CN111799071B - Coil topological structure and charging equipment - Google Patents
Coil topological structure and charging equipment Download PDFInfo
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- CN111799071B CN111799071B CN202010563832.XA CN202010563832A CN111799071B CN 111799071 B CN111799071 B CN 111799071B CN 202010563832 A CN202010563832 A CN 202010563832A CN 111799071 B CN111799071 B CN 111799071B
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 68
- 230000004907 flux Effects 0.000 claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052802 copper Inorganic materials 0.000 claims abstract description 55
- 239000010949 copper Substances 0.000 claims abstract description 55
- 238000005192 partition Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 239000013256 coordination polymer Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- 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
-
- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a coil topological structure, which comprises a ferrite base layer, a central copper layer and a coil wire; the central copper layer is circumferentially covered on the middle surface of the ferrite base layer; at least part of the coil wires are wound on the surface of the central copper layer to form a solenoid coil, and the solenoid coil and the central copper layer are combined to form a solenoid; a closed contour pilot coil is provided on the remaining surface of the ferrite base layer. The coil topological structure is characterized in that guide coils are respectively arranged above and below ferrite base layers at two ends of the solenoid, the turns ratio of the guide coils is adjusted, the whole magnetic flux of the coil topological structure is bent upwards, so that the coupling coefficient and the field emission level of the solenoid are remarkably improved, on one hand, the height of a large magnetic flux influence area of the coil topological structure can be correspondingly increased, and on the other hand, the magnetic flux intensity of the coil topological structure on the front face can be correspondingly increased.
Description
Technical Field
The invention relates to the field of wireless charging, in particular to a coil topological structure and charging equipment.
Background
In the application of wireless charging of electric vehicles, a strong electromagnetic field (EMF) is generated by a large current through a coil. In the SAE TIR J2954 standard, different power levels (WPT 1:3.3kW, WPT2:7.7kW and WPT3:11 kW) and ground clearance levels (Z1: 100-150mm, Z2:140-210mm and Z3:170-250 mm) are specified, and a reference design for single coil topologies (such as CP and DDP pads) is provided. Although the coupling coefficient of a solenoid is high, it is affected by high stray magnetic fields that can radiate from the pole ends in various directions, resulting in increased flux loss and leakage rates.
To overcome this problem, many have attempted to redesign the solenoid structure, such as by adding pole faces to enhance coupling and attract the field, such as by shielding the coil with aluminum and the back of the ferrite structure, eliminating the flux at the back and ends to reduce the corresponding magnetic field and re-receiving the magnetic field upward, such as by adding ferrite structures around the primary pads, etc.
However, none of these types of approaches directly address the source of the problem, i.e., the primary magnetic flux is naturally forced to flow horizontally from the end of the solenoid, rather than vertically to the secondary magnetic flux (e.g., CP and DDP), which can result in increased leakage from the sides of the vehicle, increasing the likelihood of interaction with foreign objects. On the other hand, the single-sided magnetic field structure of CP and DDP has its main magnetic flux oriented vertically, only one aluminum back plate is needed to limit stray field emission, and no main magnetic field needs to be redirected, so there is little loss of magnetic flux in CP and DDP structures, e.g., the magnetic efficiency of CP and DDP systems can be 98%, while the secondary efficiency of the system involved for solenoid structural improvement is only around 90%.
Thus, to date, solenoid designs have been excluded from those suggested by SAE standards, and few developers have developed solenoid structures.
Disclosure of Invention
The invention provides a coil topological structure and charging equipment, which are used for improving the existing solenoid structure in the aspect of coil structure so as to improve the performance of the solenoid.
