KR101717115B1 - Busbar assembly for electric connecting - Google Patents

Busbar assembly for electric connecting Download PDF

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Publication number
KR101717115B1
KR101717115B1 KR1020150115378A KR20150115378A KR101717115B1 KR 101717115 B1 KR101717115 B1 KR 101717115B1 KR 1020150115378 A KR1020150115378 A KR 1020150115378A KR 20150115378 A KR20150115378 A KR 20150115378A KR 101717115 B1 KR101717115 B1 KR 101717115B1
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KR
South Korea
Prior art keywords
bus bar
connection part
connection
coupling channel
bar assembly
Prior art date
Application number
KR1020150115378A
Other languages
Korean (ko)
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KR20170021058A (en
Inventor
방지웅
Original Assignee
한국단자공업 주식회사
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Application filed by 한국단자공업 주식회사 filed Critical 한국단자공업 주식회사
Priority to KR1020150115378A priority Critical patent/KR101717115B1/en
Publication of KR20170021058A publication Critical patent/KR20170021058A/en
Application granted granted Critical
Publication of KR101717115B1 publication Critical patent/KR101717115B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/14—Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/14—Rails or bus-bars constructed so that the counterparts can be connected thereto at any point along their length
    • H01R25/145—Details, e.g. end pieces or joints

Abstract

The present invention relates to a bus bar assembly. A bus bar (30) forms the framework of the bus bar assembly of the present invention. A first connection part 32 is formed on one side of the bus bar 30 so that the cell electrode 50 is coupled by laser welding. A coupling channel (33) is formed in the first connection part (32). The coupling channel 33 is elongated in the longitudinal direction of the first connection part 32. The area of the first connection part 32 in which the coupling channel 33 is formed is formed as a thin wall part 34, 30). The area of the first connection part 32 without the coupling channel 33 is the thick part 35, which is substantially the same as the thickness of the bus bar 30. The thin portion 34 is a portion where laser welding is performed for coupling with the cell electrode 50, and the thick portion 35 is mainly responsible for energization. An external connection part 42 is formed at one end of the first connection part 32 to perform an electrical connection with the outside and a second connection part 37 at the other end to electrically connect with the outside . The connecting piece 36 having a thickness smaller than that of the bus bar 30 is coupled to the second connecting portion 37 by the caulking portion 38.

Description

[0001] Busbar assembly for electric connecting [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar assembly for electrical connection, and more particularly, to an electrical bus bar assembly for electrical connection capable of performing laser welding while maintaining a constant current carrying capability.

As more and more fields are used where high voltage is used, there are many cases where electrical connections are made using bus bar assemblies. For example, a bus bar assembly is used to electrically connect to the outside in a serial connection device that connects each battery cell in series in a battery used in an electric vehicle.

FIG. 1 to FIG. 3 show a conventional bus bar assembly. FIG. 1 is a perspective view of a conventional bus bar assembly, and FIG. 2 is a vertical sectional perspective view of the bus bar assembly shown in FIG. 1. FIG. 3 is a perspective view of the bus bar assembly shown in FIG. Sectional view. For reference, the bus bar assembly shown in FIG. 1 to FIG. 3 is not applied to an actual product and is not known until now in the course of development of a serial connection device.

According to these drawings, the conventional bus bar assembly is made by stacking the first bus bar 10 and the second bus bar 10 '. The first bus bar 10 is relatively thicker than the second bus bar 10 '. The first bus bar 10 is about 2 mm thick and the second bus bar 10 'is about 0.8 mm thick. The first bus bar 10 and the second bus bar 10 'are coupled through a toxing portion 19' of a coupling portion 19 to be described below.

The bus bar assembly has a first connection portion (12). This is the part for electrical connection, for example, where the electrode of the battery cell is laser welded. The first connection part 12 has a second connection part 14 at one end thereof. The second connection part 14 is formed by extending and bending the second bus bar 10 'for electrical connection with the outside. In the second connection part 14, the first bus bar 10 and the second bus bar 10 'are physically coupled and electrically connected by the caulking part 14'.

And an external connection part 16 is provided at the opposite end with respect to the second connection part 14. The external connection portion 16 is a portion where external terminals are coupled and electrically connected. A bolt hole 16 'is formed in the external connection part 16. One end portion of the external connection portion 16 has a hook portion 17, which is inserted into a structure formed in a housing in which the bus bar assembly is installed.

