Electric engineering vehicle and low-voltage on-off control method thereof

Abstract

The application provides an electric engineering vehicle and a low-voltage power-on and power-off control method thereof, and belongs to the field of electric engineering vehicles. The low-voltage power-on and power-off control method of the electric engineering vehicle in the application comprises the following steps: in the case of receiving a vehicle wake-up signal, waking up a vehicle controller and performing a self-check operation of the vehicle controller, and waking up a main control screen; in the case of no fault in the self-check operation of the vehicle controller, supplying power to a vehicle low-voltage relay, and performing a self-check operation on each control node after waking up the vehicle control nodes; comparing the self-check information of each control node with recorded comparison information of each control node, recording the control nodes with abnormalities as abnormal nodes, and outputting abnormal prompt information; wherein the comparison information of each control node is the working state information of each control node recorded when the electric engineering vehicle is powered on last time. The low-voltage power-on and power-off control method of the electric engineering vehicle is beneficial to improving the use quality of the electric engineering vehicle.

Description

Technical Field

[0001] This invention relates to the field of electric engineering vehicle technology, and particularly to a low-voltage power-on / off control method for electric engineering vehicles. This invention also relates to an electric engineering vehicle that utilizes the aforementioned low-voltage power-on / off control method. Background Technology

[0002] As a type of new energy engineering vehicle, the low-voltage power supply and de-energizing system of electric engineering vehicles is a core component ensuring the normal operation of the vehicle. Currently, in the field of electric engineering vehicles, taking electric excavators as an example, the low-voltage power supply and de-energizing process of electric excavators mainly includes self-check before vehicle start-up, power-on operation, and power-off operation. Among them, the self-check operation is a key step to ensure that all components of the vehicle are in normal working condition before start-up, which is directly related to the safety, reliability, and operating efficiency of the vehicle.

[0003] Currently, the low-voltage power-on / off self-test operation of electric excavators typically only performs a simple check on the basic operating status of various components, such as whether the battery is working properly, whether the motor controller is responding, and whether the communication module is functioning correctly. This self-test method can only determine whether a component is working, but it cannot deeply detect the health status of the components or potential problems. Because it cannot comprehensively detect the health status of each component, many potential problems are overlooked during the self-test process and are only discovered when a fault occurs, thus increasing the risk of failure during vehicle operation and hindering the improvement of the quality of electric engineering vehicles. Summary of the Invention

[0004] In view of this, the present invention aims to propose a low-voltage power-on and power-off control method for electric engineering vehicles, so as to improve the quality of use of electric engineering vehicles.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A method for controlling the low-voltage power-on / off of an electric engineering vehicle, wherein when the electric engineering vehicle is powered on at low voltage, the control method includes:

[0007] Upon receiving a vehicle wake-up signal, the vehicle controller is woken up, and the self-test operation of the vehicle controller is performed, as well as the main control screen is woken up.

[0008] If the vehicle controller has no faults during self-test, power is supplied to the vehicle's low-voltage relay, and after waking up each control node of the vehicle, a self-test operation is performed on each of the vehicle's control nodes.

[0009] The self-test information of each control node of the whole vehicle is compared with the recorded comparison information of each control node. The control node whose self-test information and the corresponding comparison information do not meet the preset requirements is recorded as an abnormal node, and the corresponding abnormal prompt information is output on the main control screen.

[0010] The comparison information for each control node is the recorded working status information of each control node when the electric engineering vehicle was powered on for the last time at low voltage.

[0011] Furthermore, after comparing the self-test information of each control node of the vehicle with the recorded comparison information of each control node, the control method includes: when the self-test information of each control node of the vehicle and the recorded comparison information of each control node both meet the preset requirements, the low-voltage power-on operation of the electric engineering vehicle is completed.

[0012] Furthermore, the vehicle wake-up signal is one of the following: a charging gun connection signal, a key control signal, or a vehicle network remote wake-up signal.

[0013] Furthermore, the wake-up of the main control screen includes: the vehicle controller sending a power-on command to the main control screen, and performing self-test and initialization operations on the main control screen after it is powered on; if the main control screen performs self-test and initialization without faults, the main control screen starts up.

[0014] Furthermore, when the electric engineering vehicle is powered down at low voltage, the control method includes: the vehicle controller sending a sleep command to each of the vehicle's control nodes and sending a power-down command to the main control screen; each of the vehicle's control nodes entering a sleep state, the main control screen being powered down, and the low-voltage power-down operation being completed after the vehicle controller enters a sleep state.

