| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery preventing corrosion of terminals even when terminals made of different kind metals are joined, and to provide a battery pack and connection joint between different kind metals. SOLUTION: A secondary battery 1 has an electrode body 11, a negative terminal 13 whose inner end is connected to the electrode body 11, a positive terminal 12 whose inner end is connected to the electrode body 11, having self-potential lower than that of metal constituting the negative terminal 13, an insulating film 15 partially covering a position between the inner end and the outer end of the both terminals 12, 13, and a laminate film 14 covering and sealing the whole part of the electrode body 11 and a part of the insulating film 15, an aluminum cover 18 formed with metal constituting the positive terminal 12 is installed on the whole surface of a part exposed to the outside from the insulating film 15 out of the negative terminal 13, an edge of the aluminum cover 18 is positioned outside than innermost side in a region where the negative terminal 13 and the insulating film 15 come in contact each other. COPYRIGHT: (C)2006,JPO&NCIPI
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