The fixing portion 18 is bent and formed on the opposite end of the second bus bar 10 'with respect to the second connecting portion 14. [ The fixing portion 18 is coupled with the fused protrusion formed on the housing in which the bus bar assembly is installed to firmly mount the bus bar assembly.

A coupling portion 19 is provided between the external connection portion 16 and the first connection portion 12. The coupling portion 19 is a portion where the first bus bar 10 and the second bus bar 10 'are coupled by the detaching portion 19'. To combine the first bus bar 10 and the second bus bar 10 'by forming the coupling portion 19, a toxing operation must be performed using a toxic equipment.

The use of the first bus bar 10 and the second bus bar 10 'which are different in thickness from each other as described above in the prior art is advantageous in that the cross sectional area of the bus bar assembly is adjusted to the current carrying capacity, So that laser welding can be performed. This is because when the bus bars 10 and 10 'made of the same material have a thickness exceeding a certain level, it is difficult to perform laser welding with battery cell electrodes made of aluminum. Therefore, the first bus bar 10 and the second bus bar 10 'are laminated by laser welding using a relatively thinner material such as the second bus bar 10', thereby satisfying the current carrying capacity.

However, in the above-described prior art, since the bucking equipment for forming the coupling unit 19 is required, there is a problem that the manufacturing cost is increased due to an increase in the number of workpieces for manufacturing the bus bar assembly.

Since the first bus bar 10 and the second bus bar 10 'are not combined in all the areas but only in some areas such as the toxing part 19', the first bus bar 10 and the second bus bar 10 ' A gap may be formed between the bus bars 10 '. Such a gap has a problem of deteriorating the performance of the bus bar assembly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bus bar assembly for solving the above-mentioned problems of the prior art, in which one bus bar is used to satisfy the current carrying capacity and reliability of laser welding.

According to an aspect of the present invention, there is provided a bus bar comprising: a bus bar defining a skeleton; and a coupling channel having a predetermined width and length at one side of the bus bar, The bus bar is formed to extend in the longitudinal direction so that the position where the coupling channel is formed is thinned to be a thinned portion and is coupled to the counter electrode through laser welding and a position where the coupling channel is absent is thicker than the thinned portion And an external connection part provided at one end of the bus bar for performing electrical connection with the outside, wherein an opposite end of the bus bar is electrically connected to the outside through a first connection part which is thick and thick, And a second connection part for the second connection part.

The coupling channel extends in the longitudinal direction of the bus bar constituting the first connection portion, and the coupling channel extends along the widthwise center of the first connection portion.

A hook portion is formed at one end of the external connection portion.

The bent portion is located between the first connection portion and the external connection portion.

The second connection portion is coupled to the bus bar by caulking and protrudes from one side of the connection piece thinner than the bus bar.

The connecting piece is caulked to a bus bar and penetrates through a caulking portion to form a through hole. A fused protrusion is provided through the through hole.

The following effects can be obtained in the bus bar assembly according to the present invention.

In the bus bar assembly of the present invention, a thinner thick portion and a thicker thick portion are provided on one bus bar so that electricity is mainly conducted through the thick portion and the thin portion is coupled with the external electrode. Therefore, in the present invention, it is possible to obtain an effect that the connection with the external electrode can be reliably performed while satisfying the energizing capacity of one bus bar.

In addition, since the bus bar assembly of the present invention is energized through one bus bar, the problem of spark generation is eliminated.

1 is a perspective view of a conventional bus bar assembly;
2 is a vertical cross-sectional perspective view of the bus bar assembly shown in FIG.
3 is a cross-sectional view showing the tussling portion of the bus bar assembly shown in Fig.
4 is a perspective view showing a configuration of a preferred embodiment of a bus bar assembly according to the present invention.
5 is a longitudinal sectional view showing the configuration of the embodiment shown in Fig.
6 is a cross-sectional view showing the configuration of the embodiment shown in Fig.
FIG. 7 is a use state showing a state where a cell electrode and a substrate are connected to the embodiment shown in FIG. 4. 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 numerals whenever 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 intended to be interpreted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may 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;

As shown in Fig. 3 to Fig. 7, the bus bar 30 forms the framework of the bus bar assembly of this embodiment. The bus bar 30 is formed by pressing a metal plate into a predetermined shape. A first connection part 32 is formed on the bus bar 30. The first connection part 32 is connected to a cell electrode 50 to be described below. A coupling channel 33 is formed in the first connection part 32 in the longitudinal direction thereof. The coupling channel (33) is formed over substantially the entire length of the first connection portion (32). The coupling channel 33 is formed in the first connection portion 32 of the bus bar 30 through a forging operation. The coupling channel (33) is recessed on one surface of the first connection part (32).

