CN214850646U - Wireless charging electromagnetic positioning structure, wireless charging module and wireless charger - Google Patents
Wireless charging electromagnetic positioning structure, wireless charging module and wireless charger Download PDFInfo
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- CN214850646U CN214850646U CN202120136016.0U CN202120136016U CN214850646U CN 214850646 U CN214850646 U CN 214850646U CN 202120136016 U CN202120136016 U CN 202120136016U CN 214850646 U CN214850646 U CN 214850646U
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Abstract
The utility model provides a wireless charging electromagnetic positioning structure, a wireless charging module and a wireless charger, which comprises a first magnet and a second magnet; the first magnet is located outside the wireless charging coil; the second magnet is positioned inside the wireless charging coil; the magnetizing direction of the first magnet is opposite to that of the second magnet; wireless magnetism location structure that charges can make first magnet and second magnet cooperation form magnetic line of force closed circuit, help improving the magnetic attraction of wireless charging coil transmitting terminal and receiving terminal, and realization coupling coil's that can be more accurate position is aimed at to improve charge efficiency.
Description
Technical Field
The utility model relates to a wireless magnetism location technical field that charges especially relates to a wireless magnetism location structure that charges, wireless module and wireless charger that charges.
Background
The wireless charging technology is a non-contact charging technology which transmits energy of a transmitting end to a receiving end through inductive coupling by utilizing a coil coupling technology. Due to the advantages of convenience, intelligence and diversification, the popularization rate of wireless charging products is higher and higher, and the wireless charging products become a part of the life of people more and more.
With the rapid development of consumer electronics, higher requirements are put on wireless charging technology. Including wireless charging efficiency issues. Charging efficiency is one of the important indicators for evaluating the performance of wireless charging products. The higher the charging efficiency, the faster the charging speed, the lower the energy loss, and the better the performance of the charging module. The factors influencing the wireless charging efficiency are many, and the wireless charging coil design, the wireless charging are promoted by the performance of the magnetic isolation sheet material, the overall structure of the module is optimized, and the like. In addition, the key point influencing the wireless charging efficiency is the position alignment of the coil when the transmitting end and the receiving end are coupled for charging.
The magnetic positioning technology is the most convenient and effective positioning technology at present and is gradually applied to the wireless charging technology, but the magnetic positioning technology applied to the wireless charging at present is single in mode, and only the initial matching of the coil position can be realized.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides a wireless electromagnetism location structure, wireless module and wireless charger that charge, can realize the accurate location between the wireless charging coil, improve charge efficiency.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a wireless charging electromagnetic positioning structure comprises a first magnet and a second magnet;
the first magnet is located outside the wireless charging coil;
the second magnet is positioned inside the wireless charging coil;
the magnetizing direction of the first magnet is opposite to that of the second magnet.
Further, the magnetizing directions of the first magnet and the second magnet are perpendicular to the plane of the wireless charging coil.
Further, the magnetizing directions of the first magnet and the second magnet are axial magnetizing.
Further, the first magnet includes two or more third magnets;
the more than two third magnets are arranged around the wireless charging coil.
Further, the magnetizing directions of the third magnets are the same.
Further, the two or more third magnets are spliced into a ring shape.
Further, the adjacent third magnets are tightly attached to each other.
Further, the first magnet is disposed around an outer ring of the wireless charging coil;
the second magnet is located at the center of the inner ring of the wireless charging coil.
Further, the first magnet has a first through hole.
In order to solve the technical problem, the utility model discloses a another technical scheme be:
a wireless module that charges, includes wireless charging coil and the above-mentioned wireless magnetism location structure that charges.
Further, the magnetic shield also comprises a magnetic shield sheet;
the wireless charging coil is attached to one side of the magnetic separation sheet;
the magnetic separation sheet is provided with a second through hole corresponding to the inner ring of the wireless charging wire;
the second magnet is located in the second through hole.
Further, the second magnet and the second through hole have a first gap;
the first magnet and the magnetic separation sheet are provided with a second gap.
In order to solve the technical problem, the utility model discloses a another technical scheme be:
the transmitting end and the receiving end both comprise the wireless charging module;
and the magnetizing direction of the first magnet at the transmitting end is parallel to that of the first magnet at the receiving end.
The beneficial effects of the utility model reside in that: through adopting the magnetism location structure that sets up first magnet and set up the second magnet in wireless charging coil outside, and the opposite direction that magnetizes of first magnet and second magnet, can make first magnet and the cooperation of second magnet form the closed return circuit of magnetic force line, help improving the magnetic attraction of wireless charging coil transmitting terminal and receiving terminal, position alignment between the realization wireless charging coil that can be more accurate to improve charge efficiency.
Drawings
Fig. 1 is a schematic view of a wireless charging electromagnetic positioning structure according to an embodiment of the present invention;
fig. 2 is a schematic view of another wireless charging magnetic positioning structure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first magnet according to an embodiment of the present invention;
fig. 4 is a schematic structural view of another first magnet according to an embodiment of the present invention;
fig. 5 is a schematic structural view of another first magnet according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a wireless charging module according to an embodiment of the present invention;
fig. 7 is a magnetic force line distribution diagram of sample 1 in the embodiment of the present invention;
fig. 8 is a magnetic force line distribution diagram of sample 2 in the embodiment of the present invention;
fig. 9 is a graph comparing the magnetic attraction force of sample 1 and sample 2 in the embodiment of the present invention.
Description of reference numerals:
1. a wireless charging coil; 2. a magnetic shield sheet; 3. a first magnet; 3.1, a third magnet; 4. a first through hole; 5. a second gap; 6. a third gap; 7. a second magnet; 8. a first gap; 9. a second via.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a wireless charging electromagnetic positioning structure includes a first magnet and a second magnet;
the first magnet is located outside the wireless charging coil;
the second magnet is positioned inside the wireless charging coil;
the magnetizing direction of the first magnet is opposite to that of the second magnet.
As can be seen from the above description, the utility model has the advantages that: the utility model provides a pair of wireless electromagnetism location structure that fills adopts and sets up first magnet and be located the inside magnetism location structure that sets up second magnet of wireless charging coil in wireless charging coil outside, and the opposite direction that magnetizes of first magnet and second magnet, can make first magnet and the cooperation of second magnet form the closed return circuit of magnetic line of force, help improving the magnetic attraction of wireless charging coil transmitting terminal and receiving terminal, position alignment between the realization wireless charging coil that can be more accurate, thereby improve charge efficiency.
Further, the magnetizing directions of the first magnet and the second magnet are perpendicular to the plane of the wireless charging coil.
As can be seen from the above description, by setting the magnetizing directions of the first magnet and the second magnet to be perpendicular to the plane of the wireless charging coil, the positioning magnet of the magnetic positioning structure can generate a large magnetic attraction force in the direction perpendicular to the plane of the coupling coil, so that the position alignment of the coupling coil can be more accurately achieved.
Further, the magnetizing directions of the first magnet and the second magnet are axial magnetizing.
It can be known from the above description that, by setting the first magnet and the second magnet to be axially magnetized, and the magnetizing direction of the first magnet is opposite to that of the second magnet, the magnetic attraction of the magnetic positioning structure can be increased.
Further, the first magnet includes two or more third magnets;
the more than two third magnets are arranged around the wireless charging coil.
Known by the above description, include two above third magnets through setting up first magnet, and set up around wireless charging coil, adjustment that first magnet can be convenient is the symmetrical shape around wireless charging coil, the center of first magnet and the central coincidence of wireless charging coil, the position alignment of realization coupling coil that can be more accurate.
Further, the magnetizing directions of the third magnets are the same.
As can be seen from the above description, since the magnetizing direction of the second magnet is only one direction, by setting the magnetizing directions of the third magnets to be the same, more closed magnetic lines in the same direction can be formed in cooperation with the second magnet, and the density of the magnetic lines can be increased.
Further, the two or more third magnets are spliced into a ring shape.
Known by the above-mentioned description, through with more than two third magnet concatenations form the ring, can the adaptability place the position of second magnet annular center, every third magnet keeps unanimous with the distance of second magnet like this, can make the magnetic attraction that the round of magnetism location structure received unanimous to guarantee that the magnetic attraction between transmitting terminal and receiving terminal is even stable, wireless charging module atress is even.
Further, the adjacent third magnets are tightly attached to each other.
It can be known from the above-mentioned description, under the certain circumstances of first magnet volume, in order to guarantee the less thickness of magnetism location structure, therefore cross sectional area is great, and the close laminating between the adjacent third magnet can reduce the radial dimension of first magnet to can reduce the whole volume of wireless module of charging, the magnetic line of force that the close laminating also is favorable to producing between the adjacent third magnet is even simultaneously.
Further, the first magnet is disposed around an outer ring of the wireless charging coil;
the second magnet is located at the center of the inner ring of the wireless charging coil.
Known from the above description, through the first magnet that sets up around the outer loop of wireless charging coil and the second magnet that is located the inner ring center setting of wireless charging coil, first magnet and second magnet can cooperate and form closed magnetic line of force, the magnetic line of force that surrounds around wireless charging coil can make the more stable realization position of wireless charging coil match.
Further, the first magnet has a first through hole.
As can be seen from the above description, the first through hole is formed in the first magnet, so that the coil lead can be led out, and the thickness of the wireless charging module is reduced.
Referring to fig. 6, a wireless charging module includes a wireless charging coil and the wireless charging magnetic positioning structure.
Further, the magnetic shield also comprises a magnetic shield sheet;
the wireless charging coil is attached to one side of the magnetic separation sheet;
the magnetic separation sheet is provided with a second through hole corresponding to the inner ring of the wireless charging wire;
the second magnet is located in the second through hole.
It can be known from the above description that through setting up the magnetic separation piece can gather together the magnetic flux of induction field between the coupling coil to strengthen the magnetic induction intensity of receiving end coil, simultaneously, reduce electromagnetic signal's decay on the one hand, improve the electromagnetic conversion efficiency in the wireless charging, on the other hand, reduce the magnetic line of force to the electromagnetic interference of other metals and components and parts inside transmitting terminal, receiving terminal.
Further, the second magnet and the second through hole have a first gap;
the first magnet and the magnetic separation sheet are provided with a second gap.
As can be seen from the above description, since the first magnet, the second magnet and the magnetism isolating sheet are made of magnetic materials, by providing the second magnet and the second through hole with a gap and providing the first magnet and the magnetism isolating sheet with a gap, the magnetic materials can be prevented from contacting each other, thereby preventing the magnetic force lines from being distributed along the magnetic materials and ensuring that the first magnet and the second magnet can form closed magnetic force lines.
Referring to fig. 7, a wireless charger includes a transmitting end and a receiving end;
the transmitting end and the receiving end both comprise the wireless charging module;
and the magnetizing direction of the first magnet at the transmitting end is parallel to that of the first magnet at the receiving end.
Wireless electromagnetism location structure and the wireless module and the wireless charger of charging are applicable to any application scene that needs wireless charging, for example wearable intelligent terminal wireless such as cell-phone wireless charging, earphone, wrist-watch charges, the wireless scene of charging of intelligent house, electric automobile wireless, explains through specific implementation mode below:
the embodiment of the utility model discloses a do:
as shown in fig. 1, a wireless charging electromagnetic positioning structure comprises a first magnet 3 and a second magnet 7;
the first magnet 3 is positioned outside the wireless charging coil;
the second magnet 7 is positioned inside the wireless charging coil;
wherein the magnetizing direction of the first magnet 3 is opposite to the magnetizing direction of the second magnet 7;
in an optional embodiment, the magnetizing directions of the first magnet and the second magnet are perpendicular to the plane of the wireless charging coil, so that the first magnet and the second magnet can generate a large magnetic attraction force in the direction perpendicular to the coupling coil, and the magnetic force lines formed by the first magnet and the second magnet can be used for improving the position matching degree between the coupling coils to a large extent;
the wireless charging coil is of an annular structure and comprises an inner ring and an outer ring;
the first magnet 3 is arranged around the outer ring of the wireless charging coil;
the second magnet 7 is positioned in the center of the inner ring of the wireless charging coil;
the shape of the first magnet 3 and the second magnet 7 can be set according to actual requirements, for example, the first magnet 3 can be a ring structure, such as a square ring, a rectangular ring, or a circular ring, and the second magnet 7 can be a circle as shown in fig. 1, a square as shown in fig. 2, or the like.
The embodiment of the utility model discloses an embodiment two is:
a wireless charging magnetic positioning structure is different from the first embodiment in that the structure of a first magnet 3 is further defined;
the first magnet 3 comprises more than two third magnets 3.1;
as shown in fig. 3, in an alternative embodiment, the first magnet 3 includes two third magnets 3.1, and a third gap 6 is formed between adjacent third magnets 3.1;
the size of the third gap 6 can be adjusted according to the area of the first magnet 3 and the size of the wireless charging coil;
in another alternative embodiment, adjacent third magnets 3.1 may be in close fitting connection;
the more than two third magnets 3.1 are arranged around the wireless charging coil;
specifically, the more than two third magnets 3.1 can be spliced into different rings, such as a square ring, a rectangular ring, or a circular ring;
in an alternative embodiment, as shown in fig. 4, the two or more third magnets 3.1 may be distributed in a symmetrical configuration around the second magnet 7;
the position of the second magnet 7 can be adjusted to coincide with the center of the wireless charging coil, so that closed magnetic lines formed by the first magnet 3 and the second magnet 7 are uniformly distributed around the wireless charging coil, and the position matching degree of the coupling coil is improved;
in another alternative embodiment, as shown in fig. 5, the two or more third magnets 3.1 may be distributed in an asymmetric configuration around the second magnet 7;
the magnetizing directions of the third magnets 3.1 are the same;
the third magnet 3.1 can adopt magnetic materials with different shapes and sizes as required;
in an alternative embodiment, the first magnet 3 has a first through hole 4, and the first through hole 4 is used for leading out a coil lead, so that the thickness of the wireless charging module is reduced.
The third embodiment of the present invention is:
as shown in fig. 6, a wireless charging module includes the wireless charging electromagnetic positioning structure in the first embodiment or the second embodiment;
the wireless charging coil 1 and the magnetic separation sheet 2 are also included;
the wireless charging coil 1 is attached to one side of the magnetic separation sheet 2;
specifically, the wireless charging coil 1 is a copper coil, and the specification and size are determined by the design requirements of the product;
the magnetic separation sheet 2 is provided with a second through hole 9 corresponding to the inner ring of the wireless charging coil 1;
wherein the size of the inner ring of the wireless charging coil 1 is larger than that of the second through hole 9;
the second magnet 7 is positioned in the second through hole 9;
a first gap 8 is formed between the second magnet 7 and the hole wall of the second through hole 9;
the first magnet 3 and the magnetism isolating sheet 2 have a second gap 5;
the sizes of the first gap 8 and the second gap 5 can be set according to the product design requirement of the wireless charging module.
The embodiment of the utility model provides a fourth is:
a wireless charger comprises a transmitting end and a receiving end;
the transmitting end and the receiving end both comprise the wireless charging module of the third embodiment;
the number of the first magnets 3 including the third magnets 3.1 in the receiving end and the transmitting end can be set according to actual needs;
specifically, in this embodiment, the number of the first magnets 3 in the receiving end and the transmitting end, which include the third magnets 3.1, is equal to 18;
the first magnets 3 of the transmitting end and the receiving end are axially magnetized and have the same magnetizing direction;
the magnetic pole direction of the side of the transmitting end close to the first magnet 3 of the receiving end is opposite;
the first magnets 3 of the transmitting end and the receiving end are arranged in parallel;
the second magnets 7 of the transmitting end and the receiving end are axially magnetized and have the same magnetizing direction;
the magnetic pole direction of the side of the transmitting end close to the second magnet 7 of the receiving end is opposite;
the second magnets 7 of the transmitting end and the receiving end are arranged in parallel;
in the embodiment, the first magnet 3 and the second magnet 7 in the transmitting end and the receiving end are arranged in parallel, so that closed magnetic lines of force formed between the transmitting end and the receiving end can be concentrated in one direction, and the magnetic attraction of the magnetic positioning structure is enhanced;
the material of the magnetism isolating sheet 2 at the transmitting end comprises soft magnetic ferrite, amorphous, nanocrystalline, permalloy or silicon steel soft magnetic material with certain thickness;
the material of the magnetism isolating sheet 2 at the receiving end comprises at least one layer of nanocrystalline strip, amorphous strip, soft magnetic ferrite, permalloy or other metal soft magnetic materials;
the first magnet 3 is made of a neodymium iron boron permanent magnet material;
in another alternative embodiment, the material of the first magnet 3 may be samarium cobalt or permanent magnetic ferrite.
In order to verify the effect of the wireless charging magnetic positioning structure, the magnetic attraction and the charging efficiency of the wireless charger according to the fourth embodiment and the conventional wireless charger are respectively tested and compared;
the conventional wireless charger is different from the wireless charger described in the fourth embodiment in that the second magnet 7 is absent, and other structures are the same;
taking the wireless charger described in example four as sample 1, and a conventional wireless charger as sample 2;
the magnetic field line distribution of sample 1 is shown in fig. 7, and the magnetic field line distribution of sample 2 is shown in fig. 8;
as can be seen from fig. 7 to 8, the magnetic line density of the magnetic positioning structure in the sample 1 is relatively high, and the magnetic line generated by the first magnet 3 and the second magnet 7 form a closed loop, so that the magnetic attraction force of the magnetic positioning structure is increased. While sample 2 did not have such a magnetic line strengthening phenomenon;
adjusting the distance between the transmitting end and the receiving end to be increased from 0.8mm to 2mm, gradually reducing the magnetic attraction of the magnetic positioning structures in the sample 1 and the sample 2, and showing the comparison graph of the magnetic attraction of the sample 1 and the sample 2 in fig. 9;
as can be seen from fig. 9, the magnetic attraction of the sample 1 is always larger than that of the sample 2, which illustrates that the magnetic positioning structure of the present invention can effectively improve the magnetic attraction of the receiving end and the transmitting end, and can more accurately realize the position alignment of the coupling coil of the charging module, thereby improving the charging efficiency and reducing the energy loss;
the charging efficiencies of sample 1 and sample 2 are shown in table 1;
table 1: charging efficiency of sample 1 and sample 2
Can find out by table 1, sample 1's charge efficiency will be higher than sample 2's charge efficiency, and audio-visually explains the magnetic positioning structure can effectively improve the charge efficiency of wireless module that charges, can improve the speed of charging, reduces power loss.
To sum up, the wireless charging electromagnetic positioning structure, the wireless charging module and the wireless charger provided by the utility model can make the first magnet and the second magnet cooperate to form a magnetic line closed loop by adopting the magnetic positioning structure that the first magnet is arranged outside the wireless charging coil and the second magnet is arranged inside the wireless charging coil, and the magnetizing directions of the first magnet and the second magnet are opposite, and the first magnets at the transmitting end and the receiving end are axially magnetized and have the same magnetizing direction, and the second magnets at the transmitting end and the receiving end are axially magnetized and have the same magnetizing direction, which is helpful for improving the magnetic attraction of the transmitting end and the receiving end of the wireless charging coil, and the magnetizing directions of the first magnet and the second magnet are set to be vertical to the plane of the wireless charging coil, so that the magnetic positioning structure of the transmitting end and the receiving end of the wireless charging coil can generate larger magnetic attraction in the direction vertical to the plane of the coupling coil, first magnet can set up with diversified in a flexible way, can be for including a plurality of third magnet that magnetize the direction the same, simultaneously around wireless charging coil annular setting, can strengthen the density of the closed magnetic line of force of equidirectional to closely the laminating is connected between the adjacent third magnet, can make the even atress of wireless module that charges, thereby the realization coupling coil's that can be more accurate position alignment realizes the further improvement to charge efficiency.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (13)
1. A wireless charging electromagnetic positioning structure is characterized by comprising a first magnet and a second magnet;
the first magnet is located outside the wireless charging coil;
the second magnet is positioned inside the wireless charging coil;
the magnetizing direction of the first magnet is opposite to that of the second magnet.
2. The wireless charging electromagnetic positioning structure of claim 1, wherein the charging direction of the first magnet and the second magnet is perpendicular to the plane of the wireless charging coil.
3. The wirelessly charged electromagnetic positioning structure of claim 1, wherein the first magnet and the second magnet are axially charged.
4. The wireless charging electromagnetic positioning structure of claim 1, wherein the first magnet comprises more than two third magnets;
the more than two third magnets are arranged around the wireless charging coil.
5. The wireless charging electromagnetic positioning structure of claim 4, wherein the charging directions of the third magnets are the same.
6. The wireless charging electromagnetic positioning structure of claim 4, wherein the two or more third magnets are spliced into a ring shape.
7. The wireless charging magnetic positioning structure of claim 6, wherein the adjacent third magnets are tightly attached to each other.
8. The wirelessly charged electromagnetic positioning structure according to any one of claims 1 to 7,
the first magnet is arranged around the outer ring of the wireless charging coil;
the second magnet is located at the center of the inner ring of the wireless charging coil.
9. The wirelessly charged magnetic positioning structure of any one of claims 1 to 7, wherein the first magnet has a first through hole.
10. A wireless charging module, comprising a wireless charging coil and the wireless charging electromagnetic positioning structure of any one of claims 1 to 7.
11. The wireless charging module of claim 10, further comprising a magnetic separator;
the wireless charging coil is attached to one side of the magnetic separation sheet;
the magnetic separation sheet is provided with a second through hole corresponding to the inner ring of the wireless charging coil;
the second magnet is located in the second through hole.
12. The wireless charging module of claim 11, wherein the second magnet has a first gap with the second through hole;
the first magnet and the magnetic separation sheet are provided with a second gap.
13. A wireless charger is characterized by comprising a transmitting end and a receiving end;
the transmitting end and the receiving end both comprise the wireless charging module of claim 11 or 12;
and the magnetizing direction of the first magnet at the transmitting end is parallel to that of the first magnet at the receiving end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120136016.0U CN214850646U (en) | 2021-01-18 | 2021-01-18 | Wireless charging electromagnetic positioning structure, wireless charging module and wireless charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120136016.0U CN214850646U (en) | 2021-01-18 | 2021-01-18 | Wireless charging electromagnetic positioning structure, wireless charging module and wireless charger |
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| Publication Number | Publication Date |
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| CN214850646U true CN214850646U (en) | 2021-11-23 |
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| CN202120136016.0U Active CN214850646U (en) | 2021-01-18 | 2021-01-18 | Wireless charging electromagnetic positioning structure, wireless charging module and wireless charger |
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