Wireless charging module

Abstract

A wireless charging module (30, 40, 50, 60, 70), comprising a magnetic core (31, 41, 51, 61, 71), a coil (32, 42, 52, 62, 72), and a magnetic tape (T). The coil (32, 42, 52, 62, 72) and the magnetic tape (T) are disposed on a surface of the magnetic core (31, 41, 51, 61, 71) and surround a central axis (Z6, Z7) of the magnetic core (31, 41, 51, 61, 71). A curved section (T1) of the magnetic tape (T) is located between each two adjacent curved portions (621, 721) of the coil (32, 42, 52, 62, 72) in a horizontal direction, and the horizontal direction is perpendicular to the central axis (Z6, Z7).

Description

Wireless charging module TECHNICAL FIELD

[0001] The present invention relates to a wireless charging module. More particularly, the present invention relates to a wireless charging module with magnetic glue. BACKGROUND

[0002] First, please refer to FIG. 1, wherein FIG. 1 shows a cross-sectional view of a general wireless charging device in use.

[0003] As shown in FIG. 1, a general wireless charging device mainly comprises a wireless charging receiving end 10 and a wireless charging transmitting end 20, wherein a coil 12 is provided on a magnetic core 11 of the wireless charging receiving end 10, and the coil 12 is electrically connected to a battery B to be charged; in addition, a corresponding coil 22 is provided on a magnetic core 21 of the wireless charging transmitting end 20, wherein when an external power source passes a current signal into the coil 22, the coil 12 in the wireless charging receiving end 10 can generate an induced voltage, thereby charging the battery B.

[0004] However, the conventional wireless charging device is often limited in structure and size, resulting in poor magnetic coupling coefficient of the coils 12, 22, and the induced voltage generated by the coil 12 of the wireless charging receiving end 10 cannot be effectively improved; on the other hand, as the requirement for output power increases, the size of the magnetic cores 11, 21 must also be increased, which easily leads to the product size being unable to be reduced, causing inconvenience in use.

[0005] Therefore, how to design a wireless charging module that can balance high charging efficiency and miniaturization has become an important challenge for researchers in this technical field. SUMMARY

[0006] In view of the foregoing problems, an embodiment of the present invention provides a wireless charging module, comprising a magnetic core, a coil, and a magnetic tape. The coil is arranged on a surface of the magnetic core and surrounds a central axis of the magnetic core. The magnetic tape surrounds the central axis of the magnetic core, wherein a bending section of the magnetic tape is located between a plurality of bending portions of the coil in a horizontal direction, and the horizontal direction is perpendicular to the central axis.

[0007] In an embodiment, the bending section of the magnetic tape contacts the bending portions of the coil.

[0008] In an embodiment, the magnetic tape is bonded to one side of the coil and surrounds the central axis of the magnetic core.

[0009] In one embodiment, the magnetic tape is attached to an outer surface of the coil and surrounds the central axis of the magnetic core.

[0010] In one embodiment, the magnetic tape is attached to an inner surface of the coil and surrounds the central axis of the magnetic core.

[0011] In one embodiment, the plurality of curved segments of the magnetic tape and the curved portions of the coil are staggered along the horizontal direction.

[0012] In one embodiment, the magnetic core has a protruding portion, an annular barrier portion, and an annular groove, and the groove is formed between the barrier portion and the protruding portion.

[0013] In one embodiment, the protruding portion is located at the center of the magnetic core.

[0014] In one embodiment, the surface is a bottom surface of the groove, and the coil and the magnetic tape are disposed in the groove.

[0015] In one embodiment, the magnetic tape has a high magnetic permeability material.

[0016] One embodiment of the present application further provides a wireless charging module, comprising a magnetic core, a coil, and a magnetic element. The coil is disposed on a surface of the magnetic core and surrounds a central axis of the magnetic core. The magnetic element is disposed on the surface of the magnetic core and contacts the coil, wherein a portion of the magnetic element is located between a plurality of curved portions of the coil in a horizontal direction, and the horizontal direction is perpendicular to the central axis.

[0017] In one embodiment, the magnetic element comprises a magnetic tape.

