CN112242749A

CN112242749A - Wireless charging coil and wireless charging electronic equipment

Info

Publication number: CN112242749A
Application number: CN201910655567.5A
Authority: CN
Inventors: 吴鹏飞; 王彦腾
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2021-01-19

Abstract

The utility model discloses a wireless charging coil and wireless electronic equipment that charges belongs to wireless charging technology field. The wireless charging coil includes at least one deck coiling coil, every layer the coiling coil is formed by at least one wire around the central axis spiral coiling, at least one deck the coiling coil is the taper. The wireless charging coil that this disclosed embodiment provided can improve wireless efficiency of charging.

Description

Wireless charging coil and wireless charging electronic equipment

Technical Field

The utility model relates to a wireless charging technology field, in particular to wireless charging coil and wireless charging electronic equipment.

Background

With the development of charging technology, the charging mode of electronic devices is developing towards wireless charging. In small-power electronic devices such as mobile phones, wireless charging generally employs an electromagnetic induction method, in which a wireless charging coil corresponding to a transmitting coil in a wireless charger is provided in a terminal, and power transmission is realized based on electromagnetic induction.

The charging efficiency of wireless charging coils provided in electronic devices such as mobile phones is still further required to be improved.

Disclosure of Invention

The embodiment of the disclosure provides a wireless charging coil and a wireless charging electronic device, which can improve the wireless charging efficiency, and the technical scheme is as follows:

the embodiment of the disclosure provides a wireless charging coil, wireless charging coil includes at least one deck coiling, every layer coiling is formed by at least one wire around the central axis spiral coiling, at least one deck coiling is the taper.

Optionally, the wound coil has a large end and a small end opposite to each other, and the coil radius of the wound coil decreases from the large end to the small end turn by turn.

Optionally, the wireless charging coil includes at least two layers of wound coils, and the wires used by the at least two layers of wound coils are the same.

Optionally, the winding coils in odd layers are wound by at least one wire in a first direction from outside to inside;

the even layers of the wound coils are wound by the at least one conducting wire from inside to outside along the first direction;

wherein the first direction is clockwise or counterclockwise.

Optionally, each layer of the wound coil is formed by winding at least two wires in parallel.

Optionally, every layer the coiling coil adopts the parallel coiling of first wire and second wire to form, first wire with the first end of second wire is located the first layer the coiling coil, first wire with the second end of second wire is located distance in the second direction the one deck that first layer coiling coil is the farthest the coiling coil, the second direction is the direction that the central axis of coiling coil extends, the second end of first wire with the first end of second wire is connected.

Optionally, the outer surface of the outermost wound coil in the at least one layer of wound coil is provided with a nanocrystalline covering layer, and the outer surface is the surface of the wound coil close to the small end.

The embodiment of the present disclosure further provides a wireless charging electronic device, which includes a housing and the aforementioned wireless charging coil, the wireless charging coil is located in the housing.

Optionally, the large end of the wound coil is close to the housing.

Optionally, the wireless charging electronic device further includes a fixing component, the fixing component is fixedly connected to the housing, the fixing component is in a frustum shape, and the wireless charging coil is attached to the fixing component.

In a possible implementation manner, the wireless charging electronic device further includes a battery, and the wireless charging coil is electrically connected to the battery through a conversion circuit.

Optionally, the wireless charging coil is located between the battery and the housing, and a large end of a wound coil in the wireless charging coil is close to the housing.

Optionally, there is a gap between the fixing member and the battery.

In another possible implementation manner, the wireless charging electronic device further includes an output interface, and the output interface is electrically connected to the wireless charging coil through a conversion circuit.

