Battery SEI film stability detection method and readable storage medium

The invention belongs to the technical field of battery detection, and particularly relates to a battery SEI film stability detection method and a readable storage medium, the battery SEI film stability detection method comprises the following steps: activating a battery through constant current charge and discharge; charging the battery, and acquiring charging data of the battery in a constant-voltage charging stage; drawing a charging curve of the battery in a constant-voltage charging stage according to the charging data so as to judge the stability of the SEI film on the battery; according to the method, the battery cell is activated through low-rate charging and discharging at normal temperature, then the battery is charged to the upper limit voltage in a constant-current mode at high temperature and then charged for a certain time in a low-current and constant-voltage mode, the charging curve of the charging time and the charging capacity is recorded, the stability of the SEI film is accurately judged t