[0015] Furthermore, the power-down process of the main control screen includes: upon receiving the power-down command, saving the current state and settings of the main control screen and shutting down each functional module of the main control screen; after the current state and settings of the main control screen are saved and each functional module of the main control screen is shut down, disconnecting the power supply of the main control screen to complete the power-down of the main control screen.

[0016] Furthermore, when the electric engineering vehicle is powered on at low voltage, the vehicle controller is awakened and wakes up each high-voltage component of the electric engineering vehicle through network management commands; when the electric engineering vehicle is powered off at low voltage, the on / off status of each high-voltage component is detected, and the low-voltage power-off operation of the electric engineering vehicle is performed when all the high-voltage components are disconnected.

[0017] Furthermore, the preset requirement includes that the difference between the self-test information and the corresponding comparison information of each control node is below a set threshold.

[0018] Furthermore, the comparison information includes at least one of the power-on response time, power-off response time, voltage, and current of each control node.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The low-voltage power-on / off control method for electric engineering vehicles described in this invention records the working status information of each control node during the previous low-voltage power-on as comparison information. During the current low-voltage power-on, this comparison information is compared with the self-test information of each control node. If the self-test information and the comparison information do not meet preset requirements, an anomaly warning is issued. This allows for early detection of anomalies in each control node before malfunctions occur, facilitating maintenance of each control node before failures occur, preventing malfunctions during operation, and ultimately improving the overall performance of the electric engineering vehicle.

[0021] Furthermore, ensuring that the low-voltage power-on operation is completed only after the self-check information and comparison information of each control node meet the preset requirements facilitates normal vehicle operation and design implementation. Making the vehicle wake-up signal one of three options—charging gun connection signal, key control signal, or vehicle network remote wake-up signal—facilitates adaptation to various low-voltage power-on / off control scenarios, further facilitating design implementation. Performing self-check and initialization operations on the main control screen before waking it up ensures its normal operation, facilitates troubleshooting, and aids in design implementation. By shutting down the main control screen before powering down the entire vehicle, the normal operation of the main control screen is ensured, avoiding malfunctions caused by sudden power outages or insufficient power supply, thus facilitating design implementation.

[0022] Furthermore, by saving the current state and settings of the main control panel before powering it down, and completing the power-down process only after all functional modules are shut down, the system and data security during the main control panel power-down process are improved, better preventing system crashes and data loss, thus facilitating design and implementation. By waking up the vehicle controller before waking up each high-voltage component during low-voltage power-up of the electric engineering vehicle, the safety of waking up each high-voltage component is improved, ensuring the overall vehicle's operational safety. By disconnecting and detecting the disconnection status of each high-voltage component before completing the low-voltage power-down process, the safety hazards caused by residual voltage are eliminated, facilitating design and implementation. By setting preset thresholds and ensuring that the difference between self-test information and comparison information is below the set thresholds, the normal operation of each control node is ensured, and anomalies of each control node are monitored, facilitating design and implementation. Ensuring that the comparison information includes at least one of the following for each control node: power-on response time, power-off response time, voltage, and current, allows for the identification of faults and anomalies in each control node through comparison of response time, voltage, and current, thus facilitating design and implementation.

[0023] The present invention also proposes an electric engineering vehicle, wherein the control system of the electric engineering vehicle is provided with a memory and a processor; the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the low-voltage power-on and power-off control method of the electric engineering vehicle as described above is realized.

[0024] The electric engineering vehicle described in this invention and the low-voltage power-on / off control method for the electric engineering vehicle described above have the same beneficial effects as the prior art, so they will not be repeated here. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 This is a flowchart of the low-voltage power-on / off control method for electric engineering vehicles according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the control system of the electric engineering vehicle according to an embodiment of the present invention;

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Control system; 101. Memory; 102. Processor. Detailed Implementation

[0030] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0031] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0032] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0034] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] This embodiment relates to a low-voltage power-on / off control method for electric engineering vehicles, aiming to improve the quality of vehicle use by optimizing the steps of low-voltage power-on / off control.

[0039] Before providing an overall introduction to the low-voltage power-on / off control method for the electric engineering vehicle in this embodiment, it is necessary to briefly introduce the relevant concepts involved. The electric engineering vehicle in this embodiment can be, for example, an electric excavator. The vehicle controller in this embodiment is the VCU (Vehicle Control Unit) in the electric engineering vehicle, and the control nodes are the relevant low-voltage components involved when the electric engineering vehicle is powered on and off.

