CN112124132B - Non-vehicle charging and discharging system in grid-connected mode and isolated grid mode and charging pile - Google Patents

Non-vehicle charging and discharging system in grid-connected mode and isolated grid mode and charging pile Download PDF

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Publication number
CN112124132B
CN112124132B CN202011034955.0A CN202011034955A CN112124132B CN 112124132 B CN112124132 B CN 112124132B CN 202011034955 A CN202011034955 A CN 202011034955A CN 112124132 B CN112124132 B CN 112124132B
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charging
discharging
grid
loop
control module
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CN112124132A (en
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窦胜
周一心
刘国鹏
李定胜
顾进飞
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Nanjing Nengrui Electric Power Technology Co ltd
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Nanjing Nengrui Electric Power Technology Co ltd
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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
    • 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
    • B60L53/66—Data transfer between charging stations and vehicles
    • B60L53/665—Methods related to measuring, billing or payment
    • 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
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The invention discloses a non-vehicle charging and discharging system and a charging pile under a grid-connected mode and an isolated grid mode, which comprise a charging and discharging main control module, a power control module and a charging and discharging loop module; the charging and discharging loop module comprises a grid-connected mode charging and discharging loop and an isolated network mode discharging loop; the charge and discharge main control module is used for determining a charge and discharge loop operation mode according to a user demand instruction; the power control module is in communication connection with the charging and discharging main control module and is used for controlling the operation of the grid-connected mode charging and discharging loop according to the operation mode of the charging and discharging loop so that the power grid circuit charges the electric automobile or the electric automobile discharges the power grid circuit; or controlling the isolated network mode discharge loop to operate so that the electric automobile discharges to the electric load. The invention solves the technical problems that the smooth switching of charging and discharging of the electric automobile in a grid-connected mode and an isolated network mode does not influence each other and the energy flows intelligently.

Description

Non-vehicle charging and discharging system in grid-connected mode and isolated grid mode and charging pile
Technical Field
The embodiment of the invention relates to the technical field of electric automobile charging, in particular to a non-vehicle charging and discharging system and a charging pile in a grid-connected mode and an isolated grid mode, and aims at an electric automobile and power grid interaction system.
Background
V2G is an abbreviation for Vehicle-to-grid, and V2G describes the relationship of an electric car to the grid. When the electric automobile is not used, the electric energy of the vehicle-mounted battery is sold to a power grid system. If the on-board battery needs charging, current flows from the grid to the vehicle.
Since most vehicles are parked 95% of the time, the on-board battery can act as a distributed energy storage unit. It is estimated that each vehicle can bring the value to the utility company $ 4000. In 2025, the holding capacity of the electric automobile can reach 5000-. The economic value of 8 million electric automobiles is equal to 15 percent of the total production value GDP in China.
In the face of such great economic and environmental values, there are problems with the technology. Particularly, the charging facility is used as a bridge and a link for the energy flow of the electric automobile and a power grid, and the safety and intelligence of the charging facility directly influence the bidirectional flow of the energy. Under the grid-connected state, energy realizes bidirectional flow; and under isolated network operation, the power supply is supplied to a conventional load. At present, the technical problems that smooth switching cannot be realized, mutual influence cannot be realized, and energy cannot flow intelligently exist in the two modes, so that the evolution process of an energy structure is seriously influenced.
Disclosure of Invention
In view of this, the embodiment of the invention provides a non-vehicle charging and discharging system and a charging pile in a grid-connected mode and an isolated network mode, so as to solve the technical problems that smooth switching of charging and discharging of an electric vehicle in the grid-connected mode and the isolated network mode does not affect each other and energy intelligently flows.
In a first aspect, an embodiment of the present invention provides an off-board charging and discharging system in a grid-connected mode and an isolated grid mode, including:
the charging and discharging control system comprises a charging and discharging main control module, a power control module and a charging and discharging loop module; the charging and discharging loop module comprises a grid-connected mode charging and discharging loop and an isolated network mode discharging loop;
the charge and discharge main control module is used for determining a charge and discharge loop operation mode according to a user demand instruction;
the power control module is in communication connection with the charge-discharge main control module and is used for controlling the grid-connected mode charge-discharge loop to operate according to the charge-discharge loop operation mode so as to enable the power grid circuit to charge the electric automobile or enable the electric automobile to discharge the power grid circuit; or controlling the isolated network mode discharge loop to operate so that the electric automobile discharges to the electric load.
Optionally, the charge and discharge loop module further includes a circuit interlock protection unit, where the circuit interlock protection unit includes a first protection subunit and a second protection subunit;
the first protection subunit is arranged in the grid-connected mode charging and discharging loop in series, and the second protection subunit is arranged in the isolated grid mode discharging loop in series;
the first protection subunit and the second protection subunit are both in communication connection with the power control module; the power control module is used for controlling the first protection subunit to be conducted or controlling the second protection subunit to be conducted according to the charge-discharge loop operation mode.
Optionally, the circuit interlock protection unit further includes a power monitoring subunit;
the power supply monitoring subunit is arranged in the grid-connected mode charge-discharge loop in series and is used for monitoring an electric signal in the grid-connected mode charge-discharge loop;
the power control module is in communication connection with the power supply monitoring subunit and is used for controlling the first protection subunit to be conducted or controlling the second protection subunit to be conducted according to the charge-discharge loop operation mode and the electric signal.
Optionally, the circuit interlock protection unit further includes an interlock button, and the interlock button is connected to the first protection subunit and the second protection subunit respectively;
the interlocking button is used for controlling the first protection subunit to be conducted or controlling the second protection subunit to be conducted.
Optionally, the off-board charging and discharging system further includes a charging control module, and the charging control module is in communication connection with the charging and discharging main control module;
and the charging control module is used for receiving the user demand instruction and transmitting the user demand instruction to the charging and discharging main control module.
