CN114714931A - Power-on method and system for electric working machine and working machine - Google Patents
Power-on method and system for electric working machine and working machine Download PDFInfo
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- CN114714931A CN114714931A CN202210495381.XA CN202210495381A CN114714931A CN 114714931 A CN114714931 A CN 114714931A CN 202210495381 A CN202210495381 A CN 202210495381A CN 114714931 A CN114714931 A CN 114714931A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention provides a power-on method and a power-on system for an electric operating machine and the operating machine, which relate to the technical field of power-on control of the operating machine, and the method comprises the following steps: after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode; acquiring a charging connection state signal and a finished automobile working state signal; adjusting the electric operation machine from a high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal; based on the power-up mode, the electric work machine is powered up. The method is used for solving the defect that the difficulty in developing the electric operation machine with the gun plugging working mode is caused by only considering the connection relation between power supply and load and not considering how to realize power supply control when the electric operation machine capable of performing gun plugging work is designed in the prior art, realizing automatic power supply control of the electric operation machine and meeting the intelligent triggering of multiple power-on modes of the electric operation machine.
Description
Technical Field
The invention relates to the technical field of power-on control of working machines, in particular to a power-on method and system of an electric working machine and the working machine.
Background
The electric working machine uses a battery as a power source, and an on-board charger OBC as a charger to charge the battery. The electric quantity which can be arranged on the whole vehicle is smaller due to the space limitation of the working machine. The endurance time of the whole vehicle is limited, and the endurance time of the electrified work is generally 4 to 6 hours. The improvement of the working duration of the whole vehicle is a pain point of the electric operation machine. The best solution to this problem is to develop an electric working machine with a gun-plugging mode, that is, when an external power source is connected to the OBC through a charging gun, the external power source supplies electric power for the work of the working machine and charges a power battery of the working machine, thereby ensuring cruising.
However, the technical solutions that can realize the gun-plugging operation mode only disclose the connection relationships among the OBC, the power battery, the load device of the working machine, and the like, and it is only mentioned how to realize the power supply control of the power battery and the external power supply when the electric working machine is connected with or without the external power supply, so that it is very difficult to actually develop the electric working machine having the gun-plugging operation mode.
Disclosure of Invention
The invention provides a power-on method and system of an electric operating machine and the operating machine, which are used for solving the defect that the difficulty in developing the electric operating machine with a gun inserting working mode is caused by only considering the connection relation between power supply and load and not considering how to realize power supply control when the electric operating machine capable of inserting the gun is designed in the prior art, realizing the automatic power supply control of the electric operating machine and meeting the intelligent triggering of multiple power-on modes of the electric operating machine.
The invention provides a power-on method of an electric operation machine, which comprises the following steps:
after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode;
acquiring a charging connection state signal and a finished automobile working state signal;
adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal;
based on the power-up mode, power up the electric work machine.
According to the power-on method of the electric working machine of the present invention, the charging connection state signal includes a charging connection valid signal and a charging connection invalid signal; the whole vehicle working state signal comprises a whole vehicle working signal and a whole vehicle standby signal;
based on the charging connection state signal and the whole vehicle working state signal, the electric operation machine is adjusted from the high-voltage mode to a corresponding power-on mode, and the method comprises the following steps:
adjusting the electric operation machine from the high-voltage mode to a gun inserting operation mode based on the charging connection effective signal and the whole vehicle operation signal;
adjusting the electric operation machine from the high-voltage mode to a charging mode based on the charging connection effective signal and the whole vehicle standby signal;
and based on the charging connection invalid signal and the whole vehicle working signal, adjusting the high-voltage mode of the electric operation machine into a pure electric working mode.
According to the power-on method of an electric working machine according to the present invention, the power-on of the electric working machine based on the power-on mode includes:
powering up the electric work machine based on the gun insertion operating mode;
said powering up the electric work machine based on the gun insertion mode comprises:
sending a charging request to a battery management system of the electric work machine;
transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, a charge current limit, and a charge disable signal;
after receiving a charging instruction execution signal by the vehicle-mounted charger, sending a whole vehicle work request to a micro control unit of the electric operation machine;
acquiring, by the micro-control unit, a first execution signal; the first execution signal is a signal sent by the micro control unit after the micro control unit drives a motor of the electric working machine to act under the power supply of the vehicle-mounted charger.
According to the power-on method for an electric working machine of the present invention, the sending of the charging instruction received by the battery management system to the on-board charger for the electric working machine includes:
transmitting a charge permission signal, a maximum charge voltage, and a charge current limit value received by the battery management system to an on-vehicle charger of the electric working machine; the charging permission signal is generated when the residual capacity of a battery connected with the vehicle-mounted charger is smaller than a preset threshold upper limit or the residual capacity is smaller than a preset threshold lower limit;
transmitting a charge prohibition signal received by the battery management system to an on-board charger of the electric working machine; the charge prohibition signal is generated when the remaining capacity is greater than or equal to the predetermined upper threshold limit.
