CN112910023A - Charging pile and control method and device thereof - Google Patents
Charging pile and control method and device thereof Download PDFInfo
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- CN112910023A CN112910023A CN201911222122.4A CN201911222122A CN112910023A CN 112910023 A CN112910023 A CN 112910023A CN 201911222122 A CN201911222122 A CN 201911222122A CN 112910023 A CN112910023 A CN 112910023A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- 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
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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 pile and a control method and a control device thereof, wherein the method comprises the following steps: s1, acquiring actual charging voltage and actual charging current; s2, carrying out jitter elimination processing on the actual charging voltage and the actual charging current, and determining the number of power distribution units for charging; s3, determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current and the determined power distribution units for charging; s4, carrying out jitter elimination processing on the output voltage and the output current of each power distribution unit for charging, and determining the number of power modules for charging in each power distribution unit for charging; and S5, determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging. The invention can improve the charging efficiency and prolong the service life of the power module.
Description
Technical Field
The invention relates to the technical field of charging control, in particular to a charging pile control method, a charging pile control device and a charging pile.
Background
Along with the increasing development of charging pile technology, the output power of the charging pile is larger and larger. At present, high-power charging is mostly realized by connecting more power modules in parallel, however, the degree of intellectualization of the allocation calling strategy of the current power module is not high enough, the situation of poor charging effect or charging failure often occurs, and the service life of the power module is generally short.
Disclosure of Invention
The invention aims to solve the technical problems and provides a charging pile and a control method and device thereof, which can reasonably distribute power modules in the charging pile more intelligently, thereby improving the charging efficiency and prolonging the service life of the power modules.
The technical scheme adopted by the invention is as follows:
a control method of a charging pile including a plurality of power distribution units each connected to a plurality of charging guns through a switching circuit, each of the power distribution units including at least one power module, the control method comprising the steps of: s1, acquiring actual charging voltage and actual charging current; s2, carrying out jitter elimination processing on the actual charging voltage and the actual charging current, and determining the number of power distribution units for charging; s3, determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current and the determined power distribution units for charging; s4, carrying out jitter elimination processing on the output voltage and the output current of each power distribution unit for charging, and determining the number of power modules for charging in each power distribution unit for charging; and S5, determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging.
The step S1 includes: the method comprises the steps of obtaining a required charging voltage and a required charging current requested by a vehicle end, and sending the required charging voltage and the required charging current to a background energy management system, wherein the energy management system combines the required charging voltage, the required charging current, the current load of a station where a charging pile is located, the peak-valley electricity condition and the time-of-use electricity price to obtain upper limit charging power; receiving upper limit charging power issued by the energy management system, and calculating to obtain upper limit charging current according to the upper limit charging power and the required charging voltage; and taking the smaller value of the upper limit charging current and the required charging current as the actual charging current, and taking the required charging voltage as the actual charging voltage.
The step S2 includes: calculating the changed power according to the actual charging voltage, the actual charging current and the total maximum power of a power distribution unit corresponding to the current charging gun; acquiring the number of the changed power distribution units according to the changed power, a preset power upper limit value and a preset power lower limit value; determining the number of required power distribution units according to the number of power distribution units corresponding to the current charging gun and the number of changed power distribution units; and determining the smaller value of the required number of the power distribution units and the available number of the power distribution units in the charging pile as the number of the power distribution units for charging.
The step S3 includes: sequencing the power distribution units for charging; setting the output voltage of each charging power distribution unit as the actual charging voltage; and sequentially distributing the actual charging current to each power distribution unit for charging according to the sequence of the power distribution units for charging, wherein the power distribution unit in the prior distribution sequence reaches the maximum output power of the power distribution unit.
The charging power distribution units are sequentially arranged from small to large according to the service time of the charging power distribution units, and then are sequentially arranged from large to small according to the output currents of the power distribution units which output power in the charging power distribution units.
