CN215451574U - Cylindrical battery cover plate - Google Patents
Cylindrical battery cover plate Download PDFInfo
- Publication number
- CN215451574U CN215451574U CN202120652410.XU CN202120652410U CN215451574U CN 215451574 U CN215451574 U CN 215451574U CN 202120652410 U CN202120652410 U CN 202120652410U CN 215451574 U CN215451574 U CN 215451574U
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- China
- Prior art keywords
- cover plate
- chamfer
- arc
- cylindrical battery
- aluminum shell
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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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- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to a cylindrical battery cover plate, which can solve the problem of poor coaxiality when the cylindrical battery cover plate is matched with an aluminum shell. Including the apron base plate, the inboard edge of apron base plate sets up interior step, interior step sets up the chamfer, the chamfer is circular-arc. According to the utility model, by adopting the design scheme of enlarging the chamfer of the cover plate and cutting off the arc chamfer part, the extrusion cutting process caused by low concentricity in the assembling process of the cover plate and the aluminum shell can be weakened, the generation of aluminum wires is reduced or even eliminated, the yield of the assembling process can be further improved, the number of large self-discharging battery cells of a PACK end product is ensured, and the problem of corrosion and leakage of an external structural component caused by micro short circuit of an internal negative electrode in the aluminum shell in the subsequent use process of the battery cells is reduced.
Description
Technical Field
The utility model relates to the technical field of power lithium batteries and energy storage lithium batteries, in particular to a cylindrical battery cover plate.
Background
Because the lithium ion battery has higher energy density and longer cycle life, the lithium ion battery is taken as a novel high-efficiency clean energy representative and is widely applied to various aspects such as the energy storage field, the power field, the 3C field and the like. And because the advantages of the cylindrical battery structure in the aspects of safety in the manufacturing process and subsequent PACK utilization and the like, the subsequent development momentum is better. The cylindrical battery structure used in the field of power or energy storage generally comprises a winding core made of a positive electrode and a negative electrode, a positive electrode connecting sheet, a shell, a positive electrode cover plate and a negative electrode cover plate.
SUMMERY OF THE UTILITY MODEL
The cylindrical battery cover plate provided by the utility model can solve the problem of poor coaxiality when the cylindrical battery cover plate is matched with an aluminum shell, namely, the structural design scheme can solve the problem of huge number of internal negative short caused by a large amount of aluminum wires due to too large difference of coaxiality of the cover plate and the aluminum shell in the matching process of the cover plate and the aluminum shell.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the cylindrical battery cover plate comprises a cover plate base plate, wherein an inner step is arranged on the edge of the inner side of the cover plate base plate, the inner step is divided into gaps, a chamfer is arranged on the inner step, and the chamfer is arc-shaped.
Furthermore, the radius range of the arc chamfer is 0.1 mm-0.8 mm, and the optimal chamfer radius is 0.4 mm-0.7 mm.
Further, the length range of the gap is 0 mm-3 mm.
Furthermore, the number of the arc chamfers and the clearance fit is 0-30, and the optimal fit number is 0 or 18-25.
According to the technical scheme, the problem of poor coaxiality when the cylindrical battery cover plate is matched with an aluminum shell can be solved, and the problem of huge internal negative short caused by a large amount of aluminum wires due to too large difference of coaxiality of the cover plate and the aluminum shell in the matching process of the cover plate and the aluminum shell can be solved through the structural design scheme.
The utility model has the advantages that: by adopting the scheme that the optimal cover plate chamfer is matched with the aluminum shell chamfer, aluminum wires generated by relative extrusion cutting between the cover plate and the aluminum shell can be avoided when the cover plate and the aluminum shell matching center in the manufacturing process are not coaxial, the assembly qualification rate of the battery cell and the negative short rate of the subsequent PACK finished product end are effectively improved, and the risk of corrosion and leakage of the battery cell structural member can be reduced.
