Energy storage battery fire extinguishing system and control method thereof

Abstract

The invention discloses an energy storage battery fire extinguishing system and a control method thereof, the energy storage battery fire extinguishing system comprises a plurality of temperature sensors and a plurality of smoke sensors, and a group of temperature sensors and smoke sensors form two signal loops through input and output staggered distribution. The method for controlling the fire extinguishing system of the energy storage battery comprises the following steps: acquiring a current smoke amount to judge whether a thermal runaway state is entered or not; when it is judged that the probability of entering the thermal runaway state is higher than a preset value, the fire extinguishing system is triggered to conduct fire extinguishing and cooling so as to block thermal runaway; the occurrence stage of the preset value is before thermal runaway spreading. According to the method, intervention is performed in advance and fire extinguishing is triggered through an accurate judgment mechanism, so that quick release of fire extinguishing gas and accurate and effective intervention before entering a thermal runaway state are realized, battery cooling is realized, thermal runaway and thermal runaway spreading are blocked, and meanwhile, oxygen is isolated and open fire is blocked. The explosion risk caused by thermal runaway of the battery is reduced; and the technical advantage of accurate fire fighting is achieved.

Description

Technical field [0001] The invention involves the field of energy storage batteries, especially a energy storage battery fire system and its control method. Background technique [0002] Energy storage battery is currently an indispensable energy reserve medium for clothing, food, housing, and transportation. It is equipped with a fire protection system as a relief system. In order to ensure the reliable start and stop of the fire protection system, it is necessary to determine whether the fire alarm is triggered from the two dimensions of smoke and temperature. [0003] refer to figure 1 There are two signals in the existing fire system. Regardless of how much temperature sensor and smoke sensor are arranged, all the temperature sensors are connected in series to a signal loop, and all smoke sensors are connected to another signal loop. Only when the two signal loop trigger simultaneously, the fire system will be started to start the fire. The thermal discharge of lithium -ion b...

AI Technical Summary

Problems solved by technology

[0004] Once in the fourth stage, after the thermal runaway of the battery, there may be thermal runaway spread and explosion. At this time, the probability of fire extinguishing by the fire protection system is less than 10%. Risk level, environmental hazards, etc., there is the possibility of re-ignition and re-explosion

At the same time, the higher the degree of burn damage, the more difficult it is to investigate afterwards

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