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

Abstract

The invention relates to a method and a device for identifying misinformation of thermal runaway of a vehicle battery cell, a storage medium and a vehicle. The method belongs to the field of vehicle-mounted batteries, and comprises the following steps: in response to receiving a thermal runaway alarm, acquiring current battery cell temperatures and battery cell voltages of a plurality of sub-modules in a battery module; determining whether the battery module has a heat conduction phenomenon according to the temperatures of the plurality of battery cells; under the condition of determining thatthe battery module does not generate the heat conduction phenomenon, determining whether the voltage of the battery module is abnormal according to the voltages of the plurality of battery cells; anddetermining that the thermal runaway alarm is a false alarm when it is determined that the battery module does not have the abnormal voltage. According to the method provided by the embodiment of theinvention, whether the received thermal runaway alarm is a false alarm or not can be identified without disassembling the battery by acquiring the battery cell temperature and the battery cell voltage of each sub-module of the battery module, so that the risk of traffic accidents possibly caused when the thermal runaway alarm is the false alarm is avoided.

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

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