WO2018218754A1 - High voltage direct current power distribution-based electric vehicle charging station - Google Patents

High voltage direct current power distribution-based electric vehicle charging station Download PDF

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Publication number
WO2018218754A1
WO2018218754A1 PCT/CN2017/093646 CN2017093646W WO2018218754A1 WO 2018218754 A1 WO2018218754 A1 WO 2018218754A1 CN 2017093646 W CN2017093646 W CN 2017093646W WO 2018218754 A1 WO2018218754 A1 WO 2018218754A1
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WO
WIPO (PCT)
Prior art keywords
circuit
power distribution
charging module
high voltage
voltage
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PCT/CN2017/093646
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French (fr)
Chinese (zh)
Inventor
陈刚
霍锦强
梁翔飞
白海涛
何建华
吴志磊
陈航
左锦
王久平
Original Assignee
广东万城万充电动车运营股份有限公司
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Publication of WO2018218754A1 publication Critical patent/WO2018218754A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • 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
    • B60L2210/30—AC 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

Definitions

  • the invention relates to the technical field of charging stations, in particular to an electric vehicle charging station based on high voltage direct current power distribution.
  • high-power electric vehicle charging stations are also more and more, the traditional high-power charging station equipment structure is complex, many components, low efficiency, high energy consumption, repair The rate is high, the construction cost is high, the floor space is large, and the high-power electric vehicle charging station needs to input high power.
  • a high-voltage transformer cabinet must be installed at the input end of the charging station. It is not possible to directly access the three-phase five-wire 380VAC AC.
  • the key component of the traditional high-voltage transformer cabinet is the 50HZ three-phase dry safety isolating transformer, which is bulky and expensive. There is an urgent need to break through a low-cost, high-reliability high-power charging station technology.
  • the main object of the present invention is to provide an electric vehicle charging station based on high voltage direct current power distribution, which breaks through a low cost, high reliability, high power charging station technology.
  • an electric vehicle charging station based on high voltage DC power distribution is characterized in that it comprises a high voltage circuit breaker, a high voltage DC converter and a charger, wherein: the three-phase high voltage input voltage passes through the high voltage circuit breaker. Connected to the high-voltage DC converter, the high-voltage DC converter converts the three-phase high-voltage input AC into a DC power supply to the charger.
  • the high-voltage transformer input AC voltage is 10Kv
  • the output AC voltage range is 0.4Kv ⁇ 4Kv
  • the above-mentioned high-voltage DC converter input voltage range is 0.4Kv ⁇ 4Kv three-phase alternating current, output DC power distribution, and output DC power distribution is used for charging The power supply for the charger inside the station.
  • the high-voltage DC converter comprises a power distribution AC input EMI filter circuit, an electrical frequency rectifier circuit, a power distribution factor correction circuit, a power distribution LLC full-bridge inverter circuit, a power distribution high-frequency transformer, and a high power distribution.
  • Frequency rectification circuit, power distribution anti-backflow DC output circuit, power distribution PWM isolation drive a control circuit and a power distribution controller wherein an input end of the power distribution AC input EMI filter circuit is connected to an output end of the high voltage circuit breaker, and an input end of the electrical frequency rectifier circuit is connected with an output end of the AC input EMI filter circuit,
  • the output end of the electric power frequency rectification circuit is connected with the input end of the power distribution factor correction circuit, and the output end of the power distribution factor correction circuit is connected with the input end of the power distribution LLC full-bridge inverter circuit, and the input of the power distribution high-frequency transformer is connected.
  • the coil is connected with the output end of the power distribution LLC full-bridge inverter circuit, and the output coil of the distribution high-frequency transformer is connected with the input end of the power distribution high-frequency rectifier circuit, and the output end of the power distribution high-frequency rectifier circuit is distributed through the power distribution to prevent backflow DC
  • the output circuit is connected to the input end of the charger, and the power distribution controller is connected to the power distribution factor correction circuit and the power distribution LLC full-bridge inverter circuit through the power distribution PWM isolation drive control circuit, and the output end of the power distribution high-frequency rectifier circuit passes
  • the power distribution PWM isolated drive control circuit is connected to the power distribution controller.
  • the above-mentioned electrical frequency rectification circuit comprises a bridge rectifier circuit composed of diodes D1, D2, D3, D4, D5, D6;
  • the power distribution factor correction circuit comprises a switch tube Q5, capacitors C1, C2, Diode D7, transformer T1, inductor L1, wherein the gate of Q5 is connected to the high voltage DC conversion PWM isolation drive control circuit, the collector of Q5 is connected to the anode of diode D7 and connected to one end of inductor L1, the emitter of Q5 and transformer T1
  • the primary coil is connected, the secondary coil of the transformer T1 is connected to the high-voltage DC-transformed PWM isolation drive control circuit, the primary coil of the transformer T1 is also connected to one end of the capacitors C1 and C2, and the other end of the capacitor C1 is connected to the other end of the inductor L1.
  • the other end of C2 is connected to the cathode of the diode D7;
  • the above-mentioned power distribution LLC full-bridge inverter circuit includes four switch tubes and peripheral circuits thereof, and the switch tubes are Q1, Q2, Q3, and Q4, respectively, and the gate of Q1, Q2
  • the gate of the gate, the gate of Q3, and the gate of Q4 are all connected to the power distribution PWM isolation drive control circuit.
  • the emitter of Q1, the collector of Q2, the emitter of Q3, and the collector of Q4 are all connected to the distribution high frequency transformer.
  • the coil is connected, the collector of Q1 and the collector of Q3 are connected to the cathode of diode D7, the emitter of Q2 and the emitter of Q4 are connected to the primary coil of transformer T1, and the distribution high frequency rectifier circuit includes a diode.
  • Bridge rectifier circuit composed of D9, D10, D11, D12; power distribution anti-backflow DC output circuit includes diode D8, the anode of diode D8 is connected with the output of the bridge rectifier circuit composed of diodes D9, D10, D11, D12
  • the cathode of diode D8 is connected to the input of the charger.
  • the diodes D1, D2, D3, D4, D5, and D6 in the above-mentioned electric power frequency rectifying circuit are power devices; the diode D7 and the switching tube Q5 in the power distribution factor correction circuit are power devices;
  • the I GBT devices Q1, Q2, Q3, and Q4 in the bridge inverter circuit are power devices;
  • the diodes D9, D10, D11, and D12 in the power distribution high-frequency rectifier circuit are power devices;
  • the diode D8 in the output circuit is a power device; the above power device is mounted on the first heat sink; the first heat sink uses an air-cooled and/or liquid-cooled heat sink; the power distribution controller of the high-voltage DC converter and the power distribution PWM isolation
  • the driving circuit is packaged in the first heat conducting housing, and the power distribution controller of the high voltage DC converter and the power distribution PWM isolation driving circuit are disposed separately from the first heat sink.
  • the input voltage of the charger is 0.8Kv to 1Kv DC voltage, including a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K, wherein the input of the DC charging module and the output of the DC breaker The terminal is connected, the output of the DC charging module is connected to the switch K, and the switching of the switch K and the DC breaker is controlled by the off-board DC charger controller.
  • the DC charging module in the charging device comprises a DC input EMI filter circuit, a charging module LLC full bridge inverter circuit, a charging module high frequency transformer, a charging module high frequency rectifying circuit, a charging module anti-backflow DC output circuit, and charging
  • the module PWM isolating the driving control circuit and the charging module controller, wherein the input end of the DC input EMI filter circuit is connected with the output end of the high voltage DC converter, and the input end of the charging module LLC full bridge inverter circuit and the output of the DC input EMI filter circuit
  • the terminal is connected, the output end of the charging module LLC full-bridge inverter circuit is connected with the primary coil of the charging module high-frequency transformer, and the secondary coil of the charging module high-frequency transformer is connected with the input end of the charging module high-frequency rectifier circuit, and the charging module is high-frequency.
  • the output end of the rectifier circuit is connected with the input end of the DC charging anti-backflow DC output circuit, and the output end of the charging module anti-backflow DC output circuit is connected with the charging vehicle, and the charging module controller drives the charging module LLC through the charging module PWM isolation driving control circuit.
  • Switching tube of bridge inverter circuit, charging module high frequency Output voltage limiting circuit, the current through charging module PWM control circuit samples isolated drive to the charging module controller.
  • the charging module LLC full-bridge inverter circuit in the DC charging module includes four switching tubes and peripheral circuits thereof, and the four switching tubes are gates of Q21, Q22, Q23, Q24, Q21, and gates of Q22, respectively.
  • the gate of Q23 and the gate of Q24 are connected to the high voltage DC conversion PWM isolation drive control circuit.
  • the emitter of Q21, the collector of Q22, the emitter of Q23, the collector of Q24 are all connected with high voltage DC conversion high frequency transformer T22.
  • the primary coil is connected, the collector of Q21 and the collector of Q23 are connected to the positive terminal of the aluminum electrolytic capacitor C22, the emitter of Q22 and the emitter of Q24 are connected to the negative terminal of the aluminum electrolytic capacitor C22, and the charging module is high-frequency rectified.
  • the circuit comprises a bridge rectifier circuit composed of diodes D29, D30, D31, D32; the charging module anti-backflow DC output circuit comprises a diode D28, an anode of the diode D28 and a bridge rectifier composed of diodes D29, D30, D31, D32 The output of the circuit is connected at the positive end, and the cathode of the diode D8 is connected to the input of the electric vehicle.
  • the four switching tubes Q21, Q22, Q23, and Q24 of the charging module LLC full-bridge inverter circuit of the above charging device are power devices; the diodes D29, D30, D31, and D32 in the high-frequency rectifying circuit of the charging module are power devices.
  • the diode D28 in the charging module anti-backflow DC output circuit is a power device; the above power device is mounted on the second heat sink; the second heat sink is an air-cooled and/or liquid-cooled heat sink; and the charging module control in the DC charging module
  • the PWM isolation driving circuit of the charging module and the charging module are packaged in the second heat conducting housing, and the charging module controller and the charging module PWM isolation driving circuit in the DC charging module are isolated from the second heat sink.
  • the switching tubes Q21, Q22, Q23, and Q24 in the DC charging module may be IGBT devices or SIC power modules.
  • the invention has the following technical effects:
  • the input voltage range of the high-voltage DC converter of the present invention ranges from 3Kv to 10Kv three-phase AC voltage, the output is DC voltage, and the output DC voltage is used as the power supply voltage of the charger in the charging station, which solves the rectification of the high-voltage input voltage and the input. Power factor correction;
  • the high-voltage direct current high-frequency inverter of the invention inverts high-voltage direct current into high-frequency pulsed alternating current, and then is stepped down to a required voltage by a high-frequency transformer; the transformer uses a high-power density high-frequency transformer, and the transformer is small in size and light in weight. low cost;
  • the high-frequency rectification circuit of the invention adopts bridge rectification composed of a fast rectifier tube; the bridge rectification has the lowest requirements on the transformer, the utilization of the transformer is the highest, and the power expansion is convenient;
  • the high-voltage DC converter of the invention comprises a distribution AC input EMI filter circuit, an electrical frequency rectification circuit, an IGBT power distribution factor correction circuit, an IGBT power distribution LLC full-bridge inverter circuit, and a distribution high-frequency transformer.
  • distribution high-frequency rectifier circuit distribution anti-backflow DC output circuit
  • power distribution PWM isolation drive control circuit power distribution controller, among which power distribution AC input EMI filter circuit, with electrical frequency rectifier circuit, based on IGBT power distribution Factor correction circuit, IGBT power distribution LLC full-bridge inverter circuit, power distribution high-frequency transformer, power distribution high-frequency rectifier circuit, power distribution anti-backflow DC output circuit constitute a power main loop, the power distribution PWM isolation drive control circuit of the present invention
  • the power distribution controller is separated from the power main circuit by high withstand voltage;
  • the key switching element of the present invention uses two or more insulated gate bipolar transistors (IGBTs) in series to solve the problem of high input voltage;
  • the present invention uses DC power distribution, since there is no phase and power angle of the DC power distribution, and there is no stability problem. As long as the voltage drop, network loss and other technical indicators meet the requirements, the transmission can be achieved without regard to the stability problem; as long as the output voltage is consistent, the DC power distribution can be connected in series or in parallel without increasing the processing, and the output power can be expanded; The material cost is lower than the three-phase four-wire AC transmission, and only needs 1/3 or less of the AC transmission.
