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CN112937342A - Electric vehicle power sharing group charging system and method thereof - Google Patents

Electric vehicle power sharing group charging system and method thereof Download PDF

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Publication number
CN112937342A
CN112937342A CN202110261164.XA CN202110261164A CN112937342A CN 112937342 A CN112937342 A CN 112937342A CN 202110261164 A CN202110261164 A CN 202110261164A CN 112937342 A CN112937342 A CN 112937342A
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CN
China
Prior art keywords
power
charging
controller
electric vehicle
converter station
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Pending
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CN202110261164.XA
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Chinese (zh)
Inventor
王鸿
陶梦林
孙霞
程丽宁
王致杰
李颖
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Shanghai Dianji University
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Shanghai Dianji University
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Priority to CN202110261164.XA priority Critical patent/CN112937342A/en
Publication of CN112937342A publication Critical patent/CN112937342A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • B60L53/31Charging columns specially adapted for electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60Monitoring or controlling charging stations
    • B60L53/66Data transfer between charging stations and vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60Monitoring or controlling charging stations
    • B60L53/67Controlling two or more charging stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of 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 a power sharing group charging system and a method thereof for an electric vehicle, wherein the system comprises a power converter station, the input end of the power converter station is respectively connected to an energy storage battery and an alternating current power grid, the output end of the power converter station is connected with a plurality of charging piles corresponding to different charging parking places, the power converter station and the charging piles are respectively connected to a controller, and the power converter station is used for carrying out DC/DC conversion on direct current electric energy output by the energy storage battery and AC/DC conversion on alternating current electric energy output by the alternating current power grid so as to output the chargeable direct current electric energy to the charging piles; and the controller respectively controls the working states of the power converter station and each charging pile according to the charging power of the automobile to be charged. Compared with the prior art, the method and the device can automatically distribute power according to the charging power required by the electric automobile so as to charge different electric automobiles as required, and effectively solve the problem of charging the electric automobiles in groups.

Description

Electric vehicle power sharing group charging system and method thereof
Technical Field
The invention relates to the technical field of electric vehicle charging, in particular to an electric vehicle power sharing group charging system and a method thereof.
Background
Along with the gradual strengthening of environmental awareness of people and the requirement of social development of a new era on environmental protection, electric automobiles are more and more valued by people. The quantity of electric vehicles in China is far greater than that of charging piles, and by 12 months in 2019, the overall pile ratio in China is 3.4:1, which is far lower than 1:1 planned in the guidance for development of electric vehicle charging infrastructures (2015-charge 2020), so that the construction of the charging piles is urgently accelerated and the utilization rate of the charging piles is improved.
The charging pile mainly comprises a pile body, an electrical module, a metering module and the like, generally has the functions of electric energy metering, charging, communication, control and the like, and can be divided into a direct current fast charging type and an alternating current slow charging type according to different charging powers. The present electric pile that fills electric power generally derives from the electric wire netting, and electric automobile fills electric pile's power supply mode and generally is unified by the electricity distribution room and distributes, fills electric pile and mostly is the integral type, a parking stall, a power promptly. When a plurality of electric vehicles with different charging requirements are charged simultaneously, the charging mode easily causes the power load requirement to be increased, and the problem of charging the electric vehicles in groups cannot be solved.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and provides a power sharing group charging system for electric vehicles and a method thereof, so as to effectively solve the problem of group charging for electric vehicles.
The purpose of the invention can be realized by the following technical scheme: the power sharing group charging system of the electric automobile comprises a power converter station, wherein the input end of the power converter station is respectively connected to an energy storage battery and an alternating current power grid, the output end of the power converter station is connected with a plurality of charging piles corresponding to different charging parking places, the power converter station and the charging piles are respectively connected to a controller, and the power converter station is used for carrying out DC/DC conversion on direct current electric energy output by the energy storage battery and AC/DC conversion on alternating current electric energy output by the alternating current power grid so as to output the chargeable direct current electric energy to the charging piles;
and the controller respectively controls the working states of the power converter station and each charging pile according to the charging power of the automobile to be charged.
Further, the power converter station comprises a DC-DC conversion module and an AC-DC conversion module, the DC-DC conversion module comprises a plurality of DC/DC conversion units connected in parallel, the AC-DC conversion module comprises a plurality of AC/DC conversion units connected in parallel, one DC/DC conversion unit comprises a plurality of DC/DC converters connected in parallel, and one AC/DC conversion unit comprises a plurality of AC/DC converters connected in parallel.
