CN111452653A - Intelligent bidirectional charging pile - Google Patents
Intelligent bidirectional charging pile Download PDFInfo
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- CN111452653A CN111452653A CN202010422205.4A CN202010422205A CN111452653A CN 111452653 A CN111452653 A CN 111452653A CN 202010422205 A CN202010422205 A CN 202010422205A CN 111452653 A CN111452653 A CN 111452653A
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- bidirectional
- storage battery
- electric
- converter group
- charging pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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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
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
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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
- B60L53/64—Optimising energy costs, e.g. responding to electricity rates
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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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention relates to the technical field of charging, in particular to an intelligent bidirectional charging pile which comprises a three-phase alternating current power grid, a power frequency transformer, a filter, a bidirectional AC-DC converter group, a bidirectional DC-DC converter group, an electric vehicle storage battery pack, a protection control unit and a battery voltage detection part, wherein the three-phase alternating current power grid is connected with the power frequency transformer; the invention can realize bidirectional electric energy transmission, and the electric automobile can absorb energy from the power grid in the low-ebb period of power consumption and can feed the energy back to the power grid in the high-peak period of power consumption, thereby effectively reducing the peak-valley difference of daily power consumption load, balancing the power consumption demand, fully utilizing the electric energy and avoiding waste.
Description
Technical Field
The invention relates to the technical field of charging, in particular to an intelligent bidirectional charging pile.
Background
In recent years, electric automobiles are more popular with the public, and the electric automobiles become popular transportation tools for people. At present, the electric pile of the electric automobile is a unidirectional charging pile, namely, the electric pile can only be charged to the battery of the electric automobile by a power grid. However, research has revealed that in actual use, a large number of electric vehicles are in an idle state, and the stored electric energy is also in a state of being left unused. The power supply pressure of the power grid is high during the peak period of power utilization, and the energy storage power station is usually manufactured at a high cost to relieve the power supply pressure. Thereby causing a waste of resources.
Disclosure of Invention
The invention aims to provide an intelligent bidirectional charging pile to solve the technical problem of electric energy resource waste in the prior art.
In order to solve the technical problem, the intelligent bidirectional charging pile provided by the invention comprises a three-phase alternating current power grid, a power frequency transformer, a filter, a bidirectional AC-DC converter group, a bidirectional DC-DC converter group, an electric vehicle storage battery pack, a protection control unit and a battery voltage detection part; the three-phase alternating current power grid, the power frequency transformer, the filter, the bidirectional AC-DC converter group, the bidirectional DC-DC converter group and the electric vehicle storage battery pack are electrically connected in sequence;
the battery voltage detection part is electrically connected with the electric automobile storage battery pack and is used for detecting the voltage value of the electric automobile storage battery pack; the protection control unit is electrically connected with a circuit between the bidirectional DC-DC converter group and the storage battery pack of the electric automobile; when the voltage value is higher than a preset value, the protection control unit can cut off a circuit for charging the storage battery pack of the electric automobile by the bidirectional DC-DC converter group.
Furthermore, the invention also comprises an intelligent controller; the filter, the bidirectional AC-DC converter group and the bidirectional DC-DC converter group are all electrically connected with the intelligent controller, and the intelligent controller is used for controlling the working time of the filter, the bidirectional AC-DC converter group and the bidirectional DC-DC converter group.
Further, the intelligent controller is configured to control operating modes of the filter, the bidirectional AC-DC converter group, and the bidirectional DC-DC converter group, so that the three-phase AC power grid charges the electric vehicle storage battery pack or the electric vehicle storage battery pack charges the three-phase AC power grid.
Further, the bidirectional DC-DC converter group includes a plurality of parallel bidirectional DC-DC converters; the electric vehicle storage battery pack comprises a plurality of electric vehicle storage batteries connected in parallel; the bidirectional DC-DC converters are electrically connected with the electric automobile storage batteries in a one-to-one correspondence mode.
