Power battery pack anti-reburning automatic fire extinguishing device and method

Abstract

The invention discloses a power battery pack anti-reburning automatic fire extinguishing device and method. The power battery pack anti-reburning automatic fire extinguishing device is characterized in that an outer shell of the fire extinguishing device is divided into an inner shell body and an outer shell body, wherein a fire extinguishing module is arranged in a gap at the top of the part between the inner shell body and the outer shell body, the fire extinguishing module comprises a flame sensor and a fire extinguisher spray head, and the outer end of the fire extinguishing module is connected with the two high-pressure fire extinguishing agent tanks which are correspondingly provided with a compression cooling fire extinguishing agent and a flame retardant extinguishing agent. When the flame sensor of the fire extinguishing module detects a flame signal in the area, the flame signal is transmitted to a controller, the controller issues an instruction to sequentially open a valveof the flame-retardant fire extinguisher tank and a valve of the cooling fire extinguisher tank at intervals, and the fire extinguisher spray head in the fire extinguishing module of the fire area isstarted at the same time, so that the purposes of early rapid fire extinguishing and continuous cooling and extinguishing are achieved, and further diffusion of a fire accident of a battery pack is effectively controlled; and the shell and the battery pack are independent, so that the shell is not limited by the type of batteries, and the application range is wide.

Description

technical field [0001] The invention relates to a fire extinguishing device, in particular to an automatic fire extinguishing device and method for preventing re-ignition of a power battery pack. Background technique [0002] In recent years, the popularity of electric vehicles has become more and more widespread, and the capacity of on-board lithium-ion batteries has also increased. However, due to the instability of lithium-ion batteries themselves, the consistency of single batteries and the bottleneck of battery pack BMS technology, Leading to frequent spontaneous combustion accidents of electric vehicles. [0003] Relevant actual electric vehicle fire rescue examples and lithium-ion battery fire experiments show that if there is no cooling measure for a certain period of time after the fire extinguishing agent extinguishes the battery fire, the battery fire is likely to re-ignite. [0004] The vast majority of electric vehicle battery pack thermal runaway fire accident...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the popularity of electric vehicles has become more and more widespread, and the capacity of on-board lithium-ion batteries has also increased. However, due to the instability of lithium-ion batteries themselves, the consistency of single batteries and the bottleneck of battery pack BMS technology, Leading to frequent spontaneous combustion accidents of electric vehicles

[0003] Relevant actual electric vehicle fire rescue examples and lithium-ion battery fire experiments show that if there is no cooling measure for a certain period of time after the fire extinguishing agent extinguishes the battery fire, the battery fire is likely to re-ignite

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