CN214255859U

CN214255859U - Wireless charging device

Info

Publication number: CN214255859U
Application number: CN202120372406.8U
Authority: CN
Inventors: 尉晓东; 赖焜; 张前锋; 刘光荣; 武钧
Original assignee: Emicore Corp
Current assignee: Emicore Corp
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-09-21
Anticipated expiration: 2031-02-08

Abstract

The utility model relates to a wireless charging device, wherein, wireless charging device includes the casing, and the casing has the installation cavity, and coil, heat dissipation part and shielding part are installed in the installation cavity, and shielding part is located between coil and the heat dissipation part, and has first through-hole, and first through-hole is used for forming the passageway of gas circulation. Through the design, the influence of the shielding component on the heat dissipation efficiency of the wireless charging device can be reduced, so that the heat dissipation channel of the wireless charging device is more reasonable, and the heat dissipation efficiency of the wireless charging device is favorably improved.

Description

Wireless charging device

Technical Field

The application relates to the technical field of wireless charging, in particular to a wireless charging device.

Background

With the development of the technology, electronic devices such as mobile phones and tablet computers have a wireless charging function, wireless charging devices are increasingly popularized, and under the common conditions, the existing high-power wireless charging devices are poor in heat dissipation efficiency, prone to generating heat during use and the like, so that charging power is reduced due to the fact that the heat is generated, and charging time is prolonged.

SUMMERY OF THE UTILITY MODEL

The application provides a wireless charging device for promote wireless charging device's radiating efficiency.

The embodiment of the application provides a wireless charging device, wireless charging device includes:

the air-permeable shell comprises a shell body, a first air inlet and a second air inlet, wherein the shell body is provided with an installation cavity and is provided with an air vent;

the coil is mounted in the mounting cavity;

a heat dissipation member attached to the mounting cavity;

the shielding part is located between the heat dissipation part and the coil and is provided with a first through hole, the first through hole can be communicated with the vent hole, the shielding part is used for shielding the magnetic field generated by the coil, and the first through hole is used for forming a channel for gas circulation.

In a possible embodiment, the shielding member includes a plurality of the first through holes;

each of the first through holes extends in a direction away from a central region of the shielding member.

In one possible embodiment, the material of the shielding member is nanocrystalline or ferrite.

In a possible embodiment, the housing includes a first housing, a second housing and a third housing, the first housing and the second housing enclose the installation cavity, and the third housing is located in the installation cavity;

the heat dissipation part and the shielding part are positioned on two opposite sides of the third shell along the thickness direction of the wireless charging device;

the third shell is provided with a second through hole which is communicated with the first through hole.

In a possible embodiment, the cross-sectional area of the second through-hole is greater than or equal to the cross-sectional area of the first through-hole.

In a possible embodiment, the wireless charging device further comprises a magnetic component, at least part of which is arranged along the circumference of the coil.

In one possible embodiment, the magnetic member includes a plurality of first magnetic segments, and the first magnetic segments are arranged at intervals in a circumferential direction of the coil.

In a possible embodiment, the coil is annular, the magnetic component further comprising a second magnetic segment located inside the coil;

and one end of the second magnetic section is abutted with the shielding component and the other end of the second magnetic section is abutted with the shell along the thickness direction of the wireless charging device.

In one possible embodiment, the thickness of the first magnetic segment is less than the thickness of the second magnetic segment.

In one possible embodiment, the housing has a bottom wall and a side wall, and the bottom wall and the side wall are respectively provided with the airing hole.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is an exploded view of a wireless charging device according to an embodiment of the present disclosure;

fig. 2 is a cross-sectional view of a wireless charging device according to an embodiment of the present application.

Reference numerals:

1-a shell;

11-a first housing;

12-a second housing;

121-bottom wall;

122-a side wall;

123-air holes;

124-a mounting cavity;

13-a third housing;

131-a second via;

2-a coil;

3-a heat-dissipating component;

4-a shielding member;

41-a first through hole;

5-a magnetic component;

51-a first magnetic segment;

52-a second magnetic segment;

6-circuit board.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

With the development of the technology, more and more electronic devices such as mobile phones and tablet computers have a wireless charging function, and when the wireless charging device is used, the electronic devices and the wireless charging device are close to each other, so that the electronic devices can be charged.

In view of this, the present application provides a wireless charging device, which is used to improve the heat dissipation efficiency of the wireless charging device and reduce the possibility of heat generation of the wireless charging device during the use process.

As shown in fig. 1, the present embodiment provides a wireless charging device, which may include a housing 1, where the housing 1 has a mounting cavity 124, and components of the wireless charging device may be mounted in the mounting cavity 124. The shell 1 is provided with a vent hole 123, and the vent hole 123 is communicated with the mounting cavity 124 and used for heat dissipation.

The case 1 may include a first case 11 and a second case 12, and the first case 11 and the second case 12 may be configured to enclose a mounting cavity 124, the first case 11 may be an upper case 1 configured to contact an object to be charged, and the second case 12 may be a bottom case configured to enclose the mounting cavity 124, and protect internal components of the wireless charging apparatus.

Both the bottom wall 121 and the side wall 122 of the casing 1 can be provided with the air holes 123, and such a design not only can facilitate the formation of a passage for gas circulation, but also can facilitate the outflow of heat, thereby facilitating the improvement of the heat dissipation efficiency of the wireless charging device.

The mounting cavity 124 may be provided with a coil 2, a heat dissipation member 3, a shielding member 4, a circuit board 6, and the like, and when an alternating current flows through the coil 2, a magnetic field may be generated, and the magnetic field may be coupled with a coil of the electronic device, so that the coil of the electronic device generates a current under the action of the magnetic field, thereby charging a battery of the electronic device. The heat dissipation member 3 may be a fan or the like for accelerating air flow, thereby facilitating dissipation of heat generated by the coil 2 to the outside of the wireless charging device.

The shielding member 4 is located between the heat dissipation member 3 and the coil 2 and is used for shielding the magnetic field generated by the coil 2, specifically, the shielding member 4 may be installed on a side of the coil 2 away from the first housing 11, and when the coil 2 passes through a current and generates the magnetic field, the shielding member 4 may shield and converge the magnetic field toward a direction where the first housing 11 is located, so as to improve the coupling efficiency of the coil 2.

The shielding member 4 may be provided with a first through hole 41, and the first through hole 41 may communicate with the vent hole 123 for forming a passage of the gas fluid, and the air can pass through the first through hole 41 and leave the mounting cavity 124 from the vent hole 123 under the action of the heat radiating member 3, and during the flow, the heat generated from the coil 2 can be taken away from the wireless charging device.

The ventilation holes 123 in the bottom wall 121 may be air inlet holes, and the ventilation holes 123 in the side wall 122 may be air outlet holes, so that under the action of the heat dissipation component 3, air enters from the air inlet holes in the bottom wall 121, moves in the thickness direction H of the wireless charging device, passes through the first through hole 41, absorbs heat generated by the coil 2, and leaves the wireless charging device from the air outlet holes in the side wall 122, thereby dissipating heat.

The design can be favorable for the wireless charging device to form a gas circulation channel, so that the influence of the shielding part 4 on the heat dissipation efficiency of the wireless charging device is reduced, the possibility of the wireless charging device generating heat and the like is reduced, and the practical use requirement is met better.

As shown in fig. 1, in one possible embodiment, the shielding member 4 may be provided with a plurality of first through holes 41, and the first through holes 41 extend along a central region away from the shielding member 4. Specifically, the first through holes 41 may be radially distributed. The actual extending direction of each first through hole 41 may be set according to the actual structure of the coil 2, for example, when the coil 2 has a circular or annular structure, the first through holes 41 may extend in the radial direction of the coil 2; when the coil 2 is polygonal such as a square, a rectangle, etc., the first through hole 41 may extend in a direction perpendicular to the edge of the coil 2.

Through such design can make first through-hole 41's distribution more even to be favorable to promoting gaseous circulation efficiency more, thereby promote wireless charging device's radiating efficiency, accord with actual user demand more.

In one possible embodiment, the material of the shielding member 4 may be ferrite or nanocrystal.

The ferrite material is easy to process and can be conveniently processed into various shapes, and the nanocrystalline material has larger magnetic saturation density which is 3 times to 4 times of the magnetic flux of the ferrite material under the same condition, so that the thickness of the shielding component 4 made of the nanocrystalline material is smaller, and the miniaturization and light-weight design of the wireless charging device is facilitated. Further, when the thickness of the shielding member 4 is reduced, the heat insulating ability of the shielding member 4 is also reduced, so that the heat dissipation efficiency of the wireless charging device can be further improved.

As shown in fig. 1, the wireless charging device further includes a third housing 13, the third housing 13 may be a middle frame, and the heat dissipation member 3, the coil 2, the shielding member 4, the circuit board 6, and other members may be mounted on the third housing 13. The third housing 13 may be provided with a second through hole 131, and the second through hole 131 may be disposed corresponding to the first through hole 41 and communicate with the first through hole 41 to form a passage for gas circulation, so that air can be guided, and the heat dissipation efficiency of the wireless charging device is improved.

In a possible embodiment, the cross-sectional area of the second through hole 131 may be larger than the cross-sectional area of the shielding member 4. Specifically, in the projection in the thickness direction H of the wireless charging device, the projection range of the first through hole 41 may fall within the projection range of the second through hole 131.

Through such a design, it is possible to facilitate the gas to pass through the first through hole 41 to reach the position where the coil 2 is located, thereby absorbing the heat generated by the coil 2 and discharging the heat out of the wireless charging device.

Specifically, the shielding member 4 and the coil 2 may be disposed on the same side of the third housing 13, with the shielding member 4 being located between the third housing 13 and the coil 2, and the circuit board 6 and the heat dissipation member 3 may be located on a side of the third housing 13 away from the coil 2. The design can reduce the influence of the heat generated by the coil 2 on the circuit board 6, and the heat dissipation component 3 is arranged on the side of the third shell 13 far away from the coil 2, so that the possibility of interference of various components of the wireless charging device during installation can be reduced.

The circuit board 6 may be annular and is sleeved outside the heat dissipation member 3. The design can improve the heat dissipation efficiency of the heat dissipation part 3 on the circuit board 6, and the practical use requirement is met better.

As shown in fig. 1, in one possible embodiment, the wireless charging device further comprises a magnetic component 5, at least part of the magnetic component 5 being able to be arranged along the circumferential direction of the coil 2.

Coupling coefficient of the wireless charging device and the electronic equipment can be improved by arranging the magnetic component 5, so that conversion efficiency of the wireless charging device is improved, and heat generated in the using process is reduced. In order to facilitate molding into a complicated shape and provide a stable structure, the magnetic member 5 may preferably be made of a ferrite material.

As shown in fig. 1, in one possible embodiment, the magnetic member 5 may include a plurality of first magnetic segments 51, and each first magnetic segment 51 is disposed at intervals in the circumferential direction of the coil 2.

Compared with the method of sleeving the annular magnetic component 5 on the outer side of the coil 2, the scheme provided by the embodiment of the present application can leave a predetermined space between the first magnetic segments 51, so as to form a guiding channel, so that the air flows out from the air holes 123 of the side wall 122 of the housing 1, thereby improving the heat dissipation efficiency of the wireless charging device.

As shown in fig. 1, in a possible embodiment, the magnetic component 5 further includes a second magnetic section 52, the coil 2 may be annular, and the second magnetic section 52 is located inside the coil 2, that is, the coil 2 may be sleeved outside the second magnetic section 52. Opposite ends of the second magnetic section 52 abut against the shielding member 4 and the housing 1, respectively, in the thickness direction H of the wireless charging device.

Through such design can further promote wireless charging device's coupling coefficient, promote wireless charging device's charging efficiency, moreover, second magnetism section 52 and casing 1 butt can make and form certain clearance between casing 1 and the coil 2, reduce the possibility of coil 2 and the laminating of casing 1, and the clearance of formation can be used for forming the passageway of gas circulation to be favorable to the gas circulation, promote the radiating efficiency.

In one possible embodiment, the first magnetic segment 51 and the thickness are less than the thickness of the second magnetic segment 52. Through such a design, a gap can be formed between the second magnetic section 52 and the housing 1, which is beneficial to air flow, so that the heat dissipation efficiency of the wireless charging device can be improved.

As shown in fig. 2, the direction indicated by the arrow in the figure is a gas flow direction, the heat dissipation component 3 can promote air to enter the wireless charging device from the air inlet hole, and sequentially pass through the second through hole 131 and the first through hole 41 to reach the position of the coil 2, absorb heat generated by the coil 2, flow to the air outlet hole located on the side wall 122 of the housing 1 along the gap between the first magnetic sections 51 and/or the gap between the second magnetic section 52 and the housing 1, and flow out of the wireless charging device along the air outlet hole.

The embodiment of the application provides a wireless charging device, wherein, wireless charging device includes casing 1, and casing 1 has installation cavity 124, and coil 2, heat dissipation part 3 and shielding part 4 are installed in installation cavity 124, and shielding part 4 is located between coil 2 and heat dissipation part 3, and has first through-hole 41, and first through-hole 41 is used for forming the passageway of gas circulation. Through the design, the influence of the shielding component 4 on the heat dissipation efficiency of the wireless charging device can be reduced, so that the heat dissipation channel of the wireless charging device is more reasonable, and the heat dissipation efficiency of the wireless charging device is favorably improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wireless charging apparatus, comprising:

the air-permeable shell comprises a shell body (1), wherein the shell body (1) is provided with an installation cavity (124), and the shell body (1) is provided with an air hole (123);

a coil (2), the coil (2) being mounted to the mounting cavity (124);

a heat dissipation member (3), wherein the heat dissipation member (3) is mounted to the mounting cavity (124);

shielding part (4), shielding part (4) are located heat dissipation part (3) with between coil (2), and be provided with first through-hole (41), first through-hole (41) can with bleeder vent (123) intercommunication, shielding part (4) are used for shielding the produced magnetic field of coil (2), first through-hole (41) are used for forming the passageway of gas circulation.

2. The wireless charging device according to claim 1, wherein the shielding member (4) includes a plurality of the first through holes (41);

the first through holes (41) each extend in a direction away from a central region of the shield member (4).

3. The wireless charging device according to claim 1, wherein the material of the shielding member (4) is nanocrystalline or ferrite.

4. The wireless charging device according to claim 1, wherein the housing (1) comprises a first housing (11), a second housing (12) and a third housing (13), the first housing (11) and the second housing (12) enclose the mounting cavity (124), and the third housing (13) is located in the mounting cavity (124);

the heat dissipation part (3) and the shielding part (4) are positioned on two opposite sides of the third shell (13) along the thickness direction of the wireless charging device;

the third housing (13) is provided with a second through hole (131), and the second through hole (131) communicates with the first through hole (41).

5. The wireless charging device according to claim 4, wherein a cross-sectional area of the second through-hole (131) is greater than or equal to a cross-sectional area of the first through-hole (41).

6. The wireless charging device according to claim 1, further comprising a magnetic member (5), at least a portion of the magnetic member (5) being disposed along a circumferential direction of the coil (2).

7. The wireless charging device according to claim 6, wherein the magnetic member (5) comprises a plurality of first magnetic segments (51), and each of the first magnetic segments (51) is arranged at intervals in a circumferential direction of the coil (2).

8. The wireless charging device according to claim 7, wherein the coil (2) is ring-shaped, the magnetic member (5) further comprising a second magnetic section (52), the second magnetic section (52) being located inside the coil (2);

one end of the second magnetic section (52) abuts against the shielding component (4) and the other end abuts against the shell (1) along the thickness direction of the wireless charging device.

9. The wireless charging device of claim 8, wherein the thickness of the first magnetic segment (51) is less than the thickness of the second magnetic segment (52).

10. The wireless charging device according to any one of claims 1 to 9, wherein the housing (1) has a bottom wall (121) and a side wall (122), the bottom wall (121) and the side wall (122) being provided with the ventilation holes (123), respectively.