CN208272652U - The electric motorcar charging station of low cost DC distribution - Google Patents
The electric motorcar charging station of low cost DC distribution Download PDFInfo
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- CN208272652U CN208272652U CN201721137889.3U CN201721137889U CN208272652U CN 208272652 U CN208272652 U CN 208272652U CN 201721137889 U CN201721137889 U CN 201721137889U CN 208272652 U CN208272652 U CN 208272652U
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- charging module
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
The utility model discloses a kind of electric motorcar charging station of low cost DC distribution, it include high-voltage circuitbreaker, phase-shifting transformer, current rectifying and wave filtering circuit, DC power distribution line and charger, wherein three-phase high-voltage input AC electricity is connect by high-voltage circuitbreaker with phase-shifting transformer, three-phase high-voltage input AC electricity is transformed to three-phase low-voltage alternating current by phase-shifting transformer, is sent by DC power distribution line to charger after the rectified filter circuit rectifying and wave-filtering of three-phase alternating current.Three-phase high-voltage input AC electricity is transformed to powered by direct current to charger by phase-shifting transformer isolation, decompression and current rectifying and wave filtering circuit by the utility model, and simplify DC charging module design, improve the power density of DC charging module, charger stability is promoted, the construction cost of charging station is reduced.The utility model is a kind of ingenious in design, function admirable, the electric motorcar charging station of convenient and practical low cost DC distribution.
Description
Technical field
The utility model relates to charging station technical field, in particular to the electric vehicle of a kind of low cost DC distribution charges
It stands.
Background technique
With popularizing for electric car, high-power charging equipment applies more and more, high-power electric vehicle charging station
More and more, traditional high-power charging station device structure is complicated, and element is various, and low efficiency, energy consumption is high, and repair rate is high, construction
It is at high cost, take up a large area, and high-power electric vehicle charging station need to input it is high-power, it is necessary in the input terminal of charging station
In addition it installs high voltage transformer cabinet additional, and cannot directly access the Three-phase five-wire 380VAC alternating current arranged originally, and traditional height
The isolating transformer case of the cabinet bodies such as voltage breaker+high voltage transformer cabinet+harmonic wave cabinet composition, and by including multiple respective outfits
The DC charging station of the DC charging motor composition of PFC rectification circuit DC charging module, it is bulky, it is expensive.It is badly in need of prominent
Break a kind of inexpensive, highly reliable high-power charging station technology.
Utility model content
The purpose of this utility model is to provide a kind of electric motorcar charging station of low cost DC distribution, the utility model is low
This low, high reliablity, power are big.
To achieve the above object, the utility model proposes a kind of low cost DC distribution electric motorcar charging station, including
There are high-voltage circuitbreaker, phase-shifting transformer, current rectifying and wave filtering circuit, DC power distribution line and charger, wherein three-phase high-voltage input is handed over
Galvanic electricity is connect by high-voltage circuitbreaker with phase-shifting transformer, and it is low that three-phase high-voltage input AC electricity is transformed to three-phase by phase-shifting transformer
Alternating current is pressed, is sent by DC power distribution line to charger after the rectified filter circuit rectifying and wave-filtering of three-phase alternating current.
The utility model compared with prior art, has the following technical effect that
1) input voltage range of the utility model phase-shifting transformer is 3KV~10KV three-phase alternating voltage, phase shift transformation
Device substantially eliminates the biggish low-order harmonic of amplitude by carrying out phase shift to rectifier transformer high-pressure side；Phase-shifting transformer
It exports after rectified filtering as DC voltage, supply voltage of the DC voltage of output as charger in charging station solves
The rectification of three-phase alternating current input voltage and Active PFC to input；
2) the utility model realizes the isolation, decompression and Active PFC of high input voltage using phase-shifting transformer,
It is of simple structure and low cost without additionally adding reactive power compensator, harmonic suppression apparatus；
3) the utility model uses DC distribution, and because DC distribution does not have phase and generator rotor angle, stable problem is not present, as long as
Voltage drop, the technical indicators such as network loss meet the requirements, so that it may achieve the purpose that transmission, without considering stable problem；As long as output electricity
Pressure is consistent, DC distribution do not need substantially processing can series, parallel, expand output power；And DC distribution material cost
It is lower than the ac transmission of three-phase and four-line, it is thus only necessary to the 1/3 or lower of ac transmission.
