CN212113919U - Secondary lithium battery - Google Patents
Secondary lithium battery Download PDFInfo
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- CN212113919U CN212113919U CN202020554982.XU CN202020554982U CN212113919U CN 212113919 U CN212113919 U CN 212113919U CN 202020554982 U CN202020554982 U CN 202020554982U CN 212113919 U CN212113919 U CN 212113919U
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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 discloses a secondary lithium battery relates to the secondary battery field, including shell, the electric core of setting in the shell and the top cap of setting on the shell, electric core with be provided with first connection piece and second connection piece between the top cap, be provided with negative pole ear and anodal ear on the electric core, be provided with negative pole post and anodal post on the top cap, the material of negative pole post is aluminium, the negative pole ear passes through first connection piece with the negative pole end connection, anodal ear passes through the second connection piece with anodal post is connected. The utility model has the advantages that the cathode pole of the top cover is made of aluminum, the positive pole and the negative pole of the top cover are made of uniform materials, and the utility model has the advantages of low production cost, low management cost and the like; the first connecting piece and the negative pole column can be welded by aluminum and aluminum laser, so that the welding difficulty and the welding cost are reduced, the welding power of the aluminum and aluminum laser is low, the welding effect is better, the laser welding equipment with low power can be selected, and the equipment investment is reduced.
Description
Technical Field
The utility model relates to a secondary battery field specifically says a secondary lithium cell.
Background
Under the two-wheel drive of national policies and markets, electric vehicles, energy storage industries, and electric tools are rapidly developing, and thus, the demand for batteries is also more and more vigorous. Batteries need to have improved capacity and safety, and low cost to meet the needs of people.
At present, secondary battery top covers on the market are mostly in riveted structures, injection molding structures, welding structures and the like. However, the existing secondary battery top cover has at least the following defects: the lithium battery comprises a conventional lithium battery structure, wherein a top cover and a negative pole column are in structures such as copper-aluminum friction welding, copper pole column riveting and copper-aluminum composite plates, the upper section of the copper-aluminum friction welding structure is aluminum, the lower section of the copper-aluminum friction welding structure is copper, and the joint is in copper-aluminum friction welding, so that the copper-aluminum friction welding process theoretically meets the high-strength requirement of a welding structure, but the copper-aluminum welding machine can break away or rosin joint and welding resistance are large due to various temperatures and mechanical stresses in the actual battery cell use environment; the copper-aluminum friction welding process quality has large fluctuation, has high requirements on welding equipment and process parameter control, and is complex, so that the production cost of the whole battery cell is increased undoubtedly, and the risk of copper and aluminum falling off exists; the copper pole column riveting structure is easy to oxidize due to the fact that copper is exposed outside, and the cost is high; the birthday rise of the copper-aluminum composite board is higher. And secondly, in the assembly process of the battery cell, the negative connecting piece and the top cover negative pole column are welded by copper and copper in a laser mode, compared with the laser welding of aluminum and aluminum, the laser welding of copper and copper has high power, larger welding difficulty and larger welding equipment investment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a secondary lithium cell with aluminium negative pole post.
The technical solution of the utility model is as follows:
the utility model provides a secondary lithium battery, includes the shell, sets up electric core and the top cap of setting on the shell in the shell, electric core with be provided with first connection piece and second connection piece between the top cap, be provided with negative pole ear and anodal ear on the electric core, be provided with negative pole post and anodal post on the top cap, the material of negative pole post is aluminium, the negative pole ear passes through first connection piece with negative pole column connection, anodal ear passes through the second connection piece with anodal post is connected.
As a preferential technical solution, the first connecting sheet includes a first pole connecting portion and a first tab connecting portion connected with the first pole connecting portion, the first pole connecting portion is connected with the negative pole, and the first tab connecting portion is connected with the negative pole; the second connecting piece comprises a second pole connecting part and a second pole ear connecting part connected with the second pole connecting part, the second pole connecting part is connected with the positive pole, and the second pole ear connecting part is connected with the positive pole ear.
As a preferred technical solution, when the secondary lithium battery is assembled, the first tab connecting portion and the second tab connecting portion are first connected to the negative tab and the positive tab, respectively, and then the first pole connecting portion and the second pole connecting portion are connected to the negative pole and the positive pole, respectively.
As a preferential technical scheme, the first pole lug connecting part and the second pole lug connecting part are respectively connected with the negative pole lug and the positive pole lug through ultrasonic welding, and the first pole lug connecting part and the second pole lug connecting part are respectively connected with the negative pole column and the positive pole column through laser welding.
As a prior technical scheme, the first pole connecting part is made of aluminum, and the first pole lug connecting part is made of copper.