Further, the DC/DC conversion Unit is correspondingly connected with a PDU (Power Distribution Unit) switch matrix, and each switch element in the PDU switch matrix corresponds to each DC/DC converter of the DC/DC conversion Unit.
Further, the AC/DC conversion Unit is correspondingly connected with a PDU (Power Distribution Unit) switch matrix, and each switch element in the PDU switch matrix corresponds to each AC/DC converter of the AC/DC conversion Unit.
Further, the energy storage battery is respectively connected with the photovoltaic power generation unit and the wind power generation unit.
Furthermore, the energy storage battery is connected to an alternating current power grid through an inverter, a control end of the inverter is connected with the controller, and the controller correspondingly controls the working state of the inverter.
Further, the charging pile position is provided with a camera, the camera is connected with the controller and used for shooting a picture of the automobile to be charged at the charging pile position and sending the picture to the controller, the automobile model of the automobile to be charged is identified by the controller, and corresponding charging power data is obtained.
Further, the controller is connected with a database, and a plurality of electric automobile image data sets corresponding to different automobile models and electric automobile charging power data corresponding to different automobile models are stored in the database.
A power sharing group charging method for an electric vehicle comprises the following steps:
s1, the controller acquires the electric automobile charging power data of the current charging pile position;
s2, according to the charging power data of the electric automobile, the controller firstly judges whether the electric quantity of the energy storage battery is larger than the charging power data of the electric automobile, if so, the step S3 is executed, otherwise, the step S4 is executed;
s3, according to the charging power data of the electric automobile, the controller distributes power to each DC/DC conversion unit in the DC-DC conversion module in the power converter station, and correspondingly controls the on and off of each switch element in a PDU switch matrix connected with the DC/DC conversion unit so as to obtain electric energy from the energy storage battery to charge the electric automobile;
the controller monitors whether the DC/DC converter in the working state is damaged or not in real time, if the controller monitors that one DC/DC converter in the working state is damaged, other DC/DC converters are started randomly as a substitute, and meanwhile, the switching-on and the switching-off of the switch elements in the PDU switch matrix are correspondingly controlled, so that the electric energy obtained from the energy storage battery is ensured to be continuously stable;
s4, according to the charging power data of the electric automobile, the controller distributes power to each AC/DC conversion unit in the AC-DC conversion module in the power converter station, and correspondingly controls the on and off of each switch element in a PDU switch matrix connected with the AC/DC conversion unit so as to obtain electric energy from an AC power grid to charge the electric automobile;
the controller monitors whether the AC/DC converter in the working state is damaged or not in real time, if the AC/DC converter in the working state is monitored to be damaged, other AC/DC converters are started randomly to be used as a substitute, and meanwhile, the switching-on and switching-off of the switch elements in the PDU switch matrix are correspondingly controlled, so that the electric energy obtained from the alternating current power grid is ensured to be continuously stable.
Further, the step S1 specifically includes the following steps:
s11, the controller acquires an image of the automobile to be charged at the position of the charging pile;
s12, the controller compares the acquired image with an electric automobile image data set in the database, and the automobile model of the automobile to be charged is determined through image recognition;
and S13, according to the automobile model of the automobile to be charged, the controller searches the database to obtain charging power data corresponding to the automobile to be charged.
Compared with the prior art, the invention has the following advantages:
the charging method comprises the steps that a power converter station is arranged, the input end of the power converter station is connected to an energy storage battery and an alternating current power grid respectively, the output end of the power converter station is connected with a plurality of charging piles corresponding to different charging parking places, the power converter station is utilized to carry out DC/DC conversion on direct current electric energy output by the energy storage battery and AC/DC conversion on alternating current electric energy output by the alternating current power grid, and rechargeable direct current electric energy is output to the charging piles; and the controller is used for respectively controlling the working states of the power converter station and each charging pile, so that different charging piles can simultaneously charge different electric vehicles, and the purpose of power sharing group charging is realized.