4) the DC charging module of the utility model charger changes traditional three-phase and four-line 380VAC AC distribution mode,
Simplify DC charging module EMC Requirements and design, removal rectification and Active PFC；Key switch element uses
IGBT(insulated gate bipolar transistor) or SiC power module substitution Traditional DC charging power modules used in field-effect tube
(MOSFET), simplify LLC full-bridge resonant circuit structure；DC charging module power density greatly increases, and transfer efficiency is higher, directly
The design of current charge machine is more flexible；
5) the utility model high-power components are mounted on high-power components radiator；High-power components radiator is air-cooled
Or liquid cooling heat radiator；It is only necessary to high-power components radiator heat-dissipation；
6) the utility model weak control circuit is encapsulated in the shell with good heat radiating, with high-power heater element every
Heat；The IP degree of protection of charger is improved, the service life under system adverse circumstances is improved.
The utility model is a kind of ingenious in design, function admirable, and the electric vehicle of convenient and practical low cost DC distribution fills
Power station.
Detailed description of the invention
Fig. 1 is a kind of functional block diagram of the electric motorcar charging station of low cost DC distribution of the utility model；
Fig. 2 is the functional block diagram of current rectifying and wave filtering circuit in the utility model；
Fig. 3 is the functional block diagram of charger in the utility model；
Fig. 4 is the functional block diagram of DC charging module in the utility model charger；
Fig. 5 is the circuit diagram of DC charging module in the utility model charger.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig.1-5, the utility model proposes a kind of low cost DC distribution electric motorcar charging station, include high pressure
Breaker, phase-shifting transformer, current rectifying and wave filtering circuit, DC power distribution line and charger, wherein three-phase high-voltage input AC electricity is logical
It crosses high-voltage circuitbreaker to connect with phase-shifting transformer, three-phase high-voltage input AC electricity is transformed to three-phase low-voltage and exchanged by phase-shifting transformer
Electricity is sent to charger by DC power distribution line after the rectified filter circuit rectifying and wave-filtering of three-phase alternating current.
Above-mentioned high-voltage circuitbreaker input voltage range is 3KV~10KV three-phase alternating current.In the present embodiment, the utility model
Phase-shifting transformer is directly entered through high-voltage circuitbreaker by power grid high pressure, then by easily realizing that direct current is defeated after full-bridge rectifier filter
Out, it is delivered to off-board electric car DC charging motor.
In the present embodiment, above-mentioned phase-shifting transformer is DC voltage phase-shifting transformer, and DC voltage phase-shifting transformer passes through
Phase shift is carried out to rectifier transformer high-pressure side, substantially eliminates the biggish low-order harmonic of amplitude.
The utility model directly transports direct current after passing through processing of circuit, supplies power to charger.Direct current transportation has as follows
Feature: 1) direct current transportation does not have phase and generator rotor angle, stable problem is not present, as long as voltage drop, the technical indicators such as network loss are conformed to
It asks, so that it may achieve the purpose that transmission, without considering stable problem；As long as 2) output voltage is consistent, direct current transportation does not need substantially
Processing can series, parallel, expand output power；3) direct current transportation material cost is lower than the ac transmission of Three-phase five-wire, only
Only need the 1/3 or lower of ac transmission.
Above-mentioned phase-shifting transformer input voltage range is 3KV~10KV three-phase alternating current, and output 0.8KV~1KV direct current is matched
Electricity, power supply of the DC distribution of output as charger in charging station.
