Coil structure capable of improving wireless charging efficiency

Abstract

The utility model belongs to the technical field of wireless charging, in particular to a coil structure capable of improving wireless charging efficiency, which comprises a coil, a bakelite plate and a magnetic isolation sheet, and is characterized in that the coil is arranged on one side surface of the bakelite plate in a surrounding manner, and the bakelite plate is made of an insulating material; the magnetic isolation sheet is arranged on the side face, away from the coil, of the bakelite plate and used for reflecting a magnetic field generated by the coil. The wireless charging device has the effects of enhancing the magnetic field intensity above the coil and improving the wireless charging efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wireless charging, specifically a coil structure with improved wireless charging efficiency. BACKGROUND

[0002] Wireless charging technology includes electromagnetic induction and electromagnetic resonance, and the electromagnetic resonance technology is realized through two resonance systems of transmission and reception. The coils of the transmission end and the receiving end are respectively made of an induction coil, the transmission end vibrates at a certain frequency by adjusting the transmission frequency, and the generated is not ordinary electromagnetic waves diffused everywhere, but a non-radiation magnetic field. The non-radiation magnetic field forms an energy channel between the two coils, and the inherent frequency of the receiving end is the same as the frequency of the transmission end, so that resonance occurs. Each resonance produces a voltage in the inductor, and after multiple resonances, the inductor surface accumulates enough energy, completes the conversion from magnetic energy to electric energy, and finally realizes wireless charging.

[0003] However, wireless charging products are mostly coil and plastic bottom shell assemblies, which have the problems of slow charging, large heat generation leading to low efficiency, poor compatibility and the like.

[0004] Therefore, the prior art needs to be improved. UTILITY MODEL CONTENTS

[0005] In order to make up for the problems of the prior art, the present application provides a coil structure with improved wireless charging efficiency.

[0006] The utility model solves its technical problem and adopts the following technical scheme:

[0007] A coil structure with improved wireless charging efficiency, comprising a coil, a bakelite plate and a magnetic separation sheet, the coil is arranged around one side of the bakelite plate, the bakelite plate is made of insulating material; the magnetic separation sheet is arranged on the side of the bakelite plate away from the coil, and the magnetic separation sheet is used to reflect the magnetic field generated by the coil.

[0008] Preferably, the side of the bakelite plate is provided with a threading groove, the length direction of the threading groove extends from outside to inside, and the threading groove is arranged to pass through the bakelite plate, and the input end of the coil is arranged to pass into the threading groove.

[0009] Preferably, the coil is wrapped with a silica gel insulating and heat conducting film.

[0010] Preferably, the coil comprises a plurality of copper wires, and adjacent two copper wires are arranged to be insulated from each other.

[0011] Preferably, the thickness of the bakelite plate is 3mm.

[0012] Preferably, the magnetic separation sheet is provided with three layers.

[0013] In summary, the application sets the magnetic isolation sheet and the coil on the upper and lower sides of the bakelite plate, so that the coil generates a 360° magnetic field when energized, and the downward magnetic field is reflected by the magnetic isolation sheet to strengthen the strength of the magnetic field above the coil, thereby improving the charging efficiency of the electronic device during wireless charging. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 is a top view of the coil structure in the embodiment of the present application;

[0016] Figure 2 is a perspective view of the coil structure in the embodiment of the present application.

