ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,500,315, issued on Dec. 16, was assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) Ltd. (Hong Kong).

"Battery cell, battery, electric apparatus, manufacturing method of battery cell, and manufacturing apparatus of battery cell" was invented by Huasheng Su (Ningde, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a battery cell, a battery, an electric apparatus, a manufacturing method and apparatus of a battery cell. Where the battery cell includes an electrode assembly, a pressure relief mechanism, and an end cover. A concave part on the end cover is recessed from one side, away from the electrode assembly, of t...