CN114103692B - Charging device of extensible low-power charging pile and power allocation method - Google Patents
Charging device of extensible low-power charging pile and power allocation method Download PDFInfo
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- CN114103692B CN114103692B CN202111334273.6A CN202111334273A CN114103692B CN 114103692 B CN114103692 B CN 114103692B CN 202111334273 A CN202111334273 A CN 202111334273A CN 114103692 B CN114103692 B CN 114103692B
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Classifications
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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
- B60L53/60—Monitoring or controlling 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
- 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
- Y02T10/80—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
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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
- Y02T90/16—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]
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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
- 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 total ammeter, a fuse set, an alternating-current breaker set, an alternating-current power supply filter, a contactor set, a filtering module, a three-pole single-throw switch set, a branching module, a first communication module and a first charging gun; the main ammeter, the fuse set, the alternating current circuit breaker set, the alternating current power supply filter, the contactor set, the filter module, the three-pole single-throw switch set, the branching module and the first charging gun are connected in sequence; the shunt module, the first communication module and the server are connected with the low-power charging pile; the total ammeter, the alternating current power supply filter, the contactor group and the first communication module are connected with the first charging pile controller. The invention has the advantages that: the construction cost of the charging pile is greatly reduced, and the power utilization rate of the cable is improved.
Description
Technical Field
The invention relates to the technical field of charging piles, in particular to a charging device of an extensible low-power charging pile and a power allocation method.
Background
Electric Vehicles (BEV) are vehicles which use a vehicle-mounted power supply as power and drive wheels by a motor to run, and meet various requirements of road traffic and safety regulations, and have a smaller influence on the environment than the traditional vehicles, so that the BEV has a wide prospect. Along with the rapid development of electric vehicles, various automobile manufacturers strive for and push out electric vehicles, so that the requirement of charging electric vehicles by using charging piles also presents explosive growth.
In order to meet the increasing charging demands, more and more charging stations are built, one charging station usually comprises a plurality of charging piles, wherein a high-power charging pile and a low-power charging pile are arranged, each charging pile is independently pulled to be connected with a power grid when being installed and arranged, and the cable cost and the labor cost of the charging piles are obviously increased, and the cost is finally shared among consumers.
Therefore, how to provide a charging device and a power allocation method for an expandable low-power charging pile, so as to 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 and a power allocation method for an extensible low-power charging pile, which can reduce the construction cost of the charging pile and improve the power utilization rate of a cable.
In a first aspect, the present invention provides a charging device for an expandable 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 total electricity meter, a fuse set, an alternating-current breaker set, an alternating-current power supply filter, a contactor set, a filtering module, a three-pole single-throw switch set, a branching module, a first communication module and at least one first charging gun;
the input end of the fuse set is connected with the output end of the total ammeter, and the output end of the fuse set is connected with the input end of the alternating current breaker set; the input end of the alternating current power supply filter is connected with the output end of the alternating current breaker group, and the output end of the alternating current power supply filter is connected with the input end of the contactor group; the input end of the filtering module is connected with the output end of the contactor group, and the output end of the filtering module is connected with the input end of the three-pole single-throw switch group; the input end of the branching module is connected with the output end of the three-pole single-throw switch group, and the output end of the branching 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 contactor 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.
Further, the low-power charging pile comprises a second charging pile controller, a power module, a second communication module and at least one second charging gun;
the power module is respectively connected with the second charging pile controller, the second charging gun and the branching 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, a 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 FU3; the alternating current breaker group comprises a breaker QF1, a breaker QF2 and a breaker QF3;
one end of the fuse FU1 is connected with the breaker QF1, and the other end of the fuse FU1 is connected with a pin 4 of the total ammeter; one end of the fuse FU2 is connected with the breaker QF2, and the other end of the fuse FU2 is connected with a pin 5 of the total ammeter; one end of the fuse FU3 is connected with the breaker QF3, and the other end of the fuse FU is connected with a pin 6 of the total ammeter; the circuit breaker QF1, the circuit breaker QF2 and the circuit 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 KM3; the filtering 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 the alternating current power supply filter, and the other end of the contactor KM 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 the alternating current power supply filter, and the other end of the contactor 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 the alternating current power supply filter, and the other end of the contactor KM is connected with the other end of the capacitor C1, the other end of the capacitor C3 and the pin 1 of the three-pole single-throw switch.
Further, the branching module comprises a plurality of branch electric meters and a plurality of drain protection circuit breakers;
one end of each sub-ammeter is respectively connected with the three-pole single-throw switch group, and the other end of each sub-ammeter is connected with one end of a leakage protection breaker; the other end of each drain protection circuit breaker is connected with a first charging gun or a low-power charging pile.
Further, the branching module comprises a plurality of drain protection breakers;
one end of each leakage protection circuit breaker is connected with the three-pole single-throw switch group respectively, and the other end of each leakage protection circuit breaker is connected with the first charging gun or the low-power charging pile.
In a second aspect, the present invention provides a power allocation method for a charging device of an expandable low-power charging pile, including the following steps:
step S10, a first charging pile controller or a server acquires total incoming line power P of a total ammeter all Limiting power P of power grid all definition A first power parameter set of the high-power direct-current charging pile and a second power parameter set of each low-power charging pile;
step S20, the first charging pile controller or the server is based on the total incoming line power P all Defining a power P all definition Calculating chargeable maximum power P max ；
Step S30, the first charging pile controller or the server based on the first power parameter set, the second power parameter set and the chargeable maximum power P max The limited power output by each first charging gun and each second charging gun is set by a first-come-first charging power distribution method or a proportional charging power distribution method.
Further, in the step S10, the first power parameter set includes a required power P of the electric vehicle connected to the first charging gun r direct current Minimum charging power P of first charging gun m DC ；
The second power parameter set comprises the required power P of the electric automobile connected to the second charging gun r is small Minimum charging power P of second charging gun m is small ；
In the step S20, the rechargeable maximum power P max The calculation formula of (2) is as follows:
P max ＝min(P all ，P all definition ) Safety factor;
wherein the value range of the safety coefficient is (0, 1).
Further, in the step S30, the setting 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 an 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 required total power P in real time rall ：
P rall ＝P r direct current +∑P r is small ；
Step S312, the first charging pile controller or the server determines the total power P rall Whether or not to be less than or equal to the chargeable maximum power P max If so, let the limit power P of the first charging gun I DC ＝P r direct current Limited power P of the second charging gun I is small ＝P r is small ；
If not, the limited power of the first charging gun or the second charging gun connected with the last electric automobile is reduced until P is met rall Less than or equal to P max 。
Further, in the step S30, the setting 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 an electric automobile is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest required total power P in real time rall ：
P rall ＝P r direct current +∑P r is small ；
Step S322, the first charging pile controller or the server determines the total power P rall Whether or not to be less than or equal to the chargeable maximum power P max If so, let the limit power P of the first charging gun I DC ＝P r direct current Limited power P of the second charging gun I is small ＝P r is small The method comprises the steps of carrying out a first treatment on the surface of the If not, go to step S323;
step S323, limiting the power P of the first charging gun I DC ＝P max /P rall *P r direct current Limited power P of the second charging gun I is small ＝P max /P rall *P r is small Judgment of P I DC Whether or not it is greater than or equal to P m DC ，P I is small Whether or not it is greater than or equal to P m is small If yes, finishing the setting of the limited power; if not, setting the limiting power of the corresponding first charging gun or the corresponding second charging gun to 0, eliminating the corresponding first charging gun or the corresponding second charging gun, and then entering step S321 to perform the recalculation and distribution of the limiting power.
The invention has the advantages that:
1. through setting up total ammeter in high-power direct current fills electric pile and being connected to the electric wire netting, set up the branching module and be used for shunting the electric energy of total ammeter input, output is for first rifle or low-power fills electric pile that fills, be equivalent to at high-power direct current fills electric pile in integrated block terminal promptly, the low-power of extension fills electric pile and can directly get the electricity through connecting the branching module, need not be like traditional for every fills electric pile and act as go-between alone and connect the electric wire netting, cable cost and cost of labor have been reduced, final very big reduction fills electric pile construction cost, cable power utilization ratio has been promoted.
2. Through setting up fuse group and alternating current 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 the super power operation of electric pile and miniwatt to fill electric pile, and then very big promotion the security of charging device operation.
