Title :
A new estimation method of state of charge using terminal voltage and internal resistance for lead acid battery
Author :
Sato, Shinya ; Kawamura, Atsuo
Author_Institution :
Dept. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
Abstract :
The accurate state of charge (SOC) is required for the battery for electric vehicles. Various estimation methods for the SOC of the lead acid battery have been proposed. However, any method cannot accurately predict the residual capacity. A new estimation method of the SOC on the lead acid battery is proposed. This method is based on the terminal voltage and the internal resistance of the battery. This proposed equation can decrease the estimation error for the little SOC region. We conducted discharge experiments for the lead acid battery and compared the former method with the proposed new method
Keywords :
electric resistance; lead acid batteries; parameter estimation; testing; Pb; Pb-acid battery; electric vehicles; estimation error reduction; internal resistance; residual capacity prediction; state of charge estimation method; terminal voltage; Batteries; Electric resistance; Electric vehicles; Equations; Estimation error; Internal combustion engines; Lead; Power supplies; State estimation; Voltage;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.997578
