Patent ID: 7642753
Filing Date: 2010-01-05
Classification: H02J

Abstract:
1. A battery pack having a plurality of battery cells that works in conjunction with a charging system that supplies a source voltage and a source current and determines a capacity for each of the plurality of battery cells, a desired cutoff current for a select one of the plurality of battery cells having the smallest capacity, and an optimal source cutoff current according to the capacity of the select one of the plurality of battery cells, the battery pack comprising: the plurality of battery cells selectively coupled in parallel; at least one switch responsive to a control signal for selectively decoupling at least the select one of the plurality of battery cells and enabling at least one battery cell among the plurality of battery cells to continue charging; and wherein the plurality of battery cells receive an adjusted source current based on the optimal source cutoff current and the at least one switch is controlled to selectively decouple upon the source current reaching the optimal source cutoff current.