Power-on Method, System and Working Machine of Electric Working Machine

Abstract

The present invention provides a power-on method, system and working machine for an electric working machine, relating to the technical field of power-on control of working machines. The method includes: after obtaining a signal indicating high voltage on the whole vehicle, putting the electric working machine in a high-voltage mode; obtaining a charging connection state signal and a whole vehicle working state signal; based on the charging connection state signal and the whole vehicle working state signal, adjusting the electric working machine from the high-voltage mode to a corresponding power-on mode; and powering on the electric working machine based on the power-on mode. This method is used to solve the defect in the prior art that when designing an electric working machine capable of working with a plugged-in gun, only the connection relationship between power supply and load is considered, without considering how to achieve power supply control, resulting in difficulties in developing an electric working machine with a plugged-in gun working mode, realizing automatic power supply control of the electric working machine, and meeting the intelligent triggering of multiple power-on modes of the electric working machine.

Description

Technical Field

[0001] The present invention relates to the technical field of power-on control of working machinery, and particularly to a power-on method, system and working machinery for an electric working machinery. Background Art

[0002] The electric working machinery uses a battery as a power source, and an on-vehicle charger OBC is used as a charger to charge the battery. Limited by the space limitation of the working machinery, the power that can be arranged on the whole vehicle is small. The endurance time of the whole vehicle is limited, and the endurance time of working while powered is generally 4 to 6 hours. Improving the working duration of the whole vehicle is a pain point of the electric working machinery. The best solution to this problem is to develop an electric working machinery with a plug-in gun working mode, that is, when an external power source is connected to the OBC through a charging gun, the external power source provides power supply for the working of the working machinery and charges the power battery of the working machinery at the same time, so as to ensure the endurance.

[0003] However, the current technical solutions that can implement the plug-in gun working mode only disclose the connection relationships of the OBC, the power battery, and the load equipment of the working machinery, etc., and rarely mention how to realize the power supply control of the power battery and the external power source when the electric working machinery is connected or not connected to an external power source, so that the actual development of the electric working machinery with a plug-in gun working mode still has great difficulties. Summary of the Invention

[0004] The present invention provides a power-on method, system and working machinery for an electric working machinery, which are used to solve the defect that in the prior art, when designing an electric working machinery capable of working with a plug-in gun, only the connection relationship between power supply and load is considered, and how to realize power supply control is not considered, resulting in difficulties in developing an electric working machinery with a plug-in gun working mode, and realizing automatic power supply control of the electric working machinery and meeting the intelligent trigger of multiple power-on modes of the electric working machinery.

[0005] The present invention provides a power-on method for an electric working machinery, including:

[0006] After obtaining a signal indicating high voltage on the whole vehicle, putting the electric working machinery into a high-voltage mode;

[0007] Obtaining a charging connection status signal and a whole vehicle working status signal;

[0008] Based on the charging connection status signal and the whole vehicle working status signal, adjusting the electric working machinery from the high-voltage mode to a corresponding power-on mode;

[0009] Powering on the electric working machinery based on the power-on mode.

[0010] According to the power-on method of the electric working machine of the present invention, the charging connection status signal includes a charging connection valid signal and a charging connection invalid signal; the vehicle working status signal includes a vehicle working signal and a vehicle standby signal;

[0011] Based on the charging connection status signal and the vehicle working status signal, adjusting the electric working machine from the high-voltage mode to the corresponding power-on mode includes:

[0012] Based on the charging connection valid signal and the vehicle working signal, adjusting the electric working machine from the high-voltage mode to the plug-in gun working mode;

[0013] Based on the charging connection valid signal and the vehicle standby signal, adjusting the electric working machine from the high-voltage mode to the charging mode;

[0014] Based on the charging connection invalid signal and the vehicle working signal, adjusting the electric working machine from the high-voltage mode to the pure electric working mode.

[0015] According to the power-on method of the electric working machine of the present invention, powering on the electric working machine based on the power-on mode includes:

[0016] Based on the plug-in gun working mode, powering on the electric working machine;

[0017] The powering on the electric working machine based on the plug-in gun working mode includes:

[0018] Sending a charging request to the battery management system of the electric working machine;

[0019] Sending the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, a charging current limit value, and a charging prohibition signal;

[0020] After receiving the charging instruction execution signal by the on-vehicle charger, sending a vehicle working request to the micro control unit of the electric working machine;

[0021] Obtaining a first execution signal by the micro control unit; the first execution signal is a signal sent by the micro control unit after driving the motor of the electric working machine to act under the power supply of the on-vehicle charger.

[0022] According to the power-on method of the electric working machine of the present invention, the sending the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine includes:

[0023] Send the charge permission signal, the maximum charging voltage, and the charging current limit value received by the battery management system to the on-vehicle charger of the electric work machine; the charge permission signal is generated when the remaining power of the battery connected to the on-vehicle charger is less than the upper limit of the predetermined threshold, or when the remaining power is less than the lower limit of the predetermined threshold.

