CN114084001A - Control method for charging of electric excavator - Google Patents
Control method for charging of electric excavator Download PDFInfo
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- CN114084001A CN114084001A CN202111521023.3A CN202111521023A CN114084001A CN 114084001 A CN114084001 A CN 114084001A CN 202111521023 A CN202111521023 A CN 202111521023A CN 114084001 A CN114084001 A CN 114084001A
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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
- 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
- B60L53/60—Monitoring or controlling charging stations
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of electric excavators, in particular to a control method for charging an electric excavator, which realizes quick charging and slow charging by using a charging lock switch, wherein the charging lock switch is provided with a first gear and a second gear, and the steps comprise: s1, the charging lock switch is shifted to a first gear, and other equipment in the charging system can be charged and awakened; and S2, the charging lock switch is clicked to the second gear, and slow charging or quick charging can be started. According to the charging system, the charging lock switch is arranged, so that the charging gun can provide power for other equipment in the charging system to be charged and awakened under the condition that an auxiliary power supply is not prepared; by combining the functions of the charging lock switch, the charging logic during quick charging and slow charging is optimized, and the risk avoidance in the charging operation process can be realized; personnel's operation is safe simple more, and when the lock switch second gear that charges was not touched, it can't be connected with the charging seat to fill the rifle slowly, fills the rifle soon and also can not charge the flow, and is safer even insert the charging seat.
Description
Technical Field
The invention relates to the technical field of electric excavators, in particular to a control method for charging an electric excavator.
Background
The electric excavator is divided into an electric excavator based on a high voltage working system and an electric excavator based on a low voltage system working system, the electric excavator based on the high voltage working system can be directly provided with a charging gun and a charging seat which have the existing standards, but the safety of assembly and maintenance is considered, and the electric excavator based on the low voltage system working system has more advantages.
The large-current direct-current charging gun is required to be equipped for an electric excavator of a low-voltage working system, but in the current market, the large-current direct-current charging gun is not equipped with an auxiliary power supply, so that low-voltage charging equipment cannot be charged and awakened, an electronic lock is not equipped, and great potential safety hazards exist during operation.
Disclosure of Invention
The invention aims to provide a control method for charging of an electric excavator, which is safe and reliable and can provide charging awakening for a charging gun without an auxiliary power supply, and avoids risks caused by improper operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for charging of an electric excavator is characterized in that quick charging and slow charging are achieved through a charging lock switch, the charging lock switch is provided with a first gear and a second gear, and the steps include:
s1, the charging lock switch is turned to the first gear, and other equipment in the charging system can be charged and awakened;
and S2, the charging lock switch is clicked to the second gear, and slow charging or quick charging can be started.
Preferably, step S1 includes:
s11, the charging lock switch sends a charging wake-up signal to a controller and a battery management system;
and S12, after receiving the charging wake-up signal, the controller sends the charging wake-up signal to the instrument, the power conversion module and the power distribution unit.
Preferably, step S1 further includes: after receiving the charging wake-up signal, the battery management system and the power distribution unit perform self-checking, and if the self-checking is free of problems, a main relay and a negative relay are closed; if the self-checking has a problem, the instrument gives an alarm.
Preferably, the locking step in step S2 is performed before the slow charging is started, and the locking step includes:
the charging lock switch is turned to the second gear, and a charging seat locking signal is sent to the controller;
after receiving the locking signal of the charging seat, the controller controls the vehicle-mounted charger to drive the H bridge to be locked;
after the vehicle-mounted charger is locked successfully, the vehicle-mounted charger sends a locking feedback signal, the controller detects the locking feedback signal, if the controller does not receive the locking feedback signal, the instrument gives an alarm, and if the controller receives the locking feedback signal, the slow charging stage is started.
Preferably, the slow charging in step S2 includes:
the controller controls a slow charging relay in the power distribution unit to be closed to start slow charging;
when the SOC charging signal of the battery terminal reaches 100%, the controller controls the slow charging relay to be switched off.
Preferably, after the slow charging in step S2 is started, unlocking is required, and the unlocking includes:
the charging lock switch is clicked to the second gear, an unlocking signal is sent to the controller, and the controller controls the vehicle-mounted charger to drive the H bridge to be unlocked after receiving the unlocking signal;
after unlocking is successful, the vehicle-mounted charger sends an unlocking feedback signal, the controller detects the unlocking feedback signal, if the controller does not receive the unlocking feedback signal, the instrument gives an alarm, if the controller receives the unlocking feedback signal, the charging gun is pulled out, and slow charging is finished.
Preferably, if the charging needs to be interrupted before the SOC charging signal of the battery terminal reaches 100%, the unlocking further includes: and the charging lock switch is clicked to the second gear, the controller controls a slow charging relay in the power distribution unit to be disconnected, and then the controller controls the vehicle-mounted charger to drive the H bridge to be unlocked.
Preferably, the fast charging in step S2 includes:
the charging lock switch is clicked to the second gear, and the controller controls a quick charging relay in the power distribution unit to be closed;
and when the SOC charging signal of the battery terminal reaches 100%, the controller controls the quick charging relay to be switched off.
Preferably, if the charging is to be interrupted before the SOC charging signal of the battery terminal reaches 100%, the charging lock switch is turned to the second gear, and the controller controls the quick charging relay to be turned off.
Preferably, after the quick charge relay is disconnected, the battery management system controls the main and negative relays to be disconnected, and the quick charge is finished.
The invention has the beneficial effects that: by setting the charging lock switch, the charging gun can provide power for other equipment in the charging system to be charged and awakened under the condition that an auxiliary power supply is not prepared; by combining the functions of the charging lock switch, the charging logic during quick charging and slow charging is optimized, and the risk avoidance in the charging operation process can be realized; personnel's operation is safe simple more, and when the lock switch second gear that charges was not touched, it can't be connected with the charging seat to fill the rifle slowly, fills the rifle soon and also can not charge the flow, and is safer even insert the charging seat.
Drawings
FIG. 1 is an electrical schematic diagram of the interior of a charge lock switch provided by the present invention;
FIG. 2 is a flow chart of a method for controlling slow charging of an electric excavator according to the present invention;
fig. 3 is a flowchart of a method for controlling quick charging of an electric excavator according to the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The electric excavator comprises two charging modes, wherein one mode is quick charging, namely charging pile charging and direct-current charging gun configuration, the other mode is slow charging, namely charging is carried out by a vehicle-mounted charger, and national standard or European standard charging guns are configured.
The embodiment provides a control method for charging of an electric excavator, which is characterized in that a charging lock switch is used for realizing quick charging and slow charging, wherein the charging lock switch is a two-point-shift inching type rocker switch and is provided with a first shift and a second shift, an internal electrical schematic diagram of the charging lock switch is shown in fig. 1 and comprises seven pins which are shared by six pins: the No. 1 pin and the No. 7 pin are power-in ends of the fuse box and provide 12V normal power for the charging lock switch; the No. 3 pin is an electric signal output end of the charging lock switch during charging awakening, when the charging lock switch is shifted to a first gear and jogged to a second gear, the loop is switched on, and the electric signal is output to a controller (VCU) and a Battery Management System (BMS) for charging awakening; the No. 4 pin is a locking/unlocking electric signal output end of the charging seat, and when the charging lock switch clicks a second gear, the loop is switched on and outputs an electric signal to a controller (VCU); the No. 5 pin is connected with the No. 4 pin in parallel, when the charge lock switch is turned to a second gear, the No. 4 pin is connected to be electrified, the No. 5 pin is also electrified, and power is supplied to the light-emitting diode corresponding to the second gear; the No. 6 pin is a grounding end of a charging lock switch; the No. 2 pin is a 0-gear OFF loop, and in the process of controlling the charging lock switch, the 0 gear is in an OFF state, so that no No. 2 pin is vacant and is not connected.
By applying the charging lock switch, the method for controlling charging of the electric excavator provided by the embodiment includes:
s1, the charging lock switch is shifted to a first gear, and other equipment in the charging system can be charged and awakened;
and S2, the charging lock switch is clicked to the second gear, and slow charging or quick charging can be started.
Specifically, step S1 includes:
s11, the charging lock switch sends a charging wake-up signal to the controller and the battery management system;
and S12, after receiving the charging wake-up signal, the controller sends the charging wake-up signal to the instrument, the power conversion module and the power distribution unit.
The awakening stage is completed, the storage battery feed phenomenon caused by long-time charging is avoided, any redundant cost is not increased, and the multifunctional charging gun is suitable for various charging guns.
The slow charging mode and the fast charging mode are respectively described below.
