CN108819748B - Wireless charging system of electric automobile - Google Patents
Wireless charging system of electric automobile Download PDFInfo
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- CN108819748B CN108819748B CN201810608307.8A CN201810608307A CN108819748B CN 108819748 B CN108819748 B CN 108819748B CN 201810608307 A CN201810608307 A CN 201810608307A CN 108819748 B CN108819748 B CN 108819748B
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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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- 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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
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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
- 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
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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
- 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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention relates to a wireless charging system of an electric automobile, which comprises: the system comprises an electric energy wireless transmitting subsystem and an electric energy wireless receiving subsystem; the electric energy wireless transmitting subsystem comprises a power supply, an electric energy transfer device and a transmitting coil; the electric energy wireless receiving subsystem comprises a receiving coil, an electric energy receiving device and a battery; the transmitting coil is arranged on the surface of the occupied area of the parking space or underground; the receiving coil is arranged on the side face of the electric automobile; the power supply transmits electric energy to the electric energy transmission device, the electric energy transmission device transmits the electric energy to the transmitting coil, the transmitting coil converts the electric energy into magnetic energy and transmits the magnetic energy, the receiving coil receives the magnetic energy and converts the magnetic energy into electric energy, the electric energy receiving device transmits the electric energy to the battery, and the battery acquires the electric energy to finish charging. The embodiment of the invention realizes the energy transfer process without electrical connection in a wireless mode, reduces the problems of mechanical abrasion, contact loss and the like of the system and facilitates the maintenance and operation of the system.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric automobiles, in particular to a wireless charging system for an electric automobile.
Background
The main reasons for the development of electric vehicles are the shortage of energy and the higher requirements of people on quality of life. The energy consumption of the automobile accounts for nearly one fourth of the total energy consumption of the world. And the number of automobiles is increasing continuously, thereby causing more serious energy and environmental problems.
The influence of the oil crisis leads developed countries to develop energy-saving technology first, and the energy consumption of industrial departments is kept at 50% of the total energy consumption. Due to the rapid development of transportation departments, the energy consumption of automobiles is far higher than that of other departments, and accounts for 24 percent of the total energy consumption. Conventional automobiles have a greater challenge because the exhaust gas contains harmful substances such as CO, HC and NOX, which are extremely harmful to humans and the environment. Before the world faces the dual crisis of energy and environment, the automobile industry is imperatively required to improve the energy use efficiency of automobiles so as to reduce pollutants. However, it is very difficult to solve this problem only by improving the performance of the diesel locomotive. Governments and automobile enterprises in various countries generally recognize that energy conservation and emission reduction are the main direction of automobile technology development in the future, and the development of electric automobiles is the best way for solving the two technical problems.
The power battery charging technology is used as a key technology for electric vehicle development, and plays a vital role in development and popularization of electric vehicles. Traditional electric automobile charging mode is for inserting electric formula, receives electric interface and fills electric pile quantity restriction, can only charge for one or several electric automobile in the same time. In addition, the installation is inserted electric formula and is filled electric pile and occupy extra place, and the land used contradiction makes the quantity of filling electric pile very limited, has restricted electric automobile's large tracts of land popularization.
On the other hand, a plurality of protection measures are comprehensively considered during the design of the solid plug-in type charging pile, but the exposed charging plug still has potential safety hazard, taking the direct current rapid charging pile as an example, when the direct current rapid charging pile works, the output voltage is up to hundreds of volts, the current is more than tens of amperes, and a specially-assigned person is required to use professional protective equipment to complete the charging process during charging; the exposed interface still must have waterproof, dustproof scheduling problem, and inevitable system's trouble takes place, brings a large amount of maintenance, maintenance work, further leads to inserting electric formula and fills electric pile's popularization and receive the restriction.
On the other hand, the plug-in charging piles exist independently, a complete system is not formed, total monitoring is not carried out for control, and troubleshooting is time-consuming and labor-consuming.
Disclosure of Invention
In order to solve the problems in the prior art, at least one embodiment of the present invention provides a wireless charging system for an electric vehicle.
To this end, an embodiment of the present invention provides an electric vehicle wireless charging system, where the system includes: the system comprises an electric energy wireless transmitting subsystem and an electric energy wireless receiving subsystem;
the electric energy wireless transmitting subsystem comprises a power supply, an electric energy transfer device and a transmitting coil; the electric energy wireless receiving subsystem comprises a receiving coil, an electric energy receiving device and a battery;
the transmitting coil is arranged on the surface of the area occupied by the parking space or underground; the receiving coil is arranged on the side face of the electric automobile;
the power supply transmits electric energy to the electric energy transmission device, the electric energy transmission device transmits the electric energy to the transmitting coil, the transmitting coil converts the electric energy into magnetic energy and transmits the magnetic energy, the receiving coil receives the magnetic energy and converts the magnetic energy into electric energy, the electric energy receiving device transmits the electric energy to the battery, and the battery acquires the electric energy to finish charging.
Optionally, the electric energy transfer device includes:
the circuit comprises an oscillator, an impedance matching circuit and a power amplifying circuit;
the oscillator generates oscillation current after acquiring the electric energy output by the power supply, the oscillation current enters the transmitting coil after sequentially passing through the impedance matching circuit and the power amplifying circuit, and the transmitting coil emits magnetic energy.
Optionally, the power receiving device includes:
the charging control circuit comprises a rectifying circuit, a filter circuit and a charging regulation circuit;
the receiving coil receives magnetic energy and converts the magnetic energy into electric energy and outputs oscillating current, the rectifying circuit outputs direct current after acquiring the oscillating current, the direct current enters the charging adjusting circuit after passing through the filter circuit, the charging adjusting circuit adjusts the direct current into the charging current of the battery and outputs the charging current according to preset charging voltage, and the battery acquires the charging current to finish charging.
Optionally, the power wireless receiving subsystem further includes: a detector and a first wireless communication module; the wireless power transmission subsystem further comprises: a controller and a second wireless communication module;
the detector acquires the direct current output by the filter circuit, the charging current and the charging voltage output by the charging adjusting circuit, generates detection information and sends the detection information through the first wireless communication module; the controller receives the detection information through the second wireless communication module and controls the oscillation frequency of the oscillator according to the detection information.
Optionally, the controlling, by the controller, the oscillation frequency of the oscillator according to the detection information includes:
the controller determines the direct current output by the filter circuit and the charging current output by the charging adjusting circuit according to the detection information, generates frequency control information according to the direct current and the charging current, and controls the oscillation frequency of the oscillator according to the frequency control information.
Optionally, the controller generates frequency control information according to the direct current and the charging current, including:
the controller calculates a difference between the direct current and the charging current, and takes the difference as the frequency control information.
Optionally, the controlling, by the controller, the oscillation frequency of the oscillator according to the frequency control information includes:
the controller judges whether the absolute value of the difference is larger than a preset threshold value, if so, judges whether the difference is larger than zero, if so, increases the oscillation frequency of the oscillator, and if not, decreases the oscillation frequency of the oscillator.
Optionally, the increasing, by the controller, the oscillation frequency of the oscillator includes: the controller increases the current oscillation frequency of the oscillator by a preset frequency;
the controller reducing the oscillation frequency of the oscillator includes: the controller reduces a current oscillation frequency of the oscillator by a preset frequency.
Optionally, the electric energy wireless transmission subsystem further includes: a soft switching circuit and a pressure sensor;
the soft switching circuit is arranged between the power supply and the oscillator, and the soft switching circuit and the pressure sensor are respectively connected with the controller;
the controller acquires data of the pressure sensor and judges whether a vehicle is parked in a parking space, if so, the controller sends a turn-on signal to the soft switch circuit, and if not, the controller sends a turn-off signal to the soft switch circuit; and after receiving the switching-on signal, the soft switching circuit is switched on at zero voltage or at zero current so as to enable the oscillator to obtain the electric energy output by the power supply.
Optionally, the electric energy wireless transmission subsystem further includes: monitoring equipment;
the controller is connected with the monitoring equipment;
the controller sends the detection information to the monitoring equipment, and the monitoring equipment determines the direct current output by the filter circuit and the charging current and the charging voltage output by the charging regulating circuit according to the detection information and displays the direct current, the charging current and the charging voltage.
Therefore, in at least one embodiment of the embodiments of the present invention, the energy transfer process without electrical connection is realized in a wireless manner, thereby reducing the occurrence of problems of mechanical wear, contact loss, and the like of the system, and facilitating the maintenance and operation of the system.
Further, through wireless mode, need not to occupy extra installation place, the user parks and can start the system and charge for the vehicle.
Further, compared with a plug-in charging mode, the monitoring equipment can monitor the states of all charging systems in a wireless mode and timely find out a fault system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of a wireless charging system for an electric vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In a first aspect, as shown in fig. 1, the present embodiment discloses a wireless charging system for an electric vehicle, where the system may include: a power wireless transmitting subsystem 1 and a power wireless receiving subsystem 2.