Further, the electric vehicle storage battery pack comprises an electric quantity storage unit, an electric quantity detection unit and a charging control unit; the electric quantity detection unit is used for detecting the electric quantity of the electric quantity storage unit; when the electric quantity of the electric storage unit is lower than a preset value, the electric quantity control unit is used for cutting off a circuit between the electric automobile storage battery pack and the bidirectional DC-DC converter so as to prevent the electric automobile storage battery pack from charging the three-phase alternating current power grid.
Further, the bidirectional DC-DC converter group comprises a first bidirectional DC-DC module, a second bidirectional DC-DC module and a third bidirectional DC-DC module; the electric automobile storage battery pack comprises a first electric automobile storage battery, a second electric automobile storage battery and a third electric automobile storage battery; the first, second, and third bidirectional DC-DC modules are electrically connected in parallel; the first electric vehicle battery, the second electric vehicle battery, and the third electric vehicle battery are electrically connected in parallel; one end of the first electric automobile storage battery is electrically connected with the first bidirectional DC-DC module through an inductor, and the other end of the first electric automobile storage battery is connected with the HVDC-electrical end; one end of the second electric automobile storage battery is electrically connected with the second bidirectional DC-DC module through an inductor, and the other end of the second electric automobile storage battery is electrically connected with an HVDC-end; one end of the third electric automobile storage battery is electrically connected with the third bidirectional DC-DC module through an inductor, and the other end of the third electric automobile storage battery is electrically connected with the HVDC-end.
Further, the invention also comprises a wind power generation system and a storage battery pack; the wind power generation system is electrically connected with the power frequency transformer; and the battery storage group is electrically connected with the bidirectional DC-DC converter group and is used for storing the electric quantity of the wind power generation system.
Furthermore, the invention also comprises a charging pile body; the charging pile comprises a charging pile body and a bidirectional AC-DC converter group, wherein the charging pile body is cuboid, a base is fixed at the bottom of the charging pile body, and the bidirectional AC-DC converter group, the bidirectional DC-DC converter group, a protection control unit and a battery voltage detection part are all arranged in the charging pile body.
Furthermore, one side of the charging pile body is provided with a display screen, and the other side of the charging pile body is provided with a connecting socket which is used for electrically connecting the storage battery pack of the electric automobile with the bidirectional DC-DC converter group.
Further, a switch is arranged below the display screen.
By adopting the technical scheme, the invention has the following beneficial effects:
the intelligent bidirectional charging pile, the bidirectional AC-DC converter group and the bidirectional DC-DC converter group provided by the invention can realize bidirectional charging. The two modes are selected to realize the current flow direction, the three-phase alternating current network is charged to the storage battery pack of the electric automobile through the bidirectional AC-DC converter group and the bidirectional DC-DC converter group, or the storage battery pack of the electric automobile is charged to the three-phase alternating current network through the bidirectional AC-DC converter group and the bidirectional DC-DC converter group. The intelligent bidirectional charging pile provided by the invention can enable the storage battery pack of the electric automobile to have two modes of charging and discharging, the storage battery pack of the electric automobile stores the electric energy of a three-phase alternating current power grid in the storage battery in the charging mode, and the electric energy stored in the battery is fed back to the power grid in the discharging mode to supply energy to the power grid. The intelligent bidirectional charging pile provided by the invention can realize charging and discharging of the storage battery, can reduce the power consumption pressure caused by vigorously developing electric vehicles, and simultaneously reduces the construction of a peak-shaving frequency-modulation power plant special for a power grid, balances the energy requirement and maintains the stability of the power grid. Meanwhile, the method can be used for load standby, overhaul standby, accident standby, black start and the like of the power system, benefits are created for users, electric energy which is charged by the users in advance in the off-peak electricity period is sold to a power company in the peak electricity utilization period, and peak-to-off electricity price difference can be earned. That is, the electric automobile can absorb energy from the power grid in the power consumption valley period, and can feed the energy back to the power grid in the power consumption peak period, so that the daily power consumption load peak-valley difference can be effectively reduced, the power consumption requirement is balanced, the electric energy is fully utilized, and the waste is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of an intelligent bidirectional charging pile according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an intelligent bidirectional charging pile according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an intelligent bidirectional charging pile according to another embodiment of the present invention.
