EV battery testing main terms EV power battery testing has three main elements, namely SOC, SOH and battery life prediction. The relationship between capacity loss L cal per d, the SOC and the temperature of the battery is shown for different temperatures in Fig. 1.
Modern battery test systems continue to evolve, providing new capabilities to address changing technology and business needs. Key battery test technology trends include higher voltages for faster charging, wider power ranges, faster response times to emulate real-world conditions of e-mobility, and more environmental testing with broader adoption.
The main contents of EV battery testing are SOC, SOH and battery remaining life prediction. For SOC, currently, the major manufacturers mainly apply the current integration method. For SOH, currently, the major manufacturers mainly apply the voltage curve fitting method.
Power battery is still one of the key issues that restrict the development of the EV industry . Improving the stability of the vehicle can not only reduce the accident rate of the vehicle, reduce casualties and economic losses, but also improve the traffic conditions and people’s living standards.
On the business side, key trends include declining battery costs, increased use of lithium and alternative materials, shorter design cycles to address increased competition and market growth, and increased outsourcing of testing due to limited talent availability.
To the best of the authors’ knowledge, the contributions of this article are as follows: A complete solution for the whole life cycle online inspection and fault detection of EV batteries is proposed, using the SOC, SOH algorithm and drive method for special scenario application described in the paper.
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