Power battery pack fault diagnosis method and system based on correlation

[0035] Embodiment one, such as figure 1 As shown, this embodiment provides a method for diagnosing short-circuit faults in series-connected power battery packs;

[0036] A method for diagnosing short-circuit faults in a battery pack, comprising the following steps:

[0037] S1: collect the data associated with the parameters with higher correlation between the target power battery and the reference power battery in the power battery pack, and then calculate the correlation between the target power battery and the reference power battery based on the data the true value of the parameter with higher correlation;

[0038] In this embodiment, the higher correlation can be specifically set or selected based on experience or according to specific situations. For example, in some embodiments, a parameter with a parameter correlation greater than a set value may be selected as a parameter with a higher correlation.

[0039] S2: Calculate and obtain the current parameter prediction val

[0069] Embodiment two, such as figure 2 As shown, this embodiment also provides a short-circuit fault diagnosis system for a power battery pack;

[0070] A short-circuit fault diagnosis system for a power battery pack, comprising:

[0071] A data acquisition module configured to: acquire data associated with parameters having a high correlation between the target power battery and the reference power battery in the power battery pack;

[0072] A data processing module, which is configured to: calculate the real value of a parameter having a relatively high correlation between the target power battery and the reference power battery based on the data;

[0073] The parameter prediction module is configured to: calculate and obtain the target power battery according to the real value of the historical parameters of the target power battery and the reference power battery and the current parameter real value of the reference power battery through a correlation-based parameter predi

[0076] Embodiment 3. This embodiment also provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and run on the processor. When the computer instructions are executed by the processor, the computer instructions in Embodiment 1 are completed. steps of the method described above.