JP2018206637A - Busbar module - Google Patents

Abstract

To provide a busbar module capable of being miniaturized.SOLUTION: A busbar module includes an insulating case 20 provided with a wire holding portion 30 which forms a flat shape by sandwiching and holding a plurality of wires 60 by a first holding part 31 on which the plurality of wires 60 are placed while being arranged in a row, the wires transmitting state detection information of a plurality of batteries 50 of a battery module 100 that includes the batteries 50 connected in line, and a second holding part 32 superposed on the first holding part 31.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bus bar module provided with an electric wire holding part 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 of a hybrid vehicle or an electric vehicle.
The battery module holds a plurality of bus bars that connect a plurality of batteries to each other and a plurality of electric wires that transmit battery state detection information such as voltage or temperature of each battery along the wiring direction and covers the bus bars. And a bus bar module having an insulating case.
For example, Patent Literature 1 describes a bus bar module that holds a plurality of electric wires in a groove of an insulating case.

Japanese Patent No. 5933420

  However, in the bus bar module described in Patent Document 1, when a plurality of electric wires overlap with each other in the groove of the insulating case and the height is increased, the electric wires are set in the groove without protruding from the groove. The groove is set deeper so that For this reason, the size of the case has increased, and as a result, it has been difficult to reduce the size of the bus bar module.

  The present invention has been made in view of the above, and an object thereof is to provide a bus bar module that can be miniaturized.

  In order to solve the above-described problems and achieve the object, a bus bar module according to claim 1 of the present invention includes a plurality of electric wires that transmit state detection information of the battery of a battery module in which a plurality of batteries are connected side by side. A flat shape by sandwiching and holding the plurality of electric wires by a first sandwiching portion placed in a state in which the plurality of wires are arranged and a second sandwiching portion superimposed on the first sandwiching portion It has the insulating case provided with the electric wire holding part which makes | forms.

  Further, in the bus bar module according to claim 2 of the present invention, in the above invention, the wire holding portion is a state in which the plurality of wires are arranged in a row in a direction orthogonal to the height direction of the battery module. It is characterized by being sandwiched between.

  The bus bar module according to claim 3 of the present invention is the bus bar module according to the present invention, wherein the first clamping portion has a plurality of first circles having a circular arc cross section in which the plurality of electric wires are arranged in a row. Arc-shaped grooves are formed corresponding to the plurality of electric wires, and the second holding portions are aligned with groove openings of the plurality of first arc-shaped grooves, thereby the plurality of first circles. A plurality of second arcuate grooves having an arcuate cross section for sandwiching the plurality of electric wires along the outer peripheral surface of the electric wires together with the arcuate grooves are formed.

  The bus bar module according to claim 4 of the present invention is the bus bar module of the battery module according to the above invention, wherein the second clamping part is connected to the first clamping part in a state where the second clamping part is overlapped with the first clamping part. The bus bar cover part which covers and is latched by the said bus bar is provided integrally.

  In the bus bar module according to claim 5 of the present invention, in the above invention, the bus bar cover portion is connected to the bus bar in a state where the second holding portion is overlapped with the first holding portion. An electric wire pressing portion that is brought into contact with the terminal portion so as to press the terminal portion of the electric wire toward the bus bar is provided.

  In the bus bar module according to claim 1 of the present invention, the electric wire holding portion of the insulating case holds the electric wires in a state where the plurality of electric wires are arranged in a row between the first holding portion and the second holding portion. Therefore, since a plurality of electric wires can be held in a flat shape, the size can be reduced.

  The bus bar module according to claim 2 of the present invention sandwiches the plurality of electric wires in a row in a direction orthogonal to the height direction of the battery module so that the electric wire holding portion is arranged low. Can be turned upside down.

  In the bus bar module according to claim 3 of the present invention, the plurality of electric wires are sandwiched along the outer peripheral surface of the electric wire by the grooves having an arcuate cross section of the first holding portion and the second holding portion. The wire can be stably held, and the wire holding portion can be set to a thickness sufficient to maintain the strength of the outer diameter width of the wire so that the size can be reduced. Can do.

  The bus bar module according to claim 4 of the present invention covers the bus bar of the battery module and is engaged with the bus bar in a state where the second clamping portion is overlapped with the first clamping portion. Since the bus bar cover part to be stopped is integrally provided, when the second holding part is overlapped with the first holding part to hold the plurality of electric wires, the bus bar is formed by the bus bar cover part. Since it is covered, the bus bar can be easily covered with a cover.

