High-voltage power-down display control method, vehicle control unit, engineering machinery and medium

Abstract

The invention provides a high-voltage power-down display control method, a vehicle control unit, engineering machinery and a medium, and relates to the technical field of electric engineering machinery. The method comprises the steps that a power-off signal of the engineering machine is acquired, the power-off type of the engineering machine is determined according to the power-off signal, and the power-off type comprises normal power-off and abnormal power-off; when the power-off type of the engineering machinery is normal power-off, normal power-off logic is executed, and a display screen of the engineering machinery is controlled to be turned off after high-voltage power-off of the whole vehicle is detected; and when the power-off type of the engineering machinery is abnormal power-off, 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 detecting that the whole vehicle is in high voltage. According to the method, visualization of the high-voltage state of the whole vehicle can be achieved through the display screen, and therefore the safety of engineering machinery maintenance is improved.

Description

Technical Field

[0001] This application relates to the field of electric construction machinery technology, and in particular to a high-voltage power display control method, a vehicle controller, construction machinery, and a medium. Background Technology

[0002] As high-voltage systems become increasingly common in construction machinery, their presence also brings significant safety risks. During equipment maintenance, repair, or troubleshooting, personnel must ensure that the high-voltage system is completely de-energized to prevent electric shock accidents.

[0003] In related technologies, there are two methods for shutting down and energizing construction machinery: turning the key and pressing the one-button start. Both methods begin timing after the system's KeyOn signal (15) disappears. After the system delay time is reached, the high-voltage shutdown process is executed, and the Vehicle Control Unit (VCU) goes into sleep mode. However, the high-voltage shutdown process is automatic, and maintenance personnel cannot determine the status of the construction machinery's high-voltage system. Furthermore, the high-voltage system may experience physical adhesion in high-voltage circuits (such as relays), preventing the high voltage from being disconnected. This results in high-voltage electricity remaining in the high-voltage circuit even after the high-voltage shutdown process is completed, posing a risk of electric shock to maintenance personnel during repair work.

[0004] Therefore, a high-voltage power display control scheme is needed to visualize the high-voltage status of the entire vehicle, thereby improving the safety of engineering machinery maintenance. Summary of the Invention

[0005] This application provides a high-voltage power display control method, a vehicle controller, construction machinery, and a medium, which enables visualization of the high-voltage status of the entire vehicle, thereby improving the safety of construction machinery maintenance.

[0006] In a first aspect, embodiments of this application provide a high-voltage power display control method for engineering machinery, comprising:

[0007] Acquire the power-down signal of the construction machinery, and determine the power-down type of the construction machinery based on the power-down signal, wherein the power-down type includes normal power-down and abnormal power-down;

[0008] When the power-down type of the construction machinery is normal power-down, the normal power-down logic is executed, and the display screen of the construction machinery is turned off after the high voltage of the whole vehicle is detected.

[0009] When the power-down type of the construction machinery is abnormal power-down, an adhesion fault prompt message is sent to the display screen of the construction machinery, and the display screen of the construction machinery is turned off after the high voltage of the whole vehicle is detected.

[0010] In one possible implementation, acquiring the power-down signal of the construction machinery and determining the power-down type of the construction machinery based on the power-down signal includes:

[0011] Acquire the power-off signal of the construction machinery, the power-off signal including normal power-off signal and fault power-off signal;

[0012] When the power-down signal is a normal power-down signal, the power-down type of the engineering machinery is determined to be normal power-down.

[0013] When the power-down signal is a fault power-down signal, determine whether the fault type corresponding to the fault power-down signal is a relay sticking fault; if it is not a relay sticking fault, determine that the power-down type of the construction machinery is normal power-down; if it is a relay sticking fault, determine that the power-down type of the construction machinery is abnormal power-down.

[0014] In one possible implementation, the fault types include relay sticking faults and vehicle operation faults;

[0015] The relay sticking fault includes one or more of the following: main positive relay sticking, accessory relay sticking, and main negative relay sticking.

[0016] In one possible implementation, determining whether the fault type corresponding to the fault signal is a relay sticking fault includes:

[0017] A first relay disconnect command is sent to the motor controller of the construction machinery, and a second relay disconnect command is sent to the battery management system of the construction machinery. The first relay disconnect command is used to instruct the motor controller to disconnect the main positive relay and the accessory relay of the high voltage circuit, and the second relay disconnect command is used to instruct the battery management system to disconnect the main negative relay of the high voltage circuit.

[0018] If no disconnection signal from the main positive relay or the auxiliary relay is received within a preset time period after sending the first relay disconnection command, or no disconnection signal from the main negative relay is received within a preset time period after sending the second relay disconnection command, then the fault type corresponding to the fault electrical signal is determined to be a relay sticking fault.

[0019] If the disconnection signals of the main positive relay and the auxiliary relay are received within a preset time after the first relay disconnection command is sent, and the disconnection signal of the main negative relay is received within a preset time after the second relay disconnection command is sent, then it is determined that the fault type corresponding to the fault electrical signal is not a relay sticking fault.

[0020] In one possible implementation, the execution of normal power-down logic and the control of the display screen of the construction machinery to turn off after detecting high voltage drop across the vehicle includes:

[0021] A first relay disconnect command is sent to the motor controller of the construction machinery, and a second relay disconnect command is sent to the battery management system of the construction machinery. The first relay disconnect command is used to instruct the motor controller to disconnect the main positive relay and the accessory relay of the high voltage circuit, and the second relay disconnect command is used to instruct the battery management system to disconnect the main negative relay of the high voltage circuit.

[0022] After a preset time, an active discharge command is sent to the motor controller;

[0023] The DC bus voltage is obtained using the motor controller, and after detecting that the DC bus voltage is less than the preset safe voltage, the high voltage of the whole vehicle is determined, and a shutdown command is sent to the display screen of the construction machinery to control the display screen to turn off.

[0024] In one possible implementation, sending an adhesion fault warning message to the display screen of the construction machinery and controlling the display screen of the construction machinery to turn off after detecting high pressure on the entire vehicle includes:

[0025] Send adhesion fault information to the display screen of the construction machinery. The adhesion fault information includes fault type, fault node and fault operation method.

[0026] Send an audio-visual alert command to the display screen of the construction machinery, the audio-visual alert command being used to instruct the operator to handle the fault according to the adhesion fault information;

[0027] The DC bus voltage is obtained using the motor controller, and after detecting that the DC bus voltage is less than the preset safe voltage, the high voltage of the whole vehicle is determined, and a shutdown command is sent to the display screen of the construction machinery to control the display screen to turn off.

[0028] In one possible implementation, the fault operation method includes any one of the following:

[0029] Manually disconnect the manual maintenance switch of the battery management system;

[0030] Manually disconnect the circuit breaker of the leakage protection cabinet.

[0031] Secondly, embodiments of this application provide a vehicle controller, including:

[0032] The acquisition module is used to acquire the power-down signal of the construction machinery and determine the power-down type of the construction machinery based on the power-down signal. The power-down type includes normal power-down and abnormal power-down.

[0033] The processing module is used to execute normal power-down logic when the power-down type of the construction machinery is normal power-down, and control the display screen of the construction machinery to turn off after detecting that the whole vehicle is under high voltage; when the power-down type of the construction machinery is abnormal power-down, send adhesion fault prompt information to the display screen of the construction machinery, and control the display screen of the construction machinery to turn off after detecting that the whole vehicle is under high voltage.

[0034] Thirdly, embodiments of this application provide another vehicle controller, including:

[0035] The processor, and the memory that is in communication with the processor;

[0036] Memory is used to store instructions that the computer executes;

[0037] The processor is configured to execute computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0038] Fourthly, this application provides an electric construction machinery, including: a motor controller, a battery management system, a high-voltage circuit, a display screen, and a vehicle controller as described in the third aspect, wherein the motor controller, the battery management system, and the display screen are electrically connected to the vehicle controller.

[0039] The high-voltage circuit includes a main positive relay, an accessory relay, and a main negative relay. The main positive relay and the accessory relay are electrically connected to the motor controller, and the main negative relay is electrically connected to the battery management system.

[0040] Fifthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect described above.

[0041] In a sixth aspect, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, is used to implement the first aspect and / or various possible implementations of the first aspect as described above.

[0042] This application provides a high-voltage power-off display control method, a vehicle controller, construction machinery, and a medium. When the construction machinery is powered down, the power-off type can be determined based on the power-off signal, and corresponding power-off logic can be executed according to different power-off types. When the power-off type of the construction machinery is normal power-off, normal power-off logic is executed, and the display screen of the construction machinery is controlled to turn off after detecting that the vehicle is under high voltage. When the power-off type of the construction machinery is abnormal power-off, a sticking fault prompt message is sent to the display screen of the construction machinery, and the display screen is controlled to turn off after detecting that the vehicle is under high voltage. Through this setting, the high-voltage status of the vehicle can be deeply coupled with the display screen's off state, enabling visualization of the vehicle's high-voltage status through the display screen. Whether it is a normal or abnormal power-off, as long as the display screen is on, the vehicle is under high voltage; when the display screen is off, the vehicle is not under high voltage. Maintenance personnel can determine the high-voltage status of the vehicle by checking the status of the display screen, improving the safety of construction machinery maintenance. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] Figure 1 This is a system architecture diagram of an embodiment of this application;

[0045] Figure 2 This is a flowchart of a high-voltage power display control method for engineering machinery according to an embodiment of this application;

[0046] Figure 3 This is a schematic diagram of the structure of a vehicle controller according to an embodiment of this application;

[0047] Figure 4 This is a schematic diagram of the structure of a vehicle controller according to another embodiment of this application.

