CN115195523A - Charging system and control method thereof - Google Patents

Charging system and control method thereof Download PDF

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Publication number
CN115195523A
CN115195523A CN202210977008.8A CN202210977008A CN115195523A CN 115195523 A CN115195523 A CN 115195523A CN 202210977008 A CN202210977008 A CN 202210977008A CN 115195523 A CN115195523 A CN 115195523A
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China
Prior art keywords
switch
charging
power grid
module
load
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Pending
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CN202210977008.8A
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Chinese (zh)
Inventor
蔡莉
童天辰
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Shitu Technology Hangzhou Co ltd
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Shitu Technology Hangzhou Co ltd
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Priority to CN202210977008.8A priority Critical patent/CN115195523A/en
Publication of CN115195523A publication Critical patent/CN115195523A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/64—Optimising energy costs, e.g. responding to electricity rates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • 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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  • 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 discloses a charging system and a control method thereof. The charging system comprises at least two charging devices and a control device; the charging device comprises a first charging module, a second charging module, a first switch and a second switch; the input end of the first charging module is connected with an alternating current power grid, and the output end of the first charging module is connected with a load through a first switch; the input end of the second charging module is connected with a direct-current power grid, and the output end of the second charging module is connected with a load through a second switch; the control device is used for controlling the first switch to be closed at a first preset time and controlling the first switch to be opened at a second preset time; the control device is connected with the control end of the second switch and used for controlling the second switch to be closed when the output power of the alternating current power grid is smaller than the target power or when the first switch is disconnected. The technical scheme of the embodiment of the invention achieves the effect of meeting the charging requirement of the load, improves the speed of charging the load, reduces the charging time and improves the charging efficiency.

Description

Charging system and control method thereof
Technical Field
The invention relates to the technical field of charging, in particular to a charging system and a control method thereof.
Background
With the wide application of electric vehicles, charging piles are rapidly developed.
At present, an alternating current grid supplies power to a charging pile, and the charging pile converts alternating current and then charges an electric automobile. However, when the ac power grid supplies power to the plurality of charging piles, the power output from the ac power grid to one charging pile is low, and the charging demand of the electric vehicle cannot be satisfied.
Disclosure of Invention
The invention provides a charging system and a control method thereof, and aims to solve the problems that an alternating current power grid is insufficient in providing power for a charging pile, and the charging requirement of an electric automobile cannot be met.
According to an aspect of the present invention, there is provided a charging system including: at least two charging devices and a control device; the charging device comprises a first charging module, a second charging module, a first switch and a second switch;
the input end of the first charging module is connected with an alternating current power grid, and the output end of the first charging module is connected with a load through the first switch;
the input end of the second charging module is connected with a direct-current power grid, and the output end of the second charging module is connected with the load through the second switch;
the control device is connected with the control end of the first switch, and is used for controlling the first switch to be closed at a first preset time and controlling the first switch to be opened at a second preset time so as to control the alternating current power grid to charge the load at the valley power price;
the control device is connected with the control end of the second switch, and the control device is used for controlling the second switch to be closed when the output power of the alternating current power grid is smaller than the target power or when the first switch is switched off so as to control the direct current power grid to charge the load.
Optionally, the charging device further comprises a third switch and an energy storage module;
the alternating current power grid is electrically connected with the input end of the energy storage module through the third switch;
the control device is connected with the control end of the third switch, and the control device is used for controlling the third switch to be closed when the output power of the alternating current power grid is greater than the target power, so that the alternating current power grid charges the energy storage module.
Optionally, the charging device further comprises a fourth switch;
the output end of the energy storage module is electrically connected with the direct current power grid through the fourth switch;
the control device is connected with the control end of the fourth switch, and the control device is used for controlling the fourth switch to be switched on when the output power of the alternating current power grid is smaller than the target power or the first switch is switched off, so that the energy storage module supplies power to the load through the direct current power grid.
Optionally, the charging system further comprises at least one mobile charging device, wherein the mobile charging device comprises a fifth switch and a power battery;
the power battery is electrically connected with the direct current power grid through the fifth switch, the control device is connected with the control end of the fifth switch, and the control device is used for controlling the fifth switch in the idle mobile charging device to be closed so that the idle mobile charging device can supplement power for the charging device in use through the direct current power grid.
Optionally, the first charging module is an ac input charging module; the second charging module is a direct current input charging module.
Optionally, the first charging module is an ac/dc dual-input charging module, and the second charging module is an ac/dc dual-input charging module;
the first charging module is multiplexed into the second charging module.
Optionally, the charging device further comprises a detection module;
the first end of the detection module is electrically connected with the alternating current power grid, the second end of the detection module is connected with the control device, the detection module is used for acquiring parameter information of the alternating current power grid, and the control device is used for determining the output power of the alternating current power grid according to the parameter information.
According to another aspect of the present invention, there is provided a control method of a charging system, the control method of the charging system being used for controlling the charging system according to any one of the embodiments of the present invention; the charging system includes: at least two charging devices and a control device; the charging device comprises a first charging module, a second charging module, a first switch and a second switch; the input end of the first charging module is connected with an alternating current power grid, and the output end of the first charging module is connected with a load through the first switch; the input end of the second charging module is connected with a direct-current power grid, and the output end of the second charging module is connected with the load through the second switch; the control device is connected with the control end of the first switch, and the control device is connected with the control end of the second switch;
the control method comprises the following steps:
controlling the first switch to be closed at a first preset time, and controlling the first switch to be opened at a second preset time so as to control the alternating current power grid to charge the load at the valley price;
and when the output power of the alternating current power grid is smaller than the target power or the first switch is switched off, controlling the second switch to be switched on so as to control the direct current power grid to charge the load.
Optionally, the charging device further comprises a third switch and an energy storage module; the alternating current power grid is electrically connected with the input end of the energy storage module through the third switch; the control device is connected with the control end of the third switch;
the control method further comprises the following steps:
and when the output power of the alternating current power grid is greater than the target power, controlling the third switch to be closed so that the alternating current power grid charges the energy storage module.
Optionally, the charging device further comprises a fifth switch and a power battery; the power battery is electrically connected with the direct current power grid through the fifth switch, and the control device is connected with the control end of the fifth switch;
the control method further comprises the following steps:
and controlling the fifth switch in the idle mobile charging device to be closed so that the idle mobile charging device supplements power for the charging device in use through the direct current power grid.
According to the technical scheme of the embodiment of the invention, by arranging the direct current power grid and the second charging module, when the output power of the alternating current power grid is smaller than the target power required by the load, the control device controls the direct current power grid to charge the load through the second charging module, namely, the alternating current power grid and the direct current power grid charge the load together, so that when the output power of the alternating current power grid is smaller than the target power, the direct current power grid is used for supplementing power, the charging requirement of the load can be met, the speed of charging the load can be increased, the charging time is shortened, and the charging efficiency is improved. The control device controls the alternating current power grid to charge the load at a first preset time, namely the alternating current power grid charges the load at the valley price time; at second preset time, when not in millet price time promptly, control direct current electric wire netting charges for the load, can reduce the cost of charging, promotes user experience. According to the technical scheme of the embodiment of the invention, the problems that the alternating current grid is insufficient in power supply for the charging pile and cannot meet the charging requirement of the electric automobile are solved, the effect of meeting the charging requirement of the load is achieved, the speed of charging the load is increased, the charging time is shortened, and the charging efficiency is improved; and the charging cost is reduced, and the user experience is improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a charging system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another charging system provided in the embodiment of the present invention;
fig. 3 is a schematic structural diagram of another charging system provided in the embodiment of the present invention;
fig. 4 is a flowchart of a control method of a charging system according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method of another charging system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a charging system according to an embodiment of the present invention, and referring to fig. 1, the charging system includes: at least one charging device 100 and a control device 200; the charging device 100 comprises at least one first charging module 101, at least one second charging module 102, at least one first switch 103 and at least one second switch 104; the input end of the first charging module 101 is connected to the ac power grid L1, and the output end of the first charging module 101 is connected to the load 300 through the first switch 103; the input end of the second charging module 102 is connected to the dc power grid L2, and the output end of the second charging module 102 is connected to the load 300 through the second switch 104; the control device 200 is connected to a control end of the first switch 103, and the control device 200 is configured to control the first switch 103 to be turned on at a first preset time and control the first switch 103 to be turned off at a second preset time, so as to control the ac power grid L1 to charge the load 300 at a valley power price; the control device 200 is connected to a control terminal of the second switch 104, and the control device 200 is configured to control the second switch 104 to be closed when the output power of the ac power grid L1 is smaller than the target power or when the first switch 103 is opened, so as to control the dc power grid L2 to charge the load 300.
The charging device 100 is, for example, a charging pile, and the control device 200 is a master control system of the charging pile, and may communicate with the charging pile or communicate with the load 300; the load 300 may be, for example, an electric vehicle, an electric bicycle, or other equipment to be supplied with power.
Specifically, when the load 300 needs to be charged, if the current time is a first preset time, for example, the first preset time is a valley price time, the control device 200 controls the first switch 103 to be closed, and the ac power grid L1 supplies power to the load through the first charging module 101; the control device 200 communicates with the load 300 to obtain the target power required by the load charging, and the control device 200 communicates with the charging device 100 to obtain the output power of the alternating current power grid L1; when the output power of the ac power grid L1 is less than the target power required by the load 300, the control device 200 controls the second switch 104 to be closed, and the dc power grid L2 charges the load 300 through the second charging module 102, that is, the ac power grid L1 and the dc power grid L2 charge the load 300 together, so that when the output power of the ac power grid L1 is less than the target power, power compensation is performed through the dc power grid L2, thereby satisfying the charging requirement of the load 300, thereby increasing the charging speed of the load 300, reducing the charging time, and increasing the charging efficiency. Moreover, when the load 300 needs to be charged, if the current time is in the second preset time, that is, the current time is not in the valley price time, the control device 200 controls the first switch 103 to be turned off, controls the second switch 104 to be turned on, and charges the load 300 through the second charging module 102 by the dc power grid L2, so that the charging cost can be reduced, and the user experience can be improved.
It should be noted that the load 300 in fig. 1 may be a different load, and fig. 1 only shows a case where each charging module is individually connected to the load 300, but is not limited thereto.
According to the technical scheme, by arranging the direct-current power grid and the second charging module, when the output power of the alternating-current power grid is smaller than the target power required by the load, the control device controls the direct-current power grid to charge the load through the second charging module, namely, the alternating-current power grid and the direct-current power grid charge the load together, so that when the output power of the alternating-current power grid is smaller than the target power, the power is supplemented through the direct-current power grid, the charging requirement of the load can be met, the charging speed of the load can be increased, the charging time is shortened, and the charging efficiency is improved. The control device controls the alternating current power grid to charge the load at a first preset time, namely the alternating current power grid charges the load at the valley price time; at second preset time, when not in millet price time promptly, control direct current electric wire netting charges for the load, can reduce the cost of charging, promotes user experience. The technical scheme of the embodiment solves the problems that the alternating current power grid cannot provide insufficient power for the charging pile and cannot meet the charging requirement of the electric automobile, achieves the effect of meeting the charging requirement of the load, improves the speed of charging the load, reduces the charging time and improves the charging efficiency; and the charging cost is reduced, and the user experience is improved.
Fig. 2 is a schematic structural diagram of another charging system provided in an embodiment of the present invention, and optionally, referring to fig. 2, the charging device 100 further includes at least one first charging gun 410 and at least one second charging gun 420; the first switch 103 is connected with the load 300 through a first charging gun 410, and the second switch 104 is connected with the load 300 through a second charging gun 420; optionally, referring to fig. 2, the charging device 100 further includes at least one first connection switch 431, at least one second connection switch 432, and at least one third connection switch 433; the adjacent two first switches 103 are connected by a first connecting switch 431, the adjacent two second switches 104 are connected by a second connecting switch 432, and the adjacent first switches 103 and second switches 104 are connected by a third connecting switch 433.
Specifically, when the load 300 is connected to the first charging gun 410, if the current time is within a first preset time, the control device 200 controls the first switch 103 to be closed, the ac power grid L1 outputs a voltage to the first charging module 101, and the first charging module 101 charges the load 300 through the first charging gun 410; when the output power of the alternating current power grid L1 is smaller than the target power, the control device 200 controls the second switch 104 and the third connecting switch 433 to be closed; the dc power grid L2 outputs a voltage to the second charging module 102, and the second charging module 102 outputs a voltage to the first charging gun 410 through the second switch 104 and the third connecting switch 433, so that the ac power grid L1 and the dc power grid L2 are charged together to the load 300 through the first charging gun 410.
When the load 300 is connected with the second charging gun 420, if the current time is within a first preset time, the control device 200 controls the first switch 103 and the third connecting switch 433 to be closed, the alternating current power grid L1 outputs voltage to the first charging module 101, the first charging module 101 outputs voltage to the second charging gun 420 through the first switch 103 and the third connecting switch 433, and the first charging module 101 charges the load 300 through the second charging gun 420; when the output power of the alternating current power grid L1 is smaller than the target power, the control device 200 controls the second switch 1040 to be closed; the dc grid L2 outputs a voltage to the second charging module 102, and the second charging module 102 outputs a voltage to the second charging gun 420 through the second switch 104, so that the ac grid L1 and the dc grid L2 together charge the load 300 through the second charging gun 420.
Illustratively, when a plurality of first charging modules 101 are required to supply power to one charging gun, the control device 200 controls the first connection switch 431 among the plurality of first charging modules 101 to be closed; when a plurality of second charging modules 102 are required to supply power to one charging gun, the control device 200 controls the second connection switches 432 between the plurality of second charging modules 102 to be closed.
Optionally, referring to fig. 2, the charging device 100 further includes a third switch 105 and an energy storage module 106; the alternating current network L1 is electrically connected to the input end of the energy storage module 106 through the third switch 105; the control device 200 is connected to a control terminal of the third switch 105, and the control device 200 is configured to control the third switch 105 to close when the output power of the ac power grid L1 is greater than the target power, so that the ac power grid L1 charges the energy storage module 106.
Specifically, when the output power of the alternating current power grid L1 is greater than the target power, the alternating current power grid L1 is controlled to charge the energy storage module 106, and the energy storage module 106 can store electric energy, so that redundant energy of the alternating current power grid L1 can be stored, and an energy-saving effect is achieved; when the output power of the ac power grid L1 is insufficient or the ac power grid L1 fails, the energy storage module 106 may be controlled to charge the load 300, thereby ensuring that the load 300 is normally charged.
It should be noted that in some other embodiments, the energy storage module 106 may also be charged by other power supply devices.
Optionally, referring to fig. 2, the charging device 100 further includes a fourth switch 107; the output end of the energy storage module 106 is electrically connected to the dc power grid L2 through a fourth switch 107; the control device 200 is connected to the control terminal of the fourth switch 107, and the control device 200 is configured to control the fourth switch 107 to be closed when the output power of the ac power grid L1 is smaller than the target power, or when the first switch 103 is open, so that the energy storage module 106 supplies power to the load 300 through the dc power grid L1.
Specifically, when the output power of the ac power grid L1 is smaller than the target power, the energy storage module 106 is controlled to discharge for the dc power grid L1, so that the energy storage module 106 supplies power to the load 300 through the dc power grid L1, the ac power grid L1 and the dc power grid L2 charge the load 300 together, and when the output power of the ac power grid L1 is smaller than the target power, the power is supplemented through the dc power grid L2, so that the charging speed of the load 300 can be increased, the charging time is reduced, and the charging efficiency is increased. When the first switch 103 is turned off, the energy storage module 106 is controlled to discharge for the dc power grid L1, so that the energy storage module 106 supplies power to the load 300 through the dc power grid L1, and the effects of saving energy and saving cost are achieved.
