| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack in which a resin mold is hardly peeled off from the outer circumferential surface and manufacturing cost is low. SOLUTION: The battery pack contains a flat square box-shaped unit cell 1 and a resin mold 2 formed on outer peripheral side surface of the unit cell 1. In order to prevent easy peeling off of the resin mold 2, the outer peripheral side surface of the unit cell 1 is formed in a rough surface part 25 by forming many fine dots on the left side surface 1b coming in contact with the resin mold 2 by laser working. COPYRIGHT: (C)2007,JPO&INPIT |