[0048] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0049] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0050] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0051] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, it does not mean that the applicant has used or necessarily used the solution.

[0052] It should also be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with relevant laws, regulations and standards, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0053] The high-voltage power-down display control method, vehicle controller, construction machinery, and medium of this application can be used in the field of electric construction machinery, or in any other field besides electric construction machinery, such as the field of power-down control. The application fields of the high-voltage power-down display control method, vehicle controller, construction machinery, and medium of this application are not limited.

[0054] The high-voltage power display control method, vehicle controller, construction machinery, and medium of this application can be applied to scenarios such as fault repair, maintenance, and repair of construction machinery. The construction machinery can be electric construction machinery or hybrid construction machinery. As long as the construction machinery includes a high-voltage system, the high-voltage power display control method, vehicle controller, construction machinery, and medium of this application can be applied.

[0055] Electric or hybrid construction machinery is becoming an important tool for energy conservation, emission reduction, and noise reduction at construction sites, and its usage and proportion are increasing. However, due to the harsh environment and high-intensity working conditions at construction sites, strict requirements are placed on the maintenance and repair of the equipment.

[0056] Electric or hybrid construction machinery can be driven by high-voltage systems. The presence of these systems also brings significant safety risks, making the personal safety of maintenance personnel paramount. During equipment repair, maintenance, or troubleshooting, personnel must ensure that the vehicle has been de-energized and that all capacitors and inductors in the relevant high-voltage circuits have discharged to prevent electric shock.

[0057] In related technologies, there are two ways to shut down construction machinery by turning the key and pressing the one-button start button. In both cases, the timing starts after the system 15 power (system KeyOn signal) is detected to disappear. After the system delay time is reached, the high-voltage process of the whole vehicle is executed and the vehicle control unit (VCU) goes into sleep mode.

[0058] However, the high-voltage removal process for the entire vehicle is executed automatically, and maintenance personnel cannot determine the status of the high-voltage system of the construction machinery. The high-voltage system may experience physical adhesion of high-voltage circuits (such as relays), which may prevent the high voltage from being disconnected. This means that high voltage may still exist in the high-voltage circuit after the high-voltage removal process for the entire vehicle is completed, thus posing a risk of electric shock to maintenance personnel when performing maintenance work.

[0059] Based on the above-mentioned technical problems, the inventive concept of this application is: how to provide a high-voltage power display control scheme that can realize the visualization of the high-voltage status of the whole vehicle, thereby improving the safety of engineering machinery maintenance.

[0060] This application provides a high-voltage power-off display control method, a vehicle controller, construction machinery, and a medium. When the construction machinery is powered down, the power-off type can be determined based on the power-off signal, and corresponding power-off logic can be executed according to different power-off types. When the power-off type of the construction machinery is normal power-off, normal power-off logic is executed, and the display screen of the construction machinery is controlled to turn off after detecting that the vehicle is under high voltage. When the power-off type of the construction machinery is abnormal power-off, a sticking fault prompt message is sent to the display screen of the construction machinery, and the display screen is controlled to turn off after detecting that the vehicle is under high voltage. Through this setting, the high-voltage status of the vehicle can be deeply coupled with the display screen's off state, enabling visualization of the vehicle's high-voltage status through the display screen. Whether it is a normal or abnormal power-off, as long as the display screen is on, the vehicle is under high voltage; when the display screen is off, the vehicle is not under high voltage. Maintenance personnel can determine the high-voltage status of the vehicle by checking the status of the display screen, improving the safety of construction machinery maintenance.

[0061] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0062] Figure 1 This is a system architecture diagram of an embodiment of this application, such as... Figure 1 As shown, the construction machinery may include: a motor controller, a battery management system, a high-voltage circuit, a display screen, and a vehicle controller. The motor controller, battery management system, and display screen are electrically connected to the vehicle controller. The high-voltage circuit includes a main positive relay, an accessory relay, and a main negative relay. The main positive relay and accessory relay are electrically connected to the motor controller, and the main negative relay is electrically connected to the battery management system. The vehicle controller can acquire the power-down signal of the construction machinery and determine the power-down type based on the signal. The power-down type includes normal power-down and abnormal power-down. When the power-down type is normal power-down, the normal power-down logic is executed, and the display screen of the construction machinery is turned off after the high voltage of the vehicle is detected. When the power-down type is abnormal power-down, a sticking fault warning message is sent to the display screen of the construction machinery, and the display screen of the construction machinery is turned off after the high voltage of the vehicle is detected.

[0063] Figure 2 This is a flowchart illustrating a high-voltage power-off display control method for construction machinery according to an embodiment of this application. This embodiment describes the high-voltage power-off display control method for construction machinery with the vehicle controller as the executing entity. Figure 2 As shown, the high-voltage electrical display control method for this construction machinery may include the following steps:

[0064] S201: Obtain the power-down signal of the construction machinery and determine the power-down type of the construction machinery based on the power-down signal.

