Firefighting system for lithium system power battery

Abstract

The invention discloses a firefighting system for a lithium system power battery. The firefighting system comprises a fire extinguishing pipe, a pressure sensor and a fire extinguishing medium. The pressure sensor is arranged at one end of the fire extinguishing pipe and is used for detecting pressure in the fire extinguishing pipe. The fire extinguishing medium is arranged in the fire extinguishing pipe. When the pipe body temperature of any position of the fire extinguishing pipe is higher than the first preset temperature, the corresponding position of the pipe body is molten to form a nozzle used for releasing the fire extinguishing medium. When the pressure sensor detects that the pressure in the fire extinguishing pipe is lower than the preset pressure, a firefighting system abnormalsignal is sent to a vehicle-mounted battery management system. The firefighting system for the lithium system power battery is lighter, more intelligent and more efficient.

Description

technical field [0001] The present invention relates to the technical field of fire extinguishing for lithium-based power batteries, and more specifically, to a fire-fighting system for lithium-based power batteries. Background technique [0002] In recent years, in the face of increasingly serious environmental problems such as global warming and ozone layer depletion, and the gradual depletion of non-renewable energy sources such as petroleum, human demand for new energy vehicles is increasing. [0003] Due to the advantages of high energy density, high output power, long service life, low self-discharge rate, wide operating temperature range, and no pollution, lithium-ion batteries are widely used in new energy vehicles. As one of the core components of new energy vehicles, battery packs, whose subunits are battery modules, are the power core of new energy vehicles. Although lithium-ion batteries have excellent performance, if they are abused, the accumulation of heat wi...

AI Technical Summary

Problems solved by technology

Most of the existing fire protection systems attribute the battery fire to the fire of electrical equipment, but the battery fire is actually a complex fire process coupled with Class A, Class B, Class C, Class D and Class E fires. The existing fixed gas There are great deficiencies and defects in the fully submerged fire extinguishing system. First, most of the existing fire extinguishing systems are fire extinguishing systems with storage tanks, which are large in size and weight, which seriously affects the energy density of the battery system. Second, The result is more complicated, the control method is cumbersome, and the installation position is not flexible; third: most of the fire-fighting systems on-board electric vehicles are portable fire extinguishing agents carbon dioxide and dry powder fire extinguishing agents, which makes the fire-fighting efficiency extremely low and damages the battery pack of electric vehicles. Big; Fourth: Since the battery pack is a sealed system, it is difficult for the fire extinguishing agent to penetrate into the battery pack to extinguish the fire, and it is impossible to achieve accurate point-to-point fire extinguishing. Therefore, it is difficult to effectively control the battery fire in the protection area, and the fire extinguishing effect is poor.

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