The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:

when the wireless charging coil is opposite to the transmitting coil of the wireless charger, alternating current with certain frequency is transmitted to the transmitting coil, and the wireless charging coil generates alternating current under the action of electromagnetic induction and converts the alternating current into direct current through the conversion circuit to charge the battery. An included angle exists between a magnetic field generated by the transmitting coil and a coil plane of each turn of coil of the wireless charging coil, and the more the included angle is close to 90 degrees, the larger the induced electromotive force generated is, and the efficiency is relatively higher. Because at least one coiling coil is the taper shape, compare with the wireless charging coil of the plane coiling among the correlation technique, can change the coil plane and the contained angle of the magnetic field that passes through, make as much as possible magnetic induction line and coil plane's contained angle be close to 90, and then can increase the effective magnetic flux through wireless charging coil. Therefore, the wireless charging coil provided by the embodiment of the disclosure can generate a larger induced electromotive force in the magnetic field generated by the same transmitting coil, so as to generate a larger induced current and improve the efficiency of wireless charging.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic diagram of wireless charging;

fig. 2 is a schematic structural diagram of a wireless charging coil having a two-layer wound coil according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a wireless charging system provided in an embodiment of the present disclosure;

figure 4 is a cross-sectional schematic view of a two-layer wireless charging coil provided by embodiments of the present disclosure;

fig. 5 is a schematic structural diagram of a three-layer wireless charging coil provided by an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a four-layer wireless charging coil provided by an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a wireless charging electronic device according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a housing and a stationary component provided by an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a wireless charging electronic device according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of wireless charging. As shown in fig. 1, a transmitting coil m and a wireless charging coil (also called receiving coil) n are respectively disposed in a wireless charger and a wireless charging electronic device to be charged, when the wireless charger and the wireless charging electronic device are close to each other, the transmitting coil m of the wireless charger generates a magnetic field (magnetic induction lines are shown by arrows) under the action of an alternating current with a certain frequency, and the wireless charging coil n of the wireless charging electronic device generates a certain current through electromagnetic induction, so that electric energy is transferred from the wireless charger to the wireless charging electronic device, thereby charging the wireless charging electronic device.

Fig. 2 is a schematic structural diagram of a wireless charging coil with two layers of wound coils according to an embodiment of the present disclosure. As shown in fig. 2, the wireless charging coil includes: at least one layer of wound coil 31, each layer of wound coil 31 is formed by spirally winding at least one wire around the central axis. At least one layer of the wound coils 31 is tapered, that is, all the wound coils 31 may be tapered, or part of the wound coils 31 may be tapered.

In the embodiment shown in fig. 2, the wound coil 31 has a conical shape, and the conical wound coil 31 will be described as an example. In other embodiments, the wound coil 31 may also have a pyramid shape, such as a rectangular pyramid.

Illustratively, in one possible embodiment, the wireless charging coil 3 includes two layers of wound coils 31, and each layer of wound coils 31 has a conical shape.

It should be noted that, when the wireless charging coil 3 has one layer of the wound coil 31, the effect of increasing the generated induced current can also be achieved by setting the wound coil 31 to be conical. Compared with the wireless charging coil 3 with two or more layers of wound coils 31, the structure of the wireless charging coil 3 with only one layer of wound coils 31 is simpler, and the charging efficiency is relatively lower.

The wireless charging coil and the transmitting coil of the wireless charger are oppositely arranged, and when alternating current with certain frequency passes through the transmitting coil, the wireless charging coil generates alternating current through electromagnetic induction and converts the alternating current into direct current through the conversion circuit to charge a battery connected with the wireless charging coil.

Fig. 3 is a schematic diagram of a wireless charging system provided in an embodiment of the present disclosure. As shown in fig. 3, the magnetic induction lines in the magnetic field generated by the transmitting coil m (as indicated by the arrows in fig. 3) make an angle θ with the coil plane of the single turn coil of the wireless charging coil 3. The included angle theta satisfies the formula:

in the formula, phi is magnetic flux; Δ φ is the amount of change in magnetic flux; b is the magnetic field intensity; delta B is the magnetic field intensity variation; s represents the area enclosed by the single-turn coil; theta represents the angle formed by the coil plane of the single-turn coil and the magnetic induction line. As can be seen from this equation, the closer θ is to 90 °, the larger the induced electromotive force generated by the same amount of flux change is, and the higher the charging efficiency is relatively. The conical winding coil of the wireless charging coil is arranged, so that the included angle theta between each coil plane and the magnetic induction line passing through can be adjusted, the included angle theta between most of the magnetic induction lines and the coil planes is close to 90 degrees, and the effective magnetic flux passing through the wireless charging coil can be increased. Compared with the wireless charging coil of plane coiling among the correlation technique, the wireless charging coil that this disclosed embodiment provided can produce bigger induced electromotive force in the magnetic field that the same transmitting coil produced to produce bigger induced current, improve the efficiency of wireless charging. And because the winding coil is the taper shape, the coil plane of each circle coil is wound in the central axis direction in a staggered manner, compared with the wireless charging coil wound on the plane in the related art, the winding radius of the coil with the same number of turns is increased, and then the winding area of the coil is increased, so that the magnetic flux is increased, and the wireless charging efficiency is further improved.

Fig. 4 is a schematic cross-sectional view of a two-layer wireless charging coil provided by an embodiment of the present disclosure. Referring to fig. 2 and 4, wound coil 31 has opposite large end 32 and small end 33, and the radius of wound coil 31 decreases from large end 32 to small end 33 of wound coil 31.

Here, since the wound coil 31 has a tapered shape, the large end 32 of the wound coil 31 is an end of the wound coil 31 having a larger coil radius in the central axis direction, and the small end 33 is an end of the wound coil 31 having a smaller coil radius in the central axis direction.

Illustratively, in the wireless charging coil 3 having two layers of wound coils 31, the wire 1a located at the outermost turn of the first layer has a coil radius d1, which is the distance from the center of the wire 1a to the central axis f around which the wound coils 31 are wound. The wire 1b located adjacent to the outermost wire 1a in the first layer has a coil radius d2, d2 < d 1. The wound coil 31 is tapered by winding the plurality of wires on the wound coil 31 in a staggered manner. The wireless charging coil 3 that this disclosed embodiment provided and the contained angle theta of the magnetic field that passes through are more close 90 for wireless charging coil 3's effective coiling area is bigger, produces bigger induced electromotive force, thereby produces bigger induced-current, has further improved the efficiency of wireless charging.

When the charging power of terminal demand is great, through setting up wireless charging coil 3 to the structure of the range upon range of setting of at least two-layer winding coil 31, thereby the number of turns of increasing wireless charging coil through the number of piles that increases wireless charging coil 3's winding coil 31. In the unit area, compare with the wireless charging coil of individual layer, the produced induced electromotive force of wireless charging coil 3 that has at least two-layer coiling 31 is bigger, realizes the increase of induction current in wireless charging coil 3, has improved the charge efficiency at terminal.

Optionally, in conjunction with fig. 2, the wireless charging coil 3 includes at least two layers of wound coils 31, and the at least two layers of wound coils 31 are made of the same wire. That is, a layer of wound coil 31 is obtained by winding a conducting wire, and then the conducting wire is continuously used for winding to obtain the next layer of wound coil 31 until all layers of wound coils 31 are wound.

For example, in other possible implementations, the wireless charging coil 3 may also have three layers of wound coils 31 and four layers of wound coils 31.

Fig. 5 is a schematic structural diagram of a three-layer wireless charging coil provided in an embodiment of the present disclosure, and as shown in fig. 5, the wireless charging coil 3 has a three-layer wound coil 31. In the wireless charging coil with three-layer wound coil 31, from the lower part to the upper part of fig. 5, the wire is firstly wound into a first layer in an outside-in mode along the clockwise direction, then a second layer is wound in an inside-out mode along the clockwise direction, and finally a third layer is wound in an outside-in mode along the clockwise direction.

Fig. 6 is a schematic structural diagram of a four-layer wireless charging coil provided by an embodiment of the present disclosure. As shown in fig. 6, the wireless charging coil 3 has four layers of wound coil 31. In the wireless charging coil with four layers of wound coils 31, from the lower part to the upper part of fig. 6, the wire is wound in a clockwise direction by an outside-in mode, then a clockwise direction wound second layer is wound by an inside-out mode, finally a clockwise winding third layer is wound by an outside-in mode, and then a clockwise winding fourth layer is wound by an inside-out mode.

It should be noted that the wireless charging coil 3 with three layers of wireless charging coils 31 and four layers of wireless charging coils 31 can increase induced electromotive force, so that induced current in the wireless charging coils is increased, and the charging efficiency of the terminal is improved. The number of layers of the winding coil 31 of the wireless charging coil 3 is only an example, and the wireless charging coil 3 may also have five layers of winding coils 31, six layers of winding coils 31, and the like. For wireless charging electronic devices with different charging efficiency requirements, wireless charging coils 3 with different numbers of wound coils 31 can be provided.

Optionally, when the wireless charging coil comprises a plurality of layers of wound coils, the odd layers of wound coils 31 are wound by at least one conducting wire in a first direction from the outside to the inside; the wound coil 31 of even-numbered layers is wound with at least one wire in a first direction from the inside out. Wherein, the first direction is clockwise direction or anticlockwise direction.

Illustratively, as shown in fig. 2, in the first layer of wound coil 31 (i.e., the lower wound coil 31), the wires (e.g., wires a and B) are wound from outside to inside in a clockwise direction, in the second layer of wound coil 31 (i.e., the upper wound coil 31), the wires (e.g., wires a and B) are wound from inside to outside in a clockwise direction, i.e., the wires in the odd layers and the wires in the even layers of the wireless charging coil 3 are wound in the same direction, and the winding manners are opposite to each other, i.e., the wires in the odd layers are wound from outside to inside, and the wires in the even layers are wound from inside to outside, so as to ensure that the current in each layer of wound coil 31 flows in the same direction.

Alternatively, each layer of the wound coil 31 is formed by winding at least two wires in parallel. The parallel winding means that at least two wires are arranged in parallel on a winding plane of the winding coil 31, and the at least two wires arranged in parallel are wound according to the winding direction and the winding method. Under the condition that the total number of turns of each layer of the wound coil 31 is fixed, the winding time can be saved by adopting a method of winding at least two wires in parallel.

Illustratively, as shown in fig. 2, each layer of the wound coil 31 is formed by winding two wires (i.e., a first wire a and a second wire B) in parallel. Compared with a wireless charging coil wound by a single turn in the related art, the wireless charging coil 3 provided by the embodiment of the disclosure adopts double-turn winding, and under the condition that the total turns of each layer of winding coil 31 are certain, half of winding time can be saved by adopting a double-turn winding method, so that the winding speed of the wireless charging coil 3 is increased, and further, the production efficiency is improved.

In the embodiment of the present disclosure, the winding accuracy and the complexity of the winding process are integrated, and two wires are used to wind the wound coil 31. In other possible implementation manners, the at least two wires may also be three wires, four wires, and the like, as long as improvement of the charging efficiency can be achieved, which is not limited by the embodiment of the disclosure.

Optionally, the first end a1 of the first wire a and the first end B1 of the second wire B are located in the first layer of wound coil 31, the second end a2 of the first wire a and the second end B2 of the second wire B are located in the layer of wound coil 31 farthest from the first layer of wound coil 31 in the second direction, the second direction is a direction in which a central axis of the wound coil 31 extends, and the second end a2 of the first wire a is connected to the first end B1 of the second wire B. The second end of the first wire A is connected with the first end of the second wire B, the wireless charging coil can be formed by winding a wire which is connected end to end, the flow direction of induced current in the wireless charging coil 3 is ensured to be the same, the first end A1 of the first wire A and the second end B2 of the second wire B can be used as positive and negative output ports of the wireless charging coil 3 and are connected with a battery through a conversion circuit, and the conversion circuit is used for converting the current output by the output ports into direct current.

In the disclosed embodiment, the second end a2 of the first wire a and the first end B1 of the second wire B may be connected by, for example, welding.

Optionally, an outer surface of an outermost winding coil 31 of the at least one winding coil 31 has a nanocrystalline covering layer, and the outer surface is a surface of the winding coil 31 near the small end 33. When using wireless charging coil to charge, main aspects 32 are located the one side of being close to wireless charger, and tip 33 is located the one side of keeping away from wireless charger, through set up the nanocrystalline overburden on the coiling coil 31 of keeping away from wireless charger, can block the produced magnetic field of transmitting coil by wireless charger, prevents that magnetic field from passing wireless charging coil and producing and reveal.

Illustratively, the material of the wireless charging coil 3 is a metallic material, such as copper. Copper has the advantages of low material cost and high magnetic permeability.

The disclosed embodiment also provides a wireless charging electronic device, which may include a housing and a wireless charging coil as shown in any one of fig. 2 to 6, the wireless charging coil being located inside the housing. The electronic device may be a mobile terminal, such as the embodiments shown in fig. 7-8, or may be a back clip for charging the mobile terminal, such as the embodiment shown in fig. 9. The electronic device may also be other electronic devices that require wireless charging, which is not limited by this disclosure.

Fig. 7 is a schematic structural diagram of a wireless charging electronic device according to an embodiment of the present disclosure. As shown in fig. 7, an embodiment of the present disclosure provides a wireless charging electronic device, including: the wireless charging coil 3 is located in shell 1.

Alternatively, referring to fig. 1, the central axis f of the wound coil 31 is perpendicular to the case 1, and the large end of the wound coil 31 is close to the case 1. When wireless charging electronic equipment charges, place shell 1 on wireless charger, the contained angle theta that magnetic field that transmitting coil m produced in the wireless charger and wireless charging coil 3 were is close 90 for wireless charging electronic equipment has the highest efficiency of charging.

Optionally, in conjunction with fig. 8, the wireless charging electronic device further includes a battery 2, and the wireless charging coil 3 is electrically connected to the battery through a conversion circuit.

In the embodiments of the present disclosure, the wireless charging electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, and the like. The following is an exemplary description of the embodiment of the present invention.

It should be noted that only a part of the housing 1, i.e., a part of the rear case of the cellular phone, is shown in fig. 7 and 8. The handset back shell typically includes a base plate and a bezel, which is omitted from fig. 7 and 8.

Fig. 8 is a schematic structural diagram of a housing and a fixing component according to an embodiment of the disclosure. As shown in fig. 8, the wireless charging electronic device further includes a fixing component 4, the fixing component 4 is fixedly connected to the housing 1, the fixing component 4 is in a frustum shape, and the wireless charging coil 3 is attached to the fixing component 4. Through set up in shell 1 with shell 1 fixed connection's fixed part 4, play the supporting role to the wireless charging coil 3 that is the toper, prevent to warp.

Illustratively, in conjunction with fig. 7, the fixing member may be fixed to the housing 1 by a bolt or the like. The wireless charging coil 3 can be adhered to the fixing part 4 by glue.

Alternatively, as shown in fig. 7, the wireless charging coil 3 is located between the battery 2 and the housing 1, and the large end 32 of the wound coil 31 in the wireless charging coil 3 is close to the housing 1. With wireless charging coil 3 setting carry out range upon range of the arrangement between battery 2 and shell 1, can reduce the whole area of shell 1, save material.

Optionally, there is a gap between the fixing member 4 and the battery 2. When charging the battery 2, the temperature inside the battery 2 rises, so that the volume of the battery 2 expands to a certain extent, and a space can be reserved for the battery 3 with the increased volume due to the expansion by arranging a pore between the fixing part 4 and the battery 2, thereby preventing the battery 3 and the fixing part 4 from extruding each other and damaging the battery 2.

It should be noted that, because wireless charging coil 3 is conical, each turn of wire in wireless charging coil 3 has a certain distance in the extending direction of central axis f, and wireless charging coil 3 can be regarded as a spring structure with a certain stroke in the extending direction of central axis f. If the expanded battery 2 contacts the wireless charging coil 3, the wireless charging coil 3 also contracts correspondingly along with the extrusion of the battery 2 in the extending direction of the central axis f, and the space of the pore space is not occupied.

Fig. 9 is a schematic structural diagram of a wireless charging electronic device according to an embodiment of the present disclosure. As shown in fig. 9, the wireless charging electronic device includes: the wireless charging coil 3 is located in shell 1.

Alternatively, the arrangement of the wireless charging coil in the housing 1 can be referred to the related description of fig. 7-8, and the detailed description is omitted here.

Exemplarily, the wireless charging electronic device further includes an output interface 5, and the output interface is electrically connected to the wireless charging coil 3 through a conversion circuit.

Optionally, the wireless charging electronics may further comprise circuitry, such as rectification, filtering amplification, etc., connected between the output interface 5 and the wireless charging coil 3.

For example, in the embodiment of the present disclosure, the wireless charging electronic device with the output structure may serve as a back clip of a mobile phone, and the back clip of the mobile phone may be wrapped on a mobile phone shell as a mobile phone shell to protect the mobile phone. And through set up wireless charging coil 3's structure in the cell-phone back splint, with the data line interface connection of the output interface on the back splint and cell-phone, place the cell-phone on wireless charger again, wireless charging coil 3 produces the alternating current through electromagnetic induction and converts the direct current into through converting circuit, can realize wirelessly charging the cell-phone that does not set up wireless charging coil 3.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless charging coil, comprising: the winding device comprises at least one layer of winding coil (31), wherein each layer of winding coil (31) is formed by spirally winding at least one wire around a central axis, and at least one layer of winding coil (31) is in a conical shape.

2. The wireless charging coil according to claim 1, characterized in that the wound coil (3) has opposite large (32) and small (33) ends, the coil radius of the wound coil (31) decreasing turn by turn from the large end (32) to the small end (33).

3. The wireless charging coil according to claim 2, characterized in that the wireless charging coil (3) comprises at least two layers of wound coils (31), and the at least two layers of wound coils (31) are made of the same wire.

4. The wireless charging coil according to claim 3, characterized in that an odd number of layers of the wound coil (31) are wound by at least one wire in an outside-in manner along a first direction, and an even number of layers of the wound coil (31) are wound by the at least one wire in an inside-out manner along the first direction; wherein the first direction is clockwise or counterclockwise.

5. The wireless charging coil according to claim 4, characterized in that each layer of the wound coil (31) is formed by winding at least two wires in parallel.

6. The wireless charging coil of claim 5, wherein each layer of the wound coil (31) is formed by winding a first wire (A) and a second wire (B) in parallel, first ends (A1, B1) of the first wire (A) and the second wire (B) are located at the first layer of the wound coil (31), second ends (A2, B2) of the first wire (A) and the second wire (B) are located at the layer of the wound coil (31) farthest from the first layer of the wound coil (31) in a second direction, the second direction is an extending direction of a central axis of the wound coil (31), and the second end (A2) of the first wire (A) is connected with the first end (B1) of the second wire (B).

7. The wireless charging coil according to claim 6, characterized in that the outer surface of the outermost winding coil (31) of the at least one winding coil (31) has a nanocrystalline coating, and the outer surface is the surface of the winding coil (31) near the small end (33).

8. A wireless charging electronic device, comprising: a housing (1) and a wireless charging coil (3) according to any of claims 1 to 7, the wireless charging coil (3) being located inside the housing (1).

9. The wireless charging electronic device according to claim 8, wherein the large end (32) of the wound coil (31) is close to the housing (1).

10. The wireless charging electronic device according to claim 9, further comprising a fixing component (4), wherein the fixing component (4) is fixedly connected with the housing (1), the fixing component (4) is in a frustum shape, and the wireless charging coil (3) is attached to the fixing component (4).

11. The wireless charging electronic device according to claim 10, further comprising a battery (2), wherein the wireless charging coil (3) is electrically connected with the battery through a conversion circuit.

12. The wireless charging electronic device according to claim 11, characterized in that the wireless charging coil (3) is located between the battery (2) and the housing (1).

13. The wireless charging electronic device according to claim 12, wherein there is a gap between the fixing member (4) and the battery (2).

14. The wireless charging electronic device according to claim 10, further comprising an output interface (5) electrically connected to the wireless charging coil (3) through a conversion circuit.