[0024] Send the charge prohibition signal received by the battery management system to the on-vehicle charger of the electric work machine; the charge prohibition signal is generated when the remaining power is greater than or equal to the upper limit of the predetermined threshold.

[0025] According to the power-on method of the electric work machine of the present invention, powering on the electric work machine based on the determined power-on mode includes:

[0026] Power on the electric work machine based on the charging mode;

[0027] The powering on the electric work machine based on the charging mode includes:

[0028] Send a charging request to the battery management system of the electric work machine;

[0029] Send the charging instruction received by the battery management system to the on-vehicle charger of the electric work machine; the charging instruction includes: a charge permission signal, a maximum charging voltage, and a charging current limit value;

[0030] The on-vehicle charger obtains a second execution signal; the second execution signal is a signal sent when the on-vehicle charger charges the power battery of the electric work machine.

[0031] According to the power-on method of the electric work machine of the present invention, powering on the electric work machine based on the determined power-on mode includes:

[0032] Power on the electric work machine based on the pure electric working mode;

[0033] The powering on the electric work machine based on the pure electric working mode includes:

[0034] Send a vehicle-wide work request to the micro control unit of the electric work machine;

[0035] The micro control unit obtains a third execution signal; the third execution signal is a signal sent after the micro control unit drives the motor of the electric work machine to act under the power supply of the power battery of the electric work machine.

[0036] The present invention also provides a power-on system for an electric work machine, including a vehicle-wide controller of the electric work machine;

[0037] After obtaining a signal indicating that high voltage is applied to the whole vehicle, the whole vehicle controller enables the electric working machine to be in a high-voltage mode; obtains a charging connection status signal and a whole vehicle working status signal; based on the charging connection status signal and the whole vehicle working status signal, adjusts the electric working machine from the high-voltage mode to a corresponding power-on mode; and powers on the electric working machine based on the power-on mode.

[0038] In the power-on system of the electric working machine according to the present invention, the charging connection status signal obtained by the whole vehicle controller includes: a charging connection valid signal and a charging connection invalid signal; the whole vehicle working status signal includes: a whole vehicle working signal and a whole vehicle standby signal;

[0039] The power-on system of the electric working machine further includes: a starting button of the electric working machine and an on-vehicle charger;

[0040] The starting button is used for sending the high-voltage signal applied to the whole vehicle to the whole vehicle controller after being pressed for a preset first duration, and sending the whole vehicle working signal to the whole vehicle controller after being pressed for a preset second duration;

[0041] The on-vehicle charger is used for sending the charging connection valid signal to the whole vehicle controller after being correctly connected to a charging gun, and sending the charging connection invalid signal to the whole vehicle controller when not connected to the charging gun or having a poor connection.

[0042] In the power-on system of the electric working machine according to the present invention, the whole vehicle controller is further used for generating the whole vehicle standby signal when the whole vehicle working signal is not received within a preset third duration after receiving the high-voltage signal applied to the whole vehicle.

[0043] The present invention further provides a working machine including the power-on system of the electric working machine as described in any one of the above.

[0044] The present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor executes the program, it implements the power-on method of the electric working machine as described in any one of the above.

[0045] The present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the power-on method of the electric working machine as described in any one of the above.

[0046] An electrification method, system and working machine for an electric working machine provided by the present invention, after obtaining a signal indicating high voltage on the whole vehicle, put the electric working machine in a high-voltage mode, obtain a charging connection status signal and a whole vehicle working status signal, and then adjust the electric working machine from the high-voltage mode to a corresponding electrification mode based on the charging connection status signal and the whole vehicle working status signal, and finally electrify the electric working machine based on the electrification mode, realizing the automatic selection of the electrification mode of the electric working machine, that is, meeting the intelligent control of multiple electrification modes of the electric working machine, making the use of the electric working machine more convenient, solving the problem of limited endurance time caused by the power supply of the power battery of the electric working machine, and making it possible to actually develop an electric working machine with automatic confirmation of the electrification mode and control of electrification. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0048] Figure 1 is a schematic flowchart of an electrification method for an electric working machine provided by the present invention;

[0049] Figure 2 is a schematic flowchart of the electrification process in the gun-insertion working mode provided by the present invention;

[0050] Figure 3 is a schematic flowchart of the electrification process in the charging mode provided by the present invention;

[0051] Figure 4 is a schematic flowchart of the electrification process in the pure-electric working mode provided by the present invention;

[0052] Figure 5 is a schematic structural diagram of an electrification system for an electric working machine provided by the present invention;

[0053] Figure 6 is a schematic structural diagram of an electronic control system of an electric excavator applying the electrification system for an electric working machine provided by the present invention;

[0054] Figure 7 is a schematic structural diagram of an electronic device provided by the present invention;

[0055] Reference numerals:

[0056] 1: Power grid; 2: Circuit breaker; 3: Charging gun; 4: OBC; 5: BMS and power battery; 6: MCU; 7: Motor; 8: One - key start button; 9: VCU; 10: Hydraulic pump; 11: Hydraulic system. Detailed implementation manners

[0057] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0058] It should be noted that the preferred way to solve the problem of limited endurance time of the whole electric working machine is to develop an electric working machine with a plug - in gun working mode. However, the current technical solutions that can achieve the plug - in gun working mode only illustrate the connection relationships of OBC, power battery and the load equipment of the working machine, etc. There is little mention of how to enable the electric working machine to automatically select the power - on mode according to different power supply situations and perform power - on control according to the selected power - on mode. Therefore, there is still great difficulty in the actual development of an electric working machine with automatic confirmation of the power - on mode and power - on control.