  • the DC charging module of the charger of the invention changes the traditional three-phase four-wire 380VAC AC power distribution mode, simplifies the electromagnetic compatibility requirements and design of the DC charging module, removes the rectification and power factor correction; the key switching components use IGBT (insulated gate bipolar)
  • the transistor or SIC power module replaces the field effect transistor (MOSFET) used in the traditional DC charging power module, simplifying the structure of the LLC full-bridge resonant circuit; the power density of the DC charging module is greatly increased, the conversion efficiency is higher, and the design of the DC charger is more flexible;
  • the high-power component of the invention is mounted on a high-power component heatsink; the high-power component heatsink is an air-cooled or liquid-cooled heatsink; only the heat sink of the high-power component heat sink is required; the power distribution controller of the high-voltage DC converter is The power distribution PWM isolation driving circuit is packaged in the weak current housing, and the weak current housing is insulated from the high power component heat sink to achieve heat insulation;
  • the weak current control circuit of the invention is packaged in a casing with good heat dissipation, and is insulated from the high-power heating element; the IP protection level of the charger is improved, and the service life in the harsh environment of the system is improved.
  • the invention is an electric vehicle charging station based on high voltage DC power distribution with ingenious design, excellent performance and convenient and practicality.
  • FIG. 1 is a schematic block diagram of an electric vehicle charging station based on high voltage DC power distribution according to the present invention
  • FIG. 2 is a schematic block diagram of a high voltage DC converter according to the present invention.
  • FIG. 3 is a circuit schematic diagram of a high voltage DC converter according to the present invention.
  • FIG. 4 is a schematic block diagram of a charger in the present invention.
  • FIG. 5 is a schematic block diagram of a DC charging module in a charger of the present invention.
  • FIG. 6 is a circuit schematic diagram of a DC charging module in a charger of the present invention.
  • the directional indication is only used to explain in a certain posture (as shown in the drawing)
  • the relative positional relationship between the components, the motion situation, and the like if the specific posture changes, the directional indication also changes accordingly.
  • the present invention provides an electric vehicle charging station based on high voltage DC power distribution, which comprises a high voltage circuit breaker, a high voltage DC converter and a charger, wherein: the three-phase high voltage input voltage passes through the high voltage circuit breaker and the high voltage The DC converter is connected, and the high-voltage DC converter converts the three-phase high-voltage input AC into a DC power supply to the charger.
  • the invention enters the rectifier directly from the high voltage of the power grid through the high voltage circuit breaker, and is fully rectified by the high voltage diode, the power factor is corrected and boosted, and then inverted by the full bridge inverter to easily realize the high frequency variable voltage output. It is then filtered by full-bridge rectification and then sent to the off-board electric vehicle DC charger.
  • the invention directly delivers direct current through the circuit processing and supplies power to the charger.
  • Characteristics of DC transmission 1. There is no phase and power angle of DC transmission. There is no stability problem. As long as the voltage drop, network loss and other technical indicators meet the requirements, the transmission can be achieved without considering the stability problem. 2. As long as the output voltage is consistent.
  • the direct current transmission can be connected in series or in parallel without any treatment, and the output power is expanded. 3. The cost of the direct current transmission material is lower than that of the three-phase five-wire alternating current, and only 1/3 or lower of the alternating current transmission is required.
  • the above-mentioned high-voltage DC converter has an input voltage range of 0.4Kv to 4Kv three-phase alternating current, and outputs DC power distribution, and the output DC power distribution is used as a power supply for the charger in the charging station.
  • the high-voltage DC converter includes a power distribution AC input EMI filter circuit, an electrical frequency rectifier circuit, a power distribution factor correction circuit, a power distribution LLC full-bridge inverter circuit, a power distribution high-frequency transformer, and a high power distribution.
  • Frequency rectification circuit Frequency rectification circuit, power distribution anti-backflow DC output circuit, power distribution PWM isolation drive control circuit, power distribution controller, wherein the input end of the power distribution AC input EMI filter circuit is connected with the output end of the high voltage circuit breaker, and is equipped with electric frequency frequency rectification The input end of the circuit is connected with the output end of the AC input EMI filter circuit, and the output end of the electric frequency rectification circuit is connected with the input end of the power distribution factor correction circuit, and the output end of the power distribution factor correction circuit and the power distribution LLC are all The input end of the bridge inverter circuit is connected, the input coil of the distribution high-frequency transformer is connected with the output end of the power distribution LLC full-bridge inverter circuit, and the output coil of the distribution high-frequency transformer is connected with the input end of the distribution high-frequency rectifier circuit.
  • the output end of the distribution high-frequency rectification circuit is connected to the input end of the charger through the power distribution anti-backflow DC output circuit, and the power distribution controller is driven by the power distribution PWM isolation drive.
  • the control circuit and power factor correction circuit and the power distribution switchboard LLC full bridge inverter circuit connected to the output terminal of the power distribution by the power distribution frequency rectifier circuit isolation PWM drive control circuit is connected with the distribution controller.
  • the power supply factor correction circuit of the high voltage input of the present invention mainly solves the rectification of the high voltage input voltage and the power factor correction of the input;
  • the high voltage DC power distribution LLC full bridge inverter circuit adopts the high voltage frequency conversion inverter.
  • Technology inverting high-voltage DC into high-frequency pulse AC, and then stepping down to a demand voltage through a high-frequency transformer;
  • the transformer uses a high-power density high-frequency transformer, the transformer is small in size, light in weight, low in cost; power distribution anti-backflow DC output
  • the circuit adopts bridge rectifier composed of fast rectifier tube.
  • the bridge rectifier has the lowest requirements on the transformer, the utilization of the transformer is the highest, and the power expansion is convenient.
  • the power distribution PWM isolation drive control circuit includes the controller and its peripheral circuits, and the peripheral circuit includes the communication processing circuit. , control circuit, sampling and its processing circuit.
  • the above-mentioned electrical frequency rectification circuit comprises a bridge rectifier circuit composed of diodes D1, D2, D3, D4, D5, D6;
  • the power distribution factor correction circuit comprises a switch tube Q5, capacitors C1, C2, Diode D7, transformer T1, inductor L1, wherein the gate of Q5 is connected to the high voltage DC conversion PWM isolation drive control circuit, the collector of Q5 is connected to the anode of diode D7 and connected to one end of inductor L1, the emitter of Q5 and transformer T1
  • the primary coil is connected, the secondary coil of the transformer T1 is connected to the high-voltage DC-transformed PWM isolated drive control circuit, and the primary coil of the transformer T1 is also connected to the capacitor One end of C1 and C2 are connected, the other end of the capacitor C1 is connected to the other end of the inductor L1, and the other end of the C2 is connected to the cathode of the diode D7.
  • the above-mentioned power distribution LLC full-bridge inverter circuit includes four switching tubes and peripheral circuits thereof.
  • the switch tubes are Q1, Q2, Q3, and Q4, respectively, wherein the gate of Q1, the gate of Q2, the gate of Q3, and the gate of Q4 are all connected to the power distribution PWM isolation drive control circuit, the emitter of Q1, Q2
  • the collector, the emitter of Q3, and the collector of Q4 are all connected to the primary coil of the distribution high frequency transformer T2, the collector of Q1 and the collector of Q3 are connected to the cathode of diode D7, the emitter of Q2 and the Q4
  • the emitter is connected to the primary coil of the transformer T1
  • the power distribution high-frequency rectifier circuit includes a bridge rectifier circuit composed of diodes D9, D10, D11, and D12;
  • the power distribution anti-backflow DC output circuit includes a diode D8 and a diode D8.
  • the anode is connected to the output of a bridge rectif
  • the diodes D1, D2, D3, D4, D5, and D6 in the above-mentioned electric power frequency rectifying circuit are power devices; the diode D7 and the switching tube Q5 in the power distribution factor correction circuit are power devices;
  • the I GBT devices Q1, Q2, Q3, and Q4 in the bridge inverter circuit are power devices; the diodes D9, D10, D11, and D12 in the power distribution high-frequency rectifier circuit are power devices; the diodes in the power distribution anti-backflow DC output circuit D8 is a power device;
  • the above power device is mounted on the first heat sink; the first heat sink adopts an air-cooled and/or liquid-cooled heat sink; the power distribution controller of the high-voltage DC converter and the power distribution PWM isolation drive circuit are packaged in the first In a heat-conducting housing, the power distribution controller of the high-voltage DC converter and the power distribution PWM isolation drive circuit are disposed separately from the first heat sink.
  • the power distribution controller and the power distribution PWM isolation driving circuit of the high voltage DC conversion device are packaged in the first heat conduction housing, the power distribution controller of the high voltage DC conversion device, and the power distribution PWM isolation driving circuit, and the A heat sink is isolated to achieve thermal isolation of the control circuit from the high-power heating device, and to improve the I P protection level of the charger, in particular, to improve the service life of the system in harsh environments.
  • the input voltage of the charger is 0.8Kv to 1Kv DC voltage, including a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K, wherein the input of the DC charging module and the output of the DC breaker The terminal is connected, the output of the DC charging module is connected to the switch K, and the switching of the switch K and the DC breaker is controlled by the off-board DC charger controller.
  • the present invention controls the voltage of the direct current by setting a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K in the charger to output the required electric vehicle.
  • the charging voltage is set by setting a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K in the charger to output the required electric vehicle.
  • the DC charging module in the above charging machine comprises a DC input EMI filter circuit, a charging module LLC full bridge inverter circuit, a charging module high frequency transformer, a charging module high frequency rectifying circuit, a charging module anti-backflow DC output circuit, and charging
  • the module PWM isolating the driving control circuit and the charging module controller, wherein the input end of the DC input EMI filter circuit is connected with the output end of the high voltage DC converter, and the input end of the charging module LLC full bridge inverter circuit and the output of the DC input EMI filter circuit
  • the terminal is connected, the output end of the charging module LLC full-bridge inverter circuit is connected with the primary coil of the charging module high-frequency transformer, and the secondary coil of the charging module high-frequency transformer is connected with the input end of the charging module high-frequency rectifier circuit, and the charging module is high-frequency.
  • the output end of the rectifier circuit is connected with the input end of the DC charging anti-backflow DC output circuit, and the output end of the charging module anti-backflow DC output circuit is connected with the charging vehicle, and the charging module controller drives the charging module LLC through the charging module PWM isolation driving control circuit.
  • Switching tube of bridge inverter circuit, charging module is high Output voltage of the rectifier circuit, the current through charging module PWM control circuit samples isolated drive to the charging module controller.
  • the present invention specifically describes the DC power of the output charger being converted to the DC charging voltage required by the electric vehicle by setting the DC charging module in the charger.
  • the charging module LLC full-bridge inverter circuit is a circuit for converting the voltage in the charging module. After the inverter is converted into an alternating current, the voltage is converted by the high-frequency transformer, and finally the voltage of the direct-current rectified output is the charging voltage required for the electric vehicle.
  • the charging module LLC full-bridge inverter circuit in the DC charging module includes four switching tubes and peripheral circuits thereof, and the four switching tubes are gates of Q21, Q22, Q23, Q24, Q21, and gates of Q22, respectively.
  • the gate of Q23 and the gate of Q24 are connected to the high voltage DC conversion PWM isolation drive control circuit.
  • the emitter of Q21, the collector of Q22, the emitter of Q23, the collector of Q24 are all connected with high voltage DC conversion high frequency transformer T22.
  • the primary coil is connected, the collector of Q21 and the collector of Q23 are connected to the positive terminal of the aluminum electrolytic capacitor C22, the emitter of Q22 and the emitter of Q24 are connected to the negative terminal of the aluminum electrolytic capacitor C22, and the charging module is high-frequency rectified.
  • the circuit comprises a bridge rectifier circuit composed of diodes D29, D30, D31, D32; the charging module anti-backflow DC output circuit comprises a diode D28, an anode of the diode D28 and a bridge rectifier composed of diodes D29, D30, D31, D32 The output of the circuit is connected at the positive end, and the cathode of the diode D8 is connected to the input of the electric vehicle.
