Patent ID: 11959973
Assignee: SHANDONG UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The multi-fault diagnosis method for battery packs based on corrected sample entropy according to claim 1, wherein constructing the cell voltage sequence according to the measured cell voltages of the battery pack to be diagnosed and calculating the sample entropy value of the cell voltage sequence comprise the specific steps:
constructing a time series by adopting N cell voltage data according to the measured cell voltages of the battery pack to be diagnosed, and constructing a cell voltage vector with N as a sliding window;
calculating a first probability of matching of two time series of an m window length and a second probability of matching of two time series of an m+1 window length; and
calculating a sample entropy value according to the first probability and the second probability, wherein the sample entropy value is a conditional probability of matching of the time series of the m+1 window length when the time series of the m window length are matched within a tolerance r.