Optionally, the off-board charging and discharging system further includes a remote control module;
the remote control module is in communication connection with the charging control module; the remote control module is used for sending a remote control instruction to the charging control module, and the charging control module is used for transmitting the remote control instruction to the charging and discharging main control module so as to enable the off-board charging and discharging system to work according to the remote control instruction.
Optionally, the charge and discharge loop module further includes a first ac circuit breaker, a second ac circuit breaker, a third ac circuit breaker, and a fourth ac circuit breaker; the first alternating current circuit breaker, the second alternating current circuit breaker, the third alternating current circuit breaker and the fourth alternating current circuit breaker are all in communication connection with the remote control module;
the charge-discharge loop module also comprises a main power supply loop of a power grid;
the first alternating current circuit breaker is electrically connected with a voltage input end of the power grid power supply main loop; the second alternating current circuit breaker is electrically connected with the voltage input end of the grid-connected mode charge-discharge loop; the third alternating current circuit breaker is electrically connected with the isolated network mode discharge loop voltage output end; the fourth alternating current circuit breaker is electrically connected with a grid-connected mode charging and discharging loop voltage output end and an isolated network mode discharging loop voltage input end;
in a grid-connected charging and discharging mode, the first alternating current circuit breaker, the second alternating current circuit breaker and the fourth alternating current circuit breaker are closed, and the third alternating current circuit breaker is opened;
and in an isolated grid discharging mode, the third alternating current circuit breaker and the fourth alternating current circuit breaker are closed, and the first alternating current circuit breaker and the second alternating current circuit breaker are opened.
Optionally, the charge and discharge loop module further includes a main power supply loop and a public loop of the power grid;
the first end of the main power supply loop of the power grid is electrically connected with the power grid, the second end of the main power supply loop of the power grid is electrically connected with the first end of the grid-connected mode charge-discharge loop, the second end of the grid-connected mode charge-discharge loop is electrically connected with the first end of the public loop, and the second end of the public loop is electrically connected with the charge-discharge main control module;
the first end of the isolated network mode discharge loop is electrically connected with the first end of the common loop, and the second end of the isolated network mode discharge loop is electrically connected with the power load.
Optionally, the grid-connected mode charge-discharge circuit includes a molded case circuit breaker and a dc/ac bidirectional converter;
the isolated network mode discharge circuit comprises a direct current contactor, an inverter, a fuse and a miniature circuit breaker;
the public loop comprises a lightning protector, a discharge resistor, a shunt, a direct current contactor and a radiator;
the first end of the first protection subunit is electrically connected with the molded case circuit breaker, and the second end of the first protection subunit is electrically connected with the direct current/alternating current bidirectional converter;
the first end of the second protection subunit is electrically connected with the fuse, and the second end of the second protection subunit is electrically connected with the miniature circuit breaker.
Optionally, the miniature circuit breaker has a manual start-stop function.
Optionally, the charging and discharging loop module further includes an emergency power supply module;
the emergency power supply module is respectively electrically connected with the charge-discharge main control module and the power control module and is used for supplying power to the charge-discharge main control module and the power control module.
Optionally, the working power of the grid-connected mode charging and discharging loop is different from the working power of the isolated grid mode discharging loop.
Optionally, the charging control module includes an antenna, a card reader, an audio device, a display, and a meter.
In a second aspect, an embodiment of the present invention further provides a charging pile, including the off-board charging and discharging system according to any one of claims 1 to 13, further including a charging gun;
and under a grid-connected charging and discharging mode and an isolated grid discharging mode, the charging gun is electrically connected with the electric automobile.
The embodiment of the invention discloses an off-board charging and discharging system in a grid-connected mode and an isolated grid mode, which comprises a charging and discharging main control module, a power control module and a charging and discharging loop module; the charging and discharging loop module comprises a grid-connected mode charging and discharging loop and an isolated network mode discharging loop; the charge and discharge main control module is used for determining a charge and discharge loop operation mode according to a user demand instruction; the power control module is in communication connection with the charging and discharging main control module and is used for controlling the operation of the grid-connected mode charging and discharging loop according to the operation mode of the charging and discharging loop so that the power grid circuit charges the electric automobile or the electric automobile discharges the power grid circuit; or controlling the isolated network mode discharge loop to operate so that the electric automobile discharges to the electric load. The technical problems that in the prior art, the electric automobile cannot be smoothly switched, the mutual influence and the energy cannot flow intelligently under a grid-connected mode and an isolated network mode are solved, the electric automobile is used as a distributed energy storage unit and a power grid and is friendly to the human daily life electricity consumption in different application scenes, and the aims of smooth switching and bidirectional energy transmission are achieved. Furthermore, the safety of discharging can be improved based on the discharging safety design and the discharging safety early warning monitoring, the power supply of a user who plans to have a power failure is discharged to guarantee the user, the undisturbed orderly power utilization of the user side is realized, theoretical and technical support is provided for interaction of a future large-scale electric automobile and a power grid, and the beneficial effects that the charging and discharging of the electric automobile are smoothly switched, the charging and discharging in a grid-connected mode and the discharging in an isolated grid mode are not influenced by each other, and the energy flows intelligently are achieved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a circuit diagram of an off-vehicle charging and discharging system in a grid-connected mode and an isolated network mode according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an off-board charging and discharging system in a grid-connected mode and an isolated grid mode according to another embodiment of the present invention;
fig. 3 is a circuit diagram of an off-board charging and discharging system in a grid-connected mode and an isolated grid mode according to another embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described by the detailed description with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present invention.
Examples
Fig. 1 is a circuit diagram of an off-board charging and discharging system in a grid-connected mode and an isolated network mode according to an embodiment of the present invention, which is applicable to different application scenarios. Referring to fig. 1, an off-board charging and discharging system in a grid-connected mode and an isolated grid mode includes: the charging and discharging control system comprises a charging and discharging main control module 1, a power control module 2 and a charging and discharging loop module 3; the charge and discharge loop module 3 comprises a grid-connected mode charge and discharge loop 31 and an isolated grid mode discharge loop 32; the charge and discharge main control module 1 is used for determining a charge and discharge loop operation mode according to a user demand instruction; the power control module 2 is in communication connection with the charging and discharging main control module 1 and is used for controlling the operation of the grid-connected mode charging and discharging loop 31 according to the operation mode of the charging and discharging loop so that a power grid circuit charges an electric automobile or the electric automobile discharges the power grid circuit; or the isolated grid mode discharging loop 32 is controlled to operate, so that the electric automobile is discharged to the electric load.
