CN113859006A - Electric automobile soft queuing charging system and control method thereof - Google Patents

Electric automobile soft queuing charging system and control method thereof Download PDF

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Publication number
CN113859006A
CN113859006A CN202111047189.6A CN202111047189A CN113859006A CN 113859006 A CN113859006 A CN 113859006A CN 202111047189 A CN202111047189 A CN 202111047189A CN 113859006 A CN113859006 A CN 113859006A
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China
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charging
power
intelligent charging
charging pile
electrically connected
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CN202111047189.6A
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Chinese (zh)
Inventor
陈达伟
黎灿兵
魏娟
曾龙
杨函煜
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Priority to CN202111047189.6A priority Critical patent/CN113859006A/en
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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
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • 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
    • 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
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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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  • 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 provides an electric automobile soft queuing charging system and a control method thereof, wherein the electric automobile soft queuing charging system comprises: the intelligent charging system comprises a master control cabinet, a power bus and a plurality of intelligent charging piles; the power bus is electrically connected with the intelligent charging pile; the master control cabinet comprises a master controller, a grid-connected circuit breaker and a first information acquisition module, wherein one end of the grid-connected circuit breaker is electrically connected with a feeder line in a power grid, and the other end of the grid-connected circuit breaker is electrically connected with a power bus; the first information acquisition module is used for acquiring the electric quantity information of the power grid flowing to the power bus; the master controller is respectively and electrically connected with the intelligent charging pile, the control signal end of the grid-connected circuit breaker and the output end of the first information acquisition module; the main controller is used for controlling the real-time output power of each intelligent charging pile, and the sum of the real-time output power of each intelligent charging pile is smaller than or equal to the maximum transmission power of the feeder line in the control process. The intelligent charging pile can increase the number of the intelligent charging piles on the premise of ensuring that a feeder line is not overloaded, and the win-win situation of electric vehicle users and a power grid is realized.

Description

Electric automobile soft queuing charging system and control method thereof
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to an electric automobile soft queuing charging system and a control method thereof.
Background
The vigorous development and popularization of electric automobiles are important ways for solving the problems of environmental pollution and oil crisis and realizing an energy strategy and a sustainable development strategy. The electric automobile has the characteristics of zero emission or ultralow emission, low noise, low heat radiation and the like in the use process, and meanwhile, the electric energy source is more and more diversified and clean, so that the electric automobile with the characteristics of energy conservation and environmental protection is generally considered as an ideal fuel automobile substitute by the society under the dual constraints of resources and environment. With the enhancement of the related technologies of electric vehicles and the support of national policies, the market scale of electric vehicles is gradually increased.
However, the popularity of electric vehicles is severely hampered by imperfections in the electric vehicle charging facility network. In the charging pile planning stage, the sum of the maximum powers of all charging piles on a certain feeder line is generally required to be smaller than the maximum transmission power of the feeder line. Therefore, in urban areas with large electric vehicle charging demands, such as residential districts, office buildings, shopping malls and the like, the number of electric vehicle charging piles is limited by the capacity of the established feeder line of the distribution network. The phenomenon that the quantity of the charging piles is not enough is often caused in the charging peak period, a user can only queue for the vehicles which are accessed in front to finish charging, and the experience of the user in using the electric automobile is greatly influenced. In addition, concentrated charging also can cause the feeder to last the heavy load during the peak period of charging, and last the light load during the idle period of charging, greatly reduced the utilization ratio of equipment, be unfavorable for joining in marriage the economic operation of net.
At present, for the charging problem of the electric automobile, some prior arts exist, such as application numbers: 202020946943.4 and application No. 201910805104.2, however, these prior arts are all around the charging demands of fast charging or slow charging, so as to effectively improve the charging efficiency, and do not consider the situation of insufficient charging pile quantity, and cannot solve the problem that users queue up to wait for charging pile.
Disclosure of Invention
The invention provides a soft queuing charging system for an electric automobile and a control method thereof, and aims to solve the problems that the number of charging piles is insufficient, electric automobile users need to queue for idle charging piles, and a feeder line cannot be overloaded.
In order to achieve the above object, an embodiment of the present invention provides a soft queuing charging system for an electric vehicle, including: the intelligent charging system comprises a master control cabinet, a power bus and a plurality of intelligent charging piles;
the power bus is electrically connected with the intelligent charging pile; the master control cabinet comprises a master controller, a grid-connected circuit breaker and a first information acquisition module, wherein one end of the grid-connected circuit breaker is electrically connected with a feeder in a power grid, and the other end of the grid-connected circuit breaker is electrically connected with the power bus; the first information acquisition module is used for acquiring the electric quantity information of the power grid flowing to the power bus; the master controller is respectively and electrically connected with the intelligent charging pile, the control signal end of the grid-connected circuit breaker and the output end of the first information acquisition module;
the total controller is used for controlling the real-time output power of each intelligent charging pile, and the sum of the real-time output power of each intelligent charging pile is smaller than or equal to the maximum transmission power of the feeder line in the control process.
Wherein, intelligent charging stake includes: the distributed controller, the inverter module and the second information acquisition module;
the input end of the inverter module is electrically connected with the power bus, and the second information acquisition module is used for acquiring output information of the intelligent charging pile to which the second information acquisition module belongs; the distributed controller is electrically connected with the master controller, the control signal end of the inverter module and the output end of the second information acquisition module respectively.
The distributed controller is electrically connected with a battery management system of the electric automobile charged through the intelligent charging pile to which the distributed controller belongs.
The master controller comprises a cloud wireless communication module and a first local wireless communication module;
the general controller is electrically connected with a cloud server through the cloud wireless communication module, and the general controller is electrically connected with the intelligent charging pile through the first local wireless communication module.
The master controller further comprises a first display module.
Wherein the distributed controller comprises a second local wireless communication module; the distributed controller is electrically connected with the master controller through the second local wireless communication module.
Wherein the distributed controller comprises a user interaction module.
Wherein the distributed controller comprises a second display module.
The embodiment of the invention also provides a control method of the electric automobile soft queuing charging system, which is applied to the electric automobile soft queuing charging system, and the control method comprises the following steps:
when a charging request sent by a target intelligent charging pile is received, inquiring the sum of real-time output power of all intelligent charging piles currently charging the electric automobile in the electric automobile soft queuing charging system through a master controller; the charging request carries the maximum charging power of the target intelligent charging pile;
judging whether the sum of the inquired real-time output power and the maximum charging power is smaller than or equal to the maximum transmission power of a feeder line electrically connected with a grid-connected circuit breaker in a power grid;
when the sum is smaller than or equal to the maximum transmission power of the feeder line, sending a charging permission instruction to the target intelligent charging pile through a master controller, so that the target intelligent charging pile starts to charge the electric automobile;
when the sum is larger than the maximum transmission power of the feeder line, the total controller adjusts the real-time output power of all the intelligent charging piles currently charging the electric automobile until the sum of the real-time output power of all the intelligent charging piles currently charging the electric automobile and the sum of the maximum charging power are smaller than or equal to the maximum transmission power of the feeder line, and the total controller sends a charging permission instruction to the target intelligent charging pile to enable the target intelligent charging pile to start charging the electric automobile.
The scheme of the invention has the following beneficial effects:
in an embodiment of the present invention, an electric vehicle soft queue charging system includes: the intelligent charging system comprises a master control cabinet, a power bus and a plurality of intelligent charging piles; one end of the grid-connected circuit breaker is electrically connected with a feeder line in a power grid, the other end of the grid-connected circuit breaker is electrically connected with the power bus, the power bus is electrically connected with each intelligent charging pile, the first information acquisition module acquires electric quantity information (including information such as total power, voltage and current) flowing to the power bus of the power grid and outputs the electric quantity information to the master controller, and the master controller is electrically connected with each intelligent charging pile, a control signal end of the grid-connected circuit breaker and an output end of the first information acquisition module respectively. The electric vehicle soft queuing charging system uniformly controls the real-time output power of each intelligent charging pile through the master controller, and the sum of the real-time output power of each intelligent charging pile is less than or equal to the maximum transmission power of the feeder line in the control process, so that the number of the intelligent charging piles is increased on the premise of ensuring that the feeder line is not overloaded, and the win-win situation of electric vehicle users and a power grid is realized.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an electric vehicle soft queuing charging system in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an overall controller in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a distributed controller according to an embodiment of the present invention;
FIG. 4 is a flowchart of a control method of the electric vehicle soft queue charging system according to the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the 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.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The embodiment of the invention aims to solve the problem of contradiction between supply and demand of a charging pile caused by uneven distribution of charging demands of an electric automobile in time, and mainly comprises the following steps: under a specific scene, such as commuting on duty and off duty, the charging requirements of the electric automobile are mainly concentrated in a certain period of time, so that the parking spaces of the charging piles are tense, and users can only wait in a passive queue; the planning of the number of charging piles is limited by the maximum transmission power of the feeder line, because the power supply company needs to ensure that the total charging power is less than the maximum transmission power of the feeder line under extreme conditions (i.e., all charging piles are charged).
Specifically, as shown in fig. 1, an embodiment of the present invention provides an electric vehicle soft queuing charging system, which includes: total control cabinet 1, power bus 2 and a plurality of intelligent charging stake 3.
The power bus 2 is electrically connected with the intelligent charging pile 3; the master control cabinet 1 comprises a master controller 11, a grid-connected circuit breaker 12 and a first information acquisition module 13, wherein one end of the grid-connected circuit breaker 12 is electrically connected with a feeder 4 in a power grid, and the other end of the grid-connected circuit breaker 12 is electrically connected with a power bus 2; the first information acquisition module 13 is configured to acquire information (including information such as total power, voltage, and current) of electric quantity flowing to the power bus 2 by the power grid; the master controller 11 is respectively and electrically connected with the intelligent charging pile 3, the control signal end of the grid-connected circuit breaker 12 and the output end of the first information acquisition module 13; the master controller 11 is configured to control the real-time output power of each intelligent charging pile 3, and the sum of the real-time output powers of the intelligent charging piles 3 is less than or equal to the maximum transmission power of the feeder line in the control process.
In the embodiment of the invention, the power bus receives power from a power grid and transmits the power to each intelligent charging pile; the main controller keeps communicating with each intelligent charging pile, and the real-time output power of each intelligent charging pile is controlled by combining the electric quantity information output by the first information acquisition module so as to ensure that the sum of the real-time output power of each intelligent charging pile is less than or equal to the maximum transmission power of the feeder line.
It should be noted that, in the embodiment of the present invention, in order to achieve that the total rated power of the intelligent charging piles is higher than the maximum transmission capacity of the feeder line, but the total charging power in the actual operation process is not out of limit (that is, the total of the real-time output powers of the intelligent charging piles is less than or equal to the maximum transmission power of the feeder line), for any time point, there are: pGeneral assembly＝∑Pn≤PLineNWherein P isnReal-time charging power (i.e. real-time output power) for the nth intelligent charging pile, PGeneral assemblyFor inputting the total real-time power P of the soft queuing charging system of the electric automobile through the grid-connected circuit breakerLineNThe maximum transmission power of the feeder line for connecting the electric automobile soft queuing charging system is the minimum rated transmission capacity of the electric facility on the feeder line where the electric automobile charging system is located, so that the total charging power of the electric automobile charging system is limited to be not higher than the maximum transmission capacity of the feeder line. Of course, in PGeneral assembly＝∑Pn≤PLineNIf so, can make Σ Pmax,n≥PLineNWherein P ismax,nThe maximum charging power of the nth intelligent charging pile. This formula has removed the restriction of intelligent charging stake planning quantity on certain feeder. Therefore, the electric vehicle soft queuing charging system provided by the embodiment of the invention can be simultaneously accessed to a plurality of electric vehicles, ensures that the total maximum charging power does not exceed the power limit of a feeder line, and realizes a 'soft queuing' mechanism for charging the electric vehicles.
