Power battery thermal management system capable of passively processing thermal runaway

Abstract

The invention provides a power battery thermal management system capable of passively treating thermal runaway. The system is applied to the technical field of new energy automobile power batteries. A carbon dioxide pump air conditioner (5) of the power battery thermal management system capable of passively treating thermal runaway is communicated with a module internal channel (17) in a battery module (1); the battery module (1) comprises a plurality of battery cells (14); each battery cell (14) is internally provided with an in-module high-pressure carbon dioxide pipeline (13); each in-module high-pressure carbon dioxide pipeline (13) is communicated with the in-module channel (17); and the end of each in-module high-pressure carbon dioxide pipeline (13) is provided with a hot melting material nozzle (12). According to the power battery thermal management system capable of passively processing thermal runaway, a refrigerant (supercritical carbon dioxide) is applied to a battery thermal runaway passive safety system, so that the concentration and the temperature of combustible gas can be effectively and quickly reduced to be within the range of combustion and explosion when a battery cell is subjected to thermal runaway, the safety of the battery is effectively improved, and the life and property safety of personnel is protected.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicle power batteries, and more specifically relates to a power battery thermal management system capable of passively handling thermal runaway. Background technique [0002] With the continuous development of today's society and the continuous improvement of industrial levels, energy and environmental issues have become increasingly severe, so the promotion and popularization of pure electric vehicles is imminent. As the power source of pure electric vehicles, battery safety is the key to restricting the development of pure electric vehicles. [0003] At present, the power batteries of pure electric vehicles mainly use ternary lithium battery cells or lithium iron phosphate battery cells, both of which have serious risks of thermal runaway. Under the action of stress and heat stimulation, the cells in the battery module short-circuited, and the cells exploded, and a large amount of mixture ...

AI Technical Summary

Problems solved by technology

The main problems of this type of system are: 1. The electric / electromagnetic equipment in the system requires controllers and driving equipment, which will make the whole system more complicated and reduce reliability.

2. When the battery is thermally out of control, the high-temperature gas of several hundred degrees will damage the driving equipment or the controller and cause the system to fail

3. The storage tank of the fire extinguishing medium will also take up a lot of space

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