Fire fighting method of container type lithium ion battery energy storage system

Abstract

The invention discloses a fire fighting method of a container type lithium ion battery energy storage system. The fire fighting method of the container type lithium ion battery energy storage system utilizes an automatic fire extinguishing system and an early warning system, can separately initiate three-stage fire-extinguishing responses in different stages of fire happening and spreading in energy storage containers, such as single battery fire, battery module fire and energy storage system fire, and sends out three-stage warning signals, that is, through a fire detection and fire extinguishing system, a fine water mist fire extinguishing system and a water spray and water curtain system, the single battery fire as well as the spread of the fire between a battery cabinet and even the containers can be effectively restrained and prevented; and meanwhile, terminal monitor personnel takes different emergency measures through the different early warning signals, so that the safety and efficient operation of the container type energy storage system is ensured.

Description

technical field [0001] The invention belongs to the technical field of safety and relates to a fire-fighting system, in particular to a fire-fighting method capable of realizing a three-level fire-extinguishing response to a fire in a container-type lithium-ion battery energy storage system and having an early warning function. Background technique [0002] In recent years, with the development of smart grid construction, the demand for battery energy storage has been increasing. The battery energy storage system has the advantages of peak shaving and valley filling, emergency backup, and improvement of power quality. Lithium-ion batteries have gradually become the most widely used batteries in battery energy storage systems due to their many advantages such as high energy density, high output power, long charge and discharge life, wide operating temperature range, and small self-discharge. At the same time, with the increasing demand for battery energy storage applications...

AI Technical Summary

Problems solved by technology

[0003] At this stage, there are few fire protection strategies for containerized lithium-ion battery energy storage systems, and most installed containerized battery energy storage systems are equipped with a single gas fire extinguishing system

Existing fire-fighting strategies for containerized battery energy storage systems have great deficiencies and defects: (1) Most of the existing fire-fighting strategies are first-level or second-level responses, and most fire-fighting systems only target the characteristics of batteries that are easy to recombust. However, it does not take into account the spread of battery thermal runaway between modules and the spread of fire between energy storage cabinets

(2) In the existing fire fighting strategy, the fire extinguishing agent mostly uses CO 2 or a single gas fire extinguishing agent such as heptafluoropropane, while battery thermal runaway is a complicated process, and a single fire extinguishing agent has a low efficiency in suppressing battery fire

(3) Most of the existing fire protection strategies aim at extinguishing open flames, without considering the fact that the surface temperature of the battery is still high even though the open flames are extinguished

(4) Since the battery module is a relatively sealed system, the fire extinguishing method in the traditional fire extinguishing strategy cannot penetrate into the battery module, and cannot achieve accurate point-to-point fire extinguishing, so the fire extinguishing efficiency is low and the cooling effect is poor

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