Cylindrical battery pack

Abstract

The invention discloses a cylindrical battery pack which comprises heat radiation fins, an aluminum-based plate, heat tubes, cylindrical batteries and heat radiation brackets, wherein the cylindrical batteries are wrapped by insulating membranes; two ends of the cylindrical batteries are respectively positive lugs and negative lugs; a plurality of grooves for holding the cylindrical batteries are uniformly formed at intervals in the outer surfaces of the heat radiation brackets in a concave manner; through holes are formed in the middle of the heat radiation brackets; the extension directions of the through holes are accordant with those of the cylindrical batteries; the heat tubes comprise connecting parts and tail end parts; the tail end parts are mounted in the through holes; the connecting parts are mounted on the surface of one side of the aluminum-based plate; the heat radiation fins are assembled on the surface of the other side of the aluminum-based plate in an adhesion manner. The cylindrical battery pack disclosed by the invention has good heat conduction and radiation channels.

Description

Technical field: [0001] The invention relates to a cylindrical battery pack, which belongs to the field of batteries. Background technique: [0002] Most of the existing cylindrical battery packs are used after multiple batteries are connected in series and parallel. In electric vehicles and energy storage systems, high-voltage and high-capacity battery packs are required. Coupled with the series-parallel relationship between the positive and negative electrodes, the gap between the batteries is very small. Air cooling, natural cooling, etc. are generally used for battery heat dissipation. Due to the complex internal chemical reactions of the battery during charging and discharging, accompanied by heat generation, especially for devices composed of multiple battery cells, such a small The denser arrangement of the gaps is easy to form heat accumulation in the middle, and the temperature accumulation is faster, so that a large amount of heat accumulation is rapidly generated...

AI Technical Summary

Problems solved by technology

Air cooling, natural cooling, etc. are generally used in battery heat dissipation. Due to the complex internal chemical reactions of batteries during charging and discharging, accompanied by heat generation, especially for devices composed of multiple battery cells, such a small The denser arrangement of the gaps is easy to form heat accumulation in the middle, and the temperature accumulation is faster, causing a large amount of heat accumulation inside the battery, which must cause the battery temperature to rise and the temperature distribution to be unbalanced, resulting in battery performance degradation, which may cause Leakage, outgassing, smoke, etc. occur, and in severe cases, the battery may burn violently or even explode

[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, and the heat of the battery itself cannot be effectively taken away after the fan is installed. When the temperature of the battery is different during use, it will cause inconsistencies in the whole box of batteries, thus affecting the service life of the entire battery pack. , and leave a security risk

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