Temperature drop and extinguishment liquid cooling device, monitoring system and monitoring method for thermal runaway of power battery

Abstract

The invention relates to a temperature drop and extinguishment liquid cooling device, a monitoring system and a monitoring method for thermal runaway of a power battery. The liquid cooling device comprises a plurality of liquid cooling units, wherein each liquid cooling unit comprises a liquid cooling unit body and a coolant in the liquid cooling unit body; the liquid cooling unit bodies are prepared from high-temperature fusible materials, and tightly bound with the surfaces of corresponding single batteries by respective matched structures; when thermal runaway temperatures of the single batteries exceed fusion points of the high-temperature fusible materials, the liquid cooling unit bodies are fused and then the coolants in the liquid cooling unit bodies enter a battery pack to perform temperature drop cooling or extinguishment on the single batteries. The temperature drop and extinguishment liquid cooling device for the thermal runaway of the power battery is simple in structure, and lower in cost, can effectively monitor and treat the thermal runaway of the power battery of an electromobile, eliminates a potential safety hazard in first time, and ensures the safety and the reliability of an electromobile system.

Description

technical field [0001] The invention relates to the technical field of thermal management of new energy vehicle power batteries, in particular to a power battery thermal runaway cooling and fire extinguishing liquid cooling device, monitoring system and method with the function of battery thermal runaway cooling and fire extinguishing. Background technique [0002] At present, new energy vehicles mainly use ternary lithium-ion batteries and lithium iron phosphate batteries as power sources for power supply. During the use of lithium batteries, the battery will generally generate heat. If the heat cannot be dissipated in time, it will continue to accumulate, which will cause the battery to continue to heat up, which will not only affect the performance indicators of the battery, but also cause battery life. The thermal runaway of the battery is very likely to cause irreversible damage to the battery, or even catch fire, explode, cause a fire, cause a safety accident, and caus...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at thermal runaway of existing new energy vehicle power batteries, which can easily cause safety accidents, resulting in irreparable economic losses and personal safety losses, and currently there is no effective monitoring and effective treatment of existing new energy vehicle power batteries The measure or method for thermal runaway provides a liquid cooling device for thermal runaway cooling and fire extinguishing of a power battery. When the thermal runaway temperature exceeds the melting point of the high-temperature meltable material, the body of the liquid cooling unit melts and the coolant enters the battery pack to cool down the battery cell or extinguish the fire. Safety and reliability of automotive systems

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