Abstract
As an important component of electric vehicles, li-ion power battery is the energy supply unit for electric automobile driving. Battery model is the base to research li-ion batteries, and it can reflect the characteristics of battery accurately. Because feature parameters of battery are affected by uncertain factors, such as temperature, it is difficult to establish precise battery model. Therefore, based on the existing equivalent circuit model, this paper presents a temperature combination model for lithium-ion batteries and introduces the influence of temperature to state of charge estimation. Furthermore, this article particularly discuss how to identify parameters of combined model with temperature, so that it can be more close to real response of battery and provide guidance for battery SOC estimation.
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