CN111900796A - Control system of electric excavator and electric excavator - Google Patents
Control system of electric excavator and electric excavator Download PDFInfo
- Publication number
- CN111900796A CN111900796A CN202010912647.7A CN202010912647A CN111900796A CN 111900796 A CN111900796 A CN 111900796A CN 202010912647 A CN202010912647 A CN 202010912647A CN 111900796 A CN111900796 A CN 111900796A
- Authority
- CN
- China
- Prior art keywords
- power supply
- alternating current
- subsystem
- relay
- supply subsystem
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The invention provides a control system of an electric excavator and the electric excavator, which relate to the technical field of excavator control and comprise the following steps: the system comprises a power subsystem, an alternating current power supply subsystem, a battery pack power supply subsystem and a control subsystem; the alternating current power supply subsystem is connected with the power subsystem through a first relay; the battery pack power supply subsystem is connected with the power subsystem through a second relay; when the alternating current power supply subsystem supplies power normally, the first relay is closed, and the second relay is opened; and the control subsystem is used for controlling the second relay to be closed when the power supply of the alternating current power supply subsystem fails. The invention provides a control system of an electric excavator and the electric excavator.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a control system of an electric excavator and the electric excavator.
Background
The excavator is an important engineering machine in engineering construction, the control system of domestic electric excavators mostly adopts the three-power system of a new energy automobile, and the working mode basically adopts the charge-discharge mode of the new energy automobile. Because the electric excavator is usually only used in a fixed place with a small moving range, the electric excavator has strong applicability to the plug-in working mode, and the plug-in working mode is an important research and development direction in the working mode of the existing electric excavator.
The excavator in the current market with the plug-in working mode is mainly a cable type electric excavator which generally directly gets electricity from a power grid. This kind of mode is met and is lost power when external power supply breaks down, threatens equipment and personnel's safety.
Disclosure of Invention
The invention aims to provide a control system of an electric excavator and the electric excavator, so as to solve the problem that the power supply reliability of the conventional power-on work electric excavator is poor.
The invention provides a technical scheme that:
in a first aspect, an embodiment of the present invention provides a control system for an electric excavator, where the control system includes a power subsystem, an ac power supply subsystem, a battery pack power supply subsystem, and a control subsystem; the alternating current power supply subsystem is connected with the power subsystem through a first relay; the battery pack power supply subsystem is connected with the power subsystem through a second relay; when the AC power supply subsystem supplies power normally, the first relay is closed, and the second relay is opened; and the control subsystem is used for controlling the second relay to be closed when the power supply of the alternating current power supply subsystem fails.
In one possible implementation, the control subsystem includes a data acquisition module, the data acquisition module including a voltage sampling circuit, a current sensor, and a temperature sensor; the voltage sampling circuit is connected with the alternating current power supply subsystem; the voltage sampling circuit is used for acquiring voltage intensity data of the alternating current power supply subsystem; the current sensor is connected with the alternating current power supply subsystem and used for acquiring current intensity data of the alternating current power supply subsystem; the temperature sensor is connected with the alternating current power supply subsystem and used for collecting temperature data of the alternating current power supply subsystem.
In one possible implementation, the control subsystem further includes a first controller, and the first controller is connected to the ac power supply subsystem, the battery pack power supply subsystem, and the power subsystem through communication buses, respectively.
In one possible implementation, the control system of the electric excavator further comprises a human-computer interaction assembly, and the human-computer interaction assembly is connected with the first controller through a communication bus; the man-machine interaction assembly comprises a mode switching instrument, and the mode switching instrument is used for receiving a user instruction so as to determine the current mode of the electric excavator; the mode of the electric excavator comprises a working mode and a charging mode; the working modes comprise a plug-in working mode and a pure electric working mode.
In one possible implementation, the AC power supply subsystem comprises an AC socket, an AC-DC converter; the AC socket is externally connected with an AC power supply; the AC socket is connected with the AC-DC converter.
In one possible implementation, the AC-DC converter is connected with the power subsystem through a first relay; when the first relay is closed, the alternating current-direct current converter converts external alternating current into direct current to supply power to the power subsystem.
In one possible implementation, the first controller is connected with the first relay; and the first controller is used for controlling the first relay to be closed when the power supply of the alternating current power supply subsystem is normal, and is also used for controlling the first relay to be opened when the power supply of the alternating current power supply subsystem fails.
In one possible implementation, the alternating current-direct current converter is connected with the battery pack power supply subsystem through a third relay; and the alternating current-direct current converter is used for converting the external alternating current into direct current to charge the battery pack power supply subsystem when the third relay is closed.
In one possible implementation, the first controller is connected with a third relay; and the first controller is used for controlling the third relay to be closed when the battery pack power supply subsystem needs to be charged, and is also used for controlling the third relay to be opened when the alternating current power supply subsystem is in normal power supply.
In a second aspect, an embodiment of the invention provides an electric excavator comprising the control system of any one of the embodiments of the first aspect above.
The invention provides a control system of an electric excavator and the electric excavator, wherein the control system comprises a power subsystem, an alternating current power supply subsystem, a battery pack power supply electronic system and a control subsystem; the alternating current power supply subsystem is connected with the power subsystem through a first relay; the battery pack power supply subsystem is connected with the power subsystem through a second relay; when the AC power supply subsystem supplies power normally, the first relay is closed, and the second relay is opened; and the control subsystem is used for controlling the second relay to be closed when the power supply of the alternating current power supply subsystem fails. Because the control system is provided with the battery pack power supply subsystem, when the external power supply fails, the external power supply can supply power through the battery pack power supply subsystem, so that the safety of equipment and personnel is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic block diagram of a control system of an electric excavator provided in the present invention;
fig. 2 is a schematic block diagram of a control system of an electric excavator according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a mode selection interface of a control system of an electric excavator according to an embodiment of the present invention;
fig. 4 is a control flowchart of a control system of an electric excavator according to an embodiment of the present invention.
Icon: 1-an ac-dc converter; 2-an alternating current socket; 3-a first controller; 4-a human-computer interaction component; 5-a power subsystem; 501-a second controller; 502-a motor; 6-a hydraulic pump; 7-a distribution box; 701-a first relay; 702-a third relay; 8-a power cell assembly; 9-a second relay; 10-a pilot switch; 11-a key; 12-a data acquisition module; 1201-a first current sensor; 1202-a first temperature sensor; 1203-a second temperature sensor; 1204-a voltage sampling circuit; 1205-second current sensor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The excavator is an important engineering machine in engineering construction, the control system of domestic electric excavators mostly adopts the three-power system of a new energy automobile, and the working mode basically adopts the charge-discharge mode of the new energy automobile. Because the electric excavator is usually only used in a fixed place with a small moving range, the electric excavator has strong applicability to the plug-in working mode, and the plug-in working mode is an important research and development direction in the working mode of the existing electric excavator.
The excavator in the current market with the plug-in working mode is mainly a cable type electric excavator which generally directly gets electricity from a power grid. This kind of mode is met and is lost power when external power supply breaks down, threatens equipment and personnel's safety.
Based on this, the control system of the electric excavator and the electric excavator provided by the embodiment of the invention are provided with the alternating current power supply subsystem and the battery pack power supply subsystem, when the electric excavator is in a normal power-on working mode, the alternating current power supply subsystem supplies power to the excavator, and the battery pack power supply subsystem serves as a fault emergency power supply. When the external power supply fails, the power can be supplied through the battery pack power supply subsystem, so that the safety of equipment and personnel is guaranteed.
For the convenience of understanding the present embodiment, a detailed description will be given of a control system control device of an electric excavator according to the present embodiment.
Referring to fig. 1, an embodiment of the present invention provides a control system for an electric excavator, where the control system includes a power subsystem 5, an ac power supply subsystem, a battery pack power supply subsystem, and a control subsystem.