The wireless electric energy transmitting subsystem 1 comprises a power supply 11, an electric energy transfer device 12 and a transmitting coil 13; the power wireless receiving subsystem 2 includes a receiving coil 14, a power receiving device 15, and a battery 16.
The transmitting coil 13 is arranged on the surface of the occupied area of the parking space or underground; the receiving coil 14 is disposed on the side of the electric vehicle.
The charging process is described as follows:
the power supply 11 transmits electric energy to the electric energy transmission device 12, the electric energy transmission device 12 transmits the electric energy to the transmitting coil 13, the transmitting coil 13 converts the electric energy into magnetic energy and transmits the magnetic energy, the receiving coil 14 receives the magnetic energy and converts the magnetic energy into electric energy, the electric energy receiving device 15 transmits the electric energy to the battery 16, and the battery 16 obtains the electric energy to finish charging.
In this embodiment, the power supply 11 may obtain electric energy from the power grid and output the electric energy, and the power supply 11 and the electric energy transmission device 12 may be disposed under the ground of the occupied area of the parking space, without occupying an additional place.
In the present embodiment, the power receiving device 15 and the battery 16 are provided inside the electric vehicle.
Therefore, the wireless charging system for the electric automobile disclosed in the embodiment realizes the energy transfer process without electrical connection in a wireless mode, reduces the occurrence of the problems of mechanical abrasion, contact loss and the like of the system, and facilitates the maintenance and operation of the system.
Further, through wireless mode, need not to occupy extra installation place, the user parks and can start the system and charge for the vehicle.
In one particular example, the electrical energy transfer device 12 includes: the circuit comprises an oscillator, an impedance matching circuit and a power amplifying circuit.
In this embodiment, the oscillator generates an oscillating current after obtaining the electric energy output by the power supply 11, the oscillating current sequentially passes through the impedance matching circuit and the power amplifying circuit and then enters the transmitting coil 13, and the transmitting coil 13 emits magnetic energy.
In this embodiment, the oscillation current generated by the oscillator is a high-frequency oscillation current, and the oscillator, the impedance matching circuit, and the power amplifying circuit can all use the existing circuits, which is not described in detail in this embodiment.
In this embodiment, after the oscillating current enters the transmitting coil 13, a non-radiative magnetic field is formed around the transmitting coil 13, so as to convert the electric energy into magnetic energy.
Based on the above example, in the present embodiment, the power receiving device 15 includes: rectifier circuit, filter circuit and charge regulating circuit.
In this embodiment, the receiving coil 14 receives magnetic energy and converts the magnetic energy into electric energy and outputs an oscillating current, the rectifying circuit obtains the oscillating current and outputs a direct current, the direct current passes through the filter circuit and then enters the charging regulating circuit, the charging regulating circuit regulates the direct current into a charging current of the battery 16 and outputs the charging current according to a preset charging voltage, and the battery 16 obtains the charging current to complete charging.
In this embodiment, when the natural frequency of the receiving coil 14 is the same as the frequency of the received electromagnetic wave, the oscillating current output by the receiving coil 14 is the strongest, so as to realize the conversion from magnetic energy to electric energy.
In this embodiment, the rectifying circuit and the filtering circuit may use the existing circuit, and this embodiment is not described again.
In this embodiment, the function of the charging adjustment circuit is to realize constant-voltage and constant-current output, and satisfy the charging current and the charging voltage of the battery 16, and the specific implementation of the charging adjustment circuit may adopt various ways as long as the above functions can be realized, and the details of this embodiment are not repeated.
Based on the above example, in this embodiment, the power wireless receiving subsystem 2 further includes: a detector and a first wireless communication module; the electric energy wireless transmission subsystem 1 further comprises: a controller and a second wireless communication module.
In this embodiment, the detector obtains the dc current output by the filter circuit and the charging current and charging voltage output by the charging adjustment circuit, generates detection information, and sends the detection information through the first wireless communication module; the controller receives the detection information through the second wireless communication module and controls the oscillation frequency of the oscillator according to the detection information.
In this embodiment, the detector of the wireless power receiving subsystem 2 feeds back the detection information, so that the controller of the wireless power transmitting subsystem 1 can control the oscillation frequency of the oscillator, thereby reducing the workload of the charging adjustment circuit.
Based on the above example, in this embodiment, the controller controls the oscillation frequency of the oscillator according to the detection information, which is specifically described as follows:
the controller determines the direct current output by the filter circuit and the charging current output by the charging regulating circuit according to the detection information, generates frequency control information according to the direct current and the charging current, and controls the oscillation frequency of the oscillator according to the frequency control information.
