| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery having a cleavage groove for discharging outside the gas inside the battery in which the opening area formed by cleaving of the cleavage groove is made large, and leakage of the electrolyte caused by unnecessary cleavage is prevented. SOLUTION: This is the sealed battery that comprises an outer package can formed of a cleavage groove that cleaves at expansion of the battery, an electrode body housed in the outer package can, a sealing body for sealing the opening of the outer package can. The above cleavage groove is provided on the outer surface of the outer package can and is provided at the position that crosses two or more protruded ridgelines formed on that face at expansion of the battery. COPYRIGHT: (C)2004,JPO
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