Patent ID: 8384352
Filing Date: 2013-02-26
Classification: H01M,H02J,Y02E

Abstract:
1. A battery voltage balance apparatus, comprising: a timing control unit alternately determining a detecting timing and a balance timing, wherein the detecting timing and the balance timing do not overlap with each other; a balance determining unit coupled to a plurality of battery units coupled in series and the timing control unit, the balance determining units detecting battery voltages of the battery units during the detecting timing to determine whether to start a battery voltage balance process; and a battery voltage balance unit coupled to the battery units, the balance determining unit, and the timing control unit, when the battery voltage balance process starts, the battery voltage balance unit controlling at least one of a charging rate and a discharging rate of the battery unit having a highest battery voltage and at least one of a charging rate and a discharging rate of the battery unit having a lowest battery voltage to have a difference, such that battery voltage difference between any two of the battery units is deceased to within a first predetermined value or a first predetermined percentage.