CN110182073B - Electric automobile and wireless charging system and method thereof - Google Patents

Electric automobile and wireless charging system and method thereof Download PDF

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Publication number
CN110182073B
CN110182073B CN201910428805.9A CN201910428805A CN110182073B CN 110182073 B CN110182073 B CN 110182073B CN 201910428805 A CN201910428805 A CN 201910428805A CN 110182073 B CN110182073 B CN 110182073B
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Prior art keywords
electrically connected
circuit
wireless charging
power
vehicle
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CN110182073A (en
Inventor
陈泓泽
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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

Abstract

The invention discloses an electric automobile and a wireless charging system and method thereof, wherein the electric automobile comprises: the intelligent vehicle-mounted terminal is in wireless communication with the wireless charging device; the power receiving device is communicated with the intelligent vehicle-mounted terminal through a vehicle-mounted bus; when the electric automobile has a wireless charging demand, the power receiving device sends a charging request to the wireless charging device through the intelligent vehicle-mounted terminal, and the wireless charging device establishes an energy transmission relation with the electric automobile according to the charging request and provides electric energy for the electric automobile based on the energy transmission relation. This electric automobile need not to set up wireless communication module at the power receiving device, can realize wireless charging, can reduce its hardware cost from this to be favorable to the popularization of electric automobile wireless charging.

Description

Electric automobile and wireless charging system and method thereof
Technical Field
The invention relates to the technical field of vehicles, in particular to an electric vehicle, a wireless charging system of the electric vehicle and a wireless charging method of the electric vehicle.
Background
The networking of the automobile is a future automobile development direction parallel to automatic driving, light weight, new energy and the like, and along with the rapid development of an automobile networking technology and a mobile information technology, intelligent vehicle-mounted terminal equipment is increasingly popularized and upgraded, for example, a vehicle-mounted box TBOX is developed into a gateway in an automobile from the conventional simple data acquisition and uploading, is connected with an automobile body network, an automobile internal network and an automobile external network, provides support for the expansion of functions of audio-visual entertainment, navigation positioning, remote control, data management and the like of the automobile, and is a wireless charging technology for this purpose. Compared with a wired charging mode of charging through a charging pile, the power supply end and the electric automobile do not need direct electrical connection in the wireless charging technology, and the basic types of the wireless charging technology include electromagnetic induction, magnetic resonance, electric field coupling, microwave resonance and the like.
At present, an electric automobile mainly adopts an electromagnetic induction mode for wireless charging, and a wireless charging system of the electric automobile generally comprises a vehicle-mounted end and a ground end. In the technical scheme, the wireless communication modules are required to be integrated in the controller of the vehicle-mounted end and the controller of the ground end, so that the hardware cost of the controller is high, and the wireless charging popularization of the electric automobile is not facilitated.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide an electric vehicle, which can reduce the hardware cost of the electric vehicle, thereby facilitating the popularization of wireless charging of the electric vehicle.
The second objective of the present invention is to provide a wireless charging system for an electric vehicle.
The third purpose of the invention is to provide a wireless charging method for an electric automobile.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an electric vehicle, including: the intelligent vehicle-mounted terminal is in wireless communication with the wireless charging device; and the power receiving device is communicated with the intelligent vehicle-mounted terminal through a vehicle-mounted bus. When the electric automobile has a wireless charging demand, the power receiving device sends a charging request to the wireless charging device through the intelligent vehicle-mounted terminal, the wireless charging device establishes an energy transmission relation with the electric automobile according to the charging request, and provides electric energy for the electric automobile based on the energy transmission relation.
According to the electric automobile provided by the embodiment of the invention, the intelligent vehicle-mounted terminal and the wireless charging device are in wireless communication, and the power receiving device and the intelligent vehicle-mounted terminal are in communication through the bus, so that the communication between the power receiving device and the intelligent vehicle-mounted terminal is realized. This electric automobile need not to set up wireless communication module at the power receiving device, can realize wireless charging, can reduce its hardware cost from this to be favorable to the popularization of electric automobile wireless charging.
In addition, the electric vehicle according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the power receiving apparatus includes: a first power transfer circuit to establish an energy transfer relationship with the wireless charging device; the input end of the power receiving unit is electrically connected with the first power transmission circuit, and the output end of the power receiving unit is electrically connected with a power battery of the electric automobile; the first controller is communicated with the intelligent vehicle-mounted terminal through the vehicle-mounted bus, and is used for sending a charging request to the wireless charging device through the intelligent vehicle-mounted terminal and controlling the power receiving unit so as to charge the electric energy transmitted by the wireless charging device and received by the first power transmission circuit to the power battery.
According to one embodiment of the invention, the first power transfer circuit employs an LCCL resonant circuit, the LCCL resonant circuit comprising: one end of the first resonant inductor is electrically connected with the first input end of the power receiving unit; one end of the first resonant capacitor is electrically connected with the other end of the first resonant inductor; one end of the second resonance capacitor is electrically connected with one end of the first resonance capacitor, and the other end of the second resonance capacitor is electrically connected with a second input end of the power receiving unit; one end of the third resonant capacitor is electrically connected with the other end of the second resonant capacitor; and one end of the second resonant inductor is electrically connected with the other end of the first resonant capacitor, and the other end of the second resonant inductor is electrically connected with the other end of the third resonant capacitor.