The alternating current power supply subsystem is connected with the power subsystem 5 through a first relay 701; and the alternating current power supply subsystem can supply power to the power subsystem 5 when the electric excavator is in a normal power-on working mode. The battery pack power supply subsystem is connected with the power subsystem 5 through a second relay 9; and the battery pack power supply subsystem can supply power to the power subsystem 5 when the power supply of the alternating current power supply subsystem fails.
When the alternating current power supply subsystem supplies power normally, the first relay 701 is closed, and the second relay 9 is opened; the alternating current power supply subsystem is communicated with the power subsystem and supplies power to the power subsystem.
The control subsystem is used for controlling the second relay 9 to be closed when the power supply of the alternating current power supply subsystem fails; the battery pack power supply subsystem is communicated with the power subsystem and supplies power to the power subsystem.
Because the battery pack power supply subsystem is arranged in the control system, when the external power supply fails, the battery pack power supply subsystem can be used as a standby power supply to temporarily supply power to the power subsystem, so that the safety of equipment and personnel is guaranteed.
In some embodiments, referring to fig. 2, the ac power subsystem includes an ac outlet 2, an ac-dc converter 1; the AC socket 2 is externally connected with an AC power supply; the AC socket 2 is connected with the AC-DC converter 1; the alternating current-direct current converter 1 is connected with the power subsystem through a first relay 701; when the first relay 701 is closed, the ac-dc converter 1 converts the external ac power into dc power to supply power to the power subsystem 5.
In some embodiments, referring to fig. 2, the control subsystem includes a data acquisition module 12, and the data acquisition module 12 includes a voltage sampling circuit, a current sensor, and a temperature sensor. The voltage sampling circuit is connected with the alternating current power supply subsystem and is used for collecting voltage intensity data of the alternating current power supply subsystem. The current sensor is connected with the alternating current power supply subsystem and is used for collecting current intensity data of the alternating current power supply subsystem. The temperature sensor is connected with the alternating current power supply subsystem and used for collecting temperature data of the alternating current power supply subsystem. The data acquisition module can acquire the running data of the AC power supply subsystem in real time, so that the running state of the AC power supply subsystem can be known conveniently.
For example, the data acquisition module 12 includes a voltage sampling circuit 1204, a first current sensor 1201, a first temperature sensor 1202, a second current sensor 1205, a second temperature sensor 1203. The first current sensor 1201 is connected to the ac outlet 2, and the first current sensor 1201 is configured to collect current intensity data of the ac outlet 2. The first temperature sensor 1202 is connected to the ac outlet 2, and the first temperature sensor 1202 is configured to collect temperature data of the ac outlet 2. The voltage sampling circuit 1204 is connected to the ac-dc converter 1; the voltage sampling circuit is used for collecting voltage intensity data of the input end of the alternating current-direct current converter 1. The second current sensor 1205 is connected to the ac-dc converter 1, and the second current sensor is used to collect current intensity data of the ac-dc converter 1. The second temperature sensor 1203 is connected to the ac-dc converter 1, and the second temperature sensor 1203 is configured to collect temperature data of the ac-dc converter 1.
In some embodiments, referring to fig. 2, the control subsystem further includes a first controller 3, and the first controller 3 is connected to the ac power supply subsystem, the battery pack power supply subsystem, and the power subsystem 5 through communication buses.
In some embodiments, referring to fig. 2, the Battery pack power supply subsystem includes a power Battery pack 8, the power Battery pack 8 includes a power Battery pack and a Battery Management System (BMS) installed on the power Battery pack, and the BMS is capable of monitoring the operation data of the power Battery pack in real time.
In some embodiments, referring to fig. 2, the power subsystem 5 includes a second controller 501 and a motor, and the second controller 501 may specifically employ a Micro Controller Unit (MCU); the second controller 501 is connected with the motor 502, the motor is connected with the hydraulic pump 6 in a transmission mode, the motor 502 is controlled to output torque and rotating speed through the second controller 501, and the motor drives the hydraulic pump to further drive a hydraulic system of the electric excavator to operate.