It should be noted that the electricity of the dc power grid L2 may originate from the power supply station, or may originate from the energy storage module 106, and the control device 200 is connected to the energy storage module 106, and may obtain the electric quantity of the energy storage module 106; when the electric quantity of the energy storage module 106 is greater than or equal to the preset electric quantity, the energy storage module 106 may be controlled to supply power to the load 300 through the dc power grid L1; and when the electric quantity of the energy storage module 106 is smaller than the preset electric quantity, controlling the direct current power grid L2 to get electricity from the power supply station.
Optionally, referring to fig. 2, the charging system further comprises at least one mobile charging device 400 comprising a fifth switch 108 and a power battery 109; the power battery 109 is electrically connected to the dc power grid L2 through the fifth switch 108, the control device 200 is connected to a control terminal of the fifth switch 108, and the control device 200 is configured to control the fifth switch 108 in the idle mobile charging device 400 to close, so that the idle mobile charging device 400 supplements power to the charging device 100 in use through the dc power grid L2.
Specifically, the mobile charging device 400 is, for example, a mobile charging pile, and the mobile charging pile can be moved; the mobile charging pile can supply power to a load and can also supply power to other charging devices 100 in an idle state. When the mobile charging pile is idle and there is a charging device 100 in use, if the control device 200 determines that the output power of the ac power grid L2 of the charging device 100 in use is less than the target power of the load 300, the control device 200 controls the fifth switch 108 in the idle mobile charging device 400 to be closed and controls the idle mobile charging device 400 to move to the vicinity of the charging device 100 in use, the power battery 109 of the idle mobile charging device 400 supplies power to the dc power grid L2, so that the idle mobile charging device 400 supplements power for the charging device 100 in use through the dc power grid L2, thereby meeting the charging requirement of the load 300, and thus increasing the charging speed of the load 300, reducing the charging time and improving the charging efficiency.
Alternatively, referring to fig. 2, the first charging module 101 is an ac input charging module; the second charging module 102 is a dc input charging module.
Specifically, the first charging module 101 is an ac input charging module, and the output of the first charging module 101 may be an ac output or a dc output; the second charging module 102 is a dc input charging module, and may be an ac output or a dc output.
Fig. 3 is a schematic structural diagram of another charging system provided in an embodiment of the present invention, and optionally, referring to fig. 3, the first charging module 101 is an ac-dc dual-input charging module, and the second charging module 102 is an ac-dc dual-input charging module; the first charging module 101 is multiplexed into the second charging module 102.
Specifically, the first charging module 101 and the second charging module 102 are both ac/dc dual-input charging modules, and the output of the ac/dc dual-input charging module may be ac output or dc output. When the first charging module 101 and the second charging module 102 are both ac/dc dual-input charging modules, the first charging module 101 is reused as the second charging module 102, so that the number of charging modules can be reduced, and the cost can be reduced.
Optionally, referring to fig. 2 and 3, the charging device 100 further comprises a detection module 110; a first end of the detection module 110 is electrically connected to the ac power grid L1, a second end of the detection module 110 is connected to the control device 200, the detection module 110 is configured to obtain parameter information of the ac power grid L1, and the control device 200 is configured to determine output power of the ac power grid L1 according to the parameter information.
Specifically, the parameter information includes, for example, voltage information and current information, the control device 200 may calculate the output power of the ac power grid L1 according to the voltage information and the current information, so that it may be determined whether the output power of the ac power grid L1 satisfies the charging demand of the load 300.
Optionally, referring to fig. 2 and 3, the charging device 100 further includes a sixth switch 120 and a seventh switch 130; the input end of the first charging module 101 is electrically connected to the ac power grid L1 through the sixth switch 120; the input end of the second charging module 102 is electrically connected to the dc power grid L2 through a seventh switch 130; the control device 200 is connected to a control terminal of the sixth switch 120, and the control device 200 is connected to a control terminal of the seventh switch 130.
