CN107672478A - A kind of energy storage type numerical-control direct-current charging pile - Google Patents

A kind of energy storage type numerical-control direct-current charging pile Download PDF

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Publication number
CN107672478A
CN107672478A CN201711079366.2A CN201711079366A CN107672478A CN 107672478 A CN107672478 A CN 107672478A CN 201711079366 A CN201711079366 A CN 201711079366A CN 107672478 A CN107672478 A CN 107672478A
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China
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units
energy
current
charging pile
voltage
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CN201711079366.2A
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Chinese (zh)
Inventor
陈永桥
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Sinopol Electronic Technology Co Ltd
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Sinopol Electronic Technology Co Ltd
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Priority to CN201711079366.2A priority Critical patent/CN107672478A/en
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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
    • 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
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • 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
    • B60L53/20—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 converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters 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
    • B60L53/305—Communication interfaces
    • 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
    • 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
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a kind of energy storage type numerical-control direct-current charging pile, including isolated form full-bridge topology unit, RCD absorptive units, detection and protection location, MCU units, driver element, communication unit and energy-storage units.The present invention uses isolated form full-bridge topology and digital phase shifted control, it is big with rated output power, operating efficiency is high, output voltage range is wide and the characteristic such as continuously adjustabe, constant current can be realized, constant pressure and " three-stage " charge mode of floating charge, provided with COM1, with communication and human-computer interaction function, charging pile and battery energy storage technology are combined simultaneously, make existing distribution system without carrying out too big capacity-increasing transformation, the requirement of more electric automobile rapid large-current charging can be born, electric energy is saved, reduce electric cost expenditure, using flexible, there is good application prospect in DC charging occasion.

Description

A kind of energy storage type numerical-control direct-current charging pile
Technical field
The present invention relates to charging electric vehicle control technology field, more particularly to a kind of energy storage type numerical-control direct-current charging pile.
Background technology
With global industry, the process of urbanization, automobile as the product after the secondary industrial revolution from invent application with During being constantly in sustainable growth.A large amount of discharges of conventional fuel oil vehicle exhaust, consuming excessively for petroleum resources is led The problems such as having caused energy crisis, climate warming and city haze (PM2.5).
Electric automobile is the vehicles for substituting fuel engines with motor using electric power as power source, can not only be real Existing zero-emission, low noise and pollution-free, and can largely save the petroleum-based energy of increasingly depleted.Electric automobile is continuous in recent years The development of stage is achieved in terms of its energy-storage system and dynamical system, its good low-carbon environment-friendly characteristic, meets people Class low-carbon, the green demand of low energy consumption, it is the main direction of future automobile technology development.Therefore it is directed to ev industry elder generation Enter the research and development of technology, with accelerate ev industry the marketization paces, make energy-saving and environmental protection and efficient electric automobile early into For the vehicles of the convenient trip of human comfort, it has also become the trend developed instantly.
With promoting firstly the need of improved and complete charging infrastructure service facility, it is electric automobile energy for the application of electric automobile The guarantee of source supply, the development to electric automobile industry have the function that very important.Electric automobile mainly has conventional friendship at present Current charge, direct current quick charge, wireless charging and the conventional electric energy supply mode of 4 kinds of more preferable battery pack.Direct current charge mode gram Taken electric energy pipeline time it is long the problem of, high power DC fast charge can be realized, to effectively open up long electric automobile stroke, promote Electric automobile is promoted has far reaching significance with development, therefore the research of direct-current charging post technology in recent years enjoys pass always with optimization Note.
The content of the invention
(1) technical problem solved
In order to solve the above problems, the invention provides a kind of energy storage type numerical-control direct-current charging pile, it has rated output The characteristics such as power is big, operating efficiency is high, output voltage continuously adjustabe, " three-stage " charging of constant current, constant pressure and floating charge can be realized Pattern, provided with COM1, there is communication and human-computer interaction function, while charging pile and battery energy storage technology are combined, can To meet the charging requirement of different capabilities on-vehicle battery load.
