Liquid circulation device, energy storage device and energy storage system

By designing a liquid circulation device and using the internal circulation mode to reflux the coolant, the problem of thermal runaway from the battery cabinet and high cost of cooling liquid is solved, and efficient thermal management and cost reduction are achieved.

CN119764647AActive Publication Date: 2025-04-04BYD CO LTD
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Patent Information

Application Number
CN202410875548.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-06-30
Publication Date
2025-04-04
Estimated Expiration
2044-06-30

AI Technical Summary

Technical Problem

When the equipment is short-circuited, aging or improperly used, the battery cabinet is likely to cause abnormal temperature rise, which will cause battery damage or even explosion thermal runaway, and the existing coolant flow mode is costly.

Method used

A liquid circulation device is designed, including a circulation assembly, through selectively connected first and second pipelines, the coolant is returned to the battery cabinet under preset conditions, realizing an internal circulation mode, and reducing dependence on external coolant.

Benefits of technology

The circulation efficiency of coolant is improved, the thermal runaway protection performance of the battery cabinet is enhanced, and the cost of use is reduced by recycling coolant.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a liquid circulation device, an energy storage device and an energy storage system, and the liquid circulation device comprises a circulation assembly which comprises a first pipeline which is connected between a battery cabinet and a main liquid inlet pipe and is selectively communicated with the battery cabinet and a main liquid outlet pipe, and a second pipeline which is connected between the battery cabinet and the main liquid outlet pipe and is selectively communicated with the battery cabinet and the main liquid outlet pipe, the first pipeline and the second pipeline are connected and selectively communicated, so that the cooling liquid flowing out of the battery cabinet flows back to the battery cabinet through the second pipeline and the first pipeline under a preset condition. Through the implementation mode, the circulating assembly is arranged between the battery cabinet and the main liquid inlet pipe and between the battery cabinet and the main liquid outlet pipe, and the battery cabinet can be selectively communicated with the main liquid inlet pipe and the main liquid outlet pipe to form a circulating loop for circulating cooling liquid, so that the circulating efficiency of the cooling liquid is improved, and the thermal runaway protection reliability of the battery cabinet is improved; and the cooling liquid is recycled to reduce the use cost of the cooling liquid.
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Citation Information

Patent Citations

  • Battery thermal management system and method

    CN114641887A

  • Battery thermal management system and method

    CN114641887B

  • Liquid cooling system and energy storage container

    CN114883690A

  • Immersed cooling energy storage system

    CN115360460A

  • Immersed power battery thermal management system

    CN115863844A