KR200485016Y1 - Series connection apparatus of battery module - Google Patents

Abstract

The present invention relates to a serial connection device for a battery module. The skeleton of the present invention is formed by the base 10. A bus bar mounting part 12 and a substrate mounting part 14 are formed on the base 10. A plurality of bus bar mounting parts 16 are formed on the bus bar mounting part 12. A hook base 24 protrudes from both sides of the side wall 22 of the seat base 20 to form a frame of the bus bar seat base 16. A bus bar (30) electrically connected to the battery cell tab and the substrate is seated on the bus bar seating table (16). The bus bar 30 has an engaging plate 32 which is seated on the bus bar seating plate 16 and engages with the battery cell tab. The side plates 34 are formed on both ends of the engaging plate 32 to face each other. A through hole 35 is formed in the side plate 34 at a position corresponding to the hooking jaw 24. A groove portion 26 is formed in a portion of the side wall 22 on which the hooking jaw 24 is formed to enable elastic deformation. The bus bar 30 is made of a conductive metal. According to the present invention, since the bus bar 30 is elastically deformed at the side of the base 10 without plastic deformation during the process of mounting the bus bar 30 to the bus bar seating base 16, So that it can be firmly mounted without flowing.

Description

[0001] The present invention relates to a series connection apparatus for a battery module,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a serial connection device for a battery module, and more particularly, to a serial connection device for a battery module in which the electrodes of adjacent battery cells are sequentially connected to connect the battery cells of all the battery modules in series.

A battery used in an electric vehicle is composed of a plurality of battery modules in order to supply as much power as necessary. The battery module also includes a plurality of battery cells. When the battery cells are connected in series, relatively large power can be supplied. To this end, a device for sequentially connecting the positive electrode and the negative electrode of a plurality of battery cells in one battery pack is a serial connection device.

In the serial connection device, there are a plurality of bus bars electrically connected to the electrodes of the battery cell. As in the prior art document, a plurality of bus bars are welded and fixed to the base. However, there is a problem in that a separate fusing equipment is required for the fusing work and the manufacturing process is increased.

In this case, the inner diameter of the through hole and the outer diameter of the fused protrusion are precisely adjusted to 1: 1. In this case, the fused protrusion protrudes from the base through the through- The relative flow between the bus bar and the base is generated, thereby causing a noise problem.

In order to solve such a problem, studies are being conducted to make a bus bar made of a metal material closely attached to an injection-molded base. However, since the bus bar uses a copper material having good electrical conductivity, the elastic bar is relatively inferior in its ability to accurately fix the bus bar to the base.

Korean Patent No. 10-1329251

It is an object of the present invention to solve the above-mentioned problems and to prevent the bus bar from being elastically deformed in the process of mounting the bus bar in the serial connection device for a battery module.

Another object of the present invention is to prevent a bus bar from being installed in the base of a serial connection device for a battery module so that no flow occurs.

According to an aspect of the present invention for achieving the above object, the present invention provides a serial connection device for a battery module that connects taps of a plurality of battery cells provided in a battery module in series, A base having a plurality of bus bar mounting bases having hooking tails formed on side walls on both sides of the bus bar and being elastically deformed so as to push the hooking jaws therebetween; And a bus bar which is formed of a conductive metal and has a side plate that is bent at both sides in the width direction of the coupling piece and is in close contact with a side wall of the seating part of the bus bar to connect the tabs of the battery cells in series, And a space between the spacing bar and the bus bar seating base, The tab passes.

And a base seating part is formed on the base to share a bus bar seating part formed with the bus bar seating part and one side edge of the bus bar seating part.

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A guide rib is formed at the lower end of the bus bar rest so as to guide the battery cell tab through the bus bar rest and the gap.

The groove portion is formed such that a portion of the side wall on which the hooking jaw is formed is thinner than another portion of the side wall.

The groove portion is formed to extend to the bus bar seat.

According to another aspect of the present invention, the present invention provides a serial connection device for a battery module that connects taps of a plurality of battery cells provided in a battery module in series, the battery module being made of an insulating synthetic resin, And a plurality of bus bar mounts formed on the bus bar mount table and electrically connected to the substrate mounted on one side of the base and connected in series with the tabs of the battery cell, And the bus bar rest is elastically deformed when the bus bar is pushed by the bus bar when the bus bar is mounted on the bus bar rest so that the hook rest is hooked on the through hole of the bus bar.

A guide rib is formed at the lower end of the bus bar rest so that the battery bar tab is guided to pass between the bus bar rest and a gap formed adjacent to the bus bar rest.

Wherein the bus bar includes a coupling piece that is seated on a surface of the bus bar seating part and is electrically connected to a tab of the battery cell and a side plate that is bent at both sides in the width direction of the coupling piece and closely contacted with the side wall of the bus bar seating part, And a through hole is formed in the side plate for hooking the hook.

The following effects can be obtained in the serial connection device for a battery module according to the present invention.

In the present invention, a bus bar made of copper or a copper alloy is not elastically deformed, and the seat back side is elastically deformed. Therefore, the bus bar can be mounted on the seating base of the base in a manufactured state, so that the bus bar is firmly mounted on the outer surface of the seating base.

Further, in the present invention, the hook piece extends in the claw groove direction of the seat in the form of a cantilever, so that the tip of the hook is hooked on the inner surface of one side of the hook groove, . Therefore, there is an effect that the bus bar does not flow to the seat by the vibration or the like generated during use.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an important part of a preferred embodiment of a serial connection device for a battery module according to the present invention; FIG.
2 is an exploded perspective view showing the configuration of the embodiment of the present invention.
Fig. 3 is a cross-sectional perspective view showing a state in which a bus bar is mounted on a mount stand in the present embodiment; Fig.
Fig. 4 is a cross-sectional view showing a state in which a bus bar is mounted on a mount table in the embodiment of the present invention; Fig.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the understanding why the present invention is not conceived.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) can be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

According to the drawings, the base 10 forms the skeleton of the inventive device and is made of an insulating material. The base 10 is mounted on one side constituting the external appearance of a battery pack (not shown). The base 10 has a bus bar mounting portion 12 and a board mounting portion 14. The bus bar seats 12 are mounted with bus bars 30, which will be described below. The substrate seating part 14 is on the opposite side of the base 10 from which the bus bar 30 is seated. The substrate seating portion 14 extends long along the one-way central portion of the base 10. A bus bar seating portion 12 is provided on both sides of the substrate seating portion 14 as a center. The substrate is electrically connected to the bus bar 30 to be described below, and a fuse or a connector for connection with the outside is mounted.

The bus bar seating part 12 is formed at a position corresponding to a tab (not shown) of a plurality of battery cells constituting the battery pack, sharing a side edge with the substrate seating part 14. [ The device of this embodiment is used in that battery cells are arranged in two rows. The bus bar receiving portion 12 is formed with a substantially rectangular plate-shaped bus bar receiving portion 16 and a spacer 18 alternately. A gap is formed between the bus bar seating table 16 and the spacer 18 to allow the tabs of the battery cell to pass through.

The configuration of the bus bar seating base 16 will be described in detail. The seat base (20) forms a skeleton of the bus bar seat (16). The seat base body 20 has a rectangular plate shape. The seat base body connects the edge side wall 19 of the base 10 and the side of the substrate seating portion 14 with each other. Side walls 22 are formed at both ends of the seat base body 20 in the longitudinal direction. And a connecting wall 23 for connecting the side walls 22 on both sides. The connecting wall 23 has a cross shape.

And hooking jaws 24 are formed on both sides of the outer surface of the side wall 22 of the seat base body 20. The hook jaw 24 is a portion where the bus bar 30 is hooked, which will be described below. In this embodiment, a total of four hook jaws 24 are formed. In order to firmly mount the bus bar 30 on the seat base 20, it is necessary that there are at least four hooks 24 on each side wall 22 at least on both sides. Of course, the number of the hooking jaws 24 may vary depending on the length of the bus bar 30.

The portion of the side wall 22 on which the hooking jaw 24 is formed is relatively thin compared to other portions. That is, in this embodiment, as shown in the drawing, a groove portion 26 is formed on the side opposite to the side of the side wall 22 on which the hooking jaw 24 exists. As the groove portion 26 is formed, when the external force is applied to the hooking jaw 24, the corresponding portion of the side wall 22 is elastically deformed.