Above-mentioned current rectifying and wave filtering circuit includes the bridge rectifier filter circuit being made of diode D11~D22, C4, wherein
The output-parallel of two 6 impulse commutation bridges of D11~D16 and D17~D22, and it is in parallel with filter capacitor C4, export stable direct current
Voltage is sent by DC power distribution line to charger.
It is power device that above-mentioned current rectifying and wave filtering circuit, which includes by diode D11~D22,；Above-mentioned power device is mounted on
On one radiator；First radiator uses air-cooled or liquid cooling heat radiator.
In the present embodiment, as long as the radiator heat-dissipation for designing power loading device is good, it can improve and match well
The IP degree of protection of electric part extends the service life under service life of equipment, especially raising system adverse circumstances.
Above-mentioned charger input voltage is 0.8KV~1KV DC voltage, and above-mentioned charger includes direct current input open circuit
Device, direct current output breaker, DC charging module, off-board DC charging machine controller and attachment device, wherein direct current inputs
The input terminal of breaker and the output end of current rectifying and wave filtering circuit connect, and the input terminal and direct current of DC charging module input breaker
Output end connection, the output end of DC charging module connect with the input terminal of direct current output breaker, direct current output breaker
Output end connect with attachment device, attachment device is connect with electric car, and direct current input breaker, direct current output breaker
On-off controlled by off-board DC charging machine controller.The input voltage of above-mentioned direct current input breaker is 0.8KV~1KV.
In the present embodiment, the utility model in charger by being arranged breaker, DC charging module, off-board straight
Current charge machine controller, breaker and attachment device control DC output voltage, with charging voltage needed for exporting electric vehicle.
In the present embodiment, the DC charging module in above-mentioned charger includes direct current input EMI filter circuit, charging mould
Block LLC full bridge inverter, charging module high frequency transformer, charging module high-frequency rectification circuit, charging module reverse-filling direct current
Output circuit, DC charging module controller, wherein direct current inputs the input terminal and high voltage direct current converting means of EMI filter circuit
Output end connection, the output end of the input terminal of charging module LLC full bridge inverter and direct current input EMI filter circuit connects
It connects, the output end of charging module LLC full bridge inverter is connect with the primary coil of charging module high frequency transformer, charging module
The secondary coil of high frequency transformer is connect with the input terminal of charging module high-frequency rectification circuit, charging module high-frequency rectification circuit
Output end is connect with the input terminal of DC charging reverse-filling DC output circuit, charging module reverse-filling DC output circuit it is defeated
Outlet is connect with Rechargeable vehicle, and DC charging module controller drives the switching tube of charging module LLC full bridge inverter.
In the present embodiment, the utility model will input charger by the conversion of the DC charging module in charger
DC charging voltage of the DC power conversion to suitable electric vehicle demand.Charging module LLC full bridge inverter is in charging module
Voltage transformation part circuit, be, using high frequency transformer voltage of transformation, finally to rectify the straight of output after being reverse into exchange
The voltage of galvanic electricity is charging voltage needed for electric vehicle.
Charging module LLC full bridge inverter in above-mentioned DC charging module includes four switching tubes and its periphery electricity
Road, four switching tubes are Q1, Q2, Q3, Q4 respectively, the gate pole of Q1, the gate pole of switching tube Q2, switching tube Q3 gate pole, switching tube
The gate pole of Q4 is all connect with DC charging module controller, the emitter of switching tube Q1, the collector of switching tube Q2, switching tube Q3
Emitter, switching tube Q4 collector all with high voltage direct current transformation high frequency transformer T2 primary coil connect, switching tube Q1
Collector and the collector of switching tube Q3 connect with the anode of electrolytic capacitor C2, the emitter of switching tube Q2 and the emitter of Q4
It is all connect with the negative terminal of electrolytic capacitor C2, in the present embodiment, electrolytic capacitor C2 is alminium electrolytic condenser.Charging module high-frequency rectification electricity
Road includes the bridge rectifier being made of diode D9, D10, D11, D12；Charging module reverse-filling DC output circuit packet
Diode D8, the anode of diode D8 and the output end by diode D9, D10, D11, D12 bridge rectifier formed are included
Anode connection, the cathode of diode D8 and the input terminal of electric vehicle connect.Charging module LLC full bridge inverter passes through above-mentioned electricity
Road connection relationship completes the transformation task of power transfer and voltage.
