Patent 7429431 was granted and assigned to NISSAN MOTOR CO.,LTD. on September, 2008 by the United States Patent and Trademark Office.
A battery is provided with a support body, a surface of the support body, a plurality of unit cells located inside the support body, and an opening portion communicating between an inside and an outside of the support body. A resonance is allowed in the surface of the support body and the opening portion is provided in the surface of the support body at a region involving a loop position of the resonance.