Title:
【発明の名称】防爆形密閉電池
Document Type and Number:
Japanese Patent JP3375434
Kind Code:
B2
Abstract:
PURPOSE: To provide an explosion-proof sealed battery with no separation or cracks in a welded part of a lead fixing member to an explosion-proof valve, high sealing capability, and capable of preventing ignition or explosion of the battery even in overcharge or short circuit. CONSTITUTION: In an explosion-proof sealed battery in which an explosion-proof valve 3 which deforms in the inner pressure direction according to increase in internal pressure is welded to a lead fixing member 1, and a lead 8 is welded to the lead fixing member 1, at least one projection 1c having a tip toward a power generating element is formed on the same circumferential circle in an outer circumferential part of a thin part 1a formed in the lead fixing member 1, and the lead 8 is welded to the projection 1c. Power and pressing force in welding of the lead fixing member 1 and the lead 8 are reduced, and separation of the welded part 5 of the lead fixing member 1 to the explosion-proof 3 or generation of cracks in the welded part 5 in welding of the lead fixing member 1 and the lead 8 are prevented.
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Inventors:
Hiroshi Yamamoto
Tetsuo Kawai
Tetsuo Kawai
Application Number:
JP27581194A
Publication Date:
February 10, 2003
Filing Date:
October 14, 1994
Export Citation:
Assignee:
Hitachi Maxell, Ltd.
International Classes:
H01M2/12; H01M2/34; H01M10/34; (IPC1-7): H01M2/34; H01M2/12
Domestic Patent References:
| JP6251758A | ||||
| JP6203818A | ||||
| JP794161A | ||||
| JP424262U |
Attorney, Agent or Firm:
Tetsuo Miwa