CN116476664A - Charging equipment and charging system - Google Patents

Charging equipment and charging system Download PDF

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Publication number
CN116476664A
CN116476664A CN202310518723.XA CN202310518723A CN116476664A CN 116476664 A CN116476664 A CN 116476664A CN 202310518723 A CN202310518723 A CN 202310518723A CN 116476664 A CN116476664 A CN 116476664A
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CN
China
Prior art keywords
power
charging
unit
units
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310518723.XA
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Chinese (zh)
Inventor
马琳
万新航
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Shenzhen Daotong Hechuang Digital Energy Co ltd
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Shenzhen Daotong Hechuang Digital Energy Co ltd
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Priority to CN202310518723.XA priority Critical patent/CN116476664A/en
Publication of CN116476664A publication Critical patent/CN116476664A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • 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

Abstract

The invention provides a charging device and a charging system, comprising eight power units, eight switch units, four first switch devices and at least one second switch device; the power supply circuit comprises four power units and four switch units, wherein each power unit is provided with a group of power units, the output ends of the four power units are sequentially connected to form a loop, and in the loop, the output ends of every two adjacent power units are communicated or disconnected through one switch unit; four power units in different power unit groups are respectively in one-to-one correspondence, and the output ends of the two corresponding power units are connected through a first switching device; the second switching device is connected between the output ends of two power units which are not corresponding to each other, or the second switching device is connected between the output ends of two power units which are not adjacent to each other. By providing a plurality of power cells and a plurality of switching devices, power distribution flexibility is improved.