As a preferred technical solution, the width of the first pole connecting portion is smaller than the width of the first pole tab connecting portion, and the width of the second pole connecting portion is smaller than the width of the second pole tab connecting portion.
As a prior technical scheme, the battery cell comprises a first battery cell and a second battery cell, the first battery cell is provided with a first battery cell negative electrode tab and a first battery cell positive electrode tab, the second battery cell is provided with a second battery cell negative electrode tab and a second battery cell positive electrode tab, one end of the first tab connecting portion is connected with the first battery cell negative electrode tab, the other end is connected with the second battery cell negative electrode tab, one end of the second tab connecting portion is connected with the first battery cell positive electrode tab, and the other end is connected with the second battery cell positive electrode tab.
As a preferred technical scheme, the second connecting piece is made of aluminum.
As a preferential technical scheme, the positive pole is made of aluminum.
As a preferential technical scheme, the structure of the negative pole is the same as that of the positive pole,
the utility model has the advantages that: the utility model discloses an adopt the aluminium material with top cap negative pole post, positive negative pole post material of top cap is unified, all adopts full aluminium structure, has low in production cost, low management cost's advantage. Secondly, first connecting piece and negative pole post can adopt aluminium and aluminium laser welding, have reduced the welding degree of difficulty and the welding cost between negative pole post and the connecting piece, and aluminium laser welding power is low, and the welding effect is better, and the low laser welding equipment of optional power, and the equipment investment reduces. Finally, first connection piece includes the first utmost point post link of aluminium material and the first utmost point ear link of copper product to copper and aluminium in the first connection piece can adopt modes such as composite sheet, riveting to link together, and the structure is more stable, is difficult to damage, low in production cost.
Drawings
Fig. 1 is a schematic diagram of an explosion structure of a secondary lithium battery according to a preferred embodiment of the present invention;
fig. 2 is a bottom view of the assembly of the first connecting piece, the second connecting piece and the battery cell in the preferred embodiment of the present invention;
FIG. 3 is a bottom view of the assembly of the first connecting piece, the second connecting piece and the top cover in the preferred embodiment of the present invention;
fig. 4 is a schematic structural diagram of the first connecting piece in the preferred embodiment of the present invention.
Description of reference numerals: 10-top cover, 11-negative pole column, 12-positive pole column; 20-a first connecting tab; 21-a first pole connection end; 22-a first tab connection end; 30-a second connecting piece; 40-a first cell; 41-a first cell negative tab; 42-a first cell positive tab; 50-a second cell; 51-a second cell negative tab; and 52-a second battery cell positive lug.
Detailed Description
The present invention will be described in further detail with reference to the following specific examples, but the present invention is not limited to the following specific examples.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
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, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 by those of ordinary skill in the art through specific situations.
As shown in fig. 1-4, this embodiment provides a secondary lithium battery, it includes shell 80, set up the electric core in shell 80 and set up the top cap 10 on shell 80, be provided with negative pole ear and positive pole ear on the electric core, be provided with negative pole post 11 and positive pole post 12 on the top cap 10, the material of negative pole post 11 is aluminium, in this embodiment, the material of positive pole post is aluminium, negative pole post 11 is the same with positive pole post 12 structure, positive and negative poles of top cap all adopt the all-aluminium structure, the material is unified, the all-aluminium material not only has the advantage that the raw materials cost is low, and has advantages such as administrative cost is low. A first connecting sheet 20 and a second connecting sheet 30 are arranged between the battery cell and the top cover 10, the first connecting sheet 20 comprises a first pole connecting part 21 and a first tab connecting part 22 connected with the first pole connecting part 21, the first pole connecting part 21 is connected with the negative pole 11, and the first tab connecting part 22 is connected with the negative pole tab; in this embodiment, the material of the first pole connecting portion 21 is aluminum, the material of the first pole connecting portion 22 is copper, the second connecting piece 30 includes a second pole connecting portion and a second pole connecting portion connected to the second pole connecting portion, the second pole connecting portion is connected to the positive pole 12, the second pole connecting portion is connected to the positive pole, and in this embodiment, the materials of the second pole connecting portion and the second pole connecting portion are aluminum. Thereby first utmost point ear connecting portion 22, second utmost point ear connecting portion, negative pole post 11 and anodal post 12 are the aluminium material, can adopt aluminium and aluminium laser welding, have reduced the welding degree of difficulty between negative pole post and the connection piece, aluminium and aluminium laser welding power are low, and welding effect is better, and the low laser welding equipment of optional power, and equipment investment reduces, has improved production efficiency.
In this embodiment, the first connecting sheet 20 and the second connecting sheet 30 are both in a T shape, the width of the first pole connecting portion 21 is smaller than that of the first pole connecting portion 22, and the width of the second pole connecting portion is smaller than that of the second pole connecting portion, so that the first pole connecting portion 22 and the second pole connecting portion can be connected with the pole lugs of a plurality of battery cells in a staggered manner, the assembly thickness of the pole lugs is reduced, and the space utilization rate of the battery is improved.
In this embodiment, the battery cell includes a first battery cell 40 and a second battery cell 50, and in practical applications, the number of the battery cells may also be 1, 3 or more, specifically, depending on the actual situation, a first battery cell negative electrode tab 41 and a first battery cell positive electrode tab 42 are disposed on the first battery cell 40, a second battery cell negative electrode tab 51 and a second battery cell positive electrode tab 52 are disposed on the second battery cell 50, one end of the first tab connection portion 22 is connected to the first battery cell negative electrode tab 41, the other end is connected to the second battery cell negative electrode tab 51, one end of the second tab connection portion is connected to the first battery cell positive electrode tab 42, the other end is connected to the second battery cell positive electrode tab 52, therefore, when a plurality of battery cells are assembled, the first lug connecting part 22 and the second lug connecting part can be connected with the lugs of the plurality of battery cells in a staggered mode, the assembly thickness of the lugs is reduced, and the space utilization rate of the battery is improved.
When the secondary lithium battery is assembled, the first tab connecting part 22 and the second tab connecting part are connected with the negative tab and the positive tab respectively, and then the first pole connecting part 21 and the second pole connecting part are connected with the negative pole and the positive pole respectively. In this embodiment, the first tab connection portion 22 and the second tab connection portion are first ultrasonically welded to the negative tab and the positive tab, respectively, and then the first tab connection portion 21 and the second tab connection portion are laser welded to the negative post and the positive post, respectively.
The utility model discloses at first through adopting the aluminium material with top cap negative pole post, positive negative pole post material is unified for the top cap, all adopts full aluminium structure, all adopts full aluminium negative pole post, has low in production cost, low in management cost's advantage. Secondly, first connecting piece and negative pole post can adopt aluminium and aluminium laser welding, have reduced the welding degree of difficulty and the welding cost between negative pole post and the connecting piece, and aluminium laser welding power is low, and the welding effect is better, and the low laser welding equipment of optional power, and the equipment investment reduces. Finally, first connection piece includes the first utmost point post link of aluminium material and the first utmost point ear link of copper product to copper and aluminium in the first connection piece can adopt modes such as composite sheet, riveting to link together, and the structure is more stable, is difficult to damage, low in production cost.
The above are merely examples of the features of the present invention, and do not limit the scope of the present invention. All technical solutions formed by adopting equivalent exchanges or equivalent replacements fall within the protection scope of the present invention.
Claims (10)
1. A secondary lithium battery characterized in that: including shell (80), the electric core of setting in shell (80) and top cap (10) of setting on shell (80), the electric core with be provided with first connection piece (20) and second connection piece (30) between top cap (10), be provided with negative pole ear and positive pole ear on the electric core, be provided with negative pole post (11) and positive pole post (12) on top cap (10), the material of negative pole post (11) is aluminium, the negative pole ear passes through first connection piece (20) with negative pole post (11) are connected, positive pole ear passes through second connection piece (30) with positive pole post (12) are connected.
2. A secondary lithium battery as claimed in claim 1, characterized in that: the first connecting sheet (20) comprises a first pole connecting part (21) and a first tab connecting part (22) connected with the first pole connecting part (21), the first pole connecting part (21) is connected with the negative pole (11), and the first tab connecting part (22) is connected with the negative pole; the second connecting piece (30) comprises a second pole connecting part and a second pole lug connecting part connected with the second pole connecting part, the second pole connecting part is connected with the positive pole, and the second pole lug connecting part is connected with the positive pole lug.
3. A secondary lithium battery as claimed in claim 2, characterized in that: when the secondary lithium battery is assembled, the first pole lug connecting part (22) and the second pole lug connecting part are firstly connected with the negative pole lug and the positive pole lug respectively, and then the first pole lug connecting part (21) and the second pole lug connecting part are respectively connected with the negative pole column and the positive pole column.
4. A secondary lithium battery as claimed in claim 3, characterized in that: the first pole lug connecting part (22) and the second pole lug connecting part are respectively connected with the negative pole lug and the positive pole lug through ultrasonic welding, and the first pole lug connecting part (21) and the second pole lug connecting part are respectively connected with the negative pole column and the positive pole column through laser welding.
5. A secondary lithium battery as claimed in claim 2, characterized in that: the material of first utmost point post connecting portion (21) is aluminium, the material of first utmost point ear connecting portion (22) is copper.
