Wireless power charging module

Abstract

A wireless charging module includes a magnetic core, a coil, and a magnetic tape. The coil and the magnetic tape are disposed on one surface of the magnetic core and surround a central axis of the magnetic core. A curved section of the magnetic tape is positioned in a horizontal direction between two adjacent curved portions of the coil, and the horizontal direction is perpendicular to the central axis.

Description

[Technical Field]

[0001] This invention relates to a wireless charging module. More specifically, this invention relates to a wireless charging module with magnetic adhesive. [Previous Technology]

[0002] Please refer to Figure 1 first, which shows a cross-sectional view of a common wireless charging device in use.

[0003] As shown in Figure 1, a common wireless charging device mainly includes a wireless charging receiver 10 and a wireless charging transmitter 20. A coil 12 is provided on the magnetic core 11 of the wireless charging receiver 10, and the aforementioned coil 12 can be electrically connected to the battery B to be charged. In addition, a corresponding coil 22 is provided on the magnetic core 21 of the wireless charging transmitter 20. When an external power source passes a current signal into the coil 22, the coil 12 located in the wireless charging receiver 10 can generate an induced voltage to charge the battery B.

[0004] However, traditional wireless charging devices are often limited by structure and size, resulting in poor magnetic coupling coefficient of coils 12 and 22, and the induced voltage generated by coil 12 of wireless charging receiver 10 cannot be effectively increased; on the other hand, as the requirements for output power continue to increase, the size of magnetic cores 11 and 21 must also be increased, which easily leads to the inability to reduce the size of the product and causes inconvenience in use.

[0005] In view of this, how to design a wireless charging module that can balance high charging efficiency and miniaturization has become an important challenge for researchers in this field. [Summary of the Invention]

[0006] In view of the aforementioned problems in conventional technology, one embodiment of the present invention provides a wireless charging module, including a magnetic core, a coil, and a magnetic tape. The coil is disposed 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 curved segment of the magnetic tape is positioned in a horizontal direction between a plurality of curved portions of the coil, and the horizontal direction is perpendicular to the central axis.

[0007] In one embodiment, the aforementioned curved section of the aforementioned magnetic tape contacts the aforementioned curved portion of the aforementioned coil.

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

[0009] In one embodiment, the aforementioned magnetic tape is adhered to the outer surface of one of the aforementioned coils and surrounds the aforementioned central axis of the aforementioned magnetic core.

[0010] In one embodiment, the aforementioned magnetic tape is adhered to the inner surface of one of the aforementioned coils and surrounds the aforementioned central axis of the aforementioned magnetic core.

[0011] In one embodiment, the plurality of curved segments of the aforementioned magnetic tape and the aforementioned curved portion of the aforementioned coil are arranged alternately along the aforementioned horizontal direction.

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

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

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

[0015] In one embodiment, the aforementioned magnetic tape has a highly magnetic material.

[0016] One embodiment of the present invention further provides a wireless charging module, including a magnetic core, a coil, and a magnetic element. The coil is disposed on one surface of the magnetic core and surrounds a central axis of the magnetic core. The magnetic element is disposed on the aforementioned surface of the magnetic core and contacts the coil, wherein a portion of the magnetic element is positioned in a horizontal direction between a plurality of bends of the coil, and the horizontal direction is perpendicular to the central axis.

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

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

[0019] In one embodiment, the plurality of bent segments of the aforementioned magnetic tape and the aforementioned bent portions of the aforementioned coil are arranged alternately along the aforementioned horizontal direction.

[0020] In one embodiment, the aforementioned magnetic element includes a magnetic adhesive that fills the gap between the aforementioned magnetic core and the aforementioned coil.

[0021] One embodiment of the present invention further provides a wireless charging module, including 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 fills the gap to bond the magnetic core and the coil together.

[0022] In one embodiment, the aforementioned wireless charging module further includes a magnetic tape disposed on the aforementioned magnetic core and surrounding one of the central axes of the aforementioned magnetic core, wherein a curved section of the aforementioned magnetic tape is located in a horizontal direction between a plurality of curved portions of the aforementioned coil, and the aforementioned horizontal direction is perpendicular to the aforementioned central axis.

Implementation Method

[0024] The following describes a wireless charging module according to an embodiment of the present invention. However, it will be readily apparent that the embodiments of the present invention provide many suitable inventive concepts and can be implemented in a wide range of specific contexts. The specific embodiments disclosed are merely illustrative of the use of the present invention in a particular manner and are not intended to limit the scope of the present invention.

[0025] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the context of this disclosure, and should not be interpreted in an idealized or overly formal manner, unless specifically defined herein.

[0026] The foregoing descriptions and other technical contents, features, and effects of this invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are merely for reference to the accompanying drawings. Therefore, the directional terms used in the embodiments are for illustrative purposes and not for limiting the invention.

[0027] Please refer to Figures 2, 3, 4 and 5 together, wherein Figure 2 shows a perspective view of a wireless charging module 30 according to an embodiment of the present invention, Figure 3 shows an exploded view of the wireless charging module 30 in Figure 2, Figure 4 shows a cross-sectional view along line segment A1-A2 in Figure 2, and Figure 5 shows another cross-sectional view along line segment A1-A2 in Figure 2.

[0028] As shown in Figures 2, 3, 4 and 5, the wireless charging module 30 of one embodiment of the present invention mainly serves as a wireless charging transmitter, which can be used in conjunction with a wireless charging receiver to wirelessly charge a battery.

[0029] Specifically, the aforementioned wireless charging module 30 includes a magnetic core 31 and at least one coil 32, wherein the magnetic core 31 forms an annular barrier portion 311, an annular groove 312, an opening 313, and a protrusion 314 located in the center of the magnetic core 31. Specifically, the opening 313 is formed on the barrier portion 311, and the groove 312 is formed between the barrier portion 311 and the protrusion 314.

[0030] In actual assembly, the coil 32 can be placed in the groove 312 of the magnetic core 31 and surround the protrusion 314. The two ends of the coil 32 can pass through the opening 313 and be connected to an external power source (not shown). The external power source can supply current to the coil 32, thereby causing the wireless charging module 30 to generate a charging magnetic field. It should be understood that the coil 32 can have a single-layer or multi-layer structure, and is not limited to those disclosed in the embodiments of the present invention.

[0031] Next, please refer to Figure 6, which shows a schematic diagram of magnetic adhesive G being coated on the surface of the groove 312 of the magnetic core 31.

[0032] As shown in Figure 6, in order to enable the coil of the wireless charging receiver to generate a higher induced voltage, magnetic adhesive G is provided on the surface of the groove 312 of the magnetic core 31 in this embodiment, wherein the aforementioned magnetic adhesive G contains a magnetic permeable material.

[0033] It should be noted that, in addition to bonding the coil 32 and the magnetic core 31, the aforementioned magnetic adhesive G can also effectively enhance the magnetic field strength of the wireless charging module 30 in the Z-axis direction (vertical direction), thereby significantly increasing the charging power and efficiency of the wireless charging module 30, and also helping to achieve the miniaturization of the magnetic core 31 and the wireless charging module 30.

[0034] For example, the aforementioned coil 32 may be a planar coil, and the aforementioned magnetic adhesive G may contain ferrite, alloy, amorphous, nanocrystalline or other magnetic adhesives or powders with high magnetic permeability, and is not limited to those disclosed in the embodiments of the present invention.

[0035] As can be seen from Figure 6, the aforementioned coil 32 is disposed on the bottom surface 3121 of the groove 312 of the magnetic core 31, and the magnetic adhesive G can cover the aforementioned bottom surface 3121; in addition, the aforementioned magnetic adhesive G can extend from the aforementioned bottom surface 3121 to the side surface 3122 of the groove 312 to ensure that there is sufficient bonding strength between the coil 32 and the magnetic core 31, wherein the aforementioned side surface 3122 is adjacent to the aforementioned bottom surface 3121.