Description

Charging equipment and charging system
Technical Field
The embodiment of the invention relates to the technical field of electronic power, in particular to a charging system and charging equipment.
Background
The electric vehicle uses a vehicle-mounted power supply as power, and uses a motor to drive wheels to run, so that the electric vehicle meets various requirements of road traffic and safety regulations. It has less environmental impact than conventional energy vehicles and has been widely used in various types of vehicles in recent years. With the rapid development of current electric vehicles, the need for charging electric vehicles is increasing.
In the prior art, an electric vehicle is generally charged through a charging pile, the power input end of the charging pile is connected with an alternating current power grid, and the power output end of the charging pile outputs electric energy through a charging gun so as to charge the electric vehicle.
However, the current charging pile generally only can output specific charging power requirements, cannot meet various charging power requirements, and cannot flexibly support various charging powers.
Disclosure of Invention
The embodiment of the invention provides charging equipment and a charging system, which improve the flexibility of power distribution so as to support various charging powers.
In a first aspect, a technical solution adopted by an embodiment of the present invention is: provided is a charging device including: eight power cells, eight switching cells, four first switching devices and at least one second switching device; the power unit comprises four power units and four switch units, wherein the four power units and the four switch units are a group of power units, in each power unit group, the output ends of the four power units are sequentially connected to form a loop, and in the loop, the output ends of every two adjacent power units are communicated or disconnected through one switch unit; four power units in different power unit groups are respectively in one-to-one correspondence, and the output ends of the two corresponding power units are connected through one first switching device; the second switching device is connected between the output ends of the two power units which are not mutually corresponding, or the second switching device is connected between the output ends of the two power units which are not mutually adjacent.
In some embodiments, each of the first switching devices, each of the second switching devices, and the switching unit includes a dc contactor.
In some embodiments, each of the first switching devices, each of the second switching devices, and the switching unit includes the dc contactor of a uniform model.
In some embodiments, each of the power cells includes at least one power module.
In some embodiments, each of the power cells includes at least two power modules, each of the power modules in the power cells being connected in parallel.
In some embodiments, the maximum output power of each of the power cells is equal.
In some embodiments, the charging system further comprises at least one charging gun; the charging gun is connected with the output end of one power unit.
In some embodiments, the at least one charging gun comprises four of the charging guns; each charging gun is in one-to-one correspondence with two power units in each power unit group, and is connected with the output end of the corresponding power unit, wherein the power units connected with the charging gun are not corresponding to each other and are not adjacent to each other.
In some embodiments, the at least one charging gun comprises eight of the charging guns; each charging gun corresponds to each power unit one by one, and the charging gun is connected with the output end of the corresponding power unit.
In some embodiments, the charging system further comprises a control unit; the control unit is respectively connected with the first switch devices, the second switch devices and the switch units, and is used for controlling the first switch devices, the second switch devices and the switch units to be turned off or turned on.
In a second aspect, an embodiment of the present invention provides a charging system, which includes a device to be charged and a charging device according to any one of the embodiments of the first aspect, where the device to be charged is connected to the charging device.
Compared with the prior art, the invention has the beneficial effects that: in contrast to the prior art, embodiments of the present invention provide a charging apparatus and a charging system, including eight power units, eight switching units, four first switching devices, and at least one second switching device; the power supply circuit comprises four power units and four switch units, wherein each power unit is provided with a group of power units, the output ends of the four power units are sequentially connected to form a loop, and in the loop, the output ends of every two adjacent power units are communicated or disconnected through one switch unit; four power units in different power unit groups are respectively in one-to-one correspondence, and the output ends of the two corresponding power units are connected through a first switching device; the second switching device is connected between the output ends of two power units which are not corresponding to each other, or the second switching device is connected between the output ends of two power units which are not adjacent to each other. The charging equipment improves the flexibility of power distribution by arranging a plurality of power units and a plurality of switching devices, thereby supporting various charging power outputs.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements/modules and steps, and in which the figures do not include the true to scale unless expressly indicated by the contrary reference numerals.
Fig. 1 is a schematic structural view of a charging apparatus provided in the prior art;
FIG. 2 is a schematic diagram of a logic structure corresponding to FIG. 1;
fig. 3 is a schematic structural diagram of a charging device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a logic structure in a four-output mode corresponding to FIG. 3;
fig. 5 is a schematic diagram of a logic structure in an eight-output mode corresponding to fig. 3.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
In order to facilitate an understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific examples. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
It should be noted that, if not conflicting, the various features of the embodiments of the present invention may be combined with each other, which are all within the protection scope of the present application. In addition, although functional block division is performed in the device schematic, in some cases, block division may be different from that in the device. Moreover, the words "first," "second," and the like as used herein do not limit the data and order of execution, but merely distinguish between identical or similar items that have substantially the same function and effect.
In the high-power charging pile, a power unit stacking mode is adopted to output high power. However, the number of charging interfaces of the current high-power charging pile is small and the power distribution manner is not flexible enough, for example, taking a 360kW direct-current charging pile of ABB company as an example, please refer to fig. 1 and 2, which are composed of four groups of 90kW power units and four charging guns, when the charging gun a needs 270kW charging power, the contactor K01 and the contactor K04 are closed, respectively connecting the power unit 12 and the power unit 14 to the output line of the charging gun a, and adding the power unit 14 which is connected with the charging gun a, wherein all three groups of 90kW power units are used for outputting 270kW of charging gun, but it should be noted that the charging gun B and the charging gun C do not have any output function any more because the power units are occupied. Although the charging pile can flexibly distribute the power units, for example, the maximum power can reach 360kW when the power unit outputs a single gun, the power unit outputs a double gun to meet 180kWx, and the power unit outputs a four gun to meet 90 kWx. However, in this charging pile, four power units respectively correspond to four outputs, and the power is not flexible enough, and can only be switched by 90kW as a minimum unit, and as described above, when other power units are occupied, the corresponding charging pile will not be able to continue to be used. In addition, as the power of the charging pile is continuously increased, the number of output guns is continuously increased, and the four output guns cannot meet the output requirement.
In order to solve the above problems, the present invention provides a charging device and a charging system, where the charging device includes eight power units, and the eight power units form a "three-dimensional" structure, and a switching device is used to establish connection or disconnection between the eight power units, so as to increase an output range of charging power and improve flexibility of power distribution.
In a first aspect, a technical solution adopted by an embodiment of the present invention is: provided is a charging device including: comprising eight power cells (including 1, 2, 3, 4, 5, 6, 7, 8), eight switching cells (including K1, K2, K3, K4, K5, K6, K7, K8), four first switching devices including K11, K12, K13, K14) and at least one second switching device. The power supply circuit comprises four power units and four switch units, wherein each power unit is provided with a group of power units, the output ends of the four power units are sequentially connected to form a loop, and in the loop, the output ends of every two adjacent power units are communicated or disconnected through one switch unit; four power units in different power unit groups are respectively corresponding to each other one by one, and the output ends of the two corresponding power units are connected through a first switching device.
The second switching means is connected between the outputs of two mutually non-corresponding power cells, for example, between the output of the power cell 1 and the output of the power cell 6, between the output of the power cell 1 and the output of the power cell 7, between the output of the power cell 1 and the output of the power cell 8, between the output of the power cell 2 and the output of the power cell 5, between the output of the power cell 2 and the output of the power cell 7, between the output of the power cell 2 and the output of the power cell 8, between the output of the power cell 3 and the output of the power cell 5, between the output of the power cell 3 and the output of the power cell 6, between the output of the power cell 3 and the output of the power cell 8, between the output of the power cell 4 and the output of the power cell 5, between the output of the second switching means and the output of the power cell 4. Alternatively, the second switching means is connected between the output terminals of two power cells that are not adjacent to each other, the second switching means is connected between the output terminal of the power cell 1 and the output terminal of the power cell 3, the output terminal of the power cell 2 and the output terminal of the power cell 4, the second switching means is connected between the output terminal of the power cell 5 and the output terminal of the power cell 7, and the second switching means is connected between the output terminal of the power cell 6 and the output terminal of the power cell 8. The number of the second switch devices can be set according to actual needs, and the mode of setting each second switch device can be any one of the connection modes. It is understood that the number of the second switch devices is at most 16, and each second switch device is connected in a one-to-one correspondence to one of the above connection modes.
The power units (including 1, 2, 3, 4, 5, 6, 7 and 8) are all used for converting alternating current commercial power into direct current so as to charge the equipment to be charged. The specific circuit structures of the power units (including 1, 2, 3, 4, 5, 6, 7 and 8) can be the same, and the charging equipment can be a charging pile and the like.
As shown in fig. 3, the number of the second switching devices is 2. The power unit 1, the power unit 2, the power unit 3, the power unit 4, the switch unit K1, the switch unit K2, the switch unit K3 and the switch unit K4 are a first group of power unit groups, the power unit 5, the power unit 6, the power unit 7, the power unit 8, the switch unit K5, the switch unit K6, the switch unit K7 and the switch unit K8 are a second group of power unit groups, in the first group of power unit groups, the output end of the power unit 1 is connected with the output end of the power unit 2 through the switch unit K1, the output end of the power unit 2 is connected with the output end of the power unit 3 through the switch unit K2, the output end of the power unit 3 is connected with the output end of the power unit 4 through the switch unit K4, in the second group of power unit groups, the output end of the power unit 5 is connected with the output end of the power unit 6 through the switch unit K5, the output end of the power unit 6 is connected with the output end of the power unit 7 through the switch unit K6, the output end of the power unit 7 is connected with the output end of the power unit 8 through