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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...
Accurate estimation of battery state of charge (SOC) is essential for battery control and effective energy management of hybrid electric vehicles (HEV). Battery hysteresis poses a big challenge to the estimation of SOC. In the present battery state estimator (BSE), a rule-based hysteresis estimation method for nickel metal hydride (NiMH) batteries is used due to the lack of physical hysteresis models...
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