The design scheme of enlarging the chamfer of the cover plate and cutting off the chamfer part is adopted, so that the extrusion cutting process caused by low concentricity in the assembling process of the cover plate and the aluminum shell can be weakened, the generation of aluminum wires is reduced, the yield of the assembling process can be improved, the number of large self-discharging battery cells of a PACK end product is ensured, and the problem of corrosion and leakage of an external structural component caused by micro short circuit of an internal negative electrode in the aluminum shell in the subsequent use process of the battery cells is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
As shown in figure 1, the cover plate comprises a cover plate base plate 1, wherein an inner step arc chamfer 2 is arranged on the inner side edge of the cover plate base plate 1, the inner step arc chamfer 2 is divided into gaps 3, a chamfer is arranged at the bottom of the inner step arc chamfer, the chamfer is arc-shaped, and the gaps 3 exist between the arc-shaped chamfers.
The matching number of the arc chamfers and the gaps 3 is 0-30, and the optimal matching number is 0 or 18-25.
In the cylindrical battery cover plate, the inner step chamfer angle of the cover plate is increased, so that the extruding and cutting process caused by the fact that the cover plate and an aluminum shell are not coaxial can be weakened or even eliminated, and the generation of aluminum wires is reduced and eliminated.
The radius range of the inner step arc chamfer of the cover plate is 0.1-0.8 mm, and the optimal inner step arc chamfer is 0.4-0.7 mm, so that the matching and peripheral welding reliability is ensured.
In summary, the design scheme of the cover plate fillet removes part of the chamfer on the periphery of the chamfer, so that the direct contact area between the cover plate and the aluminum shell can be reduced, and the aluminum wire can be reduced. Namely, the cover plate enlarges the inner step chamfer, the inner step chamfer is made into a circular arc shape, the periphery of the inner step chamfer is cut off, and the part in direct contact with the cover plate is reduced, so that the extruding and cutting process caused by the non-coaxial condition of the cover plate and the aluminum shell can be weakened, and the generation of aluminum wires is reduced.
Therefore, the design scheme of the chamfer of the cover plate can reduce aluminum wires generated in the assembling process of the aluminum shell and the cover plate, improve the yield of the battery cell, reduce the problem of corrosion and leakage of an external structural part caused by micro short circuit of an internal negative electrode in the aluminum shell in the subsequent use process of the battery cell, and improve the use safety of the cylindrical battery cell.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. The utility model provides a cylinder battery apron, includes apron base plate (1), and inboard edge of apron base plate (1) sets up interior step (2), will interior step (2) subdividing and cut apart formation clearance (3), its characterized in that: the bottom of the inner step is provided with a chamfer which is arc-shaped, and a gap (3) is formed between the arc-shaped chamfers.
2. The cylindrical battery cover plate of claim 1, wherein: the radius range of the arc-shaped chamfer is 0.1-0.8 mm.
3. The cylindrical battery cover plate of claim 1, wherein: the arc length of the gap (3) is 0-3 mm.
4. The cylindrical battery cover plate of claim 2, wherein: the radius range of the arc-shaped chamfer is 0.4-0.7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120652410.XU CN215451574U (en) | 2021-03-30 | 2021-03-30 | Cylindrical battery cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120652410.XU CN215451574U (en) | 2021-03-30 | 2021-03-30 | Cylindrical battery cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215451574U true CN215451574U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120652410.XU Active CN215451574U (en) | 2021-03-30 | 2021-03-30 | Cylindrical battery cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215451574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914336A (en) * | 2023-09-07 | 2023-10-20 | 厦门海辰储能科技股份有限公司 | Single battery, energy storage device and electric equipment |
-
2021
- 2021-03-30 CN CN202120652410.XU patent/CN215451574U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914336A (en) * | 2023-09-07 | 2023-10-20 | 厦门海辰储能科技股份有限公司 | Single battery, energy storage device and electric equipment |
| CN116914336B (en) * | 2023-09-07 | 2024-01-23 | 厦门海辰储能科技股份有限公司 | Single battery, energy storage device and electric equipment |
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