According to one embodiment of the invention, the power receiving unit comprises a rectifying circuit and a load rejection protection circuit which are electrically connected in sequence, wherein an input end of the rectifying circuit is electrically connected with the first power transmission circuit, and an output end of the load rejection protection circuit is electrically connected with the power battery.
According to an embodiment of the present invention, the rectifier circuit adopts a full-bridge rectifier structure, and the load rejection protection circuit includes: the power supply circuit comprises a first resistor and a first switching tube which are connected in series, wherein one end of the first resistor and one end of the first switching tube which are connected in series are electrically connected with a first output end of the first power transmission circuit, and the other end of the first resistor and the other end of the first switching tube which are connected in series are electrically connected with a second output end of the first power transmission circuit and are grounded; the second resistor and the second switch tube are connected in series, one end of the second resistor and one end of the second switch tube are connected with the first output end of the first power transmission circuit in series, and the other end of the second resistor and the other end of the second switch tube are connected with the second output end of the first power transmission circuit in series and are grounded. And the grids of the first switching tube and the second switching tube are connected with the first controller.
In order to achieve the above object, a second aspect of the present invention provides a wireless charging system for an electric vehicle, including a wireless charging device and the electric vehicle provided in the first aspect of the present invention.
According to the wireless charging system of the electric automobile, wireless charging can be achieved without arranging a wireless communication module on the power receiving device, so that the hardware cost of the electric automobile can be reduced, and the popularization of the wireless charging of the electric automobile is facilitated.
In addition, the wireless charging system for the electric vehicle according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the wireless charging apparatus includes: the second power transmission circuit is used for establishing an energy transmission relation with the electric automobile; the input end of the charging unit is electrically connected with a mains supply, and the output end of the charging unit is electrically connected with the second power transmission circuit; and the second controller is electrically connected with the charging unit and wirelessly communicated with the intelligent vehicle-mounted terminal, and is used for controlling the charging unit according to the charging request when receiving the charging request sent by the intelligent vehicle-mounted terminal, establishing an energy transmission relation between the charging unit and the electric automobile through the second power transmission circuit, and transmitting the electric energy provided by the commercial power to the electric automobile based on the energy transmission relation.
According to an embodiment of the present invention, the charging unit includes a lightning protection circuit, an electromagnetic compatibility filter circuit, a power factor correction circuit, a buck converter circuit, and a high-frequency inverter circuit, which are electrically connected in sequence, wherein an input end of the lightning protection circuit is electrically connected to the utility power, and an output end of the high-frequency inverter circuit is electrically connected to the second power transmission circuit.
According to one embodiment of the invention, the lightning protection circuit comprises: one end of the first piezoresistor is electrically connected with a live wire of the commercial power, and the other end of the first piezoresistor is electrically connected with a zero line of the commercial power; one end of the fuse is electrically connected with the zero line; the second piezoresistor is electrically connected with the live wire at one end; one end of the discharge tube group is electrically connected with the other end of the second piezoresistor, and the other end of the discharge tube group is grounded; and one end of the third piezoresistor is electrically connected with the other end of the fuse, and the other end of the third piezoresistor is electrically connected with one end of the discharge tube group.
In order to achieve the above object, a third aspect of the present invention provides a wireless charging method for an electric vehicle, where the electric vehicle includes an intelligent vehicle-mounted terminal and a power receiving device, the intelligent vehicle-mounted terminal and the wireless charging device communicate with each other wirelessly, and the power receiving device and the intelligent vehicle-mounted terminal communicate with each other via a vehicle-mounted bus, the method including: when the electric automobile has a wireless charging demand, the power receiving device sends a charging request to the wireless charging device through the intelligent vehicle-mounted terminal; the wireless charging device establishes an energy transmission relation with the electric automobile according to the charging request, and provides electric energy for the electric automobile based on the energy transmission relation.
According to the wireless charging method of the electric automobile, wireless charging can be achieved without arranging a wireless communication module on the power receiving device, so that the hardware cost of the electric automobile can be reduced, and the popularization of the wireless charging of the electric automobile is facilitated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic configuration diagram of a power receiving apparatus according to an example of the present invention;
FIG. 3 is a schematic diagram of a rectifier circuit according to an example of the present invention;
FIG. 4 is a schematic diagram of a load dump protection circuit according to an example of the present invention;
fig. 5 is a schematic structural diagram of a wireless charging system of an electric vehicle according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a wireless charging system of an electric vehicle according to an example of the present invention;
FIG. 7 is a schematic structural diagram of a lightning protection circuit according to an example of the invention;
FIG. 8 is a schematic diagram of an electromagnetic compatibility filter circuit according to an example of the present invention;
FIG. 9 is a schematic diagram of a power factor correction circuit according to one example of the invention;
FIG. 10 is a schematic diagram of a buck converter circuit according to an example of the invention;
fig. 11 is a schematic structural view of a high-frequency inverter circuit according to an example of the present invention;
fig. 12 is a flowchart of a wireless charging method of an electric vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An electric vehicle and a wireless charging system and method for an electric vehicle according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention.
As shown in fig. 1, the electric vehicle 100 includes: the intelligent vehicle-mounted terminal 10 and the power receiving device 20.
The intelligent vehicle-mounted terminal 10 and the wireless charging device 200 are in wireless communication; the power receiving device 20 and the smart in-vehicle terminal 10 communicate with each other via a vehicle-mounted bus. When the electric vehicle 100 has a wireless charging demand, the powered device 20 sends a charging request to the wireless charging device 200 through the smart in-vehicle terminal 10, and the wireless charging device 200 establishes an energy transmission relationship with the electric vehicle 100 according to the charging request and provides electric energy to the electric vehicle 100 based on the energy transmission relationship.
Specifically, wireless communication modules may be respectively disposed in the intelligent vehicle-mounted terminal 10 and the wireless charging device 200, so that the intelligent vehicle-mounted terminal 10 and the wireless charging device 200 perform communication wirelessly, the power receiving device 20 and the intelligent vehicle-mounted terminal 10 are connected through a vehicle-mounted bus, and the power receiving device 20 may multiplex the wireless communication modules in the intelligent vehicle-mounted terminal 10 through the vehicle-mounted bus, thereby implementing communication between the power receiving device 20 and the wireless charging device 200.
Specifically, when the electric vehicle 100 has a wireless charging demand, the power receiving device 20 sends a charging request, the power receiving device 20 sends the charging request to the intelligent vehicle-mounted terminal 10 through the vehicle-mounted bus, after receiving the charging request, the intelligent vehicle-mounted terminal 10 may prompt the user that the power receiving device 20 has sent the charging request in a voice and/or text manner, so that the user knows the current state of the electric vehicle 100, and transmits the charging request to the wireless charging device 200 through wireless communication, and the wireless charging device 200 establishes an energy transmission relationship with the electric vehicle 100 according to the charging request, and provides electric energy to the power receiving device 20 based on the energy transmission relationship, so as to charge the electric vehicle 100 and meet the charging demand.
It is to be understood that the energy transmission relationship may be one of electromagnetic induction, magnetic resonance, electric field coupling, and microwave resonance, and the present invention may preferably adopt an electromagnetic induction manner, that is, the energy transmission between the wireless charging device 200 and the power receiving device 20 may be performed by an electromagnetic induction manner.
Compared with the electric automobile provided with the wireless communication module in the power receiving device, the electric automobile provided by the embodiment of the invention has the advantage of low hardware cost, so that the electric automobile is favorable for popularization of wireless charging of the electric automobile.
In one example of the present invention, as shown in fig. 2, the power receiving device 20 may include: a first power transfer circuit 21, a power receiving unit 22, and a first controller 23.
The first power transmission circuit 21 is configured to establish an energy transmission relationship with the wireless charging device 200; the input end of the power receiving unit 22 is electrically connected to the first power transmission circuit 21, and the output end of the power receiving unit 22 is electrically connected to the power battery 40 of the electric vehicle 100; the first controller 23 communicates with the intelligent in-vehicle terminal 10 through the in-vehicle bus, and the first controller 23 is configured to send a charging request to the wireless charging device 200 through the intelligent in-vehicle terminal 10, and control the power receiving unit 22 to charge the power battery 40 with the electric energy supplied from the wireless charging device 200 received by the first power transmission circuit 21.
Further, referring to fig. 2, the first power transmission circuit 21 may employ an LCCL resonance circuit including: a first resonant inductance Ls1, a first resonant capacitor Cs1, a second resonant capacitor Cs2, a third resonant capacitor Cs3 and a second resonant inductance Ls 2.
Wherein, one end of the first resonant inductor Ls1 is electrically connected to the first input terminal of the power receiving unit 22; one end of the first resonant capacitor Cs1 is electrically connected to the other end of the first resonant inductor Ls 1; one end of the second resonance capacitor Cs2 is electrically connected to one end of the first resonance capacitor Cs1, and the other end of the second resonance capacitor Cs2 is electrically connected to the second input terminal of the power receiving unit 22; one end of the third resonant capacitor Cs3 is electrically connected to the other end of the second resonant capacitor Cs 2; one end of a second resonant inductor Ls2 is electrically connected to the other end of the first resonant capacitor Cs1, and the other end of the second resonant inductor Ls2 is electrically connected to the other end of the third resonant capacitor Cs 3.
Still further, referring to fig. 2, the power receiving unit 22 may include a rectifying circuit 221 and an unload protection circuit 222 electrically connected in sequence, wherein an input end of the rectifying circuit 221 is electrically connected with the first power transmission circuit 21, and an output end of the unload protection circuit 222 is electrically connected with the power battery 40.
In this example, as shown in fig. 3 and 4, the rectifying circuit 221 may adopt a full-bridge rectifying structure, and the load dump protection circuit 222 may include: the circuit comprises a first resistor R1 and a first switch tube Q1 which are connected in series, and a second resistor R2 and a second switch tube Q2 which are connected in series.
One end of the first resistor R1 and the first switch tube Q1 connected in series is electrically connected with the first output end of the first power transmission circuit 21, and the other end of the first resistor R1 and the first switch tube Q1 connected in series is electrically connected with the second output end of the first power transmission circuit 21 and is grounded GND; one end of the second resistor R2 and the second switch tube Q2 connected in series is electrically connected to the first output end of the first power transmission circuit 21, the other end of the second resistor R2 and the second switch tube Q2 connected in series is electrically connected to the second output end of the first power transmission circuit 21 and is grounded GND, and the gates of the first switch tube Q1 and the second switch tube Q2 are both connected to the first controller 23.
