ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,725,837, issued on Sept. 1, was assigned to Ningde Amperex Technology Ltd. (Ningde, China).

"Electrochemical device" was invented by Qiang Zheng (Ningde, China), ZhanZhao Fang (Ningde, China) and Qi Dang (Ningde, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electrochemical device, including a cell and a shell enclosing the cell; the cell includes a jelly roll including a first electrode and a second electrode spaced from each other, a separator is disposed between the first electrode and the second electrode, the first electrode and the second electrode are wound to form the cell; the first electrode includes a first current collector, the fi...