In the present embodiment, four switching tubes Q1, Q2, Q3, Q4 of the charging module LLC full bridge inverter of above-mentioned charger
It is power device；Diode D9, D10, D11, D12 in charging module high-frequency rectification circuit are power devices；Charging module is anti-
The diode D8 flowed backward in DC output circuit is power device；Above-mentioned power device is mounted on the second radiator；Second dissipates
Hot device is air-cooled and/or liquid cooling heat radiator；DC charging module controller in DC charging module is encapsulated in the second thermally conductive shell
In vivo, setting is isolated with the second radiator in the DC charging module controller in DC charging module.
In the present embodiment, the utility model passes through the high-power fever electronic device of charging module LLC full bridge inverter,
Switching tube, high-speed rectifier diode, reverse-filling rectifier diode including LLC full-bridge resonance circuit are mounted on dedicated large volume
It radiates on radiator；Radiator is radiated by the air-cooled or liquid cooling that charger is equipped with.Compared with traditional charging module, pass
The higher active air cooling formula DC charging module of the 15KW power density of system uses 2 small DC fans, and the heat dissipation of module is complete
Dependent on DC fan, the service life of blower directly determines the service life of module.But DC fan physique is smaller, it is interior
The part in portion is fragile, is easily damaged, and heat dissipation effect is bad, under the operating mode of active air cooling, temperature, dust, humidity, oil
All kinds of factors of dirt, mildew, salt fog, chemical substance etc. are serious to damage DC fan service life；Traditional DC charging
The topological structure of module has been used a large amount of using no bridge Vienna rectification circuit and based on the LLC resonance circuit of three level
Powerful output is realized in field-effect tube parallel connection, and structure is complicated, and element is too many, increase cost；Traditional 15KW power is close
It spends in higher DC charging module, big capacitance capacitor is all the alminium electrolytic condenser for having used electrolyte type, single DC charging
Module is fully loaded with about 18 DEG C of temperature rise when output, partially close to 30 DEG C of the electrolysis temperature rise > of inside modules radiator, high temperature hostile ring
Border by it is serious influence alminium electrolytic condenser service life.In this way, the utility model only needs to radiate to radiator, structure
Simply, and there is splendid heat dissipation effect.
In the utility model embodiment, by by low-voltage control circuit (such as the DC charging in DC charging module
Module controller) it is encapsulated in the second heat conduction shell, setting is isolated with the second radiator in low-voltage control circuit, further completes
Earth pres-sure control circuit is thermally isolated with high-power heating device, further improves the IP degree of protection of charger, especially mentions
Service life under high system adverse circumstances.
IGBT device or SIC power module can be used in switching tube Q1, Q2, Q3, Q4 in above-mentioned DC charging module.
