Fire extinguishing system using power battery liquid cooling device

Abstract

The invention discloses a fire extinguishing system using a power battery liquid cooling device. The fire extinguishing system comprises a battery cell module, a temperature sensor, a gas sensor, a smoke detector, a flame detector, a water cooling pipeline, a cooling liquid nozzle, a cooling liquid injection valve, a fire extinguishing agent storage tank, a fire extinguishing management system, analarm display screen, a connecting wire harness and a battery management system, wherein the temperature sensor is arranged in the battery cell module; the flame detector which is in electric signalconnection with the fire extinguishing management system through the connecting wire harness is arranged on the outer side of the battery cell module; the gas sensor, the smoke detector and the fire extinguishing agent storage tank communicate with the fire extinguishing management system through the connecting wire harness; and the water cooling pipeline is further arranged on the outer side of the battery cell module. Through the application of a proper control strategy, when a battery is subjected to thermal runaway or combustion, cooling liquid in a liquid cooling system is controlled to be injected in a directional mode, the advantage that the specific heat capacity of the liquid is large is utilized, the temperature of a battery cell is rapidly reduced, and the thermal runaway or flame spreading speed is delayed to provide enough escape time for passengers.

Description

technical field [0001] The invention relates to the technical field of battery fire extinguishing, in particular to a fire extinguishing system using a power battery liquid cooling device. Background technique [0002] With the improvement of people's living standards and people's requirements for environmental protection, and the gradual improvement of new energy technologies, new energy vehicles are becoming more and more accepted by the public. Among them, the development prospects of new energy electric vehicles using lithium-ion power batteries as energy sources It is the most optimistic for everyone, and it is also in line with the country's strategic plan for the automobile industry. However, power batteries are high-energy carriers. With the application of large quantities, the corresponding safety problems are particularly prominent, especially the combustion and explosion accidents of batteries are also showing a high incidence. The reason is mostly related to the...

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Problems solved by technology

Because a large amount of oxidant will be released during the combustion process of the ba

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