Specifically, when the powered device 20 sends a charging request, the first power transmission circuit 21 in the powered device 20 establishes an energy transmission relationship with the wireless charging device 200, the first controller 23 sends the charging request to the intelligent in-vehicle terminal 10 through the in-vehicle bus, the intelligent in-vehicle terminal 10 sends the charging request to the wireless charging device 200 through wireless communication, after receiving the charging request, the wireless charging device 200 establishes an energy transmission relationship with the first power transmission circuit 21 according to the charging request and provides electric energy to the first power transmission circuit 21 according to the energy transmission relationship, the first power transmission circuit 21 receives the electric energy provided by the wireless charging device 200 according to the energy transmission relationship and outputs alternating current to the rectifying circuit 221, wherein the energy transmission relationship can be in an electromagnetic induction manner, and then the first controller 23 controls the rectifying circuit 221 to rectify the alternating current, so that the rectifying circuit 221 outputs pulsating direct current, and the pulsating direct current passes through the load rejection protection circuit 222 and then is output to the power battery 40 of the electric vehicle 100, so as to provide required direct current for the power battery 40, thereby meeting the charging requirement of the electric vehicle 100.
When the wireless charging device 10 is used to wirelessly charge the electric vehicle 100, the first controller 23 may detect the output voltage (rectified voltage) of the rectifying circuit 221 in real time, and when a load rejection phenomenon occurs, such as sudden disconnection of the power battery 40, a transient pulse with large energy may be caused, at this time, the first controller 23 detects an overshoot of the rectified voltage, and then controls the conduction of the first switching tube Q1 and the second switching tube Q2 in the load rejection protection circuit 222, and energy is discharged to the ground GND through the first resistor R1 and the second resistor R2, thereby avoiding damage caused by load rejection.
Preferably, referring to fig. 3, the rectifying circuit 221 may include: the rectifier diode D1-D4, the fifth capacitor C5 and the fifth inductor L5 are used for high power, and the rectifier circuit 221 receives the alternating current voltage output by the first power transmission circuit 21 and converts the alternating current voltage into pulsating direct current so as to meet the direct current requirement of the power battery 40.
To sum up, the electric vehicle of the embodiment has the advantages that the first controller communicates with the intelligent vehicle-mounted terminal through the vehicle-mounted bus, and the intelligent vehicle-mounted terminal communicates with the wireless charging device through the wireless communication, so that the communication between the first controller and the wireless charging device is realized.
Fig. 5 is a block diagram of a wireless charging system of an electric vehicle according to an embodiment of the present invention.
As shown in fig. 5, the wireless charging system 1000 for an electric vehicle includes: wireless charging device 200 and electric automobile 100 of the embodiment that has just been described.
In one embodiment of the present invention, as shown in fig. 6, the wireless charging device 200 may include: a second power transmission circuit 31, a charging unit 32, and a second controller 33.
The second power transmission circuit 31 is used for establishing an energy transmission relationship with the electric vehicle 100; the input end of the charging unit 32 is electrically connected to the commercial power 1, and the output end of the charging unit 32 is electrically connected to the second power transmission circuit 31; the second controller 33 is electrically connected to the charging unit 32 and wirelessly communicates with the intelligent vehicle-mounted terminal 10, and the second controller 33 is configured to control the charging unit 32 according to a charging request when receiving the charging request sent by the intelligent vehicle-mounted terminal 10, establish an energy transmission relationship with the electric vehicle 100 through the second power transmission circuit 31, and transmit the electric energy provided by the utility power 1 to the electric vehicle 100 based on the energy transmission relationship.
Preferably, referring to fig. 5, the structure of the second power transmission circuit 31 may be arranged symmetrically to the structure of the first power transmission circuit 21, so that the second power transmission circuit and the first power transmission circuit may form a resonant topology of LCCL-LCCL, and the energy transmission relationship between the second power transmission circuit 31 and the first power transmission circuit 21 may be based on the principle of electromagnetic induction, which has the advantage of high transmission efficiency in energy transmission.
Specifically, referring to fig. 5, the first controller 23 communicates with the smart in-vehicle terminal 10 through an in-vehicle bus, and the smart in-vehicle terminal 10 communicates with the second controller 33 through wireless communication, so that the communication between the first controller 23 and the second controller 33 is realized, after the wireless charging device 200 receives the charging request, the second controller 33, upon receiving the charging request, the energy transfer relationship with the first power transfer circuit 21 is established by the second power transfer circuit 31, and provides the electric energy to the first power transmission circuit 21 according to the energy transmission relationship, the first power transmission circuit 21 receives the electric energy provided by the second power transmission circuit 21 according to the energy transmission relationship, and controls the charging unit 32 according to the charging request, so as to transmit the alternating current output by the commercial power 1 to the power battery 40 based on the energy transmission relation.
Therefore, the wireless charging system can improve the electric energy transmission efficiency through the first power transmission circuit and the second power transmission circuit, avoids energy waste, is stable and safe in hardware architecture, and contributes to popularization of wireless charging.