In the embodiment of the invention, the grid-connected circuit breaker can receive the control signal from the master controller and disconnect the connection between the power grid and the electric vehicle soft queuing charging system. It should be noted that, in the embodiment of the present invention, in order to prevent the feeder transmission power from exceeding the maximum limit due to the failure of the electric vehicle soft queuing charging system, which causes accelerated aging or failure of the power equipment, the action threshold of the grid-connected circuit breaker may be set to the maximum transmission power of the feeder in the master controller, so as to ensure that the line is not overloaded.
In an embodiment of the present invention, as shown in fig. 2, the general controller may include a data storage module 1101, a central processing unit 1102, a power supply module 1103, a data interface 1104, a first display module 1105 (the first display module may display states of the electric vehicle soft queuing charging system, such as information of each intelligent charging pile, grid-side information, and the like), a cloud wireless communication module 1106, and a first local wireless communication module 1107; the general controller is connected with cloud server 6 electricity through high in the clouds wireless communication module 1106, and general controller is connected with intelligent charging stake 3 electricity through first local wireless communication module 1107, realizes the communication with intelligent charging stake 3, thereby make general controller possess the demonstration, data upload, data storage, functions such as wireless communication, can upload local information to cloud server 6, also can receive cloud server 6's instruction, realize the remote control to general controller.
In an embodiment of the present invention, as shown in fig. 1, the intelligent charging pile 3 includes: a distributed controller 31, an inverter module 32 and a second information acquisition module 33. The input end of the inverter module 32 is electrically connected to the power bus 2, and the second information acquisition module 33 is configured to acquire output information (including output power, voltage, current signals, and the like) of the intelligent charging pile 3 to which the second information acquisition module 33 belongs; the distributed controller 31 is electrically connected to the master controller 11, the control signal terminal of the inverter module 32, and the output terminal of the second information acquisition module 33.
Specifically, in the embodiment of the present invention, the inverter module is configured to convert the ac power on the feeder line into the dc power to charge the electric vehicle; the second information acquisition module is used for acquiring output power, voltage and current signals of the intelligent charging pile and transmitting the output power, the voltage and the current signals to the distributed controller; the distributed controller is used for adjusting the output power, voltage and current of the inverter module according to the control signal output by the master controller and the information transmitted by the second information acquisition module to form closed-loop control.
As shown in fig. 1, the distributed controller 31 is electrically connected to a battery management system 51 of the electric vehicle 5 charged by the intelligent charging pile 3 to which the distributed controller 31 belongs. That is, the distributed controller 31 may also receive information from a Battery Management System (BMS) of the electric vehicle 5, such as: battery state of charge (SOC) state, maximum charge power limit, etc.
In an embodiment of the present invention, as shown in fig. 3, the distributed controller may include a second local wireless communication module 3101, a user interaction module 3102 (the user interaction module is used to input charging requirement information, such as charging mode, charging time, duration, etc.), a second display module 3103 (the second display module may be used to display information of the intelligent charging pile, and serve a user together with the user interaction module), a data storage module 3104, a central processor 3105, a power supply module 3106, and a data interface 3107; the distributed controller is electrically connected with the master controller 11 through the second local wireless communication module 3101, so that the communication between the intelligent charging pile and the master controller 11 is realized, and the distributed controller has the functions of display, wireless communication, data storage, user interaction and the like.
Therefore, in the embodiment of the invention, the electric vehicle soft queuing charging system uniformly controls the real-time output power of each intelligent charging pile through the master controller, and the sum of the real-time output powers of the intelligent charging piles is less than or equal to the maximum transmission power of the feeder line in the control process, so that the number of the intelligent charging piles is increased on the premise of ensuring that the feeder line is not overloaded, and the win-win situation of electric vehicle users and a power grid is realized.