[0059] Based on this, the embodiments of the present invention propose a power - on method for an electric working machine. After the electric working machine is in the high - voltage mode, the power - on mode is selected based on the obtained charging connection status signal and the whole - vehicle working status signal, and then the electric working machine is controlled to power on according to the selected power - on mode, realizing the automatic selection and power - on control of the power - on mode of the electric working machine without adding additional control components. The control method is simple and easy to implement, making it possible to develop an electric working machine with automatic confirmation of the power - on mode and power - on control.

[0060] Meanwhile, for the convenience of understanding the technical solutions of the present invention, the nouns mentioned in the following embodiments are first explained:

[0061] VCU: Vehicle control unit, used for the strategy management and signal relay of the three - electric components of the whole vehicle, etc.

[0062] OBC: On - board charger, used to convert the three - phase alternating current of the power grid into direct current to charge the battery.

[0063] BMS: Battery management system, used for the management of the power battery.

[0064] MCU: Micro - control unit, a bridge - type conversion circuit composed of IGBT or MOSFET, used to control the rotational speed and torque of the motor output.

[0065] The following will describe Figures 1 to 4 a power-on method for an electric working machine of the present invention, which is executed by the vehicle control unit VCU of the electric working machine or a combination of its software and / or hardware, as Figure 1 shown, the method includes the following steps:

[0066] 101. After obtaining a signal indicating that the vehicle is powered on at high voltage, put the electric working machine in the high-voltage mode;

[0067] It can be understood that after the electric working machine receives the signal that the vehicle is powered on at high voltage, the VCU should first control the electric working machine to be powered on at high voltage, that is, put the electric working machine in the high-voltage mode. After the high-voltage power-on is completed, subsequent operations can be performed on the electric working machine.

[0068] Specifically, for an electric working machine controlled by a key, the signal that the vehicle is powered on at high voltage obtained by the VCU is generally obtained by turning the key after it is inserted into the keyhole. For an electric working machine controlled by a one-key start button, it is obtained when the one-key start button is pressed for the first time when the electric working machine is powered off.

[0069] More specifically, after being in the high-voltage mode, each control component of the electric working machine receives power supply and can work normally.

[0070] 102. Obtain a charging connection status signal and a vehicle working status signal;

[0071] It should be noted that the electric working machine is connected to the charging pile through the charging gun inserted into the OBC to achieve charging. After the charging gun is inserted into the OBC, the mechanical lock on the gun head and the gun seat of the OBC will confirm whether the charging gun is connected in place through the resistance between the alternating current and the ground wire of the charging pile. And the OBC will generate a charging connection signal CC after confirmation. Similarly, when the confirmation is not obtained, the OBC will also generate a signal indicating that the charging is not connected or not connected in place.

[0072] Furthermore, when the electric working machine is in the high-voltage mode, turning the key or pressing the one-key start button again will put the electric working machine in the working state, that is, make the electric working machine in the formal start state and be able to perform corresponding operations such as walking and upper body actions.

[0073] Based on this, the VCU can obtain the charging connection status signal from the OBC, and can obtain the vehicle working status signal by turning the keyhole again or pressing the one-key start button again.

[0074] 103. Based on the charging connection status signal and the vehicle working status signal, adjust the electric working machine from the high-voltage mode to the corresponding power-on mode;

[0075] Specifically, based on the obtained charging connection status signal and the vehicle working status signal, the VCU can determine the specific status of the vehicle, that is, whether the charging pile is connected, whether it is in the working state or the standby state, etc. Furthermore, according to these statuses, an appropriate power-on mode can be accurately determined for the electric working machine, that is, adjusting the electric working machine from the high-voltage mode to the corresponding power-on mode, so as to realize the automatic selection and switching of the power-on mode of the electric working machine based on the VCU.

[0076] 104. Power on the electric working machine based on the power-on mode.

[0077] Specifically, based on the charging connection status signal and the vehicle working status signal, the electric working machine is adjusted from the high-voltage mode to the corresponding power-on mode, and finally, based on the power-on mode, the electric working machine is powered on, so as to realize the automatic selection and control of the power-on mode of the electric working machine based on the VCU of the electric working machine. The control method is simple and easy to implement, making it possible to develop an electric working machine with automatic confirmation of the power-on mode and control of power-on.