the switch unit K7, the output end of the power unit 8 is connected with the output end of the power unit 5 through the switch unit K8, the power unit 1 corresponds to the power unit 5, the power unit 2 corresponds to the power unit 6, the power unit 3 corresponds to the power unit 7, the power unit 4 corresponds to the power unit 8, the output end of the power unit 1 is also connected with the output end of the power unit 5 through the switch device K11, the output end of the power unit 2 is also connected with the output end of the power unit 6 through the switch device K12, the output end of the power unit 3 is also connected with the output end of the power unit 7 through the switch device K13, the output of the power unit 4 is also connected to the output of the power unit 8 via a switching device K14. The second switching means K21 is connected between the output of the first power unit 3 and the output of the second power unit 5, and the second switching means K22 is connected between the output of the first power unit 4 and the output of the second power unit 6.
In the charging apparatus, power may be output through the output terminals of the power units 1, 2, 3, 4, 5, 6, 7, and 8, and the output terminal of one power unit may output different charging powers by establishing or disconnecting a connection between the output terminals of the respective power units through the switch units K1, K2, K3, K4, K5, K6, K7, K8, K11, K12, K13, K14, K21, and K22.
For example, for the output terminal of the power unit 3, if the switching unit K2, the switching unit K3, the first switching device K13, and the second switching device K21 are all turned off, the output power of the output terminal of the power unit 3 is the output power of the power unit 3, and if the switching unit K2, the switching unit K3, the first switching device K13, and the second switching device K21 are all turned on, the output power of the output terminal of the power unit 3 is the sum of the output power of the power unit 3, the output power of the power unit 2, the output power of the power unit 4, the output power of the power unit 7, and the output power of the power unit 5.
Therefore, the charging equipment can improve the power distribution flexibility through the plurality of power units and the plurality of switching devices, so that the charging power output range is improved, and various charging power requirements are met. In addition, by setting at least one second switching device, the call path of the power unit can be optimized, for example, in fig. 3, if the output end of the power unit 3 needs to call the output power of the power unit 5, the second switching device K21 can be directly closed for call, without calling through the switching unit K2, the switching unit K1 and the first switching device K11, so that the current dispatching pressure when the non-adjacent power unit is called is simplified, and the current capacity requirement of the call path is reduced.
In some embodiments, each first switching device (including K11, K12, K13, K14), each second switching device (including K21, K22), and each switching unit (including K1, K2, K3, K4, K5, K6, K7, K8) includes a dc contactor. In the present embodiment, a direct current contactor is used as each switching device, and connection between a plurality of power units can be established or disconnected.
In some embodiments, the first switching devices, the second switching devices, and the switching units include dc contactors of identical types.
Specifically, in fig. 3, each first switching device (including K11, K12, K13, K14), each second switching device (including K21, K22), and each switching unit (including K1, K2, K3, K4, K5, K6, K7, K8) all adopt dc contactors, and the types selected are identical. That is, the main technical parameters such as rated operating voltage and rated operating current of the direct current contactor adopted by each first switching device (comprising K11, K12, K13 and K14), each second switching device (comprising K21 and K22) and the switching unit (comprising K1, K2, K3, K4, K5, K6, K7 and K8) are consistent.
Since in the invention at least one second switching means is provided, the call path of the power unit can be optimized. For example, if there is no scheme of the second switching device K21 between the power unit 3 and the power unit 5, when the output end of the power unit 3 needs to call the output power of the power unit 5, the switching unit K6 and the first switching device K13 need to call, and at this time, each switching device receives a larger current, that is, the requirements on the current capacity of each switching device and each call path are higher, in this application, as in fig. 3, if the output end of the power unit 3 needs to call the output power of the power unit 5, the second switching device K21 may be directly closed to call, and the current capacity of each switching device needs not to be called through the switching unit K5, the switching unit K6 and the first switching device K13, so that the current capacity of each switching device is reduced, that is, the current scheduling pressure when the non-adjacent power unit is called is reduced, the requirements on the current capacity of the call paths are reduced, so that each first switching device, each second switching device and each direct current contactor included in each call path can be consistent, and the requirements on the current capacity of the direct current contactor are reduced.
In some of these embodiments, each power cell (including 1, 2, 3, 4, 5, 6, 7, 8) includes at least one power module. The power module can output power, and the power module can be an ACDC module or a combination of the ACDC module and the DCDC module, wherein the number of the ACDC module and the DCDC module can be set according to actual needs, and the method is not limited herein. The specific circuit structure of the power module may refer to the prior art, and is not limited herein.
In some of these embodiments, each power cell (including 1, 2, 3, 4, 5, 6, 7, 8) includes at least two power modules, each of the power cells (including 1, 2, 3, 4, 5, 6, 7, 8) being connected in parallel.
In some of these embodiments, the maximum output power of each power cell (including 1, 2, 3, 4, 5, 6, 7, 8) is equal. Specifically, the number of power modules included in each power unit (including 1, 2, 3, 4) and each power unit (including 5, 6, 7, 8) may be equal. For example, the maximum output total power of the charging device is 360kW, the maximum output power of each power unit (including 1, 2, 3, 4) and each power unit (including 5, 6, 7, 8) can be 45kW, and each power unit (including 1, 2, 3, 4) and each power unit (including 5, 6, 7, 8) can use 2 power module combinations with maximum output power of 23.5 kW. In practical application, the setting can be performed according to practical needs, and the setting is not limited herein.
In some of these embodiments, the charging device further comprises at least one charging gun; the charging gun is connected with the output end of one power unit. In the charging equipment, the number of charging guns can be flexibly set, and multi-gun output is supported so as to meet different application scenes.
In some of these embodiments, the at least one charging gun comprises four charging guns; each charging gun corresponds to two power units in each power unit group one by one, and the charging guns are connected with the output ends of the corresponding power units, wherein the power units connected with the charging guns are not corresponding to each other and are not adjacent to each other.
Specifically, referring to fig. 3 and 4 in combination, four charging guns are a charging gun A1, a charging gun A2, a charging gun B1 and a charging gun B2, where the charging gun A1 corresponds to the power unit 2, the charging gun A2 corresponds to the power unit 4, the charging gun B1 corresponds to the power unit 5, the charging gun B2 corresponds to the power unit 7, the charging gun A1 is connected to the output end of the power unit 2, the charging gun A2 is connected to the output end of the power unit 4, the charging gun B1 is connected to the output end of the power unit 5, the charging gun B2 is connected to the output end of the power unit 7, the power unit 2 and the power unit 4 are not adjacent in a loop, the power unit 5 and the power unit 7 are not adjacent in a loop, the power unit 2 and the power unit 5 are not corresponding to each other, and the power unit 4 and the power unit 5 are not corresponding to each other.
In this embodiment, assuming that the maximum output power of each power unit (including 1, 2, 3, 4, 5, 6, 7, 8) is 45kW, if the charging power required to be output by the charging gun A2 is less than or equal to 45kW, the switching unit K3, the switching unit K4, the first switching device K14 and the second switching device K22 are all turned off, the charging gun A2 can utilize the power unit 4 to output charging power of 45kW, and the other power units can be invoked by other charging guns or kept in a standby state, so that the utilization rate of the charging unit is improved. If the charging power required to be output by the charging gun A2 is smaller than 180kW, the switch unit K3, the switch unit K4 and the first switch device K14 are all communicated, and the second switch device K22 is disconnected, so that the power unit 4, the power unit 3, the power unit 1 and the power unit 8 together output power through the charging gun A1, and the normal working output of other charging guns is not influenced; if the charging power to be output is smaller than 225kW, the switch unit K3, the switch unit K4, the first switch device K14 and the second switch device K22 are all connected, so that the power unit 4, the power unit 3, the power unit 1, the power unit 8 and the power unit 6 together output power through the first charging gun A1, and the normal working output of other charging guns is not affected at this time.
Therefore, in this embodiment, the output power can be adjusted with a smaller power step, so that the distribution flexibility of the power unit is improved, and the output influence on the rest of charging guns can be reduced in the calling process. In addition, for higher power, the paths when non-adjacent power units are called can be simplified through the second switching device, so that the current dispatching pressure on the calling paths is reduced, and the maximum current capacity only needs to be twice that of a single power module.
In some of these embodiments, the at least one charging gun comprises eight charging guns; each charging gun corresponds to each power unit one by one, and the charging gun is connected with the output end of the corresponding power unit.
Specifically, referring to fig. 3 and 5, eight charging guns are a charging gun A1, a charging gun A2, a charging gun A3, a charging gun A4, a charging gun B1, a charging gun B2, a charging gun B3 and a charging gun B4, where the charging gun A1 corresponds to the power unit 2, the charging gun A2 corresponds to the power unit 4, the charging gun A3 corresponds to the power unit 1, the charging gun A4 corresponds to the power unit 3, the charging gun B1 corresponds to the power unit 5, the charging gun B2 corresponds to the power unit 7, the charging gun B3 corresponds to the power unit 6, the charging gun B4 corresponds to the power unit 8, the charging gun A1 is connected to the output end of the power unit 2, the charging gun A2 is connected to the output end of the power unit 4, the charging gun A3 is connected to the output end of the power unit 3, the charging gun B1 is connected to the output end of the power unit 5, the charging gun B2 is connected to the output end of the power unit 7, and the charging gun B3 is connected to the output end of the power unit 6, and the charging gun B4 is connected to the output end of the power unit 8.
In this embodiment, the charging device can support a mode of 8-gun output, compared with a planar structure provided by ABB, which has only two power selection directions (two dimensions) for power distribution, the mode provided by this embodiment has a three-dimensional characteristic, and one power selection loop is added, that is, three power selection directions (three dimensions) for power distribution, so as to improve flexibility of power distribution.
In some of these embodiments, the charging system further comprises a control unit; the control unit is respectively connected with each first switching device (comprising K11, K12, K13 and K14), each second switching device, each switching unit (comprising K1, K2, K3 and K4) and each switching unit (comprising K5, K6, K7 and K8), and is used for controlling the turn-off or turn-on of each first switching device (comprising K11, K12, K13 and K14), each second switching device, each switching unit (comprising K1, K2, K3 and K4) and each switching unit (comprising K5, K6, K7 and K8). In this embodiment, the on-off of the switching device may be controlled by providing the control unit.
In a second aspect, an embodiment of the present invention provides a charging system, including a device to be charged, and a charging device according to any one of the embodiments of the first aspect; the device to be charged is connected with the charging device. In this embodiment, the charging device has the same structure and function as the charging device according to any one of the first aspect, and will not be described here. The device to be charged may be an electric vehicle, such as an electric vehicle or the like.
It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (11)

