ALEXANDRIA, Va., May 5 -- United States Patent no. 12,620,650, issued on May 5, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Power storage device" was invented by Kotaro Horiguchi (Nagoya, Japan), Ryota Aoki (Okazaki, Japan), Shinichiro Mori (Okazaki, Japan) and Kazunari Hiromori (Miyoshi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A power storage device includes: a power storage stack including a first cell group, a second cell group, and a middle plate; a lower case having a bottom wall portion; a first heat conduction member disposed between the first cell group and the bottom wall portion; and a second heat conduction member disposed between the second cell group and the bottom wall po...