Electric motor liquid cooling system

CN120074120BActive Publication Date: 2025-09-23GUANGDONG ZHENXI PRECISION COMPONENTS CO LTD
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Patent Information

Application Number
CN202510333855.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-20
Publication Date
2025-09-23
Estimated Expiration
2045-03-20

AI Technical Summary

Technical Problem

In existing liquid cooling systems, the circulation efficiency of the coolant is difficult to effectively match the heat generation of the motor, resulting in poor cooling effect and prominent energy consumption problems of the liquid pump.

Method used

A pumping mechanism driven by a trigger wheel is used to pump the coolant into the cooling hood. The rotor assembly drives the trigger wheel to rotate to drive the pumping mechanism. Combined with the backstop and pressurized chamber design, the coolant circulation efficiency is ensured to match the heat generation of the motor. The embedded groove design also reduces rotational energy consumption.

Benefits of technology

The matching of the coolant circulation efficiency and the heating level of the motor is achieved, which improves the cooling effect of the liquid cooling system, while reducing energy consumption and the stability and efficiency of the pumping mechanism.

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Abstract

The present invention relates to the technical field of electric motors for new energy vehicles, and in particular to a liquid cooling and heat dissipation system for an electric motor, the liquid cooling and heat dissipation system comprising: a motor, a liquid reservoir, a circulation device, a liquid pump, and a cooler. The motor comprises a housing, a stator assembly, and a rotor assembly. The circulation device comprises a trigger wheel mounted on the rotor assembly and driven to rotate by the rotor assembly, a liquid pumping mechanism mounted on the housing and triggered by the trigger wheel, and a cooling hood covered on the housing and connected to the liquid pumping mechanism. The rotor assembly drives the trigger wheel to rotate, thereby driving the liquid pumping mechanism to pump coolant provided by the cooler into the cooling hood. The liquid cooling and heat dissipation system for an electric motor of the present invention facilitates the rotor assembly to provide power to the trigger wheel, and the trigger wheel drives the liquid pumping mechanism to pump liquid, thereby ensuring that the pumping efficiency of the liquid pumping mechanism is proportional to the rotational speed of the rotor assembly, so that the circulation efficiency of the coolant matches the degree of heat generated by the motor, thereby achieving the purpose of improving the cooling effect of the liquid cooling and heat dissipation system on the motor.
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Citation Information

Patent Citations

  • Liquid-cooled double-shaft-extension permanent magnet synchronous servo motor

    CN217159438U

  • Electric motor with liquid cooled rotor

    US20200251963A1

  • Self-circulation liquid-cooled permanent magnet motor

    WO2016206342A1