Method, device, storage medium and vehicle for identifying false alarms of vehicle battery thermal runaway

Abstract

The present disclosure relates to a method, a device, a storage medium and a vehicle for identifying a false alarm of thermal runaway of a vehicle battery cell. Belonging to the field of vehicle batteries, the method includes: in response to receiving a thermal runaway alarm, acquiring the current cell temperature and cell voltage of multiple sub-modules in the battery module; Whether heat conduction occurs in the battery pack; in the case of determining that no heat conduction occurs in the battery module, determine whether there is a voltage abnormality in the battery module according to a plurality of the cell voltages; determine that there is no voltage in the battery module In an abnormal situation, it is determined that the thermal runaway alarm is a false alarm. The technical solution provided by the embodiments of the present disclosure can identify whether the received thermal runaway alarm is a false alarm by obtaining the cell temperature and cell voltage of each sub-module of the battery module without dismantling the battery, thereby avoiding thermal runaway. An alarm is a danger that may lead to a traffic accident when a false alarm is issued.

Description

technical field [0001] The present disclosure relates to the field of vehicle batteries, in particular, to a method, device, storage medium and vehicle for identifying false alarms of thermal runaway of vehicle battery cells. Background technique [0002] Thermal runaway of battery modules is the most dangerous failure mode of new energy vehicles. Thermal runaway is the uncontrollable temperature rise of battery cells caused by the exothermic reaction of the internal sub-module monomers. Because thermal runaway occurs for a short time and is extremely harmful, a particularly urgent treatment strategy for thermal runaway is adopted in the related art, that is, to immediately cut off the input and output of the energy of the battery cell, and prevent the discharge and charge of the battery cell. However, in the related art The authenticity of the thermal runaway alarm cannot be accurately judged. If the vehicle is driving at a high speed, a false alarm is caused for some reaso...

AI Technical Summary

Problems solved by technology

Because thermal runaway occurs for a short time and is extremely harmful, a particularly urgent treatment strategy for thermal runaway is adopted in related technologies, that is, to immediately cut off the energy input and output of the battery cell, and prevent the discharge and charging of the battery cell. The authenticity of the thermal runaway alarm cannot be accurately judged. If the vehicle is driving at a high speed, a false alarm is caused for some reason, and the power source of the vehicle is cut off. At this time, the probability of a traffic accident will greatly increase.

In addition, inspectors need to remove and disassemble the battery module, and then confirm the actual internal conditions to determine whether the thermal runaway alarm is a false alarm. This method is time-consuming and laborious, and the inspector will bear certain security risks

Images