Phase-change liquid-cooling coupled battery device

Abstract

The invention discloses a phase-change liquid-cooling coupled battery device, which comprises a liquid collecting channel liquid inlet plate, a liquid collecting channel liquid outlet plate, a plurality of parallel liquid cooling channel plates arranged between the liquid collecting channel liquid inlet plate and the liquid collecting channel liquid outlet plate, and a left side cover plate and aright side cover plate respectively arranged on the left side and the right side of the battery device, wherein the liquid collecting channel liquid inlet plate, the liquid collecting channel liquid outlet plate and the liquid cooling channel plate are each of a hollow structure and communicate with one another to form a liquid cooling channel allowing cooling liquid to flow. The performance of the power battery can be better improved, the surface temperature difference of the battery packs is reduced, and the temperature uniformity among the battery packs is improved.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a phase-change liquid-cooled coupled battery device. Background technique [0002] Compared with traditional fuel vehicles, pure electric vehicles have no emissions during driving, and have the advantages of simple structure, easy maintenance, and no noise. They are the future development direction of the modern automobile industry. Power lithium battery, as the direct power source of pure electric vehicles, is one of the key technologies of new energy vehicles. Its performance directly affects the safety, mileage and service life of the vehicle. There are many safety problems in the application of the power battery pack in the vehicle. An appropriate working temperature is the basic condition for the power battery to perform effectively. Therefore, optimizing the heat dissipation structure of the battery pack is of great significance for improving the safety and performance of...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the power battery packs for vehicles use a single cooling method to dissipate heat, but in actual operation, it performs poorly in controlling the maximum temperature and maximum temperature difference inside the battery pack.

For cylindrical batteries, the patent application number CN201720242489 (the patent name is "a new type of cylindrical battery pack liquid cooling device"), Tesla's liquid-cooled flat tube wrapping heat-conducting silicone pad heat conduction integration scheme for battery modules, etc., They all use liquid cooling channels alone to manage the lithium battery thermally. This type of design has the disadvantage that the large temperature difference between the battery packs affects the battery life.

However, the phase change cooling method alone has the disadvantage that the phase change material cannot be dissipated in time after it is completely liquefied, resulting in the inability to dissipate heat in time for the battery pack.

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