CN207458744U - A kind of Wireless charging coil and wireless charging system - Google Patents
A kind of Wireless charging coil and wireless charging system Download PDFInfo
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- CN207458744U CN207458744U CN201721635869.9U CN201721635869U CN207458744U CN 207458744 U CN207458744 U CN 207458744U CN 201721635869 U CN201721635869 U CN 201721635869U CN 207458744 U CN207458744 U CN 207458744U
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- coil
- wireless charging
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- plate
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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
Abstract
The utility model discloses a kind of Wireless charging coil and wireless charging system for electric vehicle, which includes the transmitting coil Tx of symmetrical configuration and receiving coil Rx two parts.Transmitting coil module includes the coil layer for transmitting, poly- magnet-wire dish structure, the magnetics substrate layer of transmitting coil and the magnetic masking layer of transmitting coil of transmitting coil.Similary receiving coil also includes the coil layer for reception, poly- magnet-wire dish structure, the magnetics substrate layer of receiving coil and the magnetic masking layer of receiving coil of receiving coil.Two coils use symmetrical structure, it can be exchanged completely for the transmitting end-coil Tx on wireless ground with installing the receiving coil Rx of vehicle-mounted end, the magnetic coupling degree of symmetric coil structure is higher simultaneously, it can ensure the high efficiency of electric energy transmission, advantages of good shielding performance simultaneously, it is simple secured, it is adapted to electric vehicle wireless charging field.
Description
Technical field
The utility model is related to the wireless charging technical fields of electric vehicle, and in particular to increase poly- magnet-wire in a kind of coil
The wireless charging electric wire coil structures and wireless charging system of disk and magnetic masking layer.
Background technology
Electric vehicle energy-storage system is usually directly accessed by 220V alternating currents or is charged by battery charger.
It realizes the cable and its connector for requiring connect to power charge station.There is inconvenience in practical operation, simultaneously as
Contact its security that charges is low, for environmental requirement height.Electric vehicle wireless charging is by a transmitting coil Tx and reception
The device of coil Rx compositions charges come the battery to electric vehicle.Transmitting coil Tx is connected to parking stall charging station, receives
Coil Rx is fixed on automobile chassis.Since the connection of physical circuit is not required in it, compared to wired charging system
With higher safety coefficient.Not it is outer can by provided underground transmitting coil, electric vehicle wireless charging can in parking lot or
Person can realize the charge requirement for electric vehicle on road.
The method that existing wireless charging mainly uses at present is transmitted by a pair of of coupling coil, common coil
Structure has circular coil, square coil, the oval structures such as coil and solenoid type coil.It is asked existing for existing loop construction
The problems such as topic is that transmission efficiency is low, and mutual behaviour's property of two coils is poor and big in the prevalence of leakage field, and degree of coupling is low.Simultaneously mostly
Number loop constructions using being circular litz wire, caused since circular litz wire internal resistance is larger system generate heat when electric energy transmit greatly and
The problem of influencing wireless power transmission efficiency.
For the transmitting coil and receiving coil of wireless charging system for electric automobile, terminal user it is expected that loop construction can be with
It realizes and exchanges interoperability, while require to realize that the efficiency of wireless power transmission maximizes.One kind provided by the utility model as a result,
For the Wireless charging coil of electric vehicle to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of reduction system leakage field, improve system efficiency of transmission, can be completely real
The Wireless charging coil and wireless charging system of the exchange interoperability of existing coil.
The purpose of this utility model can be realized by following technical solution：
A kind of Wireless charging coil, including fixed poly- magnet-wire disk, coil, magnetics substrate and shielded layer successively；The poly- magnetic
Drum includes insulated substrate and thin plate ferrite；The insulated substrate be equipped with it is spaced around line groove and separation guide,
In line groove, the thin plate ferrite is embedded in separation guide the coil winding.
Further, it is described around line groove be " returning " character form structure, rectangular cross-section, the coil and described around line groove
Shape, size matching.
Further, the coil is made of rectangle litz wire.
Further, the thin plate ferrite be strip, the separation guide rectangular cross-section.
Further, the magnetics substrate includes bottom plate, ferrite-plate and lower face plate, the bottom plate covering coil and poly- magnetic
Drum upper surface, plays seal protection；The bottom plate surrounding make lip structure make its be integrally formed groove for install put
The ferrite-plate is put, the lower face plate covers the ferrite-plate.
Further, the ferrite-plate in the magnetics substrate is spliced to form by the lamellar ferrite of polylith.
Further, the shielded layer has the aluminium sheet of flange for four sidebands, and the aluminium sheet wraps up magnetic-collecting board and magnetics substrate
Inside.
A kind of wireless charging system, including transmitting coil and receiving coil, before the transmitting coil and receiving coil use
Wireless charging electric wire coil structures are stated, the transmitting coil is identical with receiving coil structure and performance parameter, is used interchangeably.
The beneficial effects of the utility model are：The structure of poly- magnet-wire disk is simple, facilitates processing, and coil installation is easy to make,
The dispersion loss at coil back can be effectively reduced, there is preferable magnetic field shielding effect, reduces coil electromagnetism coupling leakage field
The influence for caused by coil surrounding devices makes the stray field that vehicle-mounted end receiving coil generates there are one relatively low value, therefore subtracts
Few receiving coil leakage field magnetic field is influenced for the heat that body of a motor car generates.
Transmitting coil and receiving coil symmetrical configuration, structure and performance parameter are identical, are used interchangeably, when mounted
Coiler part need not separate mark, be used interchangeably completely, so as to simplify production and reduce system cost.
Since coil is using rectangle litz wire, the upper surface of coil is a plane, so ensures coil and magnetics substrate
Between there is no big gap situation, transmitting coil and the effective mutual inductance distance of receiving coil are increased to, so as to solve electric vehicle
Chassis excessively high the problem of causing radio transmission efficiency low.
Description of the drawings
Fig. 1 is wireless charging system for electric automobile schematic diagram.
Fig. 2 is wireless charging system charging principle figure.
Fig. 3 is the transmitting coil of the utility model symmetrical structure and receiving coil schematic diagram.
Fig. 4 is the explosion installation diagram of wireless charging electric wire coil structures；
Fig. 5 a are poly- magnet-wire disk top view；
Fig. 5 b are poly- magnet-wire disk sectional view；
Fig. 5 c are poly- magnet-wire disk operation principle schematic diagram.
Fig. 6 is rectangle litz wire schematic diagram.
Fig. 7 is the utility model magnetics substrate ferrite arrangement schematic diagram.
Fig. 8 is the utility model Wireless charging coil structure sectional view.
Fig. 9 a are the schematic diagram that the shielding aluminium sheet of four side flange is not used to generate magnetic field after coil energization；
Fig. 9 b are the schematic diagram that the utility model generates magnetic field using the shielding aluminium sheet of four side flange after coil energization.
Figure 10 is loop construction schematic diagram.
Specific embodiment
In order to more specifically be described to the loop construction of the utility model, below in conjunction with the accompanying drawings and specific embodiment pair
It is described in detail in a kind of technical solution of the Wireless charging coil for electric vehicle.
It is the wireless charging system of electric vehicle symmetric coil structure shown in Fig. 1.The system is by charging station 2 and induction coil
Composition.Induction coil includes transmitting coil 3 and receiving coil 4, its main feature is that 4 symmetrical configuration of transmitting coil 3 and receiving coil,
Coiler part need not separate mark during installation, and the performance parameter at both ends is identical.Transmitting coil 3 and charging station 2 are in ground surface end
It is connected；Receiving coil is mounted on 5 body bottom of electric vehicle.Receiving coil 4 is mounted on electric vehicle and is moved to and sends out with vehicle
Coil in alignment is penetrated, the defeated efficiency of energy is passed to reach maximum.Charging station 2 is direct-connected to be connected to civilian AC power 7.
Wireless charging system operation principle is illustrated in more detail in Fig. 2.Charging station 2 is connected to AC power 7, i.e., it is electric
Net, voltage are alternating current 220V 50Hz or 240V 60Hz.The function of charging station 2 is that input AC electricity is converted into changeable frequency
The adjustable voltage source of voltage magnitude, the voltage source are powered to transmitting coil 3, and 3 surrounding of transmitting coil generates magnetic field.According to electromagnetism sense
Principle is answered, the alternating current magnetic field signal that transmitting coil 3 generates is coupled to receiving coil 4, which feels on vehicle-mounted receiving coil 4
An electric current should be gone out, induced electricity flows through output voltage after electrical equipment 8 is handled, which connects Vehicular charger 9, and then
To charging batteries of electric automobile.
