Liquid-cooled battery pack ventilation auxiliary heat dissipation device and control method

Abstract

The invention discloses a liquid-cooled battery pack ventilation auxiliary heat dissipation device and method. The device comprises a battery pack assembly and a chassis, an air duct assembly is arranged between the battery pack assembly and the chassis and comprises an air guide cover and an air duct body, and the air guide cover is located at the front end of the air duct body of a flat hollow structure. The battery pack assembly is in close contact with the upper surface of the air duct body, the air duct body is fixed above the chassis, and the auxiliary heat dissipation device is controlled through the steps of monitoring the internal temperature of the battery pack assembly, judging the temperature, starting the auxiliary heat dissipation device and the like. The beneficial effects of the present invention are that liquid cooling and air cooling are combined, so that the temperature difference between the battery modules can be reasonably and effectively reduced, and the problemof temperature accumulation of the battery pack is effectively solved; the air cooling heat dissipation is carried out by utilizing the sufficient air flow when an automobile runs; the temperature ofthe battery pack can be rapidly reduced by matching with a heat conduction block with fins made of a high-heat-conduction silicon material, and the rapidity of the heat dissipation process and the balance of temperature reduction are realized.

Description

technical field [0001] The invention relates to a heat dissipation device and a control method for a battery pack, in particular to a ventilation auxiliary heat dissipation device and a method for a liquid-cooled battery pack, belonging to the technical field of new energy vehicles. Background technique [0002] In recent years, the development of the automobile industry and the widespread use of automobiles have exacerbated the problem of environmental pollution. As an important alternative to traditional vehicles, electric vehicles and hybrid vehicles are expected to reduce vehicle exhaust pollution, so they are developing rapidly. As the core component of electric vehicles, the power battery pack determines the performance of electric vehicles. During the working process, the power battery pack generates a lot of heat. If the heat cannot be effectively removed, it will increase the temperature and temperature difference of the battery pack, affect the performance of the...

AI Technical Summary

Problems solved by technology

[0003] In order to make the battery pack more efficient and more uniform heat dissipation, many technical scholars have proposed many solutions. At present, there are mainly two forms of air cooling and liquid cooling in the market. However, air cooling generally has low battery temperature on the air inlet side and low battery temperature at the air outlet. The disadvantage of high battery temperature on the side is that it cannot cool down the battery evenly; although the cooling effect of the liquid cooling mode is better than that of air cooling, if the battery pack is discharged at a high power, the heat generated by the battery pack in an instant is difficult to guarantee to dissipate quickly

[0004] Fully considering the rationality, consistency and safety of the space, more and more electric vehicles are now designing the battery pack as a chassis, but there are some problems. First, the battery is too close to the ground, which may cause sharp damage to the bottom of the battery. Objects will be damaged by impact; secondly, the vehicle's wading ability will also be affected. Although the battery pack is designed to be waterproof, it is still not fully waterproof.

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