Upper box body assembly, battery assembly and electric vehicle

Abstract

The invention discloses an upper box body assembly, a battery assembly and an electric vehicle, and belongs to the technical field of vehicles. The upper box body assembly comprises an upper box body, a metal covering film, a fire extinguishing material and an air pressure detection piece, wherein the upper box body is provided with a fixing flange, a plurality of reinforcing convex ribs and a plurality of part installation surfaces, the fixing flange is used for being connected with a lower box body so as to form a sealed installation space between the upper box body and the lower box body, the metal covering film is attached to the inner surface of the upper box body, the fire extinguishing material is filled in the reinforcing convex ribs, and the air pressure detection piece is used for detecting air pressure in the installation space. According to the invention, the structural strength of the upper box body is improved, small flames can be extinguished, and an alarm effect can be achieved when fire disasters, explosions and the like occur; the battery assembly can extinguish flames and buffer impact generated by battery thermal runaway explosion, and a driver or passengers can be reminded of potential safety hazards in time; and according to the electric vehicle, escape time can be reserved for passengers, and an alarm can be given to a driver or the passengers.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an upper box assembly, a battery assembly and an electric vehicle. Background technique [0002] With the increase in the number of electric vehicles, battery packs are increasingly prone to fire accidents caused by insulation reduction and short circuit caused by seal leakage, and the thermal runaway caused by the rapid development of the battery itself due to the trend of high energy density and high power performance There are more and more problems, and the safety of electric vehicles has become a hot spot of social concern. The battery pack contains electronic components such as battery modules, high-voltage electrical connection bars, and low-voltage wire harnesses. Once the battery pack is flooded, the battery pack will not work at least, and a burning accident will occur in severe cases. After the battery thermal runaway occurs, it will produce a violent reaction. This ...

AI Technical Summary

Problems solved by technology

The battery pack contains electronic components such as battery modules, high-voltage electrical connection bars, and low-voltage wire harnesses. Once the battery pack is flooded, the battery pack will not work at least, and a burning accident will occur in severe cases.

After the battery thermal runaway occurs, it will produce a violent reaction. This process is uncontrollable. It is necessary to leave enough time for passengers to escape in order to avoid casualties.

[0003] The current battery upper box assembly mostly adopts a large-surface integrated layout structure, and the height difference between the fixed surface and the highest surface is small, so it cannot guarantee more rib structure, and the structural strength is weak, and the current products cannot be delayed. When the thermal runaway of the battery occurs in a bad situation, once the thermal runaway of the battery occurs, there is no protection and delay measures at all, and it is very likely to be damaged by the explosion impact of the battery cell, which poses a great safety hazard

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