CN108879980B - Wireless charging module structure - Google Patents
Wireless charging module structure Download PDFInfo
- Publication number
- CN108879980B CN108879980B CN201810725481.0A CN201810725481A CN108879980B CN 108879980 B CN108879980 B CN 108879980B CN 201810725481 A CN201810725481 A CN 201810725481A CN 108879980 B CN108879980 B CN 108879980B
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- China
- Prior art keywords
- outer ring
- receiving coil
- wireless charging
- charging module
- sheet body
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 25
- 239000006247 magnetic powder Substances 0.000 claims description 12
- 229910000859 α-Fe Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 6
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 239000003292 glue Substances 0.000 description 8
- 239000000696 magnetic material Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 229910002555 FeNi Inorganic materials 0.000 description 2
- 229910005347 FeSi Inorganic materials 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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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
-
- 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
-
- H02J7/025—
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Regulation Of General Use Transformers (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a wireless charging module structure which comprises a receiving coil, a shielding sheet body, an outer ring magnetizer and a through hole, wherein the receiving coil is arranged close to the bottom surface of the shielding sheet body, the outer ring magnetizer is connected with the shielding sheet body, the outer ring magnetizer is provided with the through hole for accommodating the receiving coil, and the peripheral wall of the through hole is arranged close to the outer edge of the receiving coil. The wireless charging module has higher charging efficiency under the condition of not increasing the thickness.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging module structure.
Background
The wireless charging technology is a method for transmitting energy to a wireless charging receiving coil through a magnetic field by a transmitting end by utilizing near-field electromagnetic induction. Compared with electric field coupling, the wireless charging technology based on the magnetic field coupling principle is closer to a conventional resonant switching power supply.
In order to obtain high charging efficiency and reduce the influence of the electromagnetic field on the electronic equipment during charging, a magnetic material is required. The magnetic material has the function of distributing the magnetic field in the magnetic material with high magnetic conductivity, preventing the magnetic field from penetrating through the magnetic material to reach the inside of the electronic equipment, and causing parts such as metal (battery) and the like in the electronic equipment to absorb the magnetic field so as to generate energy loss and electromagnetic interference. Taking a mobile phone as an example, a battery is generally arranged at a position close to a wireless charging coil, when an alternating magnetic field generated by a transmitting coil passes through a charging module and reaches a metal layer on the surface of the battery, induced current is generated, namely 'vortex', and the vortex generates a magnetic field which counteracts the magnetic field change of a transmitting end, so that the induced voltage of a receiving coil is reduced; and the eddy currents will convert the energy of the magnetic field into heat, so that the mobile phone battery becomes very hot. Therefore, in order to achieve wireless charging of the mobile phone, a device for "isolating the magnetic field" must be placed between the receiving coil and the battery of the mobile phone to avoid the magnetic field affecting the battery.
The conventional device for "isolating magnetic field" is generally a shielding sheet, and as shown in fig. 1, the receiving coil 1 and the shielding sheet body 2 together form a wireless charging module. The magnetic force lines on the periphery of the receiving coil 1 are almost perpendicular to the shielding sheet body 2, so that the shielding effect of the shielding sheet body area corresponding to the periphery of the receiving coil is not very good under the condition that the thickness of the wireless charging module is limited, and the magnetic flux leakage phenomenon can occur, so that the charging efficiency of the wireless charging module is influenced.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the wireless charging module is higher in charging efficiency under the condition of the same thickness.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a wireless module structure that charges, includes receiving coil and shielding piece body, receiving coil is close to the bottom surface setting of shielding piece body, still include with the outer lane magnetizer that the shielding piece body links to each other, be equipped with on the outer lane magnetizer and hold receiving coil's through-hole, the perisporium of through-hole is close to receiving coil's outer fringe sets up.
The invention has the beneficial effects that: the addition of the outer ring magnetizer is equivalent to the increase of the thickness of the shielding sheet body area corresponding to the periphery of the receiving coil, which is beneficial to improving the whole shielding performance of the wireless charging module, thereby improving the charging efficiency of the wireless charging module.
Drawings
FIG. 1 is a cross-sectional view of a prior art wireless charging module;
fig. 2 is a cross-sectional view of a wireless charging module according to a first embodiment of the invention;
fig. 3 is a cross-sectional view of a wireless charging module according to a second embodiment of the invention.
Description of the reference numerals:
1. a receiving coil;
2. a shielding sheet body;
3. an outer ring magnetizer;
31. a through hole;
4. and (5) a glue layer.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
The most critical concept of the invention is as follows: the addition of the outer ring magnetizer is equivalent to the increase of the thickness of the shielding sheet body area corresponding to the periphery of the receiving coil.
Referring to fig. 2 and 3, a wireless charging module structure includes a receiving coil 1 and a shielding sheet body 2, wherein the receiving coil 1 is close to the bottom surface of the shielding sheet body 2, and further includes an outer ring magnetizer 3 connected with the shielding sheet body 2, a through hole 31 for accommodating the receiving coil 1 is provided on the outer ring magnetizer 3, and the peripheral wall of the through hole 31 is close to the outer edge of the receiving coil 1.
From the above description, the beneficial effects of the invention are as follows: the addition of the outer ring magnetizer is equivalent to the increase of the thickness of the shielding sheet body area corresponding to the periphery of the receiving coil, which is beneficial to improving the whole shielding performance of the wireless charging module, thereby improving the charging efficiency of the wireless charging module.
Further, the peripheral wall of the through hole 31 is closely attached to the outer edge of the receiving coil 1.
Further, the shielding plate body 2 is disposed in the through hole 31, and an outer edge of the shielding plate body 2 abuts against a peripheral wall of the through hole 31.
Further, the top surface of the shielding plate body 2 is coplanar with the top surface of the outer ring magnetizer 3.
Further, the top surface of the shielding sheet body 2 is connected with the top surface of the outer ring magnetizer 3 through an adhesive layer 4.
Further, the thickness of the outer ring magnetizer 3 is greater than the thickness of the shielding sheet body 2 and less than or equal to the sum of the thickness of the receiving coil 1 and the thickness of the shielding sheet body 2.
Further, the top surface of the outer ring magnetizer 3 is attached to the bottom surface of the shielding sheet body 2, and the thickness of the outer ring magnetizer 3 is smaller than or equal to the thickness of the receiving coil 1.
As can be seen from the above description, the thickness of the wireless charging module of the present invention is not changed from the conventional wireless charging module, i.e. the thickness of the wireless charging module of the present invention is not increased.
Further, the outer ring magnetizer 3 is a soft magnetic ferrite, or the outer ring magnetizer 3 is a hollow column body formed by laminating a plurality of magnetic powder core films.
Further, the outer ring magnetizer 3 includes at least one magnetically conductive layer, and the magnetically conductive layer is a nanocrystalline strip, an amorphous strip or a metal soft magnetic strip.
Further, the magnetic conductive layer is fragmented.
Example 1
Referring to fig. 2, a first embodiment of the invention is as follows: the utility model provides a wireless module structure that charges, includes receiving coil 1 and shielding piece body 2, receiving coil 1 is close to the bottom surface setting of shielding piece body 2, still include with outer lane magnetizer 3 that shielding piece body 2 links to each other, be equipped with on the outer lane magnetizer 3 and hold receiving coil 1's through-hole 31, the perisporium of through-hole 31 is close to receiving coil 1's outer fringe sets up.
Preferably, the peripheral wall of the through hole 31 is closely attached to the outer edge of the receiving coil 1, that is, the outer edge of the receiving coil 1 abuts against the outer ring magnetizer 3, so that no gap exists between the receiving coil 1 and the peripheral wall of the through hole 31.
In this embodiment, the shielding plate body 2 is disposed in the through hole 31, and the outer edge of the shielding plate body 2 abuts against the peripheral wall of the through hole 31.
Preferably, the top surface of the shielding plate body 2 is coplanar with the top surface of the outer ring magnetizer 3. In detail, the top surface of the shielding sheet body 2 is connected with the top surface of the outer ring magnetizer 3 through a glue layer 4, and preferably, the glue layer 4 is a pressure-sensitive acrylic glue layer.
Further, the thickness of the outer ring magnetizer 3 is greater than the thickness of the shielding sheet body 2 and less than or equal to the sum of the thickness of the receiving coil 1 and the thickness of the shielding sheet body 2.
In this embodiment, the outer ring magnetizer 3 is a soft magnetic ferrite, such as mn—zn ferrite, ni—zn ferrite, and a high-insulation magnetic material. In some embodiments, the outer ring magnetizer 3 may also be a hollow column body formed by stacking multiple layers of magnetic powder core films, for example, a column body formed by stacking multiple layers of FeSi magnetic powder cores, fesai magnetic powder cores and FeNi magnetic powder core films, and two adjacent layers of magnetic powder core films may be bonded by insulating glue.
As a further development, in other embodiments, the outer ring magnetizer 3 may be made of other materials, specifically, the outer ring magnetizer 3 includes at least one magnetically conductive layer, and the magnetically conductive layer is a nanocrystalline strip, an amorphous strip, or a metal soft magnetic strip. When the number of the magnetically conductive layers in the outer ring magnetizer 3 is greater than or equal to two, the adjacent two magnetizers are stacked and bonded through the polymer insulating adhesive. In order to avoid overlarge magnetic loss of the outer ring magnetizer 3, the magnetic conductive layer is preferably fragmented, and in detail, the magnetic conductive layer can be fragmented in a pressing roller rolling mode, and can also be fragmented in a die cutting mode by a die cutting machine.
Example two
Referring to fig. 3, a second embodiment of the present invention is as follows: the utility model provides a wireless module structure that charges, includes receiving coil 1 and shielding piece body 2, receiving coil 1 is close to the bottom surface setting of shielding piece body 2, still include with outer lane magnetizer 3 that shielding piece body 2 links to each other, be equipped with on the outer lane magnetizer 3 and hold receiving coil 1's through-hole 31, the perisporium of through-hole 31 is close to receiving coil 1's outer fringe sets up.
Preferably, the peripheral wall of the through hole 31 is closely attached to the outer edge of the receiving coil 1, that is, the outer edge of the receiving coil 1 abuts against the outer ring magnetizer 3, so that no gap exists between the receiving coil 1 and the peripheral wall of the through hole 31.
In this embodiment, the top surface of the outer ring magnetizer 3 is attached to the bottom surface of the shielding plate body 2, and the thickness of the outer ring magnetizer 3 is less than or equal to the thickness of the receiving coil 1. Optionally, the outer ring magnetizer 3 is adhered to the shielding sheet body 2 through polymer insulating glue (such as pressure sensitive acrylic glue).
In this embodiment, the outer ring magnetizer 3 is a soft magnetic ferrite, such as mn—zn ferrite, ni—zn ferrite, and a high-insulation magnetic material. In some embodiments, the outer ring magnetizer 3 may also be a hollow column body formed by stacking multiple layers of magnetic powder core films, for example, a column body formed by stacking multiple layers of FeSi magnetic powder cores, fesai magnetic powder cores and FeNi magnetic powder core films, and two adjacent layers of magnetic powder core films may be bonded by insulating glue.
In addition, in other embodiments, the outer ring magnetizer 3 may be made of other materials, specifically, the outer ring magnetizer 3 includes at least one magnetically conductive layer, where the magnetically conductive layer is a nanocrystalline strip, an amorphous strip, or a metal soft magnetic strip. When the number of the magnetically conductive layers in the outer ring magnetizer 3 is greater than or equal to two, the adjacent two magnetizers are stacked and bonded through the polymer insulating adhesive. In order to avoid overlarge magnetic loss of the outer ring magnetizer 3, the magnetic conductive layer is preferably fragmented, and in detail, the magnetic conductive layer can be fragmented in a pressing roller rolling mode, and can also be fragmented in a die cutting mode by a die cutting machine.
In summary, according to the wireless charging module provided by the invention, the addition of the outer ring magnetizer is equivalent to increasing the thickness of the shielding sheet body area corresponding to the periphery of the receiving coil, so that the overall shielding performance of the wireless charging module is improved, and the charging efficiency of the wireless charging module is improved; in addition, the thickness of the outer ring magnetizer is thinner, and the thickness of the wireless charging module is not increased.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a wireless module structure that charges, includes receiving coil and shielding piece body, receiving coil is close to the bottom surface setting of shielding piece body, its characterized in that: the shielding plate comprises a shielding plate body, and is characterized by further comprising an outer ring magnetizer connected with the shielding plate body, wherein a through hole for accommodating the receiving coil is formed in the outer ring magnetizer, and the peripheral wall of the through hole is arranged close to the outer edge of the receiving coil; the outer ring magnetizer comprises at least one layer of magnetically conductive layer, and the magnetically conductive layer is a nanocrystalline strip, an amorphous strip or a metal soft magnetic strip.
2. The wireless charging module structure of claim 1, wherein: the peripheral wall of the through hole is closely attached to the outer edge of the receiving coil.
3. The wireless charging module structure of claim 1, wherein: the shielding sheet body is arranged in the through hole, and the outer edge of the shielding sheet body is abutted against the peripheral wall of the through hole.
4. A wireless charging module arrangement as claimed in claim 3, wherein: the top surface of the shielding sheet body is coplanar with the top surface of the outer ring magnetizer.
5. The wireless charging module structure of claim 4, wherein: the top surface of the shielding sheet body is connected with the top surface of the outer ring magnetizer through an adhesive layer.
6. The wireless charging module structure of claim 4, wherein: the thickness of the outer ring magnetizer is larger than that of the shielding sheet body and smaller than or equal to the sum of the thickness of the receiving coil and the thickness of the shielding sheet body.
7. The wireless charging module structure of claim 1, wherein: the top surface of the outer ring magnetizer is attached to the bottom surface of the shielding sheet body, and the thickness of the outer ring magnetizer is smaller than or equal to that of the receiving coil.
8. The wireless charging module structure of claim 1, wherein: the outer ring magnetizer is soft magnetic ferrite or is a hollow columnar body formed by laminating a plurality of layers of magnetic powder core films.
9. The wireless charging module structure of claim 1, wherein: and fragmenting the magnetic conductive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810725481.0A CN108879980B (en) | 2018-07-04 | 2018-07-04 | Wireless charging module structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810725481.0A CN108879980B (en) | 2018-07-04 | 2018-07-04 | Wireless charging module structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108879980A CN108879980A (en) | 2018-11-23 |
| CN108879980B true CN108879980B (en) | 2024-04-02 |
Family
ID=64298803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810725481.0A Active CN108879980B (en) | 2018-07-04 | 2018-07-04 | Wireless charging module structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879980B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105981254A (en) * | 2013-12-17 | 2016-09-28 | 高通股份有限公司 | Coil topologies for inductive power transfer |
| CN107947396A (en) * | 2017-12-05 | 2018-04-20 | 宁波微鹅电子科技有限公司 | A kind of electromagnetic screen, wireless charging transmitting terminal, receiving terminal and system |
| JP2018074053A (en) * | 2016-11-01 | 2018-05-10 | トヨタ自動車株式会社 | Coil unit |
| CN108028121A (en) * | 2015-09-17 | 2018-05-11 | 高通股份有限公司 | Wireless power transfer antenna with separation shielding part |
| CN208548759U (en) * | 2018-07-04 | 2019-02-26 | 信维通信（江苏）有限公司 | A kind of wireless charging modular structure |
-
2018
- 2018-07-04 CN CN201810725481.0A patent/CN108879980B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105981254A (en) * | 2013-12-17 | 2016-09-28 | 高通股份有限公司 | Coil topologies for inductive power transfer |
| CN108028121A (en) * | 2015-09-17 | 2018-05-11 | 高通股份有限公司 | Wireless power transfer antenna with separation shielding part |
| JP2018074053A (en) * | 2016-11-01 | 2018-05-10 | トヨタ自動車株式会社 | Coil unit |
| CN107947396A (en) * | 2017-12-05 | 2018-04-20 | 宁波微鹅电子科技有限公司 | A kind of electromagnetic screen, wireless charging transmitting terminal, receiving terminal and system |
| CN208548759U (en) * | 2018-07-04 | 2019-02-26 | 信维通信（江苏）有限公司 | A kind of wireless charging modular structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108879980A (en) | 2018-11-23 |
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