Title:
NECKING METHOD, NECKING DEVICE AND BATTERY MANUFACTURING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/221077
Kind Code:
A1
Abstract:
Provided in the present application are a necking method, a necking device and a battery manufacturing apparatus. The necking method is used for forming a necking part at a shell, and the shell is provided with an opening end. The necking method comprises: forming an annular groove in a shell, wherein the annular groove extends in a circumferential direction of the shell; and widening the annular groove towards the opening end, so as to form a necking part. The technical solution of the present application can effectively reduce the deformation amount of a shell, ensure the safety of an electrode assembly, and improve the performance stability of a battery cell; in addition, performing a pre-necking treatment on the shell can effectively reduce the risk of the shell deforming and restoring after a necking part is formed, thereby improving the machining precision and structural stability of the necking part.
Inventors:
PAN YOUCHENG (CN)
JIANG LIANG (CN)
MENG HAO (CN)
JIANG LIANG (CN)
MENG HAO (CN)
Application Number:
PCT/CN2022/094042
Publication Date:
November 23, 2023
Filing Date:
May 20, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M50/107; B21D19/04; B21D19/08
Foreign References:
| US4781047A | 1988-11-01 | |||
| JPH06210379A | 1994-08-02 | |||
| JPH10216873A | 1998-08-18 | |||
| JP2011204589A | 2011-10-13 | |||
| JPH08117907A | 1996-05-14 |
Attorney, Agent or Firm:
BEIJING WEIFEI LIANCHUANG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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