Magnetic wireless charging module

Abstract

A magnetic wireless charging module, comprising a housing, supports (40), an annular magnet sheet (50), coils (20) and a PCB assembly (30), wherein the housing is provided with a notch (13), the PCB assembly is provided with solder joints (32), and the solder joints are arranged in the notch; the housing is connected to the supports by means of a detachable structure; a through groove is formed in the middle of the annular magnet sheet, the coils are arranged in the through groove, and an elastic member (51) is arranged below the annular magnet sheet; the PCB assembly, the annular magnet sheet, the coils and the elastic member are respectively arranged in the housing, and the upper end face of the annular magnet sheet abuts against the housing. The housing is not prone to being in contact during wire bonding, short circuit is not likely to occur, and the safety performance is high, different fixing modes can be adopted, the requirements of different users are met, the performance of magnetic strength control of the module can be improved, and the charging efficiency is improved.

Description

A magnetic wireless charging module

[0001] This application is based on the Chinese patent application with application number 202310920659.8 and application date July 25, 2023, and claims its priority. The entire content of the application is hereby introduced as a whole into this application. Technical Field

[0002] The present application relates to the technical field of wireless charging modules, and in particular to a magnetic wireless charging module. Background Art

[0003] As electrical devices continue to demand higher power quality, safety, reliability, convenience, immediacy, and adaptability to specific occasions and geographical environments, contact-based power transmission methods are increasingly unable to meet practical needs. Wireless chargers utilize the principle of electromagnetic induction for charging, similar to a transformer. A coil is placed at both the transmitting and receiving ends. The transmitting coil, under the influence of electricity, emits an electromagnetic signal, which is then received and converted into electrical current by the receiving coil, achieving wireless charging. Wireless charging technology is a unique power supply method that eliminates the need for power cords and relies on electromagnetic wave propagation. The energy of these waves is then converted into electrical energy, ultimately enabling wireless charging.

[0004] The existing QI2.0+MPP magnetic wireless charging module can only weld wires and has a single function. In addition, a groove is set on the outer shell, and the welding board is exposed in the groove. This method is easy to contact the outer shell when welding, causing a short circuit on the circuit board. The safety performance is low, and it can only be fixed by gluing. In addition, the magnetic suction force is difficult to control, resulting in poor charging efficiency.

[0005] Therefore, it is necessary to design a new module that can prevent the wire from contacting the outer shell during welding, prevent short circuits, and have high safety performance. Different fixing methods can be used to meet the needs of different users, improve the module's magnetic attraction force control performance, and improve charging efficiency. Application Contents

[0006] The technical problem to be solved by this application is to provide a magnetic wireless charging module.

[0007] In order to solve the above technical problems, the purpose of this application is achieved through the following technical solutions: providing a magnetic wireless charging module, including: a shell, a bracket, a ring-shaped magnet sheet coil and a PCB assembly, the shell is provided with a notch, the PCB assembly is provided with a solder point, and the solder point is placed in the notch; the shell and the bracket are connected with a detachable structure; a through groove is provided in the middle of the ring-shaped magnet sheet, the coil is placed in the through groove, and an elastic sheet is provided under the ring-shaped magnet sheet, the PCB assembly, the ring-shaped magnet sheet, the coil and the elastic sheet are respectively arranged in the shell, and the upper end surface of the ring-shaped magnet sheet is in contact with the shell.

[0008] A further technical solution is as follows: the shell includes an upper cover and a bottom shell, the lower end surface of the upper cover is provided with an opening, the bottom shell is sealed at the opening, and the bottom shell is provided with the notch.

[0009] A further technical solution is as follows: a cavity is formed between the upper cover and the bottom shell, the PCB assembly, the annular magnet sheet, the coil and the elastic sheet are respectively placed in the cavity, and the notch is connected to the cavity.

[0010] A further technical solution is: it also includes a power strip, the PCB component is provided with a welding wire hole, and the power strip is connected to the welding wire hole.

[0011] A further technical solution is: the welding wire hole is placed at the notch, and the power strip is placed at the notch.

[0012] A further technical solution is as follows: a first positioning hole is provided on the PCB assembly, a second positioning hole is provided on the housing, and the first positioning hole is aligned with the second positioning hole.

[0013] Its further technical solution is: it also includes a ferrite block, a first heat dissipation component and a second heat dissipation component, the ferrite block is placed in the coil, the first heat dissipation component is located below the ferrite block; the PCB component is located above the second heat dissipation component; the first heat dissipation component is located above the PCB component.

[0014] Its further technical solution is: the first heat dissipation component includes shock-proof cotton and a first graphite sheet, the shock-proof cotton is located below the ferrite magnet block, and the first graphite sheet is located below the shock-proof cotton; the first graphite sheet is located above the PCB component.

[0015] A further technical solution is: the coil surrounds the outer periphery of the ferrite block.

[0016] A further technical solution is: the second heat dissipation component includes a heat conductive block and a second graphite sheet, the heat conductive block is located below the PCB component, and the second graphite sheet is located below the heat conductive block.

[0017] The beneficial effects of the present application compared with the prior art are as follows: the present application sets a notch on the shell, and the notch can completely expose the welding point during welding, and sets an elastic sheet so that the annular magnet sheet can fit the shell, and the bracket installation can be selected according to actual conditions, so that it is not easy to contact the shell during welding, it is not easy to short-circuit, and the safety performance is high. Different fixing methods can be used to meet the needs of different users, improve the performance of the module's magnetic attraction force control, and improve the charging efficiency.

[0018] The present application will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] FIG1 is a schematic diagram of the three-dimensional structure of a magnetic wireless charging module provided in Example 1 of the present application;

[0021] FIG2 is a schematic diagram of the exploded structure of a magnetic wireless charging module provided in Example 1 of the present application;

[0022] FIG3 is a schematic cross-sectional view of a magnetic wireless charging module provided in Example 1 of the present application;

[0023] FIG4 is a schematic diagram of the three-dimensional structure of a magnetic wireless charging module provided in Example 2 of the present application;

[0024] FIG5 is a schematic diagram of the three-dimensional structure of the magnetic wireless charging module without the bracket in various installation methods provided by an embodiment of the present invention;

[0025] Description of the symbols in the figure:

[0026] 10. Upper cover; 11. Bottom shell; 12. Second positioning hole; 13. Notch; 20. Coil; 30. PCB assembly; 31. Solder hole; 32. Solder point; 33. First positioning hole; 40. Bracket; 50. Ring magnet; 51. Elastic sheet; 60. Shockproof cotton; 70. Ferrite magnet block; 80. First graphite sheet; 90. Thermal block; 100. Second graphite sheet; 110. Power strip. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0029] It should also be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0031] Please refer to Figure 1, which is a schematic diagram of the three-dimensional structure of a magnetic wireless charging module provided in an embodiment of the present application; it can be used in products that require wireless charging, so that the wires are not easily contacted with the outer casing during welding, short circuit is not easy, and the safety performance is high. Different fixing methods can be adopted to meet the needs of different users, improve the performance of the module's magnetic force control, and improve charging efficiency.

[0032] Please refer to Figure 1. The above-mentioned magnetic wireless charging module includes: a shell, a bracket 40, a ring-shaped magnet sheet 50, a coil 20 and a PCB assembly 30. The shell is provided with a notch 13, and the PCB assembly 30 is provided with a solder joint 32, which is placed in the notch 13; the shell and the bracket 40 are connected with a detachable structure; a through groove is provided in the middle of the ring-shaped magnet sheet 50, and the coil 20 is placed in the through groove, and an elastic sheet 51 is provided under the ring-shaped magnet sheet 50. The PCB assembly 30, the ring-shaped magnet sheet 50, the coil 20 and the elastic sheet 51 are respectively arranged in the shell, and the upper end surface of the ring-shaped magnet sheet 50 is in contact with the shell.

[0033] In this embodiment, a notch 13 is provided to expose the entire welding wire position, i.e., welding point 32, on the shell. This ensures that when welding the wire, there is no obstruction around the welding point 32 and the shell will not be touched, thereby reducing the probability of short circuit and improving safety performance.

[0034] In one embodiment, referring to FIG. 1 and FIG. 2 , the number of the aforementioned welding points 3220 is at least two.

[0035] In one embodiment, referring to FIG. 1 and FIG. 2 , the housing includes an upper cover 10 and a bottom shell 11 . The lower end surface of the upper cover 10 is provided with an opening, and the bottom shell 11 covers the opening. The bottom shell 11 is provided with a notch 13 .

[0036] In one embodiment, referring to FIG. 1 and FIG. 2 , a cavity is formed between the upper cover 10 and the bottom shell 11 , and the PCB assembly 30 , the annular magnet sheet 50 , the coil 20 and the elastic sheet 51 are respectively placed in the cavity, and the notch 13 is connected to the cavity.

[0037] In one embodiment, referring to FIG. 1 and FIG. 2 , the PCB assembly 30 includes a PCB board, and the PCB board is placed in the cavity via fasteners.

[0038] In one embodiment, referring to FIG. 1 , the solder joints 32 are disposed on a PCB.

[0039] The wire is welded through the welding point 32 to achieve the purpose of welding, and the notch 13 is used to completely expose the position where the entire welding point 32 is located. Compared with the groove method, it is not easy to contact the shell during welding because it is farther away from the shell, and it is not easy to short-circuit, which has high safety performance.

[0040] Please refer to Figure 4, which is a schematic diagram of the three-dimensional structure of a magnetic wireless charging module provided in Example 2 of the present invention; the difference between the magnetic wireless charging module provided in this embodiment and the magnetic wireless charging module provided in Example 1 is that:

[0041] Based on the magnetic wireless charging module of the first embodiment, this embodiment further adds a power strip 110;

[0042] Please refer to FIG. 4 . The magnetic wireless charging module further includes a power strip 110 . The PCB assembly 30 is provided with a wire bonding hole 31 . The power strip 110 is connected to the wire bonding hole 31 .

[0043] In one embodiment, referring to FIG. 4 , the wire hole 31 is located at the notch 13 , and the power strip 110 is located at the notch 13 .

[0044] A welding hole 31 is added during the design of the PCB board. At the same time, if the user does not need to weld wires, a socket 110 can also be welded to enrich the wireless charging function.

[0045] By setting a notch 13 on the shell, the solder joint 32 on the PCB assembly 30 is placed in the notch 13 and is completely exposed, so that it is not easy to contact the shell during welding, it is not easy to short-circuit, and the safety performance is high. In addition, a power strip 110 can be added, and the method of welding wires or welding the power strip 110 can be selected according to user needs to enrich the function of wireless charging.

[0046] In one embodiment, referring to FIG. 1 and FIG. 2 , the PCB assembly 30 is provided with a first positioning hole 33 , and the housing is provided with a second positioning hole 12 . The first positioning hole 33 is aligned with the second positioning hole 12 .

[0047] In this embodiment, a first positioning hole 33 is provided on the PCB board, and a second positioning hole 12 is provided on the housing. When the first positioning hole 33 and the second positioning hole 12 are relative to each other, the precise positioning of the PCB assembly 30 and the housing is ensured. At the same time, the coil 20 is fixed on the PCB assembly 30, and the annular magnet sheet 50 is fixed by the housing. At the same time, it is ensured that the concentric axes of the coil 20, PCB assembly 30, housing and annular magnet sheet 50 are on the same center line, thereby ensuring that the wireless charging mold product and the receiving end product are on the same center line, thereby achieving the purpose of improving charging efficiency.

[0048] In one embodiment, referring to FIG. 2 , the magnetic wireless charging module further includes a ferrite block 70 , a first heat dissipation component, and a second heat dissipation component. The ferrite block 70 is placed in the coil 20 , and the first heat dissipation component is located below the ferrite block 70 ; the PCB assembly 30 is located above the second heat dissipation component; and the first heat dissipation component is located above the PCB assembly 30 .

[0049] In this embodiment, the heat generated by the coil 20 is first conducted longitudinally through the ferrite block 70 and then dissipated transversely through the first heat dissipation component, so that the heat dissipation of the coil 20 is uniform; the heat dissipation of the PCB component 30 is dissipated through the second heat dissipation component. Multiple heat dissipation components are set in the wireless charging module to improve the heat dissipation effect.

[0050] In one embodiment, referring to FIG. 2 and FIG. 3 , the first heat dissipation component includes a shock-absorbing cotton 60 and a first graphite sheet 80 . The shock-absorbing cotton 60 is located below the ferrite magnet block 70 , and the first graphite sheet 80 is located below the shock-absorbing cotton 60 .

[0051] In one embodiment, referring to FIG. 2 and FIG. 3 , the first graphite sheet 80 is located above the PCB assembly 30 .

[0052] In one embodiment, referring to FIG. 2 and FIG. 3 , the coil 20 is wrapped around the outer periphery of the ferrite block 70 .

[0053] The coil 20 dissipates heat mainly through the ferrite magnet to the shockproof cotton 60 and then to the first graphite sheet 80. Among them, the ferrite magnet block 70 is longitudinally conductive, while the first graphite sheet 80 is transverse, so that the coil 20 dissipates heat evenly.

[0054] In one embodiment, referring to FIG. 1 and FIG. 2 , the second heat dissipation assembly includes a heat conductive block 90 and a second graphite sheet 100 . The heat conductive block 90 is located below the PCB assembly 30 , and the second graphite sheet 100 is located below the heat conductive block 90 .

[0055] In one embodiment, referring to FIG. 2 and FIG. 3 , the heat conductive block 90 includes a heat conductive silicone grease block.

[0056] The PCB assembly 30 dissipates heat through the heat-conducting block 90 to the second graphite sheet 100 and then to the housing, thereby achieving heat dissipation.

[0057] By setting up a ferrite block 70, a first heat dissipation component and a second heat dissipation component, the ferrite block 70 is used to transfer the heat generated by the coil 20 longitudinally, and the first heat dissipation component is used to dissipate the heat laterally, so that the coil 20 dissipates heat evenly, and the second heat dissipation component is used to dissipate heat from the PCB component 30. Multiple heat dissipation components are placed together to improve the heat dissipation effect of the wireless charging module.

[0058] In one embodiment, referring to Figures 2 and 3 , shock-absorbing cotton 60 is placed beneath the coil 20. The shock-absorbing cotton 60 beneath the coil 20 is soft and deformable by pressing down firmly. This allows the coil 20 to be placed flat against the housing, shortening the charging distance and ensuring consistent product quality each time. This ensures consistency across the wireless charging module and improves charging efficiency.

[0059] In one embodiment, referring to FIG. 2 , a through hole is defined in the middle of the elastic sheet 51 , and the shock-absorbing cotton 60 is placed in the through hole.

[0060] In one embodiment, referring to FIG. 2 and FIG. 3 , the magnetic wireless charging module capable of improving charging efficiency further includes a PCB assembly 30 . The PCB assembly 30 is disposed in the housing and below the shock-absorbing cotton 60 .

[0061] In one embodiment, referring to FIG. 2 and FIG. 3 , the PCB assembly 30 is provided with a first positioning hole 33 , and the housing is provided with a second positioning hole 12 . The first positioning hole 33 is aligned with the second positioning hole 12 .

[0062] In this embodiment, the PCB assembly 30 is provided with a first positioning hole 33, and the housing is provided with a second positioning hole 12. When the first positioning hole 33 and the second positioning hole 12 are relative to each other, the precise positioning of the PCB assembly 30 and the housing is ensured. At the same time, the coil 20 is fixed on the PCB assembly 30, and the annular magnet sheet 50 is fixed by the housing. At the same time, it is ensured that the concentric axes of the coil 20, PCB assembly 3030, housing and annular magnet sheet 50 are on the same center line, thereby ensuring that the wireless charging mold product and the receiving end product are on the same center line, thereby achieving the purpose of improving charging efficiency.

[0063] In one embodiment, referring to FIG. 2 , the elastic sheet 51 is, but is not limited to, a silicone sheet.

[0064] In one embodiment, referring to FIG. 2 , the number of the first positioning holes 33 is at least two.

[0065] In one embodiment, referring to FIG. 2 , the number of the second positioning holes 12 is at least two.

[0066] The numbers of the first positioning holes 33 and the second positioning holes 12 are consistent. Of course, in other embodiments, the numbers of the first positioning holes 33 and the second positioning holes 12 may also be inconsistent.

[0067] By setting an elastic sheet 51 under the annular magnet sheet 50, when the side of the shell close to the elastic sheet 51 is not flat, the elasticity of the elastic sheet 51 can make the annular magnet sheet 50 stick well to the shell, thereby improving the performance of the module's magnetic attraction force control and improving the charging efficiency.

[0068] The bracket 4020 is connected to the module body through a detachable structure to achieve a fixing method of the bracket 4020. When the bracket 4020 is not needed, a separate module body can be used. At this time, it needs to be fixed by adding glue, so that different fixing methods can be used to meet the needs of different users.

[0069] Please refer to Figure 1. The magnetic wireless charging module mentioned above is the QI2.0-MPP magnetic wireless charging module.

[0070] Please refer to FIG5 . When the bracket 40 is not used, glue is added to the housing to fix the entire wireless charging module.

[0071] In one embodiment, referring to FIG. 1 , the detachable structure includes a fastener.

[0072] In one embodiment, referring to FIG. 1 and FIG. 2 , the bottom shell 11 and the bracket 40 are connected via fasteners.

[0073] In one embodiment, referring to FIG. 1 , the number of the brackets 40 is at least four.

[0074] In one embodiment, referring to FIG. 1 , the bracket 40 is provided with mounting holes for mounting with external devices via screws, thereby achieving fast and convenient installation of the wireless charging module without the need for glue.

[0075] When the bracket 40 is needed, the bracket 40 is installed on the housing using a detachable structure. When the bracket 40 is needed, the bracket 40 can be removed and fixed with glue, so that different fixing methods can be used to meet the needs of different users.

[0076] The module of this embodiment can add a power strip 110, and can also be soldered, and short circuit is not easy to occur during soldering. An outer cover can be added or not, and it can be fixed with screws or glue. The magnetic suction force is well controlled, the positioning is precise, the charging efficiency is high, the heat dissipation is good, the design is thin and space-saving, and it is convenient for any scene. The PCB board can be fixed with screws and fits all shells. The magnetic wireless charging module can be added with an outer cover, mainly using a shrinkage process, with low mold investment and convenient production. If the customer requires an outer cover, it can be removed. It can be customized according to the customer's requirements to meet various needs.

[0077] In order to reduce the height, countersunk holes were made on the PCB board, thereby reducing the height of the product to about 6MM. The PCB launch board and mainboard can be fixed with screws to match all the shells.

[0078] The above-mentioned magnetic wireless charging module is provided with a notch 13 on the shell. The notch 13 can completely expose the welding point 32 during welding, and an elastic sheet 51 is provided so that the annular magnet sheet 50 can fit the shell. The bracket 40 can be selected for installation according to actual conditions, so that the shell is not easily contacted during welding, short circuit is not easy, and the safety performance is high. Different fixing methods can be adopted to meet the needs of different users, improve the performance of the module's magnetic attraction force control, and improve the charging efficiency.

[0079] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A magnetic wireless charging module, characterized in that: include: A shell, a bracket, a ring-shaped magnet sheet, a coil and a PCB assembly, wherein the shell is provided with a notch, the PCB assembly is provided with a soldering point, and the soldering point is placed in the notch; the shell and the bracket are connected with a detachable structure; a through groove is provided in the middle of the ring-shaped magnet sheet, the coil is placed in the through groove, an elastic sheet is provided under the ring-shaped magnet sheet, the PCB assembly, the ring-shaped magnet sheet, the coil and the elastic sheet are respectively arranged in the shell, and the upper end surface of the ring-shaped magnet sheet abuts against the shell.

2. The magnetic wireless charging module according to claim 1, characterized in that: The housing comprises an upper cover and a bottom shell. The lower end surface of the upper cover is provided with an opening. The bottom shell is sealed at the opening. The bottom shell is provided with the notch.

3. The magnetic wireless charging module according to claim 2, characterized in that: A cavity is formed between the upper cover and the bottom shell, the PCB assembly, the annular magnet sheet, the coil and the elastic sheet are respectively placed in the cavity, and the notch is connected to the cavity.

4. The magnetic wireless charging module according to claim 3, characterized in that: It also includes a power strip, and the PCB component is provided with a welding wire hole, and the power strip is connected to the welding wire hole.

5. The magnetic wireless charging module according to claim 4, characterized in that: The welding wire hole is arranged at the notch, and the power strip is arranged at the notch.

6. The magnetic wireless charging module according to claim 1, characterized in that: The PCB assembly is provided with a first positioning hole, the housing is provided with a second positioning hole, and the first positioning hole is aligned with the second positioning hole.

7. The magnetic wireless charging module according to claim 1, characterized in that: It also includes a ferrite block, a first heat dissipation component and a second heat dissipation component. The ferrite block is placed in the coil, the first heat dissipation component is located below the ferrite block; the PCB component is located above the second heat dissipation component; the first heat dissipation component is located above the PCB component.

8. The magnetic wireless charging module according to claim 7, characterized in that: The first heat dissipation component includes shockproof cotton and a first graphite sheet. The shockproof cotton is located below the ferrite magnet block, and the first graphite sheet is located below the shockproof cotton; the first graphite sheet is located above the PCB component.

9. The magnetic wireless charging module according to claim 7, characterized in that: The coil is wrapped around the outer circumference of the ferrite block.

10. The magnetic wireless charging module according to claim 7, characterized in that: The second heat dissipation component includes a heat conductive block and a second graphite sheet. The heat conductive block is located below the PCB component, and the second graphite sheet is located below the heat conductive block.

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