CN-122009054-A - Voltage display control method under high voltage, whole vehicle controller, engineering machinery and medium

CN122009054ACN 122009054 ACN122009054 ACN 122009054ACN-122009054-A

Abstract

The application provides a high-voltage power down display control method, a whole vehicle controller, engineering machinery and a medium, and relates to the technical field of electric engineering machinery. The method comprises the steps of obtaining a power-down signal of the engineering machine, determining the power-down type of the engineering machine according to the power-down signal, executing normal power-down logic when the power-down type of the engineering machine is normal power-down and controlling the display screen of the engineering machine to be closed after the high voltage of the whole vehicle is detected, sending adhesion fault prompt information to the display screen of the engineering machine when the power-down type of the engineering machine is abnormal power-down and controlling the display screen of the engineering machine to be closed after the high voltage of the whole vehicle is detected. According to the method, the visualization of the high-voltage state of the whole vehicle can be realized through the display screen, so that the maintenance safety of engineering machinery is improved.

Inventors

TIAN PENGBO
WEI SHENGJIE
WANG JIN

Assignees

三一重机有限公司

Dates

Publication Date: 20260512
Application Date: 20260312

Claims (10)

1. The high-voltage power-down display control method of the engineering machinery is characterized by comprising the following steps of: Acquiring a power-down signal of engineering machinery, and determining the power-down type of the engineering machinery according to the power-down signal, wherein the power-down type comprises normal power-down and abnormal power-down; When the power-down type of the engineering machinery is normal power-down, executing normal power-down logic, and controlling a display screen of the engineering machinery to be closed after detecting the high voltage of the whole vehicle; When the power-down type of the engineering machinery is abnormal power-down, sending adhesion fault prompt information to a display screen of the engineering machinery, and controlling the display screen of the engineering machinery to be closed after the high-voltage of the whole vehicle is detected.
2. The method for controlling a high-voltage power-down display of a construction machine according to claim 1, wherein the step of acquiring a power-down signal of the construction machine and determining a power-down type of the construction machine based on the power-down signal comprises: Acquiring a power-down signal of engineering machinery, wherein the power-down signal comprises a normal power-down signal and a fault power-down signal; When the power-down signal is a normal power-down signal, determining that the power-down type of the engineering machinery is normal power-down; When the power-down signal is a fault power-down signal, determining whether the fault type corresponding to the fault power-down signal is a relay adhesion fault, if not, determining that the power-down type of the engineering machinery is normal power-down, and if so, determining that the power-down type of the engineering machinery is abnormal power-down.
3. The high-voltage electric display control method of the construction machine according to claim 2, wherein the fault type includes a relay adhesion fault and a whole vehicle operation fault; The relay adhesion fault comprises one or more of main positive relay adhesion, accessory relay adhesion and main negative relay adhesion.
4. The method for controlling high-voltage power down display of construction machine according to claim 3, wherein determining whether the fault type corresponding to the electrical signal under fault is a relay adhesion fault comprises: A first relay disconnection instruction is sent to a motor controller of the engineering machine, and a second relay disconnection instruction is sent to a battery management system of the engineering machine, wherein the first relay disconnection instruction is used for instructing the motor controller to disconnect a main positive relay and an accessory relay of a high-voltage loop, and the second relay disconnection instruction is used for instructing the battery management system to disconnect a main negative relay of the high-voltage loop; If the switching-off signal of the main positive relay or the accessory relay is not received within the preset time after the switching-off instruction of the first relay is sent, or the switching-off signal of the main negative relay is not received within the preset time after the switching-off instruction of the second relay is sent, determining that the fault type corresponding to the fault electrical signal is a relay adhesion fault; If the switching-off signals of the main positive relay and the accessory relay are received within the preset time after the switching-off instruction of the first relay is sent, and the switching-off signals of the main negative relay are received within the preset time after the switching-off instruction of the second relay is sent, determining that the fault type corresponding to the electrical signal under the fault is not relay adhesion fault.
5. The method for controlling power-down display of construction machine according to any one of claims 1 to 4, wherein executing the normal power-down logic and controlling the display of the construction machine to be turned off after detecting the high power-down of the whole vehicle comprises: A first relay disconnection instruction is sent to a motor controller of the engineering machine, and a second relay disconnection instruction is sent to a battery management system of the engineering machine, wherein the first relay disconnection instruction is used for instructing the motor controller to disconnect a main positive relay and an accessory relay of a high-voltage loop, and the second relay disconnection instruction is used for instructing the battery management system to disconnect a main negative relay of the high-voltage loop; after a preset time length, an active discharge instruction is sent to the motor controller; And acquiring the voltage of the direct current bus by using the motor controller, determining the lower high voltage of the whole vehicle after detecting that the voltage of the direct current bus is smaller than the preset safety voltage, and sending a closing instruction to a display screen of the engineering machinery so as to control the display screen to be closed.
6. The method for controlling power-on and power-off display of a construction machine according to any one of claims 1 to 4, wherein the sending the adhesion failure prompt message to the display of the construction machine, and controlling the display of the construction machine to be turned off after detecting the high power-on and power-off of the whole vehicle, comprises: sending adhesion fault information to a display screen of the engineering machinery, wherein the adhesion fault information comprises a fault type, a fault node and a fault operation method; sending an acousto-optic reminding instruction to a display screen of the engineering machinery, wherein the acousto-optic reminding instruction is used for indicating an operator to perform fault processing according to the adhesion fault information; And acquiring the voltage of the direct current bus by using a motor controller, determining the lower high voltage of the whole vehicle after detecting that the voltage of the direct current bus is smaller than the preset safety voltage, and sending a closing instruction to a display screen of the engineering machinery so as to control the display screen to be closed.
7. The high-voltage power down display control method of a construction machine according to claim 6, wherein the failure operation method includes any one of: manually opening a manual maintenance switch of the battery management system; The leakage protection cabinet electric gate is manually disconnected.
8. An overall vehicle controller, comprising: A processor, and a memory communicatively coupled to the processor; The memory is used for storing computer execution instructions; The processor is configured to execute computer-executable instructions stored in the memory, so that the processor executes the high-voltage power down display control method of the construction machine according to any one of claims 1 to 7.
9. An electric engineering machine is characterized by comprising a motor controller, a battery management system, a high-voltage loop, a display screen and the whole vehicle controller as claimed in claim 8, wherein the motor controller, the battery management system and the display screen are respectively and electrically connected with the whole vehicle controller; The high-voltage loop comprises a main positive relay, an accessory relay and a main negative relay, wherein the main positive relay and the accessory relay are respectively and electrically connected with the motor controller, and the main negative relay is electrically connected with the battery management system.
10. A computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, which when executed by a processor, are configured to implement the high-voltage power down display control method of the construction machine according to any one of claims 1 to 7.