According to the power-on method of an electric working machine according to the present invention, the power-on of the electric working machine based on the determined power-on mode includes:
powering up the electric work machine based on the charging mode;
said powering the electric work machine based on the charging mode, comprising:
sending a charging request to a battery management system of the electric work machine;
transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, and a charge current limit;
acquiring a second execution signal by the vehicle-mounted charger; the second execution signal is a signal sent by the vehicle-mounted charger when the vehicle-mounted charger charges a power battery of the electric working machine.
According to the power-on method of an electric working machine according to the present invention, the power-on of the electric working machine based on the determined power-on mode includes:
powering up the electric working machine based on the pure electric working mode;
the said pure electric mode of operation based on, for the electricity is powered on to the said electric working machinery, including:
sending a whole vehicle work request to a micro control unit of the electric working machine;
acquiring, by the micro-control unit, a third execution signal; the third execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the power battery of the electric working machine.
The invention also provides a power-on system of the electric operation machine, which comprises a vehicle control unit of the electric operation machine;
the vehicle control unit is used for enabling the electric operation machine to be in a high-voltage mode after acquiring a signal indicating high voltage on the vehicle; acquiring a charging connection state signal and a finished automobile working state signal; adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal; and powering up the electric work machine based on the power-up mode.
According to the power-on system of the electric working machine, the charging connection state signal acquired by the vehicle control unit includes: a charging connection valid signal and a charging connection invalid signal; the whole vehicle working state signal comprises: a whole vehicle working signal and a whole vehicle standby signal;
the power-on system of the electric work machine further includes: a start button and a vehicle-mounted charger of the electric working machine;
the starting button is used for sending a high-voltage signal on the whole vehicle to the whole vehicle controller after a preset first time length is pressed, and sending a working signal of the whole vehicle to the whole vehicle controller after a preset second time length is pressed;
the vehicle-mounted charger is used for sending the charging connection valid signal to the vehicle control unit after being correctly connected with the charging gun, and sending the charging connection invalid signal to the vehicle control unit when the vehicle-mounted charger is not connected with the charging gun or is not in poor connection.
According to the power-on system of the electric working machine, the vehicle controller is further configured to generate the vehicle standby signal when the vehicle working signal is not received within a preset third time period after the vehicle high-voltage signal is received.
The present invention also provides a work machine comprising a power-on system for an electric work machine as defined in any of the above.
The present invention also provides an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements a method of powering up an electric work machine as described in any of the above when executing the program.
The invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of powering up an electric working machine as described in any of the above.
The invention provides a power-on method, a power-on system and an operating machine of an electric operating machine, after a signal indicating high voltage on a whole vehicle is obtained, the electric operation machine is in a high-voltage mode, a charging connection state signal and a whole vehicle working state signal are obtained, then the electric operation machine is adjusted from the high-voltage mode to a corresponding power-on mode according to the charging connection state signal and the whole vehicle working state signal, and finally the electric operation machine is powered on based on the power-on mode, so that the automatic selection of the power-on mode by the electric operation machine is realized, not only satisfies the intelligent control of multiple power-on modes of the electric operation machine, leads the use of the electric operation machine to be more convenient, solves the problem of limited endurance time of the electric operation machine caused by power supply of a power battery, and enables the practical development of an electric working machine having an automatic confirmation power-on mode and control of power-on.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram illustrating a method for powering up an electric work machine in accordance with the present disclosure;
FIG. 2 is a schematic diagram of a power-up process of a gun insertion mode provided by the present invention;
FIG. 3 is a schematic diagram of a power-up flow of a charging mode provided by the present invention;
FIG. 4 is a schematic diagram of a power-on process in a pure electric operating mode provided by the present invention;
FIG. 5 is a schematic diagram of a power-on system for an electric work machine according to the present disclosure;
fig. 6 is a schematic structural diagram of an electric control system of an electric excavator to which the power-on system of the electric working machine provided by the present invention is applied;
FIG. 7 is a schematic structural diagram of an electronic device provided by the present invention;
reference numerals:
1: a power grid; 2: opening in an empty state; 3: a charging gun; 4: OBC; 5: BMS and power batteries; 6: MCU; 7: a motor; 8: a key start button; 9: a VCU; 10: a hydraulic pump; 11: a hydraulic system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, a preferred method for solving the limitation of the entire cruising time of the electric working machine is to develop the electric working machine with a gun insertion working mode, however, the technical scheme capable of implementing the gun insertion working mode only describes the connection relationship among the OBC, the power battery, the load device of the working machine, and the like, and it is only mentioned how to implement how to automatically select the power-on mode according to different power supply conditions for the electric working machine, and to perform power-on control according to the selected power-on mode, so that it is very difficult to actually develop the electric working machine with the function of automatically confirming the power-on mode and controlling power-on.