(2) technical scheme
A kind of energy storage type numerical-control direct-current charging pile, including isolated form full-bridge topology unit, RCD absorptive units, detection and guarantor Protect unit, MCU units, driver element, communication unit and energy-storage units；
DC650V dc sources access the isolated form full-bridge topology unit, after rectified transformation, export 300~500V The D/C voltage of continuously adjustabe, the RCD absorptive units and the detection and protection location are connected respectively；
The RCD absorptive units suppress concussion peak voltage caused by the isolated form full-bridge topology unit, export to car Cell load charging is carried, while exports the connection detection and protection location；
The detection carries out detection and under-voltage guarantor to the input voltage of the isolated form full-bridge topology unit with protection location Shield, to the on-vehicle battery load input voltage and electric current sample respectively and provide overvoltage and overcurrent protection, it is described detection with The output signal of protection location is sent into the MCU units；
The MCU units carry out A/D conversions to the detection and the output signal of protection location, and the drive is produced after processing The pwm control signal of moving cell, the MCU units output connect the driver element and the communication unit respectively；
The driver element is connected with the isolated form full-bridge topology unit, and output drive signal gives the isolated form full-bridge The device for power switching of topology unit；
The MCU units are connected by the communication unit with vehicle-mounted RS485 bus communications, and identify the on-vehicle battery The characteristic of load；
The energy-storage units input DC650V carries out electricity storage, and output is connected with on-vehicle battery load, can be to institute State on-vehicle battery load charging.
Further, the isolated form full-bridge topology unit includes high frequency inverter circuit, high frequency transformer circuit and complete Bridge rectification circuit；The high frequency inverter circuit includes the first~the 4th power switch pipe；The high frequency transformer circuit includes High frequency transformer, the first electric capacity and the first inductance；The full bridge rectifier include the first~the 4th diode, the second electric capacity and Second inductance.
Further, the RCD absorptive units include the 5th diode, the 3rd inductance, first resistor, the third and fourth electricity Hold.
Further, the detection and protection location include voltage sample and overvoltage crowbar, current detection circuit and Multichannel inputs OR gate virtual protection circuit；The voltage sample and overvoltage crowbar include the first and second operational amplifiers, 5th electric capacity and the second~the 4th resistance, wherein first and second operational amplifier selects OP07Z；The current detecting electricity Road includes the electric capacity of current sensor, the 6th and the 7th, wherein the current sensor selects the Hall current sensor with isolation ACS712ELCRT-30A-T；The multichannel input OR gate virtual protection circuit includes triode, the 5th~the 7th resistance, the 8th With the 9th electric capacity.
Further, the MCU units select single-chip microcomputer DSPIC33FJ32GS606.
Further, the driver element selects binary channels high-voltage high-speed voltage-type device for power switching gate drivers 2ED020I12-F。
Further, the communication unit is RS485 interface circuits, including electrical level transferring chip, connector, first and The resistance of two light emitting diodes, the 8th and the 9th, wherein the electrical level transferring chip selects MAX485.
Further, the energy-storage units include the diode of the 5th and the 6th power switch pipe, the 6th and the 7th, the 4th electricity Sense, the tenth electric capacity and energy-storage battery group, wherein the energy-storage battery group is high-capacity lead-acid battery.
(3) beneficial effect
The invention provides a kind of energy storage type numerical-control direct-current charging pile, using isolated form full-bridge topology and digital phase shift control System, have rated output power is big, operating efficiency is high, output voltage range is wide and the characteristic such as continuously adjustabe, constant current, perseverance can be realized Pressure and " three-stage " charge mode of floating charge, provided with COM1, there is communication and human-computer interaction function, at the same by charging pile and Battery energy storage technology is combined, and makes existing distribution system without carrying out too big capacity-increasing transformation, so that it may bear more electronic vapour The requirement of car rapid large-current charging, has saved electric energy, has reduced electric cost expenditure, using flexible, have in DC charging occasion Good application prospect.
Brief description of the drawings
Fig. 1 is a kind of system architecture diagram of energy storage type numerical-control direct-current charging pile involved in the present invention.
Fig. 2 is that a kind of isolated form full-bridge topology element circuit of energy storage type numerical-control direct-current charging pile involved in the present invention is former Reason figure.
Fig. 3 is a kind of RCD absorptive unit circuit theory diagrams of energy storage type numerical-control direct-current charging pile involved in the present invention.
Fig. 4 is the voltage sample and overvoltage crowbar original of a kind of energy storage type numerical-control direct-current charging pile involved in the present invention Reason figure.
Fig. 5 is a kind of current detection circuit schematic diagram of energy storage type numerical-control direct-current charging pile involved in the present invention.
Fig. 6 is that a kind of multichannel of energy storage type numerical-control direct-current charging pile involved in the present invention inputs OR gate virtual protection circuit Schematic diagram.
