Closed secondary battery and its manufacturing method

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...

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Details

429171, 429174, 429178, 429181, 429185, H01M 208

Patent

active

061034185

ABSTRACT:
A closed secondary battery having a sealing structure for preventing electrolyte leak for a long period is presented. An annular packing is chemically bonded in a ring form to the surface of a disk-shaped flange formed inside of a battery of a terminal pole projecting from inside to outside of the battery, by penetrating through a cover member of closed secondary battery. Fitting an annular spring while pulling the terminal to outside of the battery, the terminal pole is fixed in the cover member. At this time, the annular packing is compressed against the cover member, and the passage of electrolyte leak is shut by this compression.

REFERENCES:
patent: 3986514 (1976-10-01), Cannon
patent: 5462820 (1995-10-01), Tanaka
patent: 5856041 (1999-01-01), Inoue et al.
Copy of European Search Report dated Jan. 28, 1998 for EP 97 30 7447.

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