[0017] Explanation of reference signs: 1, coil; 2, bakelite plate; 21, threading groove; 3, magnetic isolation sheet. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] The embodiment of the present application discloses a coil structure with improved wireless charging efficiency. Referring to Figure 1 and Figure 2The coil 1 structure comprises the coil 1, the bakelite plate 2 and the magnetic separation sheet 3. Specifically, the coil 1 is arranged around by itself, and the overall wire diameter of the coil 1 is 2.8mm-3.5mm. The coil 1 is internally provided with 100-1000 full copper wires, the wire diameter of a single copper wire is between 0.01mm-1mm, and the twisted wire of the multiple copper wires is twisted into a twisted shape in a positive and negative cross manner to ensure that the length is uniform and the tightness is good. In this embodiment, the coil 1 is formed by 350 full copper wires with a wire diameter of 0.1mm. The bakelite plate 2 is in the form of a thin plate and can be in the form of a rectangle or other forms. The overall coil 1 is arranged on the upper side of the bakelite plate 2. The bakelite plate 2 is made of an insulating hard material to make the bakelite plate 2 have an insulating effect and can be used as a bearing base for the coil 1. The magnetic separation sheet 3 is made of a ferrite mixed magnetic separation material and has a thickness of 0.5mm-1mm. The magnetic separation sheet 3 is arranged on the side of the bakelite plate 2 away from the coil 1, i.e. the magnetic separation sheet 3 is arranged on the lower side of the bakelite plate 2. The magnetic separation sheet 3 is also in the form of a thin plate and can be in various shapes. In this embodiment, the magnetic separation sheet 3 is consistent with the shape and size of the bakelite plate 2. The magnetic separation sheet 3 is made of a strong magnetic reflection material and can be used to reflect a magnetic field. Therefore, after the coil 1 is powered, the coil 1 will generate a magnetic field that spreads in all directions. Due to the arrangement of the magnetic separation sheet 3, the magnetic separation sheet 3 can reflect the downward magnetic field generated by the coil 1 upward to make the upward magnetic field superimpose on each other to increase the magnetic field strength above the coil 1. At the same time, the arrangement of the bakelite plate 2 can have an insulating effect. Therefore, when the electronic device is wirelessly charged, the charging efficiency of the device can be improved.

[0020] In this embodiment, the thickness of the bakelite plate 2 is 3mm. The bakelite plate 2 with this thickness has good insulating properties and does not affect the magnetic field reflection effect of the magnetic separation sheet 3. At the same time, the magnetic separation sheet 3 is arranged in the form of a single layer or a multi-layer stack, i.e. 1-10 layers. The two sides of the single-layer magnetic separation sheet 3 are pasted with adhesive paper with a thickness of 0.01mm-0.05mm, which is corrosion-resistant and high-temperature-resistant. Preferably, the magnetic separation sheet 3 is 3 layers. At this time, the reflection effect of the magnetic separation sheet 3 is best, and the charging efficiency is improved.

[0021] In addition, in order to increase the insulating effect of the coil 1, a layer of silica gel insulating heat-conducting film is wrapped outside the coil 1. The silica gel insulating heat-conducting film comprises two layers. The first layer is made of a corrosion-resistant soft material and has a thickness of 0.8mm-1mm, which is high-temperature-resistant and high-pressure-resistant. The second layer is made of a flame-retardant material and has a thickness of 0.01mm-0.05mm, which is corrosion-resistant. At the same time, the multiple copper wires inside the coil 1 are also insulated by single enameled wire, which has a thickness of 0.01mm-0.02mm. Therefore, the insulating effect can be better during use, and the enameled wire has the advantages of high-pressure resistance, moisture resistance, humidity resistance, corrosion resistance and safety performance improvement during wireless charging.

[0022] In order to facilitate the installation of subsequent parts, a threading groove 21 is formed at the edge of the bakelite plate 2, the threading groove 21 is long strip-shaped from the slot direction, in the embodiment, the threading groove 21 extends from the center of the bakelite plate 2 to the edge, and the opening of the threading groove 21 is arranged close to the edge of the bakelite plate 2, so as to facilitate the insertion of the input end of the coil 1, so that the input end of the coil 1 can be hidden in the bakelite plate 2, so that the entire coil 1 is in a flat state, facilitating subsequent structure threading.

[0023] The above are preferred embodiments of the present application, not limited by the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A coil structure with improved wireless charging efficiency, characterized by: The coil, bakelite and magnetic isolation sheet are included, the coil is arranged on one side of the bakelite, the bakelite is made of insulating material, the magnetic isolation sheet is arranged on the side of the bakelite far from the coil, and the magnetic isolation sheet is used for reflecting the magnetic field generated by the coil.

2. The coil structure for improving the efficiency of wireless charging according to claim 1, wherein: The wire slot is arranged on the side of the bakelite, the wire slot extends from outside to inside in the length direction, and the wire slot penetrates the bakelite, and the input end of the coil is used for penetrating the wire slot.

3. The coil structure for improving the efficiency of wireless charging of claim 1, wherein: The coil is wrapped with silica gel insulation and heat conduction film.

4. The coil structure for improving the efficiency of wireless charging of claim 3, wherein: The coil includes multiple copper wires, and adjacent two copper wires are arranged in insulation.

5. The coil structure for improving the efficiency of wireless charging of claim 1, wherein: The thickness of the bakelite is 3mm.

6. The coil structure for improving wireless charging efficiency of claim 1, wherein: The magnetic isolation sheet is provided with three layers.

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