Fig. 7 is a kind of communication unit circuit theory diagrams of energy storage type numerical-control direct-current charging pile involved in the present invention.
Fig. 8 is a kind of energy-storage units circuit theory diagrams of energy storage type numerical-control direct-current charging pile involved in the present invention.
Embodiment
Embodiment involved in the present invention is described in further details below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of energy storage type numerical-control direct-current charging pile, including isolated form full-bridge topology unit, RCD absorb list Member, detection and protection location, MCU units, driver element, communication unit and energy-storage units；The access isolation of DC650V dc sources Type full-bridge topology unit, after rectified transformation, exports the D/C voltage of 300~500V continuously adjustabes, connect respectively RCD absorb it is single Member and detection and protection location；RCD absorptive units suppress concussion peak voltage caused by isolated form full-bridge topology unit, export to On-vehicle battery load charging, while export connecting detection and protection location；Detection is with protection location to isolated form full-bridge topology list The input voltage of member is detected and under-voltage protection, and the input voltage and electric current of on-vehicle battery load are sampled and provided respectively Pressure and overcurrent protection, detection and the output signal of protection location are sent into MCU units；MCU units are defeated with protection location to detecting Go out signal and carry out A/D conversions, the pwm control signal of driver element is produced after processing, the output of MCU units connects driver element respectively And communication unit；Driver element is connected with isolated form full-bridge topology unit, and output drive signal gives isolated form full-bridge topology unit Device for power switching；MCU units are connected by communication unit with vehicle-mounted RS485 bus communications, and identify that on-vehicle battery loads Characteristic；Energy-storage units input DC650V carries out electricity storage, and output is connected with on-vehicle battery load, and on-vehicle battery is loaded Charging.
DC650V obtains from grid side after single-phase or three phase rectifier and PFC (PFC) processing.
Widely studied for the charge control strategy of battery, complete " three-stage " charging can be born for different batteries The characteristic of load is switched to different charge modes stage by stage：Charge the incipient stage, such as detect cell voltage less than first with reference to electricity Pressure, now for protection battery in charging process it is without damage, should prevent that instantaneous charge current is excessive, from constant-current charge mould Formula, charging current holding is constant in this mode, and voltage slowly rises；Treat that constant-current charge for a period of time, now such as detects electricity Cell voltage has risen to the second reference voltage, and charge mode is transformed into constant-voltage charge by constant current, and charging voltage is kept under the pattern Constant, charging current is gradually reduced；Constant-voltage charge certain time, when such as detecting that charging current has been less than reference current, show Battery has been filled substantially with, and battery is damaged to prevent from overcharging for a long time, is transferred to floating charge pattern until charging finishes, in floating charge mould Charging voltage is only slightly higher than battery rated voltage under formula, and the pattern helps to alleviate the polarity effect in battery charging process. This direct-current charging post is charged using on-vehicle battery load of " three-stage " charging modes to electric automobile.
The power conversion capability of high power converter is directly proportional to the switching tube quantity for participating in power conversion in theory.Direct current Charging pile is generally operational in high-power occasion, therefore uses isolated form full-bridge topology.As shown in Fig. 2 isolated form full-bridge is opened up Flutterring unit includes high frequency inverter circuit, high frequency transformer circuit and full bridge rectifier；High frequency inverter circuit includes power Switching tube VT1~VT4；High frequency transformer circuit includes high frequency transformer T1, electric capacity C1 and inductance L1；Full bridge rectifier includes Diode D1~D4, electric capacity C2 and inductance L2.Input side DC650V by full-bridge inverting 4 power switch pipe VT1~VT4 inversions High frequency transformer T1 is flowed through after into ac square wave, then by 4 diode D1~D4, high frequency transformer T1 secondary side square waves are entered Row full-bridge rectification and output LC filtering, realize that buck DC-DC converts.Electric capacity C1 is capacitance, for preventing high frequency transformation The direct current biasing of the device T1 courses of work and cause magnetic saturation.Inductance L1 is resonant inductance, coordinates high frequency transformer T1 itself leakage inductance To improve the condition that arm is postponed in full-bridge topology and realizes ZVS (no-voltage) Sofe Switch.Switching tube (VT1, VT3 above and below same bridge arm With VT2, VT4) complementary conducting and certain dead time is left, prevent straight-through in handoff procedure bridge arm and short trouble occur； Two switching tubes (VT1, VT4 and VT2, VT3) on same pair of horns stagger certain angle (phase shifting angle) under phase shifting control It is simultaneously open-minded afterwards.High frequency transformer T1 primary sides voltage and the primary side current positive and negative alternating and inclined without direct current in a cycle Put.
