Method for evaluating battery performance based on Delphi method and grey relation theory

The invention relates to a method for evaluating battery performance based on a Delphi method and the grey relation theory. The method comprises the steps of determining evaluation indexes of the battery performance, setting up an analytical sequence, utilizing the Delphi method for determining the weight of factors affecting the battery performance, conducting dimension removal processing on actual values and ideal values of indexes of a battery to be evaluated, determining a reference matrix, setting up a grey relation model of battery comprehensive performance evaluation, obtaining the relation coefficient Xi0i(k) between the kth evaluation index of the ith evaluation object and the reference value according to grey correlation analysis, calculating the relation coefficient, and obtaining the relation degree of the battery according to the grey relation model of the battery comprehensive performance and the weight determined by the Delphi method. According to the technical scheme, a multi-index comprehensive evaluation method is provided for the performance evaluation of the battery, the one-sidedness of serving the single index as the evaluation criterion is overcome, and the reliable evaluation method is provided for the performance evaluation, screening and matching of the battery.