ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,418,172, issued on Sept. 16, was assigned to Imasen Electric Industrial Co. Ltd. (Inuyama, Japan).
"Vehicle power supply device" was invented by Koichi Yamanoue (Inuyama, Japan) and Daisuke Makio (Inuyama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vehicle power supply device comprises: a first power storage element group having multiple power storage elements connected in series; a second power storage element group connected in series to the positive pole side of the first power storage element group forming a high-voltage DC power supply by being combined with the first power storage element group; an active balancer; a first switching m...