the locking portion is locked to the bus bar, the installation interval between the pressing wall portion and the locking portion is shortened, which is generated in the wall connecting the pressing wall portion and the locking portion. Deformation can be suppressed to a small size.
Therefore, the bus bar module can press the terminal portion of the electric wire while ensuring the rigidity by the pressing wall portion.

The bus bar module according to claim 2 of the present invention has a flat shape in which the electric wire holding portion sandwiches and holds the plurality of electric wires in a state where the first holding portion and the second holding portion are arranged in a row. Therefore, miniaturization can be achieved.

FIG. 1 is a perspective view of a battery module incorporating the bus bar module according to the embodiment of the invention. FIG. 2 is a perspective view of the battery module around the electric wire pressing portion of the electric wire holding portion in which the second holding portion is overlapped with the first holding portion. FIG. 3 is a front view of the battery module around the electric wire pressing portion. FIG. 4 is a perspective view of a battery module showing a state in which a plurality of electric wires are placed on the first holding portion before the second holding portion is superposed on the first holding portion. FIG. 5 is a cross-sectional view of the electric wire holding portion and the electric wire pressing portion before superimposing the second holding portion on the first holding portion. FIG. 6 is a cross-sectional view of an electric wire holding portion and an electric wire pressing portion in which the second holding portion is superimposed on the first holding portion.

Hereinafter, preferred embodiments of the bus bar module according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a battery module 100 incorporating the bus bar module 1 according to the embodiment of the invention. FIG. 2 is a perspective view of the battery module 100 around the electric wire pressing portion 40 of the electric wire holding portion 30 in which the second holding portion 32 is superposed on the first holding portion 31. FIG. 3 is a front view of the battery module 100 around the electric wire pressing portion 40. FIG. 4 is a perspective view of the battery module 100 showing a state in which a plurality of electric wires 70 are placed on the first holding portion 31 before the second holding portion 32 is superposed on the first holding portion 31. FIG. 5 is a cross-sectional view of the electric wire holding portion 30 and the electric wire pressing portion 40 before superimposing the second holding portion 32 on the first holding portion 31. FIG. 6 is a cross-sectional view of the electric wire holding portion 30 and the electric wire pressing portion 40 in which the second holding portion 32 is superposed on the first holding portion 31.
The bus bar module 1 according to the embodiment of the present invention is incorporated in a battery module 100 in which a plurality of batteries 60 serving as a power source for a hybrid vehicle or an electric vehicle are connected in series.

The battery module 100 includes a plurality of batteries 60 and a bus bar module 1 including a plurality of bus bars 10 for connecting the plurality of batteries 60 in series.

The battery 60 is realized by, for example, a thin plate-shaped lithium battery, and a plurality of batteries 60 are arranged side by side so that the positive electrode and the negative electrode are adjacent to each other.
In this embodiment, as shown in FIG. 2, the electrode terminal 61 is provided on the upper surface of the battery 60.

The bus bar module 1 includes a plurality of bus bars 10 that electrically connect the positive electrode terminal and the negative electrode terminal of adjacent batteries 60, and a plurality of electric wires that transmit the state detection information of the battery 60 such as the voltage or temperature of the battery 60. It has an insulating case 20 that holds the 70 along the wiring direction.
In this embodiment, as shown in FIG. 1, the bus bar module 1 corresponds to the electrode terminals 61 provided on both ends of the upper surface of the battery 60, and at both ends of the upper surface of each battery 60, and a plurality of batteries. Two are provided along the arrangement direction of 60.

Further, in this embodiment, one end of the plurality of electric wires 70 is connected to the bus bar 10 in order to transmit voltage information for measuring the voltage of the battery 60.

Each bus bar 10 is made of a flat plate-shaped conductive member, and the periphery of both ends thereof is connected to the electrode terminals 61 of the adjacent batteries 60 by welding.
More specifically, as shown in FIGS. 2 and 4, the bus bar 10 is welded to the upper surface of the electrode terminals 61 of the batteries 60 adjacent to each other around both ends, and the intermediate portion is a recess 11.

The recess 11 is a portion to which the terminal portion of the electric wire 70 for measuring the voltage of the battery 60 is joined to the bottom surface 11a.
More specifically, the electric wires 70 connected to each bus bar 10 are drawn out from the plurality of electric wires 70 held by the electric wire holding portion 30 to the recess 11 of the bus bar 10, and the terminal portion 70a is located on the bottom surface 11a of the recess 11. It is joined.

Since such a bus bar 10 is welded to the electrode terminals 61 provided at both ends of the upper surface of the battery 60, the bus bars 10 are arranged side by side near the side surface of the batteries 60 arranged side by side.

