Patent ID: 9118191
Filing Date: 2015-08-25
Classification: H02J

Abstract:
1. A method of balancing a plurality of battery cells, the method comprising: acquiring by a controller, an, open circuit voltage (OCV) of a battery cell of the plurality of battery cells connected in series; determining, by the controller, a state of charge (SOC) of the battery cell based on the OCV of the battery cell; determining, by the controller, a value (ΔOCV/ΔSOC) corresponding to a change in the OCV (ΔOCV) of the battery cell per a change of the SOC (ΔSOC) of the battery cell, in accordance with the SOC of the battery cell; and activating, by the controller, cell balancing of the plurality of battery cells when the value (ΔOCV/ΔSOC) is greater than a reference value.