Power battery short circuit detection method and device, vehicle, system and storage medium

Abstract

The invention relates to a power battery short circuit detection method and device, a vehicle, a system and a storage medium. The technical problems of alarm missing, low detection result accuracy, low real-time performance and the like during power battery short circuit detection can be solved. The method comprises the following steps that characteristic data in a power battery in the vehicle areacquired, wherein the characteristic data comprises current, voltage, battery capacity and module temperature of a single battery; data cleaning and segmentation are performed on the characteristic data to obtain a plurality of data segments; according to the timestamp sequence of each data segment, the following operations are sequentially executed on each data segment, namely, whether the battery capacity contained in the data segment reaches a capacity threshold value or not is judged; under the condition that the battery capacity reaches the capacity threshold value, whether the voltage difference between the maximum voltage and the minimum voltage of the single battery in the data segment is greater than a corresponding voltage difference threshold value or not is judged according tothe state of the vehicle; and under the condition that the voltage difference is greater than the corresponding voltage difference threshold, the data segment is output and short-circuit alarm is carried out.

Description

technical field [0001] The present disclosure relates to the technical field of batteries, in particular, to a power battery short-circuit detection method, device, vehicle, system and storage medium. Background technique [0002] With the rapid development of new energy industries such as electric vehicles and energy storage batteries, lithium-ion batteries have become the mainstream of power batteries, and the safety and reliability of power batteries are directly related to the safe use of new energy products such as electric vehicles and energy storage batteries. Among them, the internal short circuit of the power battery is a safety-related problem during the use of the power battery. The internal short circuit of the battery will cause the thermal runaway of the battery, causing sudden safety accidents such as fire and explosion. Therefore, the early detection of the internal short circuit fault can minimize the damage Or provide sufficient processing time to eliminate...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present disclosure is to provide a power battery short-circuit detection method, device, vehicle, system, and storage medium to solve technical problems such as false positives during power battery short-circuit detection, low accuracy of detection results, and low real-time performance in related technologies.

Images