  • connection relationship of the charging module LLC full-bridge inverter circuit is specifically described, and the charging module LLC full-bridge inverter circuit completes the current and voltage conversion tasks through the above-mentioned circuit connection relationship.
  • the four switching tubes Q21, Q22, Q23, and Q24 of the charging module LLC full-bridge inverter circuit of the above charging device are power devices; the diodes D29, D30, D31, and D32 in the high-frequency rectifying circuit of the charging module are power devices.
  • the diode D28 in the charging module anti-backflow DC output circuit is a power device; the above power device is mounted on the second heat sink; the second heat sink is an air-cooled and/or liquid-cooled heat sink; and the charging module control in the DC charging module
  • the PWM isolation driving circuit of the charging module and the charging module are packaged in the second heat conducting housing, and the charging module controller and the charging module PWM isolation driving circuit in the DC charging module are isolated from the second heat sink.
  • the present invention is installed on a dedicated large-volume heat sink by a high-power heating electronic device of a full-bridge inverter circuit of a charging module LLC, including a switching tube of an LLC full-bridge resonant circuit, a high-speed rectifier diode, and an AC rectifier diode. Cooling; the heat sink is cooled by air or liquid cooling provided by the charger.
  • the traditional 15KW high-density active air-cooled DC charging module uses two small DC fans. The heat dissipation of the module is completely dependent on the DC fan. The service life of the fan directly determines the service life of the module.
  • the traditional DC charging module topology uses a bridgeless Vienna rectifier circuit and a three-level LLC resonant circuit, using a large number of FETs in parallel to achieve high-power output, structure Complex, too many components, increased cost
  • traditional 15KW DC density module with high power density, large capacitance capacitors use electrolyte-type aluminum electrolytic capacitors, the temperature rise of a single DC charging module at full load output At 18 ° C, the electrolysis temperature rise of the heat sink close to the module is >30 ° C.
  • the high temperature and harsh environment will seriously affect the service life of the aluminum electrolytic capacitor.
  • the present invention only needs to dissipate heat from the heat sink, has a simple structure, and has an excellent heat dissipation effect.
  • the charging module controller and the charging module PWM isolation driving circuit in the DC charging module are packaged in the second heat conducting housing, the charging module controller and the charging module PWM isolation driving circuit in the DC charging module and the first
  • the two heat sink isolation settings further complete the thermal isolation of the charging module charging module controller and the charging module PWM isolation driving circuit and the high-power heating device, thereby further improving the IP protection level of the charging device, in particular, improving the harsh environment of the system. Use life Life.
  • switching tubes Q21, Q22, Q23, and Q24 in the DC charging module may be IGBT devices or SIC power modules.
  • the switch tube of the present invention uses an insulated gate bipolar transistor IGBT, or a silicon carbide SIC power module replaces a field effect transistor (MOSFET) used in a conventional DC charging power supply module, and a silicon carbide SIC.
  • the power module has low loss, high efficiency and high temperature resistance; insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor), insulated gate bipolar transistor, which is made of BJT (bipolar transistor) and MOS (insulated gate type)
  • the field-effect transistor consists of a composite fully-regulated voltage-driven power semiconductor device that combines the advantages of high input impedance of the MOSFET and low on-voltage drop of the GTR.
  • the GTR saturation voltage is reduced, the current carrying density is large, but the driving current is large; the MOSFET driving power is small, the switching tube speed is fast, but the conduction voltage drop is large, and the current carrying density is small.
  • the IGBT combines the advantages of the above two devices, with low driving power and reduced saturation voltage.
  • the collector emission voltage can reach 1200V, the average forward current is 600A, and the maximum allowable DC current is 750A. Therefore, the transistor has the ability to withstand high voltage and large current.
  • the number of field effect MOS transistors is nearly 13 times that of the insulated gate bipolar transistor I GBT; compared with the previous circuit, the number of field effect transistors used in the PFC circuit is the insulated gate bipolar transistor.
  • the number of field effect transistors used in the LLC full bridge resonant circuit 33 is 26 times that of the insulated gate bipolar transistor. Therefore, replacing the field effect transistor (MOSFET) used in the conventional DC charging power supply module by the insulated gate bipolar transistor (I GBT) not only reduces the component usage in the DC charging module but also carries a larger output power.
  • MOSFET field effect transistor
  • I GBT insulated gate bipolar transistor

Abstract

A high voltage direct current power distribution-based electric vehicle charging station, comprising a high voltage circuit breaker, a high voltage direct current conversion device and a charger; a three-phase high voltage input voltage is connected to the high voltage direct current conversion device by means of the high voltage circuit breaker, and the high voltage direct current conversion device converts the three-phase high voltage input alternating current into direct current so as to supply power to the charger. By providing the high voltage direct current conversion device, and using a high voltage withstanding switching device, the invention realizes power factor correction and LLC full-bridge inversion, and converts the three-phase high voltage input alternating current into direct current so as to supply power to the charger, simplifying the design of a direct current charging module, improving the power density of the direct current charging module, improving the stability of the charger, and reducing the construction cost of the charging station.

Description

一种基于高压直流配电的电动车充电站Electric vehicle charging station based on high voltage DC power distribution 技术领域Technical field
本发明涉及充电站技术领域，特别涉及一种基于高压直流配电的电动车充电站。The invention relates to the technical field of charging stations, in particular to an electric vehicle charging station based on high voltage direct current power distribution.
背景技术Background technique
随着电动汽车的普及，大功率充电设备应用越来越多，大功率电动汽车充电站也越来越多，传统的大功率充电站设备结构复杂，元件繁多，效率低，能耗大，返修率高，建设成本高，占地面积大，而且大功率电动汽车充电站需要输入大功率，一旦输入功率超过150KW，按照供电局的操作要求必须在充电站的输入端另外加装高压变压器柜，而不能直接接入三相五线380VAC交流电，而传统的高压变压器柜的关键部件是50HZ三相干式安全隔离变压器，体积庞大，成本昂贵。急需突破一种低成本、高可靠的大功率充电站技术。With the popularization of electric vehicles, more and more high-power charging equipment applications, high-power electric vehicle charging stations are also more and more, the traditional high-power charging station equipment structure is complex, many components, low efficiency, high energy consumption, repair The rate is high, the construction cost is high, the floor space is large, and the high-power electric vehicle charging station needs to input high power. Once the input power exceeds 150KW, according to the operation requirements of the power supply bureau, a high-voltage transformer cabinet must be installed at the input end of the charging station. It is not possible to directly access the three-phase five-wire 380VAC AC. The key component of the traditional high-voltage transformer cabinet is the 50HZ three-phase dry safety isolating transformer, which is bulky and expensive. There is an urgent need to break through a low-cost, high-reliability high-power charging station technology.
发明内容Summary of the invention
本发明的主要目的是本发明技术方案旨在提供一种基于高压直流配电的电动车充电站，突破一种低本本、高可靠、大功率的充电站技术。The main object of the present invention is to provide an electric vehicle charging station based on high voltage direct current power distribution, which breaks through a low cost, high reliability, high power charging station technology.
为实现上述目的，本发明提出的一种基于高压直流配电的电动车充电站，其特征在于，包括高压断路器、高压直流变换装置和充电机，其中：三相高压输入电压通过高压断路器与高压直流变换装置连接，高压直流变换装置将三相高压输入交流电变换为直流电供电至充电机。To achieve the above object, an electric vehicle charging station based on high voltage DC power distribution according to the present invention is characterized in that it comprises a high voltage circuit breaker, a high voltage DC converter and a charger, wherein: the three-phase high voltage input voltage passes through the high voltage circuit breaker. Connected to the high-voltage DC converter, the high-voltage DC converter converts the three-phase high-voltage input AC into a DC power supply to the charger.
优选地，高压变压器输入交流电压为10Kv，输出交流电压范围为0.4Kv～4Kv；上述高压直流变换装置输入电压范围为0.4Kv～4Kv三相交流电，输出直流配电，输出的直流配电作为充电站内充电机的供电电源。Preferably, the high-voltage transformer input AC voltage is 10Kv, the output AC voltage range is 0.4Kv～4Kv; the above-mentioned high-voltage DC converter input voltage range is 0.4Kv～4Kv three-phase alternating current, output DC power distribution, and output DC power distribution is used for charging The power supply for the charger inside the station.
优选地，上述高压直流变换装置包括有配电交流输入EMI滤波电路、配电工频整流电路、配电功率因素校正电路、配电LLC全桥逆变电路、配电高频变压器、配电高频整流电路、配电防倒灌直流输出电路、配电PWM隔离驱 动控制电路、配电控制器，其中配电交流输入EMI滤波电路的输入端与高压断路器的输出端连接，配电工频整流电路的输入端与交流输入EMI滤波电路的输出端连接，配电工频整流电路的输出端与配电功率因素校正电路的输入端连接，配电功率因素校正电路的输出端与配电LLC全桥逆变电路的输入端连接，配电高频变压器的输入线圈与配电LLC全桥逆变电路的输出端连接，配电高频变压器的输出线圈与配电高频整流电路的输入端连接，配电高频整流电路的输出端通过配电防倒灌直流输出电路与充电机的输入端连接，配电控制器通过配电PWM隔离驱动控制电路与配电功率因素校正电路及配电LLC全桥逆变电路连接，配电高频整流电路的输出端通过配电PWM隔离驱动控制电路与配电控制器连接。Preferably, the high-voltage DC converter comprises a power distribution AC input EMI filter circuit, an electrical frequency rectifier circuit, a power distribution factor correction circuit, a power distribution LLC full-bridge inverter circuit, a power distribution high-frequency transformer, and a high power distribution. Frequency rectification circuit, power distribution anti-backflow DC output circuit, power distribution PWM isolation drive a control circuit and a power distribution controller, wherein an input end of the power distribution AC input EMI filter circuit is connected to an output end of the high voltage circuit breaker, and an input end of the electrical frequency rectifier circuit is connected with an output end of the AC input EMI filter circuit, The output end of the electric power frequency rectification circuit is connected with the input end of the power distribution factor correction circuit, and the output end of the power distribution factor correction circuit is connected with the input end of the power distribution LLC full-bridge inverter circuit, and the input of the power distribution high-frequency transformer is connected. The coil is connected with the output end of the power distribution LLC full-bridge inverter circuit, and the output coil of the distribution high-frequency transformer is connected with the input end of the power distribution high-frequency rectifier circuit, and the output end of the power distribution high-frequency rectifier circuit is distributed through the power distribution to prevent backflow DC The output circuit is connected to the input end of the charger, and the power distribution controller is connected to the power distribution factor correction circuit and the power distribution LLC full-bridge inverter circuit through the power distribution PWM isolation drive control circuit, and the output end of the power distribution high-frequency rectifier circuit passes The power distribution PWM isolated drive control circuit is connected to the power distribution controller.