[0040] In terms of overall concept, such as Figure 1 As shown, the low-voltage power-on / off control method for the electric engineering vehicle in this embodiment includes the following steps when the electric engineering vehicle is powered on at low voltage:

[0041] Step S1: Upon receiving the vehicle wake-up signal, wake up the vehicle controller, perform the self-test operation of the vehicle controller, and wake up the main control screen.

[0042] In step S1, the vehicle wake-up signal is one of the following: a charging gun connection signal, a key control signal, or a vehicle network remote wake-up signal. This ensures the vehicle wake-up signal is compatible with various low-voltage power-on / off control scenarios, facilitating design and implementation. The specific steps of the vehicle controller's self-test operation can be found in existing vehicle controller self-test operations, and will not be repeated in this embodiment. When waking up the main control screen, step S1 also includes the following steps:

[0043] Step S11: The vehicle controller sends a power-on command to the main control screen and performs self-test and initialization operations on the main control screen after it is powered on.

[0044] In step S11, after receiving the power-on command, the main control screen connects to the power supply and performs a self-test and initialization operation. The specific steps of the self-test and initialization operations of the main control screen can be referred to in the prior art, and will not be described in detail in this embodiment.

[0045] Step S12: If the main control screen is fault-free during self-test and initialization, the main control screen will start.

[0046] In step S12, the main control screen is started without faults, which helps to ensure the normal use of the main control screen.

[0047] In steps S11 and S12, performing self-test and initialization operations on the main control screen before waking it up helps ensure the normal use of the main control screen, facilitates troubleshooting, and aids in design and implementation.

[0048] Step S2: If the vehicle controller has no faults during self-test, power is supplied to the vehicle's low-voltage relays, and after waking up each control node of the vehicle, self-test operations are performed on each control node of the vehicle.

[0049] In step S2, when the vehicle controller has no faults during self-test, the vehicle controller enters the working state, and the power supply supplies power to the vehicle's low-voltage relay to wake up each control node of the vehicle. This is to ensure that the preset wake-up sequence in the vehicle controller can be executed smoothly and that each control node is woken up.

[0050] Step S3: Compare the self-test information of each control node of the vehicle with the recorded comparison information of each control node. Record the control nodes whose self-test information and corresponding comparison information do not meet the preset requirements as abnormal nodes, and output the corresponding abnormal prompt information on the main control screen.

[0051] In step S3, the comparison information for each control node is the recorded operating status information of each control node during the last low-voltage power-on of the electric engineering vehicle. Preset requirements include that the difference between the self-test information and the corresponding comparison information of each control node is below a set threshold. By setting a threshold and ensuring that the difference between the self-test information and the comparison information is below the set threshold, it is beneficial to ensure the normal operation of each control node and monitor its abnormalities, which is helpful for design and implementation. The comparison information includes at least one of the following for each control node: power-on response time, power-off response time, voltage, and current. This allows for the identification of faults and abnormalities in each control node through comparison of response time, voltage, and current, thus facilitating design and implementation.

[0052] It is worth mentioning that, in this embodiment, when the electric engineering vehicle is powered on for the first time, no self-test information or comparison information is performed. Only the operating status information of each control node is recorded for comparison with the self-test information during the next power-on. The power-on response time and power-off response time of each control node are acquired as the time interval from when the control node receives the wake-up command to when it completes power-on, and the power-off response time is the time interval from when the control node receives the sleep command to when it completes power-off. The voltage and current of each control node are acquired through preset sensors within the electric engineering vehicle. Of course, the comparison information may also include other operating status information of each control node.

[0053] In this embodiment, the low-voltage power-on / off control method for electric engineering vehicles records the working status information of each control node during the previous low-voltage power-on as comparison information when the electric engineering vehicle is powered on at low voltage. During the current low-voltage power-on, the comparison information is compared with the self-test information of each control node. When the self-test information and the comparison information do not meet the preset requirements, abnormal prompts are issued. This allows for the notification of abnormalities in each control node before a failure occurs, facilitating maintenance of each control node before failure occurs, preventing malfunctions during operation, and improving the overall quality of use of the electric engineering vehicle.

[0054] After comparing the self-test information of each control node of the vehicle with the recorded comparison information of each control node, the low-voltage power-on / off control method for electric engineering vehicles in this embodiment further includes:

[0055] Step S4: If the self-test information of each control node of the vehicle meets the preset requirements and the comparison information of each control node recorded, complete the low-voltage power-on operation of the electric engineering vehicle.

[0056] In step S4, if the self-test information and comparison information of each control node meet the preset requirements, the low-voltage power-on operation is completed, which is conducive to ensuring the normal use of the vehicle and to the design and implementation.