Secondly, a plurality of DC/DC converters are connected in parallel to form a DC/DC conversion unit, and then the plurality of DC/DC conversion units are connected in parallel to form a DC-DC conversion module; connecting the AC/DC converters in parallel to form an AC/DC conversion unit, and connecting a plurality of AC/DC conversion units in parallel to form an AC-DC conversion module; and each DC/DC conversion unit and each AC/DC conversion unit are correspondingly connected to the PDU switch matrix, so that each switch element in the PDU switch matrix corresponds to the DC/DC converter and the AC/DC converter one by one, and under the control action of the controller, after the charging power data of the automobile to be charged is obtained, the purposes of automatically distributing power and automatically starting the DC/DC converter or the AC/DC converter can be realized, so that the diversity of charging power of the charging pile is increased, and the charging requirements of different electric automobiles are met.
The method and the device can automatically, quickly and accurately acquire the model of the automobile to be charged and the corresponding charging power by acquiring the image of the automobile to be charged at the position of the charging pile based on an image recognition technology, and ensure the accuracy of automatic power distribution by combining the control of the controller on the working state of the power converter station, so that different electric automobiles can accurately obtain electric energy according to the requirements.
And fourthly, the invention adopts a mode that the converters are connected in parallel, and utilizes the controller to monitor whether the DC/DC converter or the AC/DC converter in the working state is damaged or not in real time, and once a certain converter is damaged, the rest converters are automatically started, thereby ensuring the stability of the charging power.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram illustrating a charging principle of the charging pile in the embodiment;
FIG. 3 is a schematic diagram of a power converter station in an embodiment;
FIG. 4 is a schematic flow chart of the method of the present invention;
the notation in the figure is: 1. the system comprises a power converter station, 2, an energy storage battery, 3, an alternating current power grid, 4, a charging pile, 5, a controller, 101, a direct current-direct current conversion module, 102 and an alternating current-direct current conversion module.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, an electric vehicle power sharing group charging system includes a power converter station 1, an input end of the power converter station 1 is connected to an energy storage battery 2 and an alternating current power grid 3, an output end of the power converter station 1 is connected to a plurality of charging piles 4 corresponding to different charging parking spaces, the power converter station 1 and the charging piles 4 are connected to a controller 5, in this embodiment, as shown in fig. 2, the energy storage battery 2 is connected to a photovoltaic power generation unit and a wind power generation unit, the energy storage battery 2 is further connected to the alternating current power grid 3 through an inverter (DC/AC), a wind and photovoltaic hybrid clean power generation system is formed by photovoltaic power generation and wind power generation, when the wind and photovoltaic hybrid power generation electric quantity is insufficient, the charging piles 4 obtain electric energy from the alternating current power grid 3 to charge the electric vehicle, so as to ensure that; when the wind-solar hybrid power generation system has redundant electric energy, the electric energy stored in the energy storage battery 2 can be inverted and fed back to the alternating current power grid 3. The control end of the inverter is connected with the controller 5, that is, the controller 5 correspondingly controls the working state of the inverter.
In the power sharing group charging system of the electric automobile, the power converter station 1 is used for performing DC/DC conversion on the direct current electric energy output by the energy storage battery 2 and performing AC/DC conversion on the alternating current electric energy output by the alternating current power grid 3 so as to output the chargeable direct current electric energy to the charging pile 4; the controller 5 controls the working states of the power converter station 1 and the charging piles 4 respectively according to the charging power of the automobile to be charged.
The power converter station 1 includes a DC-DC conversion module 101 and an AC-DC conversion module 102, as shown in fig. 3, the DC-DC conversion module 101 includes a plurality of DC/DC conversion units connected in parallel, the AC-DC conversion module 102 includes a plurality of AC/DC conversion units connected in parallel, one DC/DC conversion unit is composed of a plurality of DC/DC converters connected in parallel, and one AC/DC conversion unit is composed of a plurality of AC/DC converters connected in parallel.
Each DC/DC conversion unit is correspondingly connected with a PDU switch matrix, and each switch element in the PDU switch matrix corresponds to each DC/DC converter of the DC/DC conversion unit; similarly, each AC/DC conversion unit is correspondingly connected with a PDU switch matrix, and each switch element in the PDU switch matrix corresponds to each AC/DC converter of the AC/DC conversion unit.
In practical application, in order to ensure that the charging power data of the automobile to be charged at the position of the charging pile can be automatically and accurately obtained, the camera is arranged at the position of the charging pile and is connected with the controller, the image of the automobile to be charged at the position of the charging pile is shot by the camera and then is sent to the controller, and then the controller identifies the automobile model of the automobile to be charged based on an image identification technology and obtains the corresponding charging power data.
