CN111559266B - Charging device for electric automobile - Google Patents

Charging device for electric automobile Download PDF

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Publication number
CN111559266B
CN111559266B CN202010520766.8A CN202010520766A CN111559266B CN 111559266 B CN111559266 B CN 111559266B CN 202010520766 A CN202010520766 A CN 202010520766A CN 111559266 B CN111559266 B CN 111559266B
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China
Prior art keywords
switch
matrix switch
modular multilevel
matrix
multilevel converter
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CN202010520766.8A
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Chinese (zh)
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CN111559266A (en
Inventor
徐坤山
臧凤启
黄家才
曾元静
李本元
盛云龙
赵贤林
史建军
黄亚洲
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Nanjing Institute of Technology
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Nanjing Institute of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses an electric automobile charging device which comprises a hybrid modular multilevel converter, a matrix switch and a plurality of charging piles, wherein the hybrid modular multilevel converter, the matrix switch and the charging piles are sequentially connected, and the input end of the hybrid modular multilevel converter is connected with a power supply. According to the invention, the mixed modular multilevel converter at the front end is adopted, so that the transformer is saved, the voltage adjustment range of the direct current bus is wider, the capacity expansion is facilitated, and the flexibility of a power supply system is improved by adding the matrix switch.

Description

Charging device for electric automobile
Technical Field
The invention belongs to the technical field of terminals, and particularly relates to an electric automobile charging device.
Background
Along with the rapid increase of the number of electric automobiles, the demand of charging piles is increasingly vigorous. The existing high-power charging pile power supply structure mainly has two structures: one is 380V three-phase rectification at the front end, an isolation DCDC converter at the rear end, and then the isolation DCDC converter is used as a module for parallel capacity expansion; one is 10kV input, the voltage is reduced by a transformer, then the voltage is rectified into high-voltage direct current, usually 800V to 1000V, the high-voltage direct current is taken as a bus, and a plurality of DC/DC converters are connected in series at the rear end to charge the electric automobile. The former structure has the problem that when the power supply is high, the input current is too high, the requirement on a cable is too high, and therefore the power supply of the structure is limited. The latter structure can be applied to high-power occasions, but the structure has a large-capacity transformer, so that the efficiency is low, the expansion is not easy, the redundancy is low, and the flexibility is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the electric automobile charging device, which enhances the applicability of an electric automobile power supply system, saves a transformer and has strong expansibility.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electric automobile charging device, fills electric pile including the many level converter of hybrid module ization, matrix switch and a plurality of that connect gradually, the input of the many level converter of hybrid module ization is connected with the power.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, the hybrid modular multilevel converter comprises a plurality of bridge arms, each of which comprises M half-bridge sub-modules and N full-bridge sub-modules, wherein M and N are natural numbers.
Furthermore, the circuit of the charging pile comprises a plurality of isolation DC/DC converters, the input ends of the isolation DC/DC converters are connected in series, and the output ends of the isolation DC/DC converters are connected in parallel.
Furthermore, the matrix switch comprises a plurality of switch units, the switch units are arranged in a matrix form, each switch unit comprises four bidirectional switches which are connected in series to form a loop, and the adjacent switch units share one bidirectional switch.
Furthermore, each corner point in the matrix switch is provided with a connection port, the output end of the connection port is connected with the input end of the charging pile circuit through a switch bus, the input end of the connection port on one side of the matrix switch is connected with the positive pole of the direct-current bus, and the input end of the connection port on the other side of the matrix switch is connected with the negative pole of the direct-current bus through a bidirectional switch.
The invention has the beneficial effects that:
the electric vehicle charging device provided by the invention saves transformers through the front-end hybrid modular multilevel converter, has a wider direct-current bus voltage adjustment range, is beneficial to capacity expansion, and improves the flexibility of a power supply system by adding the matrix switch.
Drawings
Fig. 1 is a schematic structural diagram of an electric vehicle charging device according to the present invention.
Fig. 2 is a schematic diagram of a matrix switch structure according to the present invention.
Detailed Description
The invention will now be described in further detail with reference to the accompanying figures 1-2.
It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the essential changes.
As shown in fig. 1, in one embodiment of the present invention, an electric vehicle charging apparatus includes a hybrid modular multilevel converter, a matrix switch, and a plurality of charging piles, which are connected in sequence, wherein an input terminal of the hybrid modular multilevel converter is connected to a power supply.
The hybrid modular multilevel converter comprises a plurality of bridge arms, wherein each bridge arm comprises M half-bridge sub-modules and N full-bridge sub-modules, and M and N are natural numbers.
In this embodiment, both M and N are greater than 10, which ensures the adjustment range of the dc bus voltage and is beneficial to capacity expansion.
As shown in fig. 1 and fig. 2, in one embodiment of the present invention, the matrix switch includes a plurality of switch units, a plurality of the switch units are arranged in a matrix, each of the switch units includes four bidirectional switches connected in series to form a loop, and one bidirectional switch is shared between adjacent switch units.
Taking the switch unit 1 as an example, the four bidirectional switches are respectively SY11、SY21、SZ11And SZ12Wherein, SY11、SY21、SZ11And SZ12Are connected in series in sequence, and SZ12And one end of (A) and SY11One end of (A)The system has high structural redundancy and strong expansibility, and adopts a two-stage transformation structure, thereby having high efficiency.
Each corner in the matrix switch is provided with a connection port, the output end of the connection port is connected with the input end of the isolation DC/DC converter through a switch bus, wherein the isolation DC/DC converter is connected with the mixed MMC through the matrix switch in a switch bus form, for example, a switch bus i is used, and the line number is Si1To Sij. The input end of the connection port on one side of the matrix switch is connected with the positive pole of the direct current bus, and the input end of the connection port on the other side of the matrix switch is connected with the negative pole of the direct current bus through a bidirectional switch, as shown in fig. 2, namely S11To Si1SY connected to the positive pole of the DC bus1jTo SYijAnd is connected with the negative electrode of the direct current bus.
The circuit of the charging pile comprises a plurality of isolation DC/DC converters, the input ends of the isolation DC/DC converters are connected in series, and the output ends of the isolation DC/DC converters are connected in parallel.
In this embodiment, a switch T is connected in series between each isolated DC/DC converter and the connection portijSwitch TijThe control circuit is used for controlling the on-off of an isolation DC/DC converter connected with the control circuit in series.
In this embodiment, the bidirectional switch in the matrix switch is normally open, and when it is necessary to stop using a certain isolated DC/DC converter, the isolated DC/DC converter can be short-circuited only by closing the bidirectional switch beside the connection port corresponding to the isolated DC/DC converter, for example, when the connection port S needs to be stopped11T can be directly disconnected when corresponding to the isolated DC/DC converteri1The two-way switch SY can also be used11Closing, or switching, the bidirectional switch SZ11And SZ12The effect of stopping the isolated DC/DC converter can be realized by closing the two-way switch, the flexibility of the power supply system is improved, and similarly, when a certain isolated DC/DC converter needs to be used, the corresponding two-way switch is disconnected, or the addition of the matrix switch improves the flexibility and the redundancy of the power supply system, and the addition of the hybrid MMC improves the expansibility of the charging system, so that the system has the advantages of simple structure, low cost and high reliabilityThe application range is wide, and the applicability is greatly improved.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.

