CN114084001B - Charging control method for electric excavator - Google Patents
Charging control method for electric excavator Download PDFInfo
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- CN114084001B CN114084001B CN202111521023.3A CN202111521023A CN114084001B CN 114084001 B CN114084001 B CN 114084001B CN 202111521023 A CN202111521023 A CN 202111521023A CN 114084001 B CN114084001 B CN 114084001B
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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 of 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 method comprises the following steps: s1, a charging lock switch is shifted to a first gear, so that other equipment in a charging system can be charged and awakened; s2, the charging lock switch is turned to the second gear, and slow charging or fast charging can be started. According to the invention, by setting the charging lock switch, the charging gun can provide power for other equipment in the charging system to perform charging awakening under the condition that the charging gun is not provided with an auxiliary power supply; by combining the functions of the charging lock switch, the charging logic during quick charging and slow charging is also optimized, so that risk avoidance in the charging operation process can be realized; the personnel operation is safer simple, when the second gear of the charging lock switch is not driven, the slow charging gun cannot be connected with the charging seat, and the quick charging gun cannot carry out a charging flow even if inserted into the charging seat, so that the charging system is safer.
Description
Technical Field
The invention relates to the technical field of electric excavators, in particular to a control method for charging of 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 working system, and the electric excavator based on the high-voltage working system can be directly provided with an existing standard charging gun and charging seat, but the electric excavator based on the low-voltage working system has the advantages in consideration of the safety of assembly and maintenance.
The electric excavator of the low-voltage working system is required to be provided with a high-current direct-current charging gun, but the high-current direct-current charging gun is not provided with an auxiliary power supply in the market at present, so that the low-voltage charging equipment cannot be charged and awakened, an electronic lock is not provided, and great potential safety hazards exist during operation.
Disclosure of Invention
The invention aims to provide a control method for charging an electric excavator, which is safe and reliable and avoids risks caused by improper operation by providing charging awakening for a charging gun without an auxiliary power supply.
To achieve the purpose, the invention adopts the following technical scheme:
the method for controlling the charging of the electric excavator utilizes a charging lock switch to realize quick charging and slow charging, the charging lock switch is provided with a first gear and a second gear, and the method comprises the following steps:
s1, dialing the charging lock switch to the first gear, and enabling other devices in a charging system to be charged and awakened;
s2, the charging lock switch is moved to the second gear, and slow charging or fast charging can be started.
Preferably, 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.
Preferably, step S1 further includes: after the battery management system and the power supply distribution unit receive the charging wake-up signal, self-checking is carried out, and if the self-checking is free of problems, the main negative relay is closed; and if the self-checking is problematic, the instrument alarms.
Preferably, the locking is required before the slow charge in step S2, and the locking step includes:
the charging lock switch is moved 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 lock;
after the locking is successful, the vehicle-mounted charger sends out a locking feedback signal, the controller detects the locking feedback signal, if the controller does not receive the locking feedback signal, the instrument alarms, and if the controller receives the locking feedback signal, the controller enters the slow charging stage.
Preferably, the slow charge in step S2 includes:
the controller controls a slow charging relay in the power distribution unit to be closed, and slow charging is started;
and when the SOC charging signal of the battery end reaches 100%, the controller controls the slow charging relay to be disconnected.
Preferably, in step S2, unlocking is required after the slow charge is started, and the unlocking includes:
the charging lock switch is moved 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 unlock after receiving the unlocking signal;
after the 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 alarms, if the controller receives the unlocking feedback signal, the charging gun is pulled out, and the slow charging is finished.
Preferably, if the charging needs to be interrupted before the SOC charging signal at the battery end reaches 100%, the unlocking further includes: and the charging lock switch is moved 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 quick charge in step S2 includes:
the charging lock switch is turned 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 end reaches 100%, the controller controls the quick charging relay to be disconnected.
Preferably, if the charging is to be interrupted before the SOC charging signal at the battery end reaches 100%, the charging lock switch is turned to the second gear, and the controller controls the fast charging relay to be turned off.
Preferably, after the fast charging relay is disconnected, the battery management system controls the main negative relay to be disconnected, and the fast charging 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 wake up in a charging way under the condition that the auxiliary power supply is not provided; by combining the functions of the charging lock switch, the charging logic during quick charging and slow charging is also optimized, so that risk avoidance in the charging operation process can be realized; the personnel operation is safer simple, when the second gear of the charging lock switch is not driven, the slow charging gun cannot be connected with the charging seat, and the quick charging gun cannot carry out a charging flow even if inserted into the charging seat, so that the charging system is safer.
