Abstract: At present, the batteries used in the large-capacity energy storage power station are mostly the products manufactured by electric vehicle battery production line, so their performance test methods are mostly standard working conditions or electric vehicle driving conditions. Through the analysis on the historical operation data of large-capacity energy storage power station, this paper proposes a design method of large-capacity energy storage power station under typical test condition, which takes the distribution of current amplitude, the change rate of current and the conversion time of charge and discharge as eigenvalue, and comprehensively considers the algebraic sum of energy transfer as zero in a repeat cycle. The total error of the eigenvalue probability distribution is less than 2% between the typical test conditions in the examples and the real operating conditions. Finally, this paper completes the performance degradation laboratory test of lithium battery module based on typical test conditions, which can provide the technical support for the battery selection and performance evalution of energy storage power station.

Key words: energy storage system, probability distribution, typical condition, performance deterioration