6. A secondary lithium battery as claimed in claim 2, characterized in that: the width of the first pole connecting part (21) is smaller than that of the first pole lug connecting part (22), and the width of the second pole connecting part is smaller than that of the second pole lug connecting part.
7. A secondary lithium battery as claimed in claim 2, characterized in that: the battery cell comprises a first battery cell (40) and a second battery cell (50), wherein a first battery cell negative electrode lug (41) and a first battery cell positive electrode lug (42) are arranged on the first battery cell (40), a second battery cell negative electrode lug (51) and a second battery cell positive electrode lug (52) are arranged on the second battery cell (50), one end of a first electrode lug connecting part (22) is connected with the first battery cell negative electrode lug (41), the other end of the first electrode lug connecting part is connected with the second battery cell negative electrode lug (51), one end of the second electrode lug connecting part is connected with the first battery cell positive electrode lug (42), and the other end of the second electrode lug (52) is connected.
8. A secondary lithium battery as claimed in claim 1, characterized in that: the second connecting sheet (30) is made of aluminum.
9. A secondary lithium battery as claimed in claim 1, characterized in that: the positive pole is made of aluminum.
10. A secondary lithium battery as claimed in claim 1, characterized in that: the negative pole column (11) and the positive pole column (12) are identical in structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020554982.XU CN212113919U (en) | 2020-04-15 | 2020-04-15 | Secondary lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020554982.XU CN212113919U (en) | 2020-04-15 | 2020-04-15 | Secondary lithium battery |
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| CN212113919U true CN212113919U (en) | 2020-12-08 |
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| CN202020554982.XU Active CN212113919U (en) | 2020-04-15 | 2020-04-15 | Secondary lithium battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112864541A (en) * | 2021-03-01 | 2021-05-28 | 昆山宝创新能源科技有限公司 | Laminated battery cell, manufacturing method of laminated battery cell and laminated lithium battery |
| CN113964370A (en) * | 2021-09-28 | 2022-01-21 | 天津力神电池股份有限公司 | Power battery with four-electrode-group structure and assembly method thereof |
| CN114284550A (en) * | 2021-12-28 | 2022-04-05 | 蜂巢能源科技股份有限公司 | Assembling method of lithium ion battery and lithium ion battery |
| CN114824600A (en) * | 2022-04-22 | 2022-07-29 | 江苏正力新能电池技术有限公司 | Welding method and preparation method of cylindrical battery and welding structure |
| CN114833446A (en) * | 2022-04-29 | 2022-08-02 | 三一技术装备有限公司 | Full laser welding manufacturing method for battery |
-
2020
- 2020-04-15 CN CN202020554982.XU patent/CN212113919U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112864541A (en) * | 2021-03-01 | 2021-05-28 | 昆山宝创新能源科技有限公司 | Laminated battery cell, manufacturing method of laminated battery cell and laminated lithium battery |
| CN113964370A (en) * | 2021-09-28 | 2022-01-21 | 天津力神电池股份有限公司 | Power battery with four-electrode-group structure and assembly method thereof |
| CN113964370B (en) * | 2021-09-28 | 2024-02-27 | 力神（青岛）新能源有限公司 | Power battery with four-pole group structure and assembling method thereof |
| CN114284550A (en) * | 2021-12-28 | 2022-04-05 | 蜂巢能源科技股份有限公司 | Assembling method of lithium ion battery and lithium ion battery |
| CN114824600A (en) * | 2022-04-22 | 2022-07-29 | 江苏正力新能电池技术有限公司 | Welding method and preparation method of cylindrical battery and welding structure |
| CN114824600B (en) * | 2022-04-22 | 2023-12-05 | 江苏正力新能电池技术有限公司 | Welding method and preparation method of cylindrical battery and welding structure |
| CN114833446A (en) * | 2022-04-29 | 2022-08-02 | 三一技术装备有限公司 | Full laser welding manufacturing method for battery |
| CN114833446B (en) * | 2022-04-29 | 2024-04-30 | 三一技术装备有限公司 | Full laser welding manufacturing method for battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: No.2551, sunshine Avenue, high tech Development Zone, Xinyu City, Jiangxi Province 338000 Patentee after: Jiangxi Ganfeng lithium Technology Co.,Ltd. Address before: No.2551, sunshine Avenue, high tech Development Zone, Xinyu City, Jiangxi Province 338000 Patentee before: JIANGXI GANFENG BATTERY TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.2551, sunshine Avenue, high tech Development Zone, Xinyu City, Jiangxi Province 338000 Patentee after: Jiangxi Ganfeng lithium battery technology Co.,Ltd. Address before: No.2551, sunshine Avenue, high tech Development Zone, Xinyu City, Jiangxi Province 338000 Patentee before: Jiangxi Ganfeng lithium Technology Co.,Ltd. |