3. Through setting up alternating current power supply wave filter and filtering module, carry out the wave filtering to three-phase live wire, reduce electromagnetic interference, and then very big promotion charging device's stability of operation.
4. Through setting up the triple single throw switch group including a plurality of triple single throw switch for the branch road module can select to insert three-phase live wire (L1, L2, L3) as required, perhaps only inserts one of them looks live wire, promptly nimble choice insert 220V power or 380V power, very big promotion charging device application flexibility.
5. The limited power output by each first charging gun and each second charging gun is set through a first-come-first-charging power distribution method or a proportional charging power distribution method, so that whether the first-come electric automobile is preferably met or as many electric automobiles as possible are charged at the same time can be selected according to the requirements, and the flexibility of power allocation of the charging device is greatly improved.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of a charging device of the present invention for an expandable low-power charging post.
Fig. 2 is a schematic block diagram of the circuit of the low power charging stake of the invention.
Fig. 3 is one of the schematic circuit blocks of the branching module of the present invention.
Fig. 4 is a second schematic block diagram of the branching module of the present invention.
Fig. 5 is a circuit diagram of a charging device of the scalable low-power charging post of the present invention.
Fig. 6 is a flowchart of a power deployment method of a charging device of an expandable low-power charging pile according to the present invention.
Marking:
100-a charging device of an extensible 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 ammeter, 13-a fuse set, 14-an alternating-current breaker set, 15-an alternating-current power supply filter, 16-a contactor set, 17-a filter 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 ammeter and 192-a leakage protection breaker.
Detailed Description
According to the technical scheme in the embodiment of the application, the overall thought is as follows: the main ammeter 12 is arranged in the high-power direct-current charging pile 1 and connected to a power grid, the shunt module 19 is arranged to shunt electric energy input by the main ammeter 12, the expanded low-power charging pile 2 is enabled to directly take electricity through the connection shunt module 19, and the situation that each charging pile is independently pulled to be connected with the power grid as in the prior art is avoided, so that the construction cost of the charging pile is reduced, and the power utilization rate of a cable is improved.
Referring to fig. 1 to 6, a charging device 100 of the present invention, which is a charging device with expandable low-power charging piles, includes a high-power dc charging pile 1, a plurality of low-power charging piles 2 and a server 3; the low-power charging pile 2 comprises an alternating-current charging pile and a low-power direct-current charging pile;
the high-power direct-current charging pile 1 comprises a first charging pile controller 11, a total ammeter 12, a fuse set 13, an alternating-current breaker set 14, an alternating-current power supply filter (AC EMC) 15, a contactor set 16, a filtering module 17, a three-pole single-throw switch set 18, a branching 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 total electricity meter 12 is used for total metering of the electric energy used by the charging device 100; the fuse set 13 automatically fuses when the current of the circuit is too large, so as to ensure the operation safety of the charging device 100; the ac breaker group 14 performs automatic tripping when the current of the line is excessive, so as to ensure the operation safety of the charging device 100; the ac power filter 15 is configured to attenuate electromagnetic interference to ensure the stability of the operation of the charging device 100; the contactor group 16 is used for connecting the on-off alternating current power supply filter 15 with the filter module 17, and the on-off is controlled by the first charging pile controller 11; the filtering module 17 is used for filtering the line; the three-pole single-throw switch group 18 is used for being connected with a three-phase live wire or one phase of live wire as required; the branching module 19 is used for branching the electric energy input by the total 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 set 13 is connected with the output end of the main ammeter 12, and the output end is connected with the input end of the alternating current breaker set 14; the input end of the alternating current power supply filter 15 is connected with the output end of the alternating current breaker group 14, and the output end is connected with the input end of the contactor group 16; the input end of the filtering 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 branching module 19 is connected with the output end of the three-pole single-throw switch group 18, and the output end is connected with the low-power charging pile 2 and the first charging gun 30;
the main ammeter 12, the alternating current power supply filter 15 and the contactor set 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 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 work of the low-power charging pile 2; the power module 22 is used for connecting the electric energy output by 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 branching 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 FU3; the ac breaker group 14 includes a breaker QF1, a breaker QF2, and a breaker QF3; the speed of fusing the fuse is faster 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, and the fuse and the circuit breaker have advantages and disadvantages, and the advantages of the fuse and the circuit breaker can be combined by arranging the fuse and the circuit breaker at the same time, so that the safety of the charging device 100 is ensured, and meanwhile, the convenience of maintenance is improved;
one end of the fuse FU1 is connected with the breaker QF1, and the other end of the fuse FU1 is connected with a pin 4 of the total ammeter 12; one end of the fuse FU2 is connected with the breaker QF2, and the other end of the fuse FU2 is connected with a pin 5 of the total ammeter 12; one end of the fuse FU3 is connected with the breaker QF3, and the other end of the fuse FU is connected with a pin 6 of the total ammeter 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 total ammeter 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 KM3; the filtering module 17 includes a capacitor C1, a capacitor C2, and a capacitor C3; the three pole single throw switch set 18 includes a plurality of three pole single throw switches 181;
one end of the contactor KM1 is connected with the pin 4 of the alternating current power supply filter 15, and the other end of the contactor KM is connected with one end of the capacitor C2, one end of the capacitor C3 and the pin 3 of the three-pole single-throw switch 181; one end of the contactor KM2 is connected with the pin 5 of the alternating current power supply filter 15, 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 the pin 2 of the three-pole single-throw switch 181; one end of the contactor KM3 is connected with the pin 6 of the alternating current power supply filter 15, and the other end of the contactor KM is connected with the other end of the capacitor C1, the other end of the capacitor C3 and the pin 1 of the three-pole single-throw switch 181; the control ends of the contactor KM1, the contactor KM2 and the contactor KM3 are connected with the first charging pile controller 11.
The shunt module 19 comprises a plurality of shunt meters 191 and a plurality of drain protection breakers 192;
one end of each sub-ammeter 191 is respectively connected with the three-pole single-throw switch group 18, and the other end is connected with one end of a drain protection breaker 192; the other end of each drain breaker 192 is connected to the first charging gun 30 or the low-power charging pile 2. Each of the sub-electricity meters 191 is connected to the first charging pile controller 11.
The shunt module 18 includes a number of drain protection breakers 192;
one end of each drain protection breaker 192 is connected to the triple-pole single-throw switch set 18, and the other end is connected to the first charging gun 30 or the low-power charging pile 2. I.e. the extended low-power charging piles 2 need to be connected to the power supply, only the idle drain breaker 192 need be connected, and the conventional separate wire-drawing connection of the power grid for each charging pile is not needed.
The preferred embodiment of the power allocation method of the charging device of the expandable low-power charging pile comprises the following steps:
step S10, a first charging pile controller or a server acquires total incoming line power P of a total ammeter all Limiting power P of power grid all definition A first power parameter set of the high-power direct-current charging pile and a second power parameter set of each low-power charging pile; limiting power P of an electric network all definition The method comprises the steps that a first charging pile controller is obtained from a server through a first communication module; the second power parameter set is obtained from the low-power charging pile by the first charging pile controller through the first communication module and the second communication module;
step S20, the first charging pile controller or the server is based on the total incoming line power P all Defining a power P all definition Calculating chargeable maximum power P max ；
Step S30, the first charging pile controller or the server based on the first power parameter set, the second power parameter set and the chargeable maximum power P max Setting the output of each first charging gun and second charging gun by a first-come-first charging power distribution method or a proportional charging power distribution methodThe power is defined.
In the implementation, the limited power output by the first charging gun and the second charging gun can be dynamically set based on the electric charges with different peak-to-valley time periods.
In the step S10, the first power parameter set includes a required power P of the electric vehicle connected to the first charging gun r direct current Minimum charging power P of first charging gun m DC ；
The second power parameter set comprises the required power P of the electric automobile connected to the second charging gun r is small Minimum charging power P of second charging gun m 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 rechargeable maximum power P max The calculation formula of (2) is as follows:
P max ＝min(P all ，P all definition ) Safety factor; ensuring chargeable maximum power P max Always in a safe power range;
wherein, the value range of the safety coefficient is (0, 1), and is preferably 0.95.
