Protection gas-inflated parallel battery basic module suitable for new energy automobile

Abstract

The invention relates to a protection gas-inflated parallel battery basic module suitable for a new energy automobile. The protection gas-inflated parallel battery basic module comprises a parallel battery pack, a positive bus bar, a negative bus bar, a battery module shell, an electrical interface and a pressure release valve, wherein the positive bus bar is connected with the positive electrodeof the parallel battery pack and is used for collecting current; the negative bus bar is connected with the negative electrode of the parallel battery pack and is used for collecting current; the battery module shell surrounds the exterior of the parallel protection battery pack in a sealing mode, and the space between the battery module shell and the parallel protection battery pack is inflated with protection gas; the electrical interface is located in the battery module shell, and the interior of the electrical interface is connected with the positive bus bar and the negative bus bar separately, and the exterior of the electrical interface is connected with other electrical equipment; and the pressure release valve is positioned on the battery module shell. Compared with the prior art,the battery is isolated from air under the condition that the weight of the system structure is not increased, the damage of thermal runaway is reduced in a flame-retardant mode, the specific energy and safety of the new energy automobile battery system can be improved, it is beneficial to standardized production and the required battery pack can be expanded according to requirements.

Description

technical field [0001] The invention relates to a basic battery module, in particular to a basic battery basic module filled with protective gas and connected in parallel for new energy vehicles. Background technique [0002] Energy saving and emission reduction have become the trend of the world. New energy vehicles include pure electric vehicles, hybrid vehicles, fuel cell vehicles, etc. The current development trend of new energy vehicle power batteries is high energy density, which has very high requirements for the safety and reliability of vehicle battery packs. In recent years, the thermal spontaneous combustion, fire and explosion of electric vehicle power batteries have caused the thermal runaway of batteries to attract much attention. [0003] The thermal runaway of lithium-ion batteries mainly undergoes SEI film decomposition; negative electrode-electrolyte reaction; diaphragm melting process; positive electrode decomposition reaction; electrolyte solution decom...

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used methods for the prevention and control of thermal runaway of battery packs include increasing the distance between batteries and filling insulation materials between batteries to block the spread of heat and reduce the harm of thermal runaway, but these methods cannot prevent batteries from burning

In order to block the air, some people have proposed a method of immersing the battery in oil, but this method will greatly increase the structural weight of the battery pack, which is contrary to the trend of increasing the energy density of the battery system

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