CN214477794U - Electric connection assembly and battery module - Google Patents
Electric connection assembly and battery module Download PDFInfo
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- CN214477794U CN214477794U CN202120835681.9U CN202120835681U CN214477794U CN 214477794 U CN214477794 U CN 214477794U CN 202120835681 U CN202120835681 U CN 202120835681U CN 214477794 U CN214477794 U CN 214477794U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to the technical field of batteries, especially, relate to an electric connection assembly and battery module, electric connection assembly includes the compound ba of copper aluminium, and the compound ba of copper aluminium includes copper lateral part and aluminium lateral part, and the copper lateral part is used for a plurality of copper tab welded connection with a plurality of electric cores of parallel connection, and the aluminium lateral part is used for a plurality of aluminium tab welded connection with a plurality of electric cores of parallel connection. The battery module includes foretell electric connection assembly, still includes a plurality of electric cores. This electrical connection component can guarantee that the copper tab of electric core and the copper lateral part welding of the compound ba of copper aluminium, and the aluminium tab of electric core and the aluminium lateral part welding of the compound ba of copper aluminium adopt the welding process of the same kind of metal, rosin joint and the fragility phase problem when having avoided dissimilar metal welding to the quality of battery module has been guaranteed.
Description
Technical Field
The utility model relates to a battery technology field especially relates to an electric connection component and battery module.
Background
Batteries are widely used in various industries, and batteries with large electric quantity comprise a plurality of battery cores. The electric connection mode between the battery cells is generally realized by laser welding of a tab and a copper bar, so that series and parallel connection between the battery cells is realized. For example, 3-to-8-string battery modules, generally adopt a form of directly welding 3 layers of aluminum tabs and copper bars. This approach has the following problems:
1. the total thickness of the lugs is too thick, the thickness of the aluminum lug is generally 0.4mm, the thickness of the copper lug is generally 0.2mm, the thickness of the 3-layer aluminum lug is 1.2mm, and the direct welding of the 3-layer aluminum lug and the copper bar easily causes the problem that the gap between the aluminum lug and the copper bar is difficult to control, so that the welding force cannot meet the requirement;
2. when the aluminum tab and the copper bar are welded, the welding process parameters of dissimilar metals are difficult to control, the problem of insufficient welding is easily caused, and the product performance is seriously influenced;
3. the copper-aluminum molten pool is easy to form brittle phase, which causes poor welding performance.
Therefore, there is a need for an electrical connection assembly to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electric connection assembly can guarantee the welded quality between utmost point ear and the piece of crust to guarantee the abundant connection between electric core.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an electric connection assembly, includes the compound ba of copper aluminium, the compound ba of copper aluminium includes copper lateral part and aluminium lateral part, the copper lateral part is used for a plurality of copper utmost point ear welded connection with a plurality of electric cores of parallel connection, the aluminium lateral part be used for with parallel connection a plurality of aluminium utmost point ear welded connection of electric core.
Optionally, the copper-aluminum composite bar is arranged on the insulating support.
Optionally, a channel is arranged on the insulating support, the copper-aluminum composite bar is arranged on one side of the insulating support, the battery cell is arranged on the other side of the insulating support, and the copper tab and the aluminum tab penetrate through the channel and are respectively electrically connected with the copper side part and the aluminum side part.
Optionally, a first protruding surface and a first inner concave surface which are connected are arranged on one surface of the copper side part, the aluminum side part is arranged at the first inner concave surface, and the opposite surface of the aluminum side part, which is in contact with the first inner concave surface, is flush with the first protruding surface;
or a second protruding surface and a second inner concave surface which are connected are arranged on one surface of the aluminum side part, the copper side part is arranged at the second inner concave surface, and the opposite surface of the surface, which is contacted with the second inner concave surface, on the copper side part is flush with the second protruding surface.
Optionally, a through hole is formed in the copper-aluminum composite bar, and the copper tab and/or the aluminum tab pass through the through hole.
Optionally, the copper side portion and the aluminum side portion are welded to form the copper-aluminum composite bar;
or the copper side part and the aluminum side part are formed into the copper-aluminum composite bar through a cold pressing process.
