Pressure vent-sealed primary and secondary alkaline cells

Details Pressure vent-sealed primary and secondary alkaline cells Pressure vent-sealed primary and secondary alkaline cells

H - Electricity

01

M

319/48

H01M 2/12 (2006.01)

Patent

CA 1067570

PRESSURE VENT-SEALED PRIMARY AND SECONDARY ALKALINE CELLS Abstract of the Disclosure An extrudible hot melt adhesive material is utilized in a low cost vent for an electrochemical cell to relieve abnormal pressure formed during improper use of the cell. The extrudible hot melt adhesive mater- ial is suitably joined or bonded to a member used to provide a cell top, and covers and fills a vent hole formed in the member. Material is ex- truded through the vent hold by abnormal pressure to open the vent hole and allow the abnormal pressure to be released through the opened vent hole. The venting pressure can be predetermined by varying vent hole di- meter, amount of adhesive, and the composition of the filler adhesive material with respect to viscosity.

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