CN114103692A - Charging device capable of expanding small-power charging pile and power allocation method - Google Patents

Charging device capable of expanding small-power charging pile and power allocation method Download PDF

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Publication number
CN114103692A
CN114103692A CN202111334273.6A CN202111334273A CN114103692A CN 114103692 A CN114103692 A CN 114103692A CN 202111334273 A CN202111334273 A CN 202111334273A CN 114103692 A CN114103692 A CN 114103692A
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power
charging
charging pile
charging gun
group
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CN202111334273.6A
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CN114103692B (en
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汤慈全
熊刚
王伟平
陈琪琪
江浩
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Fujian Nebula Electronics Co Ltd
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Fujian Nebula Electronics 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
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • 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
    • 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
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote or cooperative charging

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a charging device and a power allocation method of an extensible low-power charging pile in the technical field of charging piles, wherein the device comprises a high-power direct-current charging pile, a low-power charging pile and a server; the high-power direct-current charging pile comprises a first charging pile controller, a general ammeter, a fuse group, an alternating-current breaker group, an alternating-current power supply filter, a contact group, a filtering module, a three-pole single-throw switch group, a shunt module, a first communication module and a first charging gun; the system comprises a main ammeter, a fuse group, an alternating current breaker group, an alternating current power supply filter, a contact group, a filtering module, a three-pole single-throw switch group, a shunt module and a first charging gun which are sequentially connected; the shunt module, the first communication module and the server are connected with the low-power charging pile; the total electric meter, the alternating current power supply filter, the contact group and the first communication module are connected with the first charging pile controller. The invention has the advantages that: the electric pile construction cost is greatly reduced, and the cable power utilization rate is improved.

Description

Charging device capable of expanding small-power charging pile and power allocation method
Technical Field
The invention relates to the technical field of charging piles, in particular to a charging device and a power allocation method of an extensible low-power charging pile.
Background
The electric vehicle (BEV) is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor to run, meets various requirements of road traffic and safety regulations, and has a wide prospect due to smaller influence on the environment compared with the traditional vehicle. Along with electric automobile's rapid development, each car firm strives for the electric automobile that releases, consequently utilizes to fill electric pile to the demand that electric automobile charges also to present explosive growth.
In order to satisfy the growing demand of charging, more and more charging stations have been built, a charging station includes a plurality of charging pile usually, and wherein there is high-power charging pile also has the low-power charging pile, and each charging pile all acts as go-between alone when the installation is arranged and connects the electric wire netting, and this cable cost and the cost of labor when having increased the installation of charging pile undoubtedly, this part cost finally can be shared each consumer overhead again.
Therefore, how to provide a charging device capable of expanding a low-power charging pile and a power allocation method, which can reduce the construction cost of the charging pile and improve the power utilization rate of a cable, becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a charging device capable of expanding a low-power charging pile and a power allocation method, so that the construction cost of the charging pile is reduced, and the power utilization rate of a cable is improved.
In a first aspect, the present invention provides a charging device capable of expanding a low-power charging pile, including a high-power dc charging pile, a plurality of low-power charging piles and a server;
the high-power direct-current charging pile comprises a first charging pile controller, a general electric meter, a fuse set, an alternating-current breaker set, an alternating-current power supply filter, a contact set, a filtering module, a three-pole single-throw switch set, a shunt module, a first communication module and at least one first charging gun;
the input end of the fuse group is connected with the output end of the main ammeter, and the output end of the fuse group is connected with the input end of the alternating current breaker group; the input end of the alternating current power supply filter is connected with the output end of the alternating current circuit breaker group, and the output end of the alternating current power supply filter is connected with the input end of the contact group; the input end of the filter module is connected with the output end of the contactor group, and the output end of the filter module is connected with the input end of the three-pole single-throw switch group; the input end of the shunt module is connected with the output end of the three-pole single-throw switch group, and the output end of the shunt module is connected with the low-power charging pile and the first charging gun;
the main ammeter, the alternating current power supply filter and the contact group are all connected with the first charging pile controller; one end of the first communication module is connected with the first charging pile controller, and the other end of the first communication module is connected with the low-power charging pile and the server; the server is connected with the low-power charging pile.