Optionally, the number of the copper tabs connected with one copper side part is at least three;
and/or at least three aluminum tabs connected with one aluminum side.
Optionally, the copper-aluminum composite bars are provided in plurality, and the plurality of copper-aluminum composite bars are arranged in series.
Optionally, the copper-aluminum composite bar is detachably connected with the insulating support.
Another object of the utility model is to provide a battery module can guarantee the welded quality between utmost point ear and the piece of crust to guarantee the abundant connection between electric core.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery module comprises the electric connection assembly and a plurality of battery cores.
The utility model has the advantages that:
the utility model provides an electric connection assembly, including the compound ba of copper aluminium, the compound ba of copper aluminium includes copper lateral part and aluminium lateral part, and the copper lateral part is used for a plurality of copper tab welded connection with a plurality of electric cores of parallel connection, and the aluminium lateral part is used for a plurality of aluminium tab welded connection with a plurality of electric cores of parallel connection. The utility model also provides a battery module, including foretell electrical connection component, still include a plurality of electric cores. This electrical connection component can guarantee that the copper tab of electric core and the copper lateral part welding of the compound ba of copper aluminium, and the aluminium tab of electric core and the aluminium lateral part welding of the compound ba of copper aluminium adopt the welding process of the same kind of metal, rosin joint and the fragility phase problem when having avoided dissimilar metal welding to the quality of battery module has been guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of an electrical connection assembly according to an embodiment of the present invention;
fig. 2 is a front view of an electrical connection assembly provided by an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is an exploded view of an electrical connection assembly provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a copper-aluminum composite bar of an electrical connection assembly provided in an embodiment of the present invention;
fig. 6 is a front view of the copper-aluminum composite bar of the electrical connection assembly provided in the embodiment of the present invention;
fig. 7 is a sectional view of B-B in fig. 6.
In the figure:
1. copper-aluminum composite bars; 11. a copper side portion; 12. an aluminum side portion;
2. a copper tab;
3. aluminum tabs;
4. and an insulating support.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 7, the present embodiment provides an electrical connection assembly, which includes a copper-aluminum composite bar 1, the copper-aluminum composite bar 1 includes a copper side portion 11 and an aluminum side portion 12, the copper side portion 11 is used for being welded to a plurality of copper tabs 2 of a plurality of electrical cores connected in parallel, and the aluminum side portion 12 is used for being welded to a plurality of aluminum tabs 3 of a plurality of electrical cores connected in parallel. This electrical connection component can guarantee that the copper tab 2 of electric core and the copper lateral part 11 welding of the compound 1 of copper aluminium, and the aluminium tab 3 of electric core and the aluminium lateral part 12 welding of the compound 1 of copper aluminium adopt the welding process of the same kind of metal, rosin joint and the fragility phase problem when having avoided dissimilar metal welding to the quality of battery module has been guaranteed.
In order to make the copper side portion 11 and the aluminum side portion 12 have a welding plane large enough to reduce the welding difficulty and ensure the welding quality, optionally, a half of the copper side portion 11 and a half of the aluminum side portion 12 are provided on a side plane of the copper-aluminum composite bar 1. Optionally, there are two kinds of setting ways, one is that the one side of copper lateral part 11 is provided with the first protruding face and the first interior concave face that are connected, aluminium lateral part 12 is provided in first interior concave face department, and the opposite face of the face that contacts with the first interior concave face on aluminium lateral part 12 flushes with first protruding face. As shown in fig. 5 to 7, another method is to provide a second protruding surface and a second concave surface connected to each other on one surface of the aluminum side portion 12, to provide the copper side portion 11 at the second concave surface, and to level the opposite surface of the copper side portion 11 contacting the second concave surface with the second protruding surface. Such mode of setting up can guarantee that copper aluminium composite bar 1 has great combination plane between copper lateral part 11 and the aluminium lateral part 12 at the in-process of machine-shaping, is favorable to reducing the processing degree of difficulty, can guarantee the intensity of the copper aluminium composite bar 1 after the shaping simultaneously, combines closely between copper lateral part 11 and the aluminium lateral part 12 moreover, has guaranteed that the electric connection contact is inseparable between the two. Alternatively, the copper side 11 and the aluminum side 12 are welded to form the copper aluminum composite bar 1, or the copper side 11 and the aluminum side 12 employ a cold pressing process to form the copper aluminum composite bar 1. Namely, the copper-aluminum composite bar 1 can be formed into a finished product through cold press molding to be used as the incoming material of the battery module. Or the copper sheet and the aluminum sheet are respectively supplied, when the tab welding is carried out, one welding of the copper sheet and the aluminum sheet is added, and the welding quality between the tab and the aluminum sheet can still be effectively ensured on the premise of not influencing the welding rhythm.
