CN108528253B - Car wireless charging device based on magnetic coupling resonance technology - Google Patents
Car wireless charging device based on magnetic coupling resonance technology Download PDFInfo
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- CN108528253B CN108528253B CN201810392936.1A CN201810392936A CN108528253B CN 108528253 B CN108528253 B CN 108528253B CN 201810392936 A CN201810392936 A CN 201810392936A CN 108528253 B CN108528253 B CN 108528253B
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- 230000002708 enhancing effect Effects 0.000 claims abstract description 51
- 230000035699 permeability Effects 0.000 claims description 38
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000007769 metal material Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- SAZUGELZHZOXHB-UHFFFAOYSA-N acecarbromal Chemical compound CCC(Br)(CC)C(=O)NC(=O)NC(C)=O SAZUGELZHZOXHB-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Classifications
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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
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- H02J5/005—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H02J7/025—
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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
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a wireless charging device of car based on magnetic coupling resonance technique, wireless charging device include wireless power transmitting device, wireless power receiving arrangement, main control cabinet, vice control cabinet, external power supply, and wireless power transmitting device includes: the transmitting circuit is positioned in the wireless electric energy transmitting device and connected with the transmitting coil; the main console is connected with an external power supply; the wireless power receiving device comprises a storage battery, a receiving coil and a charging circuit, wherein the storage battery is positioned in the wireless power receiving device, the receiving coil is positioned in the center of the storage battery, and the charging circuit is positioned in the wireless power receiving device and is used for connecting the storage battery and the receiving coil; the wireless charging device further comprises a medium magnetic conductivity enhancing device, the medium magnetic conductivity enhancing device is arranged inside the receiving coil, and the medium magnetic conductivity enhancing device is used for enhancing the magnetic conductivity of a medium between the transmitting coil and the receiving coil.
Description
Technical Field
The invention relates to the technical field of wireless power transmission, in particular to an automobile wireless charging device based on a magnetic coupling resonance technology.
Background
At present, electric automobiles mainly use wired charging as a main part, charging power of charging piles is often designed to be very large in order to meet requirements of charging time, and lines connected with the automobiles through the charging piles have very large current flowing, so that great potential safety hazards exist for operators. The charging wire and the automobile are connected in a plugging mode, so that the charging flexibility of the electric automobile is limited, sparks or poor contact can be generated in the plugging process due to the connection, the potential charging time is prolonged, and the charging efficiency of the system is reduced. The charging wire is exposed in the air for a long time and needs to be regularly detected for safety performance, so that the equipment maintenance cost is increased, and meanwhile, the damage to passers-by is possibly caused.
The electromagnetic coupling resonance type wireless power transmission technology utilizes an electromagnetic resonance coupling principle, so that the power transmission technology can still obtain larger transmission power and higher transmission efficiency when transmitting electric power at a medium distance, and is hardly interfered by a non-magnetic space obstacle in the transmission process. The performance of the magnetic coupling resonance type wireless power transmission technology in terms of transmission distance, transmission power and transmission efficiency is balanced, so that the magnetic coupling resonance type wireless power transmission technology is particularly suitable for being applied to the field of wireless charging of electric automobiles.
The wired charging mode has the problems of easy abrasion, easy generation of electric sparks, insufficient safety and the like, and the wireless charging perfectly solves the defects of wired charging due to the characteristics of flexible and safe power supply, convenient power taking and no electric connection, and can effectively promote the large-scale popularization and application of the electric automobile. Although the magnetic coupling resonant wireless charging technology has many advantages, the problem of low efficiency compared with wired charging restricts the popularization and application of the technology, and also brings challenges to research and development personnel.
Therefore, there is a need for a wireless charging device for an automobile, which can improve charging efficiency.
Disclosure of Invention
The application provides a wireless charging device of car based on magnetic coupling resonance technique can improve wireless charging efficiency.