Description

Voltage display control method under high voltage, whole vehicle controller, engineering machinery and medium Technical Field The application relates to the technical field of electric engineering machinery, in particular to a high-voltage power down display control method, a whole vehicle controller, engineering machinery and a medium. Background Engineering machinery driven by high-voltage systems are becoming increasingly popular, and the presence of high-voltage systems also presents a significant safety risk. When equipment is repaired, maintained or troubleshooted, maintenance personnel need to ensure that the high-voltage system is completely powered off so as to avoid electric shock accidents. In the related art, two modes of turning a key and pressing a key start button for high-voltage power supply and power off of engineering machinery are that timing is started after the disappearance of the power supply of the system 15 (a signal of the system KeyOn) is detected, and after the system delay time is reached, a high-voltage process for the whole vehicle is executed, and a whole vehicle controller (Vehicle Control Unit, VCU) is dormant. However, the high-voltage process under the whole vehicle is automatically executed, a maintainer cannot judge the state of the high-voltage system of the engineering machinery, and the high-voltage system may have a fault that the high-voltage circuit (such as a relay) cannot be disconnected due to physical adhesion, so that the high-voltage circuit still has high-voltage electricity after the execution of the high-voltage process under the whole vehicle is finished, and the maintainer is at risk of high-voltage electric shock during maintenance operation. Therefore, a high-voltage display control scheme capable of realizing visualization of the high-voltage state of the whole vehicle, thereby improving the maintenance safety of the engineering machinery is needed. Disclosure of Invention The embodiment of the application provides a high-voltage power down display control method, a whole vehicle controller, engineering machinery and a medium, which can realize the visualization of the high-voltage state of the whole vehicle, thereby improving the maintenance safety of the engineering machinery. In a first aspect, an embodiment of the present application provides a method for controlling high-voltage power down display of an engineering machine, including: Acquiring a power-down signal of engineering machinery, and determining the power-down type of the engineering machinery according to the power-down signal, wherein the power-down type comprises normal power-down and abnormal power-down; When the power-down type of the engineering machinery is normal power-down, executing normal power-down logic, and controlling a display screen of the engineering machinery to be closed after detecting the high voltage of the whole vehicle; When the power-down type of the engineering machinery is abnormal power-down, sending adhesion fault prompt information to a display screen of the engineering machinery, and controlling the display screen of the engineering machinery to be closed after the high-voltage of the whole vehicle is detected. In one possible implementation manner, the acquiring the power-down signal of the engineering machine and determining the power-down type of the engineering machine according to the power-down signal includes: Acquiring a power-down signal of engineering machinery, wherein the power-down signal comprises a normal power-down signal and a fault power-down signal; and when the power-down signal is a normal power-down signal, determining that the power-down type of the engineering machinery is normal power-down. When the power-down signal is a fault power-down signal, determining whether the fault type corresponding to the fault power-down signal is a relay adhesion fault, if not, determining that the power-down type of the engineering machinery is normal power-down, and if so, determining that the power-down type of the engineering machinery is abnormal power-down. In one possible implementation, the fault types include relay adhesion faults and vehicle operation faults; The relay adhesion fault comprises one or more of main positive relay adhesion, accessory relay adhesion and main negative relay adhesion. In one possible implementation manner, the determining whether the fault type corresponding to the electrical signal under the fault is a relay adhesion fault includes: A first relay disconnection instruction is sent to a motor controller of the engineering machine, and a second relay disconnection instruction is sent to a battery management system of the engineering machine, wherein the first relay disconnection instruction is used for instructing the motor controller to disconnect a main positive relay and an accessory relay of a high-voltage loop, and the second relay disconnection instruction is used for instructing the battery management sys