The step S4 includes: calculating surplus power according to the output voltage and the output current of the power distribution unit for charging and the total maximum power of the power modules in the power distribution unit for charging; acquiring the number of the surplus power modules according to the surplus power; and determining the number of the power modules for charging according to the number of the power modules in the power distribution unit for charging and the number of the surplus power modules.
The step S5 includes: sequencing the power modules for charging; setting the output voltage of each power module for charging as the output voltage of the power distribution unit; and sequentially distributing the output current of the power distribution unit to each power module for charging according to the sequence of the power modules for charging, wherein the power module in the front of the distribution sequence reaches the maximum output power of the power module.
The method comprises the steps of charging power modules, wherein the charging power modules are sequentially sorted from small to large according to the service time of the charging power modules, and then sequentially sorted from large to small according to the output current of the power modules which output power in the charging power modules.
A control device of a charging pile including a plurality of power distribution units each connected to a plurality of charging guns through a switching circuit, each of the power distribution units including at least one power module, the control device comprising: the first acquisition module is used for acquiring actual charging voltage and actual charging current; a first determining module, configured to perform debounce processing on the actual charging voltage and the actual charging current, and determine the number of power distribution units performing charging; the second determining module is used for determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current and the power distribution units for charging determined by the first determining module; a third determining module, configured to perform debounce processing on the output voltage and the output current of each charging power distribution unit, and determine the number of charging power modules in each charging power distribution unit; and the fourth determining module is used for determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the power module for charging determined by the third determining module.
A charging pile comprises the charging pile control device.
The invention has the beneficial effects that:
the invention can more intelligently and reasonably distribute the power modules in the charging pile by acquiring the actual charging voltage and the actual charging current, then carrying out jitter elimination treatment on the actual charging voltage and the actual charging current, determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current as well as the determined power distribution units for charging, then carrying out jitter elimination treatment on the output voltage and the output current of each power distribution unit for charging, determining the number of the power modules for charging in each power distribution unit for charging, and determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging, thereby, the charging efficiency can be improved, and the service life of the power module can be prolonged.
Drawings
Fig. 1 is a schematic diagram of a matrix model in a charging pile according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a hand-in-hand model in a charging pile according to an embodiment of the invention;
fig. 3 is a flowchart of a control method of a charging pile according to an embodiment of the present invention;
fig. 4 is a block diagram of a control device of a charging pile according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The charging pile comprises a plurality of power distribution units, and each power distribution unit is connected to a plurality of charging guns through a switching circuit. In an embodiment of the present invention, the power distribution units, the switching circuits, and the charging guns in the charging pile may be arranged according to a matrix model shown in fig. 1, specifically, each power distribution unit is connected to each charging gun through a corresponding switch (e.g., a relay) (three power distribution units and three charging guns are taken as an example in the figure). In another embodiment of the present invention, the power distribution units, the switching circuit, and the charging guns in the charging pile may be arranged according to a hand-pulling model shown in fig. 2, specifically, every two power distribution units are connected through a switch, and each connection node is connected to a corresponding charging gun through a switch (in the figure, three power distribution units and three charging guns are taken as an example). Each power distribution unit includes at least one power module, which may be a power supply or a power conversion module (e.g., AC/DC), etc., and is capable of providing one power output.
As shown in fig. 3, the control method of the charging pile includes the following steps:
and S1, acquiring the actual charging voltage and the actual charging current.
Specifically, firstly, a required charging voltage V 'and a required charging current I' requested by a vehicle end can be acquired through interaction with the electric vehicle and are sent to the background energy management system, wherein the energy management system can obtain the upper limit charging power Pm by combining the required charging voltage V 'and the required charging current I' and the current load, peak-valley electricity condition and time-of-use electricity price of a station where the charging pile is located.
Then, the upper limit charging power Pm issued by the energy management system may be received, and the upper limit charging current Im is calculated to be Pm/V 'according to the upper limit charging power Pm and the required charging voltage V'.
Finally, the smaller of the upper limit charging current Im and the required charging current I 'may be taken as the actual charging current I, and the required charging voltage V' may be taken as the actual charging voltage V.
S2, the actual charging voltage and the actual charging current are subjected to a debounce process, and the number of power distribution units to be charged is determined.
Specifically, the varied power Pdiff may be calculated according to the actual charging voltage V, the actual charging current I, and the total maximum power of the power distribution unit corresponding to the current charging gun. The calculation formula is as follows:
Pdiff＝V*I–ΣPmax
where Pmax is the maximum output power of a single power distribution unit. In the embodiment of the present invention, the maximum output power of each power distribution unit may be the same, that is, Pdiff-V × I-Nuse × Pmax, where Nuse is the number of power distribution units corresponding to the current charging gun.
And acquiring the number Nchannel of the changed power distribution units according to the changed power Pdiff, the preset power upper limit value Pdiff and the preset power lower limit value Plow. Specifically, if Pdiff is equal to or less than Phigh and equal to or greater than a negative value of Plow, Nchange is 0; if Pdiff is larger than Phigh, Nchannel ═ Pdiff-Phigh)/Pmax ] + 1; if Pdiff is less than the negative value of Plow, then Nchannel [ (| Pdiff | + Plow)/Pmax ]. The preset power upper limit Pdiff and the preset power lower limit Plow are set according to the fact that one more power distribution unit is allocated only when the increased power exceeds an upper limit Phigh (such as 0.1KW), and one more power distribution unit is allocated only when the decreased power is greater than a lower limit Plow (such as 0.1KW), which is also the purpose of data processing in the step.
And then determining the number N of the required power distribution units according to the number Nuse of the power distribution units corresponding to the current charging gun and the number Nchange of the changed power distribution units. Specifically, the number N of required power distribution units is Nuse + Nchange, and N is at least 1 and at most the total number of power distribution units in the entire charging pile.
Finally, the smaller of the required number N of power distribution units and the number of power distribution units available in the charging pile may be determined as the number of power distribution units to be charged. If there are no available power distribution units in the charging pile, that is, all the power distribution units are in working states and the surplus power is not enough to meet the power required currently, it is necessary to forcibly release one power distribution unit from the other charging guns, that is, one charging gun can be distributed to at least one power distribution unit for charging.
By the processing and calculation of step S2, it is necessary to allocate to a group (one or more) of power distribution units to ensure successful charging.
And S3, determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current and the determined power distribution units for charging.
Specifically, the power distribution units that are charging may be sorted first. The power distribution units can be sequentially arranged from small to large according to the service time of the power distribution units for charging, and then sequentially arranged from large to small according to the output current of the power distribution units which output power in the power distribution units for charging. Through the sequencing mode, the service time of the power distribution units can be balanced as much as possible, so that the service life of the power distribution units is prolonged, and the output jitter of the power distribution units which are already outputting can be prevented.
Then, the output voltage of each power distribution unit performing charging may be set as the actual charging voltage V, and the actual charging current I may be sequentially distributed to each power distribution unit performing charging according to the sequence of the power distribution units performing charging, where the power distribution unit in the front of the distribution sequence reaches its maximum output power, the excess charging current is distributed to the power distribution unit in the back of the distribution sequence, and so on.
S4, the jitter elimination process is performed on the output voltage and the output current of each charging power distribution unit, and the number of the power modules to be charged in each charging power distribution unit is determined.
Specifically, the surplus power may be first calculated from the output voltage Vn of the power distribution unit performing charging, the output current In, and the total maximum power of the power modules In the power distribution unit performing charging. It should be understood that the output voltage Vn and the output current In of the power distribution unit described herein are the voltage and current distributed by the present charging. Then, the number of the surplus power modules can be obtained according to the surplus power, and the number of the power modules to be charged is determined according to the number of the power modules in the power distribution unit to be charged and the number of the surplus power modules.
This step determines the number of power modules in a similar manner to the determination of the number of power distribution units in step S2, except that Nchange cannot be a positive number, and the specific calculation manner may refer to step S2.
And S5, determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging.
Specifically, the power modules that are charging may be sorted first. The power modules can be sequentially charged from small to large according to the service time of the power modules, and then sequentially charged from large to small according to the output current of the power modules which output power.
Then, the output voltage of each power module to be charged may be set as the output voltage Vn of the power distribution unit, and the output current In of the power distribution unit is sequentially distributed to each power module to be charged according to the sequence of the power modules to be charged, where the power module In the front of the distribution sequence reaches its maximum output power, the excess charging current is distributed to the power module In the back of the distribution sequence, and so on.
Generally, the step S1 is a first-stage control process, and the first-stage control can obtain the actual charging voltage and current as a subsequent control target; the above steps S2 and S3 are a second-level control process, and the second-level control can distribute the actual charging voltage and current obtained by the first level to the power distribution unit, so as to meet the control target of the first level as much as possible; the above steps S4 and S5 are third-level control processes, and the third-level control can realize the driving control of the end power module, and can satisfy the voltage and current distributed to the power distribution unit by the second level as much as possible.
In the embodiment of the invention, after the number of the power distribution units for charging is determined, the distribution units with the corresponding number can be switched on with the charging gun by controlling the corresponding change-over switches to be closed; after the number of the power modules to be charged, the output voltage and the output current of each power module to be charged are determined, the corresponding power module can be driven by the corresponding driving signal to be charged until the charging is completed.
According to the control method of the charging pile of the embodiment of the invention, the actual charging voltage and the actual charging current are obtained, then the jitter elimination processing is carried out on the actual charging voltage and the actual charging current, the number of the power distribution units for charging is determined, the output voltage and the output current of each power distribution unit for charging are determined according to the actual charging voltage, the actual charging current and the determined power distribution units for charging, then the jitter elimination processing is carried out on the output voltage and the output current of each power distribution unit for charging, the number of the power modules for charging in each power distribution unit for charging is determined, and the output voltage and the output current of each power module for charging are determined according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging, from this, can carry out rational distribution to the power module in filling electric pile more intelligently to can improve charge efficiency, and improve power module's life.
In order to realize the control method of the charging pile of the embodiment, the invention further provides a control device of the charging pile.
As shown in fig. 4, the control apparatus of the charging pile according to the embodiment of the present invention includes a first obtaining module 10, a first determining module 20, a second determining module 30, a third determining module 40, and a fourth determining module 50. The first obtaining module 10 is configured to obtain an actual charging voltage and an actual charging current; the first determining module 20 is configured to perform jitter elimination on the actual charging voltage and the actual charging current, and determine the number of power distribution units performing charging; the second determining module 30 is configured to determine an output voltage and an output current of each power distribution unit performing charging according to the actual charging voltage and the actual charging current and the power distribution units performing charging determined by the first determining module 20; the third determining module 40 is configured to perform debounce processing on the output voltage and the output current of each charging power distribution unit, and determine the number of charging power modules in each charging power distribution unit; the fourth determining module 50 is configured to determine the output voltage and the output current of each charging power module according to the output voltage and the output current of each charging power distribution unit and the charging power module determined by the third determining module 40.
Specifically, the first obtaining module 10 may first obtain a required charging voltage V 'and a required charging current I' requested by a vehicle end through interaction with the electric vehicle, and send the required charging voltage V 'and the required charging current I' to the background energy management system, where the energy management system may obtain the upper limit charging power Pm by combining the required charging voltage V 'and the required charging current I' and the current load, the peak-valley electricity condition, and the time-of-use electricity price of the station where the charging pile is located. Then, the first obtaining module 10 may receive the upper limit charging power Pm issued by the energy management system, and calculate the upper limit charging current Im as Pm/V 'according to the upper limit charging power Pm and the required charging voltage V'. Finally, the first obtaining module 10 may use the smaller of the upper limit charging current Im and the required charging current I 'as the actual charging current I, and use the required charging voltage V' as the actual charging voltage V.
The first determining module 20 may first calculate the varied power Pdiff according to the actual charging voltage V, the actual charging current I, and the total maximum power of the power distribution unit corresponding to the current charging gun. The calculation formula is as follows:
Pdiff＝V*I–ΣPmax
where Pmax is the maximum output power of a single power distribution unit. In the embodiment of the present invention, the maximum output power of each power distribution unit may be the same, that is, Pdiff-V × I-Nuse × Pmax, where Nuse is the number of power distribution units corresponding to the current charging gun.
Furthermore, the first determining module 20 obtains the number Nchange of the changed power allocation units according to the changed power Pdiff, the preset power upper limit value Pdiff and the preset power lower limit value Plow. Specifically, if Pdiff is equal to or less than Phigh and equal to or greater than a negative value of Plow, Nchange is 0; if Pdiff is larger than Phigh, Nchannel ═ Pdiff-Phigh)/Pmax ] + 1; if Pdiff is less than the negative value of Plow, then Nchannel [ (| Pdiff | + Plow)/Pmax ]. The preset power upper limit Pdiff and the preset power lower limit Plow are set according to the fact that one more power distribution unit is allocated only when the increased power exceeds an upper limit Phigh (such as 0.1KW), and one more power distribution unit is allocated only when the decreased power is greater than a lower limit Plow (such as 0.1KW), which is also the purpose of data processing in the step.
The first determining module 20 may then determine the number N of required power distribution units according to the number Nuse of power distribution units corresponding to the current charging gun and the number Nchange of the changed power distribution units. Specifically, the number N of required power distribution units is Nuse + Nchange, and N is at least 1 and at most the total number of power distribution units in the entire charging pile.
Finally, the first determination module 20 may determine the smaller of the number N of required power distribution units and the number of available power distribution units in the charging pile as the number of power distribution units to be charged. If there are no available power distribution units in the charging pile, that is, all the power distribution units are in working states and the surplus power is not enough to meet the power required currently, it is necessary to forcibly release one power distribution unit from the other charging guns, that is, one charging gun can be distributed to at least one power distribution unit for charging.
By the processing and calculation of the first determination module 20, it is of course possible to allocate to a group (one or more) of power distribution units to ensure successful charging.
The second determination module 30 may first order the power distribution units that are charging. The power distribution units can be sequentially arranged from small to large according to the service time of the power distribution units for charging, and then sequentially arranged from large to small according to the output current of the power distribution units which output power in the power distribution units for charging. Through the sequencing mode, the service time of the power distribution units can be balanced as much as possible, so that the service life of the power distribution units is prolonged, and the output jitter of the power distribution units which are already outputting can be prevented.
Then, the second determining module 30 may set the output voltage of each charging power distribution unit as the actual charging voltage V, and sequentially distribute the actual charging current I to each charging power distribution unit according to the sequence of the charging power distribution units, wherein the power distribution unit in the front of the distribution sequence reaches the maximum output power thereof, the excess charging current is distributed to the power distribution unit in the back of the distribution sequence, and so on.
The third determining module 40 may first calculate the surplus power according to the output voltage Vn of the power distribution unit performing charging, the output current In, and the total maximum power of the power modules In the power distribution unit performing charging. It should be understood that the output voltage Vn and the output current In of the power distribution unit described herein are the voltage and current distributed by the present charging. The third determining module 40 may then obtain the number of the surplus power modules according to the surplus power, and determine the number of the power modules to be charged according to the number of the power modules in the power distribution unit to be charged and the number of the surplus power modules.
The third determining module 40 determines the number of power modules in a similar manner to the first determining module 20, except that Nchange cannot be a positive number, and the specific calculation manner can refer to the first determining module 20.
The fourth determination module 50 may first rank the power modules that are charging. The power modules can be sequentially charged from small to large according to the service time of the power modules, and then sequentially charged from large to small according to the output current of the power modules which output power.
Then, the fourth determining module 50 may set the output voltage of each power module to be charged as the output voltage Vn of the power distribution unit, and sequentially distribute the output current In of the power distribution unit to each power module to be charged according to the sequence of the power modules to be charged, where the power module In the previous distribution sequence reaches the maximum output power thereof, the excess charging current is distributed to the power module In the next distribution sequence, and so on.
According to the control device of the charging pile of the embodiment of the invention, the actual charging voltage and the actual charging current are obtained, then the jitter elimination processing is carried out on the actual charging voltage and the actual charging current, the number of the power distribution units for charging is determined, the output voltage and the output current of each power distribution unit for charging are determined according to the actual charging voltage, the actual charging current and the determined power distribution units for charging, then the jitter elimination processing is carried out on the output voltage and the output current of each power distribution unit for charging, the number of the power modules for charging in each power distribution unit for charging is determined, and the output voltage and the output current of each power module for charging are determined according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging, from this, can carry out rational distribution to the power module in filling electric pile more intelligently to can improve charge efficiency, and improve power module's life.
Corresponding to the embodiment, the invention further provides a charging pile.
The charging pile of the embodiment of the present invention includes the control device of the charging pile of any embodiment of the present invention, and specific implementation manners of the charging pile of the embodiment of the present invention may refer to the above embodiments, which are not described herein again.
According to the charging pile disclosed by the embodiment of the invention, the power modules can be reasonably distributed more intelligently, so that the charging efficiency can be improved, and the service life of the power modules can be prolonged.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The meaning of "plurality" is two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A control method of a charging pile, the charging pile including a plurality of power distribution units, each of the power distribution units being connected to a plurality of charging guns through a switching circuit, each of the power distribution units including at least one power module, the control method comprising the steps of:
s1, acquiring actual charging voltage and actual charging current;
s2, carrying out jitter elimination processing on the actual charging voltage and the actual charging current, and determining the number of power distribution units for charging;
s3, determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current and the determined power distribution units for charging;
s4, carrying out jitter elimination processing on the output voltage and the output current of each power distribution unit for charging, and determining the number of power modules for charging in each power distribution unit for charging;
and S5, determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the determined power modules for charging.
2. The method for controlling a charging pile according to claim 1, wherein the step S1 includes:
the method comprises the steps of obtaining a required charging voltage and a required charging current requested by a vehicle end, and sending the required charging voltage and the required charging current to a background energy management system, wherein the energy management system combines the required charging voltage, the required charging current, the current load of a station where a charging pile is located, the peak-valley electricity condition and the time-of-use electricity price to obtain upper limit charging power;
receiving upper limit charging power issued by the energy management system, and calculating to obtain upper limit charging current according to the upper limit charging power and the required charging voltage;
and taking the smaller value of the upper limit charging current and the required charging current as the actual charging current, and taking the required charging voltage as the actual charging voltage.
3. The method for controlling a charging pile according to claim 2, wherein the step S2 includes:
calculating the changed power according to the actual charging voltage, the actual charging current and the total maximum power of a power distribution unit corresponding to the current charging gun;
acquiring the number of the changed power distribution units according to the changed power, a preset power upper limit value and a preset power lower limit value;
determining the number of required power distribution units according to the number of power distribution units corresponding to the current charging gun and the number of changed power distribution units;
and determining the smaller value of the required number of the power distribution units and the available number of the power distribution units in the charging pile as the number of the power distribution units for charging.
4. The method for controlling a charging pile according to claim 3, wherein the step S3 includes:
sequencing the power distribution units for charging;
setting the output voltage of each charging power distribution unit as the actual charging voltage;
and sequentially distributing the actual charging current to each power distribution unit for charging according to the sequence of the power distribution units for charging, wherein the power distribution unit in the prior distribution sequence reaches the maximum output power of the power distribution unit.
5. The charging pile control method according to claim 4, wherein the charging pile control method is characterized in that the charging pile control method is performed according to the sequence of the use time of the charging power distribution units from small to large, and then according to the sequence of the output current of the power distribution unit which outputs power in the charging power distribution units from large to small.
6. The method for controlling a charging pile according to claim 5, wherein the step S4 includes:
calculating surplus power according to the output voltage and the output current of the power distribution unit for charging and the total maximum power of the power modules in the power distribution unit for charging;
acquiring the number of the surplus power modules according to the surplus power;
and determining the number of the power modules for charging according to the number of the power modules in the power distribution unit for charging and the number of the surplus power modules.
7. The method for controlling a charging pile according to claim 6, wherein the step S5 includes:
sequencing the power modules for charging;
setting the output voltage of each power module for charging as the output voltage of the power distribution unit;
and sequentially distributing the output current of the power distribution unit to each power module for charging according to the sequence of the power modules for charging, wherein the power module in the front of the distribution sequence reaches the maximum output power of the power module.
8. The method for controlling the charging pile according to claim 7, wherein the charging pile is sequentially ranked from small to large according to the service time of the power modules for charging, and then sequentially ranked from large to small according to the output current of the power module which outputs power in the power modules for charging.
9. A control apparatus for a charging pile, the charging pile including a plurality of power distribution units, each of the power distribution units being connected to a plurality of charging guns through a switching circuit, each of the power distribution units including at least one power module, the control apparatus comprising:
the first acquisition module is used for acquiring actual charging voltage and actual charging current;
a first determining module, configured to perform debounce processing on the actual charging voltage and the actual charging current, and determine the number of power distribution units performing charging;
the second determining module is used for determining the output voltage and the output current of each power distribution unit for charging according to the actual charging voltage and the actual charging current and the power distribution units for charging determined by the first determining module;
a third determining module, configured to perform debounce processing on the output voltage and the output current of each charging power distribution unit, and determine the number of charging power modules in each charging power distribution unit;
and the fourth determining module is used for determining the output voltage and the output current of each power module for charging according to the output voltage and the output current of each power distribution unit for charging and the power module for charging determined by the third determining module.
10. A charging pile characterized by comprising a control device for a charging pile according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222122.4A CN112910023A (en) | 2019-12-03 | 2019-12-03 | Charging pile and control method and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222122.4A CN112910023A (en) | 2019-12-03 | 2019-12-03 | Charging pile and control method and device thereof |
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| CN112910023A true CN112910023A (en) | 2021-06-04 |
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| CN201911222122.4A Withdrawn CN112910023A (en) | 2019-12-03 | 2019-12-03 | Charging pile and control method and device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306436A (en) * | 2021-06-16 | 2021-08-27 | 江苏云快充新能源科技有限公司 | Charging pile cluster power monitoring method and device based on cloud platform |
| CN114312431A (en) * | 2021-12-27 | 2022-04-12 | 绿能慧充数字技术有限公司 | Charging power intelligent distribution method for charging pile |
| CN114734877A (en) * | 2022-03-23 | 2022-07-12 | 西安领充创享新能源科技有限公司 | Power distribution method and system of vehicle-mounted charger system and terminal equipment |
-
2019
- 2019-12-03 CN CN201911222122.4A patent/CN112910023A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306436A (en) * | 2021-06-16 | 2021-08-27 | 江苏云快充新能源科技有限公司 | Charging pile cluster power monitoring method and device based on cloud platform |
| CN114312431A (en) * | 2021-12-27 | 2022-04-12 | 绿能慧充数字技术有限公司 | Charging power intelligent distribution method for charging pile |
| CN114734877A (en) * | 2022-03-23 | 2022-07-12 | 西安领充创享新能源科技有限公司 | Power distribution method and system of vehicle-mounted charger system and terminal equipment |
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Application publication date: 20210604 |