For example, in the use of the electric vehicle and the power grid circuit and the electricity consumption of human daily life, the off-board charging and discharging system receives and responds to a user demand instruction issued by the electric vehicle and the power grid interaction system, wherein the user demand instruction comprises a command for charging the electric vehicle by the power grid circuit or a command for discharging the electric vehicle to the power grid or a command for discharging the electric vehicle to an electricity consumption load. Illustratively, the charge and discharge main control module 1 comprises an indicator light, an emergency stop button, an output relay, an entrance guard and an electronic lock interface, and the charge and discharge main control module has the functions of receiving a user demand instruction, dynamically adjusting charge and discharge operation parameters of the charge and discharge main control module 1, feeding back energy values of a power storage battery system of an electric automobile in the storage battery management system to a power grid circuit, and sending a control instruction and emergency stop protection to the power control module 2. The charging and discharging main control module 1 of the off-board charging and discharging system receives a user demand instruction, determines a charging and discharging loop operation mode according to the user demand instruction, and sends an instruction for executing the charging and discharging loop operation mode to the power control module 2, the charging and discharging loop operation mode comprises a grid-connected mode charging and discharging loop 31 operation or an isolated network mode discharging loop 32 operation, the power control module 2 controls the grid-connected mode charging and discharging loop 31 operation according to the charging and discharging loop operation mode, so that a power grid circuit charges an electric automobile or the electric automobile discharges the power grid circuit, or controls the isolated network mode discharging loop 32 operation, so that the electric automobile discharges to an electricity load. The grid-connected mode and the isolated network mode can not be carried out simultaneously, smooth switching bidirectional flow of electric energy of the electric automobile and a power grid is realized, and the electric automobile is used as a power supply to independently supply power to a load, so that the electric automobile is reasonably utilized as a distributed energy storage unit.
To sum up, according to the off-board charging and discharging system in the grid-connected mode and the isolated network mode provided by the embodiment of the invention, the operation mode of the charging and discharging loop is determined according to the user demand instruction to control the power grid circuit to charge the electric vehicle or discharge the electric vehicle to the power grid circuit or discharge the electric vehicle to the power load, the grid-connected mode and the isolated network mode are set to be unable to be performed simultaneously in the operation of the off-board charging and discharging system, so that the smooth switching bidirectional flow of the electric energy of the electric vehicle and the power grid in the grid-connected mode is realized, the aim of smooth switching and bidirectional energy transmission is achieved, the electric vehicle is used as a power supply to independently supply power to the load in the isolated network mode, the power is discharged to the user who plans to have power cut off so as to ensure the power supply of the user, and the purpose of 'undisturbed' ordered power consumption of the user is achieved. Under different application scenes, the electric automobile is used as a distributed energy storage unit to interact with a power grid and human daily life power consumption friendly, based on discharge safety design and discharge safety early warning monitoring, discharge safety is improved, meanwhile, theoretical and technical support is provided for interaction of future large-scale electric automobiles and the power grid, smooth switching of charging and discharging of the electric automobile is achieved, and the beneficial effects that charging and discharging in a grid-connected mode and discharging in an isolated network mode do not influence each other and energy flows intelligently are achieved.
Optionally, the working power of the grid-connected mode charging and discharging circuit 31 is different from the working power of the isolated grid mode discharging circuit 32. For example, when the charging operation from the power grid to the electric vehicle and the discharging operation from the electric vehicle to the power grid are performed in the grid-connected mode charging and discharging loop 31, the charging power or the discharging power can be both 60 kW; the isolated network mode discharge circuit 32 electric vehicle can provide an emergency power supply for the discharge of the independent local area network, can realize the discharge power of 5kW for the stable operation of a load, and exemplarily, the independent local area network can be a household power load.
As a possible embodiment, with continued reference to fig. 1, the charge and discharge loop module 3 further includes a circuit interlock protection unit 33, and the circuit interlock protection unit 33 includes a first protection subunit 331 and a second protection subunit 332; the first protection subunit 331 is serially connected to the grid-connected mode charge and discharge circuit 31, and the second protection subunit 332 is serially connected to the isolated grid mode discharge circuit 32; the first protection subunit 331 and the second protection subunit 332 are both in communication connection with the power control module 2; the power control module 2 is configured to control the first protection subunit 331 to be turned on or control the second protection subunit 332 to be turned on according to the charge and discharge loop operation mode.