[0065] In this embodiment, the power-down types include normal power-down and abnormal power-down.

[0066] In this embodiment, during normal power-down, executing the normal power-down logic can reduce the high voltage of the entire vehicle; during abnormal power-down, executing the normal power-down logic cannot reduce the high voltage of the entire vehicle, and other measures need to be taken.

[0067] In this embodiment, the power-off signal can be a power-off signal sent by the maintenance personnel turning the key or pressing the one-button start button (system KeyOff signal, or system KeyOn signal disappearing for a certain period of time), or it can be a high-level fault generated during system operation or other situations that require high voltage. High-level faults can be: for example, VCU no communication signal, battery management system (BMS) failure, or other faults that affect the normal operation of the vehicle, or physical adhesion faults of high-voltage circuit relays, etc.

[0068] S202: When the power-down type of the construction machinery is normal power-down, execute the normal power-down logic and control the display screen of the construction machinery to turn off after detecting that the whole vehicle is under high voltage.

[0069] In this embodiment, when the power-down type of the construction machinery is normal power-down, the normal power-down logic can be executed to realize the high voltage of the whole vehicle. After the VCU detects that the high voltage of the whole vehicle is down, it can control the display screen of the construction machinery to turn off, so that the maintenance personnel can see that the whole vehicle is in a high voltage state when the display screen is on, and that the whole vehicle has been de-energized when the display screen is off.

[0070] S203: When the power-down type of the construction machinery is abnormal power-down, send an adhesion fault prompt message to the display screen of the construction machinery, and control the display screen of the construction machinery to turn off after detecting that the whole vehicle is under high pressure.

[0071] In this embodiment, when the power-down type of the construction machinery is abnormal power-down, the normal power-down logic cannot realize the de-energization of the entire vehicle. The VCU can send an adhesion fault prompt message to the display screen of the construction machinery to prompt the maintenance personnel to take corresponding operations to safely disconnect the high voltage of the entire vehicle based on the adhesion fault prompt message.

[0072] In this embodiment, after the maintenance personnel disconnect the high voltage of the vehicle by taking appropriate actions, the VCU will control the display screen of the construction machinery to turn off after detecting that the high voltage of the vehicle has been deactivated. This way, the maintenance personnel can know that the high voltage of the vehicle has been deactivated when they see the display screen in the off state, thus avoiding the risk of high voltage electric shock caused by misoperation.

[0073] In this embodiment, when the construction machinery is powered down, the power-down type can be determined based on the power-down signal, and corresponding power-down logic can be executed according to different power-down types. When the power-down type of the construction machinery is normal power-down, normal power-down logic is executed, and the display screen of the construction machinery is controlled to turn off after detecting that the entire vehicle is under high voltage. When the power-down type of the construction machinery is abnormal power-down, a sticking fault prompt message is sent to the display screen of the construction machinery, and the display screen of the construction machinery is controlled to turn off after detecting that the entire vehicle is under high voltage. Through this setting, the high voltage status of the entire vehicle can be deeply coupled with the display screen's off state, and the high voltage status of the entire vehicle can be visualized through the display screen. Whether it is normal power-down or abnormal power-down, as long as the display screen is on, the entire vehicle is under high voltage, and when the display screen is off, the entire vehicle is not under high voltage. Maintenance personnel can determine the high voltage status of the entire vehicle by checking the status of the display screen, thereby improving the safety of construction machinery maintenance.

[0074] In one possible implementation, step S201, which involves acquiring the power-down signal of the construction machinery and determining the power-down type of the construction machinery based on the power-down signal, may include:

[0075] S11: Obtain the power-off signal of the construction machinery. The power-off signal includes normal power-off signal and fault power-off signal.

[0076] S12: When the current power-off signal is a normal power-off signal, determine that the power-off type of the construction machinery is normal power-off.

[0077] S13: When the current signal is a fault signal, determine whether the fault type corresponding to the fault signal is a relay sticking fault.

[0078] S14: If it is not a relay sticking fault, then the power-down type of the construction machinery is determined to be normal power-down.

[0079] S15: If the fault is relay sticking, then the power-down type of the construction machinery is determined to be abnormal power-down.

[0080] In this embodiment, the normal power-off signal can be a power-off signal sent by the maintenance personnel turning the key or pressing the one-button start button (system KeyOff signal, or system KeyOn signal disappearing for a certain period of time).

[0081] In this embodiment, the fault signal can be a fault message generated during system operation, such as a fault message generated by a fault that affects the normal operation of the vehicle or requires the reduction of high voltage, such as a VCU without communication signal, a BMS fault, or a high-voltage circuit relay physically sticking together.

[0082] In this embodiment, the relay sticking fault can be a fault in which the relay in the high-voltage circuit of the system sticks together and cannot be disconnected.

