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:
Sep. 16, 2025
Filed:
May. 18, 2022
Zhuhai Cosmx Battery Co., Ltd., Zhuhai, CN;
ZHUHAI COSMX BATTERY CO., LTD., Zhuhai, CN;
Abstract
A button cell and a preparation method thereof, where the button cell includes a housing and a roll core; the housing includes a housing body and a top cover assembly, the housing body and the top cover assembly jointly enclose an accommodating cavity for accommodating the roll core; the roll core includes a first tab and a second tab, and the first tab is connected with a bottom wall of the housing body by welding, and the second tab is connected with the top cover; the top cover is provided with an injection hole, the injection hole at least partially overlaps with a cavity of the roll core; a welding mark between the first tab and the bottom wall is located in a portion where the bottom wall overlaps with the cavity and the injection hole.