For example, in order to effectively prevent the isolated network mode discharge circuit 32 from being simultaneously conducted when the grid-connected mode charge and discharge circuit 31 is conducted, and causing short circuit of the isolated network mode discharge circuit 32 or damage to hardware equipment, which may cause power consumption hazard, the charge and discharge circuit module 3 further includes a circuit interlock protection unit 33, and in order to further enhance safety, the circuit interlock protection unit may adopt an electrical interlock mode and/or a software interlock mode, and preferably, the electrical interlock mode and the software interlock mode are selected to simultaneously perform circuit protection. Illustratively, the circuit interlock protection unit 33 includes a first protection subunit 331 and a second protection subunit 332, the first protection subunit 331 may use an ac contactor KM, the second protection subunit 332 may use an ac contactor KM1, the ac contactor KM is disposed in series in the grid-connected mode charging and discharging circuit 31, the alternating current contactor KM is connected with the control network mode charging and discharging loop 31 and is conducted, the alternating current contactor KM1 is serially arranged on the isolated network mode discharging loop 32, the alternating current contactor KM1 is connected with the control isolated network mode discharging loop 32 and is conducted, the alternating current contactor KM and the alternating current contactor KM1 are both in communication connection with the power control module 2, the communication mode can be RS-485 in communication connection, the alternating current contactor KM and the alternating current contactor KM1 are arranged in a software interlocking mode, and the power control module 2 controls the alternating current contactor KM or controls the alternating current contactor KM1 to be conducted according to the charging and discharging loop operation mode. Illustratively, when the power control module 2 receives a control instruction of the charging and discharging main control module 1, the control instruction includes that the power control module 2 controls the conduction of the alternating current contactor KM to realize the conduction of the charging and discharging loop 31 in the grid-connected mode, before the alternating current contactor KM is controlled to be switched on, the power control module 2 delays for three seconds to execute a control instruction and collects the working states of the alternating current contactor KM and the alternating current contactor KM1, wherein the working states comprise the switching-off state or the switching-on state, the power control module 2 judges whether to execute the instruction according to the working states of the alternating current contactor KM and the alternating current contactor KM1, if the alternating current contactor KM1 is switched off, and executing a control instruction to control the conduction of the alternating current contactor KM, if the alternating current contactor KM1 is closed, the power control module 2 firstly controls the disconnection of the alternating current contactor KM1, and then executing the instruction to control the closing of the alternating current contactor KM, so that the conduction of the grid-connected mode charging and discharging loop 31 is realized. Similarly, if the control command is to turn on the isolated network mode discharging circuit 32, the power control module 2 monitors and controls the state of the ac contactor KM, which will not be described in detail herein. The power control module 2 monitors and controls the alternating current contactor KM and the alternating current contactor KM1, and realizes the energy alternating current safety switching of charging the electric automobile from the power grid circuit or discharging the electric automobile to the power grid circuit from a software control mode.
Optionally, the circuit interlock protection unit 33 further includes a power monitoring subunit (not shown in the figure); the power monitoring subunit is arranged in the grid-connected mode charge-discharge loop 31 in series and is used for monitoring an electric signal in the grid-connected mode charge-discharge loop 31; the power control module 2 is in communication connection with the power monitoring subunit, and is configured to control the first protection subunit 331 to be turned on or control the second protection subunit 332 to be turned on according to the charge-discharge loop operation mode and the electrical signal.
For example, to further optimize the software interlock mode, the power monitoring subunit may select three guide rail tables, which are installed in the grid-connected mode charge/discharge circuit 31 and used for detecting an electrical signal in the grid-connected mode charge/discharge circuit 31, where the electrical signal includes a voltage signal of the grid-connected mode charge/discharge circuit 31, the three guide rail tables send the collected voltage signal to the power control module 2, and the power control module 2 determines the conduction state of the current grid-connected mode charge/discharge circuit 31 according to the voltage signal. When the power control module 2 receives a control instruction of the charging and discharging main control module 1, the control instruction comprises that the power control module 2 controls the conduction of the alternating current contactor KM1, the conduction of the isolated network mode discharging loop 32 is realized, the power control module 2 delays three seconds to execute the control instruction, if a voltage signal is zero, the grid-connected mode charging and discharging loop 31 is disconnected, the power control module 2 executes the control instruction to control the conduction of the alternating current contactor KM1 and the conduction of the isolated network mode discharging loop 31, the safe switching of energy transmission for discharging the electric vehicle to the power load is protected in a software control mode, and the 'undisturbed' ordered power utilization at a user side is realized; if the voltage signal is greater than zero, it indicates that the grid-connected mode charging and discharging circuit 31 is charging or discharging, at this time, the power control module 2 may first control the ac contactor KM to be turned off, and then execute an instruction to control the ac contactor KM1 to be turned on to realize the turn-on of the grid-connected mode charging and discharging circuit 32, or the power control module 2 waits for a new control instruction.
Optionally, the circuit interlock protection unit further includes an interlock button (not shown in the figure), and the interlock button is respectively connected to the first protection subunit 331 and the second protection subunit 332; the interlock button 334 is used to control the first protection subunit to be turned on or the second protection subunit to be turned on. For example, for further circuit protection setting, an electrical interlocking mode is combined with a software interlocking mode, and an interlocking button is respectively connected with the alternating current contactor KM and the alternating current contactor KM1, so that the alternating current contactor KM and the alternating current contactor KM1 have an electrical interlocking function, such as: the AC contactor KM is conducted, the AC contactor KM1 is disconnected, or the AC contactor KM1 is conducted, and the AC contactor KM is disconnected. The interlocking button is combined with a software interlocking mode to further realize the double-channel safe switching of grid-connected mode charging and discharging and isolated mode discharging, so that the power utilization safety is ensured.
As a possible embodiment, with continued reference to fig. 1, the charge-discharge circuit module 3 further comprises a main grid supply circuit 34 and a common circuit 35; a first end of the main power grid supply loop 34 is electrically connected with a power grid, a second end of the main power grid supply loop 34 is electrically connected with a first end of the grid-connected mode charge-discharge loop 31, a second end of the grid-connected mode charge-discharge loop 31 is electrically connected with a first end of the public loop 35, and a second end of the public loop 35 is electrically connected with the charge-discharge main control module 1; a first end of the isolated mode discharge circuit 32 is electrically connected to a first end of the common circuit 35, and a second end of the isolated mode discharge circuit 32 is electrically connected to the electrical load.
Illustratively, when the off-board charging and discharging system works in a grid-connected mode, a first end of a main power supply loop of the power grid is connected with a power grid to be conducted, a second end of the main power supply loop of the power grid is connected with a first end of a charging and discharging loop 31 of the grid-connected mode to be conducted, a second end of the charging and discharging loop 31 of the grid-connected mode is conducted with a first end of a public loop, and a second end of the public loop is conducted with a charging and discharging main control module 1, so that charging and discharging control under a control grid mode of the charging and discharging main control module 1 is realized; when the off-board charging and discharging system works in the isolated network mode, the first end of the isolated network mode discharging loop 32 is communicated with the first end of the public loop 35, and the second end of the isolated network mode discharging loop is communicated with the electric load, so that the electric vehicle discharges to the electric load.
