Battery module temperature equalization and flow resistance self-adaptive liquid cooling system based on temperature and flow velocity monitoring

By introducing a collaborative monitoring and joint judgment mechanism for temperature and flow rate, the problems of uneven temperature and abnormal flow resistance in liquid cooling systems under complex operating conditions are solved, enabling adaptive liquid cooling control of battery modules and improving the temperature consistency and energy efficiency of the battery system.

CN121726599APending Publication Date: 2026-03-24NINGBO INST OF DALIAN UNIV OF TECH +2
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Patent Information

Application Number
CN202511948651.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-23
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

Existing liquid-cooled battery thermal management systems struggle to accurately reflect the spatial thermal distribution characteristics inside the battery under complex operating conditions, and cannot promptly identify changes in coolant flow, leading to uneven temperature and abnormal flow resistance, resulting in increased energy consumption and reduced system reliability.

Method used

A collaborative monitoring and joint judgment mechanism for temperature and flow rate is introduced. Temperature distribution and flow state information of the battery module are obtained through temperature monitoring unit and flow rate monitoring unit. Combined with flow channel adjustment component and central control unit, adaptive adjustment of pump speed and flow channel structure is realized to form a closed-loop control system.

Benefits of technology

It improves battery module temperature consistency and operational safety, reduces energy consumption, extends service life, and enhances system adaptability and reliability.

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Abstract

The invention belongs to the technical field of thermal management of immersed liquid-cooled batteries, and particularly relates to a battery module temperature equalization and flow resistance self-adaptive liquid cooling system based on temperature and flow velocity monitoring. Multi-point temperature information of a battery module is obtained through a temperature monitoring unit, and a temperature equalization index is calculated; the flow resistance change of the liquid cooling loop is judged by combining the flow speed monitoring unit with the running state of the circulating cooling pump, and the central control unit dynamically adjusts the rotating speed of the circulating cooling pump and / or controls the flow channel adjusting assembly to switch the cooling liquid flow channel based on the combination result of the temperature uniformity state and the flow resistance state. Therefore, the temperature consistency of the battery module and the self-adaptive control of the flow resistance of the liquid cooling system are realized under different operation conditions, the cooling of a key area can be enhanced when local hot spots exist, the flow path is optimized and the energy consumption is reduced when the flow resistance is increased or the load is relatively low, the thermal safety, the operation stability and the energy efficiency level of the battery system are improved, and the service life of the battery system is prolonged. The method is suitable for liquid cooling heat management scenes of high-energy-density batteries.
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