The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2026
Filed:
May. 06, 2021
Suzhou Slac Precision Equipment Co., Ltd, Jiangsu, CN;
SUZHOU SLAC PRECISION EQUIPMENT CO., LTD, Suzhou, CN;
Abstract
A punch and a die for stretching battery case body and its stretching process. The die includes a stepped punch as a male die, at least one thinning ring as a female die, and a variable-wall-thickness stretching step, which belongs to the thinning stretching. When the sheet or plate is stretched to the cup-shaped stretching piece by at least one-time forming stretching, and then through the thinning stretching to finally obtain the variable-wall-thickness battery case body with thin wall in the middle and thick wall at one end or both ends in the axial direction. The body can reduce the material consumption of the middle section of the case body and ensure the roll-sealing strength of one end or both ends, thus solving the problem between the amount of materials and the reliability of the roll sealing caused by the wall thickness of the battery case body.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile