Patent ID: 11867765
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 14:
15. A non-transitory computer-readable storage medium comprising instructions which, when executed by a processor, cause the processor to perform operations, the operations comprising:
obtaining a target initial battery parameter value of a target battery at an initial moment, and determining a reference initial battery parameter value of a virtual reference battery at the initial moment, wherein a response of the virtual reference battery is identical to a response of the target battery when an identical excitation condition is given, wherein the virtual reference battery includes an electrochemical model or an equivalent circuit model representative of the target battery, wherein the electrochemical model or the equivalent circuit model is updatable based on an aging parameter of the target battery to determine a different reference initial battery parameter value at the initial moment, wherein the initial moment is a moment of initialization for the virtual reference battery;
obtaining a target battery parameter value of the target battery at a specified moment, wherein the target battery parameter value comprises a target terminal voltage value of the target battery, a current value of the target battery, and a temperature parameter value of the target battery;
determining a reference battery parameter value of the virtual reference battery at the specified moment based on the target battery parameter value and the reference initial battery parameter value comprising: determining a state-of-charge change value of the virtual reference battery within a duration between the specified moment and the initial moment (ΔT0) based on the current value of the target battery and the temperature parameter value of the target battery, and determining a reference remaining battery capacity of the virtual reference battery based on an initial state-of-charge value of the reference initial battery parameter value of the virtual reference battery; and
calculating a difference between the target battery parameter value and the reference battery parameter value, and determining, based on the difference, that the target battery is micro-short-circuited,
wherein the specified moment comprises a first moment and a second moment, and wherein determining, based on the difference, that the target battery is micro-short-circuited further comprises:
calculating a target difference between a second battery capacity difference corresponding to the second moment and a first battery capacity difference corresponding to the first moment, and determining a ratio of the target difference to duration between the second moment and the first moment as a leakage current value of the target battery.