In high power D C-DC converters, commutation diode easily produces concussion peak voltage during Reverse recovery, its Peak can reach 2 times of output voltage, if do not suppressed that permanent damage is easily caused to commutation diode, therefore isolate Type full-bridge topology unit output end adds passive RCD peak absorbing circuits.As shown in figure 3, RCD absorptive units include diode D5, inductance L3, resistance R1, electric capacity C3 and C4.The absorbing circuit is simple, without complicated control circuit, and the energy absorbed in circuit Amount part can be exported by resistance R1 to be loaded to on-vehicle battery, is effectively improved conversion efficiency.Work as rectifier bridge output voltage Urect produced during Reverse recovery spike concussion when, diode D5 anode voltages apparently higher than electric capacity C3 both ends voltage and Forward conduction, peak voltage are risen by electric capacity C3 clampers, during this period electric capacity C3 both end voltages；When the concussion of rectifier outlet side disappears Clamp diode D5 reversely ends after mistake, and electric capacity C3 both end voltages are declined by being changed to rising.In whole work process, electric capacity The electric energy that C1 is absorbed forms loop with output end by resistance R1 and discharged, also by energy while resistance R1 consumes portion of energy Amount passes to on-vehicle battery load, is charged to on-vehicle battery load.
It is right, it is necessary to be detected to the input voltage of isolated form full-bridge topology unit and under-voltage protection in charging process The input voltage and electric current of on-vehicle battery load sample and provide overvoltage and overcurrent protection respectively.Detection includes electricity with protection location Pressure sampling and overvoltage crowbar, current detection circuit and multichannel input OR gate virtual protection circuit.As shown in figure 4, voltage is adopted Sample and overvoltage crowbar include operational amplifier U2 and U3, electric capacity C5 and resistance R2~R4, wherein operational amplifier U2 and U3 From OP07Z.The input voltage of isolated form full-bridge topology unit is carried out sampling to obtain Uin, passing ratio integration amplification computing electricity The AD sampling ends that Uin1 is sent into MCU units are exported behind road, at the same Uin1 is further relatively rear more defeated with comparison circuit benchmark Uref Go out logic level Uin2, as the input signal of multichannel input OR gate virtual protection circuit, as Uin1 ＞ Uref, Uin2 is height Level is by trigger protection.As shown in figure 5, current detection circuit includes current sensor U4, wherein electric capacity C6 and C7, current sense Device U4 selects the Hall current sensor ACS712ELCRT-30A-T with isolation.The input current I1 of on-vehicle battery load is from U4 IP1+ and IP2+ pin flow into after through IP1- and IP2- pins flow out electric current I2, the integrated amplifications of output current sampled signal Iout The AD sampling ends to MCU units are exported afterwards, while also serve as the input signal of multichannel input OR gate virtual protection circuit.Such as Fig. 6 Shown, multichannel input OR gate virtual protection circuit includes triode Q1, resistance R5~R7, electric capacity C8 and C9.Multichannel inputs OR gate The input signal of virtual protection circuit be each sample circuit protection signal, the Enable Pin of output end EN connection driver elements, when When to have input signal be high level, triode Q1 conductings, it is low level so as to locking that output end EN will be pulled low by high level VCC The Enable Pin of driver element, play a part of quickly protecting.
MCU units select single-chip microcomputer DSPIC33FJ32GS606, are 16 bit digital signal processors, and operating voltage 3.0~ 3.6V, the high speed PWM passages of wide temperature range -40~+125 DEG C, up to 9 tunnel independence timing, 10 high-speed ADCs and 10 high speeds DAC, 2 High Speed UARTs, 2 SPI, CAN2.0 controllers, 2 I2C etc., peripheral interface are very abundant.Detection and protection location The signal of sampling, handled after ADC sampling ends A/D conversions inside input to single-chip microcomputer, produce corresponding pwm control signal Control driver element.Before driver element carries out power output, single-chip microcomputer is entered by communication unit and vehicle mounted battery management system Row communicates and identifies the characteristic of on-vehicle battery load, then makes corresponding charging strategy, is driven by digital phase shifted control Moving cell works.