As shown in fig. 4, an embodiment of the present invention provides a control method for an electric vehicle soft queuing charging system, which is applied to the electric vehicle soft queuing charging system, and the control method includes:
step 401, when a charging request sent by a target intelligent charging pile is received, inquiring the sum of real-time output powers of all intelligent charging piles currently charging the electric automobile in an electric automobile soft queuing charging system through a master controller; and the charging request carries the maximum charging power of the target intelligent charging pile.
The target intelligent charging pile can be any intelligent charging pile in an electric automobile soft queuing charging system. When the electric automobile is connected into the target intelligent charging pile for charging, the target intelligent charging pile can send a charging request.
Step 402, judging whether the sum of the inquired real-time output power and the maximum charging power is less than or equal to the maximum transmission power of a feeder line electrically connected with a grid-connected circuit breaker in a power grid, and executing step 403 when the sum is less than or equal to the maximum transmission power of the feeder line; when the sum is greater than the maximum transmission power of the feeder, step 404 is performed.
And 403, sending a charging permission instruction to the target intelligent charging pile through the master controller, so that the target intelligent charging pile starts to charge the electric automobile.
Specifically, in the embodiment of the present invention, the master controller may send the charging permission instruction to the distributed controller of the target intelligent charging pile, so as to send the charging permission instruction to the target intelligent charging pile.
Step 404, adjusting the real-time output power of all the intelligent charging piles currently charging the electric automobile through the master controller until the sum of the real-time output power of all the intelligent charging piles currently charging the electric automobile and the maximum charging power is less than or equal to the maximum transmission power of the feeder line, and executing step 403.
Specifically, in the embodiment of the present invention, the master controller may issue a down-regulation charging power instruction (the down-regulation charging power instruction may carry a charging power value that needs to be down-regulated) to the distributed controller of the intelligent charging pile that is charging the electric vehicle, so that the distributed controller down-regulates the charging power of the intelligent charging pile according to the down-regulation charging power instruction, and returns the down-regulated real-time charging power (i.e., real-time output power) to the master controller. It should be noted that, after all the distributed controllers return the down-regulated real-time charging power, the master controller may query the sum of the real-time output powers of all the intelligent charging piles currently charging the electric vehicle, and determine whether the sum and the sum of the maximum charging power are less than or equal to the maximum transmission power of the feeder line, if so, execute the step of sending a charging permission instruction to the target intelligent charging pile through the master controller, so that the target intelligent charging pile starts charging the electric vehicle, otherwise, repeat the process of down-regulating the charging power until the sum of the real-time output powers of all the intelligent charging piles currently charging the electric vehicle and the sum of the maximum charging power are less than or equal to the maximum transmission power of the feeder line.
Therefore, in the embodiment of the invention, the output power of each intelligent charging pile is limited by the main controller, so that the number of the charging piles is increased, the number of electric vehicles simultaneously charged on the feeder line is increased, but the limit of the maximum transmission capacity of the feeder line is not exceeded, the problem of contradiction between supply and demand of the charging piles is solved, soft queuing for charging the electric vehicles is realized, users are prevented from waiting for the idle charging piles in a queuing mode, and the user experience of the electric vehicles is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (9)

1. The utility model provides an electric automobile soft queuing charging system which characterized in that includes: the intelligent charging system comprises a master control cabinet, a power bus and a plurality of intelligent charging piles;
the power bus is electrically connected with the intelligent charging pile; the master control cabinet comprises a master controller, a grid-connected circuit breaker and a first information acquisition module, wherein one end of the grid-connected circuit breaker is electrically connected with a feeder in a power grid, and the other end of the grid-connected circuit breaker is electrically connected with the power bus; the first information acquisition module is used for acquiring the electric quantity information of the power grid flowing to the power bus; the master controller is respectively and electrically connected with the intelligent charging pile, the control signal end of the grid-connected circuit breaker and the output end of the first information acquisition module;
the total controller is used for controlling the real-time output power of each intelligent charging pile, and the sum of the real-time output power of each intelligent charging pile is smaller than or equal to the maximum transmission power of the feeder line in the control process.
