Patent ID: 8222870

Claim:
A battery management system comprising: a monitoring circuit for monitoring a battery pack that comprises a plurality of cells and for checking an unbalanced condition of said cells in each cycle of a plurality of cycles; and a charger external to said battery pack and operable for generating a charging current at an output terminal of said charger to said battery pack and for receiving monitoring information from said monitoring circuit, and for adjusting said charging current at said output terminal from a first level in a previous cycle to a second level that is lower than said first level in response to a detection of said unbalanced condition of said cells in a current cycle, wherein said monitoring circuit is further capable of checking an undesirable condition of said battery pack in each cycle of said plurality of cycles, and wherein said charger is further capable of adjusting said charging current from said first level in said previous cycle to a third level that is lower than said first level in response to a detection of said undesirable condition in a current cycle.