CN108718106A - A kind of wireless charging system for electric vehicle - Google Patents
A kind of wireless charging system for electric vehicle Download PDFInfo
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- CN108718106A CN108718106A CN201810670207.8A CN201810670207A CN108718106A CN 108718106 A CN108718106 A CN 108718106A CN 201810670207 A CN201810670207 A CN 201810670207A CN 108718106 A CN108718106 A CN 108718106A
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- 238000004146 energy storage Methods 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H02J7/025—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H02J7/042—
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- H02J7/045—
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H02J2007/10—
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of wireless charging systems for electric vehicle, sequentially connected first rectifier bridge of primary side, first order pressure regulator, intermediate capacitance, second level pressure regulator, inverter, primary side reactive-load compensator, primary side transmitter, and secondary receiver while sequentially connected secondary, secondary side reactive-load compensator, the second rectifier bridge are specifically included；Further include primary controller and secondary controller；The wireless charging system provided by the invention can be operated in higher transimission power, and can ensure that primary side full-bridge inverter is operated in the state that no-voltage is opened, and the efficiency of transmission of the wireless charging system is greatly improved by adjusting.
Description
Technical field
The present invention relates to power technique fields, especially a kind of wireless charging system for electric vehicle.
Background technology
With the propulsion of China's energy-saving and emission-reduction policy, new energy vehicle is widely applied, especially electric vehicle, is adopted
With electric drive, exhaust emission is not generated, is the vital measure of energy-saving and emission-reduction in terms of realizing communications and transportation.Electric vehicle electricity at present
The arbitrary way of pond energy substantially has three classes：The first kind is wired charging modes, using charging socket, charging gun, charging pile
Equal charging equipments are that the battery of electric vehicle charges；Second class is wireless charging mode, uses wireless charging system for electric vehicle
Battery charging；Third class is the battery pack of the battery replacing electric vehicle directly using electricity abundance.
The arbitrary way of current most widely used electric vehicle battery energy is wired charging modes, is especially applied
In centralized parking lot charging station, electric vehicle concentration is parked in parking lot in parking stall, and parking lot staff artificially connects
The charging head of charging equipment (such as is connected to electric vehicle to be charged by the charging circuit connect between electric vehicle and charging equipment
On) to realize that the energy supplement to charging vehicle battery still needs to expend a large amount of manpower object using such charging modes
Power and time cost.
But use wireless charging system to charge for the battery of electric vehicle, since the type of automobile is various, the storage in automobile
The input voltage of energy battery and acceptable input power are different；Therefore it needs to provide a kind of to automobile variety classes battery
Compatibility preferably and the problem of can also be urgent need to resolve with the wireless charging system of sufficiently high charge efficiency.
Invention content
In view of the above-mentioned problems, the present invention is intended to provide a kind of wireless charging system for electric vehicle, it is intended to determine electricity
Electrical automobile condition of acceptance allow under maximum transmission power and improve automobile wireless charging system efficiency of transmission.
The purpose of the present invention is realized using following technical scheme：
Provide a kind of wireless charging system for electric vehicle, include positioned at pile body side the first rectifier bridge, first
Grade pressure regulator, second level pressure regulator are connected in parallel on intermediate capacitance, inversion between first order pressure regulator and second level pressure regulator port
Device, primary side reactive-load compensator, primary side transmitter, for driving the first of first order pressure regulator and second level voltage regulator operation to drive
Module, the second drive module for driving inverter work, the primary side communicated for the secondary side communicator with vehicle-mounted end
Communicator and primary controller；Further include positioned at vehicle-mounted side it is secondary in receiver, it is secondary while reactive-load compensator, the second rectifier bridge,
For the unloaded or low open-circuit-protection relay for carrying protection, the secondary side communication communicated for the primary side communicator with pile body side
Device and secondary controller；
Wherein, the primary controller controls the first order pressure regulation and the second level pressure regulation exports rectifier bridge
Direct current carries out voltage and is adjusted to target voltage；DC inverter after carrying out overvoltage adjusting is become exchange by the inverter
After the alternating current is using primary side reactive-load compensator, transmission is received by primary side transmitter transmitting, secondary side receiver for electricity
To secondary side reactive-load compensator；The secondary controller, control second rectifier bridge by AC rectification at direct current after, output
To the energy-storage battery of automobile；
The secondary controller also is used for obtaining the required reception power of energy-storage battery, and generates maximum vehicle-mounted acceptable work(
The information of rate gives secondary side communicator, is emitted into primary controller by secondary side communicator, primary controller includes power threshold list
Member, the power threshold unit calculate the maximum transmitted work(that transmits of the system in the case where second level pressure regulator does not access
Maximum vehicle-mounted acceptable power is compared by rate with the maximum transmission power of system, if the maximum transmission power of system meets
The vehicle-mounted vehicle-mounted acceptable power of maximum, then primary controller, which continues to control second pressure regulator, does not work；If it is not, then controlling
Second pressure regulator, which works, is adjusted the input voltage of inverter.