For a battery with a plurality of battery cells connected in series and parallel, a plurality of copper-aluminum composite bars 1 need to be arranged, and the plurality of copper-aluminum composite bars 1 are arranged in series. In order to ensure that the relative positions of the plurality of copper-aluminum composite bars 1 are fixed, optionally, the electrical connection assembly provided by the embodiment further includes an insulating support 4. Specifically, the copper-aluminum composite bar 1 is arranged on the insulating bracket 4. The plurality of copper-aluminum composite bars 1 may be arranged on the insulating support 4 at intervals in a row, and of course, the shape of the insulating support 4 and the arrangement mode of the copper-aluminum composite bars 1 may be adjusted according to the structural characteristics of the battery cell. Optionally, the copper-aluminum composite bar 1 is detachably connected with the insulating support 4, so that the installation, replacement and position adjustment of the copper-aluminum composite bar 1 are facilitated. Optionally, the present embodiment adopts a screw connection manner.
Optionally, a channel is arranged on the insulating support 4, the copper-aluminum composite bar 1 is arranged on one side of the insulating support 4, the battery cell is arranged on the other side of the insulating support 4, and the copper tab 2 and the aluminum tab 3 penetrate through the channel and are electrically connected with the copper side portion 11 and the aluminum side portion 12 respectively.
Optionally, the copper tab 2 and the aluminum tab 3 respectively pass through the channel and then are bent to form a larger contact surface with the copper-aluminum composite bar 1, and the surface of the copper-aluminum composite bar 1, which is provided with the copper side portion 11 and the aluminum side portion 12, is far away from the insulating support 4. The bent copper tab 2 is connected with the copper side part 11 by welding, and the bent aluminum tab 3 is connected with the aluminum side part 12 by welding.
The copper tab 2 and the aluminum tab 3 can be bent relatively through two sides of the copper-aluminum composite bar 1, and in such a way, the space at two sides of the copper-aluminum composite bar 1 needs to be occupied, and the contact between the tabs welded with the adjacent copper-aluminum composite bar 1 needs to be ensured. In order to save space when the copper-aluminum composite bars 1 are arranged in parallel at intervals, optionally, through holes are formed in the copper-aluminum composite bars 1, and the through holes are used for enabling the copper tabs 2 and/or the aluminum tabs 3 to penetrate through the copper-aluminum composite bars 1. Specifically, the copper tab 2 is bent from the outside of the copper side 11 of the copper-aluminum composite bar 1, and the aluminum tab 3 can pass through the through hole and be bent toward the aluminum side 12. Or the aluminum tab 3 is bent from the outer side of the aluminum side part 12 of the copper-aluminum composite bar 1, and the copper tab 2 can penetrate through the through hole and is bent towards the copper side part 11. The copper-aluminum composite bars 1 with through holes and the copper-aluminum composite bars 1 without through holes can be flexibly arranged according to the arrangement requirements of the plurality of copper-aluminum composite bars 1 so as to realize optimal spatial arrangement.
As shown in fig. 1-4, when the 3-to-8-string battery module is applied to the electrical connection assembly, four copper-aluminum composite bars 1 are arranged, the copper-aluminum composite bars 1 on two sides are provided with through holes, and the two copper-aluminum composite bars 1 in the middle are not provided with through holes. Of course, in other embodiments, the copper-aluminum composite bars 1 may be arranged in other manners according to different arrangement requirements, and the space is preferably fully utilized as a whole. Of course, the electrical connection assembly can also be applied to battery modules of other specifications.
