| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a battery pack having a large discharge capacity and a prolonged cycle lifetime even when it is charged at high temperature or under heavy current. SOLUTION: This battery pack made by assembling a plurality of cells C1,..., C10 is provided with a cooling device 1 for cooling a battery pack 40 in charging. The cells C1, C2, C9 and C10 arranged in the end part having high heat radiation efficiency in the battery pack 40 supply power to the cooling device 1. The cells C5 and C6 arranged in the medial portion having low heat radiation efficiency in the battery pack 40 are cooled by the cooling device 1.</p> |
