Control method and driving system of electric control three-way valve in fuel cell thermal management system
A thermal management system, fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as inaccurate temperature control, and achieve the effect of ensuring control accuracy, saving manpower and time costs
Pending Publication Date: 2022-06-28
BEIJING SINOHYTEC
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The invention provides a control method and a driving system of an electric control three-way valve in a fuel cell thermal management system, belongs to the technical field of fuel cells, and solves the problem that the temperature control of the electric three-way valve is inaccurate along with the accumulation of switching times in the prior art. The method comprises the following steps: identifying the moment when the electric three-way valve is in a full-open or full-closed state, and starting timing; starting from the timing starting moment, collecting opening degree data of the electric three-way valve in a preset time period, and correcting the driving duty ratio of the electric three-way valve according to the opening degree data; the electric control three-way valve is controlled to execute the corrected driving duty ratio until the set learning time is reached, timing is ended, the actual maximum opening position and the actual minimum opening position of the electric three-way valve after the driving duty ratio is corrected are recognized, and then the set position of the electric three-way valve is corrected. The defect of feedback position deviation caused by switching frequency accumulation of the electric three-way valve is eliminated, and the thermal management control precision of the fuel cell is ensured.
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