[0078] As an embodiment of the present invention, the charging connection status signal includes a charging connection valid signal and a charging connection invalid signal; the vehicle working status signal includes a vehicle working signal and a vehicle standby signal;

[0079] The adjustment of the electric working machine from the high-voltage mode to the corresponding power-on mode based on the charging connection status signal and the vehicle working status signal includes:

[0080] Based on the charging connection valid signal and the vehicle working signal, the electric working machine is adjusted from the high-voltage mode to the plug-in gun working mode;

[0081] Based on the charging connection valid signal and the vehicle standby signal, the electric working machine is adjusted from the high-voltage mode to the charging mode;

[0082] Based on the charging connection invalid signal and the vehicle working signal, the electric working machine is adjusted from the high-voltage mode to the pure electric working mode.

[0083] Specifically, based on the charging connection state and the vehicle working state of the electric working machine, the power-on mode is divided into three types: the charging gun working mode, the charging mode, and the pure electric working mode. That is, when a charging gun is effectively connected to the OBC and the vehicle is in the working state, the charging gun working mode is adopted, in which the electric working machine is powered by an external power source and the power battery of the electric working machine is charged at the same time; when the charging gun is effectively connected to the OBC and the vehicle is in the standby state, the charging mode is adopted, in which the power battery is charged based on the external power source; and when the charging gun is ineffectively connected or not connected to the OBC and the vehicle is in the working state, the pure electric working mode is adopted, in which the electric working machine is powered by the power battery.

[0084] More specifically, taking the start mode of the electric working machine as the one-key start mode, the vehicle of the electric working machine can determine the power-on mode of the vehicle according to a short press (such as 0.5 seconds, 1 second, etc.) of the one-key start, the charging connection signal CC, and a long press (such as 2 seconds, 3 seconds, etc.) of the one-key start, as shown in Table 1:

[0085] Table 1 Power-on mode correspondence table

[0086]

[0087]

[0088] As can be seen from Table 1, when the short press of the one-key start is effective, the charging connection signal CC is ineffective, and the long press of the one-key start is effective, the vehicle is in the pure electric working mode.

[0089] When the short press of the one-key start is effective, the charging connection signal CC is effective, and the long press of the one-key start is effective, the vehicle is in the charging gun working mode.

[0090] When the short press of the one-key start is effective, the charging connection signal CC is effective, and the long press of the one-key start is ineffective, the vehicle is in the charging mode.

[0091] As an embodiment of the present invention, powering on the electric working machine based on the power-on mode includes:

[0092] Powering on the electric working machine based on the charging gun working mode;

[0093] Powering on the electric working machine based on the charging gun working mode includes:

[0094] Sending a charging request to the battery management system of the electric working machine;

[0095] Send the received charging instruction from the battery management system to the on-vehicle charger of the electric working machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, a charging current limit value, and a charging prohibition signal;

[0096] After receiving the charging instruction execution signal by the on-vehicle charger, send a vehicle-wide operation request to the micro control unit of the electric working machine;

[0097] Obtain a first execution signal by the micro control unit; the first execution signal is a signal sent after the micro control unit drives the motor of the electric working machine to operate under the power supply of the on-vehicle charger.

[0098] Specifically, the gun-insertion working mode of the electric working machine can be completely controlled and executed based on the components of the electric working machine.

[0099] It can be understood that the battery does not need to be charged when it is fully charged. Therefore, in the gun-insertion working mode, when the BMS receives a charging request, it will first detect the battery power. When the battery does not need to be charged, there is no need to feedback a charging permission signal to the VCU, but instead a charging prohibition signal is sent to avoid invalid charging behaviors. At the same time, to ensure charging safety and extend the battery life, when the battery needs to be charged, the BMS not only feedbacks a charging permission signal to the VCU, but also sends the maximum charging voltage and charging current limit value, so that the OBC can charge the battery at a reasonable voltage and current.

[0100] More specifically, as Figure 2 shown, still taking the electric working machine with one-key start as an example, in the case where the battery needs to be charged, the power-on process of the gun-insertion working mode specifically includes the following steps:

[0101] 201. Briefly press the one-key start button to turn on the high voltage of the vehicle, and the vehicle is in the high-voltage mode;

[0102] 202. After inserting the charging gun, the OBC detects the charging connection signal CC;

[0103] 203. Long press the one-key start button, and the vehicle is in the gun-insertion working mode;

[0104] 204. The VCU sends a charging request to the battery management system BMS;

[0105] 205. The VCU receives the charging execution signal sent by the BMS and the maximum charging voltage and charging current limit values allowed by the power battery;

[0106] 206. The VCU sends a charging execution signal and the maximum charging voltage and charging current limit values allowed by the power battery to the OBC;

[0107] 207. The OBC charges the power battery;

[0108] 208. The VCU sends a vehicle operation request to the microcontroller unit MCU;

[0109] 209. The VCU confirms whether the MCU performs the corresponding power-on mode; if so, go to step 210; if not, return to step 208;

[0110] 210. The OBC outputs voltage and current to supply power to the MCU;

[0111] 211. The MCU drives the motor to work.

