CN112787416A - Coil assembly for wireless power transmission and wireless charging relay device - Google Patents
Coil assembly for wireless power transmission and wireless charging relay device Download PDFInfo
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- CN112787416A CN112787416A CN202110100464.XA CN202110100464A CN112787416A CN 112787416 A CN112787416 A CN 112787416A CN 202110100464 A CN202110100464 A CN 202110100464A CN 112787416 A CN112787416 A CN 112787416A
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- 230000005540 biological transmission Effects 0.000 title abstract description 18
- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 238000007639 printing Methods 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 8
- 239000002390 adhesive tape Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02J50/05—Circuit arrangements or systems for wireless supply or distribution of electric power using capacitive 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
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a coil assembly and a wireless charging relay device for wireless power transmission. The coil component used for wireless power transmission comprises at least one coil layer forming an inductor, a flat capacitor and an insulating layer adhered on the coil layer and the flat capacitor for insulation; the wireless charging relay device comprises at least one coil layer forming an inductor, a flat capacitor, an insulating layer adhered to the coil layer and the flat capacitor and playing an insulating role, and a first magnetic-isolating sheet layer and a second magnetic-isolating sheet layer adhered to the outer sides of the outermost insulating layer respectively. Compared with the traditional scheme adopting an independent capacitor, the capacitor needs additional patches, so that the product consistency is not high and potential failure risks exist.
Description
Technical Field
The present invention relates to the field of power electronics, in particular to wireless charging technology, and more particularly, to a coil assembly and a wireless charging relay apparatus for wireless power transmission.
Background
In a wireless power transmission system, the system generally needs to operate near a resonance point for parameters such as system power, efficiency, transmission distance, and the like. The prior art solution is to connect several extra inductors and capacitors in series, parallel or other compound ways in addition to the basic transmitting coil and receiving coil to form resonance. As shown in fig. 1, in the most basic series-series wireless power transmission topology, in addition to a transmitting coil Lp and a receiving coil Ls, a transmitting-end resonant capacitor Cp and a receiving-end resonant capacitor Cs are connected in series for resonance. Primary side resonance frequency
Secondary side resonance frequency
The system operating frequency f is typically chosen to be around two resonant frequencies. In specific implementation, the coil generally has ways of enameled wire winding, litz wire winding, FPC coil, etc., and the capacitor generally adopts separate capacitors such as an additional MLCC (chip multilayer ceramic capacitor), CBB (polypropylene capacitor), etc. The coil produced by the winding process has the defects of low inductance precision, high thickness and the like. The use of discrete capacitors also presents thickness and bulk issues.
Disclosure of Invention
It is an object of the present invention to provide a coil assembly for wireless power transfer.
Another object of the present invention is to provide a wireless charging relay device.
The technical scheme of the invention is as follows:
a coil assembly for wireless power transmission includes at least one coil layer forming an inductor, a plate capacitor, and an insulating layer adhered to the coil layer and the plate capacitor for insulation.
Specifically, the coil comprises at least two coil layers and insulating layers, wherein the at least two coil layers are sequentially stacked, and the insulating layers are adhered between the coil layers and outside the coil layers; the two or more coil layers form an inductor, and a plate capacitor is formed between the two or more coil layers.
The coil comprises at least one coil layer, at least two flat plate layers and insulating layers adhered between the coil layer and the coil layer, between the coil layer and the flat plate layer, between the flat plate layers, outside the coil layer and outside the flat plate layer; the coil layer forms an inductor, and the two or more adjacent plate layers form a plate capacitor.
The coil layer is a spiral coil formed by a copper foil; the insulating layer is made of insulating materials, and materials such as polyimide, polyester or resin can be selected.
The plate layer is formed of a full layer of copper foil to form a plate capacitor.
The wireless charging relay device comprises at least one coil layer forming an inductor, a flat capacitor, an insulating layer adhered to the coil layer and the flat capacitor and playing an insulating role, and a first magnetic-isolating sheet layer and a second magnetic-isolating sheet layer adhered to the outer sides of the outermost insulating layer respectively.
The magnetic shielding coil comprises at least two coil layers, insulating layers adhered between the coil layers and on the outer layers of the coil layers, and a first magnetic shielding sheet layer and a second magnetic shielding sheet layer which are adhered to the outer sides of the outermost insulating layers respectively.
