| 摘要 |
<p>In a battery pack formed by arranging a plurality of unit batteries, it is possible to maintain safety and efficiency even after a long use. The battery pack includes: a plurality of unit batteries (1) each having a rectangular-solid sealed metal unit battery case (2) and two voltage terminals protruding from a terminal surface of the unit battery case (2); a spacer (6) arranged between two main surfaces (3) of adjacent unit batteries (1) opposing to each other so as to maintain a gap between the main surfaces (3); and a connection portion which electrically connects the voltage terminals of different unit batteries (1). The spacer (6) has a plurality of protrusions (7) for supporting the corner portions of the unit battery cases (2) and through holes formed at positions opposing to the main surfaces (3) which can receive expanded portions when the main surfaces (3) of the unit battery cases (2) are expanded by inner pressure of the unit battery cases (2).</p> |