In the step S30, the setting the limited power output by each of the first charging gun and the second charging gun by the first-to-first charging power distribution method specifically includes:
step S311, when an 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 required total power P in real time rall ：
P rall ＝P r direct current +∑P r is small ；
Step S312, the first charging pile controller or the server determines the total power P rall Whether or not to be less than or equal to the chargeable maximum power P max If so, let the limit power P of the first charging gun I DC ＝P r direct current Limited power P of the second charging gun I is small ＝P r is small ；
If not, the last electric automobile is connected with the first charging gun or the first charging gunThe limiting power of the second charging gun is reduced until P is met rall Less than or equal to P max 。
In the step S30, the setting the limiting 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 an electric automobile is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest required total power P in real time rall ：
P rall ＝P r direct current +∑P r is small ；
Step S322, the first charging pile controller or the server determines the total power P rall Whether or not to be less than or equal to the chargeable maximum power P max If so, let the limit power P of the first charging gun I DC ＝P r direct current Limited power P of the second charging gun I is small ＝P r is small The method comprises the steps of carrying out a first treatment on the surface of the If not, go to step S323;
step S323, limiting the power P of the first charging gun I DC ＝P max /P rall *P r direct current Limited power P of the second charging gun I is small ＝P max /P rall *P r is small Judgment of P I DC Whether or not it is greater than or equal to P m DC ，P I is small Whether or not it is greater than or equal to P m is small If yes, finishing the setting of the limited power; if not, setting the limiting power of the corresponding first charging gun or the corresponding second charging gun to 0, eliminating the corresponding first charging gun or the corresponding second charging gun, and then entering step S321 to perform the recalculation and distribution of the limiting power.
In summary, the invention has the advantages that:
1. through setting up total ammeter in high-power direct current fills electric pile and being connected to the electric wire netting, set up the branching module and be used for shunting the electric energy of total ammeter input, output is for first rifle or low-power fills electric pile that fills, be equivalent to at high-power direct current fills electric pile in integrated block terminal promptly, the low-power of extension fills electric pile and can directly get the electricity through connecting the branching module, need not be like traditional for every fills electric pile and act as go-between alone and connect the electric wire netting, cable cost and cost of labor have been reduced, final very big reduction fills electric pile construction cost, cable power utilization ratio has been promoted.
2. Through setting up fuse group and alternating current 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 the super power operation of electric pile and miniwatt to fill electric pile, and then very big promotion the security of charging device operation.
3. Through setting up alternating current power supply wave filter and filtering module, carry out the wave filtering to three-phase live wire, reduce electromagnetic interference, and then very big promotion charging device's stability of operation.
4. Through setting up the triple single throw switch group including a plurality of triple single throw switch for the branch road module can select to insert three-phase live wire (L1, L2, L3) as required, perhaps only inserts one of them looks live wire, promptly nimble choice insert 220V power or 380V power, very big promotion charging device application flexibility.
5. The limited power output by each first charging gun and each second charging gun is set through a first-come-first-charging power distribution method or a proportional charging power distribution method, so that whether the first-come electric automobile is preferably met or as many electric automobiles as possible are charged at the same time can be selected according to the requirements, and the flexibility of power allocation of the charging device is greatly improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.
Claims (3)
1. A power allocation method of a charging device of an extensible low-power charging pile is characterized by comprising the following steps of: the method comprises the following steps of using a charging device of an expandable low-power charging pile, wherein the charging device 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 total electricity meter, a fuse set, an alternating-current breaker set, an alternating-current power supply filter, a contactor set, a filtering module, a three-pole single-throw switch set, a branching module, a first communication module and at least one first charging gun;
the input end of the fuse set is connected with the output end of the total ammeter, and the output end of the fuse set is connected with the input end of the alternating current breaker set; the input end of the alternating current power supply filter is connected with the output end of the alternating current breaker group, and the output end of the alternating current power supply filter is connected with the input end of the contactor group; the input end of the filtering module is connected with the output end of the contactor group, and the output end of the filtering module is connected with the input end of the three-pole single-throw switch group; the input end of the branching module is connected with the output end of the three-pole single-throw switch group, and the output end of the branching 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 contactor 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;
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 module is respectively connected with the second charging pile controller, the second charging gun and the branching 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;