Preferably, the first input end of first rectifier bridge and the second input terminal connect alternating current, and described first is whole
The first output end and second output terminal for flowing bridge are inputted with the first input end of the first order pressure regulator and second respectively
End connection；The first output end and second output terminal of the first order pressure regulator respectively with the second level pressure regulator first
Input terminal and the connection of the second input terminal；First output end of one end connection first order pressure regulator of the intermediate capacitance, it is another
The second output terminal of end connection first order pressure regulator；The first output end and second output terminal of the second level pressure regulator are distinguished
It is connect with the first input end of inverter and the second input terminal；The first output end and second output terminal of the inverter point
It is not connect with the first input end of the primary side reactive-load compensator and the second input terminal；The first of the primary side reactive-load compensator
Output end and second output terminal are connect with the first input end of the primary side transmitter and the second input terminal respectively；
The pair side receiver is connect with the primary side transmitter by electromagnetic coupling, and the first of pair side receiver is defeated
Outlet and second output terminal are connect with the first input end of the secondary side reactive-load compensator and the second input terminal respectively；It is described
The first output end and second output terminal of secondary side reactive-load compensator respectively with the first input end of second rectifier bridge and
Second input terminal connects；The first output end and second output terminal of second rectifier bridge respectively with the positive and negative anodes of energy-storage battery
Connection；
The primary controller of the pile body side respectively with the controlled end of first drive module, second drive module
Controlled end and by-pass switch module controlled end connection, first drive module respectively drives the first order pressure regulator
And second pressure regulator carry out working condition adjusting；Second drive module is used for generating trigger signal driving inverter work
Make；The control terminal of the secondary controller of the vehicle-mounted side respectively with the controlled end of the open-circuit-protection relay and the second rectification
The controlled end of bridge is attached.
Preferably, the first order pressure regulator is buck-boost type DC/DC converters；The second level pressure regulator is with four
The Boost converter of item interleaved PFC circuit topological structure.
Preferably, the wireless charging system further includes battery manager, the output end of the battery manager and secondary side
The input terminal of controller connects；The first input end of the battery manager and the second input terminal respectively with the second rectifier bridge
One output end and second output terminal connection.
Preferably, the wireless charging system further includes by-pass switch module, wherein the secondary controller monitors battery
The shutdown output request that manager is sent out, and shutdown output request signal is sent to primary-side-control by secondary side communicator
Second level pressure regulation is bypassed, is used within the shortest time by device, the primary controller control by-pass switch module work
The input voltage of inverter is reduced, and then rapidly reduces the output power of wireless charging system.
Preferably, the primary controller includes for sampling monitoring voltage, current signal with the secondary controller
Sampling monitoring module and control module, be electrically connected between the sampling monitoring device and control module.