[0083] In this embodiment, the power-down signals of construction machinery can be divided into two main categories: normal power-down signals and fault power-down signals. Fault power-down signals are further subdivided into whether they are relay sticking faults. When it is a normal power-down signal, or when the fault type corresponding to the fault power-down signal is not a relay sticking fault, executing the normal power-down logic can achieve high-voltage reduction for the entire vehicle. Only when the fault type corresponding to the fault power-down signal is a relay sticking fault, and executing the normal power-down logic cannot achieve high-voltage reduction for the entire vehicle, can the power-down type of the construction machinery be determined to be an abnormal power-down.

[0084] In one possible implementation, the fault type may include relay sticking fault and vehicle operation fault;

[0085] Relay sticking faults can include one or more of the following: sticking of the main positive relay, sticking of the accessory relay, and sticking of the main negative relay.

[0086] In this embodiment, vehicle operation failures can be caused by faults that affect the normal operation of the vehicle, such as no communication signal from the VCU, no communication signal from the Motor Control Unit (MCU), or BMS failure.

[0087] In this embodiment, adhesion of the main positive relay and the accessory relay will result in high voltage but no current in the high-voltage circuit, while adhesion of the main negative relay will result in both high voltage and current in the high-voltage circuit. Adhesion of any one of the main positive relay, accessory relay, or main negative relay will cause a risk of high-voltage electric shock.

[0088] In this embodiment, based on whether the normal power-down logic can be executed to achieve high voltage reduction for the entire vehicle, the fault types can be divided into relay sticking faults and vehicle operation faults. Vehicle operation faults do not affect the normal power-down process and can be performed normally. However, sticking of any one of the main positive relay, accessory relay, or main negative relay in the high-voltage circuit will prevent the vehicle from achieving high voltage reduction even when the normal power-down logic is executed.

[0089] In one possible implementation, determining whether the fault type corresponding to the fault-prone electrical signal in step S13 is a relay sticking fault may include:

[0090] S21: Send a first relay disconnect command to the motor controller of the construction machinery and a second relay disconnect command to the battery management system of the construction machinery. The first relay disconnect command is used to instruct the motor controller to disconnect the main positive relay and accessory relay of the high voltage circuit, and the second relay disconnect command is used to instruct the battery management system to disconnect the main negative relay of the high voltage circuit.

[0091] S22: If no disconnection signal from the main positive relay or the auxiliary relay is received within a preset time after sending the first relay disconnection command, or no disconnection signal from the main negative relay is received within a preset time after sending the second relay disconnection command, then the fault type corresponding to the fault signal is determined to be a relay sticking fault.

[0092] S23: If the disconnection signals of the main positive relay and the auxiliary relay are received within a preset time after the first relay disconnection command is sent, and the disconnection signal of the main negative relay is received within a preset time after the second relay disconnection command is sent, then it is determined that the fault type corresponding to the fault signal is not a relay sticking fault.

[0093] In this embodiment, the preset duration can be set by those skilled in the art based on the reaction time of the relay receiving the signal, and no restrictions are imposed here.

[0094] In this embodiment, the MCU can control the on / off state of the main positive relay and the auxiliary relay, and the BMS can control the on / off state of the main negative relay. The BMS can also be replaced by an ACCDC uncontrolled rectifier, that is, the ACCDC is used to control the on / off state of the main negative relay.

[0095] In this embodiment, the VCU can send instructions to the MCU to disconnect the main positive relay and the auxiliary relay, and send instructions to the BMS to disconnect the main negative relay. If the main positive relay, the auxiliary relay, and the main negative relay all disconnect within a certain period of time after the instructions are issued, it indicates that no relay sticking fault has occurred. If any one of the main positive relay, the auxiliary relay, and the main negative relay fails to disconnect within a certain period of time after the instructions are issued, it indicates that a relay sticking fault has occurred.

[0096] In one possible implementation, the execution of normal power-down logic in step S202 above, and controlling the display screen of the construction machinery to turn off after detecting that the vehicle is under high voltage, may include:

[0097] S31: Send a first relay disconnect command to the motor controller of the construction machinery and a second relay disconnect command to the battery management system of the construction machinery. The first relay disconnect command is used to instruct the motor controller to disconnect the main positive relay and the accessory relay of the high voltage circuit, and the second relay disconnect command is used to instruct the battery management system to disconnect the main negative relay of the high voltage circuit.

[0098] S32: Sends an active discharge command to the motor controller after a preset time.

[0099] S33: The DC bus voltage is obtained using the motor controller, and after detecting that the DC bus voltage is less than the preset safe voltage, the high voltage of the whole vehicle is determined, and a shutdown command is sent to the display screen of the construction machinery to control the display screen to turn off.