In the present embodiment, the switching tube in the utility model is all made of insulated gate bipolar transistor IGBT, or with silicon carbide SiC
Power module substitutes field-effect tube (MOSFET) used in Traditional DC charging power modules, silicon carbide SiC power module tool
There are low-loss, high efficiency, the high temperature of resistance to work feature；Insulated gate bipolar transistor IGBT (Insulated Gate Bipolar
Transistor), insulated gate bipolar transistor is by BJT (double pole triode) and MOS (insulating gate type field effect tube) group
At compound full-control type voltage driven type power semiconductor, have the high input impedance of MOSFET and the low conducting pressure of GTR concurrently
Advantage of both drop.GTR saturation pressure reduces, and current carrying density is big, but driving current is larger；MOSFET driving power very little, is opened
It is fast to close pipe speed, but conduction voltage drop is big, current carrying density is small.IGBT combines the advantages of both the above device, driving power it is small and
Saturation pressure reduces.At room temperature, for collector emitting voltage up to 1200V, average forward current is 600A, is allowed most
Big DC current is 750A, therefore the transistor has the ability for bearing high-voltage large current.Under identical forward conduction electric current, make
Quantity with field-effect metal-oxide-semiconductor is nearly 13 times of insulated gate bipolar transistor IGBT；Compared with previous circuit, in pfc circuit
Quantity using field-effect tube is 39 times of insulated gate bipolar transistor；Field-effect tube is used in LLC full-bridge resonance circuit 33
Quantity be 26 times of insulated gate bipolar transistor.Therefore Traditional DC is substituted by insulated gate bipolar transistor (IGBT) and is filled
Field-effect tube used in power supply module (MOSFET), not only reducing element use in DC charging module can also carry more
Big output power.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Under the utility model design of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of electric motorcar charging station of low cost DC distribution, it is characterised in that include high-voltage circuitbreaker, phase-shifting transformer,
Current rectifying and wave filtering circuit, DC power distribution line and charger, wherein three-phase high-voltage input AC electricity passes through high-voltage circuitbreaker and phase shift
Three-phase high-voltage input AC electricity is transformed to three-phase low-voltage alternating current by transformer connection, phase-shifting transformer, and three-phase alternating current is through whole
It is sent by DC power distribution line to charger after stream filter circuit rectifying and wave-filtering.
2. the electric motorcar charging station of low cost DC distribution according to claim 1, it is characterised in that above-mentioned high pressure open circuit
Device input voltage range is 3KV~10KV three-phase alternating current.
3. the electric motorcar charging station of low cost DC distribution according to claim 1, it is characterised in that above-mentioned rectifying and wave-filtering
Circuit includes the bridge rectifier filter circuit being made of diode D11~D22 and capacitor C4, wherein D11~D16 and D17~
The output-parallel of two 6 impulse commutation bridges of D22, and it is in parallel with filter capacitor C4, steady dc voltage is exported, is matched by direct current
Electric line is sent to charger.
4. the electric motorcar charging station of low cost DC distribution according to claim 3, it is characterised in that above-mentioned diode D11
~D22 is power device；Above-mentioned power device is mounted on the first radiator；First radiator uses air-cooled or liquid-cooling heat radiation
Device.
5. the electric motorcar charging station of low cost DC distribution according to any one of claims 1 to 4, it is characterised in that above-mentioned
Charger includes direct current input breaker, direct current output breaker, DC charging module, off-board DC charging machine controller
And attachment device, wherein the input terminal of direct current input breaker and the output end of current rectifying and wave filtering circuit connect, DC charging module
The output end of input terminal and direct current input breaker connect, the output end of DC charging module is defeated with direct current output breaker
Enter end connection, the output end of direct current output breaker is connect with attachment device, and attachment device is connect with electric car, and direct current is defeated
Enter breaker, the on-off of direct current output breaker is controlled by off-board DC charging machine controller.
6. the electric motorcar charging station of low cost DC distribution according to claim 5, it is characterised in that above-mentioned direct current input
The input voltage of breaker is 0.8KV~1KV.
