Storage battery performance identification method and device, computer equipment and storage medium

The invention relates to a storage battery performance identification method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a battery internal resistance parameter data set of a to-be-tested storage battery in a first preset time period and a battery voltage parameter data set of the to-be-tested storage battery in a second preset time period, the battery internal resistance parameter data set being obtained by sampling the to-be-tested storage battery in a floating charge mode according to a first sampling frequency; the battery voltage parameter data set is obtained by sampling a to-be-detected storage battery in an equalized charging mode according to a second sampling frequency, and analyzing the battery internal resistance parameter data set and the battery voltage data set according to a preset multi-level data analysis rule and a CUSUM algorithm to obtain performance degradation storage battery identification results of different dimensions. And