Based on this, the embodiment of the present invention provides a power-on method for an electric working machine, which selects a power-on mode according to an acquired charging connection state signal and a vehicle operating state signal after the electric working machine is in a high-voltage mode, and then controls the electric working machine to power on according to the selected power-on mode, so that the automatic selection and power-on control of the power-on mode of the electric working machine are realized on the basis of no additional control component, the control mode is simple and easy to implement, and the development of the electric working machine with the function of automatically confirming the power-on mode and controlling the power-on mode becomes possible.
Meanwhile, in order to facilitate understanding of the technical solution of the present invention, terms mentioned in the following examples are explained first:
VCU: and the vehicle control unit is used for strategy management, signal relay and the like of three electric parts of the vehicle.
And (3) OBC: and the vehicle-mounted charger is used for converting the three-phase alternating current of the power grid into direct current to supply power to charge the battery.
BMS: and the battery management system is used for managing the power battery.
MCU: and the micro control unit is a bridge type conversion circuit consisting of IGBT or MOSFET and is used for controlling the rotating speed and the torque output by the motor.
Referring now to fig. 1-4, a method of powering an electric work machine, as implemented by a vehicle control unit VCU of the electric work machine or a combination of software and/or hardware therein, according to the present invention is described, as shown in fig. 1, the method comprising the steps of:
101. after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode;
it can be understood that after the electric working machine receives the high voltage signal on the whole vehicle, the VCU controls the high voltage on the electric working machine first, and even if the electric working machine is in the high voltage mode, the electric working machine can be operated subsequently after the high voltage is completed.
Specifically, for an electric working machine operated by a key, a high-voltage signal on the whole vehicle acquired by the VCU is generally acquired by twisting the key after the key is inserted into a key hole, and for an electric working machine controlled by a one-key start button, the high-voltage signal is acquired when the one-key start button is pressed for the first time when the electric working machine is powered off.
More specifically, after the high-voltage mode, various control components of the electric working machine are supplied with electric power and can work normally.
102. Acquiring a charging connection state signal and a finished automobile working state signal;
after the charging gun is inserted into the OBC, the electric working machine is connected to the charging pile to realize charging, and after the charging gun is inserted into the OBC, the mechanical lock on the gun head and the gun base of the OBC can confirm whether the charging gun is connected in place through the resistance between the alternating current of the charging pile and the ground wire, and the OBC can generate a charging connection signal CC after confirmation, and similarly, when the OBC is not confirmed, the OBC can also generate a signal that the charging is not connected or the connection is not in place.
Further, when the electric working machine is in the high-voltage mode, the key is turned or the key start button is pressed, so that the electric working machine is in the working state, that is, the electric working machine is in the formal opening state, and the electric working machine can perform corresponding operations such as walking and loading actions.
Based on this, the VCU can acquire the charging connection state signal by the OBC, and can acquire the vehicle operation state signal by the re-rotation of the key hole or the re-pressing of the one-key start button.
103. Adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal;
specifically, the VCU can determine the specific state of the entire vehicle, that is, whether the charging pile is connected or not, whether the charging pile is in a working state or a standby state or not, according to the obtained charging connection state signal and the acquired operating state signal of the entire vehicle, and further can accurately determine a proper power-on mode for the electric operating machine according to the states, that is, the electric operating machine is adjusted from the high-voltage mode to the corresponding power-on mode, so that the power-on mode of the electric operating machine is automatically selected and switched based on the VCU.
104. Powering up the electric work machine based on the power-up mode.
Specifically, the electric working machine is adjusted from the high-voltage mode to the corresponding power-on mode according to the charging connection state signal and the whole vehicle working state signal, and finally, the power-on mode is powered on for the electric working machine based on the power-on mode, so that the VCU based on the electric working machine enables the power-on mode of the electric working machine to be automatically selected and controlled to be powered on, the control mode is simple and easy to implement, and the development of the electric working machine with the functions of automatically confirming the power-on mode and controlling the power-on mode becomes possible.
As an embodiment of the present invention, the charge connection status signal includes a charge connection valid signal and a charge connection invalid signal; the whole vehicle working state signal comprises a whole vehicle working signal and a whole vehicle standby signal;
based on the charging connection state signal and the whole vehicle working state signal, the electric operation machine is adjusted from the high-voltage mode to a corresponding power-on mode, and the method comprises the following steps:
adjusting the electric operation machine from the high-voltage mode to a gun inserting operation mode based on the charging connection effective signal and the whole vehicle operation signal;
adjusting the electric operation machine from the high-voltage mode to a charging mode based on the charging connection effective signal and the whole vehicle standby signal;
and based on the charging connection invalid signal and the whole vehicle working signal, adjusting the high-voltage mode of the electric operation machine into a pure electric working mode.
Specifically, the VCU divides a power-on mode into a gun plugging mode, a charging mode and a pure electric mode based on a charging connection state of the electric working machine and a working state of the entire vehicle, namely, when a charging gun is effectively connected with the OBC and the entire vehicle is in the working state, the VCU adopts a gun plugging mode of supplying power to the electric working machine based on an external power supply and charging a power battery of the electric working machine; when the charging gun is effectively connected with the OBC and the whole vehicle is in a standby state, a charging mode for charging the power battery based on an external power supply is adopted; and when the charging gun is in invalid connection or disconnection with the OBC and the whole vehicle is in a working state, a pure electric working mode based on the power battery for supplying power to the electric operation machine is adopted.
More specifically, if the starting mode of the electric working machine is the one-key starting mode, the entire vehicle of the electric working machine may determine the power-on mode of the entire vehicle according to the short-press (e.g., 0.5 seconds, 1 second, etc.) one-key start, the charging connection signal CC, and the long-press (e.g., 2 seconds, 3 seconds, etc.) one-key start, as shown in table 1:
TABLE 1 Power-on mode correspondence table
As can be seen from table 1, when the short-press one-key start-up is valid, the charging connection signal CC is invalid, and the long-press one-key start-up is valid, and the entire vehicle is in the pure electric operating mode.
When the short-press one-key starting is effective, the charging connection signal CC is effective, and the long-press one-key starting is effective, the whole vehicle is in the gun inserting working mode.
When the short-press one-key is used for starting the machine effectively, the charging connection signal CC is effective, and the long-press one-key is used for starting the machine inefficiently, the whole vehicle is in a charging mode.
As an embodiment of the present invention, the powering up the electric working machine based on the power-up mode includes:
powering up the electric work machine based on the gun insertion operating mode;
said powering up the electric work machine based on the gun insertion mode comprises:
sending a charging request to a battery management system of the electric work machine;
transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, a charge current limit, and a charge disable signal;
after the vehicle-mounted charger receives a charging instruction execution signal, a whole vehicle working request is sent to a micro control unit of the electric operation machine;
acquiring, by the micro-control unit, a first execution signal; the first execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the vehicle-mounted charger.
Specifically, the gun insertion mode of the electric working machine can be controlled and executed based entirely on the components of the electric working machine.
It can be appreciated that the battery is not required to be charged when fully charged, and thus, in the gun insertion mode, when the BMS receives a charging request, it will first detect the amount of power of the battery, and when the battery is not required to be charged, it is not necessary to feed back a charging enable signal to the VCU, but rather a charging disable signal is sent to avoid invalid charging behavior, and meanwhile, in order to ensure charging safety and extend battery life, when the battery is required to be charged, the BMS feeds back not only the charging enable signal to the VCU, but also sends maximum charging voltage and charging current limits to enable the OBC to charge the battery at reasonable voltages and currents.
More specifically, as shown in fig. 2, still taking an electric working machine started by one key as an example, in the case that the battery needs to be charged, the power-on process of the gun insertion operation mode specifically includes the following steps:
201. the whole vehicle is in a high-voltage mode by pressing a key to start the button for a short time;
202. after the charging gun is plugged, the OBC detects a charging connection signal CC;
203. a one-key starting button is pressed for a long time, and the whole vehicle is in a gun inserting working mode;
204. the VCU sends a charging request to a battery management system BMS;
205. the VCU receives a charging execution signal sent by the BMS and the maximum charging voltage and the maximum charging current limit value allowed by the power battery;
206. the VCU sends a charging execution signal and the maximum charging voltage and the charging current limit value allowed by the power battery to the OBC;
207. the OBC charges the power battery;
208. the VCU sends a whole vehicle work request to the MCU;
209. the VCU confirms whether the MCU carries out a corresponding power-on mode or not; if yes, go to step 210; if not, returning to step 208;
210. the OBC outputs voltage and current to power the MCU;
211. the MCU drives the motor to work.
As an embodiment of the present invention, the transmitting a charging instruction received by the battery management system to an on-vehicle charger of the electric working machine includes:
transmitting a charge permission signal, a maximum charge voltage, and a charge current limit value received by the battery management system to an on-vehicle charger of the electric working machine; the charging permission signal is generated when the residual capacity of a battery connected with the vehicle-mounted charger is smaller than a preset threshold upper limit or the residual capacity is smaller than a preset threshold lower limit;
transmitting a charge prohibition signal received by the battery management system to an on-board charger of the electric working machine; the charge prohibition signal is generated when the remaining capacity is greater than or equal to the predetermined upper threshold limit.