In an example of the present invention, referring to fig. 6, the charging unit 32 may include a lightning protection circuit 321, an electromagnetic compatibility filter circuit 322, a power factor correction circuit 323, a buck converter circuit 324, and a high frequency inverter circuit 325, which are electrically connected in sequence, wherein an input end of the lightning protection circuit 321 is electrically connected to the commercial power 1, and an output end of the high frequency inverter circuit 325 is electrically connected to the second power transmission circuit 31.
In one example, as shown in FIG. 7, the lightning protection circuit 321 may include: the voltage-sensitive fuse-based LED driving circuit comprises a first voltage-sensitive resistor VDR1, a fuse F1, a second voltage-sensitive resistor VDR2, a discharge tube group V1 and a third voltage-sensitive resistor VDR 3.
One end of the first piezoresistor VDR1 is electrically connected with the live wire L of the commercial power 1, and the other end of the first piezoresistor VDR1 is electrically connected with the zero wire N of the commercial power 1; one end of the fuse F1 is electrically connected with the zero line N; one end of the second piezoresistor VDR2 is electrically connected with the live line L; one end of the discharge tube group V1 is electrically connected with the other end of the second piezoresistor VDR2, and the other end of the discharge tube group V1 is grounded PE; one end of the third piezoresistor VDR3 is electrically connected with the other end of the fuse F1, and the other end of the third piezoresistor VDR3 is electrically connected with one end of the discharge tube group V1.
Therefore, when the lightning strike large current happens, the piezoresistor is broken down, and when the current in the circuit is larger than the parameter of the fuse, the fuse is burnt immediately, so that the purpose of protecting the rear-stage circuit is achieved.
As shown in fig. 8, the electromagnetic compatibility filter circuit 322 in this example may include: the circuit comprises a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first Y capacitor CY1, a first X capacitor CX1, a second Y capacitor CY2, a first common mode inductor LM1 and a second X capacitor CX 2.
The third resistor R3, the fourth resistor R4 and the fifth resistor R5 are connected in series, one end of the third resistor R3, the fourth resistor R4 and the fifth resistor R5 which are connected in series is electrically connected with the live wire L, and the other end of the third resistor R3, the fourth resistor R4 and the fifth resistor R5 which are connected in series is electrically connected with one end of the third piezoresistor VDR 3; one end of the first Y capacitor CY1 is electrically connected to the live line L, and the other end of the first Y capacitor CY1 is grounded; one end of the first X capacitor CX1 is electrically connected with the live line L, and the other end of the first X capacitor CX1 is electrically connected with one end of the third piezoresistor VDR 3; one end of the second Y capacitor CY2 is electrically connected with one end of the third piezoresistor VDR3, and the other end of the second Y capacitor CY2 is grounded PE; the first end of the first common mode inductor LM1 is electrically connected with a live wire L, and the second end of the first common mode inductor LM1 is electrically connected with one end of a third piezoresistor VDR 3; one end of the second X capacitor CX2 is electrically connected to the third end of the first common mode inductor LM1, and the other end of the second X capacitor CX2 is electrically connected to the fourth end of the first common mode inductor LM 1.
Further, referring to fig. 8, the electromagnetic compatibility filter circuit 322 in this example may further include: a third Y capacitor CY3, a third X capacitor CX3, a fourth Y capacitor CY4, a second common mode inductor LM2, and a fourth X capacitor CX 4.
One end of the third Y capacitor CY3 is electrically connected to the fourth end of the first common mode inductor LM1, and the other end of the third Y capacitor CY3 is grounded; one end of the third X capacitor CX3 is electrically connected with the fourth end of the first common mode inductor LM1, and the other end of the third X capacitor CX3 is electrically connected with the third end of the first common mode inductor LM 1; one end of a fourth Y capacitor CY4 is electrically connected with the third end of the first common mode inductor LM1, and the other end of the fourth Y capacitor CY4 is grounded PE; the first end of the second common-mode inductor LM2 is electrically connected with the fourth end of the first common-mode inductor LM1, and the second end of the second common-mode inductor LM2 is electrically connected with the third end of the first common-mode inductor LM 1; one end of the fourth X capacitor CX4 is electrically connected to the third end of the second common mode inductor LM2, and the other end of the fourth X capacitor CX4 is electrically connected to the fourth end of the second common mode inductor LM 2.
Still further, referring to fig. 8, the emc filter circuit 322 may further include: the circuit comprises a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a fifth Y capacitor CY5, a sixth Y capacitor CY6, a third common-mode inductor LM3 and a fifth X capacitor CX 5.
The sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are connected in series, one end of the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 which are connected in series is electrically connected with the fourth end of the second common-mode inductor LM2, and the other end of the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 which are connected in series is electrically connected with the third end of the second common-mode inductor LM 2; one end of a fifth Y capacitor CY5 is electrically connected with the fourth end of the second common-mode inductor LM2, and the other end of the fifth Y capacitor CY5 is grounded PE; one end of a sixth Y capacitor CY6 is electrically connected with the third end of the second common-mode inductor LM2, and the other end of the sixth Y capacitor CY6 is grounded PE; the first end of the third common-mode inductor LM3 is electrically connected with the fourth end of the second common-mode inductor LM2, and the second end of the third common-mode inductor LM3 is electrically connected with the third end of the second common-mode inductor LM 2; one end of the fifth X capacitor CX5 is electrically connected to the third end of the third common mode inductor LM3, and the other end of the fifth X capacitor CX5 is electrically connected to the fourth end of the third common mode inductor LM 3.
Specifically, common-mode electromagnetic interference signals in the circuit can be filtered through the common-mode inductor, differential-mode interference is suppressed through the X capacitor, common-mode interference is suppressed through the Y capacitor, and the electromagnetic compatibility filter circuit adopts three-level filtering, so that the filter effect is greatly improved, the anti-electromagnetic interference capability of the system is improved, and the electromagnetic compatibility of the system is ensured.
In one example of the present invention, as shown in fig. 9, the power factor correction circuit 323 may include: the inductor comprises a first inductor L1, a second inductor L2, a third switching tube Q3, a fourth switching tube Q4, a fifth switching tube Q5 and a sixth switching tube Q6.
One end of the first inductor L1 is electrically connected with the third end of the third common-mode inductor LM 3; one end of the second inductor L2 is electrically connected with the fourth end of the third common-mode inductor LM 3; the source of the third switching tube Q3 is electrically connected with the other end of the second inductor L2; the source electrode of the fourth switching tube Q4 is electrically connected with the other end of the first inductor L1, and the drain electrode of the fourth switching tube Q4 is electrically connected with the drain electrode of the third switching tube Q3; the drain of the fifth switch tube Q5 is electrically connected with the other end of the second inductor L2, and the source of the fifth switch tube Q5 is grounded GND; the drain of the sixth switch Q6 is electrically connected to the other end of the first inductor L1, and the source of the sixth switch Q6 is grounded to GND. The gates of the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are all connected to the second controller 33.
Specifically, when the ac power output by the utility power 1 is output to the power factor correction circuit 323 through the lightning protection circuit 321 and the emc filter circuit 322, the second controller 33 controls the third switching tube Q3, the fourth switching tube Q4, the fifth switching tube Q5 and the sixth switching tube Q6 of the power factor correction circuit 323 to be turned on and off, so that the ac power is converted into pulsating dc power, and the power factor is improved through the first inductor L1 and the second inductor L2.
Therefore, the power factor correction circuit can convert alternating current into pulsating direct current, improve the power factor and further improve the electric energy utilization rate.
In one example of the present invention, as shown in fig. 10, the buck converter circuit 324 may include: the circuit comprises a first capacitor C1, a seventh switch tube Q7, an eighth switch tube Q8, a third inductor L3, a freewheeling diode D23 and a second capacitor C2.
One end of the first capacitor C1 is electrically connected to the drain of the second switch transistor Q2, and the second end of the first capacitor C1 is grounded to GND; the drain electrode of the seventh switch tube Q7 is electrically connected with one end of the first capacitor C1; the drain electrode of the eighth switch tube Q8 is electrically connected with the drain electrode of the seventh switch tube Q7, and the source electrode of the eighth switch tube Q8 is electrically connected with the source electrode of the seventh switch tube Q7; one end of the third inductor L3 is electrically connected to the source of the eighth switch Q8 and the source of the seventh switch Q7, respectively; the cathode of the freewheeling diode D23 is electrically connected to one end of the third inductor L3, and the anode of the freewheeling diode D23 is grounded to GND; one end of the second capacitor C2 is electrically connected to the other end of the third inductor L3, and the other end of the second capacitor C2 is grounded to GND. The gates of the seventh switch Q7 and the eighth switch Q8 are connected to the second controller 33.
Specifically, after the power factor correction circuit 323 outputs the pulsating direct current to the buck converter circuit 324, the second controller 33 controls the seventh switch Q7 and the eighth switch Q8 to turn on and off to perform the voltage reduction processing on the pulsating direct current, so that the buck converter circuit 324 outputs the stable direct current. Therefore, the wide output voltage range can be output to adapt to the charging requirements of different power batteries,
in one example of the present invention, as shown in fig. 11, the high frequency inverter circuit 325 includes: a third capacitor C3, a ninth switch tube Q9, a tenth switch tube Q10, an eleventh switch tube Q11, a twelfth switch tube Q12, a fourth capacitor C4 and a fourth inductor L4.
The third capacitor C3 is connected in parallel with the second capacitor C2; the drain of the ninth switching tube Q9 is electrically connected to one end of the third capacitor C3; the drain of the tenth switching tube Q10 is electrically connected to one end of the third capacitor C3; the drain electrode of the eleventh switch tube Q11 is electrically connected with the source electrode of the ninth switch tube Q9, and the source electrode of the eleventh switch tube Q11 is grounded; the drain electrode of the twelfth switching tube Q12 is electrically connected with the source electrode of the tenth switching tube Q10, and the source electrode of the twelfth switching tube Q12 is grounded; the fourth capacitor C4 and the fourth inductor L4 are connected in series, and the series connection of the fourth capacitor C4 and the fourth inductor L4 is connected between the source of the ninth switching tube Q9 and the source of the tenth switching tube Q10. The gates of the ninth switch tube Q9, the tenth switch tube Q10, the eleventh switch tube Q11 and the twelfth switch tube Q12 are all connected to the second controller 33.
Specifically, the direct current output by the buck converter circuit 324 is filtered by a third capacitor C3, and then is alternately switched on and off by an inverter bridge arm composed of a ninth switching tube Q9, a tenth switching tube Q10, an eleventh switching tube Q11 and a twelfth switching tube Q12 to generate alternating positive and negative currents, wherein the voltage waveform of the alternating current is approximate to a square wave, and the square wave is converted into a sine wave when passing through the LCCL resonant circuit. Therefore, the direct current is converted into alternating current with the waveform approximate to square wave through the high-frequency inverter circuit.
Specifically, the ac power output by the utility power 1 first passes through the lightning protection circuit 321 and the electromagnetic compatibility filter circuit 322, the ac power passes through the electromagnetic compatibility filter circuit 322 to filter out unwanted noise in the ac power, then passes through the power factor correction circuit 323 to convert the ac power into pulsating dc power, and at the same time, the power factor is increased and output to the voltage-decreasing type conversion circuit 324, the voltage-decreasing type conversion circuit 324 performs voltage-decreasing processing on the pulsating dc power and outputs to the high-frequency inverter circuit 325, the dc power is processed by the high-frequency inverter circuit 325 and converted into high-frequency ac power, the voltage waveform of the high-frequency ac power is similar to a square wave, the square wave is converted into a sine wave when passing through the second power transmission circuit 31, according to the electromagnetic induction principle, the first power transmission circuit 21 receives the high-frequency sine ac power output by the second power output circuit 31 and outputs to the, the pulsating direct current is output to the power battery 40 after passing through the load rejection protection circuit 222, so as to charge the power battery 40, thereby meeting the charging requirement of the electric vehicle 100.
In summary, the wireless charging system of the electric vehicle in the embodiment of the invention can reduce hardware cost, and has a load rejection protection function, so as to ensure safety during wireless charging, and in addition, through the power factor correction circuit, the buck conversion circuit and the LCCL resonant circuit, electric energy transmission efficiency can be improved, a wider output voltage range can be output to adapt to charging requirements of different power batteries, and the hardware architecture of the wireless charging system is safe, stable and high in efficiency, so that the wireless charging of the electric vehicle can be promoted.
Fig. 12 is a flowchart of a wireless charging method of an electric vehicle according to an embodiment of the present invention.
In this embodiment, the electric vehicle includes intelligent vehicle-mounted terminal and powered device, and the communication is carried out through wireless between intelligent vehicle-mounted terminal and the wireless charging device, and the communication is carried out through vehicle-mounted bus between powered device and the intelligent vehicle-mounted terminal.
As shown in fig. 12, the wireless charging method for the electric vehicle includes the following steps:
and S1, when the electric automobile has a wireless charging demand, the power receiving device sends a charging request to the wireless charging device through the intelligent vehicle-mounted terminal.
And S2, the wireless charging device establishes an energy transmission relation with the electric automobile according to the charging request and provides electric energy for the electric automobile based on the energy transmission relation.
For another implementation of the wireless charging method for an electric vehicle according to the embodiment of the present invention, reference may be made to the specific implementation of the wireless charging system for an electric vehicle according to the above embodiment of the present invention, and details are not described herein again.
According to the wireless charging method of the electric automobile, wireless charging can be achieved without arranging a wireless communication module on a power receiving device of the electric automobile, so that the hardware cost of the electric automobile can be reduced, the safety during wireless charging can be guaranteed through load rejection protection, in addition, the electric energy transmission efficiency can be improved through the power factor correction circuit, the buck conversion circuit and the LCCL resonant circuit, a wider output voltage range is output to meet the charging requirements of different power batteries, and the wireless charging method of the electric automobile is safe, stable and high in efficiency, so that the popularization of the wireless charging of the electric automobile is facilitated.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (8)

1. An electric vehicle, comprising:
the intelligent vehicle-mounted terminal is in wireless communication with the wireless charging device;
the power receiving device is communicated with the intelligent vehicle-mounted terminal through a vehicle-mounted bus;
when the electric automobile has a wireless charging demand, the power receiving device sends a charging request to the wireless charging device through the intelligent vehicle-mounted terminal, the wireless charging device establishes an energy transmission relation with the electric automobile according to the charging request, and provides electric energy for the electric automobile based on the energy transmission relation;
the power receiving device includes:
a first power transfer circuit to establish an energy transfer relationship with the wireless charging device;
the input end of the power receiving unit is electrically connected with the first power transmission circuit, and the output end of the power receiving unit is electrically connected with a power battery of the electric automobile;
the first controller is communicated with the intelligent vehicle-mounted terminal through the vehicle-mounted bus, and is used for sending a charging request to the wireless charging device through the intelligent vehicle-mounted terminal and controlling the power receiving unit so as to charge the electric energy transmitted by the wireless charging device and received by the first power transmission circuit to the power battery;
the power receiving unit comprises a rectifying circuit and a load throwing protection circuit which are sequentially and electrically connected, wherein the input end of the rectifying circuit is electrically connected with the first power transmission circuit, and the output end of the load throwing protection circuit is electrically connected with the power battery.
2. The electric vehicle of claim 1, wherein the first power transfer circuit employs an LCCL resonant circuit comprising:
one end of the first resonant inductor is electrically connected with the first input end of the power receiving unit;
one end of the first resonant capacitor is electrically connected with the other end of the first resonant inductor;
one end of the second resonance capacitor is electrically connected with one end of the first resonance capacitor, and the other end of the second resonance capacitor is electrically connected with a second input end of the power receiving unit;
one end of the third resonant capacitor is electrically connected with the other end of the second resonant capacitor;
and one end of the second resonant inductor is electrically connected with the other end of the first resonant capacitor, and the other end of the second resonant inductor is electrically connected with the other end of the third resonant capacitor.
3. The electric vehicle of claim 1, wherein the rectification circuit adopts a full-bridge rectification structure, and the load rejection protection circuit comprises:
the power supply circuit comprises a first resistor and a first switching tube which are connected in series, wherein one end of the first resistor and one end of the first switching tube which are connected in series are electrically connected with a first output end of the first power transmission circuit, and the other end of the first resistor and the other end of the first switching tube which are connected in series are electrically connected with a second output end of the first power transmission circuit and are grounded;
the second resistor and the second switching tube are connected in series, one end of the second resistor and one end of the second switching tube which are connected in series are electrically connected with the first output end of the first power transmission circuit, and the other end of the second resistor and the other end of the second switching tube which are connected in series are electrically connected with the second output end of the first power transmission circuit and are grounded;
and the grids of the first switching tube and the second switching tube are connected with the first controller.
4. A wireless charging system for an electric vehicle, comprising a wireless charging device and an electric vehicle according to any one of claims 1 to 3.
5. The wireless charging system for electric vehicles according to claim 1, wherein the wireless charging device comprises:
the second power transmission circuit is used for establishing an energy transmission relation with the electric automobile;
the input end of the charging unit is electrically connected with a mains supply, and the output end of the charging unit is electrically connected with the second power transmission circuit;
and the second controller is electrically connected with the charging unit and wirelessly communicated with the intelligent vehicle-mounted terminal, and is used for controlling the charging unit according to the charging request when receiving the charging request sent by the intelligent vehicle-mounted terminal, establishing an energy transmission relation between the charging unit and the electric automobile through the second power transmission circuit, and transmitting the electric energy provided by the commercial power to the electric automobile based on the energy transmission relation.
6. The wireless charging system of an electric vehicle according to claim 5, wherein the charging unit comprises a lightning protection circuit, an electromagnetic compatibility filter circuit, a power factor correction circuit, a buck converter circuit and a high frequency inverter circuit, which are electrically connected in sequence, wherein an input end of the lightning protection circuit is electrically connected to the utility power, and an output end of the high frequency inverter circuit is electrically connected to the second power transmission circuit.
7. The wireless charging system for electric vehicles according to claim 6, wherein the lightning protection circuit comprises:
one end of the first piezoresistor is electrically connected with a live wire of the commercial power, and the other end of the first piezoresistor is electrically connected with a zero line of the commercial power;
one end of the fuse is electrically connected with the zero line;
the second piezoresistor is electrically connected with the live wire at one end;
one end of the discharge tube group is electrically connected with the other end of the second piezoresistor, and the other end of the discharge tube group is grounded;
and one end of the third piezoresistor is electrically connected with the other end of the fuse, and the other end of the third piezoresistor is electrically connected with one end of the discharge tube group.
8. A wireless charging method of an electric vehicle is characterized in that the electric vehicle comprises an intelligent vehicle-mounted terminal and a power receiving device, the intelligent vehicle-mounted terminal is in wireless communication with the wireless charging device, and the power receiving device is in communication with the intelligent vehicle-mounted terminal through a vehicle-mounted bus, and the method comprises the following steps:
when the electric automobile has a wireless charging demand, the power receiving device sends a charging request to the wireless charging device through the intelligent vehicle-mounted terminal;
the wireless charging device establishes an energy transmission relation with the electric automobile according to the charging request and provides electric energy for the electric automobile based on the energy transmission relation;
wherein the power receiving device includes:
a first power transfer circuit to establish an energy transfer relationship with the wireless charging device;
the input end of the power receiving unit is electrically connected with the first power transmission circuit, and the output end of the power receiving unit is electrically connected with a power battery of the electric automobile;
the first controller is communicated with the intelligent vehicle-mounted terminal through the vehicle-mounted bus, and is used for sending a charging request to the wireless charging device through the intelligent vehicle-mounted terminal and controlling the power receiving unit so as to charge the electric energy transmitted by the wireless charging device and received by the first power transmission circuit to the power battery;
the power receiving unit comprises a rectifying circuit and a load throwing protection circuit which are sequentially and electrically connected, wherein the input end of the rectifying circuit is electrically connected with the first power transmission circuit, and the output end of the load throwing protection circuit is electrically connected with the power battery.
CN201910428805.9A 2019-05-22 2019-05-22 Electric automobile and wireless charging system and method thereof Active CN110182073B (en)

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CN201450329U (en) * 2009-06-17 2010-05-05 温永辉 Lightning protection device
US9446674B2 (en) * 2013-07-15 2016-09-20 Qualcomm Incorporated Systems, methods, and apparatus related to mutual detection and identification of electric vehicle and charging station
CN106685103B (en) * 2016-12-23 2020-07-28 中国人民解放军海军工程大学 Parameter setting method of L CC L resonance structure
CN106696738B (en) * 2016-12-28 2019-05-10 华为技术有限公司 A kind of wireless charging method of electric car, apparatus and system
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