The first connection portion 32 is divided into a thin portion 34 and a thick portion 35 by forming the coupling channel 33. The thin portion 34 is relatively thicker than the thick portion 35 It is thin in thickness. The thick portion 34 is thinner than the bus bar 30 and the thick portion 35 is substantially the same thickness as the thickness of the bus bar 30. [

The thin-wall portion 34 is a portion where laser welding is performed with the cell electrode 50 to be described below. It is preferable that the thickness of the thin portion 34 is set to the best value of the laser welding characteristic. The thick portion (35) is thicker than the thin portion (34). The thicker portion 35 is a portion for determining the energizing capacity. The thickness of the bus bar 30 is determined according to the capacity of the electricity transmitted through the bus bar 30.

A connection piece 36 is coupled to one end of the bus bar 30 and a second connection part 37 is formed by bending the connection piece 36. The second connection portion 37 is for electrical connection with the outside. In this embodiment, it is electrically connected to the substrate 52, which will be described below. The second connection portion 37 is formed to be bent a plurality of times. For this purpose, the thickness of the connection portion 37 is preferably relatively thin. Therefore, the connecting piece 36 is thinner than the bus bar 30. The connecting piece 36 is coupled to the bus bar 30 by forming a caulking portion 38.

A bending portion 40 is provided at the opposite end of the bus bar 30 where the connecting piece 36 is installed and an external connection portion 42 is formed by extending from the bending portion 40. Both the bent portion 40 and the external connection portion 42 are integral with the bus bar 30. An external terminal is coupled to the external connection part 42 and electrically connected to the outside. For this, a bolt hole 43 is formed in the external connection part 42. A hook 45 is formed at one end of the external connection part 42. The hooking part 45 is inserted into the hooking structure formed in the housing in which the bus bar assembly is installed, so that the installation state of the bus bar assembly is firm.

5, a penetration hole is formed in the caulking portion 38 to fix the bus bar assembly to the housing by penetrating the fused protrusion in the housing and fusing the tip of the penetration hole. can do. The through hole may be formed at a proper position of the bus bar 30.

Hereinafter, a bus bar assembly according to the present invention will be described in detail.

The bus bar 30 is made by machining a plate-like base metal. The coupling channel 33 is made by a forging operation. The coupling channel 33 is formed to extend in the longitudinal direction through the center in the width direction of the first connection portion 32. However, the position of the coupling channel 33 may be shifted to one side end of the first connection part 32, not the widthwise center thereof.

Next, the shape of the bus bar 30 is formed by removing only the necessary part of the plate-shaped base material, and the bending part 40 and the external connection part 42 are bent to complete the shape.

After the shape of the bus bar 30 is formed, the connecting piece 36 is coupled to one end of the bus bar 30 through a caulking operation. This completes the bus bar assembly.

In the bus bar assembly, as shown in FIG. 7, the cell electrode 50 is coupled to the first connection portion 32 by laser welding to form an electrical connection. When the cell electrode 50 is laser-welded to the first connection part 32, the first connection part 32 and the cell electrode 50 are coupled to each other by irradiating a laser in the traveling direction of the coupling channel 33.

The second connection portion 37 is connected to the substrate 52 by inserting a tip end into a through hole (not shown) formed in the substrate 52. Thus, the substrate 52 and the bus bar assembly are electrically connected.

An external terminal is tightly connected to the external connection portion 42 by a bolt passing through the bolt hole 43 to be electrically connected.

Therefore, a plurality of battery cells including the cell electrode 50 connected to the first connection part 32 are connected in series, and finally, the first connection part 32 is energized to the external connection part 42. In addition, signals from components installed on the substrate 52 can be transmitted through the second connection part 37.

