Patent ID: 9368979
Filing Date: 2016-06-14
CPC Classification: B60L,H02J,Y02T

Claim Text:
1. A battery system comprising: a plurality of battery cells having a plurality of cell voltages; and a balancing module coupled to said plurality of battery cells and configured to specify a first voltage threshold and a second voltage threshold less than said first voltage threshold according to an amount of a charging current supplied to said battery cells in a constant current charging mode, determine whether a battery cell of said battery cells operates outside of a voltage range, said voltage range ranging from said second voltage threshold to said first voltage threshold and comprising a flat voltage region determined by said amount of said charging current, by comparing a cell voltage of said battery cell with said first and second voltage thresholds, perform balancing of said battery cells if said balancing module determines that said battery cell operates outside of said voltage range, and disable balancing of said battery cells if said balancing module determines that said battery cells operate in said voltage range, wherein an increasing rate of said cell voltage when said battery cell operates in said flat voltage region is less than an increasing rate of said cell voltage when said battery cell operates outside of said flat voltage region.