The controller is connected with a database, and a plurality of electric automobile image data sets corresponding to different automobile models and electric automobile charging power data corresponding to different automobile models are stored in the database.
The power sharing system of the electric vehicle is applied to practice, and a specific power sharing group charging method is shown in fig. 4, and includes the following steps:
s1, the controller acquires the electric automobile charging power data of the current charging pile position, and concretely comprises the following steps:
firstly, the controller acquires an image of an automobile to be charged at the position of a charging pile;
then, the controller compares the acquired image with an electric automobile image data set in the database, and determines the automobile model of the automobile to be charged through image recognition;
then according to the automobile model of the automobile to be charged, the controller searches in the database to obtain charging power data corresponding to the automobile to be charged;
s2, according to the charging power data of the electric automobile, the controller firstly judges whether the electric quantity of the energy storage battery is larger than the charging power data of the electric automobile, if so, the step S3 is executed, otherwise, the step S4 is executed;
s3, according to the charging power data of the electric automobile, the controller distributes power to each DC/DC conversion unit in the DC-DC conversion module in the power converter station, and correspondingly controls the on and off of each switch element in a PDU switch matrix connected with the DC/DC conversion unit so as to obtain electric energy from the energy storage battery to charge the electric automobile;
the controller monitors whether the DC/DC converter in the working state is damaged or not in real time, if the controller monitors that one DC/DC converter in the working state is damaged, other DC/DC converters are started randomly as a substitute, and meanwhile, the switching-on and the switching-off of the switch elements in the PDU switch matrix are correspondingly controlled, so that the electric energy obtained from the energy storage battery is ensured to be continuously stable;
s4, according to the charging power data of the electric automobile, the controller distributes power to each AC/DC conversion unit in the AC-DC conversion module in the power converter station, and correspondingly controls the on and off of each switch element in a PDU switch matrix connected with the AC/DC conversion unit so as to obtain electric energy from an AC power grid to charge the electric automobile;
the controller monitors whether the AC/DC converter in the working state is damaged or not in real time, if the AC/DC converter in the working state is monitored to be damaged, other AC/DC converters are started randomly to be used as a substitute, and meanwhile, the switching-on and switching-off of the switch elements in the PDU switch matrix are correspondingly controlled, so that the electric energy obtained from the alternating current power grid is ensured to be continuously stable.
In conclusion, the technical scheme utilizes wind, light, storage and power grid to supply power, can improve the utilization rate of clean energy, reduce environmental pollution and reduce the impact of large-scale electric automobile charging on the power grid;
in the power converter station, a plurality of DC/DC converters are connected in parallel to form a DC-DC conversion module, a plurality of AC/DC converters are connected in parallel to form an AC-DC conversion module, and the DC/DC converters or the AC/DC converters can be dynamically distributed according to the charging power actually required by the electric automobile by combining the control action of a PDU switch matrix and a controller, so that the defect of one pile of power and one pile of power is overcome, and the diversity of the charging power of a charging pile is increased;
in addition, by adopting the parallel connection mode of the converters, once a certain converter is damaged, the rest converters can be automatically switched on, and the charging power is ensured to be continuously stable and unchanged.

