| 摘要 |
PROBLEM TO BE SOLVED: To maintain soundness even after a long use, in a battery pack integrated with a plurality of unit cells arranged and connected. SOLUTION: The battery pack includes a plurality of unit cells 1 each having a rectangular sealed metal unit cell case 2 and two voltage terminals protruding from a terminal surface of the unit cell case 2, a spacer 6 arranged between two main surfaces 3 of adjacent unit cells 1 opposing to each other so as to maintain a gap between the main surfaces 3, and a connection part which electrically connects the voltage terminals of different unit cells 1. The spacer 6 has a plurality of protrusions 7 for supporting corner parts of the unit cell case 2 and a through-hole formed at a position opposing to the main surface 3 to avoid an expanded part when the main surface 3 of the unit cell case 2 is expanded by inner pressure of the unit cell case 2. COPYRIGHT: (C)2009,JPO&INPIT |
