CN112737143B - Wireless charging coil and charging equipment - Google Patents
Wireless charging coil and charging equipment Download PDFInfo
- Publication number
- CN112737143B CN112737143B CN202011573873.3A CN202011573873A CN112737143B CN 112737143 B CN112737143 B CN 112737143B CN 202011573873 A CN202011573873 A CN 202011573873A CN 112737143 B CN112737143 B CN 112737143B
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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
Abstract
The invention provides a wireless charging coil and charging equipment, comprising: the first coil and the second coil that stranded parallel line constitutes, first coil with the second coil all includes long limit and walks line (1) and minor face and walk line (2), wherein, the line strand number of walking of long limit line (1) is different with the line strand number of walking of minor face line (2). The coil structure can meet the requirement of coil routing in a long and narrow space, and enables the receiving coil to be matched with the inner diameter and the outer diameter of the transmitting coil as far as possible, so that the coupling coefficient between the coils is effectively improved, and the wireless charging efficiency is improved.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging coil and charging equipment.
Background
With the development of wireless charging technology, more and more terminal devices start to apply the wireless charging technology. The wireless charging technology is derived from wireless power transmission, can avoid the direct connection of the electric equipment and the charging equipment, has the characteristics of flexibility, safety, reliability and the like, overcomes the problems of instability of electric contact, limitation of movement of the electric equipment and the like, and becomes an important supplement of a wired power supply mode. The wireless charging technology mainly transmits electric energy in a non-contact mode by means of electromagnetic near field induction, magnetic field resonance, microwave energy transmission and the like. Currently, the Qi standard represented by electromagnetic near field induction is the current mainstream wireless charging technology, and power transmission is realized by generating current through mutual induction of coils at a transmitting end and a receiving end.
The space reserved for the wireless charging receiving coil by the small-sized terminal equipment is small, and the small-sized terminal equipment is often distributed in a slender strip shape. However, the transmitting coil of the wireless charging transmitting socket is often a large circular coil, which is not suitable for wiring in a narrow space. If other non-circular coils are adopted, due to the inconsistency of the shapes of the transmitting and receiving coils, especially the inconsistency of the inner diameter and the outer diameter of the transmitting and receiving coils, the coupling coefficient between the coils is reduced, and therefore the efficiency of the wireless charging system is affected.
Disclosure of Invention
In view of the defects in the prior art, the present invention aims to provide a wireless charging coil and a charging device.
In a first aspect, the present invention provides a wireless charging coil comprising: the first coil and the second coil are formed by multiple strands of parallel wires, the first coil and the second coil both comprise long-edge wires and short-edge wires, and the number of the long-edge wires is different from that of the short-edge wires.
Optionally, the first coil comprises: the line is walked to M thigh parallel long limit and N thigh parallel minor face, the second coil includes: m parallel long-side wires and N short-side wires, wherein M and N are natural numbers larger than 1, and M is smaller than N.
Optionally, the first coil and the second coil are connected in series, the first coil is located on a first wiring layer, and the second coil is located on a second wiring layer.
Optionally, the first coil is wound from outside to inside in the routing direction, and the winding end at the innermost layer is electrically connected to the second coil.
Optionally, the second coil is wound from inside to outside in a routing direction.
Optionally, a difference between an outer diameter of a long side of the first coil and an outer diameter of the transmitting coil is within a first preset range, and a difference between an inner diameter of the long side of the first coil and an inner diameter of the transmitting coil is within a second preset range.
Optionally, a difference between an outer diameter of a long side of the second coil and an outer diameter of the transmitting coil is within a first preset range, and a difference between an inner diameter of the long side of the second coil and an inner diameter of the transmitting coil is within a second preset range.
Optionally, a difference between an inner diameter of a short side of the first coil and an inner diameter of the transmitting coil is within a third preset range.
Optionally, a difference between an inner diameter of a short side of the second coil and an inner diameter of the transmitting coil is within a third preset range.
In a second aspect, the present invention provides a charging device, including a wireless charging coil according to any one of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
the wireless charging coil and the charging equipment provided by the invention can meet the coil wiring requirement of a long and narrow space, and the receiving coil is matched with the inner diameter and the outer diameter of the transmitting coil as much as possible, so that the coupling coefficient between the coils is effectively improved, and the wireless charging efficiency is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a first layer wiring structure of a wireless charging coil according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second layer wiring structure of a wireless charging coil according to an embodiment of the present invention;
in the figure:
1-routing long edges;
2-short edge routing.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Fig. 1 is a schematic diagram of a first layer of wiring structure of a wireless charging coil according to an embodiment of the present invention; fig. 2 is a schematic diagram of a second layer wiring structure of a wireless charging coil according to an embodiment of the present invention. Referring to fig. 1 and 2, the wireless charging coil in this embodiment includes: first coil and the second coil that stranded parallel wiring constitutes, first coil and second coil all include long limit and walk line 1 and minor face and walk line 2, and wherein, the line strand number of walking of line 1 is walked with the minor face to the long limit walks the line strand number of walking of 2 and is different.
In this embodiment, a form of multiple parallel wires is adopted, the first coil and the second coil are connected in series, the first coil is located on the first wiring layer, and the second coil is located on the second wiring layer.
Illustratively, the first coil includes: line 1 is walked to the long limit of M thigh parallelism and 2 is walked to the parallel minor face of N thigh, and the second coil includes: m parallel long-side wires 1 and N short-side wires 2, wherein M and N are natural numbers larger than 1, and M is smaller than N.
The number of the wire strands of the first coil and the second coil is not limited in this embodiment, and the flexible arrangement can be performed according to the performance requirement of the electronic device.
In an exemplary embodiment, the first coil is wound from outside to inside, and the innermost winding end is electrically connected to the second coil. Correspondingly, the wiring direction of the second coil is wound from inside to outside.
Illustratively, the difference between the outer diameter of the long side of the first coil and the outer diameter of the transmitting coil is within a first preset range, and the difference between the inner diameter of the long side of the first coil and the inner diameter of the transmitting coil is within a second preset range.
Illustratively, the difference between the outer diameter of the long side of the second coil and the outer diameter of the transmitting coil is within a first preset range, and the difference between the inner diameter of the long side of the second coil and the inner diameter of the transmitting coil is within a second preset range.
Illustratively, the difference between the inner diameter of the short side of the first coil and the inner diameter of the transmitting coil is within a third predetermined range.
Illustratively, the difference between the inner diameter of the short side of the second coil and the inner diameter of the transmitting coil is within a third predetermined range.
In this embodiment, the inner diameter and the outer diameter of the long-side routing are as close as possible to the inner diameter and the outer diameter of the transmitting coil. The inner diameter of the short-side wire is as close as possible to the inner diameter of the transmitting coil, and the outer diameter of the short-side wire is not required. The design mode can meet the requirement of coil wiring in a long and narrow space, and enables the receiving coil to be matched with the inner diameter and the outer diameter of the transmitting coil as far as possible, so that the coupling coefficient between the coils is effectively improved, and the wireless charging efficiency is improved.
Furthermore, the embodiment of the present invention also provides a charging device, which includes the above wireless charging coil.
The charging device in the embodiment has a smaller volume and higher charging efficiency.
The foregoing description has described specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. A wireless charging coil, comprising: the first coil and the second coil are formed by multiple strands of parallel wires, the first coil and the second coil both comprise long-side wires (1) and short-side wires (2), and the number of the long-side wires (1) is different from that of the short-side wires (2); the first coil includes: line (1) is walked to long limit of M thigh parallelism and N thigh parallel minor face is walked (2), the second coil includes: m parallel long-side lines (1) and N short-side lines (2), wherein M and N are natural numbers larger than 1, and M is less than N.
2. The wireless charging coil of claim 1, wherein the first coil and the second coil are connected in series, and wherein the first coil is located in a first wiring level and the second coil is located in a second wiring level.
3. The wireless charging coil of claim 1, wherein the first coil is wound from outside to inside in a winding direction, and an innermost winding end is electrically connected to the second coil.
4. The wireless charging coil of claim 1, wherein the second coil is wound inside out.
5. The wireless charging coil of any of claims 1-4, wherein the difference between the outer diameter of the long side of the first coil and the outer diameter of the transmitting coil is within a first predetermined range, and the difference between the inner diameter of the long side of the first coil and the inner diameter of the transmitting coil is within a second predetermined range.
6. The wireless charging coil of any of claims 1-4, wherein the difference between the outer diameter of the long side of the second coil and the outer diameter of the transmitting coil is within a first predetermined range, and the difference between the inner diameter of the long side of the second coil and the inner diameter of the transmitting coil is within a second predetermined range.
7. The wireless charging coil of any of claims 1-4, wherein the difference between the inner diameter of the short side of the first coil and the inner diameter of the transmitting coil is within a third predetermined range.
8. The wireless charging coil of any of claims 1-4, wherein the difference between the inner diameter of the short side of the second coil and the inner diameter of the transmitting coil is within a third predetermined range.
9. A charging device comprising the wireless charging coil of any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011573873.3A CN112737143B (en) | 2020-12-25 | 2020-12-25 | Wireless charging coil and charging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011573873.3A CN112737143B (en) | 2020-12-25 | 2020-12-25 | Wireless charging coil and charging equipment |
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| Publication Number | Publication Date |
|---|---|
| CN112737143A CN112737143A (en) | 2021-04-30 |
| CN112737143B true CN112737143B (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011573873.3A Active CN112737143B (en) | 2020-12-25 | 2020-12-25 | Wireless charging coil and charging equipment |
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| Country | Link |
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| CN (1) | CN112737143B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878111A (en) * | 2018-06-05 | 2018-11-23 | 上海交通大学 | A kind of eclipsed form Wireless charging coil and electric energy transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3815679B2 (en) * | 2003-05-19 | 2006-08-30 | Ｔｄｋ株式会社 | Multilayer electronic components |
| CN104917302B (en) * | 2015-07-08 | 2017-03-08 | 重庆大学 | Electric automobile wireless power supply system to embedded energy transmitting coil, method for designing and coil system |
| CN106205986A (en) * | 2016-08-15 | 2016-12-07 | 上海交通大学 | Bipolarity Wireless charging coil |
| US10097031B2 (en) * | 2016-09-20 | 2018-10-09 | Hong Kong Applied Science And Technology Research Insittute Company Limited | Charging device having small loop transmission coils for wireless charging a target device |
| US10516297B2 (en) * | 2017-03-07 | 2019-12-24 | Hyundai Motor Company | Wireless power transfer pad and ground assembly having the same |
| CN109177760A (en) * | 2018-09-19 | 2019-01-11 | 北京理工大学 | One kind can switching wireless charging device |
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- 2020-12-25 CN CN202011573873.3A patent/CN112737143B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878111A (en) * | 2018-06-05 | 2018-11-23 | 上海交通大学 | A kind of eclipsed form Wireless charging coil and electric energy transmission system |
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| CN112737143A (en) | 2021-04-30 |
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