优选地，上述配电工频整流电路包括有由二极管D1、D2、D3、D4、D5、D6组成的桥式整流电路；上述配电功率因素校正电路包括有开关管Q5，电容C1、C2，二极管D7，变压器T1，电感L1，其中Q5的门极与高压直流变换PWM隔离驱动控制电路连接，Q5的集电极与二极管D7的阳极连接及与电感L1的一端连接，Q5的发射极与变压器T1的初级线圈连接，变压器T1的次级线圈与高压直流变换PWM隔离驱动控制电路连接，变压器T1的初级线圈还与电容C1、C2的一端连接，电容C1的另一端与电感L1的另一端连接，C2的另一端与二极管D7的阴极连接；上述配电LLC全桥逆变电路包括有四个开关管及其外围电路，开关管分别是Q1、Q2、Q3、Q4,其中Q1的门极、Q2的门极、Q3的门极、Q4的门极都与配电PWM隔离驱动控制电路连接，Q1的发射极、Q2的集电极、Q3的发射极、Q4的集电极都与配电高频变压器T2的初级线圈连接，Q1的集电极及Q3的集电极与与二极管D7的阴极连接，Q2的发射极及Q4的发射极都与与变压器T1的初级线圈连接，配电高频整流电路包括有由二极管D9、D10、D11、D12组成的桥式整流电路；配电防倒灌直流输出电路包括有二极管D8，二极管D8的阳极与由二极管D9、D10、D11、D12组成的桥式整流电路的输出端连接，二极管D8的阴极与充电机的输入端连接。Preferably, the above-mentioned electrical frequency rectification circuit comprises a bridge rectifier circuit composed of diodes D1, D2, D3, D4, D5, D6; the power distribution factor correction circuit comprises a switch tube Q5, capacitors C1, C2, Diode D7, transformer T1, inductor L1, wherein the gate of Q5 is connected to the high voltage DC conversion PWM isolation drive control circuit, the collector of Q5 is connected to the anode of diode D7 and connected to one end of inductor L1, the emitter of Q5 and transformer T1 The primary coil is connected, the secondary coil of the transformer T1 is connected to the high-voltage DC-transformed PWM isolation drive control circuit, the primary coil of the transformer T1 is also connected to one end of the capacitors C1 and C2, and the other end of the capacitor C1 is connected to the other end of the inductor L1. The other end of C2 is connected to the cathode of the diode D7; the above-mentioned power distribution LLC full-bridge inverter circuit includes four switch tubes and peripheral circuits thereof, and the switch tubes are Q1, Q2, Q3, and Q4, respectively, and the gate of Q1, Q2 The gate of the gate, the gate of Q3, and the gate of Q4 are all connected to the power distribution PWM isolation drive control circuit. The emitter of Q1, the collector of Q2, the emitter of Q3, and the collector of Q4 are all connected to the distribution high frequency transformer. The beginning of T2 The coil is connected, the collector of Q1 and the collector of Q3 are connected to the cathode of diode D7, the emitter of Q2 and the emitter of Q4 are connected to the primary coil of transformer T1, and the distribution high frequency rectifier circuit includes a diode. Bridge rectifier circuit composed of D9, D10, D11, D12; power distribution anti-backflow DC output circuit includes diode D8, the anode of diode D8 is connected with the output of the bridge rectifier circuit composed of diodes D9, D10, D11, D12 The cathode of diode D8 is connected to the input of the charger.
优选地，上述配电工频整流电路中的二极管D1、D2、D3、D4、D5、D6是功率器件；配电功率因素校正电路中的二极管D7及开关管Q5是功率器件；配电LLC全桥逆变电路中的I GBT器件Q1、Q2、Q3、Q4是功率器件；配电高频整流电路中的二极管D9、D10、D11、D12是功率器件；配电防倒灌直流输 出电路中的二极管D8是功率器件；上述功率器件安装在第一散热器上；第一散热器采用风冷和/或液冷散热器；高压直流变换装置的配电控制器和配电PWM隔离驱动电路封装在第一导热壳体内，高压直流变换装置的配电控制器及配电PWM隔离驱动电路，与第一散热器隔离设置。Preferably, the diodes D1, D2, D3, D4, D5, and D6 in the above-mentioned electric power frequency rectifying circuit are power devices; the diode D7 and the switching tube Q5 in the power distribution factor correction circuit are power devices; The I GBT devices Q1, Q2, Q3, and Q4 in the bridge inverter circuit are power devices; the diodes D9, D10, D11, and D12 in the power distribution high-frequency rectifier circuit are power devices; The diode D8 in the output circuit is a power device; the above power device is mounted on the first heat sink; the first heat sink uses an air-cooled and/or liquid-cooled heat sink; the power distribution controller of the high-voltage DC converter and the power distribution PWM isolation The driving circuit is packaged in the first heat conducting housing, and the power distribution controller of the high voltage DC converter and the power distribution PWM isolation driving circuit are disposed separately from the first heat sink.
优选地，上述充电机输入电压为0.8Kv～1Kv直流电压，包括有直流断路器、直流充电模块、非车载直流充电机控制器、开关K，其中直流充电模块的输入端与直流断路器的输出端连接，直流充电模块的输出端与开关K连接，且开关K和直流断路器的通断由非车载直流充电机控制器控制。Preferably, the input voltage of the charger is 0.8Kv to 1Kv DC voltage, including a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K, wherein the input of the DC charging module and the output of the DC breaker The terminal is connected, the output of the DC charging module is connected to the switch K, and the switching of the switch K and the DC breaker is controlled by the off-board DC charger controller.
优选地，上述充电机中的直流充电模块包括有直流输入EMI滤波电路、充电模块LLC全桥逆变电路、充电模块高频变压器、充电模块高频整流电路、充电模块防倒灌直流输出电路、充电模块PWM隔离驱动控制电路、充电模块控制器，其中直流输入EMI滤波电路的输入端与高压直流变换装置的输出端连接，充电模块LLC全桥逆变电路的输入端与直流输入EMI滤波电路的输出端连接，充电模块LLC全桥逆变电路的输出端与充电模块高频变压器的初级线圈连接，充电模块高频变压器的次级线圈与充电模块高频整流电路的输入端连接，充电模块高频整流电路的输出端与直流充电防倒灌直流输出电路的输入端连接，充电模块防倒灌直流输出电路的输出端与充电汽车连接，充电模块控制器通过充电模块PWM隔离驱动控制电路驱动充电模块LLC全桥逆变电路的开关管，充电模块高频整流电路的输出电压、电流还通过充电模块PWM隔离驱动控制电路采样给充电模块控制器。Preferably, the DC charging module in the charging device comprises a DC input EMI filter circuit, a charging module LLC full bridge inverter circuit, a charging module high frequency transformer, a charging module high frequency rectifying circuit, a charging module anti-backflow DC output circuit, and charging The module PWM isolating the driving control circuit and the charging module controller, wherein the input end of the DC input EMI filter circuit is connected with the output end of the high voltage DC converter, and the input end of the charging module LLC full bridge inverter circuit and the output of the DC input EMI filter circuit The terminal is connected, the output end of the charging module LLC full-bridge inverter circuit is connected with the primary coil of the charging module high-frequency transformer, and the secondary coil of the charging module high-frequency transformer is connected with the input end of the charging module high-frequency rectifier circuit, and the charging module is high-frequency. The output end of the rectifier circuit is connected with the input end of the DC charging anti-backflow DC output circuit, and the output end of the charging module anti-backflow DC output circuit is connected with the charging vehicle, and the charging module controller drives the charging module LLC through the charging module PWM isolation driving control circuit. Switching tube of bridge inverter circuit, charging module high frequency Output voltage limiting circuit, the current through charging module PWM control circuit samples isolated drive to the charging module controller.
优选地，上述直流充电模块中的充电模块LLC全桥逆变电路包括四个开关管及其外围电路，四个开关管分别是Q21、Q22、Q23、Q24，Q21的门极、Q22的门极、Q23的门极、Q24的门极都与高压直流变换PWM隔离驱动控制电路连接，Q21的发射极、Q22的集电极、Q23的发射极、Q24的集电极都与高压直流变换高频变压器T22的初级线圈连接，Q21的集电极及Q23的集电极与与铝电解电容C22的正端连接，Q22的发射极及Q24的发射极都与铝电解电容C22的负端连接，充电模块高频整流电路包括有由二极管D29、D30、D31、D32组成的桥式整流电路；充电模块防倒灌直流输出电路包括有二极管D28，二极管D28的阳极与由二极管D29、D30、D31、D32组成的桥式整流电路的输出端正端连接，二极管D8的阴极与电动车的输入端连接。 Preferably, the charging module LLC full-bridge inverter circuit in the DC charging module includes four switching tubes and peripheral circuits thereof, and the four switching tubes are gates of Q21, Q22, Q23, Q24, Q21, and gates of Q22, respectively. The gate of Q23 and the gate of Q24 are connected to the high voltage DC conversion PWM isolation drive control circuit. The emitter of Q21, the collector of Q22, the emitter of Q23, the collector of Q24 are all connected with high voltage DC conversion high frequency transformer T22. The primary coil is connected, the collector of Q21 and the collector of Q23 are connected to the positive terminal of the aluminum electrolytic capacitor C22, the emitter of Q22 and the emitter of Q24 are connected to the negative terminal of the aluminum electrolytic capacitor C22, and the charging module is high-frequency rectified. The circuit comprises a bridge rectifier circuit composed of diodes D29, D30, D31, D32; the charging module anti-backflow DC output circuit comprises a diode D28, an anode of the diode D28 and a bridge rectifier composed of diodes D29, D30, D31, D32 The output of the circuit is connected at the positive end, and the cathode of the diode D8 is connected to the input of the electric vehicle.
优选地，上述充电机的充电模块LLC全桥逆变电路的四个开关管Q21、Q22、Q23、Q24是功率器件；充电模块高频整流电路中的二极管D29、D30、D31、D32是功率器件；充电模块防倒灌直流输出电路中的二极管D28是功率器件；上述功率器件安装在第二散热器上；第二散热器是风冷和/或液冷散热器；直流充电模块中的充电模块控制器和充电模块PWM隔离驱动电路封装在第二导热壳体内，直流充电模块中的充电模块控制器及充电模块PWM隔离驱动电路与第二散热器隔离设置。Preferably, the four switching tubes Q21, Q22, Q23, and Q24 of the charging module LLC full-bridge inverter circuit of the above charging device are power devices; the diodes D29, D30, D31, and D32 in the high-frequency rectifying circuit of the charging module are power devices. The diode D28 in the charging module anti-backflow DC output circuit is a power device; the above power device is mounted on the second heat sink; the second heat sink is an air-cooled and/or liquid-cooled heat sink; and the charging module control in the DC charging module The PWM isolation driving circuit of the charging module and the charging module are packaged in the second heat conducting housing, and the charging module controller and the charging module PWM isolation driving circuit in the DC charging module are isolated from the second heat sink.
优选地，上述直流充电模块中的开关管Q21、Q22、Q23、Q24均可采用IGBT器件或SIC功率模块。Preferably, the switching tubes Q21, Q22, Q23, and Q24 in the DC charging module may be IGBT devices or SIC power modules.
本发明与现有技术相比，具有如下技术效果：Compared with the prior art, the invention has the following technical effects:
1)本发明高压直流变换装置的输入电压范围为3Kv～10Kv三相交流电压，输出为直流电压，输出的直流电压作为充电站内充电机的供电电压，解决了高压输入电压的整流及对输入的功率因素校正；1) The input voltage range of the high-voltage DC converter of the present invention ranges from 3Kv to 10Kv three-phase AC voltage, the output is DC voltage, and the output DC voltage is used as the power supply voltage of the charger in the charging station, which solves the rectification of the high-voltage input voltage and the input. Power factor correction;
2)本发明高压直流的高频逆变将高压直流逆变成高频脉冲交流，再通过高频变压器降压成需求电压；变压器使用高功率密度的高频变压器，变压器体积小、重量轻，成本低廉；2) The high-voltage direct current high-frequency inverter of the invention inverts high-voltage direct current into high-frequency pulsed alternating current, and then is stepped down to a required voltage by a high-frequency transformer; the transformer uses a high-power density high-frequency transformer, and the transformer is small in size and light in weight. low cost;
3)本发明高频整流电路采用快速整流管组成的桥式整流；桥式整流对变压器要求最低，变压器的利用率最高，功率扩展便利；3) The high-frequency rectification circuit of the invention adopts bridge rectification composed of a fast rectifier tube; the bridge rectification has the lowest requirements on the transformer, the utilization of the transformer is the highest, and the power expansion is convenient;
4)本发明高压直流变换装置包括有配电交流输入EMI滤波电路、配电工频整流电路、基于IGBT配电功率因素校正电路、基于IGBT配电LLC全桥逆变电路、配电高频变压器、配电高频整流电路、配电防倒灌直流输出电路、配电PWM隔离驱动控制电路、配电控制器，其中配电交流输入EMI滤波电路、配电工频整流电路、基于IGBT配电功率因素校正电路、基于IGBT配电LLC全桥逆变电路、配电高频变压器、配电高频整流电路、配电防倒灌直流输出电路构成功率主回路，本发明配电PWM隔离驱动控制电路及配电控制器与功率主回路高耐压隔离；4) The high-voltage DC converter of the invention comprises a distribution AC input EMI filter circuit, an electrical frequency rectification circuit, an IGBT power distribution factor correction circuit, an IGBT power distribution LLC full-bridge inverter circuit, and a distribution high-frequency transformer. , distribution high-frequency rectifier circuit, power distribution anti-backflow DC output circuit, power distribution PWM isolation drive control circuit, power distribution controller, among which power distribution AC input EMI filter circuit, with electrical frequency rectifier circuit, based on IGBT power distribution Factor correction circuit, IGBT power distribution LLC full-bridge inverter circuit, power distribution high-frequency transformer, power distribution high-frequency rectifier circuit, power distribution anti-backflow DC output circuit constitute a power main loop, the power distribution PWM isolation drive control circuit of the present invention The power distribution controller is separated from the power main circuit by high withstand voltage;
5)本发明关键开关元件使用两个或多个绝缘栅双极型晶体管(IGBT)串联来解决高输入电压的问题；5) The key switching element of the present invention uses two or more insulated gate bipolar transistors (IGBTs) in series to solve the problem of high input voltage;
6)本发明采用直流配电，因直流配电没有相位和功角，不存在稳定问题， 只要电压降，网损等技术指标符合要求，就可达到传输的目的，无需考虑稳定问题；只要输出电压一致，直流配电基本不需要处理就可以串联、并联，扩大输出功率；且直流配电材料成本比三相四线的交流输电低，仅仅需要交流输电的1/3或更低。6) The present invention uses DC power distribution, since there is no phase and power angle of the DC power distribution, and there is no stability problem. As long as the voltage drop, network loss and other technical indicators meet the requirements, the transmission can be achieved without regard to the stability problem; as long as the output voltage is consistent, the DC power distribution can be connected in series or in parallel without increasing the processing, and the output power can be expanded; The material cost is lower than the three-phase four-wire AC transmission, and only needs 1/3 or less of the AC transmission.
