Mixed-flow temperature-uniform cylindrical battery pack

Abstract

The invention discloses a mixed-flow temperature-uniform cylindrical battery pack. According to the mixed-flow temperature-uniform cylindrical battery pack, a plurality of rows of batteries are bondedwith heat conductive sheets through high heat conductive glue; heat exchanged between a plurality of rows of heat conductive sheets with liquid flow plates on the two sides is realized; each heat conductive sheet is provided with gas flow holes; a small size fan is arranged in the mixed-flow temperature-uniform cylindrical battery pack to promote gas circulating in a battery pack chamber, and enhance mixed flow heat transfer effect of gas flow communication; the gas flow holes of adjacent rows of heat conductive sheets are arranged to be staggered with each other; from the top to the bottom,gaps between the heat conductive sheets and a battery pedestal is designed to be wide and narrow alternatively, so that gas flow longitudinal and transverse multi-dimensional flow disturbance is enhanced further, and heat transfer on the air side of the heat conductive sheets is enhanced. Pneumatic series flow, and hole / gap staggered multi-dimensional gas flow disturbance is capable of realizing auxiliary enhancing of the heat transfer capacity of the air side of the heat conductive sheets and batteries, increasing temperature uniformizing effect of pneumatic series flow among rows, improvingthe battery pack internal temperature uniformity and consistency. The mixed-flow temperature-uniform cylindrical battery pack is suitable for cold and warm heat control process in battery pack heat management, and is promising in application prospect.

Description

technical field [0001] The invention belongs to the technical field of heat management of electric vehicle batteries, and in particular relates to a design method of a liquid flow circulation heat exchange structure for improving the temperature balance of a battery pack. Background technique [0002] Electric vehicles are fast charging, add Under high-rate discharge conditions such as high speed and climbing, the battery temperature will rise sharply, and the temperature difference of the battery pack will increase. Although the increase in the temperature difference of the battery pack will strengthen the natural convection of the air in the flow field, when the heat generated by the battery continues to accumulate, the performance of the battery will decrease significantly, and even cause the battery to age and fail. Therefore, it is urgent to design an efficient and reasonable battery pack heat exchange structure to improve the heat exchange capacity of the battery, ens...

AI Technical Summary

Problems solved by technology

With the use of phase change materials and heat pipes, the weight of the battery module is virtually increased, which is not conducive to the improvement of vehicle lightweight

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