A method and device for reducing the combustion hazard of a lithium battery charging and replacing cabinet

Abstract

The invention discloses a method and a device for reducing the combustion hazard of a lithium battery charging and exchanging cabinet. A shell cavity that can resist burning damage is selected, and a fire channel kit that can actively guide fireworks to be quickly discharged outward is selected; a controller, a The sensor that detects the cavity and the fire channel, activates the fire channel kit when the parameters are out of bounds, restricts the internal combustion to the pre-designed and safety-controlled pyrotechnic channel and the designated space, directional flow, outflow according to the specified outlet, and flow in according to the specified direction. Wind, and maintain effective operation within a specified period of time, realize the directional dredging of combustion in the cabinet and discharge to the outside, restrain the combustion temperature and intensity internally, limit and inhibit the combustion leakage, prevent the surrounding uncontrolled combustion and fireworks diffuse, Reduce burning hazards. The method of the invention is clear, simple and feasible, and the device of the invention has strong adaptability to application scenarios, easy structural design, rich material selection, convenient installation and maintenance, and improves the safety of the lithium battery charging and exchanging cabinet.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to the fire prevention of equipment containing lithium batteries, in particular to a method and a device for reducing the combustion hazard of a lithium battery charging and exchanging 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 power electronics. At present, power lithium batteries have become the application hotspot of emerging power energy, and are widely used in new energy transportation, such as electric cars, electric tricycles, and electric two-wheelers. Wheelbarrows are also widely used in industrial automation, such as handling robots, logistics robots, and operation robots that use lithium power, and they have also begun to be used in the communications industry and power industry. Negative electrode, electrolyte, diaphragm, shell, the organic electrolyte and d...

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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