Chemistry: electrical current producing apparatus – product – and – Plural concentric or single coiled electrode
Patent
1996-02-12
1997-05-20
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Plural concentric or single coiled electrode
429131, 429142, 429194, 429254, H01M 218, H01M 614
Patent
active
056311028
ABSTRACT:
A separator insert used in addition to the main separator in an electrochemical cell, is described. A preferred material for the separator insert is a woven or nonwoven fluropolymeric material such as tetrafluoroethylene-ethylene copolymer (PETFE). This polymeric material is chemically inert to the components used in alkali metal cells, is corrosion resistant and does not decompose at normal battery temperatures. Preferably, the separator insert covers at least each side of the cathode means in a spirally wound electrode stack and extends less than one-half the total length thereof. This provides additional protection against internal short circuit conditions due to tearing or puncture of the traditional separator cause by exposed electrode screens.
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Spillman David M.
Takeuchi Esther S.
Skapars Anthony
Wilson Greatbatch Ltd.
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