The larger the number of the parallel-connected battery cores is, the more easily the welding problem occurs, and the more the electric connection assembly needs to be adopted to ensure the welding quality. Therefore, at least three copper tabs 2 are optionally connected with one copper side part 11, and the three copper tabs 2 are overlapped and bent to be connected with the copper side part 11 in a welding mode. Optionally, at least three aluminum tabs 3 are connected with one aluminum side portion 12, and the three aluminum tabs 3 are overlapped and bent to be connected with the aluminum side portion 12 in a welding mode.
The embodiment also provides a battery module, which comprises the electric connection assembly and a plurality of battery cores. The battery module can ensure the quality of welding between the lug and the bus bar, thereby ensuring the sufficient connection between the battery cores and being beneficial to improving the product quality of the battery module.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an electric connection assembly, its characterized in that, includes compound ba (1) of copper aluminium, compound ba (1) of copper aluminium includes copper lateral part (11) and aluminium lateral part (12), copper lateral part (11) are used for a plurality of copper tab (2) welded connection with a plurality of electric cores of parallel connection, aluminium lateral part (12) are used for a plurality of with parallel connection a plurality of aluminium tab (3) welded connection of electric core.
2. The electrical connection assembly according to claim 1, further comprising an insulating support (4), the copper aluminum composite bar (1) being disposed on the insulating support (4).
3. The electrical connection assembly according to claim 2, characterized in that the insulating support (4) is provided with a channel, the copper-aluminum composite bar (1) is arranged on one side of the insulating support (4), the electrical core is arranged on the other side of the insulating support (4), and the copper tab (2) and the aluminum tab (3) pass through the channel and are electrically connected with the copper side portion (11) and the aluminum side portion (12), respectively.
4. The electrical connection assembly according to claim 1, wherein one face of the copper side portion (11) is provided with a first convex face and a first concave face which are connected, the aluminum side portion (12) is provided at the first concave face, and an opposite face of a face of the aluminum side portion (12) which is in contact with the first concave face is flush with the first convex face;
or a second protruding surface and a second inner concave surface which are connected are arranged on one surface of the aluminum side part (12), the copper side part (11) is arranged at the second inner concave surface, and the opposite surface of the surface, which is contacted with the second inner concave surface, of the copper side part (11) is flush with the second protruding surface.
5. The electrical connection assembly as claimed in claim 1, wherein the copper-aluminum composite bar (1) is provided with a through hole, and the copper tab (2) and/or the aluminum tab (3) are disposed through the through hole.
6. The electrical connection assembly according to claim 1, characterized in that the copper side (11) and the aluminum side (12) form the copper aluminum composite bar (1) by welding;
or the copper side (11) and the aluminum side (12) are formed into the copper-aluminum composite bar (1) by a cold pressing process.
7. The electrical connection assembly according to claim 1, characterized in that the number of copper tabs (2) connected to one copper side (11) is at least three;
and/or the number of the aluminum tabs (3) connected with one aluminum side portion (12) is at least three.
8. The electrical connection assembly according to claim 1, wherein the copper-aluminum composite bar (1) is provided in plurality, and a plurality of the copper-aluminum composite bars (1) are provided in series.
9. The electrical connection assembly according to claim 2, characterized in that the copper-aluminum composite bar (1) is detachably connected with the insulating support (4).
10. A battery module comprising the electrical connection assembly of any one of claims 1-9, and further comprising a plurality of the cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120835681.9U CN214477794U (en) | 2021-04-22 | 2021-04-22 | Electric connection assembly and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120835681.9U CN214477794U (en) | 2021-04-22 | 2021-04-22 | Electric connection assembly and battery module |
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| Publication Number | Publication Date |
|---|---|
| CN214477794U true CN214477794U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120835681.9U Active CN214477794U (en) | 2021-04-22 | 2021-04-22 | Electric connection assembly and battery module |
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| CN (1) | CN214477794U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284643A (en) * | 2021-12-17 | 2022-04-05 | 上海瑞浦青创新能源有限公司 | Multi-row module structure |
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2021
- 2021-04-22 CN CN202120835681.9U patent/CN214477794U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114284643A (en) * | 2021-12-17 | 2022-04-05 | 上海瑞浦青创新能源有限公司 | Multi-row module structure |
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