Bi-cell separation for improved safety

Details Bi-cell separation for improved safety Bi-cell separation for improved safety

1998-05-15

1999-05-11

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Plural cells

429306, 429316, H01M10/40

Patent

active

059026979

ABSTRACT:
Disclosed herein is a safety feature for batteries comprising an integrated series of lithium-ion bi-cells. Each individual bi-cell comprises, sequentially, an anode, a film separator, a cathode, a film separator, and an anode. When multiple bi-cells are joined within a single package an insulator element, preferably an electrolyte permeable insulator element, is placed between anode elements of adjoining bi-cells. This insulator element appears to restrict internal shorting during crushing of the battery, thus avoiding undesirable effects of shorting such as thermal run-away and producing a safer battery.

REFERENCES:
patent: 5173376 (1992-12-01), Page et al.
patent: 5288565 (1994-02-01), Gruenstern
patent: 5587253 (1996-12-01), Gozdz et al.

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