Automatic lithium battery fire extinguishing system

Abstract

The invention discloses an automatic lithium battery fire extinguishing system which is characterized by comprising a fire pre-warning system, a battery management system connected with the fire pre-warning system, a battery module connected with the battery management system and a fire extinguishing device connected with the fire pre-warning system, wherein the fire extinguishing device comprisesan extinguishing agent bottle group, an electromagnetic valve, an electromagnetic driving device, a distribution valve, a local release pipeline and a local nozzle at the final end, and the electromagnetic valve and the electromagnetic driving device are arranged on a connecting line between the fire pre-warning system and the extinguishing agent bottle group. The automatic lithium battery fire extinguishing system has the advantages that rapid full flood protection for a protection area is added, and the functions of fast fire extinguishing and overall protection are realized; multiple timesof starting to extinguish fire in a small range is achieved, a lithium battery fire is contained, and meanwhile the pollution of other battery modules caused by the traditional large-scale spraying of an extinguishing agent is avoided; mechanical emergency start is added, and the fire extinguishing system can be started through emergency operation when personnel find a fire; and BMS signal collecting and processing is added, so the fire pre-warning ability is improved, and the fire pre-warning response speed is increased.

Description

technical field [0001] The invention relates to the technical field of lithium battery fire extinguishing, and relates to an automatic lithium battery fire extinguishing system. Background technique [0002] In recent years, as lithium batteries have many advantages such as high energy density, high output power, and long charge and discharge life, they have been widely used in the fields of transportation power, electric energy storage, and mobile communications, and have developed into my country's energy strategic. part of the emerging industry. However, with the in-depth application of lithium batteries in engineering, the problem of fire safety has become increasingly prominent. Since lithium batteries are energetic substances, especially when they are overheated, short-circuited, squeezed, etc., they will generate a lot of heat, causing fire hazards. The chain reaction of internal electrode materials and electrolytes leads to thermal runaway and develops into large-sca...

AI Technical Summary

Problems solved by technology

After engineering application research and fire extinguishing test analysis, it is found that the existing device has the following obvious deficiencies: ① The cabinet type fire extinguishing device is basically arranged at the corner of the container door, and is aimed at the narrow and long lithium battery container energy storage occasions, such as 40 feet energy storage The container is 2.4 meters wide and 12 meters long, seriously exceeding the protection radius of the cabinet-type fire extinguishing device, and there is a protection dead angle, and the gas fire extinguishing agent sprayed by it is difficult to reach the pack box in time during fire extinguishing, which is not conducive to controlling the fire in the first place; ② The direct fire detection tube fire extinguishing device, after many experiments and tests, found that it can quickly reach the fire extinguishing concentration of the fire extinguishing agent in a small local area, and the fire extinguishing effect is good, but due to the influence of the layout of the release tube and the diameter of the tube, it cannot Good all-round protection for the entire energy storage cabinet, and the fire detection tube often needs a fire lasting 3 to 5 seconds before a breach occurs, and the response speed is slow, but the lithium battery fire spreads rapidly, which can easily cause a large-scale fire , thus detrimental to the overall fire protection

Images