Polymerizable additives for making non-aqueous rechargeable lith

Details Polymerizable additives for making non-aqueous rechargeable lith Polymerizable additives for making non-aqueous rechargeable lith

1998-01-12

2000-06-13

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

With control means responsive to battery condition sensing...

429 62, 429 57, 429324, 429327, 429328, H01M 200, H01M 1008

Patent

active

060747765

ABSTRACT:
After undergoing overcharge abuse, non-aqueous rechargeable lithium batteries can be left in a relatively hazardous state of charge, representing a safety concern with respect to subsequent thermal or mechanical abuse. Electrolyte additives which electrochemically form conductive polymers can be used to create a short circuit inside the battery as a result of overcharge abuse and automatically discharge the battery internally. The invention is particularly suitable for batteries equipped with electrical disconnect devices which cannot be discharged externally after the disconnect has activated. Aromatic compounds such as biphenyl are particularly suitable additives.

REFERENCES:
patent: 5609974 (1997-03-01), Sun
patent: 5776627 (1998-07-01), Mao et al.
patent: 5879834 (1999-03-01), Mao
patent: 5891592 (1999-04-01), Mao et al.

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