Electric automobile battery pack heat management structure

Abstract

The invention discloses an electric automobile battery pack heat management structure which comprises connecting brackets, heat dissipation brackets, cylindrical batteries, heat pipes, an aluminum substrate and heat dissipation fins; the outer layers of the cylindrical batteries are coated by insulating films, a positive lug and a negative lug are arranged at two tail ends of each cylindrical battery respectively, the outer surfaces of the heat dissipation brackets evenly sink to form a plurality of grooves at intervals, through holes are formed in the middle positions of the heat dissipation brackets, the extending directions of the through holes are consistent with the extending directions of the cylindrical batteries, the connecting brackets are mounted at two tail ends of the cylindrical batteries respectively and comprises accommodating parts for accommodating the positive lugs and the negative lugs therein, sunken parts and bulge parts are arranged at intervals, the heat pipes comprise connecting parts and tail end parts, the tail end parts are mounted in the through holes, the connecting parts are mounted on one side surface of the aluminum substrate, and the assembled heat dissipation fins are adhered to the other side surface of the aluminum substrate. The electric automobile battery pack heat management structure provided by the invention can effectively ensure the temperature uniformity of the battery pack.

Description

Technical field: [0001] The invention relates to a thermal management structure of an electric vehicle battery pack, which belongs to the technical field of electric vehicles. Background technique: [0002] Electric vehicles have better advantages than traditional vehicles in terms of energy saving and emission reduction, and have become the development direction of future automobiles. The power battery as the power source of electric vehicles is a key factor restricting the development of automobiles. Recently, power battery packs have also become the mainstream power source for electric vehicles. In battery vehicles, multiple battery cells are usually connected in series or in parallel in different forms to form a battery device to provide the required voltage and capacity. Due to the complex internal chemical reactions of the battery during the charging and discharging process, accompanied by heat generation, especially for devices composed of multiple battery cells, suc...

AI Technical Summary

Problems solved by technology

Due to the complex internal chemical reactions of the battery during the charging and discharging process, accompanied by heat generation, especially for devices composed of multiple battery cells, such smaller gaps and denser arrangements are easy to form heat accumulation in the middle, and the temperature Accumulation is faster, causing a large amount of heat to accumulate rapidly inside the battery, which will inevitably cause the temperature of the battery to rise and the temperature distribution to be unbalanced, resulting in a decline in battery performance, and phenomena such as liquid leakage, outgassing, and smoke may occur. There is a danger of violent combustion or even explosion of the battery

[0003] Not only that, after the batteries are connected in series and parallel, due to the limitation of the assembly of the module module itself, the connection method of the cylindrical battery also occupies most of the area of ​​the battery itself, which means that there are very few battery gaps reserved by itself. Or the intermediate battery cannot get an effective heat dissipation environment. At present, the simplest air-cooling or air-cooling methods are commonly used in the market. After installing a fan, the heat of the battery itself cannot be effectively taken away. When the temperature of the battery is different during use, it will Cause inconsistency in the whole box of batteries, thus affecting the service life of the whole battery pack and leaving potential safety hazards

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