Patent ID: 6489751
Filing Date: 2002-12-03
Classification: H01M,H02J,Y02E

Abstract:
A method of controlling the charging of a rechargeable battery pack, the method comprising:(a) coupling the rechargeable battery pack to a battery charger; (b) fast charging the rechargeable battery pack by providing a fast charging current to the rechargeable battery pack; (c) measuring a battery temperature of the rechargeable battery pack; (d) determining a rate of increase in battery temperature during the fast charging to determine a charge condition of the rechargeable battery pack; and (e) terminating the fast charging when it is determined that the rate of increase in battery temperature is greater than a maximum rate of increase or when it is determined that the increase in battery temperature is rising non-logarithmically, each indicating that the charge condition of the rechargeable battery pack is substantially full.