Control method of three-way valve assembly of cooling system of new energy vehicle

Abstract

The invention discloses a three-way valve assembly of a new energy vehicle cooling system and a control method and belongs to the technical field of new energy vehicles. Through the three-way valve assembly of the new energy vehicle cooling system and the control method, the problems of poor leakproofness, jamming, instable work, low precision, high cost and the like in the prior art are solved, and high applicability is achieved particularly for special occasions with strict requirements for work environment and performance. The three-way valve assembly of the new energy vehicle cooling system comprises a three-way valve shell and a three-way valve core. A drive drives the three-way valve core to rotate, and then a cooling liquid channel is adjusted. The drive comprises a worm-gear transmission mechanism driven by a motor, and a worm gear is connected with a reduction gear unit. The three-way valve core is installed on a reduction gear of the reduction gear unit. The angle needed by rotation of the motor is controlled by a controller. The three-way valve assembly of the new energy vehicle cooling system and the control method have the advantages that structure is reasonable, application range is wide, and work is stable and reliable, and good economic benefits and wide market prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a high-performance three-way valve assembly, a control system and a method for a cooling system of a new energy vehicle. Background technique [0002] At present, the coolant in new energy vehicles requires special three-way valves to form passages and circuits. For special needs and special occasions, the structural sealing, structural transmission stability and precise control of three-way valves are highly required, especially The accuracy of the three-way valve control is the key to accurately control the liquid flow of the three-way valve, such as cooling the internal cooling pipes of the battery pack in new energy vehicles or the cooling of special parts such as precision ECU control chips. Today's three-way valves often drive the valve stem of the three-way valve to move axially by means of electromagnets and rack and pinions, thereby opening different passages...

AI Technical Summary

Problems solved by technology

Today's three-way valves often drive the valve stem of the three-way valve to move axially by means of electromagnets and rack and pinions, thereby opening different passages, but this structure often has many deficiencies, such as: 1. The sealing performance between the valve core and the valve body of the three-way valve is not good. Because the sealing contact surface is not large enough, liquid leakage is prone to occur; 2. The valve stem is prone to jamming during the axial movement; 3. The transmission mechanism needs Converting rotary motion into linear motion, the transmission is prone to errors and the work is not reliable; 4. In addition, the existing three-way valve structure and control technology cannot meet the special high-precision and high-stability requirements. If the cost of precise control is achieved by adding auxiliary sensors higher

Studies have found that long-term use, especially under high temperature and high pressure, will cause wear / corrosion of the internal transmission components (spool valve body, etc.) and external drive components (such as gears, racks, etc.) of the three-way valve. The superimposed wear / corrosion problem of the internal and external transmission systems of the valve will produce superimposed travel errors, resulting in reduced control accuracy and stability, but the existing technology has no means to solve this problem, and the auxiliary detection and correction of multiple sensors will bring cost increase

Images