A thermal boundary layer control and heat conduction plate compensation battery pack liquid cooling device

By employing a liquid cooling device with thermal boundary layer control and thermal conductive plate compensation in a lithium-ion battery energy storage system, the problem of uneven temperature caused by uneven flow field distribution in immersion liquid cooling technology is solved, thereby improving the temperature uniformity and safety within the battery pack.

CN122118172APending Publication Date: 2026-05-29UNIV OF SHANGHAI FOR SCI & TECH
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Patent Information

Application Number
CN202511685675.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing lithium-ion battery energy storage systems, immersion liquid cooling technology suffers from uneven flow field distribution, resulting in uneven temperature distribution inside the battery and within the battery pack, which affects battery performance and safety.

Method used

The liquid cooling device, which employs thermal boundary layer control and thermal plate compensation, creates a stable vertical flow field and convective heat transfer by designing a lower and upper box, combined with a flow disruptor and a thermal plate. This thins the thermal boundary layer, reduces the internal temperature difference of the battery, and conducts heat through the thermal plate.

Benefits of technology

This improved temperature uniformity within the battery pack, enhanced battery performance and safety, reduced temperature differences and thermal consistency issues, and ensured stable system operation.

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Abstract

The application relates to the technical field of energy storage battery pack cooling devices, in particular to a thermal boundary layer control and heat conduction plate compensation battery pack liquid cooling device which comprises a lower box body. A bottom plate is arranged at the bottom of the lower box body. The cooling liquid in the lower liquid inlet pipe forms a stable laminar flow through the buffer channel, enters the bottom of the lower box body, and is not directly washed to the battery at the bottom due to the fact that the bottom support member lifts the battery body, but flows over the surface of the battery from bottom to top after being gathered in the cavity, and is then discharged through the upper liquid outlet pipe two of the upper box body. The spoiler is located in the gap between the batteries, can thin the thermal boundary layer, and reduce the heat exchange efficiency difference between the upper and lower ends of the battery. The heat conduction plate evaporation section contacts the battery for heat conduction, the condensation section extends into the cavity through the slot-shaped opening of the upper box body, the cooling liquid flowing through the cavity through the upper liquid inlet pipe of the upper box body exchanges heat with the condensation section, and finally the cooling liquid is discharged from the upper liquid outlet pipe one and two of the upper box body, completing the cooling cycle.
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