Furthermore, the low-power charging pile comprises a second charging pile controller, a power supply module, a second communication module and at least one second charging gun;
the power supply module is respectively connected with the second charging pile controller, the second charging gun and the shunt module; one end of the second communication module is connected with the second charging pile controller, and the other end of the second communication module is connected with the first communication module and the server.
Further, the first communication module and the second communication module are a 2G communication module, a 3G communication module, a 4G communication module, a 5G communication module, an NB-IOT communication module, an LORA communication module, a WIFI communication module, a Bluetooth communication module, a ZigBee communication module or a wired communication module.
Further, the fuse set includes a fuse FU1, a fuse FU2, and a fuse FU 3; the alternating current circuit breaker group comprises a circuit breaker QF1, a circuit breaker QF2 and a circuit breaker QF 3;
one end of the fuse FU1 is connected with a breaker QF1, and the other end of the fuse FU1 is connected with a pin 4 of a general electric meter; one end of the fuse FU2 is connected with a breaker QF2, and the other end of the fuse FU2 is connected with a pin 5 of a main electric meter; one end of the fuse FU3 is connected with the breaker QF3, and the other end of the fuse FU3 is connected with a pin 6 of the general electric meter; the breaker QF1, the breaker QF2 and the breaker QF3 are respectively connected with pins 1, 2 and 3 of the alternating current power supply filter;
the contactor group comprises a contactor KM1, a contactor KM2 and a contactor KM 3; the filter module comprises a capacitor C1, a capacitor C2 and a capacitor C3; the three-pole single-throw switch group comprises a plurality of three-pole single-throw switches;
one end of the contactor KM1 is connected with a pin 4 of an alternating current power supply filter, and the other end of the contactor KM1 is connected with one end of a capacitor C2, one end of a capacitor C3 and a pin 3 of a three-pole single-throw switch; one end of the contactor KM2 is connected with a pin 5 of an alternating current power supply filter, and the other end of the contactor KM2 is connected with the other end of the capacitor C2, one end of the capacitor C1 and a pin 2 of the three-pole single-throw switch; one end of the contactor KM3 is connected with a pin 6 of an alternating current power supply filter, and the other end is connected with the other end of the capacitor C1, the other end of the capacitor C3 and a pin 1 of the three-pole single-throw switch.
Furthermore, the shunt module comprises a plurality of sub-ammeters and a plurality of leakage protection circuit breakers;
one end of each branch ammeter is respectively connected with the three-pole single-throw switch group, and the other end of each branch ammeter is connected with one end of a leakage protection circuit breaker; each the other end of leakage protection circuit breaker is connected with first rifle or the low-power electric pile that charges.
Further, the shunt module comprises a plurality of leakage protection breakers;
each the one end of leakage protection circuit breaker is equallyd divide and is connected with three-pole single-throw switch block, and the other end is connected with first rifle or the low-power electric pile that charges.
In a second aspect, the present invention provides a power allocation method for a charging device of an extensible low-power charging pile, including the following steps:
step S10, the first charging pile controller or the server obtains the total incoming line power P of the total electric meterallLimited power P of the gridall definitionThe first power parameter group of the high-power direct-current charging pile and the second power parameter group of each low-power charging pile;
step S20, secondA charging pile controller or server based on the total incoming line power PallAnd limit the power Pall definitionCalculating chargeable maximum power Pmax；
Step S30, the first charging pile controller or the server based on the first power parameter group, the second power parameter group and the chargeable maximum power PmaxAnd setting the limited power output by each first charging gun and each second charging gun by a first-come-first-charge power distribution method or a proportional charging power distribution method.
Further, in step S10, the first power parameter group includes a required power P of the electric vehicle connected to the first charging gunr direct currentMinimum charging power P of first charging gunm direct current；
The second power parameter group includes a required power P of the electric vehicle connected to the second charging gunr is smallMinimum charging power P of the second charging gunm is small；
In the step S20, the chargeable maximum power PmaxThe calculation formula of (2) is as follows:
Pmax＝min(Pall，Pall definition) Safety factor;
wherein, the value range of the safety factor is (0, 1).
