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LITHIUM ION BATTERY WITH IMPROVED SAFETY THROUGH USE OF INTERNAL PTC

IP.com Disclosure Number: IPCOM000008904D
Original Publication Date: 1999-Jan-01
Included in the Prior Art Database: 2002-Jul-23

Publishing Venue

Motorola

Related People

Authors:
Mike Fulcher Paul Gies Jason Howard

Abstract

Lithium-ion battery technology has several unique safety concerns relative to traditional aque- ous battery chemistries. Under abuse conditions, a lithium ion cell may overheat, leading to ignition of the flammable organic electrolyte in the cell. Examples of common abuse conditions are 1) short- circuit, creating very high currents in the cell; and 2) overcharge, where continuous charging above the cell voltage limit leads to thermal runaway.