Optionally, with continued reference to fig. 1, the charge-discharge loop module 3 further comprises an emergency power supply module 36; the emergency power supply module is electrically connected to the charge and discharge main control module 1 and the power control module 2, respectively (not shown in the figure), and is configured to supply power to the charge and discharge main control module 1 and the power control module 2. For example, the emergency Power Supply module 36 may be an Uninterruptible Power Supply (UPS), which is mainly used to provide an uninterrupted Power Supply for some devices with high requirements on Power stability, and for example, in case of sudden Power failure of a Power grid in a grid-connected mode or discharge of an electric vehicle in an isolated grid mode to a load, Power is supplied to the charge and discharge main control module 1, the Power control module 2, and the like for 1-2 hours.
As a feasible embodiment, fig. 2 is a circuit diagram of an off-board charging and discharging system in a grid-connected mode and an isolated grid mode according to another embodiment of the present invention, referring to fig. 2, the off-board charging and discharging system further includes a charging control module 4, and the charging control module 4 is in communication connection with the charging and discharging main control module 1; the charging control module 4 is used for receiving a user demand instruction and transmitting the user demand instruction to the charging and discharging main control module 3.
Illustratively, in a grid-connected mode or an isolated network mode, when a user uses the off-board charging and discharging system to perform charging and discharging operations, the charging control module 4 includes an operation panel (not shown in the figure), the operation panel has a manual operation function, the user can select an operation mode of the off-board charging and discharging system by using the operation panel, the operation mode includes grid-connected mode charging or grid-connected mode discharging or isolated network mode discharging, the charging control module 4 is in communication connection with the charging and discharging main control module 1, an operation mode instruction selected by the user is transmitted to the charging and discharging main control module 1, and the charging and discharging main control module 1 controls the power control module 2 to execute the operation mode instruction, so that friendly interaction between the user and the off-board charging and discharging machine is realized.
Optionally, the billing control module 4 includes an antenna, a card reader, an audio device, a display and a meter (not shown in the figure), for example, the antenna is used for receiving communication information; the card reader is used for writing in each operation mode parameter of the off-board charging and discharging system, the operation mode parameters comprise grid-connected mode charging, grid-connected mode discharging, isolated grid mode discharging, charging and discharging time and power, operation faults and the like, and the card reader simultaneously has the function of reading the charging quantity value and the operation state of a user; the audio device is used for sending voice prompt for the current operation step information, illustratively, a system enters a grid-connected mode for charging prompt, or a voice alarm is given when a charging and discharging machine system fails or an abnormal condition is detected; the display is used for displaying the running state, charging (discharging) voltage, charging (discharging) current, charging (discharging) time, fault information and the like; the meter is used for the function of bidirectional energy metering.
Optionally, with continued reference to fig. 2, the off-board charging and discharging system further comprises a remote control module 5; the remote control module 5 is in communication connection with the charging control module 4; the remote control module 5 is used for sending a remote control instruction to the charging control module 4, and the charging control module 4 is used for transmitting the remote control instruction to the charging and discharging main control module 1, so that the off-board charging and discharging system works according to the remote control instruction.
For example, to realize the intelligent switching and system safety of the off-board charging and discharging system in the grid-connected mode and the isolated mode, the remote control module 5 may be a microgrid central controller, the microgrid central controller is in communication connection with the charging control module 4, the microgrid central controller has a function of remotely monitoring and controlling the operating state of the off-board charging and discharging system, and the charging control module 4 transmits the operating condition information of the off-board charging and discharging system to the microgrid central controller, wherein the operating condition information includes ac input power supply faults and output faults of the charging and discharging loop module, loop states of the charging and discharging loop module, on/off states, and output voltage and current of the power control module 2. The microgrid central controller comprises a display for displaying running state information, and when the microgrid central controller monitors that field workers cannot normally start or close charging and discharging of the power control module 2, the microgrid central controller sends a remote control instruction for starting or closing the power control module 2 to the charging control module 4; if the power control module 2 cannot normally adjust the power and/or the current, the microgrid central controller 5 sends a remote control instruction for adjusting the power control module 2 to the charging control module 4, adjusts the output power, limits the maximum current and the like; the charging control module 4 transmits the remote control instruction to the charging and discharging main control module 1, and the charging and discharging main control module 1 controls the power control module 2 to work normally.
The microgrid central controller is used for remotely detecting and displaying the running state information of the off-board charging and discharging system on the display, so that remote control personnel can conveniently monitor the running state of the off-board charging and discharging system at any time, and under the condition that the off-board charging and discharging system runs abnormally, the microgrid central controller timely sends a remote control instruction to realize remote control of the off-board charging and discharging system, and the purpose of guaranteeing running safety is achieved.
Optionally, fig. 3 is a circuit diagram of an off-board charging and discharging system in a grid-connected mode and an isolated grid mode according to another embodiment of the present invention, referring to fig. 3, the charging and discharging circuit module 3 further includes a first ac circuit breaker Ka, a second ac circuit breaker Kb, a third ac circuit breaker Kc, and a fourth ac circuit breaker Kd; the first ac circuit breaker Ka, the second ac circuit breaker Kb, the third ac circuit breaker Kc and the fourth ac circuit breaker are all in communication connection (not shown in the figure) with the remote control module 5; the charge and discharge circuit module 3 further comprises a main power supply circuit (not shown in the figure); the first alternating current breaker Ka is electrically connected with a voltage input end of a main power supply loop of a power grid; the second alternating current breaker Kb is electrically connected with the voltage input end of the grid-connected mode charge-discharge loop 331; the third alternating current breaker Kc is electrically connected with the voltage output end of the isolated network mode discharge circuit 332; the fourth alternating current breaker Kd is electrically connected with the voltage output end of the grid-connected mode charge-discharge loop and the voltage input end of the isolated grid mode discharge loop; in a grid-connected charging and discharging mode, the first alternating current circuit breaker Ka, the second alternating current circuit breaker Kb and the fourth alternating current circuit breaker are closed, and the third alternating current circuit breaker Kc is opened; in the isolated network discharging mode, the third ac breaker Kc and the fourth ac breaker Kd are closed, and the first ac breaker Ka and the second ac breaker Kb are opened.