[0100] In this embodiment, before sending the first relay disconnect command and the second relay disconnect command, the VCU can disable the MCU's main drive and accessories enable. After the MCU provides feedback on the working status of the main drive and accessories, the first relay disconnect command and the second relay disconnect command are sent.

[0101] In this embodiment, sending an active discharge command to the motor controller after a preset time period can be done after receiving the main positive relay and accessory relay disconnection signals from the MCU and the main negative relay disconnection signal from the BMS (ACDC) within the preset time period.

[0102] In this embodiment, the safety voltage can be flexibly set according to actual conditions by those skilled in the art; for example, it can be 36V, and no restrictions are imposed here.

[0103] In this embodiment, during normal power-down, the main positive relay, accessory relay, and main negative relay can be disconnected first. After all relays are disconnected, an active discharge command is sent to the MCU. Once the DC bus voltage drops below the safe voltage, it can be determined that the vehicle is under high voltage. The display screen can be turned off so that maintenance personnel can see that the vehicle is under high voltage when the display screen is on, and that the vehicle is under high voltage when the display screen is off.

[0104] In one possible implementation, step S203 above, which involves sending an adhesion fault warning message to the display screen of the construction machinery and controlling the display screen of the construction machinery to turn off after detecting high pressure on the entire vehicle, may include:

[0105] S41: Send adhesion fault information to the display screen of the construction machinery. The adhesion fault information includes the fault type, fault node, and fault operation method.

[0106] S42: Send an audible and visual alert command to the display screen of the construction machinery. The audible and visual alert command is used to instruct the operator to handle the fault based on the adhesion fault information.

[0107] S43: The DC bus voltage is obtained using the motor controller, and after detecting that the DC bus voltage is less than the preset safe voltage, the high voltage of the whole vehicle is determined, and a shutdown command is sent to the display screen of the construction machinery to control the display screen to turn off.

[0108] In this embodiment, the adhesion fault information can be text information and / or image information, and the fault node can be information such as the name and location of the relay that is stuck.

[0109] In this embodiment, when sending a shutdown command to the display screen of the construction machinery, a command to turn off the audio-visual reminder can also be sent to the display screen.

[0110] In this embodiment, when an abnormal power-off occurs, since the relay is stuck and cannot automatically disconnect the high voltage of the entire vehicle, it is necessary to send a sticking fault information and an audible and visual reminder command to the display screen of the construction machinery to prompt the operator to manually handle the fault according to the sticking fault information. Only after the operator manually operates to disconnect the high voltage of the entire vehicle will the display screen be turned off, so that maintenance personnel can know that the high voltage of the entire vehicle has been disconnected when they see the display screen in the off state, in order to avoid the risk of high voltage electric shock caused by misoperation.

[0111] In one possible implementation, the above-described fault operation method may include any one of the following:

[0112] A: Manually disconnect the manual maintenance switch of the battery management system;

[0113] B: Manually disconnect the circuit breaker of the leakage protection cabinet.

[0114] In this embodiment, the fault operation method is not limited to manually disconnecting the manual maintenance switch of the BMS or manually disconnecting the leakage protection cabinet circuit breaker; any method that can reduce the high voltage of the entire vehicle can be used as the fault operation method.

[0115] In this embodiment, the entire vehicle can be de-energized by manually disconnecting the manual maintenance switch of the BMS or manually disconnecting the circuit breaker of the leakage protection cabinet.

[0116] The high-voltage electrical display control method for engineering machinery of this application is described below with several specific embodiments.

[0117] In one specific embodiment, after an electric excavator finishes operation, it needs to undergo high-pressure treatment of the entire vehicle. The specific process is as follows:

[0118] The first step is for the operator of the electric excavator to turn the key to send a shutdown signal to the vehicle controller. After receiving the signal, the vehicle controller determines that the shutdown signal is a normal power-off signal and disables the MCU's main drive and accessory enable.

[0119] The second step is that after the vehicle controller receives feedback from the MCU on the working status of the main drive and accessories, it sends a first relay disconnect command to the MCU and a second relay disconnect command to the BMS. The first relay disconnect command is used to instruct the MCU to disconnect the main positive relay and accessory relay in the high-voltage circuit, and the second relay disconnect command is used to instruct the BMS to disconnect the main negative relay in the high-voltage circuit.

[0120] The third step involves the vehicle controller waiting for the MCU to report that the main positive relay and the accessory relay are disconnected within a preset time period, and the BMS to report that the main negative relay is disconnected within a preset time period, and then sending an active discharge command to the MCU.

[0121] Fourth, after the MCU reports a DC bus voltage below 36V, the vehicle controller sends a shutdown command to the display screen to turn it off. The vehicle controller then enters sleep mode, and the high-voltage shutdown of the vehicle is complete. Maintenance personnel will see the display screen is off, indicating that the high-voltage shutdown has been completed, and the electric excavator can then be serviced.