Specifically, in the gun insertion mode, although the work machine is mainly powered by the external power source, the power supply to the display screen and other parts of the work machine is still supplied by the battery, and therefore, in the gun insertion mode, the power of the battery is consumed, that is, the battery is charged and discharged simultaneously, which greatly affects the service life of the battery. Based on this, in order to avoid charging and discharging the battery multiple times simultaneously, in the power-on method according to the embodiment of the present invention, the VCU receives a charge permission signal or a charge prohibition signal from the battery management system, where the charge permission signal is generated when the electric quantity of the battery is less than a predetermined upper threshold, that is, when the electric quantity of the battery is less than a certain amount, the battery is charged in the gun insertion operating mode, and when the electric quantity of the battery is greater than or equal to the predetermined upper threshold, the charge prohibition signal is sent to the VCU, so that the OBC stops charging the battery.
It will be appreciated that the charge enable signal is also generated when the remaining charge of the battery is less than a predetermined lower threshold, i.e. when the charge of the battery is greater than or equal to the predetermined upper threshold, the battery is not charged, but the charge of the battery is gradually consumed with the continuous operation of the work machine, and if the battery is not charged at this time, the charge of the battery is likely to be insufficient for the work machine to work when the next operation of the work machine is in the pure electric operation mode. Based on this, in the embodiment of the present invention, it is further set that the charge permission signal is generated when the remaining power of the battery is less than the predetermined threshold lower limit, that is, when the power of the battery is less than a certain amount, the battery charge in the gun insertion operating mode is resumed, so that the power storage of the battery can be ensured, the battery is prevented from being charged and discharged simultaneously for many times, and the battery life is prolonged.
More specifically, the predetermined lower threshold and the predetermined upper threshold can be flexibly set as needed, and are not limited to specific values, and are preferably set based on the battery SOC, for example: when the SOC of the battery is greater than or equal to 80%, controlling the OBC to prohibit or stop charging the battery; and when the SOC of the battery is less than 60%, the OBC is controlled to start or recover charging the battery.
As an embodiment of the present invention, the powering up the electric working machine based on the determined power-up mode includes:
powering up the electric work machine based on the charging mode;
said powering the electric work machine based on the charging mode, comprising:
sending a charging request to a battery management system of the electric work machine;
transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, and a charge current limit;
acquiring a second execution signal by the vehicle-mounted charger; the second execution signal is a signal sent by the vehicle-mounted charger when the vehicle-mounted charger charges a power battery of the electric working machine.
Specifically, the charging mode of the electric working machine can be controlled and executed based entirely on the components of the electric working machine.
More specifically, as shown in fig. 3, still taking an electric work machine started by one key as an example, the power-on process of the charging mode specifically includes the following steps:
301. the whole vehicle is in a high-voltage mode by pressing a key to start the button for a short time;
302. after the charging gun is plugged, the OBC detects a charging connection signal CC;
303. the VCU sends a charging request to the BMS;
304. the VCU receives a charging execution signal sent by the BMS and the maximum charging voltage and the charging current limit value allowed by the power battery;
305. the VCU sends a charging execution signal and the maximum charging voltage and the charging current limit value allowed by the power battery to the OBC;
306. the VCU confirms whether the OBC carries out a corresponding power-on mode or not; if yes, go to step 307; if not, returning to the step 305;
307. the OBC charges the power battery.
As an embodiment of the present invention, the powering up the electric working machine based on the determined power-up mode includes:
powering up the electric working machine based on the pure electric working mode;
the said pure electric mode of operation based on, for the electricity is powered on to the said electric working machinery, including:
sending a whole vehicle work request to a micro control unit of the electric operation machine;
acquiring, by the micro-control unit, a third execution signal; the third execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the power battery of the electric working machine.
Specifically, the electric work machine's electric-only operating mode can be controlled and executed based entirely on the electric work machine's components.
More specifically, as shown in fig. 4, still taking an electric work machine started by one key as an example, the power-on process of the pure electric operation mode specifically includes the following steps:
401. the whole vehicle is in a high-voltage mode by pressing a key to start the button for a short time;
402. a long-press one-key start button;
403. the VCU sends a whole vehicle work request to the MCU;
404. the VCU confirms whether the MCU carries out a corresponding power-on mode or not; if yes, go to step 405; if not, returning to the step 403;
405. the power battery outputs voltage and current to supply power to the MCU;
406. the MCU drives the motor to work.