[0036] It should be noted that although the magnetic adhesive G in this embodiment can cover the bottom surface 3121 of the groove 312 and completely cover the bottom side of the coil 32, the magnetic adhesive G does not cover the entire side surface 3122 of the groove 312, nor does it cover the top surface of the coil 32. This allows the wireless charging module 30 to generate a better magnetic field strength in the Z-axis direction (vertical direction).

[0037] Please refer to Figure 7, which shows a schematic diagram of the bottom surface 3121 and side surface 3122 of the groove 312 filled with magnetic adhesive G.

[0038] As shown in Figure 7, in another embodiment of the present invention, the magnetic adhesive G can also be applied to the bottom surface 3121 and side surface 3122 of the groove 312, thereby simultaneously fixing the multi-layered coil 32 within the groove 312 of the magnetic core 31. It should be noted that in this embodiment, the magnetic adhesive G is approximately the same height as the coil, but does not cover the top surface of the coil 32. This ensures that the wireless charging module 30 has a better magnetic field strength in the Z-axis direction (vertical direction), thereby enabling the coil of the wireless charging receiver to generate a higher induced voltage, thus significantly improving the charging power and efficiency of the wireless charging module 30.

[0039] Next, please refer to Figures 8, 9, 10, and 11 together. Figure 8 shows a perspective view of a wireless charging module 40 according to another embodiment of the present invention. Figure 9 shows an exploded view of the wireless charging module 40 in Figure 8. Figure 10 shows a cross-sectional view along line segment A3-A4 in Figure 8. Figure 11 shows another cross-sectional view along line segment A3-A4 in Figure 8.

[0040] As shown in Figures 8, 9, 10, and 11, a wireless charging module 40 according to another embodiment of the present invention includes a magnetic core 41 and at least one coil 42, wherein the magnetic core 41 forms a retaining wall portion 411, an annular groove 412, an opening 413, a protrusion 414, and a through hole 415. Specifically, the protrusion 414 is annular and surrounds the through hole 415 in the center of the magnetic core 41, the opening 413 is formed on the retaining wall portion 411, and the groove 412 is formed between the retaining wall portion 411 and the protrusion 414.

[0041] In actual assembly, the coil 42 can be placed in the groove 412 of the magnetic core 41, and magnetic adhesive can be applied to the bottom surface 4121 of the groove 412 (Figure 11). The magnetic adhesive can also extend from the bottom surface 4121 to the side surface 4122 of the groove 412 (Figure 11) without covering the top surface of the coil 42. This ensures that the wireless charging module 40 has a better magnetic field strength in the Z-axis direction (vertical direction), so that the coil of the wireless charging receiver can generate a higher induced voltage, thereby greatly improving the charging power and efficiency of the wireless charging module 40.

[0042] Please also refer to Figures 12, 13, 14, 15, and 16, wherein Figure 12 shows a perspective view of a wireless charging module 50 according to another embodiment of the present invention, Figure 13 shows an exploded view of the wireless charging module 50 in Figure 12, Figure 14 shows a cross-sectional view along line segment A5-A6 in Figure 12, Figure 15 shows another cross-sectional view along line segment A5-A6 in Figure 12, and Figure 16 shows a schematic diagram of magnetic adhesive G being coated on the surface S of the magnetic core 51.

[0043] As shown in Figures 12, 13, 14, 15, and 16, another embodiment of the wireless charging module 50 of the present invention includes a flat magnetic core 51 and at least one coil 52, wherein the magnetic core 51 has 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, wherein a magnetic adhesive G is further provided on the surface S of the magnetic core 51 for bonding the magnetic core 51 and the coil 52.