[0122] In another specific embodiment, an electric excavator malfunctions during operation and requires high-pressure treatment of the entire vehicle. The specific process is as follows:

[0123] The first step is for the vehicle controller of the electric excavator to obtain the fault message and determine that the fault message is a fault power-off signal. It then sends a first relay disconnect command to the MCU and a second relay disconnect command to the BMS. The first relay disconnect command is used to instruct the MCU to disconnect the main positive relay and accessory relay of the high-voltage circuit, and the second relay disconnect command is used to instruct the BMS to disconnect the main negative relay of the high-voltage circuit.

[0124] The second step is that if the vehicle controller receives a signal from the MCU that the main positive relay and the accessory relay are disconnected within a preset time, and does not receive a signal from the BMS that the main negative relay is disconnected within a preset time, then the fault type corresponding to the fault message is determined to be a relay sticking fault.

[0125] The third step is for the vehicle controller to send adhesion fault information to the display screen. The adhesion fault information includes the fault type, fault node and fault operation method, and sends an audio-visual reminder command to the display screen of the construction machinery.

[0126] Fourth, after the maintenance personnel see the adhesion fault information displayed on the screen, they should manually disconnect the manual maintenance switch of the BMS according to the prompts.

[0127] Fifth, after the MCU reports that the DC bus voltage is less than 36V, the vehicle controller sends a command to the display screen to turn off the audible and visual alerts, and then sends a shutdown command to control the display screen to turn off. The vehicle controller enters sleep mode, and the high-voltage shutdown of the vehicle is complete. Maintenance personnel will see the display screen turn off, indicating that the high-voltage shutdown of the vehicle has been completed, and can then proceed with fault repairs on the electric excavator.

[0128] Figure 3 This is a schematic diagram of the structure of a vehicle controller according to an embodiment of this application, as shown below. Figure 3As shown, the vehicle controller includes: an acquisition module 31, used to acquire the power-down signal of the construction machinery and determine the power-down type of the construction machinery based on the power-down signal, the power-down type including normal power-down and abnormal power-down; and a processing module 32, used to execute normal power-down logic when the power-down type of the construction machinery is normal power-down, and control the display screen of the construction machinery to turn off after detecting that the vehicle is under high voltage; and to send an adhesion fault prompt message to the display screen of the construction machinery when the power-down type of the construction machinery is abnormal power-down, and control the display screen of the construction machinery to turn off after detecting that the vehicle is under high voltage.

[0129] The vehicle controller provided in this application embodiment can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar, and will not be repeated here.

[0130] Figure 4 This is a schematic diagram of the structure of a vehicle controller according to another embodiment of this application, as shown below. Figure 4 As shown, the vehicle controller includes a processor 401 and a memory 402 communicatively connected to the processor 401; the memory 402 stores computer execution instructions; the processor 401 executes the computer execution instructions stored in the memory 402 to implement the steps of the high-voltage electrical display control method for construction machinery in the above-described method embodiments.

[0131] In the aforementioned vehicle controller, the memory 402 and the processor 401 are electrically connected directly or indirectly to enable data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses or signal lines, such as a bus connection. The memory 402 stores computer-executable instructions for implementing data access control methods, including at least one software function module that can be stored in the memory 402 in the form of software or firmware. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402.

[0132] The memory 402 may be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 402 stores programs, which are executed by the processor 401 upon receiving execution instructions. Furthermore, the software programs and modules within the memory 402 may also include an operating system, which may include various software components and / or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.) and can communicate with various hardware or software components to provide an operating environment for other software components.

[0133] Processor 401 can be an integrated circuit chip with signal processing capabilities. The aforementioned processor 401 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor.

[0134] One embodiment of this application also provides an electric engineering machine, such as... Figure 1 As shown, the construction machinery may include: a motor controller, a battery management system, a high-voltage circuit, a display screen, and other components. Figure 4 The vehicle controller, motor controller, battery management system, and display screen shown are electrically connected to the vehicle controller.

[0135] The high-voltage circuit includes a main positive relay, an accessory relay, and a main negative relay. The main positive relay and the accessory relay are electrically connected to the motor controller, and the main negative relay is electrically connected to the battery management system.

[0136] An embodiment of this application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the steps of the various method embodiments of this application.

[0137] An embodiment of this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the various method embodiments of this application.

[0138] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0139] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0140] It should be understood that the above-described device embodiments are merely illustrative, and the device of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0141] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of this application can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0142] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0143] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0144] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A high-voltage power display control method for engineering machinery, characterized in that, include: Acquire the power-down signal of the construction machinery, and determine the power-down type of the construction machinery based on the power-down signal, wherein the power-down type includes normal power-down and abnormal power-down; When the power-down type of the construction machinery is normal power-down, the normal power-down logic is executed, and the display screen of the construction machinery is turned off after the high voltage of the whole vehicle is detected. When the power-down type of the construction machinery is abnormal power-down, an adhesion fault prompt message is sent to the display screen of the construction machinery, and the display screen of the construction machinery is turned off after the high voltage of the whole vehicle is detected.

