| 摘要 |
Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus includes a sensor configured to measure an open circuit voltage (OCV m ) of the secondary battery at a first depth of discharge (DOD'), the open circuit voltage (OCV m ) corresponding to a difference between a predetermined original cathode voltage (V c,o ) at the first depth of discharge (DOD') and an anode voltage (V a ), and a control unit configured to calculate an anode voltage (V a ) from the original cathode voltage (V c,o ) and the open circuit voltage (OCV m ), determining that the original anode voltage (V a,o ) is identical to the anode voltage (V a ), determining a second depth of discharge (DOD") corresponding to the original anode voltage (V a,o ), and determining capacity degradation (”capa) of the secondary battery according to a difference between the first depth of discharge (DOD') and the second depth of discharge (DOD"). |
