Safety protection device of lithium battery energy storage system

Abstract

The invention discloses a safety protection device of a lithium battery energy storage system, the battery energy storage system comprises a plurality of battery modules, the device comprises: a cabinet body, wherein the cabinet body comprises a plurality of mutually independent cavities, and the battery modules are distributed in the plurality of cavities; a plurality of smoke detectors which arearranged in the plurality of cavities and are used for detecting whether smoke occurs in the cavities for accommodating the smoke detectors or not; a plurality of smoke detectors which are connectedto the control device in parallel; and a fire extinguishing device which is used for accommodating a fire extinguishing agent and is arranged in the plurality of cavities, wherein when the temperaturein the cavities exceeds the temperature threshold value of the fire extinguishing device in the cavities, the fire extinguishing device releases the fire extinguishing agent. According to the safetyprotection device of the battery energy storage system, the fire signal is detected in the small space of the battery PACK layer, the fire extinguishing agent is automatically released, the efficientfire extinguishing effect can be achieved, and the safety performance of the lithium battery energy storage system is improved.

Description

technical field [0001] The invention relates to the field of lithium battery energy storage, in particular to a safety protection device for a lithium battery energy storage system. Background technique [0002] At present, more and more lithium battery energy storage systems have been used. Due to the material characteristics of lithium batteries themselves, the possibility of fire and combustion cannot be completely eliminated. Many cases of lithium battery energy storage system fire accidents at home and abroad have made people attach great importance to the safety of the lithium battery energy storage industry, and even restricted the development of the entire lithium battery energy storage industry. [0003] Existing fire-fighting solutions for the lithium battery energy storage industry mostly use heptafluoropropane as a fire extinguishing agent, and mostly use cabinet-type heptafluoropropane fire-extinguishing devices, hanging-type heptafluoropropane fire-extinguishin...

AI Technical Summary

Problems solved by technology

The above schemes are all submerged gas fire extinguishing for the space where the energy storage system is located, and there are the following problems: due to the poor airtightness of the space, the fire extinguishing environment cannot be extinguished without reaching the fire extinguishing concentration; because the fire detection device cannot detect the fault at the first time, resulting in a fire The spread caused a bigger accident; due to the airtightness of the energy storage product cabinet and other factors, the fire extinguishing agent could not effectively fill the fire area, which seriously affected the fire fighting effect of lithium batteries

Images