1. A charging apparatus, characterized by comprising: eight power cells, eight switching cells, four first switching devices and at least one second switching device;
the power unit comprises four power units and four switch units, wherein the four power units and the four switch units are a group of power units, in each power unit group, the output ends of the four power units are sequentially connected to form a loop, and in the loop, the output ends of every two adjacent power units are communicated or disconnected through one switch unit;
four power units in different power unit groups are respectively in one-to-one correspondence, and the output ends of the two corresponding power units are connected through one first switching device;
the second switching device is connected between the output ends of the two power units which are not mutually corresponding, or the second switching device is connected between the output ends of the two power units which are not mutually adjacent.
2. The charging apparatus according to claim 1, wherein each of the first switching devices, each of the second switching devices, and the switching unit includes a direct current contactor.
3. The charging apparatus according to claim 2, wherein each of the first switching devices, each of the second switching devices, and the switching unit includes the dc contactor of a uniform model.
4. A charging device according to claim 3, wherein each of the power cells comprises at least one power module.
5. The charging device of claim 4, wherein each of the power cells comprises at least two power modules, each of the power modules in the power cells being connected in parallel.
6. The charging apparatus according to any one of claims 1 to 5, wherein maximum output power of each of the power cells is equal.
7. The charging apparatus of any one of claims 1-5, wherein the charging system further comprises at least one charging gun;
the charging gun is connected with the output end of one power unit.
8. The charging apparatus of claim 7, wherein the at least one charging gun comprises four of the charging guns;
each charging gun is in one-to-one correspondence with two power units in each power unit group, and is connected with the output end of the corresponding power unit, wherein the power units connected with the charging gun are not corresponding to each other and are not adjacent to each other.
9. The charging apparatus of claim 7, wherein the at least one charging gun comprises eight of the charging guns;
each charging gun corresponds to each power unit one by one, and the charging gun is connected with the output end of the corresponding power unit.
10. The charging apparatus according to any one of claims 1 to 5, wherein the charging system further comprises a control unit;
the control unit is respectively connected with the first switch devices, the second switch devices and the switch units, and is used for controlling the first switch devices, the second switch devices and the switch units to be turned off or turned on.
11. A charging system comprising a device to be charged, and a charging device as claimed in any one of claims 1 to 10;
the device to be charged is connected with the charging device.
CN202310518723.XA 2023-05-09 2023-05-09 Charging equipment and charging system Pending CN116476664A (en)

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CN202310518723.XA CN116476664A (en) 2023-05-09 2023-05-09 Charging equipment and charging system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310518723.XA CN116476664A (en) 2023-05-09 2023-05-09 Charging equipment and charging system

Publications (1)

Publication Number Publication Date
CN116476664A true CN116476664A (en) 2023-07-25

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