CN207612109U - A kind of numerical-control direct-current charging pile - Google Patents
A kind of numerical-control direct-current charging pile Download PDFInfo
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- CN207612109U CN207612109U CN201721464101.XU CN201721464101U CN207612109U CN 207612109 U CN207612109 U CN 207612109U CN 201721464101 U CN201721464101 U CN 201721464101U CN 207612109 U CN207612109 U CN 207612109U
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- 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
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Abstract
The utility model provides a kind of numerical-control direct-current charging pile, including isolated form full-bridge topology unit, RCD absorptive units, detection and protection location, MCU units, driving unit and communication unit.The utility model uses isolated form full-bridge topology and digital phase shifted control, with rated output power is big, work efficiency is high, output voltage range is wide and the characteristics such as continuously adjustable, it can realize " three-stage " charge mode of constant current, constant pressure and floating charge, it is equipped with communication port simultaneously, with communication and human-computer interaction function, there is good application prospect in DC charging occasion.
Description
Technical field
The utility model is related to electric vehicle charge control technical field, more particularly to a kind of numerical-control direct-current charging pile.
Background technology
With global industry, the process of urbanization, automobile as the product after the secondary industrial revolution from invention application with
During being constantly in sustainable growth.Consuming excessively for petroleum resources is led in a large amount of discharges of conventional fuel oil vehicle exhaust
The problems such as having caused energy crisis, climate warming and city haze (PM2.5).
Electric vehicle is to replace the vehicles of fuel engines using electric power as power source with motor, can not only be real
Existing zero-emission, low noise and pollution-free, and can largely save the petroleum-based energy of increasingly depleted.Electric vehicle is continuous in recent years
Interim development is achieved in terms of its energy-storage system and dynamical system, good low-carbon environment-friendly characteristic meets people
Class low-carbon, low energy consumption green demand, be future automobile technology development main direction.Therefore it is dedicated to ev industry elder generation
Into the research and development of technology, to accelerate the paces of the ev industry marketization, make energy-saving and environmental protection and efficient electric vehicle early at
For the vehicles of the convenient trip of human comfort, it has also become the trend developed instantly.
The application of electric vehicle, firstly the need of improved and complete charging infrastructure service facility, is electric vehicle energy with popularization
The guarantee of source supply, has a decisive role the development of electric vehicle industry.Electric vehicle mainly has conventional friendship at present
Current charge, direct current quick charge, wireless charging and the common electric energy supply mode of 4 kinds of more preferable battery pack.Direct current charge mode gram
Electric energy pipeline time long problem has been taken, can realize high power DC fast charge, to effectively opening up long electric vehicle stroke, promoting
Electric vehicle is promoted has far reaching significance with development, therefore the research of direct-current charging post technology in recent years receives always pass with optimization
Note.
Utility model content
(1) the technical issues of solving
To solve the above-mentioned problems, the utility model provides a kind of numerical-control direct-current charging pile, with rated output work(
The characteristics such as rate is big, work efficiency is high, output voltage is continuously adjustable can realize " three-stage " charging mould of constant current, constant pressure and floating charge
Formula, while it being equipped with communication port, there is communication and human-computer interaction function.
(2) technical solution
A kind of numerical-control direct-current charging pile, including isolated form full-bridge topology unit, RCD absorptive units, detection and protection location,
MCU units, driving unit and communication unit；
DC650V DC power supplies access the isolated form full-bridge topology unit, after rectified transformation, export 300~500V
Continuously adjustable D/C voltage is separately connected the RCD absorptive units and the detection and protection location；
The RCD absorptive units inhibit the concussion peak voltage that the isolated form full-bridge topology unit generates, and export to vehicle
Cell load charging is carried, while exporting the connection detection and protection location；
The detection is detected and under-voltage guarantor the input voltage of the isolated form full-bridge topology unit with protection location
Shield, to the on-vehicle battery load input voltage and electric current sample respectively and provide overvoltage and overcurrent protection, it is described detection with
The output signal of protection location is sent into the MCU units；
The MCU units carry out A/D conversions to the detection and the output signal of protection location, and the drive is generated after processing
The pwm control signal of moving cell, the MCU units output are separately connected the driving unit and the communication unit；
The driving unit is connected with the isolated form full-bridge topology unit, and output drive signal gives the isolated form full-bridge
The device for power switching of topology unit；
The MCU units are connect by the communication unit with vehicle-mounted RS485 bus communications, and identify the on-vehicle battery
The characteristic of load.
