Fire-fighting control method for lithium battery module

Abstract

The invention discloses a fire-fighting control method for a lithium battery module. The fire-fighting control method comprises the following steps of when a fire-fighting control system detects smokein a lithium battery box, opening a fire extinguishing agent automatic control valve by an automatic control valve, using pulse control to throw a fire extinguishing agent into the battery box, and at the same time, throwing a refrigerant at the maximum speed by adjusting a coolant automatic control valve; and when the fire-fighting control system cannot detect the smoke in the lithium battery box, closing the fire extinguishing agent automatic control valve and the coolant automatic control valve by the automatic control valve, and stopping throwing the fire extinguishing agent and the refrigerant. According to the fire-fighting control method for the lithium battery module, accurate control is achieved, the fire extinguishing agent and the coolant are combined, the phase transformationmode is used to cool a lithium battery, open fire can be quickly put out without reigniting, so that the problems the lithium battery fire is difficult to put out quickly, the lithium battery reignites and the like are solved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a fire extinguishing control method for a lithium battery module. Background technique [0002] Lithium batteries have exothermic behavior during charging and discharging, which seriously affects the safety of lithium batteries, especially when charging and discharging at high rates, the heat release increases sharply, and there is a risk of fire and explosion. The existing fire extinguishing method is to use heptafluoropropane to carry out airtight fire extinguishing, and it is difficult to achieve the fire extinguishing function of lithium batteries due to the inability to achieve precise injection of fire extinguishing agents and rapid cooling. [0003] At present, the lithium battery fire extinguishing system uses a single fire extinguishing agent, which is difficult to suppress the re-ignition of the lithium battery. China Patent Application No. 201410217527.X discloses a l...

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Problems solved by technology

[0004] The applicant's research found that the temperature of the lithium battery rises rapidly during operation, especially when the lithium battery module is charged and discharged at 10C-20C, the temperature rises up to 10°C in one minute. If the temperature cannot be cooled quickly, there will be safety hazards such as explosion. However, the traditional single fire extinguishing agent is difficult to suppress the re-ignition of lithium batteries

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