A thermal management system flow test method

Abstract

This application discloses a flow rate testing method for a thermal management system, belonging to the field of automotive technology. It includes a refrigerant circuit, a battery water circuit, a heater water circuit, a degassing and replenishment water circuit, and an electric drive water circuit. The heater water circuit is equipped with a high-pressure heater and a three-way proportional water valve. The degassing and replenishment water circuit is equipped with a first reservoir and a manual on / off valve. The refrigerant circuit is equipped with a battery cooler and an electronic expansion valve. This application uses the entire vehicle as the test platform, utilizing existing system components to achieve temperature control and flow rate testing, reducing the investment in testing equipment and testing costs. It also avoids test deviations caused by inconsistencies between the bench piping layout and the vehicle's condition, improving test accuracy. Furthermore, it uses an ethylene glycol mixture consistent with actual operating conditions as the test medium, avoiding viscosity deviations caused by differences in the medium in traditional bench tests, and improving the accuracy of flow rate testing under low-temperature conditions.

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