| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat type battery with terminals for preventing an internal short circuit while lithium to constitute the negative electrode is liquified and contacts a positive electrode through a separator due to heat concentration to a negative electrode containing lithium when welding a negative electrode terminal. SOLUTION: In the flat battery, the negative electrode 15 containing lithium, the positive electrode 16, an organic electrolytic solution, and the separator 18 are air-tightly sealed by a sealing plate 11, a gasket 19, and a positive electrode case 12. A negative electrode terminal 20 is welded to the sealing plate 11, and by installing a heat diffusion material 13 such as a graphite sheet having conductivity between the negative electrode 15 and an inside plane part of the sealing plate 11, suppression of heat concentration to the negative electrode 15 when welding the negative electrode is achieved, and the internal short circuit caused by liquefaction of lithium is prevented. COPYRIGHT: (C)2009,JPO&INPIT
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