Claims (10)

1.一种电动汽车功率共享群充系统,其特征在于,包括功率变流站(1),所述功率变流站(1)的输入端分别连接至储能电池(2)和交流电网(3),所述功率变流站(1)的输出端连接有多个对应于不同充电车位的充电桩(4),所述功率变流站(1)和充电桩(4)分别连接至控制器(5),所述功率变流站(1)用于对储能电池(2)输出的直流电能进行DC/DC变换、对交流电网(3)输出的交流电能进行AC/DC变换,以输出可充直流电能给充电桩(4);1. An electric vehicle power sharing group charging system, characterized in that it comprises a power converter station (1), the input ends of which are respectively connected to an energy storage battery (2) and an alternating current grid (1). 3), the output end of the power converter station (1) is connected with a plurality of charging piles (4) corresponding to different charging parking spaces, and the power converter station (1) and the charging pile (4) are respectively connected to the control a device (5), wherein the power converter station (1) is used to perform DC/DC conversion on the DC power output by the energy storage battery (2) and AC/DC conversion on the AC power output by the AC power grid (3), so as to outputting rechargeable DC power to the charging pile (4); 所述控制器(5)根据待充电汽车的充电功率,以分别控制功率变流站(1)和各个充电桩(4)的工作状态。The controller (5) controls the working states of the power converter station (1) and each charging pile (4) respectively according to the charging power of the vehicle to be charged. 2.根据权利要求1所述的一种电动汽车功率共享群充系统,其特征在于,所述功率变流站(1)包括直流-直流变换模块(101)和交流-直流变换模块(102),所述直流-直流变换模块(101)包括多个并联的DC/DC变换单元,所述交流-直流变换模块(102)包括多个并联的AC/DC变换单元,一个DC/DC变换单元由多个并联的DC/DC变换器构成,一个AC/DC变换单元由多个并联的AC/DC变换器构成。2. A power sharing group charging system for electric vehicles according to claim 1, characterized in that the power converter station (1) comprises a DC-DC conversion module (101) and an AC-DC conversion module (102) , the DC-DC conversion module (101) includes a plurality of parallel-connected DC/DC conversion units, the AC-DC conversion module (102) includes a plurality of parallel-connected AC/DC conversion units, and one DC/DC conversion unit is composed of It consists of multiple parallel DC/DC converters, and one AC/DC conversion unit consists of multiple parallel AC/DC converters. 3.根据权利要求2所述的一种电动汽车功率共享群充系统,其特征在于,所述DC/DC变换单元对应连接有PDU开关矩阵,所述PDU开关矩阵中各开关元素对应于DC/DC变换单元的各DC/DC变换器。3 . The electric vehicle power sharing group charging system according to claim 2 , wherein the DC/DC conversion unit is correspondingly connected with a PDU switch matrix, and each switch element in the PDU switch matrix corresponds to the DC/DC switch matrix. 4 . Each DC/DC converter of the DC conversion unit. 4.根据权利要求3所述的一种电动汽车功率共享群充系统,其特征在于,所述AC/DC变换单元对应连接有PDU开关矩阵,所述PDU开关矩阵中各开关元素对应于AC/DC变换单元的各AC/DC变换器。4 . The electric vehicle power sharing group charging system according to claim 3 , wherein the AC/DC conversion unit is correspondingly connected with a PDU switch matrix, and each switch element in the PDU switch matrix corresponds to the AC/DC switch matrix. 5 . Each AC/DC converter of the DC conversion unit. 5.根据权利要求1所述的一种电动汽车功率共享群充系统,其特征在于,所述储能电池(2)分别与光伏发电单元和风力发电单元连接。5 . The power sharing group charging system for electric vehicles according to claim 1 , wherein the energy storage battery ( 2 ) is respectively connected with a photovoltaic power generation unit and a wind power generation unit. 6 . 6.根据权利要求5所述的一种电动汽车功率共享群充系统,其特征在于,所述储能电池(2)通过逆变器连接至交流电网(3),所述逆变器的控制端与控制器(5)连接,由控制器(5)对应控制逆变器的工作状态。6 . The electric vehicle power sharing group charging system according to claim 5 , wherein the energy storage battery ( 2 ) is connected to the AC power grid ( 3 ) through an inverter, and the control of the inverter The terminal is connected with the controller (5), and the controller (5) correspondingly controls the working state of the inverter. 7.根据权利要求4所述的一种电动汽车功率共享群充系统,其特征在于,所述充电桩(4)位置设置有摄像头,所述摄像头与控制器(5)连接,用于拍摄充电桩(4)位置的待充电汽车图片,并将该图片发送至控制器(5),由控制器(5)识别出待充电汽车的汽车型号,并得到对应的充电功率数据。7 . The electric vehicle power sharing group charging system according to claim 4 , wherein a camera is provided at the position of the charging pile ( 4 ), and the camera is connected to the controller ( 5 ) for shooting and charging. 8 . The picture of the car to be charged at the position of the pile (4) is sent, and the picture is sent to the controller (5), the controller (5) identifies the car model of the car to be charged, and obtains corresponding charging power data. 8.