Specifically, by providing the sixth switch 120 and the seventh switch 130, when the alternating-current power grid L1 is required to charge the load 300, the control device 200 controls the sixth switch 120 to be closed; when it is not necessary to charge the load 300 with the ac power grid L1, the control device 200 controls the sixth switch 120 to be turned off. When the dc power grid L2 is required to charge the load 300, the control device 200 controls the seventh switch 130 to be closed; when the dc power grid L2 is not required to charge the load 300, the control device 200 controls the seventh switch to be turned off.
For example, when the load 300 needs to be charged, if the current time is at a first preset time, for example, a valley price time, the control device 200 controls the first switch 103 and the sixth switch 120 to be closed, and the ac power grid L1 supplies power to the load through the first charging module 101; when the output power of the ac power grid L1 is less than the target power required by the load 300, the control device 200 controls the second switch 104 and the seventh switch 130 to be closed, and the dc power grid L2 charges the load 300 through the second charging module 102, that is, the ac power grid L1 and the dc power grid L2 charge the load 300 together, so that when the output power of the ac power grid L1 is less than the target power, the power is supplemented through the dc power grid L2, thereby satisfying the charging requirement of the load 300, and thus increasing the charging speed of the load 300, reducing the charging time, and increasing the charging efficiency. When the load 300 needs to be charged, if the current time is in the second preset time, that is, the current time is not in the valley price time, the control device 200 controls the first switch 103 and the sixth switch 120 to be turned off, controls the second switch 104 and the seventh switch 130 to be turned on, and charges the load 300 through the second charging module 102 by the dc power grid L2, so that the charging cost can be reduced, and the user experience can be improved.
Referring to fig. 2 and 3, the connection between the control device 200 and each switch indicates that the control device 200 can control each switch, and does not indicate that the control device 200 connects a plurality of switches by one line.
Fig. 4 is a flowchart of a control method of a charging system according to an embodiment of the present invention, where the control method of the charging system is used to control the charging system according to any embodiment of the present invention; referring to fig. 1 and 4, a control method of a charging system includes:
s401, controlling the first switch to be closed at a first preset time, and controlling the first switch to be opened at a second preset time so as to control the alternating current power grid to charge the load at the valley price.
Specifically, when the load 300 needs to be charged, if the current time is a first preset time, for example, the first preset time is valley price time, the control device 200 controls the first switch 103 to be closed, and the ac power grid L1 supplies power to the load through the first charging module 101; when the load 300 needs to be charged, if the current time is in the second preset time, that is, the current time is not in the valley power rate time, the control device 200 controls the first switch 103 to be turned off, so that the ac power grid L1 charges the load 300 at the valley power rate, the charging cost can be reduced, and the user experience is improved.
And S402, controlling the second switch to be closed when the output power of the alternating current power grid is smaller than the target power or the first switch is switched off so as to control the direct current power grid to charge the load.
Specifically, the control device 200 communicates with the load 300 to obtain the target power required for charging the load, and the control device 200 communicates with the charging device 100 to obtain the output power of the ac power grid L1; when the output power of the ac power grid L1 is less than the target power required by the load 300, the control device 200 controls the second switch 104 to be closed, and the dc power grid L2 charges the load 300 through the second charging module 102, that is, the ac power grid L1 and the dc power grid L2 charge the load 300 together, so that when the output power of the ac power grid L1 is less than the target power, power compensation is performed through the dc power grid L2, thereby satisfying the charging requirement of the load 300, thereby increasing the charging speed of the load 300, reducing the charging time, and increasing the charging efficiency. Moreover, when the load 300 needs to be charged, if the current time is in the second preset time, that is, the current time is not in the valley price time, the control device 200 controls the first switch 103 to be turned off, controls the second switch 104 to be turned on, and charges the load 300 through the second charging module 102 by the dc power grid L2, so that the charging cost can be reduced, and the user experience can be improved.