For example, the bus bar assembly is mounted on a housing of a serial connection device. The fused protrusion in the housing passes through a through hole formed in the caulking portion 38, Can be fixed. The hooking part 45 is also inserted and fixed in the insertion structure formed in the housing so that the installation position of the bus bar assembly can be accurately maintained.

As described above, in the bus bar assembly of the present invention, the bus bar 30 is provided with the thick portion 34 for laser welding the cell electrode 50, and the thick portion 35 for matching the power supply capacity. Therefore, it is possible to satisfy the electrical connection and the current carrying capacity by using one bus bar 30. [

The foregoing description 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. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

For example, the second connection portion 37 is not always required. That is, the function of the bus bar assembly is meaningful only with the first connection part 32 and the external connection part 42. [

10: first bus bar 10 ': second bus bar
12: first connection part 14: second connection part
14 ': caulking portion 16: external connection portion
16 ': Bolt hole 17: Hook part
18: Fixing portion 19:
19 ': Toksingu 30: Bus bar
32: first connection part 33: coupling channel
34: thin section 35: thick section
36: connecting piece 37: second connecting piece
38: caulking portion 40:
42: external connection part 43: bolt hole
45: Hanger part 50: Cell electrode
52: substrate

Claims (7)

A bus bar forming a skeleton,
A coupling channel having a predetermined width and a predetermined length is formed on one side of the bus bar so as to extend in the longitudinal direction so as to be recessed by a predetermined depth from the surface of the bus bar, and the position of the coupling channel in the bus bar is thinned, A first connection portion which is joined to the counter electrode through laser welding and in which the coupling channel is absent, is thicker than the thin portion to become a thick portion;
And an external connection part provided at one end of the bus bar for performing an electrical connection with the outside,
And a second connection part for electrical connection to the outside is further provided on the opposite end of the bus bar.
The bus bar assembly of claim 1, wherein the coupling channel extends in a longitudinal direction of a bus bar constituting the first connection portion, the coupling channel extending along a widthwise center of the first connection portion.
The bus bar assembly of claim 1, wherein a hook portion is formed at one end of the external connection portion.
The bus bar assembly of claim 1, wherein the bending portion is located between the first connection portion and the external connection portion.
delete The bus bar assembly according to any one of claims 1 to 4, wherein the second connection portion is caulked to the bus bar and protrudes from one side of a thinner connection piece than the bus bar.
The bus bar assembly according to claim 6, wherein the connecting piece is formed in a through hole through a caulking portion coupled to the bus bar so that a fused protrusion is provided through the through hole.
KR1020150115378A 2015-08-17 2015-08-17 Busbar assembly for electric connecting KR101717115B1 (en)

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KR1020150115378A KR101717115B1 (en) 2015-08-17 2015-08-17 Busbar assembly for electric connecting

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Application Number Priority Date Filing Date Title
KR1020150115378A KR101717115B1 (en) 2015-08-17 2015-08-17 Busbar assembly for electric connecting

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KR20170021058A KR20170021058A (en) 2017-02-27
KR101717115B1 true KR101717115B1 (en) 2017-03-16

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102423609B1 (en) 2017-09-29 2022-07-21 에스케이온 주식회사 Battery Module for Secondary Battery
KR102383415B1 (en) 2018-03-20 2022-04-06 삼성에스디아이 주식회사 Battery pack
CN114388986A (en) * 2022-01-21 2022-04-22 中能易电新能源技术有限公司 Bus bar in battery module, laser welding battery module and laser welding method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000354319A (en) 1999-06-09 2000-12-19 Yazaki Corp Bus-bar structure
KR200415181Y1 (en) 2006-01-31 2006-05-02 경신공업 주식회사 structure of caulking a bus-bar and a plate
KR101035789B1 (en) 2003-01-23 2011-05-20 소니 주식회사 Power supply device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1397393A1 (en) * 2001-04-27 2004-03-17 Ucb, S.A. Photo-initiator compositions
KR100988788B1 (en) * 2008-06-16 2010-10-20 한국단자공업 주식회사 Assembling type busbar

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000354319A (en) 1999-06-09 2000-12-19 Yazaki Corp Bus-bar structure
KR101035789B1 (en) 2003-01-23 2011-05-20 소니 주식회사 Power supply device
KR200415181Y1 (en) 2006-01-31 2006-05-02 경신공업 주식회사 structure of caulking a bus-bar and a plate

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