In a first aspect, a magnetic coupling resonance technology-based wireless charging device for an automobile is provided, the wireless charging device includes a wireless power transmitting device, a wireless power receiving device, a main console, a secondary console, and an external power source, wherein the wireless power transmitting device includes: the wireless power transmitting device comprises a transmitting coil and a transmitting circuit, wherein the transmitting circuit is positioned inside the wireless power transmitting device and is connected with the transmitting coil; the main console is connected with the external power supply; the wireless power receiving device comprises a storage battery, a receiving coil and a charging circuit, wherein the storage battery is positioned inside the wireless power receiving device, the receiving coil is positioned in the center of the storage battery, and the charging circuit is positioned inside the wireless power receiving device and is used for connecting the storage battery and the receiving coil; the wireless charging device further comprises a medium magnetic conductivity enhancing device, the medium magnetic conductivity enhancing device is arranged inside the receiving coil, and the medium magnetic conductivity enhancing device is used for enhancing the magnetic conductivity of a medium between the transmitting coil and the receiving coil.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the medium permeability enhancing device may be one of the following materials: solid high-permeability non-metallic materials, gaseous high-permeability non-metallic materials, and liquid high-permeability non-metallic materials.
With reference to the first aspect and the foregoing implementation manner, in a second possible implementation manner of the first aspect, the medium permeability enhancing device is disposed inside the receiving coil, and a connection device is disposed inside the medium permeability enhancing device and is used for extending and contracting the medium permeability enhancing device.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the connection device is configured to enable the medium permeability enhancement device to extend and contract between the receiving coil and the transmitting coil.
With reference to the first aspect and the foregoing implementation manner, in a fourth possible implementation manner of the first aspect, the main console is disposed outside the wireless power transmitting device, and is used for overall machine control, fault detection, emergency power off, and a power switch, a start-stop control button and an emergency power off button are disposed on the main console, and the main console further includes a display screen, where the display screen is used to display relevant parameters of voltage, current, and the like of real-time power transmission and a working state of the wireless power transmitting device.
With reference to the first aspect and the foregoing implementation manner, in a fifth possible implementation manner of the first aspect, the secondary console is used for fault detection, fault notification, automatic power off, and control of the medium permeability enhancing device, a start-stop control button and an emergency stop charging button of the medium permeability enhancing device are arranged on the secondary console, a display screen is arranged on a surface of the secondary console, and the display screen is used for displaying battery power, a working state of the wireless power receiving device, and a state of the medium permeability enhancing device.
Therefore, the wireless charging device can be used for solving the problems of low efficiency and low speed of wireless charging of the automobile, and meanwhile, the problem that the device is convenient to carry on the automobile is solved, the operation is convenient, and the high-power wireless charging efficiency is improved.
Drawings
Fig. 1 is a schematic diagram of a wireless charging device for a vehicle according to an embodiment of the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
Specifically, the reference numerals in fig. 1 are explained as follows: 1-receiving coil, 2-transmitting coil, 3-medium magnetic conductivity enhancing device, 4-auxiliary control console, 5-main control console, 6-accumulator.
As shown in fig. 1, the wireless charging device includes a wireless power transmitting device, a wireless power receiving device, a main console (5), a sub console (4), and an external power source, wherein the wireless power transmitting device includes: the wireless power transmitting device comprises a transmitting coil (2) and a transmitting circuit, wherein the transmitting circuit is positioned in the wireless power transmitting device and is connected with the transmitting coil;
the main console (5) is connected with the external power supply;
the wireless power receiving device comprises a storage battery (6), a receiving coil (1) and a charging circuit, wherein the storage battery (6) is positioned inside the wireless power receiving device, the receiving coil (1) is positioned in the center of the storage battery (6), and the charging circuit is positioned inside the wireless power receiving device and is used for connecting the storage battery (6) and the receiving coil (1);
the wireless charging device further comprises a medium magnetic permeability enhancing device (3), the medium magnetic permeability enhancing device (3) is arranged inside the receiving coil (1), and the medium magnetic permeability enhancing device (3) is used for enhancing the magnetic permeability of a medium between the transmitting coil (2) and the receiving coil (1).
