ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,476,259, issued on Nov. 18, was assigned to ZHUHAI COSMX BATTERY Co. LTD. (Zhuhai, China).
"Lithium ion secondary battery" was invented by Jiao Li (Zhuhai, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lithium ion secondary battery includes a negative electrode plate and an electrolyte, the negative electrode plate including a negative electrode current collector and a negative electrode active layer, where a content of a chromium element in the negative electrode current collector is in a range of 10-300 ppm, and a groove is provided in a surface of the negative electrode active layer away from the negative electrode current collector, the gro...