The groove 26 is formed in the seat cushion body 20 in addition to the side wall 22 as shown in the figure. This is to enable the portion where the hooking jaw 24 is formed to be more elastically deformed. Of course, if the side wall 26 is formed only in the side wall 22, the seating portion 26 may not be formed in the seating base body 20 if the side wall 22 can be elastically deformed as desired.

When the portion of the side wall 22 on which the hooking jaw 24 is formed is elastically deformed, the side of the bus bar 30 to be described below can be attached to the bus bar seating base 16 without being deformed elastically. For example, if the through-hole is formed in the seat base 20 instead of the groove 26, the elastic deformation of the side wall 22 formed with the hook 24 may be more smooth. It may be difficult to ensure the insulation distance between the bus bars 30.

On the other hand, a spacer projection 27 is formed in a portion of the side wall 22 adjacent to the substrate seating portion 14. The spacer projection 27 allows the bus bar 30 to be fixed between the side wall 19 of the base 10 and the outer surface of the substrate seating portion 14 without flowing. Respectively. As shown in Fig.

A guide rib 28 is formed at a position corresponding to the lower end of the seat base 20 in the drawing. The guide ribs 28 extend along the lower ends of the seat base 20. The guide ribs 28 prevent the battery cell tabs from entering between the bus bar 30 and the seat back body 20.

The spacers 18 are formed one by one between the bus-bar rests 16. The gap 18 allows the insulation between the tabs of the battery cell to be ensured and the width thereof is determined according to the interval between the battery cell tabs.

A bus bar 30 is seated on the bus bar seating base 16. The bus bar 30 is made of a metal material. The bus bar 30 is preferably made of copper or copper alloy with good electrical conductivity. The bus bar 30 is electrically connected to the tab of the battery cell and also to the substrate that is seated in the substrate seating 14.

The bus bar 30 is formed by forming a side plate 34 by being bent at right angles to both sides of a coupling plate 32 having a rectangular plate shape. The tabs of the battery cells are welded and fixed to the coupling plate (32). The side plate (34) is formed with a through hole (35) at a position corresponding to the hooking jaw (24). The hooking jaw 24 is hooked on the through hole 35.

A substrate connecting piece 36 is provided at one end of the coupling plate 32 in the bus bar 30. The substrate connecting piece 36 is a portion for electrically connecting the bus bar 30 and the substrate. The substrate connecting piece 36 is electrically connected to the substrate in the substrate seating part 14 so that the structure of the substrate seating part 14 and the bus bar seating part 12 can be exceeded. In this embodiment, extend through the corresponding portion of the base 10 and extend in the opposite direction.

Hereinafter, the serial connection device for a battery module according to the present invention having the above-described configuration will be assembled and used.

In the present invention, the bus bars 30 are seated on the bus bar rests 16 of the base 10, respectively. The side plate 34 and the coupling plate 32 of the bus bar 30 are not elastically deformed at all during the process of the bus bar 30 being seated on the bus bar seating base 16. That is, when the distance between the side plates 34 of the bus bar 30 is equal to or close to the width of the bus bar seating base 16, the coupling plate 32 of the bus bar 30, And the side plate (34) are brought into close contact with the bus bar receiving table (16). That is, in the assembling process, no elastic deformation occurs in the coupling plate 32 or the side plate 34, and there is no possibility of plastic deformation occurring at all.

Instead, the portion of the side wall 22 on which the hooking jaw 24 is formed is elastically deformed. That is, the side wall 22 of the portion where the hooking jaw 24 is formed is relatively thin, so that when the bus bar 30 is mounted, the hooking jaw 24 is pushed by the side plate 34 of the bus bar 30 It is pushing. When the hooking jaw 24 is seated in the through hole 35, the side wall 22 is restored to its original state. Since the side wall 22 on which the hook jaw 24 is formed is made of synthetic resin, elastic deformation occurs well but plastic deformation can not occur. However, since the bus bar 30 is made of a metal material, plastic deformation occurs when the elastic deformation is excessive. Therefore, in the present invention, elastic deformation occurs at the base side where plastic deformation can not occur, so that plastic deformation that may occur in the bus bar 30 is blocked in advance.

The substrate connecting piece 36 is inserted into the through hole of the substrate in the substrate seating part 14 while protruding in the opposite direction through the base 10 in the process of mounting the bus bar 30 to the base 10, Respectively.

Both ends of the edge of the coupling piece 32 of the bus bar 30 on which the substrate connection piece 36 is provided are guided on the front surface of the spacer projection 27 so that the side wall 19 of the base 10, So that the engaging piece 32 is inserted between the spacer projections 27. As a result, the bus bar 30 can be seated in the bus bar rest 16 without any flow.

The tab of the battery cell is passed through the clearance between the bus bar seating table 16 and the spacer 18 in a state where the bus bar 30 is seated on the bus bar seating table 16, And the tip end is bent so as to be in close contact with the engaging plate 32 of the bar 30. Then, the tabs of the battery cells are physically and electrically connected to the bus bar 30 by welding. In this case, the tab of the battery cell and the board mounted on the board seating unit 14 are electrically connected to each other, and a power and a signal are transmitted to the outside through a mating connector coupled to a connector installed on the board.

When the tabs of the battery cells are passed through the clearance between the bus bar mount table 16 and the spacer 18, the guide ribs 28 are formed such that the tabs of the battery cells are connected to the side plates 34 And the bus bar rests 16, as shown in Fig.

The description above is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in this specification are intended to illustrate and not to limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

For example, in the illustrated embodiment, the groove portion 26 is formed to allow the side wall 22 formed with the hooking jaw 24 to be resiliently deformed. However, since the hooking jaw 24 is formed at the tip of the cantilevered arm, So that the hook jaw 24 can be elastically deformed by the bus bar 30. [

10: Base 12: Bus bar mounting part
14: substrate mounting part 16: bus bar mounting base
18: spacing band 19: side wall
20: seat base body 22: side wall
24: Hook 26: Groove
27: spacer projection 28: guide rib
30: bus bar 32: engaging plate
34: side plate 35: through hole
36: Hooks

Claims (9)

1. A serial connection device for a battery module that connects taps of a plurality of battery cells provided in a battery module in series,
A base having a plurality of bus bar mounts which are made of insulating synthetic resin and are elastically deformed so that the latching jaws are pushed with hooking tails formed on side walls on both sides in the width direction,
And a side plate that is seated on the surface of the bus bar seating base and has a coupling piece electrically connected to the tab of the battery cell and is bent at both sides in the width direction of the coupling bowl and closely attached to the side wall of the bus bar seating base, And a bus bar connecting the tabs of the battery cells in series,
Wherein a gap is provided between the bus bar rests, and tabs of the battery cells pass through a gap between the spacers and the bus bar rests.
2. The serial connection device for a battery module according to claim 1, wherein the base includes a bus bar mounting part formed with the bus bar mounting part and a substrate mounting part formed so as to share one side edge with the bus bar mounting part.
delete 2. The serial connection device for a battery module according to claim 1, wherein a guide rib is formed at a lower end of the bus bar seating plate so as to guide the tab of the battery cell through the space between the bus bar seating plate and the spacer.
The serial connection device for a battery module according to any one of claims 1, 2, and 4, wherein a groove portion is formed such that a portion of the side wall having the hooking jaw is thinner than another portion of the side wall.
6. The serial connection device for a battery module according to claim 5, wherein the groove portion extends to the bus bar seat.
1. A serial connection device for a battery module that connects taps of a plurality of battery cells provided in a battery module in series,
A base having a plurality of bus bar seats made of insulating synthetic resin and having hooking tails formed on side walls on both sides in the width direction,
And a bus bar, which is seated on the bus bar mounting table and is connected to the substrate mounted on one side of the base, and which is made of a conductive metal material,
Wherein when the bus bar is mounted on the bus bar seat, the hook jaw is pushed by the bus bar and the bus bar seat is elastically deformed, so that the hook jaw is hooked on the through hole of the bus bar.
The battery pack according to claim 7, wherein a guide rib is formed at a lower end of the seat for a bus bar to guide the passage of the tabs of the battery cell between the seat fastener and the spacer, Connection device.
The bus bar according to claim 8, wherein the bus bar comprises: a coupling piece which is seated on the surface of the bus bar seating part and is electrically connected to the tab of the battery cell; And a through hole is formed on the side plate to hook the hook.

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