[0057] Furthermore, the low-voltage power-on / off control method for the electric engineering vehicle in this embodiment includes the following control method when performing low-voltage power-off:

[0058] Step S5: The vehicle controller sends a hibernation command to each control node of the vehicle and sends a power-down command to the main control screen.

[0059] In step S5, the hibernation command is a preset command within the vehicle controller to put each control node of the vehicle into hibernation, and the power-down command sent to the main control screen is a preset command within the vehicle controller to power down the main control screen.

[0060] Step S6: All control nodes of the vehicle enter sleep mode, the main control screen is powered down, and the low-voltage power-off operation is completed after the vehicle controller enters sleep mode.

[0061] In step S6, shutting down the main control screen before powering down the entire vehicle helps ensure the normal operation of the main control screen, avoiding malfunctions caused by sudden power outages or insufficient power supply, and facilitating design and implementation. Furthermore, step S6, when powering down the main control screen, also includes the following steps:

[0062] Step S61: Upon receiving the power-down command, save the current state and settings of the main control screen and close all functional modules of the main control screen.

[0063] In step S61, when the main control screen receives a power-down command, it stores and records the current working status and settings of the main control screen, and after storing and recording, it shuts down all functional modules of the main control screen.

[0064] Step S62: After the current state and settings of the main control screen are saved and all functional modules of the main control screen are turned off, disconnect the power supply of the main control screen to complete the power-off of the main control screen.

[0065] In step S62, by saving the current state and settings of the main control screen before powering it down, and completing the power-down of the main control screen after all functional modules are turned off, the system security and data security during the power-down process of the main control screen are improved, which helps to better avoid system crashes and data loss, and facilitates design and implementation.

[0066] Furthermore, in this embodiment, the low-voltage power-on / off control method for the electric engineering vehicle involves waking up the vehicle controller during low-voltage power-on and then waking up the high-voltage components of the electric engineering vehicle via network management commands. During low-voltage power-off, the on / off status of each high-voltage component is detected, and the low-voltage power-off operation is performed only when all high-voltage components are disconnected. By waking up the vehicle controller first during low-voltage power-on and then waking up the high-voltage components, the safety of waking up the high-voltage components is improved, which helps ensure the overall safety of the vehicle. By disconnecting and detecting the disconnection status of each high-voltage component before completing the low-voltage power-off process, the safety hazards caused by residual voltage are eliminated, facilitating design and implementation.

[0067] In practical application, taking an electric excavator as an example, the low-voltage power-on control method for electric engineering vehicles in this embodiment begins the low-voltage power-on operation after receiving the key control signal. This wakes up the vehicle controller of the electric excavator, performs a self-test operation, and wakes up the main control screen. If the vehicle controller fails a self-test, a prompt is displayed on the main control screen for the driver to handle. If the vehicle controller passes the self-test without fault, it wakes up each control node of the vehicle and performs a self-test operation on each node. During the self-test operation of each control node, the self-test information is compared with the comparison information. If any control node does not meet the preset requirements, the control node is recorded as an abnormal node, and an abnormal message is displayed on the main control screen for the driver to handle. When all control nodes meet the preset requirements, the low-voltage power-on operation of the electric excavator is completed. During the low-voltage power-down operation, the vehicle controller sends a sleep command to each control node and a power-down command to the main control screen. After saving the current state and settings of the main control screen, the main control screen is turned off, and the low-voltage power-down operation of the electric excavator is completed after the vehicle controller goes into sleep mode.

[0068] The low-voltage power-on / off control method for electric engineering vehicles in this embodiment compares the comparison information of each control node recorded after the previous power-on with the self-test information of each control node during the self-test operation during the current power-on. When a control node fails to meet the preset requirements, the problematic control node is recorded as an abnormal node and displayed on the main control screen. This helps the driver to detect abnormal nodes in advance before they malfunction, maintain each control node, avoid malfunctions during operation, and improve the quality of vehicle use.

[0069] Example 2

[0070] This embodiment relates to an electric engineering vehicle. The control system 10 of the electric engineering vehicle in this embodiment is provided with a memory 101 and a processor 102. The memory 101 stores computer-readable instructions. When the computer-readable instructions are executed by the processor 102, the low-voltage power-on and power-off control method of the electric engineering vehicle in Embodiment 1 is implemented.

[0071] It should be noted that the electric engineering vehicle in this embodiment can be, for example, an electric excavator, and the aforementioned memory and processor can both be existing circuit modules with data storage, processing, and input / output capabilities. In addition to the aforementioned memory and processor, the control system will typically also include other modules such as data storage and data communication modules to temporarily store relevant data and other related processing information, and to establish connections and communication with other related modules.