In some embodiments, referring to fig. 2, the Control subsystem includes a first controller 3, and the first controller 3 may specifically adopt a Vehicle Control Unit (VCU) of a new energy Vehicle; the first controller 3 is respectively connected with the alternating current socket 2, the alternating current-direct current converter 1, the power battery pack, the BMS and the second controller 501 through communication buses; the communication bus may specifically adopt a Controller Area Network (CAN).
In some embodiments, referring to fig. 2, the first controller 3 is connected to the first relay 701; and the first controller 3 is used for controlling the first relay to be closed when the power supply of the alternating current power supply subsystem is normal, and is also used for controlling the first relay to be opened when the power supply of the alternating current power supply subsystem fails.
For example, when the ac receptacle 2 and the ac-dc converter 1 are simultaneously operating normally, the first controller 3 controls the first relay 701 to close. When the ac outlet 2 fails to operate or the ac-dc converter 1 fails to operate, the first controller 3 controls the first relay 701 to open.
The alternating current-direct current converter 1 is connected with the battery pack power supply subsystem through a third relay 702; when the third relay is closed, the ac-dc converter 1 can convert the external ac power into dc power to charge the battery power supply subsystem.
For example, the ac-dc converter 1 is connected to the power battery in the power battery assembly 8 through the third relay 702; and the alternating current-direct current converter 1 is used for converting external alternating current into direct current to charge the power battery pack when the third relay 702 is closed.
The first controller 3 is connected to the third relay 702; when the battery pack power supply subsystem needs to be charged, the first controller controls the third relay 702 to be closed; when the ac power supply subsystem is supplying power normally, the first controller 3 controls the third relay 702 to be turned off.
In some embodiments, referring to fig. 2, the first relay 701 and the third relay 702 may be integrated together by a distribution box 7 to save space.
In some embodiments, referring to fig. 2, the control system of the electric excavator further includes a human-computer interaction component 4, and the human-computer interaction component 4 is connected with the first controller through a communication bus, where the communication bus may specifically adopt a complete vehicle CAN.
For example, the human-computer interaction assembly 4 includes a mode switching meter, and the mode switching meter is used for receiving a user instruction to determine the current mode of the electric excavator; the mode of the electric excavator comprises a working mode and a charging mode; the working modes comprise a plug-in working mode and a pure electric working mode.
In some embodiments, referring to fig. 2, the control system further includes a pilot circuit connected to the first controller 3, a pilot switch 10 is disposed in the pilot circuit, and closing the pilot switch 10 can communicate the pilot circuit with the first controller 3.
The first controller 3 is provided with an ON switch, the ON switch is controlled by the key 11, the key 11 can be operated to trigger the ON switch to send a START signal to the first controller 3, and then the first controller 3 controls the electric excavator to enter a state of preparation for work; the pilot switch 10 is closed, the pilot circuit is communicated with the first controller 3, and the first controller 3 is triggered to enter a working state through pilot of the pilot circuit, so that the first controller 3 controls the excavator in the ready-to-work state to enter a discharging working mode.
The embodiment also provides an electric excavator which comprises the control system. Specifically, the electric excavator comprises an excavator main body and a control system; the control system is arranged on the excavator main body and is electrically connected with the excavator main body.
The electric excavator provided by the embodiment has the same technical characteristics as the control system, so the same technical problems can be solved, and the same technical effects can be achieved.
The invention provides a control system of an electric excavator and the electric excavator.
The working principle is as follows: in a normal power-plugging working mode, the power grid power distribution cabinet and the alternating current/direct current converter 1 in the alternating current power supply subsystem are connected through the automatic cable winding and unwinding device, alternating current of the power grid is rectified into a direct current power supply suitable for the excavator by the alternating current/direct current converter 1, the direct current power supply is directly supplied to the second controller 501 to drive the motor 502, and in the working mode, the battery pack power supply subsystem serves as a fault emergency power supply.
Referring to fig. 4, firstly, an ac power gun of the electric excavator is connected to the ac socket 2 to connect an ac power source; an operation key triggers an ON switch to be closed, all electrical components ON the whole electric excavator are awakened, after the first controller 3 detects a CC signal sent by the alternating current socket 2, the first controller 3 respectively sends an awakening signal Hx to the alternating current-direct current converter 1, the BMS, the second controller 501 and the mode switching instrument, and the mode switching instrument jumps out of a working mode selection interface after detecting the awakening signal Hx (see FIG. 3); after the 'working mode' is selected, the mode switching instrument uploads the working mode request information to the CAN bus, and after the first controller 3 receives the working mode request information, the first controller 3 sends an operation instruction to the AC-DC converter 1 on the CAN bus; after the alternating current-direct current converter 1 receives the operation instruction, the data acquisition module 12 acquires information such as voltage, current and temperature of the alternating current input end of the alternating current-direct current converter 1 for self diagnosis, and after the fact that no abnormality exists, the alternating current-direct current converter 1 is started to operate and reports the operation state to a CAN line; after the first controller 3 receives the normal operation state of the ac-dc converter 1, the first controller 3 controls the first relay 701 to be closed, so that the ac-dc converter 1 is conducted with the second controller 501; the first controller 3 controls the second relay 9 to be disconnected, so that the power battery pack is disconnected with the second controller; the first controller 3 controls the third relay 702 to be disconnected, so that the alternating current-direct current converter 1 is disconnected with the power battery pack; uploading respective running states of the relays on the CAN bus, and completing high-voltage electrification of the second controller 501; the key is operated to trigger the ON switch to send out a START signal, the first controller 3 controls the excavator to enter a READY state after detecting the START signal, the pilot switch 10 is closed to connect the pilot circuit, and the first controller 3 can enter a working mode after receiving the pilot signal XD.
The working mode can be divided into an electric-insertion working mode and a pure electric working mode; in the power-on working mode, the alternating-current direct-current converter 1 rectifies the alternating current of the power grid into a direct-current power supply suitable for the electric excavator, the direct-current power supply directly supplies power to the second controller 501 to drive the motor 502 to output rotating speed and torque, and further drives the hydraulic pump 6 to drive a hydraulic system of the excavator, and in the working mode, the power battery pack serves as a fault emergency power supply.
When the electric excavator works in the power-on working mode, an external alternating current power supply is suddenly powered off or the alternating current-direct current converter 1 stops running due to faults, the alternating current-direct current converter 1 immediately reports a running fault state on a CAN bus, and after the first controller 3 receives fault information, the first controller 3 controls the first relay 701 to be disconnected, so that the alternating current-direct current converter 1 is disconnected with the second controller 501; the first controller 3 controls the second relay 9 to be closed, so that the power battery pack is communicated with the second controller 501; the power battery pack provides a power supply to maintain the normal operation of the electric excavator, the electric excavator enters a pure electric working mode at the moment, and meanwhile, after the instrument in the human-computer interaction assembly 4 receives fault information, an excavator operator is prompted to stop for maintenance in modes of instrument screen flashing or sound alarm and the like.
When the excavator is in a pure electric working mode, the BMS monitors the running state of the power battery pack in real time, when the excavator is not externally connected with an alternating current power supply, an operation key triggers an ON switch to be closed, all electrical components ON the whole electric excavator are awakened, the first controller 3 sends awakening signals Hx to the alternating current-direct current converter 1, the BMS, the second controller 501 and the mode switching instrument respectively, the second relay 9 is closed, and the second controller is electrified at high voltage; the operation key switch sends out the START signal, and first controller 3 detects the START signal, and the excavator gets into READY mode, closes guide switch 10 and switches on the pilot circuit, and first controller 3 receives pilot signal XD and can get into operating mode, and the work can be carried out to the discharge working process that gets into under the electricelectric operating mode. The working circuit consists of a power battery pack, a BMS, a second controller 501 and a motor 502.