The magnetic shielding device comprises at least two coil layers, at least two flat plate layers, insulating layers, a first magnetic shielding sheet layer and a second magnetic shielding sheet layer, wherein the insulating layers are adhered between the coil layers and the flat plate layers, between the flat plate layers and the outside of the coil layers, and the first magnetic shielding sheet layer and the second magnetic shielding sheet layer are respectively adhered outside the insulating layers on the outermost layers; the coil layer is positioned outside the flat plate layer.
The first magnetic shield layer is an annular magnetic shield layer, the outer diameter of the first magnetic shield layer is slightly larger than that of the adjacent coil layer, and the inner diameter of the first magnetic shield layer is smaller than that of the adjacent coil layer; the second magnetism isolating sheet layer is a circular magnetism isolating sheet layer with the diameter smaller than that of the adjacent coil layer.
Furthermore, the magnetic shielding film further comprises a printing layer adhered to the outer side of the first magnetic shielding sheet layer and a double-sided adhesive tape adhered to the outer side of the second magnetic shielding sheet layer.
The invention has the beneficial effects that:
1. compared with the traditional scheme adopting an independent capacitor, the capacitor needs additional patches, so that the product consistency is not high and potential failure risks exist;
2. the coil component has no additional electronic device, can reduce the thickness and is beneficial to the thin design requirement of electronic products.
Drawings
Fig. 1 is a schematic diagram of a series-series wireless power transmission system in the prior art;
fig. 2 is a structural view of a coil assembly for wireless power transmission according to the present invention;
FIG. 3 is another block diagram of the coil assembly for wireless power transmission according to the present invention;
fig. 4 is a structural diagram of a wireless charging relay device according to the present invention;
fig. 5 is a structural diagram of another embodiment of the wireless charging relay device according to the present invention.
In the figure: 1-coil layer, 2-insulating layer, 3-flat layer, 4-annular magnetic isolation sheet layer, 5-printing layer, 6-circular magnetic isolation sheet layer and 7-double faced adhesive tape.
Detailed Description
For a better understanding of the invention, reference will now be made to the following examples and accompanying drawings.
Example 1
As shown in fig. 2, the coil assembly for wireless power transmission includes an insulation layer 2, a coil layer 1, and an insulation layer 2, which are sequentially adhered together. The two coil layers 1 respectively form an inductor, and meanwhile, the two coil layers 1 can also form a plate capacitor to participate in resonance and are used for wireless power transmission. Further, when the number of the coil layers 1 is larger than two, the coil layers 1 respectively form inductances, and meanwhile, the coil layers 1 can also form a plate capacitor to participate in resonance for wireless power transmission.
Specifically, the coil layer 1 is a spiral coil formed by a copper foil; the insulating layer 2 is made of an insulating material, and polyimide, polyester, resin, or the like can be used.
When designing specificallyThe plate capacitor C can be based on
And (4) calculating. Wherein e is the dielectric of the insulating material between the plates, the unit is F/m, S is the unit of the area of the plate m2And d is the plate spacing in m. In specific implementation, the capacitance can be adjusted by adjusting the material, thickness, plate area, etc. of the insulating material. The inductance L of the coil has more influence factors, is related to the number of turns and the inner and outer diameters of the coil, and can be simulated and calculated by using finite element simulation software.
Example 2
As shown in fig. 3, the coil assembly for wireless power transmission includes an insulation layer 2, a coil layer 1, an insulation layer 2, a plate layer 3, and an insulation layer 2, which are sequentially adhered together. The coil layer 1 is used for forming an inductor, and the overlapped part of the two flat plate layers 3 forms a flat plate capacitor for wireless power transmission. Further, when the number of the flat plate layers 3 is larger than two, the coil layer 1 forms an inductor; the overlapping portions of the plurality of plate layers 3 form plate capacitors for wireless power transmission.
Specifically, the coil layer 1 is a spiral coil formed by a copper foil; the insulating layer 2 is made of an insulating material, and polyimide, polyester, resin, or the like can be used.
When the design is specific, the plate capacitor c can be designed according to
And (4) calculating. Wherein e is the dielectric of the insulating material between the plates, the unit is F/m, S is the unit of the area of the plate m2And d is the plate spacing in m. In specific implementation, the capacitance can be adjusted by adjusting the material, thickness, plate area, etc. of the insulating material. The inductance L of the coil has more influence factors, is related to the number of turns and the inner and outer diameters of the coil, and can be simulated and calculated by using finite element simulation software.
Example 3
As shown in fig. 4, the wireless charging relay device includes a ring-shaped magnetic shield layer 4, an insulating layer 2, a coil layer 1, an insulating layer 2 and a circular magnetic shield layer 6 which are sequentially adhered together; preferably, the two coil layers 2 are identical; the outer diameter of the annular magnet-isolating sheet layer 4 is slightly larger than the inner diameter of the coil and is smaller than the coil layer 1; the diameter of the circular magnet-isolating sheet layer 6 is smaller than that of the coil layer 1.
Furthermore, the magnetic shielding layer further comprises a printing layer 5 adhered to the outer side of the annular magnetic shielding layer 4, and the printing layer 5 is used for printing patterns.
Further, the wireless charging relay device further comprises a double-sided adhesive tape 7 adhered to the outer side of the circular magnetism isolating sheet layer 6, and the double-sided adhesive tape 7 can be used for fixing the wireless charging relay device on a desktop or a wall.
Example 4
As shown in fig. 5, the wireless charging relay device includes a ring-shaped magnetic separator layer 4, an insulating layer 2, a coil layer 1, an insulating layer 2, a flat plate layer 3, an insulating layer 2, a coil layer 1, an insulating layer 2, and a circular magnetic separator layer 6 which are sequentially adhered together; preferably, the outer diameter of the annular magnet-isolating sheet layer 4 is slightly larger than that of the coil layer, and the inner diameter of the annular magnet-isolating sheet layer is smaller than that of the coil layer 1; the diameter of the circular magnet-isolating sheet layer 6 is smaller than that of the coil layer 1. Furthermore, when the number of the flat plate layers 3 can be larger than two and the number of the coil layers 1 can be larger than two, the requirement that only the insulating layer 2 is adhered between the annular magnet-isolating plate layer 4 and the coil layer 1 and only the insulating layer 2 is adhered between the circular magnet-isolating plate layer 6 and the coil layer is met; and can also be used as a wireless charging relay device.
Furthermore, the magnetic shielding layer further comprises a printing layer 5 adhered to the outer side of the annular magnetic shielding layer 4, and the printing layer 5 is used for printing patterns.
Further, the wireless charging relay device further comprises a double-sided adhesive tape 7 adhered to the outer side of the circular magnetism isolating sheet layer 6, and the double-sided adhesive tape 7 can be used for fixing the wireless charging relay device on a desktop or a wall.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, so any modifications, equivalents or improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. Coil assembly for wireless power transfer, characterized by: comprises at least one coil layer forming an inductor, a plate capacitor and an insulating layer adhered on the coil layer and the plate capacitor for insulation.
2. The coil assembly for wireless power transfer of claim 1, wherein: comprises at least two coil layers which are sequentially stacked and an insulating layer which is adhered between the coil layers and outside the coil layers; the two or more coil layers form an inductor, and a plate capacitor is formed between the two or more coil layers.
3. The coil assembly for wireless power transfer of claim 1, wherein: comprises at least one coil layer, at least two flat plate layers and insulating layers adhered between the coil layer and the coil layer, between the coil layer and the flat plate layer, between the flat plate layer and the flat plate layer, outside the coil layer and outside the flat plate layer; the coil layer forms an inductor, and the two or more adjacent plate layers form a plate capacitor.
4. A coil assembly for wireless power transfer according to any of claims 1 to 3, wherein: the coil layer is a spiral coil formed by a copper foil; the insulating layer is made of insulating materials, and materials such as polyimide, polyester or resin can be selected.
5. The coil assembly for wireless power transfer of claim 3, wherein: the flat layer is formed by a whole layer of copper foil and is used for forming a flat capacitor.
6. Wireless relay device that charges, its characterized in that: the inductor comprises at least one coil layer forming an inductor, a panel capacitor, an insulating layer adhered to the coil layer and the panel capacitor and playing an insulating role, and a first magnetic isolating sheet layer and a second magnetic isolating sheet layer which are adhered to the outer sides of the outermost insulating layer respectively.
7. The wireless charging relay device according to claim 6, wherein: the magnetic shield comprises at least two coil layers which are sequentially stacked, insulating layers which are adhered between the coil layers and on the outer layers of the coil layers, and a first magnetic shield layer and a second magnetic shield layer which are respectively adhered to the outer surfaces of the outermost insulating layers.
8. The wireless charging relay device according to claim 6, wherein: the magnetic shield comprises at least two coil layers, at least two flat plate layers, insulating layers, a first magnetic shield layer and a second magnetic shield layer, wherein the insulating layers are adhered between the coil layers and the flat plate layers, between the flat plate layers and outside the coil layers; the coil layer is positioned outside the flat plate layer.
9. The wireless charging relay device according to any one of claims 6 to 8, wherein: the first magnetic shield layer is an annular magnetic shield layer, the outer diameter of the first magnetic shield layer is slightly larger than that of the adjacent coil layer, and the inner diameter of the first magnetic shield layer is smaller than that of the adjacent coil layer; the second magnetism isolating sheet layer is a circular magnetism isolating sheet layer with the diameter smaller than that of the adjacent coil layer.
10. The wireless charging relay device according to claim 6, wherein: the magnetic shielding film further comprises a printing layer adhered to the outer side of the first magnetic shielding sheet layer and a double-sided adhesive tape adhered to the outer side of the second magnetic shielding sheet layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110100464.XA CN112787416A (en) | 2021-01-25 | 2021-01-25 | Coil assembly for wireless power transmission and wireless charging relay device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110100464.XA CN112787416A (en) | 2021-01-25 | 2021-01-25 | Coil assembly for wireless power transmission and wireless charging relay device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112787416A true CN112787416A (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110100464.XA Pending CN112787416A (en) | 2021-01-25 | 2021-01-25 | Coil assembly for wireless power transmission and wireless charging relay device |
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| Country | Link |
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| CN (1) | CN112787416A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120098349A1 (en) * | 2010-10-20 | 2012-04-26 | Electronics And Telecommunications Research Institute | Wireless power transfer device |
| CN104682526A (en) * | 2015-01-31 | 2015-06-03 | 深圳市泰金田科技有限公司 | Energy conversion device for wireless charging of electric automobile |
| CN106877525A (en) * | 2016-11-30 | 2017-06-20 | 北京大学 | A kind of wireless charging method and device based on pyroelectric effect |
| CN108511174A (en) * | 2017-12-25 | 2018-09-07 | 宁波微鹅电子科技有限公司 | A kind of coil module, radio energy radiating circuit and receiving circuit |
| JP2019126202A (en) * | 2018-01-17 | 2019-07-25 | Tdk株式会社 | Lc circuit unit, wireless transmission equipment, wireless power reception device, and wireless power transmission system |
| CN112189293A (en) * | 2018-03-22 | 2021-01-05 | Lg电子株式会社 | Wireless charging panel and wireless charging device |
-
2021
- 2021-01-25 CN CN202110100464.XA patent/CN112787416A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120098349A1 (en) * | 2010-10-20 | 2012-04-26 | Electronics And Telecommunications Research Institute | Wireless power transfer device |
| CN104682526A (en) * | 2015-01-31 | 2015-06-03 | 深圳市泰金田科技有限公司 | Energy conversion device for wireless charging of electric automobile |
| CN106877525A (en) * | 2016-11-30 | 2017-06-20 | 北京大学 | A kind of wireless charging method and device based on pyroelectric effect |
| CN108511174A (en) * | 2017-12-25 | 2018-09-07 | 宁波微鹅电子科技有限公司 | A kind of coil module, radio energy radiating circuit and receiving circuit |
| JP2019126202A (en) * | 2018-01-17 | 2019-07-25 | Tdk株式会社 | Lc circuit unit, wireless transmission equipment, wireless power reception device, and wireless power transmission system |
| CN112189293A (en) * | 2018-03-22 | 2021-01-05 | Lg电子株式会社 | Wireless charging panel and wireless charging device |
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