Lithium battery pack with protection function and household energy storage system thereof

Abstract

The invention relates to the technical field of new energy, and discloses a lithium battery pack with a protection function and a household energy storage system.The lithium battery pack comprises an outer shell, a fire extinguishing device comprises a first partition plate, a gas storage block, a main guide pipe, a branch pipe and a connecting assembly, and the first partition plate is fixedly connected to the interior of the outer shell; and a gas storage block is arranged on the side, away from the center of the outer shell, of the first partition plate, the gas storage block is filled with carbon dioxide gas, the upper side and the lower side of the gas storage block communicate with main guide pipes, and the main guide pipes are fixedly connected with evenly-distributed branch pipes. According to the lithium battery pack with the protection function, after the rubber cover is melted and burnt out by flames and high temperature, carbon dioxide gas flows into the branch pipes through the main guide pipe under the action of pressure and is sprayed out from the spherical shell, so that the aim of automatically and uniformly extinguishing fire in case of fire is fulfilled, and the effect of reducing the damage degree of equipment is achieved; therefore, the problems that fire cannot be extinguished in time, equipment is seriously damaged and the safety is not high are solved.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a protective lithium battery pack and a household energy storage system thereof. Background technique [0002] With the continuous development of science and technology, the pace of new energy development is accelerating. Lithium batteries are the top priority of new energy development. Nowadays, lithium battery packs are physically composed of battery packs, BMS, shell structural parts, and high-voltage modules. At the same time, it is composed of power indicator board, power connector, DC-DC power supply, fan, wiring harness and other auxiliary materials. [0003] The existing lithium battery packs mainly have the following technical defects: First, the traditional lithium battery packs are not equipped with fire extinguishing protection devices, which will lead to spontaneous combustion of lithium battery packs or flames caused by external factors, which need to be manually...

AI Technical Summary

Problems solved by technology

[0003] The existing lithium battery packs mainly have the following technical defects: First, the traditional lithium battery packs are not equipped with fire extinguishing protection devices, which will lead to spontaneous combustion of lithium battery packs or flames caused by external factors, which need to be manually extinguished by manual discovery, thereby Causes the problems of being unable to extinguish the fire in time, serious equipment damage and low safety; second, if the fire can be automatically detected and carbon dioxide gas is used for fire extinguishing operations, since the lithium battery pack is provided with ventilation holes for heat dissipation, but if the fire If the fire occurs, the fire will be fueled due to ventilation, which will cause the problem that the fire is difficult to extinguish

Images