Based on the above example, in this embodiment, the controller generates the frequency control information according to the dc current and the charging current, which is specifically described as follows:
the controller calculates a difference between the direct current and the charging current, and uses the difference as frequency control information.
Based on the above example, in this embodiment, the controller controls the oscillation frequency of the oscillator according to the frequency control information, which is specifically described as follows:
the controller judges whether the absolute value of the difference is larger than a preset threshold value, if so, judges whether the difference is larger than zero, if so, increases the oscillation frequency of the oscillator, and if not, decreases the oscillation frequency of the oscillator.
In this embodiment, if the controller determines that the absolute value of the difference is not greater than the preset threshold, the oscillation frequency of the oscillator is not changed.
Based on the above example, in the present embodiment, the controller increasing the oscillation frequency of the oscillator includes: the controller increases the current oscillation frequency of the oscillator by a preset frequency.
The controller reducing the oscillation frequency of the oscillator includes: the controller decreases the current oscillation frequency of the oscillator by a preset frequency.
In this embodiment, the preset frequency may be determined according to an actual situation, and a specific value of the preset frequency is not limited herein.
In a specific example, the power wireless transmission subsystem 1 may further include: soft switching circuits and pressure sensors.
In this embodiment, the soft switching circuit is disposed between the power supply 11 and the oscillator, and the soft switching circuit and the pressure sensor are respectively connected to the controller.
In the embodiment, the controller acquires data of the pressure sensor and judges whether a vehicle is parked in the parking space, if so, the controller sends a turn-on signal to the soft switching circuit, and if not, the controller sends a turn-off signal to the soft switching circuit; the soft switching circuit is switched on at zero voltage or at zero current after receiving the switching-on signal, so that the oscillator obtains the electric energy output by the power supply 11.
In this embodiment, the soft switching circuit can use the existing circuit, and is not described herein again.
In this embodiment, the soft switching circuit is adopted, and the power loss is close to zero, so that not only is the transmission efficiency of the system improved, but also the heating and electromagnetic interference of the soft switching circuit are reduced.
In a specific example, the power wireless transmission subsystem 1 may further include: and (5) monitoring equipment.
In this embodiment, the controller is connected to the monitoring device.
In this embodiment, the controller sends the detection information to the monitoring device, and the monitoring device determines the dc current output by the filter circuit and the charging current and charging voltage output by the charging adjustment circuit according to the detection information, and displays the dc current, the charging current, and the charging voltage.
In this embodiment, the controller and the monitoring device are connected by a wired connection, such as an RS485 communication line or an RS232 communication line.
In this embodiment, the staff accessible supervisory equipment sees data directly perceivedly, makes things convenient for staff's management, statistics and troubleshooting.
Therefore, compared with a plug-in charging mode, the wireless charging system for the electric automobile disclosed by the embodiment can monitor the states of all charging systems in a wireless mode, and can find out fault systems in time.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (5)
1. A wireless charging system for an electric vehicle, the system comprising: the system comprises an electric energy wireless transmitting subsystem and an electric energy wireless receiving subsystem;
the electric energy wireless transmitting subsystem comprises a power supply, an electric energy transfer device and a transmitting coil; the electric energy wireless receiving subsystem comprises a receiving coil, an electric energy receiving device and a battery;
the transmitting coil is arranged on the surface of the area occupied by the parking space or underground; the receiving coil is arranged on the side face of the electric automobile;
the power supply transmits electric energy to the electric energy transmission device, the electric energy transmission device transmits the electric energy to the transmitting coil, the transmitting coil converts the electric energy into magnetic energy and transmits the magnetic energy, the receiving coil receives the magnetic energy and converts the magnetic energy into electric energy, the electric energy receiving device transmits the electric energy to the battery, and the battery acquires the electric energy to finish charging;
the electric energy transfer device comprises an oscillator, an impedance matching circuit and a power amplifying circuit; the oscillator generates oscillation current after acquiring the electric energy output by the power supply, the oscillation current enters the transmitting coil after sequentially passing through the impedance matching circuit and the power amplifying circuit, and the transmitting coil emits magnetic energy;
the electric energy receiving device comprises a rectifying circuit, a filter circuit and a charging adjusting circuit; the receiving coil receives magnetic energy and converts the magnetic energy into electric energy and outputs oscillating current, the rectifying circuit outputs direct current after acquiring the oscillating current, the direct current enters the charging adjusting circuit after passing through the filter circuit, the charging adjusting circuit adjusts the direct current into the charging current of the battery and outputs the charging current according to preset charging voltage, and the battery acquires the charging current to finish charging;
the power wireless receiving subsystem further comprises: a detector and a first wireless communication module; the wireless power transmission subsystem further comprises: a controller and a second wireless communication module; the detector acquires the direct current output by the filter circuit, the charging current and the charging voltage output by the charging adjusting circuit, generates detection information and sends the detection information through the first wireless communication module; the controller receives the detection information through the second wireless communication module and controls the oscillation frequency of the oscillator according to the detection information;
the controller controls the oscillation frequency of the oscillator according to the detection information, and includes: the controller determines the direct current output by the filter circuit and the charging current output by the charging regulating circuit according to the detection information, generates frequency control information according to the direct current and the charging current, and controls the oscillation frequency of the oscillator according to the frequency control information;
the controller generates frequency control information according to the direct current and the charging current, and the frequency control information comprises: the controller calculates a difference between the direct current and the charging current, and takes the difference as the frequency control information.
