A kind of fire extinguishing method of lithium battery box

Abstract

The invention provides an early warning and automatic control method for thermal runaway of lithium batteries. The method is characterized in that once the batteries in a battery box cause a fire due to development of thermal runaway development, an extinguishing device is automatically started immediately to release an extinguishing agent for extinguishing, and the extinguishing agent is released several times. According to the method, the defect that in an existing traditional extinguishing mode, multiple fires which are caused by fire resurgence and thermal runaway extension in lithium battery box fire controlling cannot be controlled is overcome, extinguishing can be conducted multiple times by releasing the extinguishing agent multiple times in the method, continuous cooling can be conducted, fire resurgence is effectively inhibited, thermal runaway extension is prevented, property losses are reduced, and malignant fire accidents are avoided to the greatest extent.

Description

technical field [0001] The invention relates to the technical fields of lithium batteries, lithium battery energy storage and electric vehicles, in particular to a fire extinguishing method for a battery box. Background technique [0002] The lithium battery described in the present invention refers to the general designation of lithium metal battery and lithium ion battery, especially the lithium alloy metal oxide widely used at present is a high-performance lithium ion battery with positive electrode material, including ternary materials, lithium iron phosphate and other lithium ion batteries. Battery. Lithium battery cells have limited energy. In actual use, they are often connected in series and parallel to form a battery pack, which is packaged in a battery box and used as a power battery as a whole. [0003] With the rapid development of lithium battery energy storage, especially the practical application of lithium battery in electric vehicle power, along with more a...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the current traditional fire extinguishing methods in the fire control of lithium battery boxes, aiming at the uncontrollable deficiencies of multiple fire occurrences caused by fire resurgence and thermal runaway expansion, and to provide a multiple release fire extinguishing agent for multiple times. The fire extinguishing method can effectively suppress the re-ignition of the fire, prevent the fire caused by the thermal runaway expansion, greatly reduce the risk of the thermal runaway chain reaction of the lithium battery caused by the thermal runaway, protect the life and property safety of the vehicle drivers and passengers, and try to avoid Occurrence of a nasty accident

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