Reference numbers: 1-a three-phase alternating current grid; 2-a power frequency transformer; 3-a filter; a 4-bidirectional AC-DC converter group; a 5-bidirectional DC-DC converter group; 6-a protection control unit; 7-a battery voltage detection part; 8-an intelligent controller; 9-electric vehicle battery pack; 10-a battery storage pack; 11-a wind power generation system; 12-a display screen; 13-a connection socket; 14-a switch; 15-a base; 16-charging pile body.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be further explained with reference to specific embodiments.
Fig. 1 is a schematic diagram of an intelligent bidirectional charging pile provided in an embodiment of the present invention, and as shown in fig. 1, the intelligent bidirectional charging pile provided in this embodiment includes a three-phase AC power grid 1, a power frequency transformer 2, a filter 3, a bidirectional AC-DC converter group 4, a bidirectional DC-DC converter group 5, an electric vehicle storage battery group 9, a protection control unit 6, and a battery voltage detection unit 7; the three-phase alternating current power grid 1, the power frequency transformer 2, the filter 3, the bidirectional AC-DC converter group 4, the bidirectional DC-DC converter group 5 and the electric vehicle storage battery pack 9 are electrically connected in sequence; the battery voltage detection part 7 is electrically connected with the electric automobile storage battery pack 9 and is used for detecting the voltage value of the electric automobile storage battery pack 9; the protection control unit 6 is electrically connected with a circuit between the bidirectional DC-DC converter group 5 and the storage battery pack 9 of the electric automobile; when the voltage value is higher than a preset value, the protection control unit 6 can cut off the circuit of the bidirectional DC-DC converter group 5 for charging the storage battery pack 9 of the electric vehicle.
The power frequency transformer 2 plays roles of isolating and increasing and decreasing voltage, plays a role of increasing and decreasing voltage in the charging process and plays a role of decreasing voltage in the discharging process; the filter 3 plays a role of filtering; the bidirectional AC-DC converter group 4 can realize sine rectification, an active power factor correction function and output voltage control in the charging process, so that the influence on a power grid in the charging process is reduced to the minimum, and in the discharging process, the bidirectional AC-DC converter group 4 can realize direct current inversion, grid-connected connection, output current control and isolated island protection, so that the energy of a battery is fed back to the power grid; the bidirectional DC-DC converter group 5 mainly regulates the magnitude of current charged and discharged by the storage battery pack 9 of the electric automobile. When the protection control unit 6 is used in cooperation with the battery voltage detection part 7 and the voltage of the electric automobile storage battery pack 9 detected by the battery voltage detection part 7 is higher than a preset value in the battery charging mode, the protection control unit 6 controls the circuit to be cut off, so that the charging of the electric automobile storage battery pack is stopped, the overshoot protection effect is achieved, the electric automobile storage battery pack 9 is protected, and the service life of the battery is prolonged.
The intelligent bidirectional charging pile provided by the invention has the advantages that bidirectional charging can be realized by the bidirectional AC-DC converter group 4 and the bidirectional DC-DC converter group 5. The two modes can realize the current flow direction by selecting different direction modes, and the three-phase alternating current power grid 1 can charge the storage battery pack of the electric automobile through the bidirectional AC-DC converter group 4 and the bidirectional DC-DC converter group 5, or the storage battery pack of the electric automobile can charge the three-phase alternating current power grid 1 through the bidirectional AC-DC converter group 4 and the bidirectional DC-DC converter group 5. That is, the intelligent bidirectional charging pile provided by the invention can enable the storage battery pack 9 of the electric vehicle to have two modes of charging and discharging, when the storage battery pack 9 of the electric vehicle is in the charging mode, the electric energy of the three-phase alternating current network 1 is stored in the storage battery, and when the storage battery pack is in the discharging mode, the electric energy stored in the storage battery is fed back to the power grid to supply power to the power grid.
