Special gas fire-extinguishing device for lithium-ion battery box and implementation method for fire extinguishing

Abstract

The invention relates to a special gas fire-extinguishing device for a lithium-ion battery box and an implementation method for fire extinguishing. The device comprises a gas fire-extinguishing agent container, a constant-pressure releasing mechanism, a gas inflowing locking device, a gas producing driver, a gas producing agent, a trigger and a fire detector. The gas producing driver is arranged in the fire-extinguishing agent container and connected with the trigger, the constant-pressure releasing mechanism is arranged at a fire-extinguishing agent releasing opening of the fire-extinguishing agent container, the gas producing agent explodes and is heated up under triggering of the trigger, so that the gas fire-extinguishing agent is changed to be gas from liquid and sprayed out from the constant-pressure releasing mechanism to extinguish fire, and the technical effects are that the size is small, and installation is convenient; and moreover, the internal pressure of the fire-extinguishing agent container is low under normal conditions, the safety and the reliability are achieved, effective fire extinguishing can be implemented on the lithium-ion battery box at first time, no residue is left after the fire-extinguishing agent is released, no corrosion damage is caused, and extension of thermal runaway of a battery is effectively restrained.

Description

technical field [0001] The invention relates to a fire extinguishing device, in particular to a special gas fire extinguishing device for a lithium-ion battery box and a method for realizing fire extinguishing. Background technique [0002] In recent years, under the catalysis of policies, my country's new energy automobile industry has developed rapidly, and the current power battery companies in the market are also developing rapidly. At this stage, the characteristics of lithium-ion batteries determine the spontaneous combustion and explosion of lithium batteries. In particular, some small battery manufacturers cannot guarantee the quality of batteries, which poses safety hazards to the batteries themselves, vehicles and personnel. In response to the current situation of lithium-ion battery fires, some companies have also developed fire extinguishing devices for extinguishing lithium-ion battery fires, and gradually applied them exploratoryly to lithium-ion battery boxes ...

AI Technical Summary

Problems solved by technology

According to the actual application of fire extinguishing devices on electric vehicles and the feedback from vehicle manufacturers and users, it is found that the existing fire extinguishing devices mainly have the following deficiencies and problems: First, aerosol and dry powder fire extinguishing agents are unclean fire extinguishing agents. There are residues, and some fire extinguishing agents will also cause certain corrosion damage to the lithium battery; second, after the hot aerosol fire extinguishing device and dry powder fire extinguishing device are activated, the released hot aerosol fire extinguishing agent and dry powder fire extinguishing agent cannot effectively reduce the temperature inside the battery box, and cannot Effectively inhibit the development of battery thermal runaway and fire

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