Patent 7648538 was granted and assigned to NISSAN MOTOR CO.,LTD. on January, 2010 by the United States Patent and Trademark Office.
Unit cells are held in a plate frame to form a cell module. A plurality of the cell modules is laminated in a thickness direction of the frame to form a laminated structure of unit cells. The cell unit is pressurized with heat sinks from both sides in the direction of the lamination, and is integrally held to form a battery.