When the electric quantity of the power battery is exhausted, an Alternating Current (AC) insertion gun of the electric excavator is inserted into an AC socket 2, an AC power supply is connected, after a first controller 3 detects a CC signal sent by the AC socket 2, the first controller 3 respectively sends out a wake-up signal Hx to an AC-DC converter 1, a BMS, a second controller 501 and a mode switching instrument, and the mode switching instrument jumps out of a working mode selection interface after detecting the wake-up signal Hx (see FIG. 3); after the 'charging mode' is selected, the instrument uploads the charging mode request information to the CAN bus, the first controller 3 receives the charging mode request information and then reaches a charging command up and down on the CAN bus, the alternating current-direct current converter 1 and the BMS receive the operation command and then acquire the voltage, current, temperature and other information of the alternating current input end of the alternating current-direct current converter 1 through the data acquisition module 12 for self-diagnosis, after no abnormality is confirmed, charging interaction is carried out, the BMS reports the operation state and the charging information such as the charging voltage, the charging current, the SOC and the charging temperature to the CAN bus, and the instrument receives and displays the charging information in real time, namely enters the charging mode. If over-temperature, over-current and serious fault information of insulation value reduction are detected in the charging process, the first controller 3 immediately issues a charging stopping instruction, the alternating current-direct current converter 1 and the power battery stop charging, and the instrument displays fault information. The charging mode is composed of an AC gun, an AC socket 2, an AC-DC converter 1, a third relay 702, a power battery pack and a BMS.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A control system for an electric excavator, comprising: the system comprises a power subsystem, an alternating current power supply subsystem, a battery pack power supply subsystem and a control subsystem;
the alternating current power supply subsystem is connected with the power subsystem through a first relay;
the battery pack power supply subsystem is connected with the power subsystem through a second relay;
when the alternating current power supply subsystem supplies power normally, the first relay is closed, and the second relay is opened;
and the control subsystem is used for controlling the second relay to be closed when the AC power supply subsystem has power supply failure.
2. The control system of the electric excavator according to claim 1,
the control subsystem comprises a data acquisition module, and the data acquisition module comprises a voltage sampling circuit, a current sensor and a temperature sensor;
the voltage sampling circuit is connected with the alternating current power supply subsystem; the voltage sampling circuit is used for acquiring voltage intensity data of the alternating current power supply subsystem;
the current sensor is connected with the alternating current power supply subsystem and is used for acquiring current intensity data of the alternating current power supply subsystem;
the temperature sensor is connected with the alternating current power supply subsystem and used for collecting temperature data of the alternating current power supply subsystem.
3. The control system of the electric excavator according to claim 2,
the control subsystem further comprises a first controller, and the first controller is respectively connected with the alternating current power supply subsystem, the battery pack power supply subsystem and the power subsystem through communication buses.
4. The control system of the electric shovel according to claim 3,
the control system of the electric excavator further comprises a human-computer interaction assembly, and the human-computer interaction assembly is connected with the first controller through a communication bus;
the human-computer interaction assembly comprises a mode switching instrument, and the mode switching instrument is used for receiving a user instruction so as to determine the current mode of the electric excavator;
wherein the modes of the electric excavator comprise a working mode and a charging mode;
the working modes comprise a plug-in working mode and a pure electric working mode.
5. The control system of the electric shovel according to claim 3,
the alternating current power supply subsystem comprises an alternating current socket and an alternating current-direct current converter; the alternating current socket is externally connected with an alternating current power supply; the alternating current socket is connected with the alternating current-direct current converter.
6. The control system of the electric excavator according to claim 5,
the alternating current-direct current converter is connected with the power subsystem through a first relay;
when the first relay is closed, the alternating current-direct current converter converts external alternating current into direct current to supply power to the power subsystem.
7. The control system of the electric shovel according to claim 6,
the first controller is connected with the first relay;
the first controller is used for controlling the first relay to be closed when the alternating current power supply subsystem is in normal power supply, and is also used for controlling the first relay to be opened when the alternating current power supply subsystem has power supply faults.
8. The control system of the electric excavator according to claim 5,
the alternating current-direct current converter is connected with the battery pack power supply subsystem through a third relay;
and the alternating current-direct current converter is used for converting external alternating current into direct current to charge the battery pack power supply subsystem when the third relay is closed.