[0018] In one embodiment, the magnetic tape is attached to a side of the coil and surrounds the central axis of the magnetic core.

[0019] In one embodiment, the plurality of curved segments of the magnetic tape and the curved portions of the coil are staggered along the horizontal direction.

[0020] In one embodiment, the magnetic element comprises a magnetic adhesive filled in a gap between the magnetic core and the coil.

[0021] One embodiment of the present application further provides a wireless charging module, comprising a magnetic core, a coil, and a magnetic adhesive. The coil is disposed on the magnetic core and electrically connected to an external power source, and at least one gap is formed between the magnetic core and the coil. The magnetic adhesive is filled in the gap to attach the magnetic core and the coil.

[0022] In one embodiment, the wireless charging module further comprises a magnetic tape disposed on the magnetic core and surrounding a central axis of the magnetic core, a curved segment of the magnetic tape is located between the plurality of curved portions of the coil in a horizontal direction, and the horizontal direction is perpendicular to the central axis. BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 shows a cross-sectional view of a commonly known wireless charging device in use.

[0024] FIG. 2 shows a perspective view of a wireless charging module 30 according to one embodiment of the present application.

[0025] FIG. 3 shows an exploded view of the wireless charging module 30 in FIG. 2.

[0026] FIG. 4 shows a cross-sectional view along the line segment A1-A2 in FIG. 2.

[0027] FIG. 5 shows another cross-sectional view along the line segment A1-A2 in FIG. 2.

[0028] FIG. 6 shows a schematic view of the magnetic glue G coated on the surface of the groove 312 of the magnetic core 31.

[0029] FIG. 7 shows a schematic view of the magnetic glue G coated on the bottom surface 3121 and the side surface 3122 of the groove 312.

[0030] FIG. 8 shows a perspective view of a wireless charging module 40 according to another embodiment of the present application.

[0031] FIG. 9 shows an exploded view of the wireless charging module 40 in FIG. 8.

[0032] FIG. 10 shows a cross-sectional view along the line segment A3-A4 in FIG. 8.

[0033] FIG. 11 shows another cross-sectional view along the line segment A3-A4 in FIG. 8.

[0034] FIG. 12 shows a perspective view of a wireless charging module 50 according to another embodiment of the present application.

[0035] FIG. 13 shows an exploded view of the wireless charging module 50 in FIG. 12.

[0036] FIG. 14 shows a cross-sectional view along the line segment A5-A6 in FIG. 12.

[0037] FIG. 15 shows another cross-sectional view along the line segment A5-A6 in FIG. 12.

[0038] FIG. 16 shows a schematic view of the magnetic glue G coated on the surface S of the magnetic core 51.

[0039] FIG. 17 shows a cross-sectional view of a wireless charging module 60 according to another embodiment of the present application.

[0040] Fig. 18 shows a schematic view of the magnetic tape T adhered to the outer side surface of the coil 62 in Fig. 17.

[0041] Fig. 19 shows a partial cross-sectional enlarged view of the plurality of curved segments T1 of the magnetic tape T and the plurality of curved portions 621 of the coil 62 staggered along the X-axis direction.

[0042] Fig. 20 shows a partial cross-sectional enlarged view of the magnetic glue G applied to the surface S of the magnetic core 61 and firmly adhering the magnetic core 61, the coil 62, and the magnetic tape T.

[0043] Fig. 21 shows a cross-sectional view of a wireless charging module 70 according to another embodiment of the present application.

[0044] Fig. 22 shows a cross-sectional view of the magnetic tape T adhered to the inner side surface of the coil 72 in Fig. 21.

[0045] Fig. 23 shows a partial cross-sectional enlarged view of the plurality of curved segments T1 of the magnetic tape T and the plurality of curved portions 721 of the coil 72 staggered along the X-axis direction.

[0046] Fig. 24 shows a partial cross-sectional enlarged view of the magnetic glue G applied to the bottom surface of the groove 712 of the magnetic core 71 and firmly adhering the magnetic core 71, the coil 72, and the magnetic tape T.