the fuse set comprises a fuse FU1, a fuse FU2 and a fuse FU3; the alternating current breaker group comprises a breaker QF1, a breaker QF2 and a breaker QF3;
one end of the fuse FU1 is connected with the breaker QF1, and the other end of the fuse FU1 is connected with a pin 4 of the total ammeter; one end of the fuse FU2 is connected with the breaker QF2, and the other end of the fuse FU2 is connected with a pin 5 of the total ammeter; one end of the fuse FU3 is connected with the breaker QF3, and the other end of the fuse FU is connected with a pin 6 of the total ammeter; the circuit breaker QF1, the circuit breaker QF2 and the circuit breaker QF3 are respectively connected with pins 1, 2 and 3 of the alternating current power supply filter;
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;
the contactor group comprises a contactor KM1, a contactor KM2 and a contactor KM3; the filtering 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 the alternating current power supply filter, and the other end of the contactor KM 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 the alternating current power supply filter, and the other end of the contactor 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 the alternating current power supply filter, and the other end of the contactor KM 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;
the branching module comprises a plurality of branch electric meters and a plurality of drain protection circuit breakers;
one end of each sub-ammeter is respectively connected with the three-pole single-throw switch group, and the other end of each sub-ammeter is connected with one end of a leakage protection breaker; the other end of each drain protection circuit breaker is connected with a first charging gun or a low-power charging pile;
the branching module comprises a plurality of drain protection circuit breakers;
one end of each drain protection circuit breaker is connected with the three-pole single-throw switch group respectively, and the other end of each drain protection circuit breaker is connected with the first charging gun or the low-power charging pile;
the method comprises the following steps:
step S10, a first charging pile controller or a server acquires total incoming line power P of a total ammeter all Limited power of the gridP all definition A first power parameter set of the high-power direct-current charging pile and a second power parameter set of each low-power charging pile;
the first power parameter set comprises the required power P of the electric automobile connected to the first charging gun r direct current Minimum charging power P of first charging gun m DC ；
The second power parameter set comprises the required power P of the electric automobile connected to the second charging gun r is small Minimum charging power P of second charging gun m is small ；
Step S20, the first charging pile controller or the server is based on the total incoming line power P all Defining a power P all definition Calculating chargeable maximum power P max ；
The chargeable maximum power P max The calculation formula of (2) is as follows: p (P) max =min（P all ，P all definition ) Safety factor; wherein the value range of the safety coefficient is (0, 1);
step S30, the first charging pile controller or the server based on the first power parameter set, the second power parameter set and the chargeable maximum power P max The limited power output by each first charging gun and each second charging gun is set by a first-come-first charging power distribution method or a proportional charging power distribution method.
2. The power deployment method of a charging device of an expandable low-power charging pile according to claim 1, wherein: in the step S30, the setting the limited power output by each of the first charging gun and the second charging gun by the first-to-first charging power distribution method specifically includes:
step S311, when an 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 required total power P in real time rall ：
P rall =P r direct current +∑P r is small ；
Step S312, the first charging pile controller or the server determines the total power P rall Whether or not to useLess than or equal to the chargeable maximum power P max If so, let the limit power P of the first charging gun I DC =P r direct current Limited power P of the second charging gun I is small =P r is small ；
If not, the limited power of the first charging gun or the second charging gun connected with the last electric automobile is reduced until P is met rall Less than or equal to P max 。
3. The power deployment method of a charging device of an expandable low-power charging pile according to claim 1, wherein: in the step S30, the setting the limiting 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 an electric automobile is connected to the first charging gun or the second charging gun, the first charging pile controller or the server calculates the latest required total power P in real time rall ：
P rall =P r direct current +∑P r is small ；
Step S322, the first charging pile controller or the server determines the total power P rall Whether or not to be less than or equal to the chargeable maximum power P max If so, let the limit power P of the first charging gun I DC =P r direct current Limited power P of the second charging gun I is small =P r is small The method comprises the steps of carrying out a first treatment on the surface of the If not, go to step S323;
step S323, limiting the power P of the first charging gun I DC =P max /P rall *P r direct current Limited power P of the second charging gun I is small =P max /P rall *P r is small Judgment of P I DC Whether or not it is greater than or equal to P m DC ，P I is small Whether or not it is greater than or equal to P m is small ，
If yes, finishing the setting of the limited power; if not, setting the limiting power of the corresponding first charging gun or the corresponding second charging gun to 0, eliminating the corresponding first charging gun or the corresponding second charging gun, and then entering step S321 to perform the recalculation and distribution of the limiting power.
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