To provide a nonaqueous electrolyte secondary battery comprising a current interrupting mechanism and excellent in impact resistance and vibration resistance.
The nonaqueous electrolyte secondary battery comprises an electrode body received in an outer can; a sealing plate 3 sealing the opening of the outer can; a collector tab member 9 connected to positive and negative electrodes; an external electrode terminal 1 projecting outward from the sealing plate 3; a diaphragm 6 disposed inside the sealing plate 3 and outside the collector tab member 9, electrically connected to the external electrode terminal 1, and configured to be deformed to uplift the center portion outward when the internal pressure of the battery rises; a brittle portion bonded to the inner side of the diaphragm 6 at the center, connected to the collector tab member 9 at the periphery, and configured to break to interrupt the current to the diaphragm 6 when the diaphragm is deformed and uplifted; and a collector tab holder 7 into which a portion of the collector tab member 9 is inserted. The collector tab holder 7 and an insulating plate 4 are fixed by fitting a hook 4a of the insulating plate 4 into a fixing portion 7b of the collector tab holder 7.
NAKANISHI NAOYA
NOMA TOSHIYUKI
| JP2008066254A | 2008-03-21 | |||
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| JP2008066255A | 2008-03-21 |
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