Correspondingly, the invention provides a coil topological structure which comprises a ferrite base layer, a central copper layer and a coil wire;
the center copper layer is covered on the surface of the middle part of the ferrite base layer in a surrounding mode, the opening pointing direction of the center copper layer is in a first direction, the front surface of the ferrite base layer, which is positive in the first direction of the center copper layer, is a first front surface, the back surface of the ferrite base layer, which is positive in the first direction of the center copper layer, is a first back surface, the front surface of the ferrite base layer, which is negative in the first direction of the center copper layer, is a second front surface, and the back surface of the ferrite base layer, which is negative in the first direction of the center copper layer, is a second back surface;
at least part of the coil wires are wound on the surface of the central copper layer to form a solenoid coil, and the solenoid coil and the central copper layer are combined to form a solenoid;
at least part of the coil wires are wound around the closed contour on the first front surface to form a first front surface guide coil, and/or at least part of the coil wires are wound around the closed contour on the first back surface to form a first back surface guide coil, and/or at least part of the coil wires are wound around the closed contour on the second front surface to form a second front surface guide coil, and/or at least part of the coil wires are wound around the closed contour on the second back surface to form a second back surface guide coil.
In an alternative embodiment, when the coil wire forms the first front surface guiding coil, a first front surface guiding copper layer is arranged on the first front surface corresponding to the outline of the first front surface guiding coil, and the first front surface guiding coil is arranged on the surface of the first front surface guiding copper layer;
and/or when the coil wire forms the first back surface guide coil, a first back surface guide copper layer is arranged on the first back surface corresponding to the outline of the first back surface guide coil, and the first back surface guide coil is arranged on the surface of the first back surface guide copper layer;
and/or when the coil wire forms the second front guide coil, a second front guide copper layer is arranged on the second front corresponding to the outline of the second front guide coil, and the second front guide coil is arranged on the surface of the second front guide copper layer;
and/or when the coil wire forms the second back surface guide coil, a second front surface guide copper layer is arranged on the second back surface corresponding to the outline of the second back surface guide coil, and the second back surface guide coil is arranged on the surface of the second back surface guide copper layer.
In an alternative embodiment, a direction perpendicular to the first direction and parallel to the ferrite base layer is a second direction, and shielding lead blocks are respectively arranged on the outer sides of two sides of the second direction of the solenoid coil.
In an alternative embodiment, the shielding lead is embedded in the ferrite base layer.
In an optional embodiment, shielding lead strips arranged along the first direction are embedded and arranged in the ferrite base layer;
the number of the shielding lead strips is two, and the two shielding lead strips are symmetrically arranged on the ferrite base layer and partition the ferrite base layer.
In an alternative embodiment, the coil topology further comprises a shielding lead plate disposed on a back side of the coil topology.
In an alternative embodiment, the magnetic flux direction of the solenoid is forward to the first direction, and when the first front guide coil is provided, the magnetic flux direction of the first front guide coil is upward to the front surface of the ferrite base layer, and when the first back guide coil is provided, the magnetic flux direction of the first back guide coil is upward to the front surface of the ferrite base layer, and when the second front guide coil is provided, the magnetic flux direction of the second front guide coil is downward to the back surface of the ferrite base layer, and when the second back guide coil is provided, the magnetic flux direction of the second back guide coil is downward to the back surface of the ferrite base layer;
or the magnetic flux direction of the solenoid is directed to the first direction negatively, when the first front guide coil is arranged, the magnetic flux direction of the first front guide coil is directed to the lower side of the back surface of the ferrite base layer, when the first back guide coil is arranged, the magnetic flux direction of the first back guide coil is directed to the lower side of the back surface of the ferrite base layer, when the second front guide coil is arranged, the magnetic flux direction of the second front guide coil is directed to the upper side of the front surface of the ferrite base layer, and when the second back guide coil is arranged, the magnetic flux direction of the second back guide coil is directed to the upper side of the front surface of the ferrite base layer.
In an alternative embodiment, the surface of the ferrite base layer is provided with a protective film.
Correspondingly, the invention also provides wireless charging equipment, which comprises a transmitting coil, wherein the transmitting coil is of the coil topological structure.
The invention provides a coil topological structure and charging equipment. In a specific operation, the pilot coils are designed to generate single-sided magnetic flux according to the requirements (controlling flux leakage), and by adjusting the turns ratio of these pilot coils, the overall magnetic flux of the coil topology is bent upward to significantly increase the coupling coefficient and field emission level of the solenoid, thereby increasing the magnetic flux intensity in the front direction of the coil topology. On the one hand, the height of the large flux influencing area of the coil topology can be increased accordingly, and on the other hand, the flux strength of the coil topology on the front side can be increased accordingly.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a schematic top view of a coil topology of an embodiment of the present invention;
FIG. 2 illustrates a schematic diagram of a front view of a coil topology according to an embodiment of the present invention;
FIG. 3 illustrates a front cross-sectional view of a coil topology of an embodiment of the invention;
FIG. 4 shows a schematic representation of the magnetic flux density of a solenoid structure of the prior art;
FIG. 5 illustrates a schematic of magnetic flux density of a coil topology according to an embodiment of the invention;
fig. 6 shows a schematic diagram of a charging system according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments may be combined with each other without conflict.
Fig. 1 shows a schematic top view of a coil topology according to an embodiment of the present invention, fig. 2 shows a schematic front view of a coil topology according to an embodiment of the present invention, and fig. 3 shows a schematic front cross-sectional view of a coil topology according to an embodiment of the present invention.
Basically, an embodiment of the present invention provides a coil topology comprising a ferrite base layer 1, a central copper layer 3 and a coil wire 2.
The center copper layer 3 surrounds and covers on the middle part surface of ferrite basic unit 1, the opening direction of center copper layer 3 is first direction, ferrite basic unit 1 is in the positive front of center copper layer 3 first direction is first positive, ferrite basic unit 1 is in the positive back of center copper layer 3 first direction is first back, ferrite basic unit 1 is in the positive front of center copper layer 3 first direction is second positive, ferrite basic unit 1 is in the negative back of center copper layer 3 first direction is the second back.
Basically, at least part of the coil wires 2 is wound around the surface of the central copper layer 3 to form a solenoid coil 4, and the solenoid coil 4 is combined with the central copper layer 3 to form a solenoid.
At least some of the coil wires 2 form a first front guide coil 101 around a closed contour on the first front side, and/or at least some of the coil wires 2 form a first back guide coil 102 around a closed contour on the first back side, and/or at least some of the coil wires 2 form a second front guide coil 201 around a closed contour on the second front side, and/or at least some of the coil wires 2 form a second back guide coil 202 around a closed contour on the second back side. The embodiment of the present invention is described taking the example of simultaneously providing the first front surface guide coil 101, the first back surface guide coil 102, the second front surface guide coil 201, and the second back surface guide coil 202.
In an alternative embodiment, when the coil wire 2 forms the first front surface guiding coil 101, a first front surface guiding copper layer 10 is disposed on the first front surface corresponding to the outline of the first front surface guiding coil 101, and the first front surface guiding coil 101 is disposed on the first front surface guiding copper layer surface 10;
and/or when the coil wire 2 forms the first back surface guide coil 102, a first back surface guide copper layer 13 is provided on the first back surface corresponding to the outline of the first back surface guide coil 102, and the first back surface guide coil 102 is provided on the surface of the first back surface guide copper layer 13;
and/or when the coil wire 2 forms the second front surface guide coil 201, a second front surface guide copper layer 11 is provided on the second front surface corresponding to the outline of the second front surface guide coil 201, and the second front surface guide coil 201 is provided on the surface of the second front surface guide copper layer 11;
and/or when the coil wire 2 forms the second back surface guide coil 202, a second front surface guide copper layer 14 is disposed on the second back surface corresponding to the outline of the second back surface guide coil 202, and the second back surface guide coil 202 is disposed on the surface of the second back surface guide copper layer 14. With this embodiment, guidance
In an alternative embodiment, a direction perpendicular to the first direction and parallel to the ferrite base layer is a second direction, and shielding lead blocks 5 are respectively arranged on the outer sides of the two sides of the second direction of the solenoid coil. The shielding lead 5 can reduce magnetic leakage in the corresponding direction.
In an alternative embodiment, the shielding lead 5 is embedded in the ferrite base layer 1, so that the ferrite base layer 1 and the shielding lead 5 form a complete piece structure, and the arrangement is convenient.
In an alternative embodiment, shielding lead strips 7 arranged along the first direction are embedded and arranged in the ferrite base layer; the number of the shielding lead strips 7 is two, and the two shielding lead strips 7 are symmetrically arranged on the ferrite base layer and partition the ferrite base layer 1. By this arrangement, it is ensured that the magnetic flux inside the solenoid leaks from both sides in the corresponding direction, ensuring that most of the magnetic flux is conducted between the two shielding lead strips 7.
In an alternative embodiment, the coil topology further comprises a shielding lead plate 15, the shielding lead plate 15 being arranged on the back side of the coil topology. Specifically, the front surface of the coil topological structure is a surface for charging, and the back surface is a non-acting surface, so that the shielding lead plate 15 is arranged on the back surface of the coil topological structure, and magnetic leakage on the back surface of the coil topological structure can be reduced.
In an alternative embodiment, the magnetic flux direction of the solenoid is forward to the first direction, when the first front guide coil is provided, the magnetic flux direction of the first front guide coil is upward to the front surface of the ferrite base layer, when the first back guide coil is provided, the magnetic flux direction of the first back guide coil is upward to the front surface of the ferrite base layer, when the second front guide coil is provided, the magnetic flux direction of the second front guide coil is downward to the back surface of the ferrite base layer, and when the second back guide coil is provided, the magnetic flux direction of the second back guide coil is downward to the back surface of the ferrite base layer.
Or (arrows in fig. 2 and 3 of the drawings are labeled in this embodiment) the magnetic flux direction of the solenoid is directed in the negative direction, and when the first front guide coil is provided, the magnetic flux direction of the first front guide coil is directed below the back surface of the ferrite base layer, when the first back guide coil is provided, the magnetic flux direction of the first back guide coil is directed below the back surface of the ferrite base layer, and when the second front guide coil is provided, the magnetic flux direction of the second front guide coil is directed above the front surface of the ferrite base layer, and when the second back guide coil is provided, the magnetic flux direction of the second back guide coil is directed above the front surface of the ferrite base layer.
In an alternative embodiment, the surface of the ferrite base layer is provided with a protective film.
Fig. 4 shows a schematic view of magnetic flux density of a solenoid structure according to the prior art, wherein fig. 4-a is a schematic view of magnetic flux density of a conventional solenoid structure, and fig. 4-b is a schematic view of magnetic flux density corresponding thereto, and the related magnetic flux density is schematically shown in a strong-weak relationship in the figure due to the inability to show colors, and basically, the magnetic flux density gradually decreases from the solenoid to the outside. As can be seen from the schematic diagram, the magnetic flux density distribution of the conventional solenoid structure is spatially uniform and has no special directivity.
Fig. 5 shows a schematic representation of the magnetic flux density of a coil topology according to an embodiment of the invention. Correspondingly, the coil topological structure of the embodiment of the invention is characterized in that the guide coils are respectively arranged above and below the ferrite at the two ends of the solenoid. In a specific operation, the pilot coils are designed to generate single-sided magnetic flux according to the requirements (controlling flux leakage), and by adjusting the turns ratio of these pilot coils, the overall magnetic flux of the coil topology is bent upward to significantly increase the coupling coefficient and field emission level of the solenoid, thereby increasing the magnetic flux intensity in the front direction of the coil topology. On the one hand, the height of the large flux influencing area of the coil topology can be increased accordingly, and on the other hand, the flux strength of the coil topology on the front side can be increased accordingly.
Fig. 6 shows a schematic diagram of a charging system according to an embodiment of the present invention. Correspondingly, the invention also provides wireless charging equipment, which comprises a transmitting coil L I The transmitting coil L I A coil topology as recited in any of the preceding claims. In particular, the charging system may refer to a charging system in a conventional structure, and fig. 6 of the accompanying drawings shows only one of the structures. It should be noted that the number of the substrates,the coil topology structure of the embodiment of the invention is only applicable to charging equipment based on wireless charging through a charging coil.
The foregoing has described in detail a coil topology and charging apparatus provided by embodiments of the present invention, and specific examples have been employed herein to illustrate the principles and implementations of the present invention, the above examples being provided only to assist in understanding the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (7)
1. The coil topological structure is characterized by comprising a ferrite base layer, a central copper layer and a coil wire;
the center copper layer is covered on the surface of the middle part of the ferrite base layer in a surrounding mode, the opening pointing direction of the center copper layer is in a first direction, the front surface of the ferrite base layer, which is positive in the first direction of the center copper layer, is a first front surface, the back surface of the ferrite base layer, which is positive in the first direction of the center copper layer, is a first back surface, the front surface of the ferrite base layer, which is negative in the first direction of the center copper layer, is a second front surface, and the back surface of the ferrite base layer, which is negative in the first direction of the center copper layer, is a second back surface;
at least part of the coil wires are wound on the surface of the central copper layer to form a solenoid coil, and the solenoid coil and the central copper layer are combined to form a solenoid;
at least part of the coil wires form a first front guide coil around the closed contour on the first front surface, and/or at least part of the coil wires form a first back guide coil around the closed contour on the first back surface, and/or at least part of the coil wires form a second front guide coil around the closed contour on the second front surface, and/or at least part of the coil wires form a second back guide coil around the closed contour on the second back surface;
when the coil wire forms the first front guide coil, a first front guide copper layer is arranged on the first front corresponding to the outline of the first front guide coil, and the first front guide coil is arranged on the surface of the first front guide copper layer;
and/or when the coil wire forms the first back surface guide coil, a first back surface guide copper layer is arranged on the first back surface corresponding to the outline of the first back surface guide coil, and the first back surface guide coil is arranged on the surface of the first back surface guide copper layer;
and/or when the coil wire forms the second front guide coil, a second front guide copper layer is arranged on the second front corresponding to the outline of the second front guide coil, and the second front guide coil is arranged on the surface of the second front guide copper layer;
and/or when the coil wire forms the second back surface guide coil, a second front surface guide copper layer is arranged on the second back surface corresponding to the outline of the second back surface guide coil, and the second back surface guide coil is arranged on the surface of the second back surface guide copper layer;
the magnetic flux direction of the solenoid is forward to the first direction, when the first front guide coil is arranged, the magnetic flux direction of the first front guide coil is upward to the front surface of the ferrite base layer, when the first back guide coil is arranged, the magnetic flux direction of the first back guide coil is upward to the front surface of the ferrite base layer, when the second front guide coil is arranged, the magnetic flux direction of the second front guide coil is downward to the back surface of the ferrite base layer, and when the second back guide coil is arranged, the magnetic flux direction of the second back guide coil is downward to the back surface of the ferrite base layer;
or the magnetic flux direction of the solenoid is directed to the first direction negatively, when the first front guide coil is arranged, the magnetic flux direction of the first front guide coil is directed to the lower side of the back surface of the ferrite base layer, when the first back guide coil is arranged, the magnetic flux direction of the first back guide coil is directed to the lower side of the back surface of the ferrite base layer, when the second front guide coil is arranged, the magnetic flux direction of the second front guide coil is directed to the upper side of the front surface of the ferrite base layer, and when the second back guide coil is arranged, the magnetic flux direction of the second back guide coil is directed to the upper side of the front surface of the ferrite base layer.
2. The coil topology of claim 1, wherein a direction perpendicular to said first direction and parallel to said ferrite base layer is a second direction, and shielding lead blocks are disposed on respective outer sides of said second direction of said solenoid coil.
3. The coil topology of claim 2, wherein said shielding lead is embedded in a ferrite base layer.
4. The coil topology of claim 1, wherein said ferrite base layer is embedded with shielding lead strips disposed along said first direction;
the number of the shielding lead strips is two, and the two shielding lead strips are symmetrically arranged on the ferrite base layer and partition the ferrite base layer.
5. The coil topology of claim 1, further comprising a shielding lead plate disposed on a back side of said coil topology.
6. The coil topology of claim 1, wherein said ferrite base layer surface is provided with a protective film.
7. A wireless charging device comprising a transmit coil, the transmit coil being the coil topology of any one of claims 1 to 6.
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