Claims (2)

1. The charging device for the electric automobile is characterized by comprising a hybrid modular multilevel converter, a matrix switch and a plurality of charging piles, wherein the hybrid modular multilevel converter, the matrix switch and the charging piles are sequentially connected; the circuit of the charging pile comprises a plurality of isolated DC/DC converters, wherein the input ends of the isolated DC/DC converters are connected in series, and the output ends of the isolated DC/DC converters are connected in parallel; the matrix switch comprises a plurality of switch units which are arranged in a matrix form, each switch unit comprises four bidirectional switches which are connected in series to form a loop, and one bidirectional switch is shared between every two adjacent switch units; each corner point in the matrix switch is provided with a connecting port, the output end of each connecting port is connected with the input end of the circuit of the charging pile through a switch bus, the input end of the connecting port on one side of the matrix switch is connected with the positive pole of the direct-current bus, and the input end of the connecting port on the other side of the matrix switch is connected with the negative pole of the direct-current bus through a bidirectional switch.
2. The electric vehicle charging apparatus of claim 1, wherein the hybrid modular multilevel converter comprises a plurality of bridge arms, each of the bridge arms comprising M half-bridge sub-modules and N full-bridge sub-modules, wherein M and N are natural numbers.
CN202010520766.8A 2020-06-10 2020-06-10 Charging device for electric automobile Active CN111559266B (en)

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Publication number Priority date Publication date Assignee Title
CN112787321B (en) * 2020-12-30 2022-06-10 江苏省电力试验研究院有限公司 Integrated direct-current charging station electrical topology and operation control method thereof

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CN204967648U (en) * 2015-09-18 2016-01-13 山东建筑大学 Many level of modularization transverter of full -bridge and series -parallel connection of half -bridge submodule piece
CN105449684A (en) * 2015-12-24 2016-03-30 合肥工业大学 Large-scale electric vehicle trunking system based on MMC and control method thereof
CN106712238A (en) * 2017-01-16 2017-05-24 南京南瑞继保电气有限公司 Charging method for sub-module-hybrid type converter
CN106740224A (en) * 2017-01-12 2017-05-31 深圳驿普乐氏科技有限公司 A kind of charging system for electric automobile and method
CN108321869A (en) * 2018-01-30 2018-07-24 西安特锐德智能充电科技有限公司 A kind of charging equipment of electric automobile
CN110474356A (en) * 2019-09-15 2019-11-19 长园深瑞继保自动化有限公司 Storage integrated method and system are filled based on multiplexing bidirectional DC/DC converter

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US10245960B2 (en) * 2016-03-17 2019-04-02 Denso International America, Inc. Electric power converter device
CN105958856A (en) * 2016-06-22 2016-09-21 华北电力大学 Novel hybrid MMC topology with capabilities of direct current fault removing and partial automatic voltage sharing
CN109159675B (en) * 2018-09-13 2020-02-21 科华恒盛股份有限公司 Matrix type flexible charging system, charging control method and device

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Publication number Priority date Publication date Assignee Title
WO2012010064A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Mmc-based transformerless four-quadrant high-voltage variable-frequency power supply topology
CN204967648U (en) * 2015-09-18 2016-01-13 山东建筑大学 Many level of modularization transverter of full -bridge and series -parallel connection of half -bridge submodule piece
CN105449684A (en) * 2015-12-24 2016-03-30 合肥工业大学 Large-scale electric vehicle trunking system based on MMC and control method thereof
CN106740224A (en) * 2017-01-12 2017-05-31 深圳驿普乐氏科技有限公司 A kind of charging system for electric automobile and method
CN106712238A (en) * 2017-01-16 2017-05-24 南京南瑞继保电气有限公司 Charging method for sub-module-hybrid type converter
CN108321869A (en) * 2018-01-30 2018-07-24 西安特锐德智能充电科技有限公司 A kind of charging equipment of electric automobile
CN110474356A (en) * 2019-09-15 2019-11-19 长园深瑞继保自动化有限公司 Storage integrated method and system are filled based on multiplexing bidirectional DC/DC converter

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