  In the bus bar module according to claim 5 of the present invention, a terminal portion of the electric wire connected to the bus bar is pressed toward the bus bar by the electric wire pressing portion provided in the bus bar cover portion locked to the bus bar. Therefore, even if an external force is applied to the electric wire in the direction of peeling off from the bus bar, the electric wire pressing portion can prevent the electric wire from being peeled off from the bus bar.

FIG. 1 is a perspective view of a battery module incorporating a bus bar module according to an embodiment of the present invention. FIG. 2 is a perspective view of the battery module showing a state in which a plurality of electric wires are placed on the first clamping unit before the second clamping unit is overlaid on the first clamping unit. FIG. 3 is a cross-sectional perspective view of the periphery of the electric wire holding portion in a state where a plurality of electric wires are sandwiched and held. FIG. 4 is an enlarged view of the vicinity of the electric wire holding portion viewed from the direction of the arrow in FIG. FIG. 5 is a cross-sectional view of the vicinity of the electric wire holding portion in a state where a plurality of electric wires are sandwiched and held. FIG. 6 is a cross-sectional view around the locking portion. FIG. 7 is a diagram for explaining a modification of the groove shape of the electric wire holding portion.

  Hereinafter, preferred embodiments of a 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 a bus bar module 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the battery module 100 showing a state in which the plurality of electric wires 60 are placed on the first clamping unit 31 before the second clamping unit 32 is overlaid on the first clamping unit 31. FIG. 3 is a cross-sectional perspective view of the periphery of the electric wire holding portion in a state where a plurality of electric wires 60 are sandwiched and held. FIG. 4 is an enlarged view of the periphery of the electric wire holding unit 30 as viewed from the direction of the arrow in FIG. FIG. 5 is a cross-sectional view of the vicinity of the electric wire holding unit 30 in a state where a plurality of electric wires 60 are sandwiched and held. FIG. 6 is a cross-sectional view around the locking portion 41a. FIG. 7 is a view for explaining a modification of the groove shape of the electric wire holding portion 30.
A bus bar module 1 according to an embodiment of the present invention is incorporated into a battery module 100 in which a plurality of batteries 50 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 50 and a bus bar module 1 including a plurality of bus bars 10 that connect the plurality of batteries 50 in series.

The battery 50 is realized by, for example, a thin plate lithium battery, and a plurality of the batteries 50 are arranged side by side so that the positive electrode and the negative electrode are adjacent to each other.
In this embodiment, an electrode terminal 51 is provided on the upper surface of the battery 50 as shown in FIG.

The bus bar module 1 includes a plurality of bus bars 10 that electrically connect positive and negative terminals of adjacent batteries 50, and a plurality of electric wires that transmit battery 50 state detection information such as voltage or temperature of the batteries 50. And an insulating case 20 that holds the bus bar 10 along the wiring direction.
In this embodiment, as shown in FIG. 1, the bus bar module 1 corresponds to the electrode terminals 51 provided on both ends of the upper surface of the battery 50, and both end positions on the upper surface of each battery 50 and a plurality of batteries. Two are provided along the 50 alignment direction.

  Further, in this embodiment, one end of each of the plurality of electric wires 60 is connected to the bus bar 10 in order to transmit voltage information for measuring the voltage of the battery 50.

Each bus bar 10 is made of a planar plate-like conductive member, and both ends are connected to electrode terminals 51 of adjacent batteries 50 by welding.
More specifically, as shown in FIG. 2 and FIG. 3, the bus bar 10 is a recess 11 in which the periphery of both ends is welded to the upper surface of the electrode terminal 51 of the adjacent battery 50 and the middle portion is recessed.

The concave portion 11 is a portion to which the terminal portion 60a of the electric wire 60 for measuring the voltage of the battery 50 is joined.
More specifically, the electric wires 60 connected to each bus bar 10 are drawn out from the plurality of electric wires 60 held by the electric wire holding portion 30 to the recess 11 of the bus bar 10, and the terminal portion 60 a is placed on the bottom surface 11 a of the recess 11. It is joined.

  Since such a bus bar 10 is welded to the electrode terminals 51 provided at both ends of the upper surface of the battery 50, the bus bars 10 are arranged side by side near the side surfaces of the batteries 50 arranged in a row.

  The insulating case 20 includes an electric wire holding portion 30 that is a portion that holds the plurality of electric wires 60 along the wiring direction, and a plurality of bus bar cover portions 40 that are portions that cover the bus bars 10.

The electric wire holding unit 30 is provided along the wiring direction of the plurality of electric wires 60.
The electric wire holding unit 30 includes a first holding unit 31 on which a plurality of electric wires 60 are placed in a line, a second holding unit 32 that is overlapped with the first holding unit 31, and a second holding unit 31. There is a hinge part 33 that connects the first clamping part 31 and the second clamping part 32 so that the clamping part 32 can be superimposed on the first clamping part 31.

  In the first sandwiching portion 31, a plurality of first arc-shaped grooves 31 a having a circular arc cross section on which a plurality of electric wires 60 are placed in a row are formed corresponding to the plurality of electric wires 60.

  The first arc-shaped groove 31a is a semicircular groove in which the outer peripheral surface of the electric wire 60 is fitted approximately half in the circumferential direction.

Moreover, the 1st clamping part 31 is mounted on the bus-bar 10, as shown to FIG. 4 and FIG.
More specifically, the first clamping unit 31 is placed around the end of the battery 50 on the side opposite to the end of the bus bar 10 and is locked to the bus bar 10 by a locking unit (not shown). It has become so.
For this reason, the first clamping unit 31 covers a part of the bus bar 10.

  The second sandwiching portion 32 is configured such that the plurality of first arc-shaped grooves 31a and the groove openings 31b and 32b are aligned with each other so that the plurality of electric wires 60 are combined 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 arc-shaped groove 32a is a semicircular groove in which the outer peripheral surface of the electric wire 60 is fitted approximately half in the circumferential direction.
For this reason, when the 2nd clamping part 32 is piled up with respect to the 1st clamping part 31, the 1st circular arc-shaped groove | channel 31a and the 2nd circular arc-shaped groove | channel 32a overlap each other groove opening 31b, 32b of the electric wire 60. A hole having an inner diameter substantially equal to the outer diameter is formed.
That is, the electric wire holding unit 30 is configured to hold a plurality of electric wires 60 in a row by holes having an inner diameter substantially equal to the outer diameter of the electric wires 60.

The hinge part 33 is a thin strip-like flexible part, and is provided at a plurality of locations along the longitudinal direction of the electric wire holding part 30.
As shown in FIG. 4, in the state before the second holding part 32 is overlaid on the first holding part 31, the hinge part 33 has the first holding part 31 with the groove openings 31b and 32b facing upward and The second clamping parts 32 are connected in a state of extending substantially straight.

  In addition, the hinge part 33 is bent so that the second holding part 32 makes the groove openings 32 b of the plurality of second arc-shaped grooves 32 a with respect to the first holding part 31. The direction is reversed so as to be superimposed on each of the groove openings 31b of the arc-shaped groove 31a, and the first sandwiching portion 31 can be superimposed.

  The bus bar cover part 40 is provided integrally with the second clamping part 32 and covers a portion exposed from the first clamping part 31 of the bus bar 10.

  The bus bar cover portion 40 is connected to an end portion of the second holding portion 32 superimposed on the first holding portion 31 and directed to the side surface side of the battery 50, and surrounds an end surface of the exposed portion of the bus bar 10. A bus bar edge surface surrounding wall 41 and a bus bar surface covering wall 42 covering the surface of the exposed portion of the bus bar 10 are provided.

The bus bar edge surface enclosing wall 41 is a wall erected along the edge surface of the bus bar surface covering wall 42, and the bus bar 10 is exposed when the second holding part 32 is overlapped with the first holding part 31. It arrange | positions so that the edge surface of a part may be enclosed.
The bus bar edge enclosing wall 41 is provided with two locking portions 41 a that lock the bus bar 10 when the second clamping portion 32 is superimposed on the first clamping portion 31.

The locking portion 41a is a locking projection that protrudes inside the elastic piece 41b formed between the slits cut from the edge surface of the bus bar edge wall 41 and the free end side end of the elastic piece 41b. And a protrusion 41c.
As shown in FIG. 6, such a locking portion 41 a is engaged with the bus bar 10 when the second clamping portion 32 is overlapped with the first clamping portion 31 and the locking projection 41 c is caught on the back surface of the bus bar 10. It comes to stop.

The bus bar surface covering wall 42 is a wall that is disposed to face the exposed surface of the bus bar 10 when the second clamping part 32 is superimposed on the first clamping part 31.
As shown in FIGS. 2, 3, and 5, the bus bar surface covering wall 42 is a terminal portion of the electric wire 60 that is joined to the bus bar 10 in a state where the second clamping portion 32 is superimposed on the first clamping portion 31. An electric wire pressing portion 42a that is in contact with the terminal portion 60a so as to press the 60a toward the bus bar 10 is provided.

  In addition, as for the electric wire pressed to the bus-bar 10 side by the electric wire press part 42a, the terminal part 60a is connected to the bottom face 11a of the recessed part 11 of the bus-bar 10. FIG.

  The electric wire pressing portion 42a can press the terminal portion 60a of the electric wire 60 connected to the bottom surface 11a of the concave portion 11 of the bus bar 10 to the bus bar 10 side in a state where the second holding portion 32 is superimposed on the first holding portion 31. This is a portion protruding at a predetermined position on the inner surface of the bus bar surface covering wall 42.

Thus, when the terminal portion 60a of the electric wire 60 is pressed toward the bus bar 10 by the electric wire pressing portion 42a, the external force in the direction in which the electric wire 60 is peeled off from the bus bar 10 (direction of arrow D in FIG. 5). Even if it is loaded, the electric wire pressing portion 42a prevents the electric wire 60 from being moved in the peeling direction.
In addition, since the electric wire pressing part 42a is provided on the bus bar surface covering wall 41 locked to the bus bar 10 by the locking part 41a, a force that resists an external force in a direction in which the electric wire 60 is peeled off from the bus bar 10 is obtained. It is supposed to be.

Next, a procedure for assembling the bus bar module 1 to the battery module 100 will be described.
First, the operator assembles a plurality of bus bars 10 on the insulating case 20.
In this work, the worker locks the plurality of bus bars 10 to the first clamping part 31 by a locking part (not shown).

When this operation is completed, the first clamping unit 31 is in a state in which the groove openings 31b of the plurality of first arcuate grooves 31a are directed upward.
Moreover, it will be in the state by which the 1st clamping part 31 was mounted in the some bus bar 10, and each bus bar 10 will be in the state by which the part in which the 1st clamping part 31 was mounted was covered with the insulating material.

Next, the operator joins the terminal portion 60 a of each electric wire 60 to each bus bar 10.
By this operation, the terminal portion 60a of each electric wire 60 is joined to the bottom surface 11a of the concave portion 11 of each bus bar 10 by welding.

Next, the operator sets the plurality of electric wires 60 in the first arcuate grooves 31 a of the first clamping unit 31.
With this operation, the plurality of electric wires 60 are held in a state of being arranged in a row at the upper position of the plurality of batteries 50.

  Next, the operator welds each bus bar 10 to each electrode terminal 51 of the battery 50 provided in a line.

Finally, the operator superimposes the second clamping part 32 on the first clamping part 31 and sandwiches and holds the plurality of electric wires 60 by the electric wire holding part 30, thereby assembling the bus bar module 1 to the battery module 100. Complete.
In this work, the operator reverses the second clamping part 32 to the position where it overlaps with the first clamping part 31, and locks the locking part 41 a provided on each bus bar edge surface surrounding wall 41 to each bus bar 10. .
In addition, by overlapping the second clamping part 32 with the first clamping part 31, the bus bar cover part 40 covers the exposed part that is not covered by the first clamping part 31 of each bus bar 10.
Further, by overlapping the second clamping part 32 on the first clamping part 31, the wire pressing part 42 a protruding from the inner surface of the bus bar surface covering wall 42 causes the terminal part 60 a of the electric wire 60 connected to the bus bar 10 to be connected. It contacts so that it may press on the bus-bar 10 side.

  In the bus bar module 1 according to the embodiment of the present invention, the electric wire holding part 30 of the insulating case 20 is sandwiched and held in a state where a plurality of electric wires 60 are arranged in a row by the first holding part 31 and the second holding part 32. By this, since the some electric wire 60 can be hold | maintained by a flat shape, it can reduce in size.

  In addition, the bus bar module 1 according to the embodiment of the present invention sandwiches the electric wire holding unit 30 in a state in which the electric wires 60 are arranged in a row in a direction orthogonal to the height direction of the battery module 100. 100 can be reduced in height.

  Moreover, since the bus bar module 1 according to the embodiment of the present invention sandwiches the plurality of electric wires 60 along the outer peripheral surface of the electric wire 60 by the grooves having the circular arc shape of the first holding portion 31 and the second holding portion 32, Since the plurality of electric wires 60 can be stably held, and the electric wire holding portion 30 can be set to a thickness sufficient to keep the strength to the width of the outer diameter of the electric wires 60, the small size. Can be

  In addition, the bus bar module 1 according to the embodiment of the present invention covers the bus bar 10 of the battery module 100 in a state where the second clamping unit 32 is overlapped with the first clamping unit 31 in the second clamping unit 32, and Since the bus bar cover portion 40 that is locked to the bus bar 10 is integrally provided, when the second holding portion 32 is overlapped with the first holding portion 31 in order to hold the plurality of electric wires 60, the bus bar 10 is Since it is covered with the bus bar cover part 40, the bus bar 10 can be easily covered with the cover.

  In addition, the bus bar module 1 according to the embodiment of the present invention is configured such that the terminal portion 60a of the electric wire 60 connected to the bus bar 10 is connected to the bus bar 10 side by the electric wire pressing portion 42a provided on the bus bar cover portion locked to the bus bar 10. Therefore, even if an external force in a direction to be peeled off from the bus bar 10 is applied to the electric wire 60, the electric wire pressing portion 42a can prevent the electric wire 60 from being peeled off from the bus bar 10.

  In the bus bar module 1 according to the embodiment of the present invention, a plurality of arc-shaped grooves 31a and 32a are formed in each of the first holding part 31 and the second holding part 32, and the groove openings 31b and 32b are overlapped with each other. Although the example in which the plurality of electric wires 60 are arranged and held in a row by holes having an inner diameter substantially equal to the outer diameter of the electric wires 60 formed together is illustrated, the plurality of electric wires 60 can be held in a row. As long as it has a shape, the grooves formed in each of the first sandwiching portion 31 and the second sandwiching portion 32 are not arc-shaped grooves but may have other groove shapes. For example, a groove having a triangular cross section as shown in FIG. 7 may be provided in the first clamping part 31 and the second clamping part 32.

  The invention made by the present inventor has been specifically described based on the above-described embodiments of the invention. However, the present invention is not limited to the above-described embodiments of the invention and does not depart from the gist thereof. Various changes can be made.

DESCRIPTION OF SYMBOLS 1 Busbar module 10 Busbar 11 Recess 11a Bottom surface 20 Insulating case 30 Electric wire holding part 31 First clamping part 31a First arcuate groove 31b Groove opening 32 Second clamping part 32a Second arcuate groove 32b Groove opening 33 Hinge part 40 Busbar Cover part 41 Busbar edge surface enclosing wall 41a Locking part 41b Elastic piece 41c Locking protrusion 42 Busbar surface covering wall 42a Electric wire pressing part 50 Battery 51 Electrode terminal 60 Electric wire 60a Terminal part 100 Battery module

Claims (5)

A plurality of electric wires transmitting battery state detection information of a battery module in which a plurality of batteries are connected side by side; A bus bar module, comprising: an insulating case provided with a wire holding portion that is flattened by sandwiching and holding the plurality of electric wires by a second holding portion that is overlapped with each other. The wire holding part is
The bus bar module according to claim 1, wherein the plurality of electric wires are sandwiched in a row in a direction orthogonal to a height direction of the battery module. The first clamping part is
A plurality of first arc-shaped grooves having a circular arc cross section to be placed in a state where the plurality of electric wires are arranged in one row are formed corresponding to the plurality of electric wires;
The second clamping part is
The groove openings are aligned with each of the plurality of first arc-shaped grooves, so that the plurality of electric wires are sandwiched along the outer peripheral surface of the electric wires together with the plurality of first arc-shaped grooves. The bus bar module according to claim 1, wherein a plurality of second arc-shaped grooves are formed. The second clamping part is
A bus bar cover portion that covers the bus bar of the battery module and is locked to the bus bar is provided integrally with the second clamping portion being superimposed on the first clamping portion. The bus bar module according to claim 1, 2, or 3. The bus bar cover part is
In a state where the second sandwiching portion is overlapped with the first sandwiching portion, an electric wire pressing portion that comes into contact with the terminal portion so as to press the terminal portion of the electric wire connected to the bus bar toward the bus bar. The bus bar module according to claim 4, wherein the bus bar module is provided.

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