| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a battery pack having a plurality of cells connected in parallel in which variations in capacity due to deterioration of cells can be reduced. <P>SOLUTION: In the battery pack in which a plurality of cells C1-C4 are connected in parallel, the trend of temperature increase of the cells C1-C4 constituting the battery pack depends on the heat radiation condition, calorific value, and environmental temperatures. When the cells C1-C4 are laminated, the temperatures of the cells C2-C3 on the inner side where radiation efficiency is low becomes higher than the temperatures of the cells C1, C4 on the outer side. Then, by connecting tabs 1b, 1c in parallel through bus bars 2a-2c and 3a-3c, the connection resistance of cells C2, C3 is made larger than the connection resistance of cells C1, C4. As a result, the current values of the cells C2, C3 become smaller than the current values of the cells C1, C4, and variations in the capacity due to the deterioration is reduced. <P>COPYRIGHT: (C)2004,JPO</p> |