[0112] As an embodiment of the present invention, sending the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine includes:

[0113] Sending the charging permission signal, the maximum charging voltage, and the charging current limit value received by the battery management system to the on-vehicle charger of the electric working machine; the charging permission signal is generated when the remaining power of the battery connected to the on-vehicle charger is less than the upper predetermined threshold, or when the remaining power is less than the lower predetermined threshold;

[0114] Sending the charging prohibition signal received by the battery management system to the on-vehicle charger of the electric working machine; the charging prohibition signal is generated when the remaining power is greater than or equal to the upper predetermined threshold.

[0115] Specifically, in the gun-inserted working mode, although the working machine is mainly powered by an external power source, the power supply for parts such as the display screen of the working machine is still provided by the battery. Therefore, in the gun-inserted working mode, the power of the battery also needs to be consumed, that is, the situation of simultaneous charging and discharging of the battery will occur, which greatly affects the service life of the battery. Based on this, in order to avoid multiple simultaneous charging and discharging of the battery, in the power-on method described in the embodiment of the present invention, the VCU will receive a charging permission signal or a charging prohibition signal from the battery management system. The charging permission signal is generated when the power of the battery is less than the upper predetermined threshold, that is, when the battery power is less than a certain amount, the battery will be charged in the gun-inserted working mode, and when the battery power is greater than or equal to the upper predetermined threshold, a charging prohibition signal will be sent to the VCU, so that the OBC stops charging the battery.

[0116] It can be understood that the charging permission signal is also generated when the remaining power of the battery is less than the lower limit of the predetermined threshold. That is, when the battery power is greater than or equal to the upper limit of the predetermined threshold, the battery is not charging. However, as the working machine continues to operate, the battery power is gradually consumed. If the battery is not charged at this time, when the next operation of the working machine is in the pure electric working mode, the battery power is likely to not meet the requirements of the working machine. Based on this, in the embodiment of the present invention, the charging permission signal is also set to be generated when the remaining power of the battery is less than the lower limit of the predetermined threshold, so that when the battery power is lower than a certain amount, the battery charging in the gun-inserted working mode is restored, which can ensure the battery power storage, avoid multiple simultaneous charging and discharging of the battery, and extend the battery life.

[0117] More specifically, the lower limit of the predetermined threshold and the upper limit of the predetermined threshold can be flexibly set as needed and are not limited by specific values. Preferably, they are set based on the battery SOC. For example, when the battery SOC is greater than or equal to 80%, the OBC is controlled to prohibit or stop charging the battery; when the battery SOC is less than 60%, the OBC is controlled to start or resume charging the battery.

[0118] As an embodiment of the present invention, powering on the electric working machine based on the determined power-on mode includes:

[0119] Powering on the electric working machine based on the charging mode;

[0120] The powering on the electric working machine based on the charging mode includes:

[0121] Sending a charging request to the battery management system of the electric working machine;

[0122] Sending the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, and a charging current limit;

[0123] Obtaining a second execution signal by the on-vehicle charger; the second execution signal is a signal sent when the on-vehicle charger charges the power battery of the electric working machine.

[0124] Specifically, the charging mode of the electric working machine can be completely controlled and executed based on the components of the electric working machine.

[0125] More specifically, as Figure 3 shown, still taking the electric working machine with one-key start as an example, the power-on process of the charging mode specifically includes the following steps:

[0126] 301. Briefly press the one-key start button to turn on the high voltage of the whole vehicle, and the whole vehicle is in the high-voltage mode;

[0127] 302. After plugging in the charging gun, the OBC detects the charging connection signal CC;

[0128] 303. The VCU sends a charging request to the BMS;

[0129] 304. The VCU receives the charging execution signal sent by the BMS and the maximum charging voltage and charging current limits allowed by the power battery;

[0130] 305. The VCU sends the charging execution signal and the maximum charging voltage and charging current limits allowed by the power battery to the OBC;

[0131] 306. The VCU confirms whether the OBC enters the corresponding power-on mode; if so, go to step 307; if not, return to step 305;

[0132] 307. The OBC charges the power battery.

[0133] As an embodiment of the present invention, powering on the electric working machine based on the determined power-on mode includes:

[0134] Powering on the electric working machine based on the pure electric working mode;

[0135] The powering on the electric working machine based on the pure electric working mode includes:

[0136] Sending a vehicle-wide working request to the micro control unit of the electric working machine;

[0137] The micro control unit obtains a third execution signal; the third execution signal is a signal sent by the micro control unit after driving the motor of the electric working machine to act under the power supply of the power battery of the electric working machine.

[0138] Specifically, the pure electric working mode of the electric working machine can be completely controlled and executed based on the components of the electric working machine.

