Integral battery phase change cooling system and method based on gravity heat pipe principle

The integrated battery phase change cooling system, designed based on the principle of gravity heat pipe, solves the problems of gas-liquid distribution and cycle stability in the application of phase change cooling technology in multi-module parallel connection, and realizes uniform cooling between battery modules and efficient and stable operation of the system.

CN121885849BActive Publication Date: 2026-07-10SHUANGLIANG ECO ENERGY SYST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHUANGLIANG ECO ENERGY SYST CO LTD
Filing Date
2026-03-23
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing phase change cooling technology has problems in multi-module parallel applications, such as difficulty in distributing gas-liquid two-phase flow, difficulty in synchronously controlling the working fluid level after evaporation and condensation, and mutual interference between steam and return liquid leading to unstable circulation. These problems make it difficult to meet the temperature uniformity and safety requirements of large-scale energy storage systems.

Method used

The integrated battery phase change cooling system, designed using the principle of gravity heat pipe, achieves liquid level balance and gas pressure equalization of the phase change working fluid in each battery chamber through the combination of overflow pipe and gas manifold. It utilizes a gravity-driven natural circulation path to avoid external control components and ensure stable distribution and uniform cooling of the gas and liquid phases.

Benefits of technology

It achieves uniform cooling among battery modules, improves system stability and reliability, reduces energy consumption, and avoids the risks of response lag and control misalignment in traditional phase change cooling systems.

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Abstract

The application discloses a whole battery phase change cooling system and method based on the principle of gravity heat pipe, and relates to the technical field of electrochemical energy storage batteries. The battery phase change cooling system comprises an evaporation section main warehouse body, a balancing mechanism and a plurality of battery modules. A plurality of battery cavities are arranged in the evaporation section main warehouse body. The plurality of battery modules are uniformly distributed in the battery cavities. The evaporation section main warehouse body is provided with phase change working medium. The phase change working medium is in contact with the battery modules. The balancing mechanism is used for making the spaces of the battery cavities communicate with each other and the liquid levels of the phase change working medium in the battery cavities equal. The cooling system has high phase change working medium distribution balance and cycle stability.
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