Further, in step S30, the setting of the limited power output by each of the first charging gun and the second charging gun according to the first-come-first-charge power distribution method specifically includes:
step S311, when the electric vehicle is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest total required power P in real timerall：
Prall＝Pr direct current+∑Pr is small；
Step S312, the first charging pile controller or the server judges the total power P requiredrallWhether less than or equal to chargeable maximum power PmaxIf yes, the limited power P of the first charging gun is enabledI direct current＝Pr direct currentLimited power of the second charging gun PI small＝Pr is small；
If not, the limited power of the first charging gun or the second charging gun connected with the last electric vehicle is reduced until the P is metrallIs less than or equal to Pmax。
Further, in step S30, the setting of the limited power output by each of the first charging gun and the second charging gun by the proportional charging power distribution method specifically includes:
step S321, when the electric vehicle is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest total required power P in real timerall：
Prall＝Pr direct current+∑Pr is small；
Step S322, the first charging pile controller or the server judges the total power P requiredrallWhether less than or equal to chargeable maximum power PmaxIf yes, the limited power P of the first charging gun is enabledI direct current＝Pr direct currentLimited power of the second charging gun PI small＝Pr is small(ii) a If not, the process goes to step S323;
step S323, enabling the limited power P of the first charging gunI direct current＝Pmax/Prall*Pr direct currentLimited power of the second charging gun PI small＝Pmax/Prall*Pr is smallJudgment of PI direct currentWhether or not P is greater than or equal tom direct current，PI smallWhether or not P is greater than or equal tom is smallIf yes, setting the limited power; if not, the limited power corresponding to the first charging gun or the second charging gun is set to 0, and after the corresponding first charging gun or the second charging gun is removed, the step S321 is performed to recalculate and distribute the limited power.
The invention has the advantages that:
1. through set up total ammeter in high-power direct current fills electric pile and be connected to the electric wire netting, it is used for shunting the electric energy of total ammeter input to set up the module along separate routes, the electric pile is filled for first rifle or the miniwatt of charging in the output, be equivalent to fill integrated block terminal in electric pile at high-power direct current promptly, the electric pile can directly get the electricity through connecting the module along separate routes in the miniwatt of extension, needn't be like traditional for every fills electric pile and acts as go-between separately and connect the electric wire netting, cable cost and cost of labor have been reduced, the final very big reduction fills electric pile construction cost, cable power utilization has been promoted.
2. Through setting up fuse group and alternating current circuit breaker group, carry out safety protection to the three-phase live wire, automatic fusing or disconnection when the electric current is too big avoids high-power direct current to fill electric pile and miniwatt and fills the super power operation of electric pile, and then very big promotion the security of charging device operation.
3. Through setting up alternating current power supply filter and filtering module, carry out the filtering to the three-phase live wire, reduce electromagnetic interference, and then very big promotion charging device operation's stability.
4. Through setting up the three-pole single-throw switch group including a plurality of three-pole single-throw switch for the module of shunting can be according to the selection of needs and insert three-phase live wire (L1, L2, L3), or only inserts one of them looks live wire, and nimble selection is inserted 220V power or 380V power promptly, very big promotion charging device uses the flexibility.
5. The limited power output by each first charging gun and each second charging gun is set by a first-come first-charge power distribution method or a proportional charging power distribution method, so that the first-come electric automobile can be preferably met or as many electric automobiles can be charged at the same time as required, and the flexibility of power allocation of the charging device is greatly improved.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a schematic circuit block diagram of a charging device of an extensible low-power charging pile according to the present invention.
Fig. 2 is a schematic block diagram of the circuit of the low-power charging pile of the present invention.
Fig. 3 is one of the circuit schematic block diagrams of the splitting module of the present invention.
Fig. 4 is a second schematic block circuit diagram of the splitter module of the present invention.
Fig. 5 is a circuit diagram of a charging device of an extensible low-power charging post according to the present invention.
Fig. 6 is a flowchart of a power allocation method of a charging device of an extensible low-power charging pile according to the present invention.
Description of the labeling:
100-an extensible charging device of a low-power charging pile, 1-a high-power direct-current charging pile, 2-a low-power charging pile, 3-a server, 11-a first charging pile controller, 12-a total electric meter, 13-a fuse set, 14-an alternating-current breaker set, 15-an alternating-current power filter, 16-a contact set, 17-a filtering module, 18-a three-pole single-throw switch set, 19-a shunt module, 20-a first communication module, 30-a first charging gun, 21-a second charging pile controller, 22-a power module, 23-a second communication module, 24-a second charging gun, 181-a three-pole single-throw switch, 191-a branch electric meter and 192-a leakage protection circuit breaker.
Detailed Description
The technical scheme in the embodiment of the application has the following general idea: set up total ammeter 12 in high-power direct current fills electric pile 1 and be connected to the electric wire netting, set up module 19 along separate routes and be used for shunting the electric energy of total ammeter 12 input, let the low power of extension fill electric pile 2 directly get the electricity through connecting module 19 along separate routes, needn't act as go-between for every fills electric pile alone and connect the electric wire netting like traditional to reduce and fill electric pile construction cost, promote cable power utilization.
Referring to fig. 1 to 6, a preferred embodiment of a charging device 100 capable of expanding a small-power charging pile according to the present invention includes a large-power dc charging pile 1, a plurality of small-power charging piles 2, and a server 3; the low-power charging piles 2 comprise alternating current charging piles and low-power direct current charging piles;
the high-power direct-current charging pile 1 comprises a first charging pile controller 11, a general electric meter 12, a fuse set 13, an alternating-current circuit breaker set 14, an alternating-current power supply filter (AC EMC)15, a contact set 16, a filtering module 17, a three-pole single-throw switch set 18, a shunt module 19, a first communication module 20 and at least one first charging gun 30; the first charging pile controller 11 is used for controlling the operation of the high-power direct-current charging pile 1; the general electric meter 12 is used for performing general metering on the electric energy used by the charging device 100; the fuse group 13 is automatically fused when the current of the line is too large, so as to ensure the safety of the operation of the charging device 100; the ac circuit breaker group 14 performs automatic tripping when the current of the line is too large, so as to ensure the safety of the operation of the charging device 100; the ac power filter 15 is configured to attenuate electromagnetic interference, so as to ensure stability of the operation of the charging device 100; the contactor group 16 is used for switching on and off the connection between the alternating current power supply filter 15 and the filtering module 17, and the switching on and off is controlled by the first charging pile controller 11; the filtering module 17 is configured to filter a line; the three-pole single-throw switch group 18 is used for connecting a three-phase live wire or one phase live wire according to requirements; the shunt module 19 is used for shunting the electric energy input by the main electric meter 12; the first communication module 20 is used for communication between the high-power direct-current charging pile 1 and the low-power charging pile 2 or the server 3; the first charging gun 30 is used for outputting power to charge an electric vehicle (not shown);
the input end of the fuse group 13 is connected with the output end of the main ammeter 12, and the output end of the fuse group is connected with the input end of the alternating current breaker group 14; the input end of the alternating current power supply filter 15 is connected with the output end of the alternating current circuit breaker group 14, and the output end of the alternating current power supply filter is connected with the input end of the contact group 16; the input end of the filter module 17 is connected with the output end of the contactor group 16, and the output end is connected with the input end of the three-pole single-throw switch group 18; the input end of the shunt module 19 is connected with the output end of the three-pole single-throw switch group 18, and the output end of the shunt module is connected with the low-power charging pile 2 and the first charging gun 30;
the general electric meter 12, the alternating current power supply filter 15 and the contact group 16 are all connected with the first charging pile controller 11; one end of the first communication module 20 is connected with the first charging pile controller 11, and the other end is connected with the low-power charging pile 2 and the server 3; the server 3 is connected with the low-power charging pile 2.
The low-power charging pile 2 comprises a second charging pile controller 21, a power supply module 22, a second communication module 23 and at least one second charging gun 24; the second charging pile controller 21 is used for controlling the operation of the low-power charging pile 2; the power supply module 22 is used for accessing electric energy output from the high-power direct-current charging pile 1; the second communication module 23 is used for communication between the low-power charging pile 2 and the high-power direct-current charging pile 1 or the server 3; the second charging gun 24 is used for outputting power to charge the electric automobile;
the power module 22 is respectively connected with the second charging pile controller 21, the second charging gun 24 and the shunt module 19; one end of the second communication module 23 is connected to the second charging pile controller 21, and the other end is connected to the first communication module 20 and the server 3.