Preferably, the power threshold unit computing system transmitting in the case where second level pressure regulator does not access
The calculation formula of maximum transmission power is：
In formula, w0For the setting resonant frequency of wireless charging system；L1For the inductance of the resonant inductance inside primary side transmitter
Value；L2For the inductance value of the resonant inductance inside secondary side receiver；Lf1To compensate the inductance value of inductance in primary side reactive-load compensator；
Lf2To compensate the inductance value of inductance in secondary side reactive-load compensator；M is the mutual inductance impact factor between resonant inductance and compensation inductance；
K is the coefficient of coup between the resonant inductance inside primary side transmitter and the resonant inductance inside the receiver of secondary side；VABmaxFor only
Using the maximum input voltage of primary side reactive-load compensator input terminal when first order pressure regulator pressure regulation；VoutFor vehicle-mounted side energy-storage battery
Request input voltage.
Beneficial effects of the present invention are：The present invention is by being arranged the first rectifier bridge, first order pressure regulator, intermediate capacitance, the
Second voltage regulation device, inverter, primary side reactive-load compensator, primary side transmitter, primary controller, secondary benefit idle in receiver, pair
Device, the second rectifier bridge and secondary controller are repaid, a kind of wireless charging system for electric vehicle is formd；Primary controller is logical
The acquisition to the request input voltage and maximum vehicle-mounted acceptable power of energy-storage battery is crossed, and then by power threshold unit to institute
The maximum transmission power for stating wireless charging system is calculated, the maximum transmission power and maximum vehicle-mounted acceptable work(
Rate controls the second voltage regulator operation by control module, increases inverse if maximum transmission power is less than maximum vehicle-mounted acceptable power
Become the input voltage of device, and then increase the maximum transmission power of the wireless charging system, to meet the maximum of vehicle-mounted side battery
Receive power, realization system is transmitted in the case where on-vehicle battery condition of acceptance allows with larger transimission power.
Description of the drawings
Using attached drawing, the invention will be further described, but the embodiment in attached drawing does not constitute any limit to the present invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the functional block diagram of the wireless charging system in a preferred embodiment of the present invention；
Fig. 2 is primary side reactive-load compensator in a preferred embodiment of the invention, primary side transmitter and secondary side receiver, pair
Electrical block diagram inside the compensator of side.
Specific implementation mode
In conjunction with following application scenarios, the invention will be further described.
The description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as instruction or
It implies its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result,
Feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can phase
It mutually combines, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution occurs mutually
Contradiction or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection domain it
It is interior.
The present invention proposes a kind of wireless charging system for electric vehicle, is carried out for the energy-storage battery to electric vehicle
Efficient charging.
Referring to Fig. 1, in the present embodiment, the wireless charging system for electric vehicle includes positioned at the of pile body side
One rectifier bridge, second level pressure regulator, is connected in parallel between first order pressure regulator and the second level pressure regulator port first order pressure regulator
Between capacitance, inverter, primary side reactive-load compensator, primary side transmitter, for driving first order pressure regulator and second level pressure regulator work
Make the first drive module, for drive inverter work the second drive module, for the secondary side communicator with vehicle-mounted end into
The primary side communicator and primary controller of row communication；Further include positioned at vehicle-mounted side it is secondary in receiver, it is secondary while reactive-load compensator,
Second rectifier bridge is led to for the unloaded or low open-circuit-protection relay for carrying protection, for the primary side communicator with pile body side
The secondary side communicator and secondary controller of letter；
Wherein, the primary controller controls the first order pressure regulation and the second level pressure regulation exports rectifier bridge
Direct current carries out voltage and is adjusted to target voltage；DC inverter after carrying out overvoltage adjusting is become exchange by the inverter
After the alternating current is using primary side reactive-load compensator, transmission is received by primary side transmitter transmitting, secondary side receiver for electricity
To secondary side reactive-load compensator；The secondary controller, control second rectifier bridge by AC rectification at direct current after, output
To the energy-storage battery of automobile；
The secondary controller also is used for obtaining the required reception power of energy-storage battery, and generates maximum vehicle-mounted acceptable work(
The information of rate gives secondary side communicator, is emitted into primary controller by secondary side communicator, primary controller includes power threshold list
Member, the power threshold unit calculate the maximum transmitted work(that transmits of the system in the case where second level pressure regulator does not access
Maximum vehicle-mounted acceptable power is compared by rate with the maximum transmission power of system, if the maximum transmission power of system meets
The vehicle-mounted vehicle-mounted acceptable power of maximum, then primary controller, which continues to control second pressure regulator, does not work；If it is not, then controlling
Second pressure regulator, which works, is adjusted the input voltage of inverter.
