Power battery device capable of inhibiting thermal runaway

Abstract

The invention discloses a power battery device capable of inhibiting thermal runaway. The device comprises a battery box body, a battery pack, a heat dissipation mechanism and a fire-extinguishing cooling mechanism; the battery pack comprises two battery bodies mounted in the battery box body; the heat dissipation mechanism comprises two air cooling openings formed in the battery box body, two heat dissipation fin plates arranged between the two battery bodies, and heat dissipation wind groups arranged on the air cooling openings; the fire-extinguishing cooling mechanism comprises a liquid storage tank, two liquid guide pipes and two spray heads, wherein the heat of the two battery bodies is conducted to fin battens of the two heat dissipation fin plates, and then the interior of the battery box body is subjected to heat dissipation through convective heat exchange; when the temperature of the battery pack continues to rise, the two copper sheets on the side faces of the two battery bodies are thermally expanded, the pressure is applied to the liquid guide pipe, the generated pressure enables liquid nitrogen to generate pressure intensity to burst through the one-way valve, the battery bodies are extinguished and cooled, and therefore thermal diffusion of the battery pack is restrained, and meanwhile accurate extinguishment and cooling during thermal runaway of the battery packare achieved.

Description

technical field [0001] The invention relates to power battery thermal diffusion technology, in particular to a power battery device capable of suppressing thermal runaway. Background technique [0002] In the automotive field today, electric vehicles have become a mainstream product in the market. However, in recent years, spontaneous combustion phenomena such as electric vehicle battery explosions have frequently occurred. The reasons for the thermal runaway of the power battery include that the charging device is not equipped with a saturation device, resulting in overcharging of the battery and causing thermal runaway. Second, short circuits in the internal materials of the battery or external circuits lead to thermal runaway. out of control etc. The consequences of thermal runaway are very serious, and the process is very fast, which will cause the battery pack to heat up, expand and deform, resulting in an explosion, which poses a great safety hazard. Contents of the...

AI Technical Summary

Problems solved by technology

However, in recent years, spontaneous combustion phenomena such as electric vehicle battery explosions have frequently occurred. The reasons for the thermal runaway of the power battery include that the charging device is not equipped with a saturation device, resulting in overcharging of the battery and causing thermal runaway. Second, short circuits in the internal materials of the battery or external circuits lead to thermal runaway. out of control etc.

The consequences of thermal runaway are very serious, and the process is very rapid, which will cause the battery pack to heat up, expand and deform, resulting in an explosion, which poses a great safety hazard

Images