The first communication module 20 and the second communication module 23 are 2G communication modules, 3G communication modules, 4G communication modules, 5G communication modules, NB-IOT communication modules, LORA communication modules, WIFI communication modules, bluetooth communication modules, ZigBee communication modules or wired communication modules.
The fuse set 13 includes a fuse FU1, a fuse FU2, and a fuse FU 3; the ac circuit breaker group 14 includes a circuit breaker QF1, a circuit breaker QF2 and a circuit breaker QF 3; the fusing speed of the fuse is higher than the tripping speed of the circuit breaker, after the fault is recovered, the fuse needs to be replaced, the circuit breaker only needs to be closed again, the fuse and the circuit breaker have advantages and disadvantages, and the advantages of the fuse and the circuit breaker can be combined, so that the safety of the charging device 100 is guaranteed, and the convenience of maintenance is improved;
one end of the fuse FU1 is connected with a breaker QF1, and the other end of the fuse FU1 is connected with a pin 4 of the general electric meter 12; one end of the fuse FU2 is connected with a breaker QF2, and the other end of the fuse FU2 is connected with a pin 5 of the general electric meter 12; one end of the fuse FU3 is connected with a breaker QF3, and the other end of the fuse FU3 is connected with a pin 6 of the general electric meter 12; the breaker QF1, the breaker QF2 and the breaker QF3 are respectively connected with pins 1, 2 and 3 of the alternating current power supply filter 15; pins 1, 2 and 3 of the general electric meter 12 are respectively connected with three-phase live wires (L1, L2 and L3);
the contactor group 16 comprises a contactor KM1, a contactor KM2 and a contactor KM 3; the filtering module 17 includes a capacitor C1, a capacitor C2, and a capacitor C3; the triple-pole single-throw switch group 18 comprises a plurality of triple-pole single-throw switches 181;
one end of the contactor KM1 is connected with a pin 4 of an alternating current power supply filter 15, and the other end of the contactor KM1 is connected with one end of a capacitor C2, one end of a capacitor C3 and a pin 3 of a three-pole single-throw switch 181; one end of the contactor KM2 is connected with a pin 5 of an alternating current power supply filter 15, and the other end of the contactor KM2 is connected with the other end of a capacitor C2, one end of a capacitor C1 and a pin 2 of a three-pole single-throw switch 181; one end of the contactor KM3 is connected with a pin 6 of an alternating current power supply filter 15, and the other end of the contactor KM3 is connected with the other end of a capacitor C1, the other end of a capacitor C3 and a pin 1 of a three-pole single-throw switch 181; the control ends of the contactor KM1, the contactor KM2 and the contactor KM3 are all connected with the first charging pile controller 11.
The shunt module 19 comprises a plurality of sub-ammeters 191 and a plurality of leakage protection breakers 192;
one end of each electricity distribution meter 191 is respectively connected with the three-pole single-throw switch group 18, and the other end of each electricity distribution meter is connected with one end of a leakage protection circuit breaker 192; the other end of each leakage protection breaker 192 is connected to the first charging gun 30 or the low-power charging pile 2. Each of the electricity distribution meters 191 is connected to the first charging pile controller 11.
The shunt module 18 includes a number of leakage protection breakers 192;
one end of each leakage protection circuit breaker 192 is respectively connected with the three-pole single-throw switch group 18, and the other end of each leakage protection circuit breaker is connected with the first charging gun 30 or the low-power charging pile 2. When the low-power charging pile 2 needs to be connected to a power supply, the low-power charging pile only needs to be connected to the idle leakage protection circuit breaker 192, and the situation that a power grid is connected to each charging pile through a single pull wire in the prior art is avoided.