The intelligent bidirectional charging pile provided by the invention can realize charging and discharging of the storage battery, can reduce the power consumption pressure caused by vigorously developing electric vehicles, and simultaneously reduces the construction of a peak-shaving frequency-modulation power plant special for a power grid, balances the energy requirement and maintains the stability of the power grid. Meanwhile, the method can be used for load standby, overhaul standby, accident standby, black start and the like of the power system, benefits are created for users, electric energy which is charged by the users in advance in the valley electricity period is sold to a power company in the peak electricity utilization period, and peak-valley electricity price difference can be earned.
On the basis of the above embodiment, the present invention further includes an intelligent controller 8; the filter 3, the bidirectional AC-DC converter group 4 and the bidirectional DC-DC converter group 5 are all electrically connected with the intelligent controller 8, and the intelligent controller 8 is used for controlling the working time of the three. The service time of charging piles can be set in advance, the intelligent controller 8 controls the three to be in the working mode within the preset time, and the three is in the working stopping mode when the intelligent controller is not in the preset time.
On the basis of the above embodiment, further, the intelligent controller 8 is configured to control the operation modes of the filter 3, the bidirectional AC-DC converter group 4 and the bidirectional DC-DC converter group 5, so that the three-phase AC power grid 1 charges the electric vehicle battery pack 9 or the electric vehicle battery pack 9 charges the three-phase AC power grid 1. That is, the intelligent controller 8 controls the charge and discharge modes of the battery, and the user can implement mode selection through an external operation key or an operation screen.
On the basis of the above embodiment, further, the bidirectional DC-DC converter group 5 includes a plurality of parallel bidirectional DC-DC converters; the electric vehicle storage battery pack 9 comprises a plurality of electric vehicle storage batteries connected in parallel; the bidirectional DC-DC converters are electrically connected with the electric automobile storage batteries in a one-to-one correspondence mode. The storage battery of the electric automobile can be charged, and the use is convenient.
On the basis of the above embodiment, further, the electric vehicle battery pack 9 includes an electric quantity storage unit, an electric quantity detection unit, and a charging control unit; the electric quantity detection unit is used for detecting the electric quantity of the electric quantity storage unit; when the electric quantity of the electric storage unit is lower than a preset value, the electric quantity control unit is used for cutting off a circuit between the electric vehicle storage battery pack 9 and the bidirectional DC-DC converter so as to prevent the electric vehicle storage battery pack 9 from charging the three-phase alternating current power grid 1. Therefore, when the electric quantity of the battery is low, the battery is controlled not to supply power to the three-phase alternating current power grid 1, so that the battery can store enough reserved electric quantity of the battery, and the battery is protected and is convenient to use.
On the basis of the above embodiment, further, the bidirectional DC-DC converter group includes a first bidirectional DC-DC module, a second bidirectional DC-DC module, and a third bidirectional DC-DC module; the electric automobile storage battery pack comprises a first electric automobile storage battery, a second electric automobile storage battery and a third electric automobile storage battery; the first bidirectional DC-DC module, the second bidirectional DC-DC module and the third bidirectional DC-DC module are electrically connected in parallel; the first electric vehicle storage battery, the second electric vehicle storage battery and the third electric vehicle storage battery are electrically connected in parallel; one end of the first electric automobile storage battery is electrically connected with the first bidirectional DC-DC module through an inductor, and the other end of the first electric automobile storage battery is connected with the HVDC-electric end; one end of a second electric automobile storage battery is electrically connected with the second bidirectional DC-DC module through an inductor, and the other end of the second electric automobile storage battery is electrically connected with the HVDC-end; one end of the third electric automobile storage battery is electrically connected with the third bidirectional DC-DC module through an inductor, and the other end of the third electric automobile storage battery is electrically connected with the HVDC-end.
In this embodiment, when the electric quantity of first electric automobile battery is more than the electric quantity of second electric automobile battery, the electric quantity of first electric automobile battery can charge to second electric automobile battery, and its charging circuit is: one end of the first electric vehicle storage battery is electrically connected with one end of the first bidirectional DC-DC module through an inductor; the other end of the first bidirectional DC-DC module is electrically connected with one end of the second bidirectional DC-DC module; the other end of the second bidirectional DC-DC module is electrically connected with one end of a second electric automobile storage battery through an inductor, so that a charging loop is formed.
