ALEXANDRIA, Va., July 3 -- United States Patent no. 12,348,029, issued on July 1, was assigned to Hitachi Energy Ltd (Zurich, Switzerland).

"Auxiliary power supply for energy storage systems" was invented by Mohsen Asoodar (Solna, Sweden), Lexuan Meng (Vasteras, Sweden), Tong Wu (Vasteras, Sweden), Jean-Philippe Hasler (Vasteras, Sweden) and Gunnar Ingestrom (Vasteras, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is disclosed herein an energy storage system comprising an energy storage circuit, comprising a string of interconnected energy storage units configured to store electrical energy and provide power to a power grid using said stored electrical energy. The ESS further comprises an auxil...