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 the electric excavator slow charge control method provided by the invention;
fig. 3 is a flowchart of the quick charge control method of the electric excavator provided by the invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The electric excavator comprises two charging modes, namely quick charging, namely charging pile charging, a direct-current charging gun is arranged, and slow charging, namely vehicle-mounted charger charging, and a national standard or European standard charging gun is arranged.
The embodiment provides a control method for charging an electric excavator, which utilizes a charging lock switch to realize quick charging and slow charging, wherein the charging lock switch is a two-point gear point type rocker switch, and has a first gear and a second gear, an internal electrical schematic diagram of the charging lock switch is shown in fig. 1, and the charging lock switch comprises seven pins and six pins: the pin 1 and the pin 7 are the power-on ends of the fuse box and provide 12V normal power for the charging lock switch; the pin 3 is an electric signal output end of the charging lock switch when the charging lock switch wakes up in charging, when the charging lock switch dials to a first gear and moves to a second gear, the circuit is connected, and the electric signal is output to a controller (VCU) and a Battery Management System (BMS) for waking up in charging; the pin 4 is a locking/unlocking electric signal output end of the charging seat, and when the charging lock switch is used for clicking the second gear, the loop is connected and an electric signal is output to a controller (VCU); the pin 5 is connected with the pin 4 in parallel, when the charging lock switch is turned on to the second gear, the pin 4 is connected to obtain electricity, and the pin 5 is also connected to obtain electricity to supply power for the light emitting diode corresponding to the second gear; the pin 6 is the grounding end of the charging lock switch; the No. 2 pin is a 0-gear OFF loop, and in the current charging lock switch control process, the 0-gear is in a closed state, so that no No. 2 pin is empty and not connected.
The method for controlling the charging of the electric excavator provided by the embodiment comprises the following steps of:
s1, a charging lock switch is shifted to a first gear, so that other equipment in a charging system can be charged and awakened;
s2, the charging lock switch is turned to the second gear, and slow charging or fast charging can be started.
Specifically, step S1 includes:
s11, a 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.
The wake-up stage is completed, the feeding phenomenon of the storage battery caused by long-time charging is avoided, any extra cost is not increased, and the device is applicable to various charging guns.
The two charging modes of slow charging and fast charging are described below.
The flow chart of the slow charge control method is shown in fig. 2, and the specific steps include:
the charging lock switch is shifted to a first gear, the vehicle-mounted charger (OBC) starts to detect a charging signal (CC/CP), namely, the charging state of the charging gun and whether the charging gun is connected with the charging seat are detected, after the charging signal is confirmed and received, the Power Distribution Unit (PDU) and the Battery Management System (BMS) start self-checking, whether the main negative relay in the Power Distribution Unit (PDU) is adhered or not is judged, if the adhesion phenomenon is found, an alarm signal can be sent to the instrument, the instrument displays alarm content and cannot be charged, and when the main negative relay is not adhered, the main negative relay is closed.
Dialing a charging lock switch to a second gear, sending a charging seat locking signal to a controller (VCU), and controlling an on-board charger (OBC) to drive an H bridge to lock after the controller (VCU) receives the locking signal; after the locking is successful, the vehicle-mounted 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 the Power Distribution Unit (PDU) to be closed, and charging is started.
If the charging process is needed to be interrupted, a second gear is needed to be clicked, a charging lock switch sends an unlocking signal to a controller (VCU), the controller (VCU) sends a message to a Battery Management System (BMS) to stop charging through CAN line communication after receiving the unlocking signal, and a slow charging relay is disconnected, meanwhile, the controller (VCU) controls an on-board charger (OBC) to drive an H bridge to unlock, after the unlocking is successful, the on-board 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, an instrument alarms, if the controller (VCU) receives the unlocking feedback signal, a 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 at the battery end reaches 100%, then the second gear is clicked, an unlocking signal is sent to the controller (VCU), the controller (VCU) controls the vehicle-mounted charger (OBC) to drive the H bridge to unlock after receiving the unlocking signal, similarly, the vehicle-mounted charger (OBC) sends an unlocking feedback signal after successful unlocking, the controller (VCU) detects the unlocking feedback signal, if the controller (VCU) does not receive the unlocking feedback signal, the instrument alarms, and if the controller (VCU) receives the unlocking feedback signal, the charging gun is pulled out, and slow charging is finished.
The flow chart of the quick charge control method is shown in fig. 3, and the specific steps include:
the charging lock switch is shifted to a first gear, the Battery Management System (BMS) starts to detect a charging signal (CC), namely, the charging state of the charging gun is detected, after the charging signal is confirmed and received, the Power Distribution Unit (PDU) and the Battery Management System (BMS) start to perform self-checking, whether the main negative relay in the Power Distribution Unit (PDU) is adhered or not is judged, if the adhesion phenomenon is found, an alarm signal can be sent to the instrument, the instrument displays alarm content, the charging cannot be performed, and when the main negative relay is not adhered, the main negative relay is closed.
The charging lock switch is shifted to a second gear, and the controller (VCU) controls a fast charging relay in the Power Distribution Unit (PDU) to be closed, so that charging is started.
If the charging process is needed to be interrupted, a second gear is needed to be clicked, a charging lock switch sends an unlocking signal to a controller (VCU), the controller (VCU) sends a message to a Battery Management System (BMS) through CAN line communication after receiving the unlocking signal to stop charging, a fast charging relay is disconnected, a main negative relay is disconnected after the Battery Management System (BMS) receives the message, and a charging gun is pulled out to finish fast 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%, and the Battery Management System (BMS) receives the signal of the controller (VCU) for disconnecting the quick charging relay and then disconnects the main negative relay, the charging gun is pulled out, and the quick charging is finished.
The control method for charging the electric excavator can realize that the charging gun provides power for other equipment in a charging system to carry out charging awakening in the charging process under the condition that an auxiliary power supply is not provided; the charging logic during the fast charging and the slow charging combined with the functions of the charging lock switch is also optimized, so that the risk avoidance in the charging operation process can be realized; the personnel operation is safer simple, when the second gear of the charging lock switch is not driven, the slow charging gun cannot be connected with the charging seat, and the quick charging gun cannot carry out a charging flow even if inserted into the charging seat, so that the charging system is safer.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. The method for controlling the charging of the electric excavator is characterized in that the quick charging and the slow charging are realized by using 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, dialing the charging lock switch to the first gear, and enabling other devices in a charging system to be charged and awakened;
s2, the charging lock switch is moved to the second gear, and slow charging or fast charging can be started;
the locking is needed before the slow charging in the step S2, and the locking step includes:
the charging lock switch is moved 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 lock;
after the locking is successful, the vehicle-mounted charger sends out a locking feedback signal, the controller detects the locking feedback signal, if the controller does not receive the locking feedback signal, the instrument alarms, and if the controller receives the locking feedback signal, the controller enters a slow charging stage.
2. The method of controlling the 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 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.
3. The method of controlling the charging of an electric excavator according to claim 2, wherein step S1 further comprises: after the battery management system and the power supply distribution unit receive the charging wake-up signal, self-checking is carried out, and if the self-checking is free of problems, the main negative relay is closed; and if the self-checking is problematic, the instrument alarms.
4. The method of controlling charging of an electric excavator according to claim 1, wherein the slow charging in step S2 includes:
the controller controls a slow charging relay in the power distribution unit to be closed, and slow charging is started;
and when the SOC charging signal of the battery end reaches 100%, the controller controls the slow charging relay to be disconnected.
5. The method according to claim 4, wherein the unlocking is required after the slow charging in step S2, and the unlocking includes:
the charging lock switch is moved 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 unlock after receiving the unlocking signal;
after the 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 alarms, if the controller receives the unlocking feedback signal, the charging gun is pulled out, and the slow charging is finished.
6. The method according to claim 5, wherein if the battery-side SOC charging signal reaches 100%, the charging is to be interrupted, the unlocking further comprises: and the charging lock switch is moved 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.
7. The method of controlling charging of an electric excavator according to claim 1, wherein the quick charging in step S2 includes:
the charging lock switch is turned 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 end reaches 100%, the controller controls the quick charging relay to be disconnected.
8. The method according to claim 7, wherein the controller controls the quick charge relay to be turned off by turning the charge lock switch to the second gear if the charge is to be interrupted before the battery-side SOC charge signal reaches 100%.
9. The method according to claim 8, wherein the battery management system controls the main negative relay to be turned off after the quick charge relay is turned off, and the quick charge is ended.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111521023.3A CN114084001B (en) | 2021-12-13 | 2021-12-13 | Charging control method for electric excavator |
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| CN202111521023.3A CN114084001B (en) | 2021-12-13 | 2021-12-13 | Charging control method for electric excavator |
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| CN114084001A (en) | 2022-02-25 |
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