Fig. 2 is a schematic diagram of an intelligent bidirectional charging pile according to another embodiment of the present invention, as shown in fig. 2, on the basis of the foregoing embodiment, further, the present embodiment further includes a wind power generation system 11 and a battery storage group 10; the wind power generation system 11 is electrically connected with the power frequency transformer 2; the battery storage group 10 is electrically connected with the bidirectional DC-DC converter group 5 and is used for storing the electric quantity of the wind power generation system 11.
In this embodiment, the electric energy of the wind power generation system 11 is processed by the power frequency transformer 2, and finally charged to the storage battery pack 9 of the electric vehicle through the filter 3, the bidirectional AC-DC converter group 4, and the bidirectional DC-DC converter group 5. When the wind power generation system 11 generates more power, the redundant power generated by the wind power generation system 11 is charged to the storage battery group 10 for storage and standby, and when more electric vehicles need to be charged and the storage battery group 9 of the electric vehicle cannot supply sufficient power, the power in the storage battery can be utilized to ensure the power utilization of users.
Fig. 3 is a schematic structural diagram of an intelligent bidirectional charging pile according to another embodiment of the present invention, as shown in fig. 3, on the basis of the foregoing embodiment, further, the present embodiment further includes a charging pile body 16; the charging pile body 16 is rectangular, a base 15 is fixed at the bottom of the charging pile body 16, and the bidirectional AC-DC converter group 4, the bidirectional DC-DC converter group 5, the protection control unit 6 and the battery voltage detection part 7 are all arranged in the charging pile body 16.
On the basis of the above embodiment, further, one side of the charging pile body 16 is provided with a display screen 12, and the other side is provided with a connection socket 13, and the connection socket 13 is used for electrically connecting the electric vehicle storage battery pack 9 and the bidirectional DC-DC converter group 5. A switch 14 is provided below the display 12.
In this embodiment, the user passes through the connecting wire with electric automobile storage battery 9 and is connected with connection socket 13, opens switch 14, and display screen 12 lights, and the user can carry out the operation selection mode (the mode of charging or discharging) on display screen 12, and the back that finishes of the operation, with electric automobile storage battery 9 from filling electric pile body 16 pull out can, convenient operation.
In conclusion, the intelligent bidirectional charging pile provided by the invention can realize bidirectional electric energy transmission, and the electric automobile can absorb energy from the power Grid in the low-ebb period of power consumption and can feed the energy back to the power Grid in the peak period of power consumption, so that the peak-valley difference of daily power consumption load can be effectively reduced, namely the V2G (Vehicle-to-Grid) technology. The V2G technology realizes bidirectional, real-time and controllable energy transmission. The bidirectional transmission of the electric energy means that the electric automobile can feed back the electric energy to the power grid when the power grid needs besides the electric energy transmitted to the electric automobile by the power grid, and the charging pile in the prior art cannot meet the requirement.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An intelligent bidirectional charging pile is characterized by comprising a three-phase alternating current power grid, a power frequency transformer, a filter, a bidirectional AC-DC converter group, a bidirectional DC-DC converter group, an electric vehicle storage battery pack, a protection control unit and a battery voltage detection part;
the three-phase alternating current power grid, the power frequency transformer, the filter, the bidirectional AC-DC converter group, the bidirectional DC-DC converter group and the electric vehicle storage battery pack are electrically connected in sequence;
the battery voltage detection part is electrically connected with the electric automobile storage battery pack and is used for detecting the voltage value of the electric automobile storage battery pack; the protection control unit is electrically connected with a circuit between the bidirectional DC-DC converter group and the storage battery pack of the electric automobile; when the voltage value is higher than a preset value, the protection control unit can cut off a circuit for charging the storage battery pack of the electric automobile by the bidirectional DC-DC converter group.