7)本发明充电机的直流充电模块改变传统的三相四线380VAC交流配电模式，简化直流充电模块电磁兼容要求及设计，去除整流及功率因素校正；关键开关元件使用IGBT(绝缘栅双极型晶体管)或SIC功率模块替代传统直流充电电源模块中使用的场效应管(MOSFET)，简化LLC全桥谐振电路结构；直流充电模块功率密度大大增加，转换效率更高，直流充电机的设计更加灵活；7) The DC charging module of the charger of the invention changes the traditional three-phase four-wire 380VAC AC power distribution mode, simplifies the electromagnetic compatibility requirements and design of the DC charging module, removes the rectification and power factor correction; the key switching components use IGBT (insulated gate bipolar) The transistor or SIC power module replaces the field effect transistor (MOSFET) used in the traditional DC charging power module, simplifying the structure of the LLC full-bridge resonant circuit; the power density of the DC charging module is greatly increased, the conversion efficiency is higher, and the design of the DC charger is more flexible;
8)本发明大功率元件安装在大功率元件散热器上；大功率元件散热器是风冷或液冷散热器；仅仅需要对大功率元件散热器散热；高压直流变换装置的配电控制器和配电PWM隔离驱动电路封装在弱电壳体内，弱电壳体与大功率元件散热器隔离实现隔热；8) The high-power component of the invention is mounted on a high-power component heatsink; the high-power component heatsink is an air-cooled or liquid-cooled heatsink; only the heat sink of the high-power component heat sink is required; the power distribution controller of the high-voltage DC converter is The power distribution PWM isolation driving circuit is packaged in the weak current housing, and the weak current housing is insulated from the high power component heat sink to achieve heat insulation;
9)本发明弱电控制电路封装在具有良好散热的壳体内，与大功率发热元件隔热；提高充电机的IP防护等级，提高系统恶劣环境下的使用寿命。9) The weak current control circuit of the invention is packaged in a casing with good heat dissipation, and is insulated from the high-power heating element; the IP protection level of the charger is improved, and the service life in the harsh environment of the system is improved.
本发明是一种设计巧妙，性能优良，方便实用的基于高压的直流配电的电动汽车充电站。The invention is an electric vehicle charging station based on high voltage DC power distribution with ingenious design, excellent performance and convenient and practicality.
附图说明DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.
图1为本发明一种基于高压直流配电的电动车充电站的原理框图；1 is a schematic block diagram of an electric vehicle charging station based on high voltage DC power distribution according to the present invention;
图2为本发明中高压直流变换装置的原理框图；2 is a schematic block diagram of a high voltage DC converter according to the present invention;
图3为本发明中高压直流变换装置的电路原理图；3 is a circuit schematic diagram of a high voltage DC converter according to the present invention;
图4为本发明中充电机的原理框图；Figure 4 is a schematic block diagram of a charger in the present invention;
图5为本发明的充电机中直流充电模块的原理框图； 5 is a schematic block diagram of a DC charging module in a charger of the present invention;
图6为本发明的充电机中直流充电模块的电路原理图。6 is a circuit schematic diagram of a DC charging module in a charger of the present invention.
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。It should be noted that if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present invention, the directional indication is only used to explain in a certain posture (as shown in the drawing) The relative positional relationship between the components, the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.
参照图1-6，本发明提出的一种基于高压直流配电的电动车充电站，其包括高压断路器、高压直流变换装置和充电机，其中：三相高压输入电压通过高压断路器与高压直流变换装置连接，高压直流变换装置将三相高压输入交流电变换为直流电供电至充电机。1-6, the present invention provides an electric vehicle charging station based on high voltage DC power distribution, which comprises a high voltage circuit breaker, a high voltage DC converter and a charger, wherein: the three-phase high voltage input voltage passes through the high voltage circuit breaker and the high voltage The DC converter is connected, and the high-voltage DC converter converts the three-phase high-voltage input AC into a DC power supply to the charger.
在本实施例中，本发明由电网高压直接经高压断路器进入整流器，经过高压二极管全桥整流、功率因素校正升压，再通过全桥逆变进行逆变，轻松实现高频变压输出，再通过全桥整流滤波后输送至非车载电动汽车直流充电机。In the present embodiment, the invention enters the rectifier directly from the high voltage of the power grid through the high voltage circuit breaker, and is fully rectified by the high voltage diode, the power factor is corrected and boosted, and then inverted by the full bridge inverter to easily realize the high frequency variable voltage output. It is then filtered by full-bridge rectification and then sent to the off-board electric vehicle DC charger.
本发明通过电路处理后直接输送直流电，供电至充电机。直流输电的特点：1、直流输电没有相位和功角，不存在稳定问题，只要电压降，网损等技术指标符合要求，就可达到传输的目的，无需考虑稳定问题；2、只要输出电压一致，直流输电基本不需要处理就可以串联、并联，扩大输出功率；3、直流输电材料成本比三相五线的交流输电低，仅仅需要交流输电的1/3或更低。The invention directly delivers direct current through the circuit processing and supplies power to the charger. Characteristics of DC transmission: 1. There is no phase and power angle of DC transmission. There is no stability problem. As long as the voltage drop, network loss and other technical indicators meet the requirements, the transmission can be achieved without considering the stability problem. 2. As long as the output voltage is consistent. The direct current transmission can be connected in series or in parallel without any treatment, and the output power is expanded. 3. The cost of the direct current transmission material is lower than that of the three-phase five-wire alternating current, and only 1/3 or lower of the alternating current transmission is required.
进一步地，上述高压直流变换装置输入电压范围为0.4Kv～4Kv三相交流电，输出直流配电，输出的直流配电作为充电站内充电机的供电电源。Further, the above-mentioned high-voltage DC converter has an input voltage range of 0.4Kv to 4Kv three-phase alternating current, and outputs DC power distribution, and the output DC power distribution is used as a power supply for the charger in the charging station.
在本实施例中，具体讲述本发明的适用条件及范围。通过该适用条件及 范围可以让本发明得到广泛地应用，具有适用强的特点。In the present embodiment, the applicable conditions and ranges of the present invention are specifically described. Pass the applicable conditions and The scope allows the invention to be widely applied and has strong application characteristics.
进一步地，上述高压直流变换装置包括有配电交流输入EMI滤波电路、配电工频整流电路、配电功率因素校正电路、配电LLC全桥逆变电路、配电高频变压器、配电高频整流电路、配电防倒灌直流输出电路、配电PWM隔离驱动控制电路、配电控制器，其中配电交流输入EMI滤波电路的输入端与高压断路器的输出端连接，配电工频整流电路的输入端与交流输入EMI滤波电路的输出端连接，配电工频整流电路的输出端与配电功率因素校正电路的输入端连接，配电功率因素校正电路的输出端与配电LLC全桥逆变电路的输入端连接，配电高频变压器的输入线圈与配电LLC全桥逆变电路的输出端连接，配电高频变压器的输出线圈与配电高频整流电路的输入端连接，配电高频整流电路的输出端通过配电防倒灌直流输出电路与充电机的输入端连接，配电控制器通过配电PWM隔离驱动控制电路与配电功率因素校正电路及配电LLC全桥逆变电路连接，配电高频整流电路的输出端通过配电PWM隔离驱动控制电路与配电控制器连接。Further, the high-voltage DC converter includes a power distribution AC input EMI filter circuit, an electrical frequency rectifier circuit, a power distribution factor correction circuit, a power distribution LLC full-bridge inverter circuit, a power distribution high-frequency transformer, and a high power distribution. Frequency rectification circuit, power distribution anti-backflow DC output circuit, power distribution PWM isolation drive control circuit, power distribution controller, wherein the input end of the power distribution AC input EMI filter circuit is connected with the output end of the high voltage circuit breaker, and is equipped with electric frequency frequency rectification The input end of the circuit is connected with the output end of the AC input EMI filter circuit, and the output end of the electric frequency rectification circuit is connected with the input end of the power distribution factor correction circuit, and the output end of the power distribution factor correction circuit and the power distribution LLC are all The input end of the bridge inverter circuit is connected, the input coil of the distribution high-frequency transformer is connected with the output end of the power distribution LLC full-bridge inverter circuit, and the output coil of the distribution high-frequency transformer is connected with the input end of the distribution high-frequency rectifier circuit. The output end of the distribution high-frequency rectification circuit is connected to the input end of the charger through the power distribution anti-backflow DC output circuit, and the power distribution controller is driven by the power distribution PWM isolation drive. The control circuit and power factor correction circuit and the power distribution switchboard LLC full bridge inverter circuit connected to the output terminal of the power distribution by the power distribution frequency rectifier circuit isolation PWM drive control circuit is connected with the distribution controller.
在本实施例中，本发明中高压输入的配电功率因素校正电路主要解决了高压输入电压的整流及对输入的功率因素校正；高压直流的配电LLC全桥逆变电路采用高压变频逆变技术，将高压直流逆变成高频脉冲交流，再通过高频变压器降压成需求电压；变压器使用高功率密度的高频变压器，变压器体积小、重量轻，成本低廉；配电防倒灌直流输出电路采用快速整流管组成的桥式整流，桥式整流对变压器要求最低，变压器的利用率最高，功率扩展便利；配电PWM隔离驱动控制电路包括控制器及其外围电路，外围电路包括通信处理电路，控制电路、采样及其处理电路等。In the present embodiment, the power supply factor correction circuit of the high voltage input of the present invention mainly solves the rectification of the high voltage input voltage and the power factor correction of the input; the high voltage DC power distribution LLC full bridge inverter circuit adopts the high voltage frequency conversion inverter. Technology, inverting high-voltage DC into high-frequency pulse AC, and then stepping down to a demand voltage through a high-frequency transformer; the transformer uses a high-power density high-frequency transformer, the transformer is small in size, light in weight, low in cost; power distribution anti-backflow DC output The circuit adopts bridge rectifier composed of fast rectifier tube. The bridge rectifier has the lowest requirements on the transformer, the utilization of the transformer is the highest, and the power expansion is convenient. The power distribution PWM isolation drive control circuit includes the controller and its peripheral circuits, and the peripheral circuit includes the communication processing circuit. , control circuit, sampling and its processing circuit.
进一步地，上述配电工频整流电路包括有由二极管D1、D2、D3、D4、D5、D6组成的桥式整流电路；上述配电功率因素校正电路包括有开关管Q5，电容C1、C2，二极管D7，变压器T1，电感L1，其中Q5的门极与高压直流变换PWM隔离驱动控制电路连接，Q5的集电极与二极管D7的阳极连接及与电感L1的一端连接，Q5的发射极与变压器T1的初级线圈连接，变压器T1的次级线圈与高压直流变换PWM隔离驱动控制电路连接，变压器T1的初级线圈还与电容 C1、C2的一端连接，电容C1的另一端与电感L1的另一端连接，C2的另一端与二极管D7的阴极连接；上述配电LLC全桥逆变电路包括有四个开关管及其外围电路，开关管分别是Q1、Q2、Q3、Q4,其中Q1的门极、Q2的门极、Q3的门极、Q4的门极都与配电PWM隔离驱动控制电路连接，Q1的发射极、Q2的集电极、Q3的发射极、Q4的集电极都与配电高频变压器T2的初级线圈连接，Q1的集电极及Q3的集电极与与二极管D7的阴极连接，Q2的发射极及Q4的发射极都与与变压器T1的初级线圈连接，配电高频整流电路包括有由二极管D9、D10、D11、D12组成的桥式整流电路；配电防倒灌直流输出电路包括有二极管D8，二极管D8的阳极与由二极管D9、D10、D11、D12组成的桥式整流电路的输出端连接，二极管D8的阴极与充电机的输入端连接。Further, the above-mentioned electrical frequency rectification circuit comprises a bridge rectifier circuit composed of diodes D1, D2, D3, D4, D5, D6; the power distribution factor correction circuit comprises a switch tube Q5, capacitors C1, C2, Diode D7, transformer T1, inductor L1, wherein the gate of Q5 is connected to the high voltage DC conversion PWM isolation drive control circuit, the collector of Q5 is connected to the anode of diode D7 and connected to one end of inductor L1, the emitter of Q5 and transformer T1 The primary coil is connected, the secondary coil of the transformer T1 is connected to the high-voltage DC-transformed PWM isolated drive control circuit, and the primary coil of the transformer T1 is also connected to the capacitor One end of C1 and C2 are connected, the other end of the capacitor C1 is connected to the other end of the inductor L1, and the other end of the C2 is connected to the cathode of the diode D7. The above-mentioned power distribution LLC full-bridge inverter circuit includes four switching tubes and peripheral circuits thereof. The switch tubes are Q1, Q2, Q3, and Q4, respectively, wherein the gate of Q1, the gate of Q2, the gate of Q3, and the gate of Q4 are all connected to the power distribution PWM isolation drive control circuit, the emitter of Q1, Q2 The collector, the emitter of Q3, and the collector of Q4 are all connected to the primary coil of the distribution high frequency transformer T2, the collector of Q1 and the collector of Q3 are connected to the cathode of diode D7, the emitter of Q2 and the Q4 The emitter is connected to the primary coil of the transformer T1, and the power distribution high-frequency rectifier circuit includes a bridge rectifier circuit composed of diodes D9, D10, D11, and D12; the power distribution anti-backflow DC output circuit includes a diode D8 and a diode D8. The anode is connected to the output of a bridge rectifier circuit consisting of diodes D9, D10, D11, D12, and the cathode of diode D8 is connected to the input of the charger.
进一步地，上述配电工频整流电路中的二极管D1、D2、D3、D4、D5、D6是功率器件；配电功率因素校正电路中的二极管D7及开关管Q5是功率器件；配电LLC全桥逆变电路中的I GBT器件Q1、Q2、Q3、Q4是功率器件；配电高频整流电路中的二极管D9、D10、D11、D12是功率器件；配电防倒灌直流输出电路中的二极管D8是功率器件；上述功率器件安装在第一散热器上；第一散热器采用风冷和/或液冷散热器；高压直流变换装置的配电控制器和配电PWM隔离驱动电路封装在第一导热壳体内，高压直流变换装置的配电控制器及配电PWM隔离驱动电路，与第一散热器隔离设置。Further, the diodes D1, D2, D3, D4, D5, and D6 in the above-mentioned electric power frequency rectifying circuit are power devices; the diode D7 and the switching tube Q5 in the power distribution factor correction circuit are power devices; The I GBT devices Q1, Q2, Q3, and Q4 in the bridge inverter circuit are power devices; the diodes D9, D10, D11, and D12 in the power distribution high-frequency rectifier circuit are power devices; the diodes in the power distribution anti-backflow DC output circuit D8 is a power device; the above power device is mounted on the first heat sink; the first heat sink adopts an air-cooled and/or liquid-cooled heat sink; the power distribution controller of the high-voltage DC converter and the power distribution PWM isolation drive circuit are packaged in the first In a heat-conducting housing, the power distribution controller of the high-voltage DC converter and the power distribution PWM isolation drive circuit are disposed separately from the first heat sink.
在本发明实施例中，高压直流变换装置的配电控制器和配电PWM隔离驱动电路封装在第一导热壳体内，高压直流变换装置的配电控制器及配电PWM隔离驱动电路，与第一散热器隔离设置，实现控制电路与大功率发热器件的热隔离，且提高充电机的I P防护等级，特别是，提高系统恶劣环境下的使用寿命。In the embodiment of the present invention, the power distribution controller and the power distribution PWM isolation driving circuit of the high voltage DC conversion device are packaged in the first heat conduction housing, the power distribution controller of the high voltage DC conversion device, and the power distribution PWM isolation driving circuit, and the A heat sink is isolated to achieve thermal isolation of the control circuit from the high-power heating device, and to improve the I P protection level of the charger, in particular, to improve the service life of the system in harsh environments.
进一步地，上述充电机输入电压为0.8Kv～1Kv直流电压，包括有直流断路器、直流充电模块、非车载直流充电机控制器、开关K，其中直流充电模块的输入端与直流断路器的输出端连接，直流充电模块的输出端与开关K连接，且开关K和直流断路器的通断由非车载直流充电机控制器控制。Further, the input voltage of the charger is 0.8Kv to 1Kv DC voltage, including a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K, wherein the input of the DC charging module and the output of the DC breaker The terminal is connected, the output of the DC charging module is connected to the switch K, and the switching of the switch K and the DC breaker is controlled by the off-board DC charger controller.
在本实施例中，本发明通过在充电机内设置直流断路器、直流充电模块、非车载直流充电机控制器、开关K来控制直流电的电压，以输出电动车所需 的充电电压。In this embodiment, the present invention controls the voltage of the direct current by setting a DC circuit breaker, a DC charging module, an off-board DC charger controller, and a switch K in the charger to output the required electric vehicle. The charging voltage.
进一步地，上述充电机中的直流充电模块包括有直流输入EMI滤波电路、充电模块LLC全桥逆变电路、充电模块高频变压器、充电模块高频整流电路、充电模块防倒灌直流输出电路、充电模块PWM隔离驱动控制电路、充电模块控制器，其中直流输入EMI滤波电路的输入端与高压直流变换装置的输出端连接，充电模块LLC全桥逆变电路的输入端与直流输入EMI滤波电路的输出端连接，充电模块LLC全桥逆变电路的输出端与充电模块高频变压器的初级线圈连接，充电模块高频变压器的次级线圈与充电模块高频整流电路的输入端连接，充电模块高频整流电路的输出端与直流充电防倒灌直流输出电路的输入端连接，充电模块防倒灌直流输出电路的输出端与充电汽车连接，充电模块控制器通过充电模块PWM隔离驱动控制电路驱动充电模块LLC全桥逆变电路的开关管，充电模块高频整流电路的输出电压、电流还通过充电模块PWM隔离驱动控制电路采样给充电模块控制器。Further, the DC charging module in the above charging machine comprises a DC input EMI filter circuit, a charging module LLC full bridge inverter circuit, a charging module high frequency transformer, a charging module high frequency rectifying circuit, a charging module anti-backflow DC output circuit, and charging The module PWM isolating the driving control circuit and the charging module controller, wherein the input end of the DC input EMI filter circuit is connected with the output end of the high voltage DC converter, and the input end of the charging module LLC full bridge inverter circuit and the output of the DC input EMI filter circuit The terminal is connected, the output end of the charging module LLC full-bridge inverter circuit is connected with the primary coil of the charging module high-frequency transformer, and the secondary coil of the charging module high-frequency transformer is connected with the input end of the charging module high-frequency rectifier circuit, and the charging module is high-frequency. The output end of the rectifier circuit is connected with the input end of the DC charging anti-backflow DC output circuit, and the output end of the charging module anti-backflow DC output circuit is connected with the charging vehicle, and the charging module controller drives the charging module LLC through the charging module PWM isolation driving control circuit. Switching tube of bridge inverter circuit, charging module is high Output voltage of the rectifier circuit, the current through charging module PWM control circuit samples isolated drive to the charging module controller.
在本实施例中，具体讲述本发明通过在充电机中直流充电模块的设置，将输出充电机的直流电变换到合适电动车需求的直流充电电压。充电模块LLC全桥逆变电路是充电模块中的电压变换部分的电路，是逆变成交流后，再经过高频变压器变换电压，最后整流输出的直流电的电压为电动车所需的充电电压。In this embodiment, the present invention specifically describes the DC power of the output charger being converted to the DC charging voltage required by the electric vehicle by setting the DC charging module in the charger. The charging module LLC full-bridge inverter circuit is a circuit for converting the voltage in the charging module. After the inverter is converted into an alternating current, the voltage is converted by the high-frequency transformer, and finally the voltage of the direct-current rectified output is the charging voltage required for the electric vehicle.
进一步地，上述直流充电模块中的充电模块LLC全桥逆变电路包括四个开关管及其外围电路，四个开关管分别是Q21、Q22、Q23、Q24，Q21的门极、Q22的门极、Q23的门极、Q24的门极都与高压直流变换PWM隔离驱动控制电路连接，Q21的发射极、Q22的集电极、Q23的发射极、Q24的集电极都与高压直流变换高频变压器T22的初级线圈连接，Q21的集电极及Q23的集电极与与铝电解电容C22的正端连接，Q22的发射极及Q24的发射极都与铝电解电容C22的负端连接，充电模块高频整流电路包括有由二极管D29、D30、D31、D32组成的桥式整流电路；充电模块防倒灌直流输出电路包括有二极管D28，二极管D28的阳极与由二极管D29、D30、D31、D32组成的桥式整流电路的输出端正端连接，二极管D8的阴极与电动车的输入端连接。 Further, the charging module LLC full-bridge inverter circuit in the DC charging module includes four switching tubes and peripheral circuits thereof, and the four switching tubes are gates of Q21, Q22, Q23, Q24, Q21, and gates of Q22, respectively. The gate of Q23 and the gate of Q24 are connected to the high voltage DC conversion PWM isolation drive control circuit. The emitter of Q21, the collector of Q22, the emitter of Q23, the collector of Q24 are all connected with high voltage DC conversion high frequency transformer T22. The primary coil is connected, the collector of Q21 and the collector of Q23 are connected to the positive terminal of the aluminum electrolytic capacitor C22, the emitter of Q22 and the emitter of Q24 are connected to the negative terminal of the aluminum electrolytic capacitor C22, and the charging module is high-frequency rectified. The circuit comprises a bridge rectifier circuit composed of diodes D29, D30, D31, D32; the charging module anti-backflow DC output circuit comprises a diode D28, an anode of the diode D28 and a bridge rectifier composed of diodes D29, D30, D31, D32 The output of the circuit is connected at the positive end, and the cathode of the diode D8 is connected to the input of the electric vehicle.
在本实施例中，具体讲述充电模块LLC全桥逆变电路的连接关系，充电模块LLC全桥逆变电路通过上述电路连接关系完成电流及电压的变换任务。In this embodiment, the connection relationship of the charging module LLC full-bridge inverter circuit is specifically described, and the charging module LLC full-bridge inverter circuit completes the current and voltage conversion tasks through the above-mentioned circuit connection relationship.