In the present embodiment, power threshold unit computing system the passing in the case where second level pressure regulator does not access
Defeated maximum transmission power PMAXCalculation formula be：
In formula, w0For the setting resonant frequency of wireless charging system；L1For the inductance of the resonant inductance inside primary side transmitter
Value；L2For the inductance value of the resonant inductance inside secondary side receiver；Lf1To compensate the inductance value of inductance in primary side reactive-load compensator；
Lf2To compensate the inductance value of inductance in secondary side reactive-load compensator；M is the mutual inductance impact factor between resonant inductance and compensation inductance；
K is the coefficient of coup between the resonant inductance inside primary side transmitter and the resonant inductance inside the receiver of secondary side；VABmaxFor only
Using the maximum input voltage of primary side reactive-load compensator input terminal when first order pressure regulator pressure regulation；VoutFor vehicle-mounted side energy-storage battery
Request input voltage.
Technical solution of the present invention is by being provided with the first rectifier bridge, first order pressure regulator, intermediate capacitance, second level pressure regulation
Device, inverter, primary side reactive-load compensator, primary side transmitter, primary controller, secondary reactive-load compensator, second in receiver, pair
Rectifier bridge and secondary controller form a kind of wireless charging system for electric vehicle；Primary controller passes through to energy storage
The acquisition of the request input voltage of battery and maximum vehicle-mounted acceptable power, and then by power threshold unit to the wireless charging
The maximum transmission power of electric system is calculated, the maximum transmission power and maximum vehicle-mounted acceptable power, if maximum
Transimission power is less than maximum vehicle-mounted acceptable power, then controls the second voltage regulator operation by control module, increase the defeated of inverter
Entering voltage, and then increases the maximum transmission power of the wireless charging system, the maximum to meet vehicle-mounted side battery receives power,
Realization system is transmitted in the case where on-vehicle battery condition of acceptance allows with larger transimission power.
In the present embodiment, the first input end of first rectifier bridge and the second input terminal connect alternating current, and described the
The first output end and second output terminal of one the rectifier bridge first input end and second with the first order pressure regulator respectively
Input terminal connects；The first output end and second output terminal of the first order pressure regulator respectively with the second level pressure regulator
First input end and the connection of the second input terminal；First output end of one end connection first order pressure regulator of the intermediate capacitance,
The other end connects the second output terminal of first order pressure regulator；The first output end and second output terminal of the second level pressure regulator
It is connect respectively with the first input end of inverter and the second input terminal；First output end of the inverter and the second output
End is connect with the first input end of the primary side reactive-load compensator and the second input terminal respectively；The primary side reactive-load compensator
First output end and second output terminal are connect with the first input end of the primary side transmitter and the second input terminal respectively；
The pair side receiver is connect with the primary side transmitter by electromagnetic coupling, and the first of pair side receiver is defeated
Outlet and second output terminal are connect with the first input end of the secondary side reactive-load compensator and the second input terminal respectively；It is described
The first output end and second output terminal of secondary side reactive-load compensator respectively with the first input end of second rectifier bridge and
Second input terminal connects；The first output end and second output terminal of second rectifier bridge respectively with the positive and negative anodes of energy-storage battery
Connection；
The primary controller of the pile body side respectively with the controlled end of first drive module, second drive module
Controlled end and by-pass switch module controlled end connection, first drive module respectively drives the first order pressure regulator
And second pressure regulator carry out working condition adjusting；Second drive module is used for generating trigger signal driving inverter work
Make；The control terminal of the secondary controller of the vehicle-mounted side respectively with the controlled end of the open-circuit-protection relay and the second rectification
The controlled end of bridge is attached.
In the present embodiment, the first order pressure regulator is buck-boost type DC/DC converters；The second level pressure regulator is tool
There is the Boost converter of four interleaved PFC circuit topological structures.