Illustratively, in order to further ensure the electricity utilization safety of the off-board charging and discharging system in the grid-connected mode and the isolated network mode, a first alternating current breaker Ka, a second alternating current breaker Kb, a third alternating current breaker Kc and a fourth alternating current breaker Kd are respectively arranged to be in communication connection with the remote control module 5, and the remote control module 5 monitors the closed state and the open state of the alternating current breakers Ka, Kb, Kc and Kd and controls the states of the alternating current breakers Ka, Kb, Kc and Kd. Illustratively, the remote control module 5 further sets signal lights Ka1, Kb1, Kc1 and Kd1 corresponding to the ac breakers Ka, Kb, Kc and Kd, respectively, the signal lights indicating that Ka, Kb, Kc and Kd are in a closed state, and the signal lights being off indicating that the ac breakers Ka, Kb, Kc and Kd are in an open state. In the grid-connected mode, Ka, Kb and Kd are closed, Kc is disconnected, and the grid-connected mode charge-discharge circuit 331 is connected, so that the bidirectional flow of electric energy between the power grid and the electric automobile is realized; in the isolated network mode, Kc and Kd are closed, Kb and Ka are disconnected, and the isolated network mode discharge loop 332 is turned on, so that the electric vehicle discharges to the electric load. For example, the off-board charging and discharging system operates in a grid-connected mode, the remote control module 5 monitors state information of Ka, Kb, Kc and Kd, and if Ka, Kb, Kc and Kd are simultaneously closed, the remote control module 5 controls Kc to be opened and performs charging and discharging in the grid-connected mode. The off-board charging and discharging system is connected to operate in an isolated network mode, the remote control module 5 monitors that Ka, Kb, Kc and Kd are closed simultaneously, the remote control module 5 controls the Ka and Kb to be disconnected and transmits the closed state communication of the Ka, the Kb, the Kc and the Kd to the billing control module, the billing control module communicates layer by layer to transmit a control instruction for forbidding the isolated network mode to discharge to the power control module, the power control module controls the AC contactor KM1 in the isolated network mode discharge loop to be disconnected, and in the state, the isolated network mode is forbidden to discharge; or the remote control module 5 controls the disconnection of the Ka and the Kb and transmits the communication of the closed states of the Ka, the Kb, the Kc and the Kd to the charging control module, the charging control module transmits a control instruction allowing the isolated network mode to discharge to the power control module in a layer-by-layer communication mode, the power control module controls the AC contactor KM1 in the isolated network mode discharge loop to be closed, and under the state, the isolated network mode discharge is realized; or the remote control module 5 controls Ka and Kb to be disconnected, the power monitoring subunit in the above embodiment monitors an electrical signal of the grid-connected mode charge-discharge circuit, and transmits the electrical signal to the power control module, the power control module determines that the grid-connected mode charge-discharge circuit is not conducted according to the electrical signal, the power control module controls the ac contactor KM1 to be closed, and in this state, discharge in the isolated network mode is realized.
The system comprises a main power supply loop, a grid-connected mode charge-discharge loop, a grid-connected mode discharge loop voltage input end, a Kb, a Kd, a Kb, a Kc and a Kd, wherein the Ka is arranged at the output end of the main power supply loop of a grid power supply and used for controlling the connection and disconnection of alternating current of the grid, the Kb is arranged at the voltage input end of the grid-connected mode charge-discharge loop and used for controlling the connection or disconnection of the grid-connected mode charge-discharge loop 331, the Kc is arranged at the voltage output end of the isolated grid mode discharge loop and used for controlling the connection or disconnection of the isolated grid mode discharge loop 332, the Kd is arranged at the voltage output end of the grid-connected mode charge-discharge loop and the voltage input end of the isolated grid mode discharge loop and used for controlling the grid-connected mode discharge and isolated grid mode discharge of the electric vehicle, and the Ka, the Kb, the Kc and the Kd play a role in protecting the safety of the loop in the grid-connected mode charge-discharge and the isolated grid mode discharge.
Optionally, as a possible embodiment, with reference to fig. 1, more specifically, the grid-connected mode charge-discharge circuit 31 includes a molded case circuit breaker QF and a DC/AC bidirectional converter AC/DC; the isolated network mode discharge circuit 32 comprises an alternating current contactor K3K4, an inverter DC/AC, a fuse FU1\ FU2 and a miniature circuit breaker QF 4; the public loop comprises a lightning protector FVC, a discharge resistor R, a shunt RSX, a direct current contactor K1K2 and a radiator HS; a first end of the first protection subunit 331 is electrically connected with the molded case circuit breaker QF, and a second end of the first protection subunit 331 is electrically connected with the DC/AC bi-directional converter AC/DC; the first end of the second protection subunit 332 is electrically connected with the fuse FU1\ FU2, and the second end of the second protection subunit 332 is electrically connected with the miniature circuit breaker QF 4.
For example, the first protection subunit 331 may be an ac contactor KM, the second protection subunit 332 may be an ac contactor KM1, the ac contactor KM and the ac contactor KM1 have an electrical interlock setting and a software interlock setting, and the ac contactor KM1 are mutually exclusive and cannot be closed at the same time. When the off-board charging and discharging system works in a grid-connected mode, the molded case circuit breaker QF-alternating current contactor KM-direct current/alternating current bidirectional converter AC/DC-lightning protector FVC-discharge resistor R-shunt RSX and the direct current contactor K1K 2-radiator HS-charging and discharging main control module 1 are conducted, and the electric automobile is charged or discharged in the grid-connected mode; when the off-board charging and discharging system works in an isolated network mode, the charging and discharging main control module 1-the direct current contactor K1K 2-the shunt RSX-the discharge resistor R-the alternating current contactor K3K 4-the inverter DC/AC, the fuse FU1\ FU2, the alternating current contactor KM1, the molded case circuit breaker QF and the miniature circuit breaker QF 4-the lightning protector FVC-the radiator HS-are conducted, and the electric automobile is discharged to the electric load. The fuse FU1\ FU2, the lightning protection device FVC, the discharge resistor R, the shunt RSX, the miniature circuit breaker QF4, the alternating current contactors KM and KM1 and the direct current contactor K1K2K3K4 have the functions of direct current overvoltage protection, direct current overcurrent protection, battery reverse connection protection, short circuit protection, alternating current undervoltage/overvoltage protection, alternating current side open-phase/underfrequency/over-frequency protection, island protection and the like, and the radiator HS has the function of radiating heat for a system.