[0139] More specifically, as Figure 4 shown, still taking the electric working machine with one-key start as an example, the power-on process of the pure electric working mode specifically includes the following steps:

[0140] 401. Briefly press the one-key start button to turn on the high voltage of the whole vehicle, and the whole vehicle is in the high voltage mode;

[0141] 402. Long press the one-key start button;

[0142] 403. The VCU sends a vehicle-wide working request to the MCU;

[0143] 404. The VCU confirms whether the MCU performs the corresponding power-on mode; if so, proceed to step 405; if not, return to step 403.

[0144] 405. The power battery outputs voltage and current to supply power to the MCU.

[0145] 406. The MCU drives the motor to work.

[0146] The power-on method of the electric working machine described in the embodiments of the present invention enables the electric working machine to automatically select and execute the power-on mode among the three power-on modes of the charging mode, the gun-inserted working mode, and the pure-electric working mode according to the actual situation. At the same time, through the control execution of the gun-inserted working mode, the electric working machine is no longer restricted by the battery life of the power battery and can meet the infinite endurance time. In addition, the power-on processes and methods of each component such as the MCU, VCU, OBC, and motor when the electric working machine executes each power-on mode are specifically designed, so that the multiple power-on trigger methods of the whole vehicle can be realized based on the existing components of the electric working machine.

[0147] Next, a power-on system of an electric working machine provided by the present invention will be described. The power-on system of an electric working machine described below can be mutually corresponding and referred to the power-on method of an electric working machine described above.

[0148] As Figure 5 shown, a power-on system of an electric working machine provided by an embodiment of the present invention includes a vehicle controller of the electric working machine; the vehicle controller VCU should at least include a first acquisition module 510, a second acquisition module 520, an adjustment module 530, and an execution module 540; wherein,

[0149] The first acquisition module 510 is configured to, after acquiring a signal indicating high voltage on the vehicle, make the electric working machine in a high-voltage mode.

[0150] The second acquisition module 520 is configured to acquire a charging connection status signal and a vehicle working status signal.

[0151] The adjustment module 530 is configured to adjust the electric working machine from the high-voltage mode to a corresponding power-on mode based on the charging connection status signal and the vehicle working status signal.

[0152] The execution module 540 is configured to power on the electric working machine based on the power-on mode.

[0153] For the power-on system of the electric working machine, after obtaining the signal indicating the high voltage on the whole vehicle through the first acquisition module of the VCU, the electric working machine is put into the high-voltage mode. Then, the charging connection status signal and the whole vehicle working status signal are obtained through the second acquisition module, and the adjustment module adjusts the electric working machine from the high-voltage mode to the corresponding power-on mode based on the charging connection status signal and the whole vehicle working status signal. Finally, the execution module powers on the electric working machine based on the power-on mode, realizing the automatic selection of the power-on mode for the electric working machine, that is, meeting the intelligent control of multiple power-on modes of the electric working machine, making the use of the electric working machine more convenient, solving the problem of limited endurance time caused by the power supply of the power battery, and making it possible to actually develop an electric working machine with automatic confirmation of the power-on mode and power-on control.

[0154] As an embodiment of the present invention, the charging connection status signal obtained by the second acquisition module includes: a charging connection valid signal and a charging connection invalid signal; the whole vehicle working status signal includes: a whole vehicle working signal and a whole vehicle standby signal;

[0155] The power-on system of the electric working machine further includes: a starting button of the electric working machine and an on-vehicle charger;

[0156] The starting button is used to send the high-voltage signal on the whole vehicle to the whole vehicle controller after pressing for a preset first duration, and send the whole vehicle working signal to the whole vehicle controller after pressing for a preset second duration;

[0157] The on-vehicle charger is used to send the charging connection valid signal to the whole vehicle controller after being correctly connected to the charging gun, and send the charging connection invalid signal to the whole vehicle controller when not connected to the charging gun or having a poor connection.

[0158] Specifically, the start of a general electric working machine includes a short press and a long press. Pressing for a preset first duration, generally a short press not exceeding 1 second, and then the VCU makes the high voltage on the whole vehicle after receiving the signal of the short press, that is, in the high-voltage mode. And pressing for a preset second duration, generally a long press not less than 3 seconds, the VCU knows that the whole machine is in the working state, that is, the fully started state after receiving the signal of the long press.

[0159] As an embodiment of the present invention, the whole vehicle controller is further used to generate the whole vehicle standby signal when the whole vehicle working signal is not received within a preset third duration after receiving the high-voltage signal on the whole vehicle.

[0160] Specifically, after the VCU powers on the high voltage on the whole vehicle, it needs to determine which power-on mode to adopt according to whether the whole vehicle is in a working state. The way for the VCU to know whether the whole machine is in a working state is by whether the start button is pressed for a preset second duration. Therefore, to ensure that the VCU can obtain the working state of the whole machine, it is set that the VCU continuously monitors whether it receives the whole vehicle working signal within a preset third duration. Here, the third duration can be flexibly set according to actual applications, such as set to 10 seconds, 15 seconds, 30 seconds, etc., and no specific limitation is made here.