2. The electric vehicle soft queue charging system according to claim 1, wherein the intelligent charging pile comprises: the distributed controller, the inverter module and the second information acquisition module;
the input end of the inverter module is electrically connected with the power bus, and the second information acquisition module is used for acquiring output information of the intelligent charging pile to which the second information acquisition module belongs; the distributed controller is electrically connected with the master controller, the control signal end of the inverter module and the output end of the second information acquisition module respectively.
3. The electric vehicle soft queue charging system according to claim 2, wherein the distributed controller is electrically connected with a battery management system of the electric vehicle charged through the intelligent charging pile to which the distributed controller belongs.
4. The electric vehicle soft queue charging system according to claim 1, wherein the master controller comprises a cloud wireless communication module and a first local wireless communication module;
the general controller is electrically connected with a cloud server through the cloud wireless communication module, and the general controller is electrically connected with the intelligent charging pile through the first local wireless communication module.
5. The electric vehicle soft queue charging system according to claim 1, wherein the general controller further comprises a first display module.
6. The electric vehicle soft queue charging system of claim 2, wherein the distributed controller comprises a second local wireless communication module; the distributed controller is electrically connected with the master controller through the second local wireless communication module.
7. The electric vehicle soft queue charging system of claim 2, wherein the distributed controller comprises a user interaction module.
8. The electric vehicle soft queue charging system of claim 2, wherein the distributed controller comprises a second display module.
9. A control method of an electric vehicle soft queuing charging system, which is applied to the electric vehicle soft queuing charging system according to any one of claims 1 to 8, the control method comprising:
when a charging request sent by a target intelligent charging pile is received, inquiring the sum of real-time output power of all intelligent charging piles currently charging the electric automobile in the electric automobile soft queuing charging system through a master controller; the charging request carries the maximum charging power of the target intelligent charging pile;
judging whether the sum of the inquired real-time output power and the maximum charging power is smaller than or equal to the maximum transmission power of a feeder line electrically connected with a grid-connected circuit breaker in a power grid;
when the sum is smaller than or equal to the maximum transmission power of the feeder line, sending a charging permission instruction to the target intelligent charging pile through a master controller, so that the target intelligent charging pile starts to charge the electric automobile;
when the sum is larger than the maximum transmission power of the feeder line, the total controller adjusts the real-time output power of all the intelligent charging piles currently charging the electric automobile until the sum of the real-time output power of all the intelligent charging piles currently charging the electric automobile and the sum of the maximum charging power are smaller than or equal to the maximum transmission power of the feeder line, and the total controller sends a charging permission instruction to the target intelligent charging pile to enable the target intelligent charging pile to start charging the electric automobile.
CN202111047189.6A 2021-09-07 2021-09-07 Electric automobile soft queuing charging system and control method thereof Pending CN113859006A (en)

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JP2011211891A (en) * 2010-03-11 2011-10-20 Chugoku Electric Power Co Inc:The Charging system and charging method of charging system
CN105398347A (en) * 2015-10-21 2016-03-16 北京小飞快充网络科技有限公司 Electric vehicle intelligent queuing method capable of improving charging efficiency
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CN210225040U (en) * 2019-10-09 2020-03-31 四川蔚宇电气有限责任公司 Distributed power-limiting charging system
CN210912061U (en) * 2020-05-29 2020-07-03 华瑞达(南京)电气有限公司 Distributed flexible electric vehicle charging system
CN112874372A (en) * 2021-03-26 2021-06-01 贵安新区配售电有限公司 Electric automobile ordered charging system, method, medium, terminal and local charging pile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011211891A (en) * 2010-03-11 2011-10-20 Chugoku Electric Power Co Inc:The Charging system and charging method of charging system
CN105398347A (en) * 2015-10-21 2016-03-16 北京小飞快充网络科技有限公司 Electric vehicle intelligent queuing method capable of improving charging efficiency
CN106183876A (en) * 2016-08-25 2016-12-07 国网山西省电力公司临汾供电公司 A kind of charge/discharge control method of bidirectional electric automobile Intelligent charging spot
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