2. The system of claim 1, wherein the controller controls the oscillation frequency of the oscillator according to the frequency control information, comprising:
the controller judges whether the absolute value of the difference is larger than a preset threshold value, if so, judges whether the difference is larger than zero, if so, increases the oscillation frequency of the oscillator, and if not, decreases the oscillation frequency of the oscillator.
3. The system of claim 2, wherein the controller increasing the oscillation frequency of the oscillator comprises:
the controller increases the current oscillation frequency of the oscillator by a preset frequency;
the controller reducing the oscillation frequency of the oscillator includes: the controller reduces a current oscillation frequency of the oscillator by a preset frequency.
4. The system of claim 1, wherein the wireless power transmission subsystem further comprises:
a soft switching circuit and a pressure sensor;
the soft switching circuit is arranged between the power supply and the oscillator, and the soft switching circuit and the pressure sensor are respectively connected with the controller;
the controller acquires data of the pressure sensor and judges whether a vehicle is parked in a parking space, if so, the controller sends a turn-on signal to the soft switch circuit, and if not, the controller sends a turn-off signal to the soft switch circuit; and after receiving the switching-on signal, the soft switching circuit is switched on at zero voltage or at zero current so as to enable the oscillator to obtain the electric energy output by the power supply.
5. The system of claim 1, wherein the wireless power transmission subsystem further comprises:
monitoring equipment;
the controller is connected with the monitoring equipment;
the controller sends the detection information to the monitoring equipment, and the monitoring equipment determines the direct current output by the filter circuit and the charging current and the charging voltage output by the charging regulating circuit according to the detection information and displays the direct current, the charging current and the charging voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810608307.8A CN108819748B (en) | 2018-06-13 | 2018-06-13 | Wireless charging system of electric automobile |
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| CN201810608307.8A CN108819748B (en) | 2018-06-13 | 2018-06-13 | Wireless charging system of electric automobile |
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| CN108819748B true CN108819748B (en) | 2021-02-02 |
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| CN109334480A (en) * | 2018-11-22 | 2019-02-15 | 国网江苏省电力有限公司南通供电分公司 | A kind of wireless charging system for electric automobile and its charging method |
| CN109649193A (en) * | 2018-12-17 | 2019-04-19 | 华人运通控股有限公司 | Charging system and charging method |
| CN111823892A (en) * | 2020-07-21 | 2020-10-27 | 长安大学 | Automatic switch device for wireless charging coil of electric automobile and control method |
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| JP6379660B2 (en) * | 2013-06-27 | 2018-08-29 | Tdk株式会社 | Wireless power receiving apparatus and wireless power transmission apparatus |
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| CN108473066A (en) * | 2015-12-28 | 2018-08-31 | 日本电产株式会社 | Movable body system |
| CN106936225B (en) * | 2015-12-31 | 2020-03-27 | 中惠创智无线供电技术有限公司 | Positioning system and method for wireless charging of electric automobile |
| CN106143193A (en) * | 2016-07-08 | 2016-11-23 | 广州兴国新能源科技有限公司 | A kind of electric automobile wireless power transmission charging pile |
| CN106374634A (en) * | 2016-09-27 | 2017-02-01 | 哈尔滨理工大学 | Novel electric vehicle wireless charging apparatus |
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| JP2012044762A (en) * | 2010-08-18 | 2012-03-01 | Showa Aircraft Ind Co Ltd | Non-contact power feeder with overvoltage protection |
| CN106394270A (en) * | 2015-07-27 | 2017-02-15 | 福特全球技术公司 | Inductive power transfer voltage control method |
| CN105109358A (en) * | 2015-09-22 | 2015-12-02 | 奇瑞汽车股份有限公司 | Wireless charging system of electric automobile |
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