2. The high-voltage power display control method for engineering machinery according to claim 1, characterized in that, The step of acquiring the power-down signal of the construction machinery and determining the power-down type of the construction machinery based on the power-down signal includes: Acquire the power-off signal of the construction machinery, the power-off signal including normal power-off signal and fault power-off signal; When the power-down signal is a normal power-down signal, the power-down type of the construction machinery is determined to be normal power-down; When the power-down signal is a fault power-down signal, determine whether the fault type corresponding to the fault power-down signal is a relay sticking fault; if it is not a relay sticking fault, determine that the power-down type of the construction machinery is normal power-down; if it is a relay sticking fault, determine that the power-down type of the construction machinery is abnormal power-down.

3. The high-voltage power display control method for engineering machinery according to claim 2, characterized in that, The fault types include relay sticking faults and vehicle operation faults; The relay sticking fault includes one or more of the following: main positive relay sticking, accessory relay sticking, and main negative relay sticking.

4. The high-voltage power display control method for engineering machinery according to claim 3, characterized in that, Determining whether the fault type corresponding to the faulty electrical signal is a relay sticking fault includes: A first relay disconnect command is sent to the motor controller of the construction machinery, and a second relay disconnect command is sent to the battery management system of the construction machinery. The first relay disconnect command is used to instruct the motor controller to disconnect the main positive relay and the accessory relay of the high voltage circuit, and the second relay disconnect command is used to instruct the battery management system to disconnect the main negative relay of the high voltage circuit. If no disconnection signal from the main positive relay or the auxiliary relay is received within a preset time period after sending the first relay disconnection command, or no disconnection signal from the main negative relay is received within a preset time period after sending the second relay disconnection command, then the fault type corresponding to the fault electrical signal is determined to be a relay sticking fault. If the disconnection signals of the main positive relay and the auxiliary relay are received within a preset time after the first relay disconnection command is sent, and the disconnection signal of the main negative relay is received within a preset time after the second relay disconnection command is sent, then it is determined that the fault type corresponding to the fault electrical signal is not a relay sticking fault.

5. The high-voltage electrical display control method for engineering machinery according to any one of claims 1-4, characterized in that, The execution of normal power-down logic, and the control of the display screen of the construction machinery to turn off after detecting that the vehicle is under high voltage, includes: A first relay disconnect command is sent to the motor controller of the construction machinery, and a second relay disconnect command is sent to the battery management system of the construction machinery. The first relay disconnect command is used to instruct the motor controller to disconnect the main positive relay and the accessory relay of the high voltage circuit, and the second relay disconnect command is used to instruct the battery management system to disconnect the main negative relay of the high voltage circuit. After a preset time, an active discharge command is sent to the motor controller; The DC bus voltage is obtained using the motor controller, and after detecting that the DC bus voltage is less than the preset safe voltage, the high voltage of the whole vehicle is determined, and a shutdown command is sent to the display screen of the construction machinery to control the display screen to turn off.

6. The high-voltage electrical display control method for engineering machinery according to any one of claims 1-4, characterized in that, Sending an adhesion fault warning message to the display screen of the construction machinery, and controlling the display screen of the construction machinery to turn off after detecting high pressure on the entire vehicle, includes: Send adhesion fault information to the display screen of the construction machinery. The adhesion fault information includes fault type, fault node and fault operation method. Send an audio-visual alert command to the display screen of the construction machinery, the audio-visual alert command being used to instruct the operator to handle the fault according to the adhesion fault information; The DC bus voltage is obtained using the motor controller, and after detecting that the DC bus voltage is less than the preset safe voltage, the high voltage of the whole vehicle is determined, and a shutdown command is sent to the display screen of the construction machinery to control the display screen to turn off.

7. The high-voltage power display control method for engineering machinery according to claim 6, characterized in that, The fault operation method includes any one of the following: Manually disconnect the manual maintenance switch of the battery management system; Manually disconnect the circuit breaker of the leakage protection cabinet.

8. A vehicle controller, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory is used to store computer-executed instructions; The processor is used to execute computer execution instructions stored in the memory, causing the processor to perform the high-voltage electrical display control method for engineering machinery as described in any one of claims 1-7.

9. An electric engineering machine, characterized in that, include: The system includes a motor controller, a battery management system, a high-voltage circuit, a display screen, and a vehicle controller as described in claim 8, wherein the motor controller, the battery management system, and the display screen are electrically connected to the vehicle controller. The high-voltage circuit includes a main positive relay, an accessory relay, and a main negative relay. The main positive relay and the accessory relay are electrically connected to the motor controller, and the main negative relay is electrically connected to the battery management system.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the high-voltage electrical display control method for engineering machinery as described in any one of claims 1-7.

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