In the present embodiment, the wireless charging system further includes battery manager, the output end of the battery manager with
The input terminal of secondary controller connects；The first input end of the battery manager and the second input terminal respectively with the second rectifier bridge
The first output end and second output terminal connection.
In the present embodiment, the wireless charging system further includes by-pass switch module, wherein the secondary controller monitors
The shutdown output request that battery manager is sent out, and shutdown output request signal is sent to primary side by secondary side communicator
Second level pressure regulation is bypassed, is used for when shortest by controller, the primary controller control by-pass switch module work
The interior input voltage for reducing inverter, and then rapidly reduce the output power of wireless charging system.Described in the present embodiment
The controllable switches device such as relay, contactor, IGBT can be used in by-pass switch.
In the present embodiment, the primary controller includes for sampling monitoring voltage, electric current with the secondary controller
The sampling monitoring module and control module of signal are electrically connected between the sampling monitoring module and control module.
It is LCC type reactive power compensation circuits in the present embodiment, in the primary side reactive-load compensator referring to Fig. 2, the primary side hair
Emitter is LC resonance circuit；Specifically have：First output termination compensation inductance L of the inverterf1Input terminal；Compensating electric capacity
Cf1One termination compensation inductance Lf1Output end, it is another termination inverter second output terminal；First capacitance C1One end be connected to
Compensate inductance Lf1Output end, the other end is connected to transmitting coil L1Input terminal；The transmitting coil L1Output end connection
To the second output terminal of inverter；As it can be seen that primary side reactive-load compensator has shared the first capacitance C with primary side transmitter1；The pair side
It is LCC type reactive power compensation circuits in reactive-load compensator, pair side receiver is LC resonance circuit, the primary side reactive-load compensator
And primary side transmitter is symmetrical on circuit structure with the secondary receiver in reactive-load compensator and pair respectively, and secondary side reactive-load compensator
The second capacitance C has been shared with secondary side receiver2。
In the present embodiment, the control module is for controlling working state of system when wireless charging system works
It adjusts, includes to be modified to be adjusted to ensure that the full-bridge inverter of primary side is operated in no-voltage for the second capacitance to secondary side
The capacitance adjustment unit of on off state, and further include for adjusting the output current of secondary side reactive-load compensator to ensure wireless charging
The current regulation unit that electric system is transmitted under maximum transmitted efficiency.
In the present embodiment, the both sides of first capacitance and second capacitance are parallel with multiple adjusting capacitive branch, this
In embodiment, it is set as 3 adjusting capacitive branch；The adjusting capacitive branch includes adjusting capacitance CkAnd it is corresponding with capacitance
Controllable switch；Switch by adjusting controllable switch can be realized is incorporated to the two of the first capacitance or the second capacitance by adjusting capacitance
Side, wherein the first capacitance and multiple adjusting capacitive branch of the second capacitance both sides keep synchronous adjustment action, in this way, can be real
Now the amendment of the first capacitance or the second capacitance is adjusted.
In the present embodiment, the inverter is full-bridge inverter, the incipient initialization shape of wireless charging system
State is that inverter is operated in initial setting frequency w0Working frequency on, at this point, detection full-bridge inverter in switch mosfet
Whether pipe is operated in the state that no-voltage is opened, if so, continuing to keep the working condition；If it is not, then passing through capacitance adjustment
Unit is adjusted, specially：
(1) acquisition wireless charging system is in setting working frequency w0The reality of primary side reactive-load compensator input terminal under work
The actual output voltage of input voltage and secondary side reactive-load compensator output end；
(2) acquisition of capacitance adjustment unit is collected actually enters voltage and actual output voltage, calculates capacitance adjustment
Amount：
In formula, Δ C is the capacitance adjustment amount calculated, w0The setting resonant frequency being operated in for wireless charging system；C1
For the first capacitance；vABVoltage is actually entered for primary side reactive-load compensator input terminal；vabFor secondary side reactive-load compensator output end
Actual output voltage；izvsThe theoretical current value of corresponding switching tube is flowed through when reaching zero voltage turn-off for switch mosfet pipe；γ is
Design capacity；K is the coefficient of coup of primary side transmitting coil and secondary side receiving coil；Lf1For primary side reactive-load compensation inductance；Lf2For pair
Side compensates inductance；L1For the inductance of primary side transmitting coil；PMAXThe power that can be transmitted for maximum.
(3) the adjusting capacitive branch for going control to be connected in parallel on the second capacitance both ends according to the capacitance adjustment amount being calculated corresponds to
Controllable switch；It desynchronizes accordingly also according to the capacitance adjustment amount and controls the adjusting capacitance branch for being connected in parallel on the first capacitance both ends
The corresponding controllable switch in road, to realize the adjustment to the first capacitance and the second capacitance.
(4) after adjusting, the resonant frequency between primary side transmitter and secondary side receiver also generates small variation, this
When, control module updates the working frequency w of full-bridge inverter0For the resonant frequency w after variationc；And it is driven by the second drive module
It is w that dynamic full-bridge inverter, which is operated in working frequency,cIn the state of.
In this preferred embodiment, the compensation circuit of a kind of primary side reactive-load compensator and secondary side reactive-load compensator is devised, is led to
It crosses and adjusts capacitive branch in the both ends parallel connection of the first capacitance and the second capacitance respectively, capacitance is acquired by capacitance adjustment unit
Regulated quantity, and by controllable switch control to adjust capacitive branch incision or excision, realize to the first capacitance and the second capacitance
Adjusting, and then ensure full-bridge inverter in switch mosfet pipe be operated in the state that no-voltage is opened.
In the present embodiment, the charging voltage of the battery is by the first order pressure regulator and the tune of second level pressure regulator
After section determine, after adjusting, the charging voltage before charging after, amplitude fluctuations are little；When battery by fill turn floating charge or
When floating charge turns to fill, all there is the variation of load and the variation of output power, and then cause the efficiency of transmission of system that can also make
At fluctuation, therefore in the course of work of wireless charging system, especially after the switching of charged state, need to wireless charging system
The energy transmission efficiency of system is adjusted, it is made to be returned to the higher working condition of energy transmission efficiency up.
In this regard, in the present embodiment, the current regulation unit has carried out circuit topology modeling to wireless charging system first
Analysis, and it is based on this, devise the calculation formula of the efficiency of transmission of the wireless charging system：
In formula, the η represents the efficiency of transmission of wireless charging system；ReqFor the second rectifier bridge and cell load is equivalent arrives
The equivalent resistance of secondary side reactive-load compensator output end, can pass throughIt is calculated, wherein vabFor secondary side reactive-load compensator
The actual output voltage of output end；To flow through the output current of secondary side reactive-load compensator output end；R2For in secondary side receiver
Secondary side receiving coil internal resistance；K is the coefficient of coup of primary side transmitting coil and secondary side receiving coil；Q1For primary side transmitting coil
Quality factor, whereinR1For the internal resistance of the primary side transmitting coil in primary side transmitter, L1For primary side emission lines
The inductance of circle；Q2For the quality factor of secondary side receiving coil,L2For the inductance of secondary side receiving coil；wcFor inversion
The working frequency of controlled tr tube in device.
By the extreme value of the calculation formula of the analysis and solution efficiency of transmission, the wireless charging system can be obtained and obtained most
The condition of big efficiency of transmission is that the output current of secondary side reactive-load compensator output end reaches current setting value, i.e.,：
Therefore the wireless charging system is wanted to obtain maximum efficiency of transmission, it is necessary first to by sampling monitoring module to secondary side
The output current of reactive-load compensator output end carries out acquisition monitoring in real time, and the output current of monitoring is sent to control module,
Difference control modulate circuit in control module is passed through by the way that the output current is obtained its differential mode compared with the current setting value
Processing generates feedback signal, and the second drive module receives feedback signal to the switching tube in full-bridge inverter in a switch periods
Interior service time is adjusted so that the output current value of secondary side reactive-load compensator output end passes through close to current setting value
It so adjusts, to ensure that wireless charging system works under higher efficiency of transmission.
This preferred embodiment, the principle of equal effects based on circuit model circuit, and analysis devises wireless charging system
Efficiency of transmission calculation formula, and the calculation formula according to the efficiency of transmission determine system obtain maximum transmitted efficiency item
Part is detected the output current of corresponding pair side reactive-load compensator output end in system according to the condition, and in primary-side-control
Feedback control is carried out in device so that charging system is adjusted in the working condition of maximum transmitted efficiency；By the above-mentioned means, adjusting
Section speed is fast, and calculation amount is small, realizes the raising to the efficiency of transmission of charging system.
In this preferred embodiment, by be arranged the first rectifier bridge, first order pressure regulator, intermediate capacitance, second level pressure regulator,
Inverter, primary side reactive-load compensator, primary side transmitter, primary controller, it is secondary in receiver, it is secondary while reactive-load compensator, second whole
Bridge and secondary controller are flowed, forms a kind of wireless charging system for electric vehicle, which can be operated in
It in higher transimission power, and can ensure that primary side full-bridge inverter is operated in the state that no-voltage is opened, and make the nothing
The efficiency of transmission of micro USB electric system is greatly improved by adjusting.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although being explained in detail to the present invention with reference to preferred embodiment, those skilled in the art answer
Work as analysis, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (7)
1. a kind of wireless charging system for electric vehicle, which is characterized in that include positioned at pile body side the first rectifier bridge,
Level-one pressure regulator, second level pressure regulator are connected in parallel on intermediate capacitance, inversion between first order pressure regulator and second level pressure regulator port
Device, primary side reactive-load compensator, primary side transmitter, for driving the first of first order pressure regulator and second level voltage regulator operation to drive
Module, the second drive module for driving inverter work, the primary side communicated for the secondary side communicator with vehicle-mounted end
Communicator and primary controller；Further include positioned at vehicle-mounted side it is secondary in receiver, it is secondary while reactive-load compensator, the second rectifier bridge,
For the unloaded or low open-circuit-protection relay for carrying protection, the secondary side communication communicated for the primary side communicator with pile body side
Device and secondary controller；
Wherein, the primary controller controls the direct current that the first order pressure regulation and the second level pressure regulation export rectifier bridge
Electricity carries out voltage and is adjusted to target voltage；DC inverter after carrying out overvoltage adjusting is become alternating current by the inverter,
After the alternating current is using primary side reactive-load compensator, it is transmitted to by primary side transmitter transmitting, the receiver reception of secondary side
Secondary side reactive-load compensator；The secondary controller, control second rectifier bridge by AC rectification at direct current after, export to
The energy-storage battery of automobile；
The secondary controller also is used for obtaining the required reception power of energy-storage battery, and generates maximum vehicle-mounted acceptable power
Information gives secondary side communicator, is emitted into primary controller by secondary side communicator, primary controller includes power threshold unit, institute
It states power threshold unit and calculates the maximum transmission power that transmits of the system in the case where second level pressure regulator does not access, it will
Maximum vehicle-mounted acceptable power is compared with the maximum transmission power of system, if the maximum transmission power of system meet it is vehicle-mounted
Maximum vehicle-mounted acceptable power, then primary controller, which continues to control second pressure regulator, does not work；If it is not, then control second is adjusted
Depressor, which works, is adjusted the input voltage of inverter.
2. a kind of wireless charging system for electric vehicle according to claim 1, which is characterized in that described first is whole
It flows the first input end of bridge and the second input terminal connects alternating current, the first output end of first rectifier bridge and second defeated
Outlet is connect with the first input end of the first order pressure regulator and the second input terminal respectively；The of the first order pressure regulator
One output end and second output terminal are connect with the first input end of the second level pressure regulator and the second input terminal respectively；Institute
The first output end of one end connection first order pressure regulator of intermediate capacitance is stated, the other end connects the second output of first order pressure regulator
End；The first output end and second output terminal of the second level pressure regulator respectively with the first input end of inverter and second
Input terminal connects；The first output end and second output terminal of the inverter respectively with the primary side reactive-load compensator first
Input terminal and the connection of the second input terminal；The first output end and second output terminal of the primary side reactive-load compensator respectively with institute
State first input end and the connection of the second input terminal of primary side transmitter；
The pair side receiver is connect with the primary side transmitter by electromagnetic coupling, the first output end of pair side receiver
And second output terminal is connect with the first input end of the secondary side reactive-load compensator and the second input terminal respectively；The pair side
The first output end and second output terminal of the reactive-load compensator first input end and second with second rectifier bridge respectively
Input terminal connects；The first output end and second output terminal of second rectifier bridge connect with the positive and negative anodes of energy-storage battery respectively
It connects；
The primary controller of the pile body side respectively with the controlled end of first drive module, second drive module by
Control the controlled end connection of end and by-pass switch module, first drive module respectively drive the first order pressure regulator and
Second pressure regulator carries out the adjusting of working condition；Second drive module is used for generating trigger signal driving inverter work；
The control terminal of the secondary controller of the vehicle-mounted side respectively with the controlled end and the second rectifier bridge of the open-circuit-protection relay
Controlled end be attached.
3. a kind of wireless charging system for electric vehicle according to claim 1, which is characterized in that the first order
Pressure regulator is buck-boost type DC/DC converters；The second level pressure regulator is with four interleaved PFC circuit topological structures
Boost converter.
4. a kind of wireless charging system for electric vehicle according to claim 1, which is characterized in that the wireless charging
Electric system further includes battery manager, and the output end of the battery manager and the input terminal of secondary controller connect；The electricity
The first input end of pool manager and the second input terminal connect with the first output end and second output terminal of the second rectifier bridge respectively
It connects.
5. a kind of wireless charging system for electric vehicle according to claim 1, which is characterized in that the wireless charging
Electric system further includes by-pass switch module, wherein the shutdown output request that secondary controller monitoring battery manager is sent out,
And the shutdown is exported into request signal, primary controller is sent to by secondary side communicator, the primary controller control bypass is opened
It closes module work to bypass second level pressure regulation, is used for reducing the input voltage of inverter, Jin Erxun within the shortest time
The output power of the reduction wireless charging system of speed.
6. a kind of wireless charging system for electric vehicle according to claim 1, which is characterized in that the primary side control
Device processed includes for sampling monitoring voltage, the sampling monitoring module of current signal and control mould with the secondary controller
Block is electrically connected between the sampling monitoring device and control module.
7. a kind of wireless charging system for electric vehicle according to claim 1, which is characterized in that the power door
The calculation formula for limiting the maximum transmission power that transmits of the unit computing system in the case where second level pressure regulator does not access is：
In formula, PMAXFor the maximum transmission power that can be transmitted, w0For the setting resonant frequency of wireless charging system；L1Emit for primary side
The inductance value of resonant inductance inside device；L2For the inductance value of the resonant inductance inside secondary side receiver；Lf1For the idle benefit of primary side
Repay the inductance value that inductance is compensated in device；Lf2To compensate the inductance value of inductance in secondary side reactive-load compensator；M is resonant inductance and compensation
Mutual inductance impact factor between inductance；K is the resonant inductance inside primary side transmitter and the resonant inductance inside the receiver of secondary side
Between the coefficient of coup；VABmaxFor only with the maximum input electricity of primary side reactive-load compensator input terminal when first order pressure regulator pressure regulation
Pressure；VoutFor the request input voltage of vehicle-mounted side energy-storage battery.
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| CN109742863A (en) * | 2018-12-27 | 2019-05-10 | 华为技术有限公司 | A kind of receiving end of wireless charging system, transmitting terminal and wireless charging system |
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| CN111769751A (en) * | 2020-05-15 | 2020-10-13 | 海信（山东）空调有限公司 | Direct current power supply circuit and air conditioner |
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| CN112706643A (en) * | 2020-12-23 | 2021-04-27 | 中兴新能源科技有限公司 | Charging current control method and wireless charging system of electric automobile |
| CN114050666A (en) * | 2021-10-27 | 2022-02-15 | 西安理工大学 | Efficiency optimization control method for wireless power transmission system |
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