Filling device and method for new energy automobile power system cooling liquid

Abstract

The invention provides a filling device and method for new energy automobile power system cooling liquid. During application, a first valve and a second valve are opened at first, and a third valve isclosed; air in a first pipeline, air in a second pipeline and air in a liquid storage device are exhausted through a vacuum pumping device, and the first valve and the second valve are closed when liquid in the liquid storage device is sucked out; afterwards, the second valve and the third valve are opened, the first valve is closed, and the second pipeline, a third pipeline and a cooling systemconnected with a filling joint are subjected to vacuum pumping through the vacuum pumping device; and at last, the first valve and the third valve are opened, the second valve is closed and cooling liquid in the liquid storage device is sucked into the cooling system due to negative pressure. By the adoption of the filling device and method, after the air in the first pipeline, the air in the second pipeline and the air in the third pipeline are exhausted, the cooling system is subjected to vacuum pumping, the phenomenon that air exists in a cooling loop in the filling process can be avoided and insufficient filling of the cooling liquid is prevented.

Description

technical field [0001] The invention relates to the technical field of coolant filling, in particular to a new energy vehicle power system coolant filling device and method. Background technique [0002] The power system components of new energy vehicles are complex, generally including: engine, drive motor, drive motor controller, DC / DC, power battery, etc. Since each power component has different temperature requirements, multiple cooling circuits must be designed to meet the temperature requirements of each component, and because the pipeline direction of each cooling circuit is complicated, and a water valve is designed in the circuit to control the flow direction of the coolant, This puts higher demands on the coolant filling. [0003] Typically when a vehicle is being refilled with coolant, it is often the case that the coolant is underfilled, or the presence of air in the cooling circuit affects the cooling performance. [0004] Therefore, how to provide a filling d...

AI Technical Summary

Problems solved by technology

[0003] Usually when the vehicle is filled with coolant, there is often insufficient coolant fill, or the presence of air in the cooling circuit affects the cooling performance

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