The invention discloses a preferred embodiment of a power allocation method of a charging device capable of expanding a low-power charging pile, which comprises the following steps:
step S10, the first charging pile controller or the server obtains the total incoming line power P of the total electric meterallLimited power P of the gridall definitionThe first power parameter group of the high-power direct-current charging pile and the second power parameter group of each low-power charging pile; definition of an electrical networkPower Pall definitionThe first charging pile controller is acquired from a server through a first communication module; the second power parameter group is acquired from the low-power charging pile through the first communication module and the second communication module by the first charging pile controller;
step S20, the first charging pile controller or the server based on the total incoming line power PallAnd limit the power Pall definitionCalculating chargeable maximum power Pmax；
Step S30, the first charging pile controller or the server based on the first power parameter group, the second power parameter group and the chargeable maximum power PmaxAnd setting the limited power output by each first charging gun and each second charging gun by a first-come-first-charge power distribution method or a proportional charging power distribution method.
When the power control device is implemented, the limited power output by the first charging gun and the second charging gun can be dynamically set based on different electricity charges in peak-valley periods.
In step S10, the first power parameter group includes a required power P of the electric vehicle connected to the first charging gunr direct currentMinimum charging power P of first charging gunm direct current；
The second power parameter group includes a required power P of the electric vehicle connected to the second charging gunr is smallMinimum charging power P of the second charging gunm is small；
The required power is calculated based on the required voltage and the required current of the electric automobile;
in the step S20, the chargeable maximum power PmaxThe calculation formula of (2) is as follows:
Pmax＝min(Pall，Pall definition) Safety factor; guarantee chargeable maximum power PmaxAlways in a safe power range;
the value range of the safety factor is (0, 1), and preferably 0.95.
In step S30, the setting of the limited power output by each of the first charging gun and the second charging gun by the first-come-first-charge power distribution method specifically includes:
step S311, when the electric vehicle is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest total required power P in real timerall：
Prall＝Pr direct current+∑Pr is small；
Step S312, the first charging pile controller or the server judges the total power P requiredrallWhether less than or equal to chargeable maximum power PmaxIf yes, the limited power P of the first charging gun is enabledI direct current＝Pr direct currentLimited power of the second charging gun PI small＝Pr is small；
If not, the limited power of the first charging gun or the second charging gun connected with the last electric vehicle is reduced until the P is metrallIs less than or equal to Pmax。
In step S30, the setting of the limited power output by each of the first charging gun and the second charging gun by the proportional charging power distribution method specifically includes:
step S321, when the electric vehicle is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest total required power P in real timerall：
Prall＝Pr direct current+∑Pr is small；
Step S322, the first charging pile controller or the server judges the total power P requiredrallWhether less than or equal to chargeable maximum power PmaxIf yes, the limited power P of the first charging gun is enabledI direct current＝Pr direct currentLimited power of the second charging gun PI small＝Pr is small(ii) a If not, the process goes to step S323;
step S323, enabling the limited power P of the first charging gunI direct current＝Pmax/Prall*Pr direct currentLimited power of the second charging gun PI small＝Pmax/Prall*Pr is smallJudgment of PI direct currentWhether or not P is greater than or equal tom direct current，PI smallWhether or not to be greater thanIn Pm is smallIf yes, setting the limited power; if not, the limited power corresponding to the first charging gun or the second charging gun is set to 0, and after the corresponding first charging gun or the second charging gun is removed, the step S321 is performed to recalculate and distribute the limited power.
In summary, the invention has the advantages that:
1. through set up total ammeter in high-power direct current fills electric pile and be connected to the electric wire netting, it is used for shunting the electric energy of total ammeter input to set up the module along separate routes, the electric pile is filled for first rifle or the miniwatt of charging in the output, be equivalent to fill integrated block terminal in electric pile at high-power direct current promptly, the electric pile can directly get the electricity through connecting the module along separate routes in the miniwatt of extension, needn't be like traditional for every fills electric pile and acts as go-between separately and connect the electric wire netting, cable cost and cost of labor have been reduced, the final very big reduction fills electric pile construction cost, cable power utilization has been promoted.
2. Through setting up fuse group and alternating current circuit breaker group, carry out safety protection to the three-phase live wire, automatic fusing or disconnection when the electric current is too big avoids high-power direct current to fill electric pile and miniwatt and fills the super power operation of electric pile, and then very big promotion the security of charging device operation.
3. Through setting up alternating current power supply filter and filtering module, carry out the filtering to the three-phase live wire, reduce electromagnetic interference, and then very big promotion charging device operation's stability.