Optionally, the miniature circuit breaker QF4 has the manual start-stop function. Illustratively, when the grid-connected mode is switched to the isolated network mode, the miniature circuit breaker QF4 is additionally arranged, so that the isolated network mode discharge circuit can be manually cut off when the grid-connected mode is in charge-discharge operation, the condition that the grid-connected mode charge-discharge circuit and the isolated network mode discharge circuit are in simultaneous operation to cause the damage of the DC/AC of the inverter is avoided, and the function of multiple protection is achieved, so that the safety of the system is improved.
As a feasible embodiment, the embodiment of the invention also provides a charging pile, which comprises the off-board charging and discharging system of the embodiment and a charging gun; and the charging gun is electrically connected with the electric automobile in a grid-connected charging and discharging mode and an isolated grid discharging mode.
It should be noted that, when the charging gun provided by the embodiment of the invention is used for connecting a charging pile and an electric vehicle to perform charging and discharging operations, the charging gun can change the charging and discharging operation mode without plugging and unplugging the charging gun to switch the grid-connected mode or the isolated network mode, so as to perform the next operation instruction, and realize a technical breakthrough that the charging gun does not need to be plugged and unplugged to seamlessly switch the charging and discharging mode.
Illustratively, the charging pile provided by the embodiment of the invention has a communication function, and the charging pile is communicated and transmitted with a battery management system BMS (battery management system) or a remote control operation platform of the electric vehicle to realize interaction of vehicle charging and discharging parameters and control instructions;
the system has a charging and discharging function, dynamically adjusts charging and discharging operation parameters under a grid-connected mode according to a charging and discharging operation instruction of a user and/or a control instruction of a remote control operation platform, executes corresponding operation, and realizes that the power grid charges an electric vehicle storage battery system or the energy discharged to the power grid by the electric vehicle storage battery system flows in two directions; in the isolated network mode, discharge operation parameters are dynamically adjusted, corresponding operation is executed, and energy feedback of the power storage battery system of the electric automobile to a load is realized;
the intelligent energy-saving control system has the functions of displaying operation parameters, manually inputting the operation parameters, giving an alarm, calculating energy and the like.
In summary, the system control analysis is performed under different working states of the off-board charging and discharging machine in the grid-connected isolated network mode, the comprehensive requirements of the order of the power grid, the order of users and the order of vehicles are safely and efficiently executed, whether the power grid is electrified or not when the load is supplied with power in the isolated network mode is effectively judged, monitoring can be carried out, and the situation that the grid-connected module and the isolated network module work simultaneously can not happen. In addition, the two circuits are also protected by a manually arranged switch.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that the features of the various embodiments of the invention may be partially or fully coupled to each other or combined and may be capable of cooperating with each other in various ways and of being technically driven. Numerous variations, rearrangements, combinations, and substitutions will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (8)

1. A non-vehicle charging and discharging system under a grid-connected mode and an isolated grid mode is characterized by comprising: the charging and discharging control system comprises a charging and discharging main control module, a power control module and a charging and discharging loop module; the charging and discharging loop module comprises a grid-connected mode charging and discharging loop and an isolated network mode discharging loop;
the charge and discharge main control module is used for determining a charge and discharge loop operation mode according to a user demand instruction;
the power control module is in communication connection with the charge-discharge main control module and is used for controlling the grid-connected mode charge-discharge loop to operate according to the charge-discharge loop operation mode so as to enable the power grid circuit to charge the electric automobile or enable the electric automobile to discharge the power grid circuit; or controlling the isolated network mode discharge loop to operate so that the electric automobile discharges to the electric load;
the charging and discharging loop module further comprises a circuit interlocking protection unit, the circuit interlocking protection unit comprises a first protection subunit and a second protection subunit, the first protection subunit is an alternating current contactor KM, and the second protection subunit is an alternating current contactor KM 1; the alternating current contactor KM is arranged in the grid-connected mode charging and discharging loop in series, and the alternating current contactor KM1 is arranged in the isolated grid mode discharging loop in series; the alternating current contactor KM and the alternating current contactor KM1 are both in communication connection with the power control module; the power control module is used for controlling the conduction of the alternating current contactor KM or controlling the conduction of the alternating current contactor KM1 according to the operation mode of the charging and discharging loop; the circuit interlocking protection unit further comprises an interlocking button, and the interlocking button is respectively connected with the alternating current contactor KM and the alternating current contactor KM 1; the interlocking button is used for controlling the conduction of the alternating current contactor KM or controlling the conduction of the alternating current contactor KM 1;
the circuit interlocking protection unit also comprises a power supply monitoring subunit; the power supply monitoring subunit is arranged in the grid-connected mode charge-discharge loop in series and is used for monitoring an electric signal in the grid-connected mode charge-discharge loop; the power control module is in communication connection with the power supply monitoring subunit and is used for controlling the first protection subunit to be conducted or controlling the second protection subunit to be conducted according to the charge-discharge loop operation mode and the electric signal; the power supply monitoring subunit selects three guide rail meters;
the off-board charging and discharging system also comprises a charging control module, and the charging control module is in communication connection with the charging and discharging main control module; the charging control module is used for receiving the user demand instruction and transmitting the user demand instruction to the charging and discharging main control module;
the off-board charging and discharging system further comprises a remote control module; the remote control module is in communication connection with the charging control module; the charging control module is used for transmitting the remote control instruction to the charging control module, and the charging control module is used for transmitting the remote control instruction to the charging and discharging main control module so as to enable the off-board charging and discharging system to work according to the remote control instruction;
the charging and discharging loop module further comprises a first alternating current circuit breaker, a second alternating current circuit breaker, a third alternating current circuit breaker and a fourth alternating current circuit breaker; the first alternating current circuit breaker, the second alternating current circuit breaker, the third alternating current circuit breaker and the fourth alternating current circuit breaker are all in communication connection with the remote control module; the charge-discharge loop module also comprises a main power supply loop of a power grid; the first alternating current breaker is electrically connected with a voltage input end of the power grid power supply main loop; the second alternating current circuit breaker is electrically connected with the voltage input end of the grid-connected mode charge-discharge loop; the third alternating current circuit breaker is electrically connected with the isolated network mode discharge loop voltage output end; the fourth alternating current circuit breaker is electrically connected with the grid-connected mode charging and discharging loop voltage output end and the isolated network mode discharging loop voltage input end; in a grid-connected charging and discharging mode, the first alternating current circuit breaker, the second alternating current circuit breaker and the fourth alternating current circuit breaker are closed, and the third alternating current circuit breaker is opened; and in an isolated grid discharging mode, the third alternating current circuit breaker and the fourth alternating current circuit breaker are closed, and the first alternating current circuit breaker and the second alternating current circuit breaker are opened.