A flow chart of the slow charging control method is shown in fig. 2, and the specific steps include:
dial the lock switch that charges to first gear, on-vehicle charger (OBC) begins to detect charge signal (CC CP), detect promptly and charge rifle charged state and whether the rifle that charges is connected with the charging seat, the signal of charging confirms the back of receiving, Power Distribution Unit (PDU) and Battery Management System (BMS) begin the self-checking, judge whether adhesion of main burden relay in Power Distribution Unit (PDU), if find adhesion phenomenon can send alarm signal to the instrument, show that alarm content can't charge by the instrument, closed main burden relay when main burden relay does not have the adhesion.
The charging lock switch is switched to a second gear, a charging seat locking signal is sent to a controller (VCU), and after the controller (VCU) receives the locking signal, an on-board charger (OBC) is controlled to drive an H bridge to be locked; after the locking is successful, the on-board charger (OBC) sends out a locking feedback signal, the controller (VCU) detects the locking feedback signal, if the controller (VCU) does not receive the locking feedback signal, the instrument alarms, and if the controller (VCU) receives the locking feedback signal, the controller (VCU) controls a slow charging relay in a Power Distribution Unit (PDU) to be closed to start charging.
If the charging process is required, if the charging is required to be interrupted, the second gear needs to be clicked, the charging lock switch sends an unlocking signal to the controller (VCU), the controller (VCU) sends a message to a Battery Management System (BMS) through CAN (controller area network) line communication after receiving the unlocking signal to stop charging, the slow charging relay is disconnected, meanwhile, the controller (VCU) controls the vehicle-mounted charger (OBC) to drive the H bridge to be unlocked, after the unlocking is successful, the vehicle-mounted charger (OBC) sends an unlocking feedback signal, the controller (VCU) detects the unlocking feedback signal, if the controller (VCU) does not receive the unlocking feedback signal, the instrument alarms, if the controller (VCU) receives the unlocking feedback signal, the charging gun is pulled out, and the slow charging is finished; if the charging process is not interrupted, the controller (VCU) controls the slow charging relay to be disconnected when the SOC charging signal of the battery end reaches 100%, then the second gear is clicked, an unlocking signal is sent to the controller (VCU), after the controller (VCU) receives the unlocking signal, the controller (VCU) controls the vehicle-mounted charger (OBC) to drive the H bridge to be unlocked, similarly, after the unlocking is successful, the vehicle-mounted charger (OBC) sends an unlocking feedback signal, the controller (VCU) detects the unlocking feedback signal, if the controller (VCU) does not receive the unlocking feedback signal, the instrument alarms, if the controller (VCU) receives the unlocking feedback signal, the charging gun is pulled out, and the slow charging is finished.
A flow chart of the rapid charging control method is shown in fig. 3, and the specific steps include:
dial the lock switch that will charge to first gear, Battery Management System (BMS) begin to detect charge signal (CC), detect the rifle charged state promptly that charges, the signal of charging confirms the back of receiving, Power Distribution Unit (PDU) and Battery Management System (BMS) begin the self-checking, judge whether adhesion of main burden relay in Power Distribution Unit (PDU), if find adhesion phenomenon can send alarm signal to the instrument, show that alarm content can't charge by the instrument, closed main burden relay when main burden relay does not have the adhesion.
And (3) the charging lock switch is switched to a second gear, and the controller (VCU) controls a quick charging relay in the Power Distribution Unit (PDU) to be closed to start charging.
If the charging process is required, if the charging is required to be interrupted, the second gear needs to be clicked, the charging lock switch sends an unlocking signal to the controller (VCU), the controller (VCU) sends a message to a Battery Management System (BMS) through CAN (controller area network) line communication after receiving the unlocking signal to stop charging, and a quick charging relay is disconnected, the Battery Management System (BMS) disconnects a main negative relay after receiving the message, and pulls out a charging gun to finish quick charging; if the charging process is not interrupted, the controller (VCU) controls the quick charging relay to be disconnected when the SOC charging signal of the battery end reaches 100%, the Battery Management System (BMS) disconnects the main relay and the negative relay after receiving the signal that the controller (VCU) disconnects the quick charging relay, the charging gun is pulled out, and the quick charging is finished.
