Patent ID: 9714984
Date: 2017-07-25
CPC Classifications: G01R

Claim:
1. An apparatus for estimating a state of health (SOH) of a battery, the apparatus comprising: a state information sensing unit configured to sense a state of the battery to generate state information; a conversion operation unit configured to convert the state information to an open circuit voltage (OCV) and further configured to estimate a state of charge (SOC) value using the converted OCV; a first SOH estimation operation unit configured to estimate a first state of health (SOH) value using the estimated SOC value; a battery aging factor calculation unit configured to calculate a battery aging factor using the estimated SOC value; a second SOH operation unit configured to calculate a second SOH value using the calculated battery aging factor and a predetermined lookup table; and a filtering unit configured to to generate a third SOH value using the following equation: