A control method and system for an electric vehicle cooling water pump
A technology for cooling water pumps and electric vehicles, which is applied in the direction of pump control, power plant cooling combination arrangement, power plant, etc. It can solve the problems of large energy consumption, single speed regulation, and inability to adjust the speed of cooling demand.
Active Publication Date: 2020-05-05
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology
[0004] The invention provides a control method and system for a cooling water pump of an electric vehicle, which solves the problems of large energy consumption and single speed regulation in the existing electric vehicle, which only have two states of on and off in the control of the cooling water pump, and cannot adjust the speed according to the cooling demand. The service life of the cooling water pump and the working efficiency of the car cooling system
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[0041] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.
[0042] Aiming at the problem that the current control of the cooling water pump of electric vehicles only has two states of on and off, and the speed cannot be adjusted according to the temperature of the components, the present invention provides a method and system for controlling the cooling water pump of electric vehicles. The temperature of the drive motor sends speed-adjustable PWM waves with different duty ratios to the water pump controller to control the speed of the cooling water pump. It solves the problems of large energy consumption and single speed regulation in existing electric vehicles that only have two states of on and off for the control of the cooling water pump, and cannot adjust the speed a...
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The invention provides a control method and system of an electric automobile cooling water pump. The method comprises the following steps that a first corresponding table of correspondence between PWMwave duty ratio and the rotating speed of the cooling water pump is set; the temperature of a power battery of an electric automobile, the temperature of a DCDC converter and / or the temperature of adriving motor are obtained, and according to the temperature of the power battery, the temperature of the DCDC converter and / or the temperature of the driving motor, a vehicle controller transmits a speed control PWM wave corresponding to a duty ratio to a water pump controller; and the water pump controller receives the speed control PWM wave and then controls the rotating speed of the cooling water pump according to the first corresponding table. According to the control method and system, the service life of the cooling water pump can be prolonged, and the working efficiency of an automobile cooling system can be improved.
Description
technical field [0001] The invention relates to the technical field of electric vehicle control, in particular to a control method and system for a cooling water pump of an electric vehicle. Background technique [0002] Under the current automobile industry environment, electric vehicles have gained the attention of domestic and foreign OEMs, and are focusing on industrialized research and development. Judging from the current power cooling types of electric vehicles at home and abroad, most electric vehicles use liquid cooling systems, including radiators, fans, cooling water pipes and cooling water pumps. The cooling water pumps use centrifugal cooling water pumps to provide power for the cooling of the entire cooling system. . The cooling water pump is controlled by the vehicle controller, which can meet the cooling conditions of the vehicle charging and normal driving. [0003] In the existing liquid cooling system, the cooling water pump drives the cooling liquid to ...
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IPC IPC(8): F04D15/00F04D15/02B60K11/02
CPCB60K11/02F04D15/0066F04D15/0281
Inventor 何新华李萍
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD