TY - GEN
T1 - An improved Ampere-hour method for battery state of charge estimation based on temperature, coulomb efficiency model and capacity loss model
AU - Wu, Guoliang
AU - Lu, Rengui
AU - Zhu, Chunbo
AU - Chan, C. C.
PY - 2010
Y1 - 2010
N2 - Coulomb efficiency and available capacity affect the precision of Ampere-hour method. Both coulomb efficiency and available capacity vary with temperature and discharge current rate. In this study, some experiments of a 27Ah Nickel Metal Hydride battery were undertaken to determinate the coulomb efficiency. These experiments were undertaken at -18°C, -12°C, 0°C, 25°C with 1/3C, 1C, 3C charge rate and 1/3C discharge rate. Then, an improved coulomb efficiency model was proposed, which is based on temperature and charge rate. Moreover, an available capacity loss model was built based on experiments of 1/3C discharge rate at -18°C, -12°C, 0°C, 25°C. In addition, an improved Ampere-hour method based on temperature, coulomb efficiency and capacity loss model was built to estimate battery state of charge. The proposed method is verified by experiment and the result shows good precision.
AB - Coulomb efficiency and available capacity affect the precision of Ampere-hour method. Both coulomb efficiency and available capacity vary with temperature and discharge current rate. In this study, some experiments of a 27Ah Nickel Metal Hydride battery were undertaken to determinate the coulomb efficiency. These experiments were undertaken at -18°C, -12°C, 0°C, 25°C with 1/3C, 1C, 3C charge rate and 1/3C discharge rate. Then, an improved coulomb efficiency model was proposed, which is based on temperature and charge rate. Moreover, an available capacity loss model was built based on experiments of 1/3C discharge rate at -18°C, -12°C, 0°C, 25°C. In addition, an improved Ampere-hour method based on temperature, coulomb efficiency and capacity loss model was built to estimate battery state of charge. The proposed method is verified by experiment and the result shows good precision.
KW - Ampere-hour
KW - Available capacity
KW - Capacity loss
KW - Coulomb efficiency
KW - Nickel metal hydride battery
KW - State of charge
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=79953135868&partnerID=8YFLogxK
U2 - 10.1109/VPPC.2010.5729017
DO - 10.1109/VPPC.2010.5729017
M3 - Conference article published in proceeding or book
AN - SCOPUS:79953135868
SN - 9781424482191
T3 - 2010 IEEE Vehicle Power and Propulsion Conference, VPPC 2010
BT - 2010 IEEE Vehicle Power and Propulsion Conference, VPPC 2010
T2 - 2010 IEEE Vehicle Power and Propulsion Conference, VPPC 2010
Y2 - 1 September 2010 through 3 September 2010
ER -