4. Through setting up the three-pole single-throw switch group including a plurality of three-pole single-throw switch for the module of shunting can be according to the selection of needs and insert three-phase live wire (L1, L2, L3), or only inserts one of them looks live wire, and nimble selection is inserted 220V power or 380V power promptly, very big promotion charging device uses the flexibility.
5. The limited power output by each first charging gun and each second charging gun is set by a first-come first-charge power distribution method or a proportional charging power distribution method, so that the first-come electric automobile can be preferably met or as many electric automobiles can be charged at the same time as required, and the flexibility of power allocation of the charging device is greatly improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.

Claims (10)

1. The utility model provides an extensible miniwatt fills charging device of electric pile which characterized in that: the system comprises a high-power direct-current charging pile, a plurality of low-power charging piles and a server;
the high-power direct-current charging pile comprises a first charging pile controller, a general electric meter, a fuse set, an alternating-current breaker set, an alternating-current power supply filter, a contact set, a filtering module, a three-pole single-throw switch set, a shunt module, a first communication module and at least one first charging gun;
the input end of the fuse group is connected with the output end of the main ammeter, and the output end of the fuse group is connected with the input end of the alternating current breaker group; the input end of the alternating current power supply filter is connected with the output end of the alternating current circuit breaker group, and the output end of the alternating current power supply filter is connected with the input end of the contact group; the input end of the filter module is connected with the output end of the contactor group, and the output end of the filter module is connected with the input end of the three-pole single-throw switch group; the input end of the shunt module is connected with the output end of the three-pole single-throw switch group, and the output end of the shunt module is connected with the low-power charging pile and the first charging gun;
the main ammeter, the alternating current power supply filter and the contact group are all connected with the first charging pile controller; one end of the first communication module is connected with the first charging pile controller, and the other end of the first communication module is connected with the low-power charging pile and the server; the server is connected with the low-power charging pile.
2. The charging device of an extensible small-power charging post of claim 1, wherein: the low-power charging pile comprises a second charging pile controller, a power supply module, a second communication module and at least one second charging gun;
the power supply module is respectively connected with the second charging pile controller, the second charging gun and the shunt module; one end of the second communication module is connected with the second charging pile controller, and the other end of the second communication module is connected with the first communication module and the server.
3. The charging device of an extensible small-power charging post of claim 2, wherein: the first communication module and the second communication module are 2G communication modules, 3G communication modules, 4G communication modules, 5G communication modules, NB-IOT communication modules, LORA communication modules, WIFI communication modules, Bluetooth communication modules, ZigBee communication modules or wired communication modules.
4. The charging device of an extensible small-power charging post of claim 1, wherein: the fuse set comprises a fuse FU1, a fuse FU2 and a fuse FU 3; the alternating current circuit breaker group comprises a circuit breaker QF1, a circuit breaker QF2 and a circuit breaker QF 3;
one end of the fuse FU1 is connected with a breaker QF1, and the other end of the fuse FU1 is connected with a pin 4 of a general electric meter; one end of the fuse FU2 is connected with a breaker QF2, and the other end of the fuse FU2 is connected with a pin 5 of a main electric meter; one end of the fuse FU3 is connected with the breaker QF3, and the other end of the fuse FU3 is connected with a pin 6 of the general electric meter; the breaker QF1, the breaker QF2 and the breaker QF3 are respectively connected with pins 1, 2 and 3 of the alternating current power supply filter;
the contactor group comprises a contactor KM1, a contactor KM2 and a contactor KM 3; the filter module comprises a capacitor C1, a capacitor C2 and a capacitor C3; the three-pole single-throw switch group comprises a plurality of three-pole single-throw switches;
one end of the contactor KM1 is connected with a pin 4 of an alternating current power supply filter, and the other end of the contactor KM1 is connected with one end of a capacitor C2, one end of a capacitor C3 and a pin 3 of a three-pole single-throw switch; one end of the contactor KM2 is connected with a pin 5 of an alternating current power supply filter, and the other end of the contactor KM2 is connected with the other end of the capacitor C2, one end of the capacitor C1 and a pin 2 of the three-pole single-throw switch; one end of the contactor KM3 is connected with a pin 6 of an alternating current power supply filter, and the other end is connected with the other end of the capacitor C1, the other end of the capacitor C3 and a pin 1 of the three-pole single-throw switch.
