Battery pack cooling system

Abstract

The invention relates to a battery pack cooling system. The battery pack cooling system comprises a battery module, a snakelike liquid cooling pipeline and a phase change material, the battery module comprises a plurality of single batteries and a nickel strap; the snakelike liquid cooling pipeline comprises a cooling medium, a snakelike flow channel, a water inlet and a water outlet, wherein the water inlet and the water outlet are formed in the two ends of the snakelike flow channel respectively. A plurality of honeycomb structures with notches are arranged in the phase change material; each honeycomb structure is provided with one single battery; the snakelike flow channel is embedded in the phase change material through the notch, and the snakelike flow channel is uniformly wound on the periphery of each single battery. According to the invention, the paraffin-graphite composite phase change material is coupled and applied to a power battery thermal management system. The structure not only can fully utilize the high latent heat of the phase change material to absorb heat, but also can timely dissipate the gathered heat through a medium circularly flowing in the snake-shaped flow channel. And when the battery pack works at a low temperature, the system can also play a good heat preservation role.

Description

technical field [0001] The invention relates to the technical field of power battery thermal management, in particular to a battery pack cooling system. Background technique [0002] With the increasing global attention to energy and environmental development, green and clean renewable energy has been vigorously developed. Among them, new energy vehicles represented by electric vehicles have become an emerging industry for countries to achieve energy conservation and emission reduction. Lithium-ion batteries have become an important pillar in the field of new energy vehicles with the advantages of high energy density, high cycle times and low self-discharge rate, and will also enter the market at a high speed. [0003] As lithium-ion batteries continue to flood the market, the safety issues it brings cannot be ignored. Limited by the material characteristics of lithium-ion batteries, the working temperature of 20℃~40℃ and the temperature difference of single cell below 5℃ ...

AI Technical Summary

Problems solved by technology

[0004] Compared with traditional cooling methods, phase change materials have unique advantages. During the phase change process, a large amount of latent heat can be absorbed and released, but the heat conduction rate is slow, which cannot meet the requirements of the current battery pack cooling system.

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