What Fig. 3 illustrated is the scheme of the symmetrical structure of transmitting coil 3 and receiving coil 4.Two loop constructions and performance parameter
It is identical, it can be used interchangeably completely in installing and using, so as to simplify production and reduce system cost.
In the present embodiment, the detailed component of transmitting coil 3 is as shown in figure 4, including fixed poly- magnet-wire disk successively
7th, coil 10, magnetics substrate 11, aluminium barricade 12.The poly- magnet-wire disk 7 includes insulated substrate 21, thin plate ferrite 22.Absolutely
Edge substrate 21 is equipped with around line groove, and coil winding is in line groove.In the present embodiment, it is described around line groove be " returning "
Character form structure, rectangular cross-section, as shown in Fig. 5 a, Fig. 5 b.Poly- magnet-wire disk sets coiling groove structure, can facilitate coil around
Manufacturing demand reduces coil manufacture difficulty, while can ensure the uniformity of coil production parameter.And rectangular shaped structures
Groove can facilitate machining and mould molding demand.Separation guide, multi-disc thin plate ferrite 22 are additionally provided on insulated substrate 21
In embedded separation guide.
Fig. 5 b show poly- 7 sectional view of magnet-wire disk, and 21 material of insulated substrate is high strength plastic part, and forming method can be with
Using injection molding process or process for machining.Thin plate ferrite 22 is embedded in the separation guide of insulated substrate again.Coiling is recessed
Slot and separation guide are arranged at intervals so that coil both sides are equipped with thin plate ferrite 22, and thin plate ferrite 22 can guide coil
Magnetic field flowed along thin plate ferrite, therefore the scattered of magnetic field can be reduced, and then poly- magnetic function, improve coupling journey
Degree.Fig. 5 c influence magnetic field flow schematic diagram for thin plate ferrite, and the magnetic field that coil generates preferentially passes through the ferritic direction of thin plate.
The generation of leakage field is so reduced, and increases the inductance of coil, further improves the efficiency of the electric energy transmission of wireless charging system.This
Outside, the thin plate ferrite in poly- magnet-wire disk is embedded in as strip, while the separation guide in poly- magnet-wire disk is also rectangle, this knot
Configuration shape can easily more be realized compared with annular shape, so as to reduce the complexity for making processing.
Due to working in high frequency electric, the conductor of coil uses Wireless charging coil in order to reduce the influence of kelvin effect
Litz wire is winding wire.In the making of Wireless charging coil, groove spiral shell that the litz wire of coil 10 is opened along poly- magnet-wire disk
The system of curling up, litz wire has kindred effect around being made as being closely packed together when coil before makes.In the present embodiment
In, it is as shown in Figure 10 that certain spacing distance is equipped between litz wire, it is possible to reduce kindred effect is for transmitting coil 3 and receives
The loss of coil 4 influences, while can improve the pressure voltage of coil, further increase mutual inductance between Wireless charging coil away from
From, while this production method can simplify production technology, improve productivity.
Litz wire is to turn to rectangular section using multiply filament and increase the quality factor of litz wire in itself with silk-covered wire.
Technology originally is with general round litz wire line coiling, and there is rectangle litz wire high filling to be compared with circular litz wire
Number, low-impedance feature, it is possible to reduce the loss that litz wire generates heat in itself further improves the transmission of wireless charging system electric energy
Efficiency.Rectangle Ritz cable architecture can bear higher mechanical stretching in the application, it is ensured that the one of coil-winding process
The coiling of cause and wiring performance, have longer flex life, can be provided in processing and making process optimum stress protection and
Opposing circular litz wire dimensionally stable.
Rectangle litz wire manufacturing process is that the thin copper wire of multiply first is carried out transposition to synthesize one enameled wire, then by multiply
The enameled wire of transposition synthesis twists together, and implements the operation of pressure side, the strand behind pressure side for twisted wire using four sides pinch roller
The insulating materials such as zygonema outer wrapping nylon yarn, Formation cross-section are the litz wire of rectangle.In one embodiment of the utility model, rectangle profit
Hereby multiply fine copper wire is first replaced twisted pressure side as rectangle as shown in fig. 6, this is rectangle litz wire schematic cross-section by line, then by 6
The twisted side of pressure again of stock transposition is rectangular.Rectangle Ritz wire shaped that the utility model uses is dimensioned for coil around line groove,
And respectively enclose conducting wire at grade, coil upper surface would not be higher by the upper surface of poly- magnet-wire plate material.The bottom of magnetics substrate
Plate 23 covers the upper surface of coil and poly- magnet-wire disk 7, plays seal protection.
23 upper surface of bottom plate of magnetics substrate is sequentially placed ferrite-plate 24 and lower face plate 25.In the bottom plate 23 4 of magnetics substrate
Make in week lip structure make its be integrally formed groove for install placement ferrite-plate 24.Bottom plate 23 and lower face plate 25 are insulation
Material.The arrangement of ferrite-plate in magnetics substrate 11 can be diversified, can be rectanglar arrangement, can be with toroidal, also
Can be other shapes, the main generation for reducing leakage field.The ferrite of bulk area can not be produced based on current process technology,
The ferrite of bulk is also unfavorable for the demand of hauling operation simultaneously, and ferrite-plate is by polylith thin plate in the present embodiment as shown in Figure 7
Shape ferrite is spliced to form, and the arrangement of this ferrite-plate ensures that magnetism guiding access is continuous, is further reduced leakage field for wireless
The influence of charging system.
For back leakage field problem, magnetic described in the utility model present in existing electric vehicle wireless charging technology
Shielded layer carries out shielding leakage field using metal material.For the rule of industry of the electric vehicle without charging and related international linked groups
It is set to the working frequency 85KHz of wireless charging, this is high frequency.Being shielded for high frequency magnetic field needs the material for selecting high conductance.Eventually
End subscriber wishes the characteristics of size is small, light-weight and electric energy efficiency of transmission is high, cheap for wireless charging device, with reference to
It is upper to consider that point selects aluminium material to make shielding material.The electrical conductivity of aluminium sheet is relatively high, therefore its magnetic shield performance is preferable.
In the present embodiment, shielded layer has the aluminium sheet 12 of flange for four sidebands, as shown in figure 8, aluminium sheet 12 is by 7 He of magnetic-collecting board
In magnetics substrate 11 is wrapped in.Aluminium sheet is as shielding material, when shielding principle is that high frequency AC magnetic field passes through aluminium sheet, due to inductance
Principle of induction, aluminium sheet induced inside generates electric current, and internal vortex is generated in aluminium sheet, according to Ampere's law, aluminium sheet inside whirlpool
The raw magnetic field opposite with leakage field direction of miscarriage, this partial magnetic field offset part stray field.It is based on aluminium material to select aluminium material
Electrical conductivity is relatively high, and the eddy current magnetism of generation is larger, and the stray field that can so offset is opposite just more, so shielding properties
It is all right.But when wireless charging system charges, aluminium sheet can generate loss and heat in itself, so the thickness of aluminium sheet try one's best it is thick simultaneously
And area will be relatively larger than coil, be conducive to the heat dissipation of system.
Fig. 9 a and Fig. 9 b are shown not use and use the shielding aluminium sheet 12 of four side flange after the energization of coil 10 respectively
Generate the schematic diagram in magnetic field.It substantially can be seen that, shielding 12 structure of aluminium sheet with four side flange can reduce leakage field in Fig. 9 b
It generates, further the magnetic line of force to hub of a spool is collapsed, solves coil side leakage field radiation problem, so as to further improve nothing
Degree of coupling between two coils of micro USB electric system improves the efficiency of electric energy transmission.
High-frequency alternating current is passed through in transmitting coil, magnetic field, the magnetic can be generated around transmitting coil
Guiding magnetic direction is played in the magnetic field that ferrite in substrate and poly- magnet-wire disk is generated for transmitting coil, and magnetic field is avoided to dissipate
Into external environment.
For receiving coil, the ferrite in the magnetics substrate and poly- magnet-wire disk can play magnet short-cut path function, into one
Step improves the coefficient of coup of transmitting coil and receiving coil.
Coil and magnetics substrate are superimposed fixation from the top down, since coil is using rectangle litz wire, the upper surface of coil
For a plane, so ensure that being increased to transmitting coil and receiving coil has there is no big gap situation between coil and magnetics substrate
The mutual inductance distance of effect, so as to solve the problems, such as that electric automobile chassis is excessively high.
The knot for being used for electric vehicle Wireless charging coil structure type and each component of this above-mentioned utility model
Structure has been obtained for explaining in detail, and the above is only the preferred embodiment of the utility model only, not limiting this
Utility model, all any modification, equivalent and improvement made within the spirit and principle of the utility model etc. should all wrap
It is contained within the scope of protection of the utility model.
Claims (8)
1. a kind of Wireless charging coil, which is characterized in that including fixed poly- magnet-wire disk, coil, magnetics substrate and shielded layer successively；
The poly- magnet-wire disk includes insulated substrate and thin plate ferrite；The insulated substrate be equipped with it is spaced around line groove and
Every guide groove, in line groove, the thin plate ferrite is embedded in separation guide the coil winding.
2. a kind of Wireless charging coil according to claim 1, which is characterized in that it is described around line groove be " returning " font knot
Structure, rectangular cross-section, the coil are matched with the coiling groove shapes, size.
3. a kind of Wireless charging coil according to claim 1, which is characterized in that the coil is by rectangle litz wire system
Into.
4. a kind of Wireless charging coil according to claim 1, which is characterized in that the thin plate ferrite is strip,
The separation guide rectangular cross-section.
5. a kind of Wireless charging coil according to claim 1, which is characterized in that the magnetics substrate includes bottom plate, iron oxygen
Body plate and lower face plate, the bottom plate covering coil and poly- magnet-wire disk upper surface, play seal protection；The bottom plate surrounding is done
Into lip structure make its be integrally formed groove for install place the ferrite-plate, the lower face plate covering ferrite
Plate.
6. a kind of Wireless charging coil according to claim 5, which is characterized in that ferrite-plate in the magnetics substrate by
The lamellar ferrite of polylith is spliced to form.
7. a kind of Wireless charging coil according to claim 1, which is characterized in that the shielded layer has flange for four sidebands
Aluminium sheet, in magnetic-collecting board and magnetics substrate are wrapped in by the aluminium sheet.
8. a kind of wireless charging system, including transmitting coil and receiving coil, which is characterized in that the transmitting coil and reception line
Circle is using the wireless charging electric wire coil structures as described in claim 1-7 any one, the transmitting coil and receiving coil structure
And performance parameter is identical, is used interchangeably.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721635869.9U CN207458744U (en) | 2017-11-30 | 2017-11-30 | A kind of Wireless charging coil and wireless charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721635869.9U CN207458744U (en) | 2017-11-30 | 2017-11-30 | A kind of Wireless charging coil and wireless charging system |
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| Publication Number | Publication Date |
|---|---|
| CN207458744U true CN207458744U (en) | 2018-06-05 |
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| CN201721635869.9U Active CN207458744U (en) | 2017-11-30 | 2017-11-30 | A kind of Wireless charging coil and wireless charging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278572A (en) * | 2018-10-15 | 2019-01-29 | 许继电源有限公司 | A kind of wireless charger and wireless charging system |
| CN109494827A (en) * | 2018-10-15 | 2019-03-19 | 许继电源有限公司 | Wireless charger and wireless charging system |
-
2017
- 2017-11-30 CN CN201721635869.9U patent/CN207458744U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109278572A (en) * | 2018-10-15 | 2019-01-29 | 许继电源有限公司 | A kind of wireless charger and wireless charging system |
| CN109494827A (en) * | 2018-10-15 | 2019-03-19 | 许继电源有限公司 | Wireless charger and wireless charging system |
| CN109278572B (en) * | 2018-10-15 | 2021-05-14 | 许继电源有限公司 | Wireless charger and wireless charging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Floor 2, building 1, No. 211, Chuanda Road, Pudong New Area, Shanghai, 201200 Patentee after: Shanghai Wanji Electronic Technology Co.,Ltd. Address before: No. 188, Zhongyang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG WANAN YICHUANG ELECTRONIC TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |