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A Method for Preventing Lithium Battery Thermal Charge Terminations in a Lithium Battery Charger

IP.com Disclosure Number: IPCOM000029487D
Original Publication Date: 2004-Jun-30
Included in the Prior Art Database: 2004-Jun-30
Document File: 5 page(s) / 231K

Publishing Venue

Motorola

Related People

Authors:
Marc B. Riley Taneka Frazier Martin Ramsden

Abstract

Lithium battery chargers are intelligent chargers. When charging lithium battery packs, the charger can indicate a “waiting to charge” state to the end user. This “waiting to charge” state is often the result of a battery heating up beyond the maximum allowed threshold for charging. Ambient temperature has a significant effect on TCO “temperature cutoff”. However, there are often cases when the heat contributed by the charger causes the battery to TCO in slightly elevated ambient conditions. When a TCO occurs it can lead to increased charge times and user dissatisfaction. Currently there is no simple method to prevent a lithium battery from TCO when the heat from the charger is the culprit for the early termination. This technique is a method for preventing TCO without adding additional hardware or software to the battery pack.