Abstract
As the working temperature range of electric vehicles is wide (from -30℃ to 50 ℃), analyzing the performance of energy storage components at different temperatures is a fundamental process for the design of the energy storage system, state estimation algorithm, and optimization of control algorithm. In this paper, a Li(NiCoMn)O2/Graphite battery, a LiMnO4/Li4Ti5O12 battery and a super capacitor are selected as the research objects. The capacity, open circuit voltage, internal resistance and power characteristics are compactly analyzed. After the data unitization was implemented in the form of unit weight and unit volume, our team conduct a comparison of the electrical characteristics of the three energy storage components. Moreover, the appropriate function form for fitting temperature characteristics curve are discussed. The result will provide some support for subsequent electric vehicle power system modeling and SOC/SOE/SOH estimation.
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