Patent ID: 11919759
Assignee: ANHUI WEIDE POWER SUPPLY CO.,LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  F  H  Y | IPC B  F  H

Claim 7:
8. A control method for a liquid-cooled integrative power system for electric forklift, comprising the following steps:
step 1: receiving, with a vehicle controller, a drive demand signal, a hydraulic operation demand signal, a status of battery pack management system and request signal, and other information from the forklift; the drive demand signal comprising an accelerator pedal signal, a brake pedal signal, a gear switch signal and other information; the hydraulic operation demand signal comprising a lift potentiometer signal, a tilt switch signal, a related equipment signal and other information; the status of battery pack management system and request signal comprising battery state information, temperature information, current and voltage information, discharge rate permission information, and other bus information for a battery pack;
step 2: processing, with the vehicle controller, the drive demand signal, the hydraulic operation demand signal, the status of battery pack management system and request signal, and other information from the forklift, processing the information about the drive demand signal and the hydraulic operation demand signal received from the forklift according to the status of battery pack management system and request signal and other information, and supplying required power to a drive and hydraulic power system based on demand and quantity; outputting, with the vehicle controller, a drive control instruction and a hydraulic control instruction respectively to an integrated motor controller through a low-voltage power supply and a control wire harness according to operating and working states of the forklift, and then performing a coordinated control on a drive motor controller and an oil pump motor controller for current output; and
step 3: controlling, with the drive motor controller, a drive motor through a high-voltage connection and a low-voltage connection between the drive motor and the drive motor controller arranged inside a housing of the integrated motor controller; controlling, with the oil pump motor controller, an oil pump motor through a high-voltage connection and a low-voltage connection between the oil pump motor and the oil pump motor controller arranged inside the housing of the integrated motor controller; outputting externally power of the drive motor, as drive power, through a drive motor transmission mechanism, outputting power of the oil pump motor to an oil pump through an oil pump motor transmission mechanism, and outputting, with the oil pump, a high-pressure oil source to a hydraulic operating system; and finally, realizing drive operation and hydraulic steering of the electric forklift and work actions of the electric forklift executed based on hydraulic transmission.