Patent ID: 11906590
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  B | IPC B  G  H

Claim 6:
7. The method according to claim 1, wherein the determining, based on the voltage variation value, whether the lithium battery is abnormal comprises:
obtaining a third current value of the charge current at an arbitrary time point prior to each time of changing the charge current, and a fourth current value of the charge current at an arbitrary time point within the time period of maintaining the charge current changed each time;
calculating an absolute value of a difference between the third current value and the fourth current value; and
calculating a ratio of the Nth voltage variation value to the absolute value, and recording the ratio as an Nth third resistance variation value; and
obtaining an Nth data point based on the Nth third resistance variation value and a corresponding SOC value; and
determining, based on the data point, whether the lithium battery is abnormal.