Patent ID: 9287723
Filing Date: 2016-03-15
CPC Classification: G01R,H01M,H02J,Y02E,Y02T

Claim Text:
1. A cell balancing apparatus using a voltage variation pattern of a battery cell, which balances a state of charge (SOC) of a plurality of cells in a battery, the cell balancing apparatus comprising: an open circuit voltage (OCV) estimating means for measuring a voltage of each cell in the battery and estimating an OCV of each cell using a voltage variation pattern of each cell defined by three output voltages V a cell balancing means for balancing an SOC of each cell by selecting a target cell for balancing through a comparison of the estimated OCV of each cell and controlling a balancing circuit corresponding to the selected cell, the OCV estimating means comprising: wherein wherein g(V wherein “n” is an order index of estimating an OCV variation, and “k” is an order index of a cell.