Good driver should have the characteristics such as strong antijamming capability and error protection, to the stabilization of power switch pipe work Property and security have vital effect.Driver element selects binary channels high-voltage high-speed voltage-type device for power switching grid Driver 2ED020I12-F.Pwm control signal caused by single-chip microcomputer, which exports, gives driver U1, in the case where driving is enabled, Each power switch pipe work of the amplified driving bridge arm of pwm control signal.2ED020I12-F carries internal logic protection circuit, When the input of same bridge arm two-way drive signal is simultaneously high level by automatic blocking driver U1, to prevent bridge arm direct pass.Drive Dynamic device U1 also carries a general-purpose operation amplifier and a comparator, the overcurrent protection available for bridge arm.In combination with driving The device U1 under-voltage protection functions of itself, there is good security protection feature.
Direct-current charging post first has to identify the characteristic of cell load and for not before starting to on-vehicle battery load charging Corresponding charging strategy is made with cell load.Need to complete by communication unit from different charge modes.Such as Fig. 7 institutes Showing, communication unit is RS485 interface circuits, including electrical level transferring chip U5, connector J1, LED 1 and LED2, Resistance R8 and R9.Single-chip microcomputer and on-vehicle battery load are communicated by RS485 buses, therefore the serial ports input of single-chip microcomputer/defeated Go out to need just be connected in RS485 buses after MAX485 carries out level conversion, sampling rate is controlled by single-chip microcomputer.Direct current fills Electric stake is communicated from RS485, has the characteristics that interface is simple, networking is convenient, long transmission distance.Single-chip microcomputer passes through MAX485 Communicated with vehicle mounted battery management system, the characteristic loaded by communication handshake protocol identification on-vehicle battery.Single-chip microcomputer passes through simultaneously MAX485 can also be with other outside human-computer interaction functions expanded equipment communication, realize close friend.
Intelligent distribution network and the construction of intelligent power distribution residential area at present is not popularized very much also and perfect, existing distribution system appearance Amount can not meet the charging needs of more electric automobile.Increase capacity will be related to investment, multidisciplinary coordination and the construction of complexity The problems such as transformation, and also result in load peak-valley difference and become big, utilization rate is reduced, so as to limit further pushing away for electric automobile Extensively.Thus increase Large Copacity energy-storage units in traditional direct-current charging post, can be realized on the premise of power distribution network is not changed Quick charge to more electric automobile.As shown in figure 8, energy-storage units include power switch pipe VT5 and VT6, diode D6 and D7, inductance L4, electric capacity C10 and energy-storage battery group E1, wherein energy-storage battery group E1 are high-capacity lead-acid battery.Energy-storage units circuit For Buck-Boost translation circuits, input as DC650V.When being charged to energy-storage battery group E1, power switch pipe VT5 and two poles Pipe D7 is turned on, and circuit works in buck chopper pattern；When energy-storage battery group is discharged, i.e., on-vehicle battery load is charged, Power switch pipe VT6 and diode D6 conductings, circuit work in boost chopper pattern., can be real by voltage or current closed-loop Existing energy-storage battery group E1 constant pressure or constant current charge-discharge function, in other words, you can realize by energy-storage battery group E1 to vehicle mounted electric Pond load carries out constant pressure or constant-current charge.The translation circuit is simple in construction, has bidirectional power conveying capacity.
The invention provides a kind of energy storage type numerical-control direct-current charging pile, using isolated form full-bridge topology and digital phase shift control System, have rated output power is big, operating efficiency is high, output voltage range is wide and the characteristic such as continuously adjustabe, constant current, perseverance can be realized Pressure and " three-stage " charge mode of floating charge, provided with COM1, there is communication and human-computer interaction function, at the same by charging pile and Battery energy storage technology is combined, and makes existing distribution system without carrying out too big capacity-increasing transformation, so that it may bear more electronic vapour The requirement of car rapid large-current charging, has saved electric energy, has reduced electric cost expenditure, using flexible, have in DC charging occasion Good application prospect.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the structure of the present invention Think and scope is defined.On the premise of design concept of the present invention is not departed from, technology of the ordinary people in the field to the present invention The all variations and modifications that scheme is made, all should drop into protection scope of the present invention, the claimed technology contents of the present invention, All record in detail in the claims.

