New energy anti-overheating lithium battery pack

Abstract

The invention relates to the field of lithium battery anti-overheating, in particular to a new energy anti-overheating lithium battery pack. The battery pack comprises a protection box, a closing plate is installed on the upper side of the protection box, a lithium battery pack body is installed in the protection box, cooling pipes are evenly arranged on the left side and the right side of the lithium battery pack body, and a refrigeration block is fixedly installed at the bottom of the protection box. The cooling pipe is fixedly mounted on the refrigeration block, and a crushing wall is arranged on the cooling pipe; moving cavities are formed in the protection box outside the lithium battery pack, first moving rods are movably mounted in the moving cavities on the left and right sides of the cooling pipe, first springs are fixedly connected to the front and rear sides of the moving cavities, and the other ends of the first springs are fixedly connected with moving blocks; a pushing rod is movably installed at the upper end of the side, away from the lithium battery pack, of the moving block, the upper end of the pushing rod is rotationally connected with a first rotating rod, cooling and fire extinguishing are conducted on the lithium battery pack through a cooling agent in the cooling pipe, an oxygen-poor sealing environment is provided for the protection box, high-pressure gas in the protection box is released, and secondary explosion is avoided.

Description

technical field [0001] The invention relates to the field of preventing overheating of lithium batteries, in particular to a new energy lithium battery pack for preventing overheating. Background technique [0002] At present, we often see some safety accidents caused by lithium batteries. The most impressive thing is the explosion and fire caused by lithium batteries. The direct cause of lithium battery fire and spontaneous combustion is the thermal runaway of the battery. The so-called thermal runaway refers to The internal short circuit of the battery is caused by various stimuli, causing the internal temperature of the battery to rise by thousands of degrees. It will cause the surface of the lithium battery to bulge and expand, which will increase the volume of the lithium battery and cause an explosion and fire. If the lithium battery is cooled during a period of rapid temperature rise before the lithium battery explodes, the lithium battery will If the temperature poi...

AI Technical Summary

Problems solved by technology

[0002] At present, we often see some safety accidents caused by lithium batteries. The most impressive thing is the explosion and fire caused by lithium batteries. The direct cause of lithium battery fire and spontaneous combustion is the thermal runaway of the battery. The so-called thermal runaway refers to The internal short circuit of the battery caused by various stimuli causes the internal temperature of the battery to rise by thousands of degrees. It will cause the surface of the lithium battery to bulge and expand, which will increase the volume of the lithium battery and cause an explosion and fire. If the lithium battery is cooled during a period of rapid temperature rise before the lithium battery explodes, the lithium battery will If the temperature point of explosion and fire cannot be reached, the lithium battery will be effectively protected against explosion and fire. Secondly, the internal temperature of the battery will rise by thousands of degrees, and the flammable electrolyte will boil and spray out, and will burn after contacting air. Therefore, during the explosion and combustion process of the battery pack, creating a sealed environment, reducing the contact between the electrolyte and air, and providing an oxygen-deficient environment when the electrolyte burns will effectively reduce the fire of the lithium battery. Therefore, in summary , it is necessary to design related equipment

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