Further, the isolated form full-bridge topology unit includes high frequency inverter circuit, high frequency transformer circuit and complete
Bridge rectification circuit；The high frequency inverter circuit includes the first~the 4th power switch tube；The high frequency transformer circuit includes
High frequency transformer, the first capacitance and the first inductance；The full bridge rectifier include the first~the 4th diode, the second capacitance and
Second inductance.
Further, the RCD absorptive units include the 5th diode, third inductance, first resistor, the third and fourth electricity
Hold.
Further, the detection and protection location include voltage sample and overvoltage crowbar, current detection circuit and
Multichannel inputs or gate logic protects circuit；The voltage sample and overvoltage crowbar include the first and second operational amplifiers,
5th capacitance and the second~the 4th resistance, wherein first and second operational amplifier selects OP07Z；The current detecting electricity
Road includes the capacitance of current sensor, the 6th and the 7th, wherein the current sensor selects the Hall current sensor with isolation
ACS712ELCRT-30A-T；The multichannel input or gate logic protection circuit include triode, the 5th~the 7th resistance, the 8th
With the 9th capacitance.
Further, the MCU units select microcontroller DSPIC33FJ32GS606.
Further, the driving unit selects binary channels high-voltage high-speed voltage-type device for power switching gate drivers
2ED020I12-F。
Further, the communication unit is RS485 interface circuits, including electrical level transferring chip, connector, first and the
The resistance of two light emitting diodes, the 8th and the 9th, wherein the electrical level transferring chip selects MAX485.
(3) advantageous effect
The utility model provides a kind of numerical-control direct-current charging pile, using isolated form full-bridge topology and digital phase shifted control,
With rated output power is big, work efficiency is high, output voltage range is wide and the characteristics such as continuously adjustable, constant current, constant pressure can be realized
With " three-stage " charge mode of floating charge, while be equipped with communication port, have communication and human-computer interaction function, in DC charging field
Closing has good application prospect.
Description of the drawings
Fig. 1 is a kind of system structure diagram of numerical-control direct-current charging pile involved by the utility model.
Fig. 2 is a kind of isolated form full-bridge topology element circuit principle of numerical-control direct-current charging pile involved by the utility model
Figure.
Fig. 3 is a kind of RCD absorptive unit circuit diagrams of numerical-control direct-current charging pile involved by the utility model.
Fig. 4 is the voltage sample and overvoltage crowbar principle of a kind of numerical-control direct-current charging pile involved by the utility model
Figure.
Fig. 5 is a kind of current detection circuit schematic diagram of numerical-control direct-current charging pile involved by the utility model.
Fig. 6 is that a kind of multichannel input of numerical-control direct-current charging pile involved by the utility model or gate logic protect circuit former
Reason figure.
Fig. 7 is a kind of communication unit circuit diagram of numerical-control direct-current charging pile involved by the utility model.
Specific implementation mode
The embodiment involved by the utility model is described in further details below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of numerical-control direct-current charging pile, including isolated form full-bridge topology unit, RCD absorptive units, detection
With protection location, MCU units, driving unit and communication unit；DC650V DC power supplies access isolated form full-bridge topology unit, warp
After rectifier transformer, it is single with protection to be separately connected RCD absorptive units and detection for D/C voltage continuously adjustable 300~500V of output
Member；RCD absorptive units inhibit the concussion peak voltage that isolated form full-bridge topology unit generates, output to be filled to on-vehicle battery load
Electricity, while exporting connecting detection and protection location；Detection and protection location to the input voltage of isolated form full-bridge topology unit into
Row detection and under-voltage protection sample and provide overvoltage and overcurrent protection respectively to the input voltage and electric current of on-vehicle battery load,
Detection and the output signal of protection location are sent into MCU units；MCU units carry out A/D to detecting with the output signal of protection location
Conversion, generates the pwm control signal of driving unit after processing, the output of MCU units is separately connected driving unit and communication unit；It drives
Moving cell is connected with isolated form full-bridge topology unit, power switch device of the output drive signal to isolated form full-bridge topology unit
Part；MCU units are connect by communication unit with vehicle-mounted RS485 bus communications, and identify the characteristic of on-vehicle battery load.
DC650V is obtained from grid side after single-phase or three phase rectifier and PFC (PFC) processing.
It has been studied extensively for the charge control strategy of accumulator, it is negative that complete " three-stage " charging can be directed to different batteries
The characteristic of load is switched to different charge modes stage by stage：It charges the incipient stage, such as detects cell voltage less than first with reference to electricity
Pressure, it is without damage in charging process for protection battery at this time, instantaneous charge current should be prevented excessive, select constant-current charge mould
Formula, in this mode charging current remain unchanged, voltage slowly rises；Wait for that constant-current charge for a period of time, such as detects electricity at this time
Cell voltage has risen to the second reference voltage, and charge mode is transformed into constant-voltage charge by constant current, and charging voltage is kept under the pattern
Constant, charging current is gradually reduced；Constant-voltage charge certain time when such as detecting that charging current has been less than reference current, shows
Accumulator has been filled substantially with, and battery is damaged to prevent from overcharging for a long time, is transferred to floating charge pattern until charging finishes, in floating charge mould
Charging voltage is only slightly higher than accumulator rated voltage under formula, which helps to alleviate the polarity effect in battery charging process.
This direct-current charging post charges to the on-vehicle battery load of electric vehicle using " three-stage " charging modes.
Theoretically the power conversion capability of high power converter is directly proportional to the switching tube quantity for participating in power conversion.Direct current
Charging pile is generally operational in high-power occasion, therefore uses isolated form full-bridge topology.As shown in Fig. 2, isolated form full-bridge is opened up
It includes high frequency inverter circuit, high frequency transformer circuit and full bridge rectifier to flutter unit；High frequency inverter circuit includes power
Switching tube VT1~VT4；High frequency transformer circuit includes high frequency transformer T1, capacitance C1 and inductance L1；Full bridge rectifier includes
Diode D1~D4, capacitance C2 and inductance L2.Input side DC650V by full-bridge inverting 4 power switch tube VT1~VT4 inversions
At flowing through high frequency transformer T1 after ac square wave, then by 4 diode D1~D4, to high frequency transformer T1 secondary sides square wave into
Row full-bridge rectification and output LC filtering, realize buck DC-DC transformation.Capacitance C1 is capacitance, for preventing high frequency transformation
The direct current biasing of the device T1 courses of work and cause magnetic saturation.Inductance L1 is resonant inductance, the leakage inductance of cooperation high frequency transformer T1 itself
To improve the condition for postponing arm in full-bridge topology and realizing ZVS (no-voltage) Sofe Switch.Switching tube (VT1, VT3 above and below same bridge arm
With VT2, VT4) complementary conducting and there are certain dead time, it prevents straight-through in handoff procedure bridge arm and short trouble occurs；
Two switching tubes (VT1, VT4 and VT2, VT3) on same pair of horns are staggered certain angle (phase shifting angle) under phase shifting control
It is open-minded simultaneously afterwards.High frequency transformer T1 primary sides voltage and primary side current positive and negative alternating and inclined without direct current in one cycle
It sets.
In high power D C-DC converters, rectifier diode easy tos produce concussion peak voltage during Reverse recovery,
Peak can reach 2 times of output voltage, if do not inhibited easily to cause permanent damage to rectifier diode, therefore be isolated
Type full-bridge topology unit output end adds passive RCD peak absorbing circuits.As shown in figure 3, RCD absorptive units include diode
D5, inductance L3, resistance R1, capacitance C3 and C4.The absorbing circuit is simple, is not necessarily to complicated control circuit, and the energy absorbed in circuit
Amount part can be exported by resistance R1 to be loaded to on-vehicle battery, is effectively improved transfer efficiency.Work as rectifier bridge output voltage
When Urect generates spike concussion during Reverse recovery, diode D5 anode voltages be apparently higher than the voltage at the both ends capacitance C3 and
Forward conduction, peak voltage are risen by capacitance C3 clampers, during this period capacitance C3 both end voltages；When the concussion of rectifier outlet side disappears
Clamp diode D5 reversely ends after mistake, and capacitance C3 both end voltages are declined by being changed to rising.In whole work process, capacitance
The electric energy that C1 is absorbed is formed into a loop and is discharged with output end by resistance R1, and resistance R1 also will while consuming portion of energy
Amount passes to on-vehicle battery load, charges to on-vehicle battery load.