9. The control system of the electric excavator according to claim 8,
the first controller is connected with the third relay;
the first controller is used for controlling the third relay to be closed when the battery pack power supply subsystem needs to be charged, and is also used for controlling the third relay to be opened when the alternating current power supply subsystem is normally powered.
10. An electric excavator, characterized in that the electric excavator comprises the control system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010912647.7A CN111900796A (en) | 2020-09-02 | 2020-09-02 | Control system of electric excavator and electric excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010912647.7A CN111900796A (en) | 2020-09-02 | 2020-09-02 | Control system of electric excavator and electric excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111900796A true CN111900796A (en) | 2020-11-06 |
Family
ID=73224925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010912647.7A Pending CN111900796A (en) | 2020-09-02 | 2020-09-02 | Control system of electric excavator and electric excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111900796A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878415A (en) * | 2021-03-31 | 2021-06-01 | 三一重机有限公司 | Power module control method and system of electric excavator and electric excavator |
| CN112878416A (en) * | 2021-03-31 | 2021-06-01 | 三一重机有限公司 | Electric excavator working mode control method and system and electric excavator |
| CN113815435A (en) * | 2021-09-03 | 2021-12-21 | 国机重工集团常林有限公司 | Power system of electric hydraulic excavator |
-
2020
- 2020-09-02 CN CN202010912647.7A patent/CN111900796A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878415A (en) * | 2021-03-31 | 2021-06-01 | 三一重机有限公司 | Power module control method and system of electric excavator and electric excavator |
| CN112878416A (en) * | 2021-03-31 | 2021-06-01 | 三一重机有限公司 | Electric excavator working mode control method and system and electric excavator |
| WO2022206282A1 (en) * | 2021-03-31 | 2022-10-06 | 三一重机有限公司 | Method and system for controlling working mode of electric excavator, and electric excavator |
| CN112878415B (en) * | 2021-03-31 | 2022-10-11 | 三一重机有限公司 | Power module control method and system of electric excavator and electric excavator |
| CN113815435A (en) * | 2021-09-03 | 2021-12-21 | 国机重工集团常林有限公司 | Power system of electric hydraulic excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111900796A (en) | Control system of electric excavator and electric excavator | |
| CN112543717B (en) | Low-voltage storage battery charging system and method | |
| CN205113046U (en) | Vehicle -mounted storage battery battery charging outfit and system | |
| CN114123378B (en) | Power taking control method of electric automobile | |
| CN107611794A (en) | Fire-fighting power distribution cabinet based on bas and fas monitoring systems | |
| CN205709258U (en) | Elevator standby electricity management and control system | |
| CN212231163U (en) | Control system of electric excavator and electric excavator | |
| CN112793421A (en) | Storage battery power shortage prevention control system, electric vehicle and storage battery power shortage prevention control method | |
| CN112319227A (en) | High-voltage interlocking control system and method for pure electric vehicle | |
| CN111722125A (en) | Online energy-saving storage battery capacity test equipment | |
| CN112124132B (en) | Non-vehicle charging and discharging system in grid-connected mode and isolated grid mode and charging pile | |
| CN211046560U (en) | Automatic switching alarm device between independent UPS of transformer substation | |
| CN202696285U (en) | Boundary switch controller | |
| CN111443256A (en) | Fill electric pile performance detection device | |
| CN109130860B (en) | Multisource monitored control system and power module | |
| CN212313324U (en) | Electric motor car battery performance detection device | |
| CN110707809A (en) | Automatic switching alarm device between independent UPS of transformer substation | |
| CN217197788U (en) | Electric vehicle | |
| CN115954991B (en) | Online contravariant charge-discharge device of storage battery | |
| CN115107570B (en) | Electric vehicle, low-voltage battery control method and system thereof, and storage medium | |
| CN215813253U (en) | Remote control system for checking capacity of communication power supply storage battery | |
| CN212171939U (en) | New energy automobile power management system | |
| CN218633432U (en) | Power supply system and power supply equipment | |
| CN214083874U (en) | High-voltage interlocking control system of pure electric vehicle | |
| CN216312760U (en) | Energy storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |