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An accurate assessment of the temperature distribution on the surface of the battery can be instrumental in prediction of the health and remaining lifetime in the battery/battery storage unit. Close monitoring of operational conditions and health can lead to significant saving in the overall cost and reliability of the targeted application. In this paper a new method for estimation of an effective...
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...
An automatic equivalent-circuit parameter-estimation system for a Lithium-ion battery including battery temperature controller is developed in this paper. The system consists of a thermostatic chamber and estimating programs for parameters of an internal voltage and of an internal impedance, which is expressed by two resistors and a capacitor. These resistances increases by more than 60% and above,...
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