[0044] It should be 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 has a better magnetic field strength in the Z-axis direction (vertical direction), so that the coil of the wireless charging receiver can generate a higher induced voltage, thereby greatly improving the charging power and efficiency of the wireless charging module 50.

[0045] Figure 17 shows a cross-sectional view of a wireless charging module 60 according to another embodiment of the present invention, Figure 18 shows a schematic diagram of the magnetic tape T in Figure 17 being bonded to the outer surface of the coil 62, and Figure 19 shows a partial enlarged cross-sectional view of a plurality of bent segments T1 of the magnetic tape T and a plurality of bent portions 621 of the coil 62 being arranged alternately along the X-axis.

[0046] As shown in Figure 17, the wireless charging module 60 in this embodiment includes a flat magnetic core 61, a coil 62, and a magnetic tape T. The coil 62 is connected to an external power source (not shown), and a protrusion 614 is formed in the center of the magnetic core 61. 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.

[0047] As can be seen from Figure 18, during the assembly of the wireless charging module 60, the aforementioned magnetic tape T can first be adhered to the outer surface of the coil 62; then, the magnetic tape T and the coil 62 can be wrapped together around the protrusion 614 and the central axis Z6 (as shown in Figures 17 and 19). For example, the aforementioned magnetic tape T can be a single-sided or double-sided tape containing a highly magnetically permeable material.

[0048] Through the structural design shown in Figures 17 and 19, the plurality of bent segments T1 of the aforementioned magnetic tape T and the plurality of bent portions 621 of the aforementioned coil 62 will be staggered in the horizontal direction (X-axis direction) after assembly. By making the bent segments T1 of the aforementioned magnetic tape T contact and sandwich between adjacent bent portions 621 of the coil 62, the magnetic field strength of the wireless charging module 60 can be increased, thereby greatly improving the charging power and efficiency of the wireless charging module 60.

[0049] Furthermore, a ring-shaped magnetic element T' (e.g., another magnetic tape) is disposed on the surface S of the magnetic core 61 and 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 positioned between the magnetic tape T and the aforementioned magnetic element T' in the horizontal direction (X-axis direction), which can significantly improve the magnetic field uniformity of the wireless charging module 60 and improve the charging efficiency of the wireless charging module 60.

[0050] Figure 20 shows a partial enlarged cross-sectional view of the magnetic adhesive G applied to the surface S of the magnetic core 61 and firmly bonding the magnetic core 61, coil 62 and magnetic tape T.

[0051] As shown in Figure 20, in another embodiment of the present invention, magnetic adhesive G can also be coated on the surface S of the magnetic core 61, thereby further enhancing the magnetic field strength of the wireless charging module 60.

[0052] It should be understood that by applying at least a portion of the magnetic adhesive G between adjacent bends 621 of the coil 62, 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.

[0053] Figure 21 shows a cross-sectional view of a wireless charging module 70 according to another embodiment of the present invention. Figure 22 shows a cross-sectional view of the magnetic tape T in Figure 21 being adhered to the inner surface of the coil 72. Figure 23 shows a partial enlarged cross-sectional view of a plurality of bent segments T1 of the magnetic tape T and a plurality of bent portions 721 of the coil 72 being arranged alternately along the X-axis.

[0054] As shown in Figure 21, the wireless charging module 70 of this 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 forms a retaining wall portion 711, an annular groove 712, and a protrusion 714 located in the center of the magnetic core 71. Specifically, the groove 712 is formed between the retaining wall portion 711 and the protrusion 714. In actual assembly, the coil 72 and the magnetic tape T can be placed on the bottom surface of the groove 712 of the magnetic core 71 and arranged around the central axis Z7 of the magnetic core 71, which is parallel to the Z-axis direction.