That is to say, the wireless power transmitting device comprises a wireless power transmitting device, a transmitting coil (2) arranged at the central position in the wireless power transmitting device, a transmitting circuit arranged in the wireless power transmitting device and connected with the transmitting coil (2), the transmitting circuit is connected with a main console (5) arranged outside the wireless power transmitting device, the main console (5) is connected with an external power supply, the wireless power receiving device comprises a storage battery (6) arranged in the wireless power receiving device, a receiving coil (1) arranged in the wireless power receiving device and positioned at the center of the storage battery (6), a charging circuit arranged in the wireless power receiving device and connected with the storage battery (6) and the receiving coil (1), a medium magnetic permeability enhancing device (3) arranged in the receiving coil (1) and used for enhancing the magnetic permeability of a medium between the transmitting coil (2) and the receiving coil (1), Reduce the emission of magnetic flux, and also comprises a secondary console (4) arranged in the automobile. The problem that the wireless charging efficiency of car is low, the speed is slow is solved in the realization, has solved the problem that realizes that the device is convenient for the car to carry simultaneously, and convenient operation improves high-power wireless charging efficiency.
Optionally, as an embodiment of the present application, the medium permeability enhancing device may be one of the following materials: solid high-permeability non-metallic materials, gaseous high-permeability non-metallic materials, and liquid high-permeability non-metallic materials.
That is, the medium magnetic permeability enhancing device (3) arranged in the receiving coil (1) can be a solid non-metal material with high magnetic permeability, and can also be a gas-state and liquid-state non-metal material generator with high magnetic permeability, which is used for enhancing the concentration of the gas-state and liquid-state non-metal materials with high magnetic permeability in the internal space of the device, so that the medium magnetic permeability in the device is enhanced, the electric energy transmission efficiency is improved, and the selection of the materials is more flexible.
Optionally, as an embodiment of the present application, the medium permeability enhancing apparatus is disposed inside the receiving coil, and a connecting apparatus is disposed inside the medium permeability enhancing apparatus, and the connecting apparatus is used for extending and contracting the medium permeability enhancing apparatus.
In other words, the connecting device (31) arranged on the magnetic permeability enhancing device is used for extending and contracting the medium magnetic permeability enhancing device (3), so that the magnetic permeability enhancing device can be more flexibly and conveniently stored and released.
Optionally, as an embodiment of the present application, the connecting device is configured to enable the medium permeability enhancing device to be stretched and contracted between the receiving coil and the transmitting coil.
Namely, the expansion range of the medium magnetic permeability enhancing device (3) is between the receiving coil (1) and the transmitting coil (2).
Optionally, as an embodiment of this application, the main control console set up in the wireless power transmitting device outside, the main control console is used for complete machine control, fault detection, emergency power off, switch, sets up on the main control console and opens and stop control button and emergency power off button, sets up still including the display screen on the main control console, the display screen is used for showing relevant parameters such as voltage, electric current of real-time electric energy transmission and wireless power transmitting device's operating condition.
That is to say, set up in main control cabinet (5) in the wireless power transmitting device outside for whole quick-witted control, fault detection, emergency power-off, switch, set up on main control cabinet (5) and open and stop control button and emergency power-off button, set up the display screen in addition on main control cabinet (5), be used for showing real-time power transmission's voltage, the demonstration and wireless power transmitting device operating condition etc. of relevant parameters such as electric current, the security when having improved wireless charging has promoted user's convenience simultaneously.
Optionally, as an embodiment of the present application, the secondary console is used for fault detection, fault notification, automatic power off, and controlling the dielectric permeability enhancing device, the secondary console is provided with a start-stop control button and an emergency stop charging button of the dielectric permeability enhancing device, the secondary console is provided with a display screen on a surface, and the display screen is used for displaying battery capacity, a working state of the wireless power receiving device, and a state of the dielectric permeability enhancing device.
That is to say, the auxiliary console (4) arranged in the automobile is used for fault detection, fault reminding, automatic power off and control of the medium permeability enhancing device (3), the medium permeability enhancing device (3) start-stop control button and the emergency stop charging button are arranged on the auxiliary console (4), and the display screen arranged on the surface of the auxiliary console (4) is used for displaying the battery capacity, the working state of the wireless energy receiving device and the state of the medium permeability enhancing device (3). The user can use the product more safely, more intuitively and more conveniently.
Therefore, the wireless charging device can be used for solving the problems of low efficiency and low speed of wireless charging of the automobile, and meanwhile, the problem that the device is convenient to carry on the automobile is solved, the operation is convenient, and the high-power wireless charging efficiency is improved.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a second device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The wireless charging device for the automobile based on the magnetic coupling resonance technology is characterized by comprising a wireless power transmitting device, a wireless power receiving device, a main control console, an auxiliary control console and an external power supply, wherein the wireless power transmitting device comprises: the wireless power transmitting device comprises a transmitting coil and a transmitting circuit, wherein the transmitting circuit is positioned inside the wireless power transmitting device and is connected with the transmitting coil;
the main console is connected with the external power supply;
the wireless power receiving device comprises a storage battery, a receiving coil and a charging circuit, wherein the storage battery is positioned inside the wireless power receiving device, the receiving coil is positioned in the center of the storage battery, and the charging circuit is positioned inside the wireless power receiving device and is used for connecting the storage battery and the receiving coil;
the wireless charging device also comprises a medium magnetic conductivity enhancing device, the medium magnetic conductivity enhancing device is arranged in the receiving coil, and the medium magnetic conductivity enhancing device is used for enhancing the magnetic conductivity of a medium between the transmitting coil and the receiving coil;
wherein, the medium magnetic conductivity enhancing device can be one of the following materials: solid high-permeability non-metallic materials, gaseous high-permeability non-metallic materials and liquid high-permeability non-metallic materials;
the medium magnetic conductivity enhancing device is arranged at the inner side of the receiving coil, a connecting device is arranged in the medium magnetic conductivity enhancing device, and the connecting device is used for stretching and contracting the medium magnetic conductivity enhancing device;
the connecting device is used for enabling the medium magnetic permeability enhancing device to stretch and contract between the receiving coil and the transmitting coil.
2. The wireless charging device of claim 1, wherein the main console is disposed outside the wireless power transmitting device, and is used for overall machine control, fault detection, emergency power off, and power switch, and a start-stop control button and an emergency power off button are disposed on the main console, and the wireless charging device further comprises a display screen disposed on the main console, and the display screen is used for displaying voltage and current parameters of real-time power transmission and a working state of the wireless power transmitting device.
3. The wireless charging device of claim 1, wherein the secondary console disposed inside the vehicle is configured to detect a fault, remind a fault, automatically power off, and control the dielectric permeability enhancing device, a start-stop control button and an emergency stop charging button of the dielectric permeability enhancing device are disposed on the secondary console, and a display screen is disposed on a surface of the secondary console, and the display screen is configured to display battery capacity, an operating state of the wireless power receiving device, and a state of the dielectric permeability enhancing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392936.1A CN108528253B (en) | 2018-04-27 | 2018-04-27 | Car wireless charging device based on magnetic coupling resonance technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392936.1A CN108528253B (en) | 2018-04-27 | 2018-04-27 | Car wireless charging device based on magnetic coupling resonance technology |
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| Publication Number | Publication Date |
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| CN108528253A CN108528253A (en) | 2018-09-14 |
| CN108528253B true CN108528253B (en) | 2021-06-29 |
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| CN201810392936.1A Active CN108528253B (en) | 2018-04-27 | 2018-04-27 | Car wireless charging device based on magnetic coupling resonance technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202602382U (en) * | 2012-05-03 | 2012-12-12 | 苏州强芯电子有限公司 | Wireless electric energy transmitting system |
| CN105305644A (en) * | 2015-07-06 | 2016-02-03 | 上海交通大学 | Long-distance wireless transmission device with controllable transmission range |
| KR102441822B1 (en) * | 2015-08-10 | 2022-09-13 | 주식회사 아모센스 | wireless charging transmission module for car |
| CN205004794U (en) * | 2015-09-25 | 2016-01-27 | 南昌理工学院 | Magnetic coupling wireless power transmission charging device |
| CN106921219A (en) * | 2015-12-28 | 2017-07-04 | 刘跃进 | A kind of magnetic conductivity for new-energy automobile wireless charging strengthens technology and method |
| CN205573657U (en) * | 2016-02-22 | 2016-09-14 | 中兴新能源汽车有限责任公司 | Drive assembly and car |
| CN106451822A (en) * | 2016-12-13 | 2017-02-22 | 北京理工大学 | Wireless energy transmission intelligent charging device |
| CN106972600A (en) * | 2017-05-25 | 2017-07-21 | 南京农业大学 | A kind of automobile wireless charging device with magnetic focusing coil |
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