[0161] Preferably, the adjustment module of the VCU is specifically configured to, based on the charging connection valid signal and the whole vehicle working signal, adjust the electric working machine from the high voltage mode to the gun plug-in working mode; based on the charging connection valid signal and the whole vehicle standby signal, adjust the electric working machine from the high voltage mode to the charging mode; and based on the charging connection invalid signal and the whole vehicle working signal, adjust the electric working machine from the high voltage mode to the pure electric working mode.

[0162] Preferably, the execution module of the VCU is specifically configured to send a charging request to the battery management system of the electric working machine; send the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, a charging current limit value, and a charging prohibition signal; after receiving the charging instruction execution signal by the on-vehicle charger, send a whole vehicle working request to the micro control unit of the electric working machine; obtain a first execution signal by the micro control unit; the first execution signal is a signal sent after the micro control unit drives the motor of the electric working machine to act under the power supply of the on-vehicle charger.

[0163] Preferably, the execution module of the VCU is more specifically configured to send the charging permission signal, the maximum charging voltage, and the charging current limit value received by the battery management system to the on-vehicle charger of the electric working machine; the charging permission signal is generated when the remaining power of the battery connected to the on-vehicle charger is less than a predetermined threshold upper limit, or the remaining power is less than a predetermined threshold lower limit; send the charging prohibition signal received by the battery management system to the on-vehicle charger of the electric working machine; the charging prohibition signal is generated when the remaining power is greater than or equal to the predetermined threshold upper limit.

[0164] Preferably, the execution module of the VCU is specifically configured to send a charging request to the battery management system of the electric working machine; send the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, and a charging current limit; obtain a second execution signal by the on-vehicle charger; the second execution signal is a signal sent when the on-vehicle charger charges the power battery of the electric working machine.

[0165] Preferably, the execution module of the VCU is further specifically configured to send a vehicle operation request to the micro control unit of the electric working machine; obtain a third execution signal by the micro control unit; the third execution signal is a signal sent after the micro control unit drives the motor of the electric working machine to operate under the power supply of the power battery of the electric working machine.

[0166] The present invention also provides a working machine including the power-on system of the electric working machine as described in any one of the above.

[0167] Specifically, the working machine including the power-on system of the electric working machine of the present invention has all the advantages and technical effects of the power-on system of the electric working machine, which will not be elaborated here.

[0168] More specifically, taking the working machine as an electric excavator as an example, the electronic control system of the electric excavator applying the power-on system of the electric working machine is as Figure 6 shown. Among them, the power grid 1 is connected to the charging gun 3 through the air switch 2. The OBC 4, BMS, power battery 5, MCU 6, and motor 7 on the electric excavator are connected in sequence. The one-key start button 8, OBC 4, BMS, power battery 5, and MCU 6 of the electric excavator are all connected to the VCU 9. Then, when the charging gun 3 is connected to the OBC 4, if the signals obtained by the VCU 9 from the one-key start button 8 and the OBC 4 are the vehicle operation signal and the charging connection signal CC respectively, it is determined that the power-on mode is the plug-in gun working mode. After that, the VCU 9 sends a charging request to the BMS. The BMS confirms the maximum charging voltage and charging current limit of the power battery according to the charging request, and then sends the charging permission signal, as well as the maximum charging voltage and charging current limit to the VCU 9. After the VCU 9 sends the charging permission signal, as well as the maximum charging voltage and charging current limit to the OBC 4, the OBC 4 returns a charging execution signal to the VCU 9, and the OBC 4 charges the power battery. After the MCU 6 confirms the request, it returns an execution power-on mode signal to the VCU 9, and drives the motor 7 to operate under the power supply of the OBC 4. Further, the motor 7 drives the hydraulic pump 10 to operate, and the hydraulic pump 10 drives the hydraulic system 11 to work.

[0169] Figure 7 Illustrates a schematic physical structure diagram of an electronic device, asFigure 7 As shown in Figure 7 , the electronic device may include: a processor 710, a communications interface 720, a memory 730, and a communication bus 740. Among them, the processor 710, the communications interface 720, and the memory 730 communicate with each other through the communication bus 740. The processor 710 can call the logical instructions in the memory 730 to execute a power-on method for an electric working machine. The method includes: after obtaining a signal indicating that the high voltage is on the whole vehicle, putting the electric working machine in a high-voltage mode; obtaining a charging connection status signal and a whole-vehicle working status signal; based on the charging connection status signal and the whole-vehicle working status signal, adjusting the electric working machine from the high-voltage mode to a corresponding power-on mode; and powering on the electric working machine based on the power-on mode.

[0170] In addition, when the logical instructions in the above-mentioned memory 730 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0171] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute a power-on method for an electric working machine provided by the above-mentioned various methods. The method includes: after obtaining a signal indicating that the high voltage is on the whole vehicle, putting the electric working machine in a high-voltage mode; obtaining a charging connection status signal and a whole-vehicle working status signal; based on the charging connection status signal and the whole-vehicle working status signal, adjusting the electric working machine from the high-voltage mode to a corresponding power-on mode; and powering on the electric working machine based on the power-on mode.

[0172] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it can implement a power-on method for an electric working machine provided by each of the above methods. The method includes: after obtaining a signal indicating that the vehicle is powered on at high voltage, putting the electric working machine in a high-voltage mode; obtaining a charging connection state signal and a vehicle working state signal; based on the charging connection state signal and the vehicle working state signal, adjusting the electric working machine from the high-voltage mode to a corresponding power-on mode; and powering on the electric working machine based on the power-on mode.

[0173] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative labor.

[0174] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0175] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrifying method for an electric working machine, characterized in that, Implemented by the vehicle controller of the electric working machine, the method includes: After obtaining the signal indicating high voltage on the vehicle, put the electric working machine in the high-voltage mode; Obtain the charging connection status signal and the vehicle working status signal; Based on the charging connection status signal and the vehicle working status signal, adjust the electric working machine from the high-voltage mode to the corresponding power-on mode; Power on the electric working machine based on the power-on mode; The charging connection status signal includes a charging connection valid signal and a charging connection invalid signal; the vehicle working status signal includes a vehicle working signal and a vehicle standby signal; The adjusting the electric working machine from the high-voltage mode to the corresponding power-on mode based on the charging connection status signal and the vehicle working status signal includes: Based on the charging connection valid signal and the vehicle working signal, adjust the electric working machine from the high-voltage mode to the plug-in gun working mode; Based on the charging connection valid signal and the vehicle standby signal, adjust the electric working machine from the high-voltage mode to the charging mode; Based on the charging connection invalid signal and the vehicle working signal, adjust the electric working machine from the high-voltage mode to the pure electric working mode; The powering on the electric working machine based on the power-on mode includes: Power on the electric working machine based on the plug-in gun working mode; The powering on the electric working machine based on the plug-in gun working mode includes: Send a charging request to the battery management system of the electric working machine; Send the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, a charging current limit value, and a charging prohibition signal; After receiving the charging instruction execution signal by the on-vehicle charger, send a vehicle working request to the micro control unit of the electric working machine; Obtain a first execution signal by the micro control unit; the first execution signal is a signal sent by the micro control unit after driving the motor of the electric working machine under the power supply of the on-vehicle charger.

2. The power-on method of the electric working machine according to claim 1, characterized in that The sending the charging instruction received by the battery management system to the on-vehicle charger of the electric working machine includes: Send the charging permission signal, the maximum charging voltage, and the charging current limit value received by the battery management system to the on-vehicle charger of the electric working machine; the charging permission signal is generated when the remaining power of the battery connected to the on-vehicle charger is less than the upper predetermined threshold, or the remaining power is less than the lower predetermined threshold; Send the charging prohibition signal received by the battery management system to the on-vehicle charger of the electric working machine; the charging prohibition signal is generated when the remaining power is greater than or equal to the upper predetermined threshold.

3. The power-on method of the electric working machine according to claim 1, characterized in that, The powering on the electric working machine based on the power-on mode includes: Power on the electric working machine based on the charging mode; The powering on the electric working machine based on the charging mode includes: Send a charging request to the battery management system of the electric working machine; Send the charging instruction received by the battery management system to the on-vehicle charger of the electric work machine; the charging instruction includes: a charging permission signal, a maximum charging voltage, and a charging current limit value. Obtain a second execution signal by the on-vehicle charger; the second execution signal is a signal sent when the on-vehicle charger charges the power battery of the electric work machine.

4. The power-on method of the electric working machine according to claim 1, characterized in that Power on the electric work machine based on the power-on mode, including: Power on the electric work machine based on the pure electric working mode. Power on the electric work machine based on the pure electric working mode, including: Send a vehicle-wide work request to the micro control unit of the electric work machine. Obtain a third execution signal by the micro control unit; the third execution signal is a signal sent after the micro control unit drives the motor of the electric work machine to operate under the power supply of the power battery of the electric work machine.

5. The power-on method of the electric working machine according to claim 1, characterized in that, The power-on system for the electric work machine further includes: a starting button of the electric work machine and an on-vehicle charger. The starting button is used to send the vehicle-wide high-voltage signal to the vehicle controller after pressing for a preset first duration, and send the vehicle-wide work signal to the vehicle controller after pressing for a preset second duration. The on-vehicle charger is used to send the charging connection valid signal to the vehicle controller after being correctly connected to the charging gun, and send the charging connection invalid signal to the vehicle controller when not connected to the charging gun or the connection is poor.

6. The power-on method of the electric working machine according to claim 5, characterized in that, The vehicle controller is further used to generate the vehicle-wide standby signal when the vehicle-wide work signal is not received within a preset third duration after receiving the vehicle-wide high-voltage signal.

7. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the power-on method of the electric work machine according to any one of claims 1 to 6.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the power-on method of the electric work machine according to any one of claims 1 to 6.

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