7. the electric motorcar charging station of low cost DC distribution according to claim 5, it is characterised in that in above-mentioned charger
DC charging module include direct current input EMI filter circuit, charging module LLC full bridge inverter, charging module high frequency
Transformer, charging module high-frequency rectification circuit, charging module reverse-filling DC output circuit, DC charging module controller,
The input terminal of middle direct current input EMI filter circuit is connect with the output end of high voltage direct current converting means, and charging module LLC full-bridge is inverse
The input terminal on power transformation road is connect with the output end of direct current input EMI filter circuit, the output of charging module LLC full bridge inverter
End is connect with the primary coil of charging module high frequency transformer, and the secondary coil and charging module of charging module high frequency transformer are high
The input terminal of frequency rectification circuit connects, output end and DC charging reverse-filling the direct current output electricity of charging module high-frequency rectification circuit
The input terminal on road connects, and the output end of charging module reverse-filling DC output circuit is connect with Rechargeable vehicle, DC charging module
The switching tube of controller driving charging module LLC full bridge inverter.
8. the electric motorcar charging station of low cost DC distribution according to claim 7, it is characterised in that above-mentioned DC charging
Charging module LLC full bridge inverter in module includes four switching tubes and its peripheral circuit, four switching tubes be respectively Q1,
Q2, Q3, Q4, the gate pole of Q1, the gate pole of switching tube Q2, the gate pole of switching tube Q3, switching tube Q4 gate pole all with DC charging mould
Block controller connection, the emitter of switching tube Q1, the collector of switching tube Q2, the emitter of switching tube Q3, switching tube Q4 collection
Electrode is all connect with the primary coil of high voltage direct current transformation high frequency transformer T2, the collector of switching tube Q1 and the collection of switching tube Q3
Electrode is connect with the anode of electrolytic capacitor C2, and the emitter of switching tube Q2 and the emitter of Q4 all connect with the negative terminal of electrolytic capacitor C2
It connects, charging module high-frequency rectification circuit includes the bridge rectifier being made of diode D9, D10, D11, D12；Charge mould
Block reverse-filling DC output circuit includes diode D8, and the anode of diode D8 is formed with by diode D9, D10, D11, D12
Bridge rectifier the connection of output end anode, the input terminal of the cathode of diode D8 and electric vehicle connects.
9. the electric motorcar charging station of low cost DC distribution according to claim 8, it is characterised in that above-mentioned charger
Four switching tubes Q1, Q2, Q3, Q4 of charging module LLC full bridge inverter are power devices；Charging module high-frequency rectification circuit
In diode D9, D10, D11, D12 be power device；Diode D8 in charging module reverse-filling DC output circuit is function
Rate device；Above-mentioned power device is mounted on the second radiator；Second radiator is air-cooled and/or liquid cooling heat radiator；Direct current fills
DC charging module controller in electric module is encapsulated in the second heat conduction shell, the DC charging module in DC charging module
Setting is isolated with the second radiator in controller.
10. the electric motorcar charging station of low cost DC distribution according to claim 9, it is characterised in that above-mentioned DC charging
Switching tube Q1, Q2, Q3, Q4 in module are all made of IGBT device or SIC power module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721137889.3U CN208272652U (en) | 2017-09-06 | 2017-09-06 | The electric motorcar charging station of low cost DC distribution |
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|---|---|---|---|
| CN201721137889.3U CN208272652U (en) | 2017-09-06 | 2017-09-06 | The electric motorcar charging station of low cost DC distribution |
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| CN208272652U true CN208272652U (en) | 2018-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465230A (en) * | 2017-09-06 | 2017-12-12 | 广东万城万充电动车运营股份有限公司 | A kind of electric motorcar charging station of low cost DC distribution |
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2017
- 2017-09-06 CN CN201721137889.3U patent/CN208272652U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465230A (en) * | 2017-09-06 | 2017-12-12 | 广东万城万充电动车运营股份有限公司 | A kind of electric motorcar charging station of low cost DC distribution |
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Effective date of registration: 20210621 Address after: 510000 201, building 25, No.38, Nanbian Road, Haizhu District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU WANCHENG WANCHONG NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: 510220 the courtyard 38, south side road, Haizhuqu District, Guangzhou, Guangdong, has 25 2 stories. Patentee before: GUANGDONG WANCHENG WANCHONG ELECTRIC VEHICLE OPERATION Co.,Ltd. |