[0072] The control system of this embodiment, when used in specific applications, can be referred to the relevant description in Embodiment 1.

[0073] Furthermore, the electric engineering vehicle in this embodiment controls the low-voltage power-on and power-off of the electric engineering vehicle through the control method in Embodiment 1. When the electric engineering vehicle is powered on at low voltage, the working status information of each control node during the previous low-voltage power-on is recorded as comparison information. During the current low-voltage power-on, the comparison information is compared with the self-test information of each control node. When the self-test information and the comparison information do not meet the preset requirements, abnormal prompt information is provided. This allows for the prompting of abnormalities in each control node before a fault occurs, which helps to maintain each control node before a fault occurs, avoids faults during operation, and improves the quality of vehicle use.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the low-voltage power supply and de-energization of an electric engineering vehicle, characterized in that, When the electric engineering vehicle is powered on at low voltage, the control method includes: Upon receiving a vehicle wake-up signal, the vehicle controller is woken up, and the self-test operation of the vehicle controller is performed, as well as the main control screen is woken up. If the vehicle controller has no faults during self-test, power is supplied to the vehicle's low-voltage relay, and after waking up each control node of the vehicle, a self-test operation is performed on each of the vehicle's control nodes. The self-test information of each control node of the whole vehicle is compared with the recorded comparison information of each control node. The control node whose self-test information and the corresponding comparison information do not meet the preset requirements is recorded as an abnormal node, and the corresponding abnormal prompt information is output on the main control screen. The comparison information for each control node is the recorded working status information of each control node when the electric engineering vehicle was powered on for the last time at low voltage.

2. The low-voltage power-on / off control method for electric engineering vehicles according to claim 1, characterized in that, After comparing the self-test information of each control node of the vehicle with the recorded comparison information of each control node, the control method includes: When the self-test information of each control node of the vehicle meets the preset requirements and the comparison information of each control node recorded, the low-voltage power-on operation of the electric engineering vehicle is completed.

3. The low-voltage power-on / off control method for electric engineering vehicles according to claim 1, characterized in that: The vehicle wake-up signal is one of the following: charging gun connection signal, key control signal, or vehicle network remote wake-up signal.

4. The low-voltage power-on / off control method for electric engineering vehicles according to claim 1, characterized in that, The wake-up of the main control screen includes: The vehicle controller sends a power-on command to the main control screen, and performs self-test and initialization operations on the main control screen after it is powered on. If the main control screen performs a self-test and initializes without any faults, the main control screen will start.

5. The low-voltage power-on / off control method for electric engineering vehicles according to claim 1, characterized in that, When the electric engineering vehicle is powered down at low voltage, the control method includes: The vehicle controller sends a sleep command to each of the control nodes of the vehicle and sends a power-off command to the main control screen. All control nodes of the vehicle enter a sleep state, the main control screen is powered down, and the low-voltage power-down operation is completed after the vehicle controller enters a sleep state.

6. The low-voltage power-on / off control method for electric engineering vehicles according to claim 5, characterized in that, The power-down process of the main control screen includes: Upon receiving the power-down command, the current state and settings of the main control screen are saved, and all functional modules of the main control screen are turned off. After the current state and settings of the main control screen are saved and all functional modules of the main control screen are turned off, the power supply of the main control screen is disconnected to complete the power-off of the main control screen.

7. The low-voltage power-on / off control method for electric engineering vehicles according to claim 5, characterized in that: When the electric engineering vehicle is powered on at low voltage, the vehicle controller is awakened and then wakes up the high-voltage components of the electric engineering vehicle through network management commands. When the electric engineering vehicle is powered down at low voltage, the on / off status of each of the high-voltage components is detected, and the low-voltage power-down operation of the electric engineering vehicle is performed when all the high-voltage components are disconnected.

8. The low-voltage power-on / off control method for electric engineering vehicles according to any one of claims 1-7, characterized in that: The preset requirement includes that the difference between the self-test information and the corresponding comparison information of each control node is below a set threshold.

9. The low-voltage power-on / off control method for electric engineering vehicles according to claim 8, characterized in that: The comparison information includes at least one of the following for each control node: power-on response time, power-off response time, voltage, and current.

10. An electric engineering vehicle, characterized in that: The control system of the electric engineering vehicle is equipped with a memory and a processor; The memory stores computer-readable instructions, which, when executed by the processor, implement the low-voltage power-on / off control method for electric engineering vehicles as described in any one of claims 1-9.

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