根据权利要求7所述的一种电动汽车功率共享群充系统,其特征在于,所述控制器(5)连接有数据库,所述数据库内存储有多个对应于不同汽车型号的电动汽车图像数据集以及对应于不同汽车型号的电动汽车充电功率数据。8 . The electric vehicle power sharing group charging system according to claim 7 , wherein the controller (5) is connected with a database, and a plurality of electric vehicles corresponding to different vehicle models are stored in the database. 9 . Image dataset and EV charging power data corresponding to different car models. 9.一种应该如权利要求8所述电动汽车功率共享群充系统的电动汽车功率共享群充方法,其特征在于,包括以下步骤:9. An electric vehicle power sharing group charging method should be as claimed in claim 8, characterized in that, comprising the following steps: S1、控制器获取当前充电桩位置的电动汽车充电功率数据;S1. The controller obtains the electric vehicle charging power data of the current charging pile position; S2、根据电动汽车充电功率数据,控制器首先判断储能电池的电量是否大于电动汽车充电功率数据,若判断为是,则执行步骤S3,否则执行步骤S4;S2. According to the electric vehicle charging power data, the controller first determines whether the power of the energy storage battery is greater than the electric vehicle charging power data, and if it is determined to be yes, execute step S3; otherwise, execute step S4; S3、根据电动汽车充电功率数据,控制器对功率变流站内直流-直流变换模块中各DC/DC变换单元进行功率分配,并对应控制与DC/DC变换单元连接的PDU开关矩阵中各开关元素的导通与关断,以从储能电池获取电能给电动汽车进行充电;S3. According to the charging power data of the electric vehicle, the controller distributes power to each DC/DC conversion unit in the DC-DC conversion module in the power converter station, and correspondingly controls each switch element in the PDU switch matrix connected to the DC/DC conversion unit. The turn-on and turn-off of the electric vehicle can be obtained from the energy storage battery to charge the electric vehicle; 控制器实时监测处于工作状态的DC/DC变换器是否发生损坏,若监测到某个处于工作状态的DC/DC变换器发生损坏,则随机启用其余的DC/DC变换器作为替补,同时对应控制PDU开关矩阵中开关元素的导通与关断,以保证从储能电池获取的电能持续稳定;The controller monitors whether the DC/DC converter in working state is damaged in real time. If it detects that a DC/DC converter in working state is damaged, it will randomly activate the other DC/DC converters as substitutes, and control the corresponding control at the same time. The on and off of the switch elements in the PDU switch matrix to ensure the continuous and stable power obtained from the energy storage battery; S4、根据电动汽车充电功率数据,控制器对功率变流站内交流-直流变换模块中各AC/DC变换单元进行功率分配,并对应控制与AC/DC变换单元连接的PDU开关矩阵中各开关元素的导通与关断,以从交流电网获取电能给电动汽车进行充电;S4. According to the charging power data of the electric vehicle, the controller distributes power to each AC/DC conversion unit in the AC-DC conversion module in the power converter station, and correspondingly controls each switch element in the PDU switch matrix connected to the AC/DC conversion unit. The turn-on and turn-off of the electric vehicle can be obtained from the AC grid to charge the electric vehicle; 控制器实时监控处于工作状态的AC/DC变换器是否发生损坏,若监测到某个处于工作状态的AC/DC变换器发生损坏,则随机启用其余的AC/DC变换器作为替补,同时对应控制PDU开关矩阵中开关元素的导通与关断,以保证从交流电网获取的电能持续稳定。The controller monitors whether the AC/DC converter in working state is damaged in real time. If it detects that a certain AC/DC converter in working state is damaged, the other AC/DC converters are randomly activated as substitutes, and the corresponding control The switch elements in the PDU switch matrix are turned on and off to ensure the continuous and stable power obtained from the AC grid. 10.根据权利要求9所述的一种电动汽车功率共享群充方法,其特征在于,所述步骤S1具体包括以下步骤:10 . The power sharing group charging method for electric vehicles according to claim 9 , wherein the step S1 specifically comprises the following steps: 11 . S11、控制器获取充电桩位置的待充电汽车的图像;S11, the controller obtains an image of the vehicle to be charged at the location of the charging pile; S12、控制器将获取的图像与数据库内的电动汽车图像数据集进行比对,通过图像识别,以确定待充电汽车的汽车型号;S12, the controller compares the acquired image with the electric vehicle image data set in the database, and determines the vehicle model of the vehicle to be charged through image recognition; S13、根据待充电汽车的汽车型号,控制器从数据库内搜索得到待充电汽车对应的充电功率数据。S13. According to the car model of the car to be charged, the controller searches the database to obtain charging power data corresponding to the car to be charged.
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