2. The off-board charging and discharging system according to claim 1, wherein the charging and discharging loop module further comprises a main power supply loop and a public loop;
the first end of the main power supply loop of the power grid is electrically connected with the power grid, the second end of the main power supply loop of the power grid is electrically connected with the first end of the grid-connected mode charge-discharge loop, the second end of the grid-connected mode charge-discharge loop is electrically connected with the first end of the public loop, and the second end of the public loop is electrically connected with the charge-discharge main control module;
the first end of the isolated network mode discharge loop is electrically connected with the first end of the common loop, and the second end of the isolated network mode discharge loop is electrically connected with the power load.
3. The off-board charging and discharging system according to claim 2, wherein the grid-tied mode charging and discharging circuit includes a molded case circuit breaker and a dc/ac converter;
the isolated network mode discharge circuit comprises a direct current contactor, an inverter, a fuse and a miniature circuit breaker;
the public loop comprises a lightning protector, a discharge resistor, a shunt, a direct current contactor and a radiator;
the first end of the first protection subunit is electrically connected with the molded case circuit breaker, and the second end of the first protection subunit is electrically connected with the DC/AC converter;
the first end of the second protection subunit is electrically connected with the fuse, and the second end of the second protection subunit is electrically connected with the miniature circuit breaker.
4. The off-board charging and discharging system according to claim 3, wherein the micro breaker is provided with a manual start and stop function.
5. The off-board charging and discharging system according to claim 1, wherein the charging and discharging loop module further comprises an emergency power supply module;
the emergency power supply module is electrically connected with the charging and discharging main control module and the power control module respectively and used for supplying power to the charging and discharging main control module and the power control module.
6. The off-board charging and discharging system according to claim 1, wherein an operating power of the grid-connected mode charging and discharging circuit is different from an operating power of the isolated mode discharging circuit.
7. The off-board charging and discharging system according to claim 1, wherein the billing control module includes an antenna, a card reader, an audio, a display, and a meter.
8. A charging pole comprising the off-board charging and discharging system of any one of claims 1 to 7, and further comprising a charging gun;
and under the grid-connected charging and discharging mode and the isolated grid discharging mode, the charging gun is electrically connected with the electric automobile.
CN202011034955.0A 2020-09-27 2020-09-27 Non-vehicle charging and discharging system in grid-connected mode and isolated grid mode and charging pile Active CN112124132B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005804A (en) * 2009-08-31 2011-04-06 比亚迪股份有限公司 Charging and discharging system of vehicle-mounted battery and control method thereof
CN103595071A (en) * 2013-11-21 2014-02-19 国网上海市电力公司 Energy system of micro-grid
CN108039735A (en) * 2018-01-17 2018-05-15 中兴能源（天津）有限公司 A kind of photovoltaic DC-to-AC converter, the control method of photovoltaic DC-to-AC converter and photovoltaic system
CN109334502A (en) * 2018-09-29 2019-02-15 杭州继高电力技术有限公司 The control of electric car intelligent recharge and discharge and metering device, system and method
JPWO2018084151A1 (en) * 2016-11-01 2019-07-25 本田技研工業株式会社 Server apparatus and control method
CN110943483A (en) * 2019-12-18 2020-03-31 国网智能科技股份有限公司 Micro-grid system and control method
JP2020127357A (en) * 2012-05-29 2020-08-20 三菱電機株式会社 Charge/discharge device and power supply switching system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102005804A (en) * 2009-08-31 2011-04-06 比亚迪股份有限公司 Charging and discharging system of vehicle-mounted battery and control method thereof
JP2020127357A (en) * 2012-05-29 2020-08-20 三菱電機株式会社 Charge/discharge device and power supply switching system
CN103595071A (en) * 2013-11-21 2014-02-19 国网上海市电力公司 Energy system of micro-grid
JPWO2018084151A1 (en) * 2016-11-01 2019-07-25 本田技研工業株式会社 Server apparatus and control method
CN108039735A (en) * 2018-01-17 2018-05-15 中兴能源（天津）有限公司 A kind of photovoltaic DC-to-AC converter, the control method of photovoltaic DC-to-AC converter and photovoltaic system
CN109334502A (en) * 2018-09-29 2019-02-15 杭州继高电力技术有限公司 The control of electric car intelligent recharge and discharge and metering device, system and method
CN110943483A (en) * 2019-12-18 2020-03-31 国网智能科技股份有限公司 Micro-grid system and control method

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