The insulating case 20 is integrally provided with the electric wire holding portion 30 which is a portion for holding the plurality of electric wires 70 along the wiring direction, and the electric wire holding portion 30, and is connected to each bus bar 10 of the plurality of bus bars 10. It has an electric wire pressing portion 40 that is brought into contact with the terminal portion 70a of the electric wire 70 so as to press the terminal portion 70a toward the bus bar 10.

The electric wire holding portion 30 is provided along the wiring direction of the plurality of electric wires 70.
The electric wire holding portion 30 includes a first holding portion 31 on which a plurality of electric wires 70 are placed in a row, a second holding portion 32 superposed on the first holding portion 31, and a second. It has a hinge portion 33 for connecting the first holding portion 31 and the second holding portion 32 so that the holding portion 32 can be overlapped with the first holding portion 31.

In the first holding portion 31, a plurality of first arcuate grooves 31a having an arcuate cross section on which a plurality of electric wires 70 are placed in a row are formed corresponding to the plurality of electric wires 70.

The first arcuate groove 31a is a semicircular groove in which the outer peripheral surface of the electric wire 70 is substantially half fitted in the circumferential direction.

Further, the first holding portion 31 is placed on the bus bar 10 as shown in FIGS. 5 and 6.
More specifically, the first holding portion 31 is placed around the end portion on the side opposite to the end portion of the bus bar 10 on the side surface side of the battery 60, and is locked to the bus bar 10 by a locking portion (not shown). It has become so.
Therefore, the first holding portion 31 is attached to the bus bar 10 in a state where the portion to be welded to the electrode terminal 61 of the battery 60 is exposed while covering a part of the bus bar 10.

The second holding portion 32 is formed by aligning the groove openings 31b and 32b with each of the plurality of first arc-shaped grooves 31a, thereby forming a plurality of electric wires 70 together with the plurality of first arc-shaped grooves 31a. A plurality of second arc-shaped grooves 32a sandwiched along the outer peripheral surface are formed.

The second arcuate groove 32a is a semicircular groove in which the outer peripheral surface of the electric wire 70 is substantially half fitted in the circumferential direction.
Therefore, when the second holding portion 32 is overlapped with the first holding portion 31, the first arc-shaped groove 31a and the second arc-shaped groove 32a overlap each other's groove openings 31b and 32b to form the electric wire 70. It is designed to form a hole with an inner diameter that is approximately equal to the outer diameter.
That is, the electric wire holding portion 30 is adapted to hold a plurality of electric wires 70 in a row by means of holes having an inner diameter substantially equal to the outer diameter of the electric wire 70.

The hinge portion 33 is a thin-walled strip-shaped flexible portion, and is provided at a plurality of locations along the longitudinal direction of the electric wire holding portion 30.
As shown in FIG. 5, the hinge portion 33 has the first holding portion 31 and the first holding portion 31 having the groove openings 31b and 32b facing upward in the state before the second holding portion 32 is superposed on the first holding portion 31. The second holding portions 32 are connected in a substantially straight state.

Further, when the hinge portion 33 is bent, the second holding portion 32 makes the groove openings 32b of the plurality of second arcuate grooves 32a with respect to the first holding portion 31 a plurality of first holding portions 31. It is possible to reverse the direction so as to be overlapped with each of the groove openings 31b of the arcuate groove 31a so that the arc-shaped groove 31a is overlapped with the first holding portion 31.

The electric wire pressing portion 40 is so as to project onto the exposed bus bar 10 from the end edge surface 32c located above the exposed bus bar 10 of the second holding portion 32 superimposed on the first holding portion 31. (2) The holding portion 32 is integrally provided.

The electric wire pressing portion 40 is formed on the box-shaped main body portion 41 and the bus bar 10 in which the open end edge surface is in contact with the surface of the bus bar 10 in a state where the second holding portion 32 is overlapped with the first holding portion 31. It has a locking portion 50 to be locked.

The main body 41 has an outer surface 42a flush with the outer surface 32d of the second holding portion 32, and the second holding portion 32 is overlapped with the first holding portion 31 and is arranged to face the bus bar 10. It has a wall 42, a pair of side walls 43, 43 erected at both side ends of the facing wall 42, and a front end wall 44 erected at the front end of the facing wall 42.

The front end wall 44 is a pressing wall portion 44 which is a wall that presses the terminal portion 70a of the electric wire 70 connected to the bus bar 10 toward the bus bar 10.
The pressing wall portion 44 is a wall that is pressed in a direction orthogonal to the terminal portion 70a of the electric wire 70 joined to the bus bar 10, and the arch-shaped electric wire insertion notch portion 44a through which the terminal portion 70a of the electric wire 70 is inserted is formed. It is formed.

The electric wire insertion notch portion 44a is formed so that the curved surface portion abuts along the outer peripheral surface of the electric wire 70.

The pair of side walls 43, 43 has the terminal portion 70a of the electric wire 70 pulled out from the electric wire holding portion 30 into the recess 11 of the bus bar 10 from the side from the electric wire holding portion 30 to the pressing wall portion 44 along the drawing direction of the electric wire 70. It is a wall that surrounds it.

As shown in FIG. 3, the locking portion 50 is projected from the outer surface of each side wall 43 of the pair of side walls 43 of the main body 41 in a direction substantially orthogonal to the outer surface, and then bent toward the lower bus bar 10. It has an arm portion 51 to be formed, and a locking projection 52 provided at the tip of the arm portion 51.

In the locking projection 52, the peripheral portion of the locking projection 52 at the tip of the arm portion 51 is inserted into the locking through hole 12 formed in the bus bar 10 as a hole for inserting the locking portion 50, and the locking projection 52 is inserted into the bus bar. It is locked to the bus bar 10 by being caught on the back surface of the 10.

Since the locking portion 50 is provided on the pair of side walls 43, 43, the locking portion 50 is locked to the bus bar 10 in the vicinity of the terminal portion 70a of the electric wire 70 joined to the bus bar 10.
That is, the locking portion 50 is locked to the bus bar 10 in the vicinity of the pressing wall portion 44 that presses the terminal portion 70a of the electric wire 70.
Therefore, even if an external force that is peeled off from the bus bar 10 acts on the terminal portion 70a of the electric wire 70 joined to the bus bar 10 and the pressing wall portion 44 receives this external force, the locking portion in the vicinity of the pressing wall portion 44 Since the 50 is locked to the bus bar 10, the installation interval between the pressing wall portion 44 and the locking portion 50 is shortened, and the deformation generated in the wall connecting the pressing wall portion 44 and the locking portion 50 is caused. It can be kept small.
As a result, the bus bar module 1 can press the terminal portion 70a of the electric wire 70 while ensuring the rigidity by the pressing wall portion 44.

Next, a procedure for assembling the bus bar module 1 to the battery module 100 will be described.
First, the operator attaches a plurality of bus bars 10 to the insulating case 20.
In this operation, the operator locks a plurality of bus bars 10 to the first holding portion 31 by a locking portion (not shown).

When this work is completed, the first holding portion 31 is in a state where the groove openings 31b of the plurality of first arcuate grooves 31a are directed upward.
Further, by mounting the first holding portion 31 on a plurality of bus bars 10, each bus bar 10 is welded to the electrode terminal 61 of the battery 60 while the portion on which the first holding portion 31 is mounted is covered with an insulating material. The part to be welded is exposed.

Next, the operator joins the terminal portion 70a of each electric wire 70 to each bus bar 10.
By this work, the terminal portion 70a of each electric wire 70 is joined to the bottom surface 11a of the recess 11 of each bus bar 10 by welding.

Next, the operator sets the plurality of electric wires 70 in the first arcuate grooves 31a of the first holding portion 31.
By this operation, the plurality of electric wires 70 are held in a state of being arranged in a row.

Next, the operator superimposes the second holding portion 32 on the first holding portion 31, sandwiches and holds the plurality of electric wires 70 by the electric wire holding portions 30, and thereby arranges the plurality of electric wires 70 to the bus bar module 1. Complete the work.
In this work, the operator inverts the second holding portion 32 to a position where the second holding portion 32 is overlapped with the first holding portion 31, and locks the locking portion 50 provided in each wire pressing portion 40 to each bus bar 10.
As a result, the second holding portion 32 is locked in a state of being overlapped with the first holding portion 31, and the pressing wall portion 44 of each electric wire pressing portion 40 is connected to each bus bar 10 at the terminal portion 70a of the electric wire 70. Is abutted so as to press against the bus bar 10 side.
In the state where the second holding portion 32 is overlapped with the first holding portion 31, each bus bar 10 is in a state where the portion to be welded to the electrode terminal 61 of the battery 60 is left exposed.

For example, when the work up to this point is completed as an electric wire arrangement step to the bus bar module 1, it is necessary to transport the bus bar module 1 to the next step of connecting the bus bar 10 to the battery 60.
In the bus bar module 1 for which the electric wire arrangement process has been completed, a plurality of electric wires 70 are held by the electric wire holding portion 30 of the insulating case 20. Further, in the bus bar module 1, although the portion where each bus bar 10 is welded to the electrode terminal 61 of the battery 60 is exposed, the terminal portion 70a of each electric wire 70 joined to each bus bar 10 is a wire pressing portion. It is in a state of being pressed toward the bus bar 10 by the pressing wall portion 44 of 40.

The operator in the process of connecting the bus bar 10 to the battery 60 welds each bus bar 10 of the bus bar module 1 to each electrode terminal 61 of the batteries 60 provided side by side.
In this work, since the portion of each bus bar 10 to be welded to the electrode terminal 61 of the battery 60 is exposed, the operator can easily weld the bus bar 10 to the electrode terminal 61.

Finally, the operator attaches a cover (not shown) that covers the exposed bus bar 10, and completes the work of assembling the bus bar module 1 to the battery module 100.

The bus bar module 1 according to the embodiment of the present invention has a portion that covers the plurality of bus bars 10 so that the connection portion of the plurality of bus bars 10 to which the wire holding portion 30 connects the plurality of batteries 60 is exposed. It is provided as a separate component, and the electric wire pressing portion 40 is integrally provided in the electric wire holding portion 30, and presses the terminal portion 70a of the electric wire 70 connected to each bus bar 10 of the plurality of bus bars 10 toward the bus bar 10. Therefore, the connection portion of the bus bar 10 with the battery 60 can be exposed before the connection process between the bus bar 10 and the battery 60, and the electric wire 70 connected to the bus bar 10 can be exposed. It is possible to prevent the terminal portion 70a from being peeled off from the bus bar 10.

Further, in the bus bar module 1 according to the embodiment of the present invention, the electric wire pressing portion 40 is locked to the bus bar 10 in the vicinity of the pressing wall portion 44 in a state where the second holding portion 32 is overlapped with the first holding portion 31. Since the locking portion 50 is provided, an external force that is peeled off from the bus bar 10 acts on the terminal portion 70a of the electric wire 70 connected to the bus bar 10, and even if the pressing wall portion 44 receives this external force, the pressing wall portion 44 Since the nearby locking portion 50 is locked to the bus bar 10, the installation interval between the pressing wall portion 44 and the locking portion 50 is shortened, and the wall connecting the pressing wall portion 44 and the locking portion 50 becomes a wall. The deformation that occurs can be kept small.
Therefore, the bus bar module 1 can press the terminal portion 70a of the electric wire 70 while ensuring the rigidity by the pressing wall portion 44.

Further, in the bus bar module 1 according to the embodiment of the present invention, the electric wire holding portion 30 sandwiches and holds a plurality of electric wires 70 in a state where the first holding portion 31 and the second holding portion 32 arrange a plurality of electric wires 70 in a row. Since it has a flat shape, miniaturization can be achieved.

The bus bar module 1 according to the embodiment of the present invention illustrates that the bus bar 10 is connected to the electrode terminal 61 of the battery 60 by welding, but the present invention is not limited to this, and the bus bar and the battery can be connected by other connection structures. It may be connected. For example, the bus bar and the electrode terminal of the battery may be connected by bolting.

Although the invention made by the present inventor has been specifically described above based on the above-mentioned examples of the invention, the present invention is not limited to the above-mentioned examples of the invention and does not deviate from the gist thereof. Can be changed in various ways.

1 Bus bar module 10 Bus bar 10a Connection part 11 Recessed part 11a Bottom surface 12 Locking through hole 20 Insulating case 30 Wire holding part 31 First holding part 31a First arc-shaped groove 31b Groove opening 32 Second holding part 32a Second arc-shaped Groove 32b Groove opening 32c End edge surface 32d Outer surface 33 Hinge part 40 Wire pressing part 41 Main body part 42 Opposing wall 42a Outer surface 43 Side wall 44 Front wall (pressing wall part)
44a Wire insertion notch 50 Locking 51 Arm 52 Locking protrusion 60 Battery 61 Electrode terminal 70 Wire 70a Terminal 100 Battery module

Claims (2)

A battery module in which a plurality of batteries are connected side by side holds a plurality of electric wires for transmitting the state detection information of the batteries, and the connection portions of the plurality of bus bars connecting the plurality of batteries with the plurality of batteries are exposed. a wire holding portion is a separate part from the portion covering the plurality of bus bars to a wire holding portion provided in so that,
An electric wire pressing portion integrally provided on the electric wire holding portion and contacted so as to press the terminal portion of the electric wire connected to each bus bar of the plurality of bus bars toward the bus bar side.
Possess an insulating case provided with,
The wire holding portion is
A first holding portion that serves as a portion on which the plurality of electric wires are placed, and a second holding portion that is connected to the first holding portion via a hinge portion and is overlapped with the wire setting port of the first holding portion. Have,
The electric wire pressing portion is
A pressing wall portion, which is a wall that is abutted so as to press the terminal portion of the electric wire toward the bus bar side, and a pressing wall portion.
A locking portion that is integrally provided on the second holding portion and is locked to the bus bar in the vicinity of the pressing wall portion in a state where the second holding portion is overlapped with the first holding portion.
A busbar module characterized by having. The wire holding portion is
The bus bar module according to claim 1 , wherein the first holding portion and the second holding portion form a flat shape by sandwiching and holding the plurality of electric wires in a state of arranging them in a row.

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