进一步地，上述充电机的充电模块LLC全桥逆变电路的四个开关管Q21、Q22、Q23、Q24是功率器件；充电模块高频整流电路中的二极管D29、D30、D31、D32是功率器件；充电模块防倒灌直流输出电路中的二极管D28是功率器件；上述功率器件安装在第二散热器上；第二散热器是风冷和/或液冷散热器；直流充电模块中的充电模块控制器和充电模块PWM隔离驱动电路封装在第二导热壳体内，直流充电模块中的充电模块控制器及充电模块PWM隔离驱动电路与第二散热器隔离设置。Further, the four switching tubes Q21, Q22, Q23, and Q24 of the charging module LLC full-bridge inverter circuit of the above charging device are power devices; the diodes D29, D30, D31, and D32 in the high-frequency rectifying circuit of the charging module are power devices. The diode D28 in the charging module anti-backflow DC output circuit is a power device; the above power device is mounted on the second heat sink; the second heat sink is an air-cooled and/or liquid-cooled heat sink; and the charging module control in the DC charging module The PWM isolation driving circuit of the charging module and the charging module are packaged in the second heat conducting housing, and the charging module controller and the charging module PWM isolation driving circuit in the DC charging module are isolated from the second heat sink.
在本实施例中，本发明通过充电模块LLC全桥逆变电路的大功率发热电子器件，包括LLC全桥谐振电路的开关管、高速整流二极管、交流整流二极管安装在专用的大体积散热器上来散热；散热器通过充电机配备的风冷或液冷来散热。与传统的充电模块比较，传统的15KW功率密度较高的主动风冷式直流充电模块采用2个小直流风机，模块的散热完全依赖于直流风机，风机的使用寿命直接决定了模块的使用寿命。但是直流风机体格越小，内部的零件脆弱，容易损坏，散热效果不佳，在主动风冷的工作模式下，温度、粉尘、潮湿、油污、霉变、盐雾、化学物质等等各类因素严重的损害着直流风机使用寿命；传统的直流充电模块的拓扑结构是采用无桥维也纳整流电路和基于三电平的LLC谐振电路，使用了大量的场效应管并联来实现大功率的输出，结构复杂，元件太多，增加了成本；传统的15KW功率密度较高的直流充电模块中，大容值电容都是使用了电解液式的铝电解电容，单个直流充电模块满载输出时的温升约18℃，部分靠近模块内部散热器的电解温升＞30℃，高温恶劣环境将严重的影响铝电解电容的使用寿命。这样，本发明只需要对散热器进行散热，结构简单，且具有极佳的散热效果。In the present embodiment, the present invention is installed on a dedicated large-volume heat sink by a high-power heating electronic device of a full-bridge inverter circuit of a charging module LLC, including a switching tube of an LLC full-bridge resonant circuit, a high-speed rectifier diode, and an AC rectifier diode. Cooling; the heat sink is cooled by air or liquid cooling provided by the charger. Compared with the traditional charging module, the traditional 15KW high-density active air-cooled DC charging module uses two small DC fans. The heat dissipation of the module is completely dependent on the DC fan. The service life of the fan directly determines the service life of the module. However, the smaller the DC fan is, the internal parts are fragile, easy to damage, and the heat dissipation effect is not good. In the active air-cooled working mode, various factors such as temperature, dust, moisture, oil, mildew, salt spray, chemical substances, etc. Serious damage to the life of the DC fan; the traditional DC charging module topology uses a bridgeless Vienna rectifier circuit and a three-level LLC resonant circuit, using a large number of FETs in parallel to achieve high-power output, structure Complex, too many components, increased cost; traditional 15KW DC density module with high power density, large capacitance capacitors use electrolyte-type aluminum electrolytic capacitors, the temperature rise of a single DC charging module at full load output At 18 ° C, the electrolysis temperature rise of the heat sink close to the module is >30 ° C. The high temperature and harsh environment will seriously affect the service life of the aluminum electrolytic capacitor. Thus, the present invention only needs to dissipate heat from the heat sink, has a simple structure, and has an excellent heat dissipation effect.
在本发明实施例中，通过直流充电模块中的充电模块控制器和充电模块PWM隔离驱动电路封装在第二导热壳体内，直流充电模块中的充电模块控制器及充电模块PWM隔离驱动电路与第二散热器隔离设置，进一步地完成充电模块充电模块控制器及充电模块PWM隔离驱动电路与大功率发热器件的热隔离，进一步地提高充电机的IP防护等级，特别是，提高系统恶劣环境下的使用寿 命。In the embodiment of the present invention, the charging module controller and the charging module PWM isolation driving circuit in the DC charging module are packaged in the second heat conducting housing, the charging module controller and the charging module PWM isolation driving circuit in the DC charging module and the first The two heat sink isolation settings further complete the thermal isolation of the charging module charging module controller and the charging module PWM isolation driving circuit and the high-power heating device, thereby further improving the IP protection level of the charging device, in particular, improving the harsh environment of the system. Use life Life.
进一步地，上述直流充电模块中的开关管Q21、Q22、Q23、Q24均可采用IGBT器件或SIC功率模块。Further, the switching tubes Q21, Q22, Q23, and Q24 in the DC charging module may be IGBT devices or SIC power modules.
在本发明实施例中，本发明中的开关管均采用绝缘栅双极型晶体管IGBT，或者是，碳化硅SIC功率模块替代传统直流充电电源模块中使用的场效应管(MOSFET)，碳化硅SIC功率模块具有低损耗、高效率、耐工作高温特点；绝缘栅双极型晶体管IGBT(Insulated Gate Bipolar Transistor)，绝缘栅双极型晶体管，是由BJT(双极型三极管)和MOS(绝缘栅型场效应管)组成的复合全控型电压驱动式功率半导体器件,兼有MOSFET的高输入阻抗和GTR的低导通压降两方面的优点。GTR饱和压降低，载流密度大，但驱动电流较大；MOSFET驱动功率很小，开关管速度快，但导通压降大，载流密度小。IGBT综合了以上两种器件的优点，驱动功率小而饱和压降低。在室温条件下，其集电极发射电压可达1200V，平均前向电流为600A，容许的最大直流电流为750A，因此该晶体管具备承受高电压大电流的能力。相同正向导通电流下，使用场效应MOS管的数量是绝缘栅双极型晶体管I GBT的近13倍；与以往电路比较，PFC电路中使用场效应管的数量是绝缘栅双极型晶体管的39倍；LLC全桥谐振电路33中使用场效应管的数量是绝缘栅双极型晶体管的26倍。故通过绝缘栅双极型晶体管(I GBT)替代传统直流充电电源模块中使用的场效应管(MOSFET)，不仅减少了直流充电模块中元件使用还能承载更大的输出功率。In the embodiment of the present invention, the switch tube of the present invention uses an insulated gate bipolar transistor IGBT, or a silicon carbide SIC power module replaces a field effect transistor (MOSFET) used in a conventional DC charging power supply module, and a silicon carbide SIC. The power module has low loss, high efficiency and high temperature resistance; insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor), insulated gate bipolar transistor, which is made of BJT (bipolar transistor) and MOS (insulated gate type) The field-effect transistor consists of a composite fully-regulated voltage-driven power semiconductor device that combines the advantages of high input impedance of the MOSFET and low on-voltage drop of the GTR. The GTR saturation voltage is reduced, the current carrying density is large, but the driving current is large; the MOSFET driving power is small, the switching tube speed is fast, but the conduction voltage drop is large, and the current carrying density is small. The IGBT combines the advantages of the above two devices, with low driving power and reduced saturation voltage. At room temperature, the collector emission voltage can reach 1200V, the average forward current is 600A, and the maximum allowable DC current is 750A. Therefore, the transistor has the ability to withstand high voltage and large current. Under the same forward conduction current, the number of field effect MOS transistors is nearly 13 times that of the insulated gate bipolar transistor I GBT; compared with the previous circuit, the number of field effect transistors used in the PFC circuit is the insulated gate bipolar transistor. 39 times; the number of field effect transistors used in the LLC full bridge resonant circuit 33 is 26 times that of the insulated gate bipolar transistor. Therefore, replacing the field effect transistor (MOSFET) used in the conventional DC charging power supply module by the insulated gate bipolar transistor (I GBT) not only reduces the component usage in the DC charging module but also carries a larger output power.
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。 The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural transformations made by the present invention and the contents of the drawings, or directly/indirectly The relevant technical fields are all included in the scope of patent protection of the present invention.

Claims (10)

  1. 一种基于高压直流配电的电动车充电站，其特征在于，包括高压断路器、高压直流变换装置和充电机，其中：An electric vehicle charging station based on high voltage direct current power distribution, characterized in that it comprises a high voltage circuit breaker, a high voltage direct current converter and a charger, wherein:
    三相高压输入电压通过高压断路器与高压直流变换装置连接，高压直流变换装置将三相高压输入交流电变换为直流电供电至充电机。The three-phase high-voltage input voltage is connected to the high-voltage DC converter through a high-voltage circuit breaker, and the high-voltage DC converter converts the three-phase high-voltage input AC into a DC power supply to the charger.
  2. 如权利要求1所述的基于高压直流配电的电动车充电站，其特征在于，上述高压直流变换装置输入电压范围为0.4Kv～4Kv三相交流电。The electric vehicle charging station based on high voltage direct current power distribution according to claim 1, wherein said high voltage direct current converter has an input voltage range of 0.4 kv to 4 kv three-phase alternating current.
  3. 如权利要求2所述的基于高压直流配电的电动车充电站，其特征在于，上述高压直流变换装置包括有配电交流输入EMI滤波电路、配电工频整流电路、配电功率因素校正电路、配电LLC全桥逆变电路、配电高频变压器、配电高频整流电路、配电防倒灌直流输出电路、配电PWM隔离驱动控制电路、配电控制器，其中配电交流输入EMI滤波电路的输入端与高压断路器的输出端连接，配电工频整流电路的输入端与交流输入EMI滤波电路的输出端连接，配电工频整流电路的输出端与配电功率因素校正电路的输入端连接，配电功率因素校正电路的输出端与配电LLC全桥逆变电路的输入端连接，配电高频变压器的输入线圈与配电LLC全桥逆变电路的输出端连接，配电高频变压器的输出线圈与配电高频整流电路的输入端连接，配电高频整流电路的输出端通过配电防倒灌直流输出电路与充电机的输入端连接，配电控制器通过配电PWM隔离驱动控制电路与配电功率因素校正电路及配电LLC全桥逆变电路连接，配电高频整流电路的输出端通过配电PWM隔离驱动控制电路与配电控制器连接。The electric vehicle charging station based on high voltage DC power distribution according to claim 2, wherein said high voltage DC converter comprises a power distribution AC input EMI filter circuit, an electrical frequency rectification circuit, and a power distribution factor correction circuit. , distribution LLC full-bridge inverter circuit, distribution high-frequency transformer, distribution high-frequency rectifier circuit, power distribution anti-backflow DC output circuit, power distribution PWM isolation drive control circuit, power distribution controller, among which power distribution AC input EMI The input end of the filter circuit is connected to the output end of the high voltage circuit breaker, and the input end of the electric frequency rectification circuit is connected with the output end of the AC input EMI filter circuit, and the output end of the electric frequency rectification circuit and the power distribution factor correction circuit are provided. The input end is connected, the output end of the power distribution factor correction circuit is connected to the input end of the power distribution LLC full-bridge inverter circuit, and the input coil of the power distribution high-frequency transformer is connected to the output end of the power distribution LLC full-bridge inverter circuit. The output coil of the distribution high-frequency transformer is connected to the input end of the distribution high-frequency rectifier circuit, and the output end of the distribution high-frequency rectifier circuit is discharged through the power distribution anti-backflow DC output The circuit is connected to the input end of the charger, and the power distribution controller is connected to the power distribution factor correction circuit and the power distribution LLC full-bridge inverter circuit through the power distribution PWM isolation drive control circuit, and the output end of the power distribution high-frequency rectifier circuit is matched. The electric PWM isolated drive control circuit is connected to the power distribution controller.