2. The intelligent bidirectional charging pile of claim 1, further comprising an intelligent controller;
the filter, the bidirectional AC-DC converter group and the bidirectional DC-DC converter group are all electrically connected with the intelligent controller, and the intelligent controller is used for controlling the working time of the filter, the bidirectional AC-DC converter group and the bidirectional DC-DC converter group.
3. The intelligent bidirectional charging pole according to claim 2, wherein the intelligent controller is configured to control the operation modes of the filter, the bidirectional AC-DC converter group and the bidirectional DC-DC converter group, so that the three-phase AC power grid charges the electric vehicle storage battery pack or the electric vehicle storage battery pack charges the three-phase AC power grid.
4. The intelligent bidirectional charging pole according to claim 3, wherein the bidirectional DC-DC converter group comprises a plurality of parallel bidirectional DC-DC converters; the electric vehicle storage battery pack comprises a plurality of electric vehicle storage batteries connected in parallel; the bidirectional DC-DC converters are electrically connected with the electric automobile storage batteries in a one-to-one correspondence mode.
5. The intelligent bidirectional charging pile according to claim 4, wherein the electric vehicle storage battery pack comprises an electric quantity storage unit, an electric quantity detection unit and a charging control unit; the electric quantity detection unit is used for detecting the electric quantity of the electric quantity storage unit; when the electric quantity of the electric storage unit is lower than a preset value, the electric quantity control unit is used for cutting off a circuit between the electric automobile storage battery pack and the bidirectional DC-DC converter so as to prevent the electric automobile storage battery pack from charging the three-phase alternating current power grid.
6. The intelligent bidirectional charging pole according to claim 5, wherein the bidirectional DC-DC converter group comprises a first bidirectional DC-DC module, a second bidirectional DC-DC module and a third bidirectional DC-DC module; the electric automobile storage battery pack comprises a first electric automobile storage battery, a second electric automobile storage battery and a third electric automobile storage battery; the first, second, and third bidirectional DC-DC modules are electrically connected in parallel; the first electric vehicle battery, the second electric vehicle battery, and the third electric vehicle battery are electrically connected in parallel; one end of the first electric automobile storage battery is electrically connected with the first bidirectional DC-DC module through an inductor, and the other end of the first electric automobile storage battery is connected with the HVDC-electrical end; one end of the second electric automobile storage battery is electrically connected with the second bidirectional DC-DC module through an inductor, and the other end of the second electric automobile storage battery is electrically connected with an HVDC-end; one end of the third electric automobile storage battery is electrically connected with the third bidirectional DC-DC module through an inductor, and the other end of the third electric automobile storage battery is electrically connected with the HVDC-end.
7. The intelligent bidirectional charging pile according to claim 1, further comprising a wind power generation system and a storage battery pack;
the wind power generation system is electrically connected with the power frequency transformer; and the battery storage group is electrically connected with the bidirectional DC-DC converter group and is used for storing the electric quantity of the wind power generation system.
8. The intelligent bidirectional charging pile according to claim 1, further comprising a charging pile body;
the charging pile comprises a charging pile body and a bidirectional AC-DC converter group, wherein the charging pile body is cuboid, a base is fixed at the bottom of the charging pile body, and the bidirectional AC-DC converter group, the bidirectional DC-DC converter group, a protection control unit and a battery voltage detection part are all arranged in the charging pile body.
9. The intelligent bidirectional charging pile according to claim 8, wherein a display screen is arranged on one side of the charging pile body, and a connection socket is arranged on the other side of the charging pile body and used for electrically connecting the storage battery pack of the electric vehicle and the bidirectional DC-DC converter set.
10. The intelligent bidirectional charging pile according to claim 9, characterized in that a switch is arranged below the display screen.
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| CN202010422205.4A CN111452653A (en) | 2020-05-19 | 2020-05-19 | Intelligent bidirectional charging pile |
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| CN202010422205.4A CN111452653A (en) | 2020-05-19 | 2020-05-19 | Intelligent bidirectional charging pile |
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