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Two-phase immersed battery liquid cooling system with multiple modules sharing one constant-pressure device

A constant voltage device, immersion technology, applied in the direction of batteries, secondary batteries, battery pack components, etc., can solve problems such as shortening the service life, and achieve the effect of improving stability, temperature and pressure stability

Pending Publication Date: 2020-11-03
DALIAN UNIV OF TECH
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  • Description
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AI Technical Summary

Problems solved by technology

Due to the pulse pressure inside the battery box during the working process, the service life of the battery box will be shortened due to the long-term pulse stress load

Method used

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  • Two-phase immersed battery liquid cooling system with multiple modules sharing one constant-pressure device

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0021] The invention discloses a two-phase submerged battery liquid cooling system in which multiple modules share a constant pressure device. The two-phase submerged battery liquid cooling system connected with each other and equipped with a pressure buffer device includes: a battery pack module, a constant voltage modules and cooling modules;

[0022] Among them, the battery pack module includes: battery 1, box body 2, fluorinated l...

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Abstract

The invention belongs to the technical field of power batteries, and provides a two-phase immersed battery liquid cooling system with multiple modules sharing one constant voltage device. The heat generated by the battery in the working process is dissipated by vaporization of the fluorinated liquid on the surface of the battery, the vaporized fluorinated liquid is condensed on the surface of theupper cover plate of the box body and in the air storage chamber, and the heat released by condensation is absorbed by a cooling working medium in the cooling coil, so that the highest temperature ofthe battery and the temperature difference between different battery monomers are effectively controlled. Compared with a traditional two-phase immersed battery liquid cooling device, the liquid cooling device has the following advantages that the pulse pressure in the box body is buffered by utilizing the position movement of the piston in the air storage chamber, so that the box body does not need to bear the pulse pressure load, and the stability of the system is improved; in addition, the condensation rate of the fluorinated liquid steam changes along with the change of the heat productionrate of the battery, so that the temperature and the pressure in the battery box body can be controlled to be basically stable.

Description

technical field [0001] The invention belongs to the technical field of power batteries, in particular to a two-phase submerged battery liquid cooling system in which multiple modules share a constant voltage device Background technique [0002] New energy vehicles have great advantages in environmental protection and energy utilization. As the heart of new energy vehicles, power batteries have attracted the attention of many companies. Lithium batteries are widely used in electric vehicles due to their high energy density and long cycle life. Temperature is the main factor affecting the storage and safety of lithium batteries. Working at too high a temperature will lead to rapid degradation of battery performance and even thermal runaway. Therefore, designing an efficient battery thermal management system is a necessary condition to improve the overall performance of electric vehicles. [0003] At present, the battery thermal management methods mainly include: air-cooled, ...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/625H01M10/6556H01M10/6567H01M10/6569H01M2/10B60L58/26
CPCH01M10/613H01M10/625H01M10/6556H01M10/6567H01M10/6569B60L58/26H01M2220/20Y02E60/10Y02T10/70
Inventor 李羽白李洋
Owner DALIAN UNIV OF TECH
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