The method for controlling charging of the electric excavator provided by the embodiment can realize that the charging gun provides power for other equipment in the charging system to wake up during charging without being provided with an auxiliary power supply; the charging logic is optimized when the functions of the charging lock switch are combined for quick charging and slow charging, so that the risk avoidance in the charging operation process can be realized; personnel's operation is safe simple more, and when the lock switch second gear that charges was not touched, it can't be connected with the charging seat to fill the rifle slowly, fills the rifle soon and also can not charge the flow, and is safer even insert the charging seat.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A method for controlling charging of an electric excavator is characterized in that quick charging and slow charging are achieved through a charging lock switch, the charging lock switch is provided with a first gear and a second gear, and the method comprises the following steps:
s1, the charging lock switch is turned to the first gear, and other equipment in the charging system can be charged and awakened;
and S2, the charging lock switch is clicked to the second gear, and slow charging or quick charging can be started.
2. The method for controlling charging of an electric excavator according to claim 1, wherein step S1 includes:
s11, the charging lock switch sends a charging wake-up signal to a controller and a battery management system;
and S12, after receiving the charging wake-up signal, the controller sends the charging wake-up signal to the instrument, the power conversion module and the power distribution unit.
3. The method for controlling charging of an electric excavator according to claim 2, wherein step S1 further includes: after receiving the charging wake-up signal, the battery management system and the power distribution unit perform self-checking, and if the self-checking is free of problems, a main relay and a negative relay are closed; if the self-checking has a problem, the instrument gives an alarm.
4. The method for controlling charging of an electric shovel according to claim 1, wherein locking is required before slow charging in step S2, and the locking step includes:
the charging lock switch is turned to the second gear, and a charging seat locking signal is sent to the controller;
after receiving the locking signal of the charging seat, the controller controls the vehicle-mounted charger to drive the H bridge to be locked;
after the vehicle-mounted charger is locked successfully, the vehicle-mounted charger sends a locking feedback signal, the controller detects the locking feedback signal, if the controller does not receive the locking feedback signal, the instrument gives an alarm, and if the controller receives the locking feedback signal, a slow charging stage is started.
5. The method for controlling charging of an electric shovel according to claim 4, wherein the slow charging in step S2 includes:
the controller controls a slow charging relay in the power distribution unit to be closed to start slow charging;
when the SOC charging signal of the battery terminal reaches 100%, the controller controls the slow charging relay to be switched off.
6. The method of claim 5, wherein unlocking is required after the slow charging in step S2, and the unlocking comprises:
the charging lock switch is clicked to the second gear, an unlocking signal is sent to the controller, and the controller controls the vehicle-mounted charger to drive the H bridge to be unlocked after receiving the unlocking signal;
after unlocking is successful, the vehicle-mounted charger sends an unlocking feedback signal, the controller detects the unlocking feedback signal, if the controller does not receive the unlocking feedback signal, the instrument gives an alarm, if the controller receives the unlocking feedback signal, the charging gun is pulled out, and slow charging is finished.
7. The method of claim 6, wherein if the charging is interrupted before the SOC charging signal of the battery reaches 100%, the unlocking further comprises: and the charging lock switch is clicked to the second gear, the controller controls a slow charging relay in the power distribution unit to be disconnected, and then the controller controls the vehicle-mounted charger to drive the H bridge to be unlocked.
8. The method for controlling charging of an electric excavator according to claim 1, wherein the quick charging in step S2 includes:
the charging lock switch is clicked to the second gear, and the controller controls a quick charging relay in the power distribution unit to be closed;
and when the SOC charging signal of the battery terminal reaches 100%, the controller controls the quick charging relay to be switched off.
9. The method of claim 8, wherein if the charging is interrupted before the SOC charging signal of the battery reaches 100%, the charging lock switch is tripped to the second gear, and the controller controls the quick charging relay to be turned off.
10. The method of claim 9, wherein after the fast charge relay is turned off, the battery management system controls the main and negative relays to be turned off, and the fast charge is terminated.
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| CN202111521023.3A CN114084001B (en) | 2021-12-13 | 2021-12-13 | Charging control method for electric excavator |
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| CN112406616A (en) * | 2020-11-26 | 2021-02-26 | 东风汽车集团有限公司 | Quick charging method of battery management system with safety function |
| CN113733964A (en) * | 2021-09-13 | 2021-12-03 | 东风汽车股份有限公司 | Control method of vehicle-mounted charger of pure electric vehicle |
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