Claims (8)

  1. A kind of 1. energy storage type numerical-control direct-current charging pile, it is characterised in that：Including isolated form full-bridge topology unit, RCD absorptive units, Detection and protection location, MCU units, driver element, communication unit and energy-storage units；
    DC650V dc sources access the isolated form full-bridge topology unit, and after rectified transformation, 300~500V of output is continuous Adjustable D/C voltage, the RCD absorptive units and the detection and protection location are connected respectively；
    The RCD absorptive units suppress concussion peak voltage caused by the isolated form full-bridge topology unit, export to vehicle mounted electric Pond load charging, while export the connection detection and protection location；
    The input voltage of the isolated form full-bridge topology unit is detected with protection location for the detection and under-voltage protection, right The input voltage and electric current of the on-vehicle battery load sample and provide overvoltage and overcurrent protection respectively, and the detection and protection are single The output signal of member is sent into the MCU units；
    The MCU units carry out A/D conversions to the detection and the output signal of protection location, and it is single that the driving is produced after processing The pwm control signal of member, the MCU units output connect the driver element and the communication unit respectively；
    The driver element is connected with the isolated form full-bridge topology unit, and output drive signal gives the isolated form full-bridge topology The device for power switching of unit；
    The MCU units are connected by the communication unit with vehicle-mounted RS485 bus communications, and identify the on-vehicle battery load Characteristic；
    The energy-storage units input DC650V carries out electricity storage, and output is connected with on-vehicle battery load, can be to the car Carry cell load charging.
  2. A kind of 2. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The isolated form full-bridge is opened up Flutterring unit includes high frequency inverter circuit, high frequency transformer circuit and full bridge rectifier；The high frequency inverter circuit includes First~the 4th power switch pipe；The high frequency transformer circuit includes high frequency transformer, the first electric capacity and the first inductance；It is described Full bridge rectifier includes the first~the 4th diode, the second electric capacity and the second inductance.
  3. A kind of 3. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The RCD absorptive units Including the 5th diode, the 3rd inductance, first resistor, the third and fourth electric capacity.
  4. A kind of 4. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The detection and protection are single Member includes voltage sample and overvoltage crowbar, current detection circuit and multichannel input OR gate virtual protection circuit；The voltage Sampling and overvoltage crowbar include the first and second operational amplifiers, the 5th electric capacity and the second~the 4th resistance, wherein described First and second operational amplifiers select OP07Z；The current detection circuit includes the electric capacity of current sensor, the 6th and the 7th, Wherein described current sensor selects the Hall current sensor ACS712ELCRT-30A-T with isolation；Multichannel input or Gate logic protection circuit includes triode, the 5th~the 7th resistance, the 8th and the 9th electric capacity.
  5. A kind of 5. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The MCU units are selected Single-chip microcomputer DSPIC33FJ32GS606.
  6. A kind of 6. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The driver element is selected Binary channels high-voltage high-speed voltage-type device for power switching gate drivers 2ED020I12-F.
  7. A kind of 7. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The communication unit is RS485 interface circuits, including electrical level transferring chip, connector, the first and second light emitting diodes, the 8th and the 9th resistance, its Described in electrical level transferring chip select MAX485.
  8. A kind of 8. energy storage type numerical-control direct-current charging pile according to claim 1, it is characterised in that：The energy-storage units include The diode of 5th and the 6th power switch pipe, the 6th and the 7th, the 4th inductance, the tenth electric capacity and energy-storage battery group, wherein described Energy-storage battery group is high-capacity lead-acid battery.
CN201711079366.2A 2017-11-06 2017-11-06 A kind of energy storage type numerical-control direct-current charging pile Withdrawn CN107672478A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109725568A (en) * 2018-12-20 2019-05-07 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） A kind of controller expansion bus device
CN112731027A (en) * 2020-12-23 2021-04-30 中车长春轨道客车股份有限公司 Energy storage formula tram fills electric pile safety protection system
CN114062741A (en) * 2021-10-29 2022-02-18 威胜信息技术股份有限公司 Square wave envelope type micro-topology signal generation system and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109725568A (en) * 2018-12-20 2019-05-07 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） A kind of controller expansion bus device
CN112731027A (en) * 2020-12-23 2021-04-30 中车长春轨道客车股份有限公司 Energy storage formula tram fills electric pile safety protection system
CN112731027B (en) * 2020-12-23 2024-03-08 中车长春轨道客车股份有限公司 Energy storage type tramcar charging pile safety protection system
CN114062741A (en) * 2021-10-29 2022-02-18 威胜信息技术股份有限公司 Square wave envelope type micro-topology signal generation system and method

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