In charging process, the input voltage to isolated form full-bridge topology unit is needed to be detected and under-voltage protection, it is right
The input voltage and electric current of on-vehicle battery load sample and provide overvoltage and overcurrent protection respectively.Detection includes electricity with protection location
Pressure sampling and overvoltage crowbar, current detection circuit and multichannel input or gate logic protect circuit.As shown in figure 4, voltage is adopted
Sample and overvoltage crowbar include operational amplifier U2 and U3, capacitance C5 and resistance R2~R4, wherein operational amplifier U2 and U3
Select OP07Z.The input voltage of isolated form full-bridge topology unit is carried out sampling to obtain Uin, operation electricity is amplified by proportional integration
The AD sampling ends that Uin1 is sent into MCU units are exported behind road, while Uin1 is further relatively rear more defeated with comparison circuit benchmark Uref
Go out logic level Uin2, the input signal of circuit is protected as multichannel input or gate logic, as Uin1 ＞ Uref, Uin2 is height
Level is by trigger protection.As shown in figure 5, current detection circuit includes current sensor U4, capacitance C6 and C7, wherein current sense
Device U4 selects the Hall current sensor ACS712ELCRT-30A-T with isolation.The input current I1 of on-vehicle battery load is from U4
IP1+ and IP2+ feet flow into after through IP1- and IP2- pins flow out electric current I2, the integrated amplifications of output current sampled signal Iout
It is exported afterwards to the AD sampling ends of MCU units, while also protecting the input signal of circuit as multichannel input or gate logic.Such as Fig. 6
Shown, multichannel input or gate logic protection circuit include triode Q1, resistance R5~R7, capacitance C8 and C9.Multichannel inputs or door
The input signal of virtual protection circuit be each sample circuit protection signal, the Enable Pin of output end EN connection driving units, when
When to have input signal be high level, triode Q1 conducting, output end EN will be pulled low as low level by high level VCC to be latched
The Enable Pin of driving unit plays the role of quickly protecting.
MCU units select microcontroller DSPIC33FJ32GS606, are 16 bit digital signal processors, and operating voltage 3.0~
3.6V, wide temperature range -40~+125 DEG C, the up to channels high speed PWM of 9 tunnel independence timing, 10 high-speed ADCs and 10 high speeds
DAC, 2 High Speed UARTs, 2 SPI, CAN2.0 controllers, 2 I2C etc., peripheral interface are very abundant.Detection and protection location
The signal of sampling is input to inside microcontroller after the A/D conversions of ADC sampling ends and is handled, generates corresponding pwm control signal
Control driving unit.Before driving unit carries out power output, microcontroller by communication unit and vehicle mounted battery management system into
Row communicates and identifies the characteristic of on-vehicle battery load, then makes corresponding charging strategy, is driven by digital phase shifted control
Moving cell works.
Good driver should have the characteristics such as strong antijamming capability and error protection, to the stabilization of power switch tube work
Property and safety have vital effect.Driving unit selects binary channels high-voltage high-speed voltage-type device for power switching grid
Driver 2ED020I12-F.The pwm control signal that microcontroller generates, which exports, gives driver U1, in the case where driving is enabled,
Each power switch tube work of the amplified driving bridge arm of pwm control signal.2ED020I12-F carries internal logic and protects circuit,
When same bridge arm two-way drive signal input simultaneously be high level when by automatic blocking driver U1, to prevent bridge arm direct pass.It drives
Dynamic device U1 also carries a general-purpose operation amplifier and a comparator, can be used for the overcurrent protection of bridge arm.In combination with driving
The device U1 under-voltage protection functions of itself have good security protection feature.
Direct-current charging post first has to the characteristic of identification cell load and for not before starting to on-vehicle battery load charging
Corresponding charging strategy is made with cell load.Different charge modes are selected to need to complete by communication unit.Such as Fig. 7 institutes
Show, communication unit be RS485 interface circuits, including electrical level transferring chip U5, connector J1, Light-emitting diode LED 1 and LED2,
Resistance R8 and R9.Microcontroller and on-vehicle battery load are communicated by RS485 buses, therefore the serial ports input of microcontroller/defeated
Go out to need just be connected in RS485 buses after MAX485 carries out level conversion, sampling rate is controlled by microcontroller.Direct current fills
Electric stake selects RS485 to be communicated, and has the characteristics that interface is simple, networking is convenient, long transmission distance.Microcontroller passes through MAX485
It is communicated with vehicle mounted battery management system, the characteristic loaded by communication handshake protocol identification on-vehicle battery.Microcontroller passes through simultaneously
MAX485 can also be communicated with other external equipment of expanding, and realize friendly human-computer interaction function.
The utility model provides a kind of numerical-control direct-current charging pile, using isolated form full-bridge topology and digital phase shifted control,
With rated output power is big, work efficiency is high, output voltage range is wide and the characteristics such as continuously adjustable, constant current, constant pressure can be realized
With " three-stage " charge mode of floating charge, while be equipped with communication port, have communication and human-computer interaction function, in DC charging field
Closing has good application prospect.
Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality
Novel conception and scope is defined.Without departing from the design concept of the present utility model, ordinary people in the field couple
The all variations and modifications that the technical solution of the utility model is made, should fall within the protection scope of the present utility model, this reality
With novel claimed technology contents, all record in detail in the claims.
Claims (7)
1. a kind of numerical-control direct-current charging pile, it is characterised in that：Including isolated form full-bridge topology unit, RCD absorptive units, detection with
Protection location, MCU units, driving unit and communication unit；
DC650V DC power supplies access the isolated form full-bridge topology unit, and after rectified transformation, 300~500V of output is continuous
Adjustable D/C voltage is separately connected the RCD absorptive units and the detection and protection location；
The RCD absorptive units inhibit the concussion peak voltage that the isolated form full-bridge topology unit generates, and export to vehicle mounted electric
Pond load charging, while exporting the connection detection and protection location；
The detection is detected to the input voltage of the isolated form full-bridge topology unit with protection location and under-voltage protection, right
The input voltage and electric current of the on-vehicle battery load sample and provide overvoltage and overcurrent protection respectively, and the detection and protection are single
The output signal of member is sent into the MCU units；
The MCU units carry out A/D conversions to the detection and the output signal of protection location, and it is single that the driving is generated after processing
The pwm control signal of member, the MCU units output are separately connected the driving unit and the communication unit；
The driving unit is connected with the isolated form full-bridge topology unit, and output drive signal gives the isolated form full-bridge topology
The device for power switching of unit；
The MCU units are connect by the communication unit with vehicle-mounted RS485 bus communications, and identify the on-vehicle battery load
Characteristic.
2. a kind of numerical-control direct-current charging pile according to claim 1, it is characterised in that：The isolated form full-bridge topology unit
Including high frequency inverter circuit, high frequency transformer circuit and full bridge rectifier；The high frequency inverter circuit include first~
4th power switch tube；The high frequency transformer circuit includes high frequency transformer, the first capacitance and the first inductance；The full-bridge is whole
Current circuit includes the first~the 4th diode, the second capacitance and the second inductance.
3. a kind of numerical-control direct-current charging pile according to claim 1, it is characterised in that：The RCD absorptive units include the
Five diodes, third inductance, first resistor, the third and fourth capacitance.
4. a kind of numerical-control direct-current charging pile according to claim 1, it is characterised in that：The detection with protection location includes
Voltage sample and overvoltage crowbar, current detection circuit and multichannel input or gate logic protect circuit；The voltage sample and
Overvoltage crowbar includes the first and second operational amplifiers, the 5th capacitance and the second~the 4th resistance, wherein first He
Second operational amplifier selects OP07Z；The current detection circuit includes the capacitance of current sensor, the 6th and the 7th, wherein institute
It states current sensor and selects the Hall current sensor ACS712ELCRT-30A-T with isolation；The multichannel input or gate logic
Protection circuit includes triode, the 5th~the 7th resistance, the 8th and the 9th capacitance.
5. a kind of numerical-control direct-current charging pile according to claim 1, it is characterised in that：The MCU units select microcontroller
DSPIC33FJ32GS606。
6. a kind of numerical-control direct-current charging pile according to claim 1, it is characterised in that：The driving unit selects binary channels
High-voltage high-speed voltage-type device for power switching gate drivers 2ED020I12-F.
7. a kind of numerical-control direct-current charging pile according to claim 1, it is characterised in that：The communication unit connects for RS485
Mouthful circuit, including electrical level transferring chip, connector, the first and second light emitting diodes, the 8th and the 9th resistance, wherein the electricity
Flat conversion chip selects MAX485.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721464101.XU CN207612109U (en) | 2017-11-06 | 2017-11-06 | A kind of numerical-control direct-current charging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721464101.XU CN207612109U (en) | 2017-11-06 | 2017-11-06 | A kind of numerical-control direct-current charging pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207612109U true CN207612109U (en) | 2018-07-13 |
Family
ID=62794915
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721464101.XU Expired - Fee Related CN207612109U (en) | 2017-11-06 | 2017-11-06 | A kind of numerical-control direct-current charging pile |
Country Status (1)
| Country | Link |
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| CN (1) | CN207612109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062741A (en) * | 2021-10-29 | 2022-02-18 | 威胜信息技术股份有限公司 | Square wave envelope type micro-topology signal generation system and method |
-
2017
- 2017-11-06 CN CN201721464101.XU patent/CN207612109U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114062741A (en) * | 2021-10-29 | 2022-02-18 | 威胜信息技术股份有限公司 | Square wave envelope type micro-topology signal generation system and method |
| CN114062741B (en) * | 2021-10-29 | 2023-02-21 | 威胜信息技术股份有限公司 | Square wave envelope type micro-topology signal generation system and method |
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