Battery pack gas-supplying device of new energy vehicle

Abstract

The invention relates to a battery pack gas-supplying device of a new energy vehicle. The battery pack gas-supplying device comprises a storage device, a thin film, a block piece and a waterproof pad;the thin film is arranged on the outer side of the storage device, and the block piece is arranged on the outer side of the thin film; the waterproof pad is arranged outside the storage device, and afirst storage bin and a second storage bin are formed in the storage device; a pipeline is arranged between the first storage bin and the second storage bin to communicate the first storage bin withthe second storage bin; holes are formed in the side walls of the first storage bin and the second storage bin correspondingly; and a plug cover is arranged in the hole in the side wall of the secondstorage bin. Fire-extinguishing gas in a battery pack provided with the battery pack gas-supplying device can be made to keep in a high-concentration state; the pressure intensity difference of the interior and the exterior of the battery pack provided with the battery pack gas-supplying device can be decreased so as to reduce damage of the pressure intensity difference to a battery pack sealing structure; and the battery pack gas-supplying device of the new energy vehicle does not need to be controlled by electric devices in the working process and is automatically started under necessary environments.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a gas supply device for battery packs of new energy vehicles. Background technique [0002] Compared with traditional vehicles, new energy vehicles not only can get rid of dependence on oil, but also have the advantages of no polluting gas emission during work and protection of the urban environment. The battery pack is a key component of new energy vehicles, and its quality directly affects the service life and safety of new energy vehicles. At present, during the use of new energy vehicles, there have been fire and combustion accidents. One of the reasons for the accident is that the concentration of fire-extinguishing gas inside the battery pack is not high enough. The body or protective film ruptures, and the substance inside the battery overflows. The substance continues to react with the oxygen outside the battery at high temperature, expanding the ...

AI Technical Summary

Problems solved by technology

[0003] New energy vehicle battery packs can be filled with fire-extinguishing gases (such as carbon dioxide, nitrogen, or other gases that have the function of extinguishing fires on batteries) during the production process, but the battery packs will be affected by the external temperature or the power generated during the working process of the battery pack during use. Influenced by the heat, there is a pressure difference between the inside of the battery pack and the outside world. When the external pressure of the battery pack is greater than the internal pressure, the air will slowly enter the inside of the battery pack through the weak seal, thereby reducing the concentration of fire extinguishing gas inside the battery pack. fire extinguishing effect

Images