  4. 如权利要求1所述的基于高压直流配电的电动车充电站，其特征在 于，上述配电工频整流电路包括有由二极管D1、D2、D3、D4、D5、D6组成的桥式整流电路；上述配电功率因素校正电路包括有开关管Q5，电容C1、C2，二极管D7，变压器T1，电感L1，其中Q5的门极与高压直流变换PWM隔离驱动控制电路连接，Q5的集电极与二极管D7的阳极连接及与电感L1的一端连接，Q5的发射极与变压器T1的初级线圈连接，变压器T1的次级线圈与高压直流变换PWM隔离驱动控制电路连接，变压器T1的初级线圈还与电容C1、C2的一端连接，电容C1的另一端与电感L1的另一端连接，C2的另一端与二极管D7的阴极连接；上述配电LLC全桥逆变电路包括有四个开关管及其外围电路，开关管分别是Q1、Q2、Q3、Q4,其中Q1的门极、Q2的门极、Q3的门极、Q4的门极都与配电PWM隔离驱动控制电路连接，Q1的发射极、Q2的集电极、Q3的发射极、Q4的集电极都与配电高频变压器T2的初级线圈连接，Q1的集电极及Q3的集电极与与二极管D7的阴极连接，Q2的发射极及Q4的发射极都与与变压器T1的初级线圈连接，配电高频整流电路包括有由二极管D9、D10、D11、D12组成的桥式整流电路；配电防倒灌直流输出电路包括有二极管D8，二极管D8的阳极与由二极管D9、D10、D11、D12组成的桥式整流电路的输出端连接，二极管D8的阴极与充电机的输入端连接。The electric vehicle charging station based on high voltage DC power distribution according to claim 1, characterized in that The above-mentioned electrical frequency rectification circuit includes a bridge rectifier circuit composed of diodes D1, D2, D3, D4, D5, and D6; the power distribution factor correction circuit includes a switch tube Q5, capacitors C1, C2, and a diode. D7, transformer T1, inductor L1, wherein the gate of Q5 is connected with the high voltage DC conversion PWM isolation drive control circuit, the collector of Q5 is connected with the anode of diode D7 and is connected with one end of inductor L1, the emitter of Q5 and the transformer T1 The primary coil is connected, the secondary coil of the transformer T1 is connected to the high voltage DC conversion PWM isolation drive control circuit, the primary coil of the transformer T1 is also connected to one end of the capacitors C1 and C2, and the other end of the capacitor C1 is connected to the other end of the inductor L1, C2 The other end is connected to the cathode of the diode D7; the above-mentioned power distribution LLC full-bridge inverter circuit includes four switch tubes and peripheral circuits thereof, and the switch tubes are Q1, Q2, Q3, and Q4, respectively, wherein the gate of Q1 and Q2 are The gate, the gate of Q3, and the gate of Q4 are all connected to the power distribution PWM isolation drive control circuit. The emitter of Q1, the collector of Q2, the emitter of Q3, and the collector of Q4 are all connected to the high-frequency transformer T2. Primary line The ring is connected, the collector of Q1 and the collector of Q3 are connected to the cathode of diode D7, the emitter of Q2 and the emitter of Q4 are connected to the primary coil of transformer T1, and the distribution high frequency rectifier circuit includes diode D9. a bridge rectifier circuit composed of D10, D11, and D12; the power distribution anti-backflow DC output circuit includes a diode D8, and an anode of the diode D8 is connected to an output end of a bridge rectifier circuit composed of diodes D9, D10, D11, and D12. The cathode of diode D8 is coupled to the input of the charger.
  5. 如权利要求4所述的基于高压直流配电的电动车充电站，其特征在于，上述配电工频整流电路中的二极管D1、D2、D3、D4、D5、D6是功率器件；配电功率因素校正电路中的二极管D7及开关管Q5是功率器件；配电LLC全桥逆变电路中的IGBT器件Q1、Q2、Q3、Q4是功率器件；配电高频整流电路中的二极管D9、D10、D11、D12是功率器件；配电防倒灌直流输出电路中的二极管D8是功率器件；上述功率器件安装在第一散热器上；第一散热器采用风冷和/或液冷散热器；高压直流变换装置的配电控制器和配 电PWM隔离驱动电路封装在第一导热壳体内，高压直流变换装置的配电控制器及配电PWM隔离驱动电路，与第一散热器隔离设置。The electric vehicle charging station based on high voltage direct current power distribution according to claim 4, wherein the diodes D1, D2, D3, D4, D5, and D6 in the electric power frequency rectifying circuit are power devices; The diode D7 and the switch tube Q5 in the factor correction circuit are power devices; the IGBT devices Q1, Q2, Q3, and Q4 in the power distribution LLC full-bridge inverter circuit are power devices; the diodes D9 and D10 in the power distribution high-frequency rectifier circuit , D11, D12 are power devices; the diode D8 in the power distribution anti-backflow DC output circuit is a power device; the above power device is mounted on the first heat sink; the first heat sink is air-cooled and/or liquid-cooled heat sink; Distribution controller and distribution of DC converter The electric PWM isolation driving circuit is packaged in the first heat conduction housing, and the power distribution controller of the high voltage DC conversion device and the power distribution PWM isolation driving circuit are disposed separately from the first heat sink.
  6. 根据权利要求1至5任一项所述的基于高压直流配电的电动车充电站，其特征在于上述充电机输入电压为0.8Kv～1Kv直流电压，包括有直流断路器、直流充电模块、非车载直流充电机控制器、开关K，其中直流充电模块的输入端与直流断路器的输出端连接，直流充电模块的输出端与开关K连接，且开关K和直流断路器的通断由非车载直流充电机控制器控制。The electric vehicle charging station based on high voltage DC power distribution according to any one of claims 1 to 5, characterized in that the input voltage of the charger is 0.8Kv to 1Kv DC voltage, including a DC circuit breaker, a DC charging module, and a non- The vehicle DC charger controller and the switch K, wherein the input end of the DC charging module is connected to the output end of the DC circuit breaker, the output end of the DC charging module is connected to the switch K, and the switching of the switch K and the DC circuit breaker is off-board. DC charger controller control.
  7. 根据权利要求6所述的基于高压直流配电的电动车充电站，其特征在于上述充电机中的直流充电模块包括有直流输入EMI滤波电路、充电模块LLC全桥逆变电路、充电模块高频变压器、充电模块高频整流电路、充电模块防倒灌直流输出电路、充电模块PWM隔离驱动控制电路、充电模块控制器，其中直流输入EMI滤波电路的输入端与高压直流变换装置的输出端连接，充电模块LLC全桥逆变电路的输入端与直流输入EMI滤波电路的输出端连接，充电模块LLC全桥逆变电路的输出端与充电模块高频变压器的初级线圈连接，充电模块高频变压器的次级线圈与充电模块高频整流电路的输入端连接，充电模块高频整流电路的输出端与直流充电防倒灌直流输出电路的输入端连接，充电模块防倒灌直流输出电路的输出端与充电汽车连接，充电模块控制器通过充电模块PWM隔离驱动控制电路驱动充电模块LLC全桥逆变电路的开关管，充电模块高频整流电路的输出电压、电流还通过充电模块PWM隔离驱动控制电路采样给充电模块控制器。The electric vehicle charging station based on high voltage DC power distribution according to claim 6, wherein the DC charging module in the charging machine comprises a DC input EMI filter circuit, a charging module LLC full bridge inverter circuit, and a charging module high frequency. Transformer, charging module high-frequency rectification circuit, charging module anti-backflow DC output circuit, charging module PWM isolation drive control circuit, charging module controller, wherein the input end of the DC input EMI filter circuit is connected with the output end of the high-voltage DC converter, charging The input end of the module LLC full-bridge inverter circuit is connected with the output end of the DC input EMI filter circuit, the output end of the charging module LLC full-bridge inverter circuit is connected with the primary coil of the charging module high-frequency transformer, and the charging module high-frequency transformer is used. The level coil is connected to the input end of the high frequency rectifying circuit of the charging module, and the output end of the high frequency rectifying circuit of the charging module is connected with the input end of the DC charging anti-backflow DC output circuit, and the output end of the charging module anti-backflow DC output circuit is connected with the charging car. , the charging module controller is controlled by the charging module PWM isolation drive The circuit drives the charging module of the LLC full-bridge inverter circuit, and the output voltage and current of the charging module high-frequency rectifier circuit are also sampled by the charging module PWM isolation drive control circuit to the charging module controller.
  8. 根据权利要求7所述的基于高压直流配电的电动车充电站，其特征在于上述直流充电模块中的充电模块LLC全桥逆变电路包括四个开关管及 其外围电路，四个开关管分别是Q21、Q22、Q23、Q24，Q21的门极、Q22的门极、Q23的门极、Q24的门极都与高压直流变换PWM隔离驱动控制电路连接，Q21的发射极、Q22的集电极、Q23的发射极、Q24的集电极都与高压直流变换高频变压器T22的初级线圈连接，Q21的集电极及Q23的集电极与与铝电解电容C22的正端连接，Q22的发射极及Q24的发射极都与铝电解电容C22的负端连接，充电模块高频整流电路包括有由二极管D29、D30、D31、D32组成的桥式整流电路；充电模块防倒灌直流输出电路包括有二极管D28，二极管D28的阳极与由二极管D29、D30、D31、D32组成的桥式整流电路的输出端正端连接，二极管D8的阴极与电动车的输入端连接。The electric vehicle charging station based on high voltage DC power distribution according to claim 7, wherein the charging module LLC full bridge inverter circuit in the DC charging module comprises four switching tubes and The peripheral circuit, the four switching tubes are Q21, Q22, Q23, Q24, the gate of Q21, the gate of Q22, the gate of Q23, the gate of Q24 are all connected with the high voltage DC conversion PWM isolation drive control circuit, Q21 The emitter, the collector of Q22, the emitter of Q23, and the collector of Q24 are all connected to the primary coil of high-voltage DC-transformed high-frequency transformer T22, the collector of Q21 and the collector of Q23 and the positive terminal of aluminum electrolytic capacitor C22 Connection, the emitter of Q22 and the emitter of Q24 are connected to the negative end of aluminum electrolytic capacitor C22. The high-frequency rectifier circuit of charging module includes bridge rectifier circuit composed of diodes D29, D30, D31, D32; charging module anti-backflow The DC output circuit includes a diode D28. The anode of the diode D28 is connected to the positive end of the bridge rectifier circuit composed of the diodes D29, D30, D31, and D32, and the cathode of the diode D8 is connected to the input end of the electric vehicle.
  9. 根据权利要求8所述的基于高压直流配电的电动车充电站，其特征在于上述充电机的充电模块LLC全桥逆变电路的四个开关管Q21、Q22、Q23、Q24是功率器件；充电模块高频整流电路中的二极管D29、D30、D31、D32是功率器件；充电模块防倒灌直流输出电路中的二极管D28是功率器件；上述功率器件安装在第二散热器上；第二散热器是风冷和/或液冷散热器；直流充电模块中的充电模块控制器和充电模块PWM隔离驱动电路封装在第二导热壳体内，直流充电模块中的充电模块控制器及充电模块PWM隔离驱动电路与第二散热器隔离设置。The electric vehicle charging station based on high voltage DC power distribution according to claim 8, wherein the four switching tubes Q21, Q22, Q23 and Q24 of the charging module LLC full-bridge inverter circuit of the charging device are power devices; The diodes D29, D30, D31, D32 in the module high-frequency rectifier circuit are power devices; the diode D28 in the charging module anti-backflow DC output circuit is a power device; the above power device is mounted on the second heat sink; the second heat sink is Air-cooled and/or liquid-cooled heat sink; charging module controller and charging module PWM isolation driving circuit in DC charging module are packaged in the second heat-conducting housing, charging module controller and charging module PWM isolation driving circuit in DC charging module Isolate from the second heat sink.
  10. 根据权利要求9所述的基于高压直流配电的电动车充电站，其特征在于，上述直流充电模块中的开关管Q21、Q22、Q23、Q24均可采用IGBT器件或SIC功率模块。 The electric vehicle charging station based on high voltage DC power distribution according to claim 9, wherein the switching tubes Q21, Q22, Q23, and Q24 in the DC charging module can adopt an IGBT device or an SIC power module.
PCT/CN2017/093646 2017-06-02 2017-07-20 High voltage direct current power distribution-based electric vehicle charging station WO2018218754A1 (en)

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