Fig. 5 is a flowchart of a control method of a charging system according to another embodiment of the present invention, and referring to fig. 2 and 5, the control method of the charging system includes:
s501, controlling the first switch to be closed at a first preset time, and controlling the first switch to be opened at a second preset time so as to control the alternating current power grid to charge the load at the valley price.
And S502, when the output power of the alternating current power grid is smaller than the target power or the first switch is disconnected, controlling the second switch to be closed so as to control the direct current power grid to charge the load.
And S503, when the output power of the alternating current power grid is larger than the target power, controlling the third switch to be closed so that the alternating current power grid charges the energy storage module.
Specifically, when the output power of the alternating current power grid L1 is greater than the target power, the alternating current power grid L1 is controlled to charge the energy storage module 106, and the energy storage module 106 can store electric energy, so that redundant energy of the alternating current power grid L1 can be stored, and an energy-saving effect is achieved; when the output power of the ac power grid L1 is insufficient or the ac power grid L1 fails, the energy storage module 106 may be controlled to charge the load 300, thereby ensuring that the load 300 is normally charged.
And S504, when the output power of the alternating current power grid is smaller than the target power, or when the first switch is switched off, controlling the fourth switch to be switched on and switched off so that the energy storage module supplies power to the load through the direct current power grid.
Specifically, when the output power of the ac power grid L1 is smaller than the target power, the energy storage module 106 is controlled to discharge for the dc power grid L1, so that the energy storage module 106 supplies power to the load 300 through the dc power grid L1, the ac power grid L1 and the dc power grid L2 charge the load 300 together, and when the output power of the ac power grid L1 is smaller than the target power, the power is supplemented through the dc power grid L2, so that the charging speed of the load 300 can be increased, the charging time is reduced, and the charging efficiency is increased. When the first switch 103 is turned off, the energy storage module 106 is controlled to discharge for the dc power grid L1, so that the energy storage module 106 supplies power to the load 300 through the dc power grid L1, and the effects of saving energy and saving cost are achieved.
And S505, controlling a fifth switch in the idle mobile charging device to be closed so that the idle mobile charging device supplements power for the charging device in use through the direct current power grid.
Specifically, the mobile charging device 400 is, for example, a mobile charging pile, and the mobile charging pile can move; the mobile charging pile can supply power to a load and can also supply power to other charging devices 100 in an idle state. When the mobile charging pile is idle and there is a charging device 100 in use, if the control device 200 determines that the output power of the ac power grid L2 of the charging device 100 in use is less than the target power of the load 300, the control device 200 controls the fifth switch 108 in the idle mobile charging device 400 to be closed and controls the idle mobile charging device 400 to move to the vicinity of the charging device 100 in use, the power battery 109 of the idle mobile charging device 400 supplies power to the dc power grid L2, so that the idle mobile charging device 400 supplements power for the charging device 100 in use through the dc power grid L2, thereby meeting the charging requirement of the load 300, and thus increasing the charging speed of the load 300, reducing the charging time and improving the charging efficiency.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An electrical charging system, comprising: at least one charging device and a control device; the charging device comprises at least one first charging module, at least one second charging module, at least one first switch and at least one second switch;
the input end of the first charging module is connected with an alternating current power grid, and the output end of the first charging module is connected with a load through the first switch;
the input end of the second charging module is connected with a direct-current power grid, and the output end of the second charging module is connected with the load through the second switch;
the control device is connected with the control end of the first switch, and is used for controlling the first switch to be closed at a first preset time and controlling the first switch to be opened at a second preset time so as to control the alternating current power grid to charge the load at the valley price;
the control device is connected with the control end of the second switch, and the control device is used for controlling the second switch to be closed when the output power of the alternating current power grid is smaller than the target power or when the first switch is disconnected so as to control the direct current power grid to charge the load.
2. The charging system of claim 1, wherein the charging device further comprises a third switch and an energy storage module;
the alternating current power grid is electrically connected with the input end of the energy storage module through the third switch;
the control device is connected with the control end of the third switch, and the control device is used for controlling the third switch to be closed when the output power of the alternating current power grid is greater than the target power, so that the alternating current power grid charges the energy storage module.
3. The charging system of claim 2, wherein the charging device further comprises a fourth switch;
the output end of the energy storage module is electrically connected with the direct current power grid through the fourth switch;
the control device is connected with the control end of the fourth switch, and the control device is used for controlling the fourth switch to be switched on when the output power of the alternating current power grid is smaller than the target power or the first switch is switched off, so that the energy storage module supplies power to the load through the direct current power grid.
4. The charging system of claim 1, further comprising at least one mobile charging device comprising a fifth switch and a power battery;
the power battery is electrically connected with the direct current power grid through the fifth switch, the control device is connected with the control end of the fifth switch, and the control device is used for controlling the fifth switch in the idle mobile charging device to be closed so that the idle mobile charging device can supplement power for the charging device in use through the direct current power grid.
5. The charging system of claim 1, wherein the first charging module is an ac input charging module; the second charging module is a direct current input charging module.
6. The charging system according to claim 1, wherein the first charging module is an ac-dc dual-input charging module, and the second charging module is an ac-dc dual-input charging module;
the first charging module is multiplexed into the second charging module.
7. The charging system of claim 1, wherein the charging device further comprises a detection module;
the first end of the detection module is electrically connected with the alternating current power grid, the second end of the detection module is connected with the control device, the detection module is used for acquiring parameter information of the alternating current power grid, and the control device is used for determining the output power of the alternating current power grid according to the parameter information.
8. A control method of an electric charging system, characterized by controlling the electric charging system according to any one of claims 1 to 7; the charging system includes: at least one charging device and a control device; the charging device comprises at least one first charging module, at least one second charging module, at least one first switch and at least one second switch; the input end of the first charging module is connected with an alternating current power grid, and the output end of the first charging module is connected with a load through the first switch; the input end of the second charging module is connected with a direct-current power grid, and the output end of the second charging module is connected with the load through the second switch; the control device is connected with the control end of the first switch, and the control device is connected with the control end of the second switch;
the control method comprises the following steps:
controlling the first switch to be closed at a first preset time, and controlling the first switch to be opened at a second preset time so as to control the alternating current power grid to charge the load at the valley price;
and when the output power of the alternating current power grid is smaller than the target power or the first switch is switched off, controlling the second switch to be switched on so as to control the direct current power grid to charge the load.
9. The control method of the charging system according to claim 8, wherein the charging device further includes a third switch and an energy storage module; the alternating current power grid is electrically connected with the input end of the energy storage module through the third switch; the control device is connected with the control end of the third switch;
the control method further comprises the following steps:
and when the output power of the alternating current power grid is greater than the target power, controlling the third switch to be closed so that the alternating current power grid charges the energy storage module.
10. The method of claim 8, wherein the charging system further comprises at least one mobile charging device, the mobile charging device comprising a fifth switch and a power battery; the power battery is electrically connected with the direct current power grid through the fifth switch, and the control device is connected with the control end of the fifth switch;
the control method further comprises the following steps:
and controlling the fifth switch in the idle mobile charging device to be closed so that the idle mobile charging device supplements power for the charging device in use through the direct current power grid.
CN202210977008.8A 2022-08-15 2022-08-15 Charging system and control method thereof Pending CN115195523A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117335417A (en) * 2023-11-28 2024-01-02 东莞市奥海科技股份有限公司 Load power supply control method, power supply controller, control assembly and charging pile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117335417A (en) * 2023-11-28 2024-01-02 东莞市奥海科技股份有限公司 Load power supply control method, power supply controller, control assembly and charging pile
CN117335417B (en) * 2023-11-28 2024-03-19 东莞市奥海科技股份有限公司 Load power supply control method, power supply controller, control assembly and charging pile

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