5. The charging device of an extensible small-power charging post of claim 1, wherein: the shunt module comprises a plurality of branch ammeters and a plurality of leakage protection circuit breakers;
one end of each branch ammeter is respectively connected with the three-pole single-throw switch group, and the other end of each branch ammeter is connected with one end of a leakage protection circuit breaker; each the other end of leakage protection circuit breaker is connected with first rifle or the low-power electric pile that charges.
6. The charging device of an extensible small-power charging post of claim 1, wherein: the shunt module comprises a plurality of leakage protection circuit breakers;
each the one end of leakage protection circuit breaker is equallyd divide and is connected with three-pole single-throw switch block, and the other end is connected with first rifle or the low-power electric pile that charges.
7. A power allocation method of a charging device of an extensible low-power charging pile is characterized in that: the method requires the use of a charging device according to any one of claims 1 to 6, comprising the steps of:
step S10, the first charging pile controller or the server obtains the total incoming line power P of the total electric meterallLimited power P of the gridall definitionThe first power parameter group of the high-power direct-current charging pile and the second power parameter group of each low-power charging pile;
step S20, the first charging pile controller or the server based on the total incoming line power PallAnd limit the power Pall definitionCalculating chargeable maximum power Pmax；
Step S30, the first charging pile controller or the server based on the first power parameter group, the second charging pile controller or the server based on the first power parameter groupTwo power parameter sets and chargeable maximum power PmaxAnd setting the limited power output by each first charging gun and each second charging gun by a first-come-first-charge power distribution method or a proportional charging power distribution method.
8. The power dispatching method of the charging device of the scalable small-power charging pile of claim 7, wherein: in step S10, the first power parameter group includes a required power P of the electric vehicle connected to the first charging gunr direct currentMinimum charging power P of first charging gunm direct current；
The second power parameter group includes a required power P of the electric vehicle connected to the second charging gunr is smallMinimum charging power P of the second charging gunm is small；
In the step S20, the chargeable maximum power PmaxThe calculation formula of (2) is as follows:
Pmax＝min(Pall，Pall definition) Safety factor;
wherein, the value range of the safety factor is (0, 1).
9. The power dispatching method of the charging device of the scalable small-power charging pile of claim 8, wherein: in step S30, the setting of the limited power output by each of the first charging gun and the second charging gun by the first-come-first-charge power distribution method specifically includes:
step S311, when the electric vehicle is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest total required power P in real timerall：
Prall＝Pr direct current+∑Pr is small；
Step S312, the first charging pile controller or the server judges the total power P requiredrallWhether less than or equal to chargeable maximum power PmaxIf yes, the limited power P of the first charging gun is enabledI direct current＝Pr direct currentLimited power of the second charging gun PI small＝Pr is small；
If not, the limited power of the first charging gun or the second charging gun connected with the last electric vehicle is reduced until the P is metrallIs less than or equal to Pmax。
10. The power dispatching method of the charging device of the scalable small-power charging pile of claim 8, wherein: in step S30, the setting of the limited power output by each of the first charging gun and the second charging gun by the proportional charging power distribution method specifically includes:
step S321, when the electric vehicle is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest total required power P in real timerall：
Prall＝Pr direct current+∑Pr is small；
Step S322, the first charging pile controller or the server judges the total power P requiredrallWhether less than or equal to chargeable maximum power PmaxIf yes, the limited power P of the first charging gun is enabledI direct current＝Pr direct currentLimited power of the second charging gun PI small＝Pr is small(ii) a If not, the process goes to step S323;
step S323, enabling the limited power P of the first charging gunI direct current＝Pmax/Prall*Pr direct currentLimited power of the second charging gun PI small＝Pmax/Prall*Pr is smallJudgment of PI direct currentWhether or not P is greater than or equal tom direct current，PI smallWhether or not P is greater than or equal tom is smallIf yes, setting the limited power; if not, the limited power corresponding to the first charging gun or the second charging gun is set to 0, and after the corresponding first charging gun or the second charging gun is removed, the step S321 is performed to recalculate and distribute the limited power.
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