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TIME-BASED TEMPERATURE INFLECTION TERMINATION ALGORITHM FOR NICD/NIMH BATTERY CHARGER

IP.com Disclosure Number: IPCOM000008372D
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2002-Jun-11

Publishing Venue

Motorola

Related People

Authors:
Brian Pozsgay Martin Ramsden Dale Tittensor

Abstract

In battery and battery charger design, the thermistor within the battery pack connects to the microcontroller's analog-to-digital (A/D) port such that a temperature range spanning 90°C can be accurately read. An R-bit AID provides significant resolution (approximately 0.4"Cibit). However, the temperature swing of a battery under rapid charge is typically less than 20°C (50 bits) over 90 minutes.