According to the power-on method of the electric operation machine, the electric operation machine can automatically select and execute the power-on mode under the charging mode, the gun insertion working mode and the pure electric working mode according to the actual conditions, and meanwhile, the electric operation machine is not limited by the endurance of a power battery any more through the control execution of the gun insertion working mode, so that the infinite endurance time can be met. In addition, the power-on process and the power-on method of each part such as the MCU, the VCU, the OBC and the motor when the electric operation machine executes each power-on mode are specifically designed, so that the multi-power-on triggering mode of the whole vehicle can be realized based on the existing elements of the electric operation machine.
In the following, a description is given of a power-up system of an electric working machine according to the present invention, and a power-up system of an electric working machine described below and a power-up method of an electric working machine described above are referred to in correspondence with each other.
As shown in fig. 5, a power-on system of an electric working machine according to an embodiment of the present invention includes a vehicle control unit of the electric working machine; the VCU should at least include a first obtaining module 510, a second obtaining module 520, an adjusting module 530, and an executing module 540; wherein the content of the first and second substances,
the first obtaining module 510 is configured to obtain a signal indicating a high voltage on the entire vehicle, and then enable the electric working machine to be in a high voltage mode;
the second obtaining module 520 is configured to obtain a charging connection state signal and a vehicle working state signal;
the adjusting 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 operating status signal;
the execution module 540 is configured to power up the electric work machine based on the power-up mode.
The power-on system of the electric operation machine firstly obtains a signal indicating high voltage on the whole vehicle through a first obtaining module of a VCU, then the electric operation machine is in a high-voltage mode, then a charging connection state signal and a whole vehicle working state signal are obtained through a second obtaining module, the adjusting module adjusts the electric operation machine from the high-voltage mode to a corresponding power-on mode according to the charging connection state signal and the whole vehicle working state signal, finally the electric operation machine is powered on through an executing module based on the power-on mode, the automatic selection of the power-on mode by the electric operation machine is realized, namely the intelligent control of multiple power-on modes of the electric operation machine is satisfied, the electric operation machine is more convenient to use, and the problem that the endurance time of the electric operation machine is limited due to power supply of a power battery is solved, and enables the practical development of an electric working machine having an automatic confirmation power-on mode and control of power-on.
As an embodiment of the present invention, the charging connection status signal acquired by the second acquiring module includes: a charging connection valid signal and a charging connection invalid signal; the whole vehicle working state signal comprises: a whole vehicle working signal and a whole vehicle standby signal;
the power-on system of the electric work machine further includes: a start button and a vehicle-mounted charger of the electric working machine;
the starting button is used for sending a high-voltage signal on the whole vehicle to the whole vehicle controller after a preset first time length is pressed, and sending a working signal of the whole vehicle to the whole vehicle controller after a preset second time length is pressed;
the vehicle-mounted charger is used for sending the charging connection valid signal to the vehicle control unit after being correctly connected with the charging gun, and sending the charging connection invalid signal to the vehicle control unit when the vehicle-mounted charger is not connected with the charging gun or is not in poor connection.
Specifically, the starting of a general electric working machine includes a short press and a long press, wherein the press is preset for a first time period, generally the short press is not more than 1 second, then the VCU receives a signal of the short press and then enables the whole vehicle to be in a high-voltage mode, and the press is preset for a second time period, generally the long press is not less than 3 seconds, and after receiving the signal of the long press, the VCU knows that the whole machine is in a working state, namely a fully starting state.
As an embodiment of the present invention, the vehicle controller is further configured to generate the vehicle standby signal when the vehicle operating signal is not received within a preset third time period after the vehicle high voltage signal is received.
Specifically, after the VCU controls the high voltage on the entire vehicle, which power-on mode is adopted needs to be determined according to whether the entire vehicle is in the working state, and the VCU knows whether the entire vehicle is in the working state by whether the start button is pressed for the preset second time period, so that in order to ensure that the VCU can acquire the working state of the entire vehicle, the VCU is set to continuously monitor whether the entire vehicle working signal is received within the preset third time period, wherein the third time period can be flexibly set according to actual application, for example, set to 10 seconds, 15 seconds, 30 seconds, and the like, and no specific limitation is made herein.
Preferably, the adjustment module of the VCU is specifically configured to adjust the electric working machine from the high-voltage mode to a gun insertion working mode based on the charging connection effective signal and a vehicle working signal; adjusting the electric operation machine from the high-voltage mode to a charging mode based on the charging connection effective signal and the whole vehicle standby signal; and adjusting the electric operation machine from the high-voltage mode to a pure electric operation mode based on the charging connection invalid signal and the whole vehicle working signal.
Preferably, the execution module of the VCU is specifically configured to send a charging request to a battery management system of the electric working machine; transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge-enabling signal, a maximum charge voltage, a charge current limit, and a charge-inhibiting signal; after receiving a charging instruction execution signal by the vehicle-mounted charger, sending a whole vehicle work request to a micro control unit of the electric operation machine; acquiring, by the micro-control unit, a first execution signal; the first execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the vehicle-mounted charger.
Preferably, the execution module of the VCU is more specifically configured to send the charge permission signal, the maximum charge voltage, and the charge current limit value received by the battery management system to an onboard charger of the electric work machine; the charging permission signal is generated when the residual capacity of a battery connected with the vehicle-mounted charger is smaller than a preset threshold upper limit or the residual capacity is smaller than a preset threshold lower limit; transmitting a charge prohibition signal received by the battery management system to an on-board charger of the electric working machine; the charge prohibition signal is generated when the remaining capacity is greater than or equal to the predetermined upper threshold limit.
Preferably, the execution module of the VCU is specifically configured to send a charging request to a battery management system of the electric working machine; transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, and a charge current limit; acquiring a second execution signal by the vehicle-mounted charger; the second execution signal is a signal sent by the vehicle-mounted charger when the vehicle-mounted charger charges a power battery of the electric working machine.
Preferably, the execution module of the VCU is further specifically configured to send a vehicle operation request to a micro control unit of the electric working machine; acquiring, by the micro-control unit, a third execution signal; the third execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the power battery of the electric working machine.
The present invention also provides a work machine comprising a power-on system for an electric work machine as defined in any of the above.
Specifically, the work machine including the power-on system of the electric work machine according to the present invention has all the advantages and technical effects of the power-on system of the electric work machine, and details thereof are not described herein.
More specifically, taking the working machine as an electric excavator as an example, an electric control system of an electric excavator to which a power-on system of the electric working machine is applied is shown in fig. 6, in which a power grid 1 is connected to a charging gun 3 through a blank 2, an OBC4, a BMS, a power battery 5, an MCU6, and a motor 7 of the electric excavator are sequentially connected, a one-key start button 8, an OBC4, the BMS, the power battery 5, and the MCU6 of the electric excavator are all connected to a VCU9, and then, when the charging gun 3 is connected to an OBC4, if signals obtained by the one-key start button 8 and the OBC4 of the VCU9 are a vehicle operation signal and a charging connection signal CC, respectively, the power-on mode is determined as a gun-on operation mode, and then the VCU9 sends a charging request to the BMS, confirms a maximum charging voltage and a charging current limit value of the power battery according to the charging request, and then sends a charging permission signal, and the maximum charging voltage and charging current limit value to the VCU9, after the VCU9 sends the charge permission signal, the maximum charge voltage and the charge current limit value to the OBC4, the OBC4 returns a charge execution signal to the VCU9, the OBC4 charges the power battery, and the MCU6 returns a power-on execution mode signal to the VCU9 after confirming the request, and drives the motor 7 to operate under the power supply of the OBC4, so that the motor 7 drives the hydraulic pump 10 to operate, and the hydraulic pump 10 drives the hydraulic system 11 to operate.
Fig. 7 illustrates a physical structure diagram of an electronic device, and as shown in fig. 7, the electronic device may include: a processor (processor)710, a communication Interface (Communications Interface)720, a memory (memory)730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a method of powering up an electric work machine, the method comprising: after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode; acquiring a charging connection state signal and a finished automobile working state signal; adjusting the electric operating machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal; based on the power-up mode, power up the electric work machine.
In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform a method of powering up an electric work machine provided by the above methods, the method comprising: after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode; acquiring a charging connection state signal and a finished automobile working state signal; adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal; based on the power-up mode, power up the electric work machine.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, is capable of implementing a method of powering up an electric work machine provided by the above methods, the method comprising: after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode; acquiring a charging connection state signal and a finished automobile working state signal; adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal; powering up the electric work machine based on the power-up mode.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A method of powering an electric work machine, comprising:
after a signal indicating high voltage on the whole vehicle is acquired, the electric operating machine is in a high-voltage mode;
acquiring a charging connection state signal and a finished automobile working state signal;
adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal;
based on the power-up mode, power up the electric work machine.
2. The method of powering up an electric work machine according to claim 1, characterized in that the charge connection status signal comprises a charge connection valid signal and a charge connection invalid signal; the whole vehicle working state signal comprises a whole vehicle working signal and a whole vehicle standby signal;
based on the charging connection state signal and the whole vehicle working state signal, the electric operation machine is adjusted from the high-voltage mode to a corresponding power-on mode, and the method comprises the following steps:
adjusting the electric operation machine from the high-voltage mode to a gun inserting operation mode based on the charging connection effective signal and the whole vehicle operation signal;
adjusting the electric operation machine from the high-voltage mode to a charging mode based on the charging connection effective signal and the whole vehicle standby signal;
and based on the charging connection invalid signal and the whole vehicle working signal, adjusting the high-voltage mode of the electric operation machine into a pure electric working mode.
3. The method of powering an electric work machine according to claim 2, wherein said powering up the electric work machine based on the power-up mode comprises:
powering up the electric work machine based on the gun insertion operating mode;
said powering up the electric work machine based on the gun insertion mode comprises:
sending a charging request to a battery management system of the electric work machine;
transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, a charge current limit, and a charge disable signal;
after receiving a charging instruction execution signal by the vehicle-mounted charger, sending a whole vehicle work request to a micro control unit of the electric operation machine;
acquiring, by the micro-control unit, a first execution signal; the first execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the vehicle-mounted charger.
4. A method of powering up an electric work machine according to claim 3, wherein said sending of a charging command received by said battery management system to an onboard charger of said electric work machine comprises:
transmitting a charge permission signal, a maximum charge voltage, and a charge current limit value received by the battery management system to an on-vehicle charger of the electric working machine; the charging permission signal is generated when the residual capacity of a battery connected with the vehicle-mounted charger is smaller than a preset threshold upper limit or the residual capacity is smaller than a preset threshold lower limit;
transmitting a charge prohibition signal received by the battery management system to an on-board charger of the electric working machine; the charge prohibition signal is generated when the remaining capacity is greater than or equal to the predetermined upper threshold limit.
5. The method of powering up an electric work machine according to claim 2, wherein said powering up the electric work machine based on the determined power up mode comprises:
powering up the electric work machine based on the charging mode;
said powering the electric work machine based on the charging mode, comprising:
sending a charging request to a battery management system of the electric work machine;
transmitting a charging instruction received by the battery management system to an on-board charger of the electric working machine; the charging instructions include: a charge enable signal, a maximum charge voltage, and a charge current limit;
acquiring a second execution signal by the vehicle-mounted charger; the second execution signal is a signal sent by the vehicle-mounted charger when the vehicle-mounted charger charges a power battery of the electric working machine.
6. The method of powering up an electric work machine according to claim 2, wherein said powering up the electric work machine based on the determined power up mode comprises:
powering up the electric working machine based on the pure electric working mode;
the said pure electric mode of operation based on, for the electricity is powered on to the said electric working machinery, including:
sending a whole vehicle work request to a micro control unit of the electric working machine;
acquiring, by the micro-control unit, a third execution signal; the third execution signal is a signal sent by the micro control unit after the micro control unit drives the motor of the electric working machine to act under the power supply of the power battery of the electric working machine.
7. A power-on system of an electric working machine is characterized by comprising a vehicle control unit of the electric working machine;
the vehicle control unit is used for enabling the electric operation machine to be in a high-voltage mode after acquiring a signal indicating high voltage on the vehicle; acquiring a charging connection state signal and a finished automobile working state signal; adjusting the electric operation machine from the high-voltage mode to a corresponding power-on mode based on the charging connection state signal and the whole vehicle working state signal; and powering up the electric work machine based on the power-up mode.
8. The power-on system of an electric work machine according to claim 7, wherein the charging connection status signal acquired by the vehicle control unit includes: a charging connection valid signal and a charging connection invalid signal; the whole vehicle working state signal comprises: a whole vehicle working signal and a whole vehicle standby signal;
the power-on system of the electric work machine further includes: a start button and a vehicle-mounted charger of the electric working machine;
the starting button is used for sending a high-voltage signal on the whole vehicle to the whole vehicle controller after a preset first time length is pressed, and sending a working signal of the whole vehicle to the whole vehicle controller after a preset second time length is pressed;
the vehicle-mounted charger is used for sending the charging connection valid signal to the vehicle control unit after being correctly connected with the charging gun, and sending the charging connection invalid signal to the vehicle control unit when the vehicle-mounted charger is not connected with the charging gun or is not in poor connection.
9. The power-on system of an electric working machine according to claim 8, wherein the vehicle controller is further configured to generate the vehicle standby signal when the vehicle operating signal is not received within a preset third time period after the vehicle high voltage signal is received.
10. A work machine, characterized by comprising an electric power-on system of an electric work machine according to any of claims 7 to 9.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements a method of powering up an electric work machine according to any of claims 1 to 6.
12. A non-transitory computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, carries out a method of powering up an electric work machine according to any one of claims 1 to 6.
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| CN202210495381.XA CN114714931A (en) | 2022-05-07 | 2022-05-07 | Power-on method and system for electric working machine and working machine |
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| CN202210495381.XA CN114714931A (en) | 2022-05-07 | 2022-05-07 | Power-on method and system for electric working machine and working machine |
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