Battery voltage fault detection method and device, medium, vehicle and program product

Abstract

The invention relates to the technical field of battery fault detection, and provides a battery voltage fault detection method and device, a medium, a vehicle and a program product, and the method comprises the steps: obtaining voltage values of all single batteries in a battery pack at different time points in a charging process, and obtaining a first voltage matrix; performing simplification processing on the first voltage matrix to obtain a second voltage matrix; determining a voltage center band of each battery monomer according to the second voltage matrix; determining a voltage deviation matrix according to the second voltage matrix and the voltage center band of each battery monomer; determining a plurality of deviation intervals according to the voltage deviation matrix; according to the voltage deviation matrix and the multiple deviation intervals, a probability matrix is obtained, and the probability matrix comprises probability values of all deviation values of each single battery belonging to each deviation interval; and calculating a discrete entropy value and an index entropy value of the battery pack according to the probability matrix, and carrying out fault detection according to the discrete entropy value and the index entropy value.

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