[0047] Reference Signs: 10: wireless charging receiving end 11: magnetic core 12: coil 20: wireless charging transmitting end 21: magnetic core 22: coil 30: wireless charging module 31: magnetic core 311: barrier portion 312: groove 3121: bottom surface 3122: side surface 313: opening 314: protruding portion 32: coil 40: wireless charging module 41: magnetic core 411: barrier portion 412: groove 4121: bottom surface 4122: side surface 413: opening 414: protruding portion 415: perforation 42: coil 50: wireless charging module 51: magnetic core 515: perforation 52: coil 60: wireless charging module 61: magnetic core 614: protruding portion 62: coil 621: curved portion 70: wireless charging module 71: magnetic core 711: barrier portion 712: groove 714: protruding portion 72: coil 721: curved portion B: battery G: magnetic glue S: surface T: magnetic tape T': magnetic element T1: curved segment Z6: central axis Z7: central axis DETAILED DESCRIPTION

[0048] The following describes a wireless charging module according to an embodiment of the present application. However, it can be readily appreciated that the embodiments of the present application provide many suitable inventive concepts that can be implemented in a wide variety of specific contexts. The specific embodiments disclosed are merely illustrative of the way in which the present application can be used in a particular manner and are not intended to limit the scope of the present application.

[0049] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an overly idealized or overly formal sense unless expressly so defined herein.

[0050] The foregoing and other technical features, aspects and effects of the present application will be more fully understood from the following detailed description, taken in conjunction with the accompanying drawings, in which preferred embodiments of the present application are shown. Directional terms, such as upper, lower, left, right, front or rear, etc., mentioned in the following embodiments are used to refer to directions of the accompanying drawings. Therefore, the directional terms used in the embodiments are used to explain, not to limit, the present application.

[0051] Please refer to FIG. 2, 3, 4, 5, wherein FIG. 2 shows a perspective view of a wireless charging module 30 of an embodiment of the present application, FIG. 3 shows an exploded view of the wireless charging module 30 in FIG. 2, FIG. 4 shows a cross-sectional view along line A1-A2 in FIG. 2, and FIG. 5 shows another cross-sectional view along line A1-A2 in FIG. 2.

[0052] As shown in FIG. 2, 3, 4, 5, the wireless charging module 30 of an embodiment of the present application is mainly used as a wireless charging transmitter, which can be used with a wireless charging receiver, thereby performing wireless power charging on a battery.

[0053] Specifically, the wireless charging module 30 includes a magnetic core 31 and at least one coil 32, wherein the magnetic core 31 forms a ring-shaped barrier wall portion 311, a ring-shaped groove 312, an opening 313, and a protrusion 314 in the center of the magnetic core 31. Specifically, the opening 313 is formed on the barrier wall portion 311, and the groove 312 is formed between the barrier wall portion 311 and the protrusion 314.

[0054] In actual assembly, the coil 32 can be arranged in the groove 312 of the magnetic core 31 and surround the protrusion 314, wherein the two ends of the coil 32 can pass through the opening 313 and be connected to an external power source (not shown), and the external power source can pass current into the coil 32, thereby generating a charging magnetic field in the wireless charging module 30. It should be understood that the coil 32 can have a single-layer or multi-layer structure, and is not limited to the disclosed embodiment of the present application.

[0055] Referring to FIG. 6, FIG. 6 shows a schematic view of the magnetic glue G coated on the surface of the recess 312 of the magnetic core 31.

[0056] As shown in FIG. 6, in order to make the coil of the wireless charging receiving end generate a higher induced voltage, the surface of the recess 312 of the magnetic core 31 in the embodiment is provided with the magnetic glue G, wherein the magnetic glue G contains magnetic permeable material.

[0057] It should be particularly pointed out that, in addition to the function of bonding the coil 32 and the magnetic core 31, the magnetic glue G can also effectively improve the magnetic field strength of the wireless charging module 30 in the Z-axis direction (vertical direction), thereby greatly increasing the charging power and efficiency of the wireless charging module 30, and also helping to realize the miniaturization of the magnetic core 31 and the wireless charging module 30.

[0058] For example, the coil 32 can be a planar coil, and the magnetic glue G can contain ferrite material, iron alloy material, amorphous alloy material, nanocrystalline alloy material, or other magnetic glue or magnetic powder with high magnetic permeability, and is not limited to the disclosed embodiment of the present application.

[0059] As can be seen from FIG. 6, the coil 32 is arranged on the bottom surface 3121 of the recess 312 of the magnetic core 31, and the magnetic glue G can cover the bottom surface 3121. In addition, the magnetic glue G can also extend from the bottom surface 3121 to the side surface 3122 of the recess 312 to ensure that the coil 32 and the magnetic core 31 have sufficient bonding strength, wherein the side surface 3122 is adjacent to the bottom surface 3121.

[0060] It should be particularly pointed out that, although the magnetic glue G in the embodiment can cover the bottom surface 3121 of the recess 312 and completely cover the bottom side of the coil 32, the magnetic glue G does not cover the entire side surface 3122 of the recess 312, and does not cover the top surface of the coil 32, thereby enabling the wireless charging module 30 to generate a better magnetic field strength in the Z-axis direction (vertical direction).

[0061] Referring to FIG. 7, FIG. 7 shows a schematic view of the magnetic glue G covering the bottom surface 3121 and the side surface 3122 of the recess 312.

[0062] As shown in FIG. 7, in another embodiment of the present application, the magnetic glue G can also be applied to cover the bottom surface 3121 and the side surface 3122 of the groove 312, thereby fixing the coil 32 of the multi-layer structure in the groove 312 of the magnetic core 31 at the same time. It should be particularly pointed out that the magnetic glue G in this embodiment is approximately the same height as the coil, but does not cover the top surface of the coil 32, thereby ensuring that the wireless charging module 30 can have a better magnetic field strength in the Z-axis direction (vertical direction), so that the coil of the wireless charging receiving end can generate a higher induced voltage, thereby greatly improving the charging power and efficiency of the wireless charging module 30.

[0063] Next, please refer to FIGS. 8, 9, 10, and 11, wherein FIG. 8 shows a perspective view of a wireless charging module 40 according to another embodiment of the present application, FIG. 9 shows an exploded view of the wireless charging module 40 in FIG. 8, FIG. 10 shows a cross-sectional view along the line segment A3-A4 in FIG. 8, and FIG. 11 shows another cross-sectional view along the line segment A3-A4 in FIG. 8.

[0064] As shown in FIGS. 8, 9, 10, and 11, the wireless charging module 40 according to another embodiment of the present application includes a magnetic core 41 and at least one coil 42, wherein the magnetic core 41 is formed with a barrier portion 411, a ring-shaped groove 412, an opening 413, a protruding portion 414, and a through hole 415. Specifically, the protruding portion 414 is ring-shaped and surrounds the through hole 415 in the center of the magnetic core 41, the opening 413 is formed on the barrier portion 411, and the groove 412 is formed between the barrier portion 411 and the protruding portion 414.

[0065] In actual assembly, the coil 42 can be arranged in the groove 412 of the magnetic core 41, and magnetic glue can be applied to the bottom surface 4121 of the groove 412 (FIG. 11), wherein the magnetic glue can also extend from the bottom surface 4121 to the side surface 4122 of the groove 412 (FIG. 11) without covering the top surface of the coil 42, thereby ensuring that the wireless charging module 40 can have a better magnetic field strength in the Z-axis direction (vertical direction), so that the coil of the wireless charging receiving end can generate a higher induced voltage, thereby greatly improving the charging power and efficiency of the wireless charging module 40.

[0066] Next, please refer to FIGS. 12, 13, 14, 15, and 16, wherein FIG. 12 shows a perspective view of a wireless charging module 50 according to another embodiment of the present application, FIG. 13 shows an exploded view of the wireless charging module 50 in FIG. 12, FIG. 14 shows a cross-sectional view along the line segment A5-A6 in FIG. 12, FIG. 15 shows another cross-sectional view along the line segment A5-A6 in FIG. 12, and FIG. 16 shows a schematic view of magnetic glue G applied to a surface S of a magnetic core 51.

[0067] As shown in FIGS. 12, 13, 14, 15, and 16, the wireless charging module 50 of another embodiment of the present application includes a planar magnetic core 51 and at least one coil 52, wherein the magnetic core 51 is formed with a through-hole 515. In actual assembly, the coil 52 can be disposed on the surface S of the magnetic core 51 and surround the through-hole 515, and a magnetic adhesive G is disposed on the surface S of the magnetic core 51 to bond the magnetic core 51 and the coil 52.

[0068] It is particularly noted that the magnetic adhesive G in this embodiment does not cover the top surface of the coil 32, thereby ensuring that the wireless charging module 50 can have a better magnetic field strength in the Z-axis direction (vertical direction), so that the coil of the wireless charging receiving end can generate a higher induced voltage, thereby greatly improving the charging power and efficiency of the wireless charging module 50.

[0069] FIG. 17 shows a cross-sectional view of a wireless charging module 60 of another embodiment of the present application, FIG. 18 shows a schematic view of a magnetic tape T adhered to the outer surface of a coil 62, and FIG. 19 shows a partial cross-sectional enlarged view of a plurality of curved segments T1 of the magnetic tape T and a plurality of curved portions 621 of the coil 62 staggered in the X-axis direction.

[0070] As shown in FIG. 17, the wireless charging module 60 of this embodiment includes a planar magnetic core 61, a coil 62, and a magnetic tape T, wherein the coil 62 is connected to an external power source (not shown), and the magnetic core 61 is formed with a protrusion 614 at the center. In actual assembly, the coil 62 and the magnetic tape T are disposed on the surface S of the magnetic core 61 and surround the central axis Z6 of the magnetic core 61, wherein the central axis Z6 is parallel to the Z-axis direction.

[0071] As shown in FIG. 18, in the assembly process of the wireless charging module 60, the magnetic tape T can be first adhered to the outer surface of the coil 62, and then the magnetic tape T and the coil 62 can be wrapped around the protrusion 614 and the central axis Z6 (as shown in FIGS. 17 and 19). For example, the magnetic tape T can be a single-sided or double-sided tape containing a high-permeability material.

[0072] Through the structural design as shown in FIGS. 17 and 19, the plurality of curved segments T1 of the magnetic tape T and the plurality of curved portions 621 of the coil 62 are staggered in the horizontal direction (X-axis direction) after assembly, wherein by making the curved segments T1 of the magnetic tape T contact and be clamped between adjacent curved portions 621 of the coil 62, the magnetic field strength of the wireless charging module 60 can be improved, thereby greatly improving the charging power and efficiency of the wireless charging module 60.

[0073] In addition, a ring-shaped magnetic element T' (e.g., another magnetic tape) is disposed on the surface S of the magnetic core 61 and is located inside the coil 62, thereby further increasing the magnetic flux density near the center of the wireless charging module 60. It should be understood that the aforementioned coil 62 is located between the magnetic tape T and the aforementioned magnetic element T' in the horizontal direction (X-axis direction), so that the magnetic field uniformity of the wireless charging module 60 can be greatly improved, and the charging efficiency of the wireless charging module 60 can be improved.

[0074] FIG. 20 shows a partial cross-sectional enlarged view of the magnetic glue G coated on the surface S of the magnetic core 61 and firmly bonding the magnetic core 61, the coil 62, and the magnetic tape T.

[0075] As shown in FIG. 20, in another embodiment of the present application, the magnetic glue G can also be coated on the surface S of the magnetic core 61, so that the magnetic field strength of the wireless charging module 60 can be further improved.

[0076] It should be understood that in the present embodiment, at least a portion of the magnetic glue G is applied between the adjacent bending portions 621 of the coil 62, so that the magnetic core 61, the coil 62, and the magnetic tape T can be firmly bonded to each other to prevent the coil 62 and the magnetic tape T from falling off the magnetic core 61.

[0077] FIG. 21 shows a cross-sectional view of a wireless charging module 70 according to another embodiment of the present application. FIG. 22 shows a cross-sectional view of the magnetic tape T adhered to the inner surface of the coil 72 in FIG. 21. FIG. 23 shows a partial cross-sectional enlarged view of the plurality of bending segments T1 of the magnetic tape T and the plurality of bending portions 721 of the coil 72 staggered in the X-axis direction.

[0078] As shown in FIG. 21, the wireless charging module 70 according to the present embodiment includes a magnetic core 71, a coil 72, and a magnetic tape T. The coil 72 is connected to an external power source (not shown), and the magnetic core 71 is formed with a barrier portion 711, a ring-shaped groove 712, and a protruding portion 714 located at the center of the magnetic core 71. Specifically, the groove 712 is formed between the barrier portion 711 and the protruding portion 714. In actual assembly, the coil 72 and the magnetic tape T can be disposed on the bottom surface of the groove 712 of the magnetic core 71 and made to surround the center axis Z7 of the magnetic core 71, which is parallel to the Z-axis direction.

[0079] As shown in FIG. 22, in the assembly process of the wireless charging module 70, the magnetic tape T can be first adhered to the inner surface of the coil 72, and then the magnetic tape T and the coil 72 can be made to surround the protruding portion 714 and the center axis Z7 (as shown in FIGS. 21 and 23). For example, the magnetic tape T can be a single-sided or double-sided tape containing a high-permeability material.

[0080] By the structural design as shown in Figs. 21 and 23, the plurality of curved segments T1 of the aforementioned magnetic tape T and the plurality of curved portions 721 of the aforementioned coil 72 are staggered in the horizontal direction (X-axis direction) after assembly, and by making the curved segments T1 of the magnetic tape T contact and be sandwiched between adjacent curved portions 721 of the coil 72, the magnetic field strength of the wireless charging module 70 can be improved, thereby greatly improving the charging power and efficiency of the wireless charging module 70.

[0081] It should be particularly noted that the outermost curved portion 721 of the coil 72 is located between the magnetic tape T and the barrier portion 711 of the magnetic core 71 after assembly, thereby improving the magnetic flux density and magnetic field uniformity around the wireless charging module 70, and greatly improving the efficiency of the wireless charging module 70.

[0082] Fig. 24 shows a partial cross-sectional enlarged view of the magnetic glue G coated on the bottom surface of the groove 712 of the magnetic core 71 and firmly bonding the magnetic core 71, the coil 72 and the magnetic tape T.

[0083] As shown in Fig. 24, in another embodiment of the present application, the magnetic glue G can also be coated on the bottom surface of the groove 712 of the magnetic core 71, thereby further improving the magnetic field strength of the wireless charging module 70.

[0084] It should be understood that by applying at least a portion of the magnetic glue G between adjacent curved portions 721 of the coil 72, the present embodiment can also firmly bond the magnetic core 71, the coil 72 and the magnetic tape T to each other to prevent the coil 72 and the magnetic tape T from falling off the magnetic core 71.

[0085] In summary, the present application provides a wireless charging module, wherein a magnetic element (such as magnetic glue and / or magnetic tape) containing a magnetic material is provided on the surface of the magnetic core of the wireless charging module. In one embodiment, the magnetic glue can be filled into the gap between the coil and the magnetic core; in addition, the magnetic tape can be attached to the inner or outer surface of the coil and wrapped around the central axis of the core during assembly, thereby greatly improving the charging efficiency of the wireless charging module.

[0086] The present application can effectively improve the charging magnetic field intensity of the wireless charging module by attaching the aforementioned magnetic element (e.g. magnetic glue and / or magnetic tape) on the coil, so that the coil of the wireless charging receiving end can generate a higher induced voltage, thereby greatly improving the charging power and efficiency of the wireless charging module. For example, the aforementioned magnetic glue can contain ferrite material, iron alloy material, amorphous alloy material, nanocrystalline alloy material, or other magnetic glue or magnetic powder with high magnetic permeability. The aforementioned magnetic tape T can be a single-sided or double-sided tape containing high magnetic permeability material.

[0087] It should be understood that the wireless charging module disclosed in the above embodiments can also be electrically connected to a battery as a wireless charging receiving end, and the charging power and efficiency of the wireless charging module can be improved by the aforementioned magnetic glue and / or magnetic tape, and is not limited to the embodiments disclosed in the present application.

[0088] Although the embodiments of the present application and their advantages have been disclosed as above, it should be understood that any person skilled in the art can make changes, substitutions and modifications without departing from the concept and scope of the present application. In addition, the scope of protection of the present application is not limited to the specific embodiments described in the specification, and any person skilled in the art can understand the current or future developed processes, machines, manufactures, compositions of matter, devices, methods and steps from the disclosure of the present application, as long as they can substantially achieve the same function or obtain substantially the same results as in the embodiments described herein. Therefore, the scope of protection of the present application includes the above processes, machines, manufactures, compositions of matter, devices, methods and steps. In addition, each application patent range constitutes an individual embodiment, and the scope of protection of the present application also includes each application patent range and the combination of embodiments.

[0089] Although the present application has been disclosed with preferred embodiments above, it is not intended to limit the present application, and any person skilled in the art can make some changes and modifications without departing from the concept and scope of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of the application patent range.

Claims

1. A wireless charging module, comprising: a magnetic core; a coil disposed on a surface of the magnetic core and surrounding a central axis of the magnetic core; and a magnetic tape surrounding the central axis of the magnetic core, wherein a curved segment of the magnetic tape is positioned between curved portions of the coil in a horizontal direction, and the horizontal direction is perpendicular to the central axis.

2. The wireless charging module of claim 1, wherein the curved segment of the magnetic tape contacts the curved portions of the coil.

3. The wireless charging module of claim 1, wherein the magnetic tape is attached to a side of the coil and surrounds the central axis of the magnetic core.

4. The wireless charging module of claim 1, wherein the magnetic tape is attached to an outer surface of the coil and surrounds the central axis of the magnetic core.

5. The wireless charging module of claim 1, wherein the magnetic tape is attached to an inner surface of the coil and surrounds the central axis of the magnetic core.

6. The wireless charging module of claim 1, wherein curved segments of the magnetic tape and the curved portions of the coil are staggered along the horizontal direction.

7. The wireless charging module of claim 1, wherein the magnetic core has a protrusion, an annular barrier portion, and an annular groove formed between the barrier portion and the protrusion.

8. The wireless charging module of claim 7, wherein the protrusion is located in the center of the magnetic core.

9. The wireless charging module of claim 7, wherein the surface is a bottom surface of the groove, and the coil and the magnetic tape are disposed in the groove.

10. The wireless charging module of claim 1, wherein the magnetic tape has a high magnetic permeability material.

11. A wireless charging module, comprising: a magnetic core; a coil disposed on a surface of the magnetic core and surrounding a central axis of the magnetic core; and a magnetic element disposed on the surface of the magnetic core and contacting the coil, wherein a portion of the magnetic element is positioned between curved portions of the coil in a horizontal direction, and the horizontal direction is perpendicular to the central axis.

12. The wireless charging module of claim 11, wherein the magnetic element comprises a magnetic tape.

13. The wireless charging module of claim 12, wherein the magnetic tape is attached to a side of the coil and surrounds the central axis of the magnetic core.

14. The wireless charging module of claim 12, wherein curved segments of the magnetic tape and the curved portions of the coil are staggered along the horizontal direction.

15. The wireless charging module of claim 11, wherein the magnetic element comprises a magnetic glue filled in a gap between the magnetic core and the coil.

16. A wireless charging module, comprising: a magnetic core; a coil disposed on the magnetic core and electrically connected to an external power source; at least one gap formed between the magnetic core and the coil; and a magnetic glue filled in the gap to attach the magnetic core and the coil. ​ ​ 17. The wireless charging module of claim 16, wherein the wireless charging module further comprises a magnetic tape disposed on the magnetic core and surrounding a central axis of the magnetic core, a curved segment of the magnetic tape being positioned between the plurality of curved portions of the coil in a horizontal direction that is perpendicular to the central axis.

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