Method and device for reducing combustion hazards of lithium battery charging and changing cabinet

Abstract

The invention discloses a method and a device for reducing the combustion hazard of a lithium battery charging and changing cabinet. The method comprises the following steps of selecting a shell cavity capable of resisting combustion damage, and selecting a flame path suite capable of actively guiding smoke and fire to be quickly discharged outwards, arranging a controller and a sensor for detecting a cavity and a flame path, starting the flame path suite when parameters exceed the limit, limiting internal combustion in a smoke and fire channel which is designed in advance and provided with safety control and a specified space, conducting directional circulation, enabling air to flow out according to a specified outlet and enter in the specified direction, and keeping effective operation within a specified time period. Thus, oriented dredging and outward discharging of combustion in the cabinet are achieved, the combustion temperature and intensity are restrained inwards, combustion leakage is limited and restrained, peripheral uncontrolled combustion and smoke and fire diffusion are prevented from being caused, and combustion hazards are reduced. The method is clear, simple and feasible, the device is high in application scene adaptability, easy in structural design, rich in material selection and convenient to mount and maintain, and the safety of the lithium battery chargingand changing cabinet is improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to the fire protection of equipment containing lithium batteries, in particular to a method and device for reducing the combustion hazard of a lithium battery charging and changing cabinet. Background technique [0002] The power battery pack is the core component of new energy equipment and the key to the sustainable development of new energy sources for power electronics. At present, power lithium batteries have become a hot spot for emerging power energy applications, and are widely used in new energy transportation, such as electric cars, electric tricycles, and electric two-wheelers. Wheeled vehicles are also widely used in industrial automation, such as handling robots, logistics robots, and operating robots that use lithium electric power, and have also begun to be used in the communication industry and the power industry; currently, lithium batteries usually refer to lithium-...

AI Technical Summary

Problems solved by technology

[0005] The fire protection devices of lithium battery charging and swapping cabinets currently on the market are mainly aimed at the initial pyrotechnics of combustion, adopt sensor detection or over temperature detection, trigger fire control, implement fire prevention actions inside the device, pour flame retardants, release suffocating materials, or spray Cooling materials, such as gas hot melt adhesive, low thermal conductivity foam agent, dry powder, carbon dioxide, nitrogen, inert gas, water-based fire extinguishing materials, water; but because lithium batteries are internal high-energy flammable, physical deformation and electrical denaturation are sensitively related, electrical denaturation and Chemical reactions promote and deteriorate each other, and the interaction between electrochemical thermal change and combustion is out of control, forming a high-intensity and high-concentration deflagration high-risk fire source. Actually, the automatic equipment currently on the market is not very effective in fire prevention, fire prevention, fire control, and fire extinguishing. The function is not very stable, and the effect is not very certain. It often requires artificial external fire-fighting support to implement fire control. The most important thing is that these equipment may cause uncontrolled flame overflow if the fire cannot be fully suppressed. Spread to the surrounding environment, burn other combustibles, damage property, block safe passages or barrier escape passages in severe cases, or form serious and difficult to evade thick smoke and poisonous gas, harm personal safety, and directly threaten public safety

[0006] According to the above analysis, it can be seen that the existing fire prevention technical solutions for lithium battery charging and changing cabinets have certain limitations, and there are fundamental defects in limiting flame damage and controlling the spread of fireworks. When multiple lithium batteries in the charging and changing cabinet burn, Or burning for a long time, and the speed, concentration, and intensity are severe, high heat, thick smoke, and open flames in the charging and changing cabinet may leak or overflow outwards. , Deflagration, for more complex application scenarios and use environments, there is a risk of uncontrolled combustion, rapid expansion of chain hazards and secondary damage, which greatly reduces equipment safety and product availability

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