[0055] As can be seen from Figure 22, during the assembly of the wireless charging module 70, the aforementioned magnetic tape T can first be adhered to the inner surface of the coil 72; then, the magnetic tape T and the coil 72 can be wrapped together around the protrusion 714 and the central axis Z7 (as shown in Figures 21 and 23). For example, the aforementioned magnetic tape T can be a single-sided or double-sided tape containing a highly magnetically permeable material.

[0056] Through the structural design shown in Figures 21 and 23, the plurality of bent segments T1 of the aforementioned magnetic tape T and the plurality of bent portions 721 of the aforementioned coil 72 will be staggered in the horizontal direction (X-axis direction) after assembly. By making the bent segments T1 of the aforementioned magnetic tape T contact and sandwich between adjacent bent portions 721 of the coil 72, the magnetic field strength of the wireless charging module 70 can be increased, thereby greatly improving the charging power and efficiency of the wireless charging module 70.

[0057] It should be noted that the outermost curved portion 721 of the coil 72 will be located between the magnetic tape T and the retaining portion 711 of the magnetic core 71 after assembly, thereby increasing the magnetic flux density and magnetic field uniformity around the wireless charging module 70, thereby greatly improving the performance of the wireless charging module 70.

[0058] Figure 24 shows a partial enlarged cross-sectional view of the magnetic adhesive G applied to the bottom surface of the groove 712 of the magnetic core 71 and firmly bonding the magnetic core 71, coil 72 and magnetic tape T.

[0059] As shown in Figure 24, in another embodiment of the present invention, magnetic adhesive G can also be applied to the bottom surface of the groove 712 of the magnetic core 71, thereby further enhancing the magnetic field strength of the wireless charging module 70.

[0060] It should be understood that by applying at least a portion of the magnetic adhesive G between adjacent bends 721 of the coil 72, the magnetic core 71, the coil 72 and the magnetic tape T can be firmly bonded to each other to prevent the coil 72 and the magnetic tape T from falling off the magnetic core 71.

[0061] In summary, the present invention provides a wireless charging module, wherein a magnetic element containing a magnetically conductive material (e.g., magnetic adhesive and / or magnetic tape) is provided on the surface of the magnetic core of the wireless charging module. In one embodiment, magnetic adhesive can be filled in the gap between the coil and the magnetic core; in addition, magnetic tape can be adhered to the inner or outer surface of the coil and arranged around the central axis of the core during assembly, thereby significantly improving the charging efficiency of the wireless charging module.

[0062] By attaching the aforementioned magnetic elements (such as magnetic adhesive and / or magnetic tape) to the coil, the present invention can effectively enhance the charging magnetic field strength of the wireless charging module, enabling the coil of the wireless charging receiver to generate a higher induced voltage, thereby significantly improving the charging power and efficiency of the wireless charging module. For example, the aforementioned magnetic adhesive may contain ferrite, alloy, amorphous, nanocrystalline, or other magnetic adhesives or powders with high magnetic permeability, and the aforementioned magnetic tape T may be a single-sided or double-sided tape containing a highly magnetic material.

[0063] It should be understood that the wireless charging module disclosed in the foregoing embodiments can also be electrically connected to a battery to serve as a wireless charging receiver, and the charging power and efficiency of the wireless charging module can be improved through the aforementioned magnetic adhesive and / or magnetic tape, and is not limited to those disclosed in the embodiments of the present invention.

[0064] Although the embodiments and advantages of the present invention have been disclosed above, it should be understood that anyone skilled in the art can make modifications, substitutions, and refinements without departing from the spirit and scope of the present invention. Furthermore, the scope of protection of the present invention is not limited to the processes, machines, manufacturing, material composition, apparatus, methods, and steps described in the specific embodiments of the specification. Anyone skilled in the art can understand from the disclosure of the present invention that current or future developed processes, machines, manufacturing, material composition, apparatus, methods, and steps can be used according to the present invention as long as they can perform substantially the same function or obtain substantially the same results in the embodiments described herein. Therefore, the scope of protection of the present invention includes the aforementioned processes, machines, manufacturing, material composition, apparatus, methods, and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of the present invention also includes combinations of various claim claims and embodiments.

[0065] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims. [Simplified Explanation of the Diagram]

[0023] Figure 1 shows a cross-sectional view of a commonly used wireless charging device in its usage state. Figure 2 shows a perspective view of a wireless charging module 30 according to an embodiment of the present invention. Figure 3 shows an exploded view of the wireless charging module 30 in Figure 2. Figure 4 shows a cross-sectional view along line segment A1-A2 in Figure 2. Figure 5 shows another cross-sectional view along line segment A1-A2 in Figure 2. Figure 6 shows a schematic diagram of magnetic adhesive G being coated on the surface of the groove 312 of the magnetic core 31. Figure 7 shows a schematic diagram of magnetic adhesive G covering the bottom surface 3121 and side surface 3122 of the groove 312. Figure 8 shows a perspective view of a wireless charging module 40 according to another embodiment of the present invention. Figure 9 shows an exploded view of the wireless charging module 40 in Figure 8. Figure 10 shows a cross-sectional view along line segment A3-A4 in Figure 8. Figure 11 shows another cross-sectional view along line segment A3-A4 in Figure 8. Figure 12 shows a perspective view of a wireless charging module 50 according to another embodiment of the present invention. Figure 13 shows an exploded view of the wireless charging module 50 in Figure 12. Figure 14 shows a cross-sectional view along line segment A5-A6 in Figure 12. Figure 15 shows another cross-sectional view along line segment A5-A6 in Figure 12. Figure 16 shows a schematic diagram of magnetic adhesive G applied to the surface S of the magnetic core 51. Figure 17 shows a cross-sectional view of a wireless charging module 60 according to another embodiment of the present invention. Figure 18 shows a schematic diagram of the magnetic tape T in Figure 17 bonded to the outer surface of the coil 62. Figure 19 shows a partial enlarged cross-sectional view of a plurality of bent segments T1 of the magnetic tape T and a plurality of bent portions 621 of the coil 62 arranged alternately along the X-axis. Figure 20 shows a partial enlarged cross-sectional view of the magnetic adhesive G applied to the surface S of the magnetic core 61 and firmly bonding the magnetic core 61, the coil 62 and the magnetic tape T. Figure 21 shows a cross-sectional view of a wireless charging module 70 according to another embodiment of the present invention. Figure 22 shows a cross-sectional view of the magnetic tape T in Figure 21 bonded to the inner surface of the coil 72. Figure 23 shows a partial enlarged cross-sectional view of a plurality of bent segments T1 of the magnetic tape T and a plurality of bent portions 721 of the coil 72 arranged alternately along the X-axis. Figure 24 shows a partial enlarged cross-sectional view of magnetic adhesive G applied to 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.

Claims

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

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

3. The wireless charging module of claim 1, wherein the magnetic tape is adhered to one 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 adhered to one of the outer surfaces 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 adhered to one inner surface of the coil and surrounds the central axis of the magnetic core.

6. The wireless charging module of claim 1, wherein the plurality of bent segments of the magnetic tape and the bent portions of the coil are arranged alternately along the horizontal direction.

7. The wireless charging module of claim 1, wherein the magnetic core has a protrusion, an annular retaining portion and an annular groove, and the groove is formed between the retaining 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 one of the bottom surfaces 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 highly magnetic material.

11. A wireless charging module, comprising: One magnetic core; A magnetic tape is disposed on the magnetic core and surrounds a central axis of the magnetic core; a coil is disposed on the magnetic core and electrically connected to an external power source, wherein a bent section of the magnetic tape is located in a horizontal direction between a plurality of bent portions of the coil, and the horizontal direction is perpendicular to the central axis; at least one gap is formed between the magnetic core and the coil; and a magnetic adhesive is filled in the gap for bonding the magnetic core and the coil.

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