Wireless charging coil

Abstract

The utility model discloses a wireless charging coil, and the coil comprises a magnetic isolation sheet which comprises a magnetic isolation body and a heat dissipation layer, and the heat dissipation layer is integrally disposed at one side of the magnetic isolation body; the coil body is arranged on the side, away from the heat dissipation layer, of the magnetism isolating body, the coil body comprises an excitation wire and a magnetic envelope, the excitation wire is arranged on the magnetism isolating sheet in a surrounding mode, and the magnetic envelope is arranged on the outer side of the excitation wire in an enveloping mode. The heat dissipation layer is integrally arranged on the side, away from the coil body, of the magnetic isolation body, when the coil body is charged, the heat dissipation layer can well dissipate heat, and the heat dissipation effect is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of wireless charging, and in particular to a wireless charging coil. Background Art

[0002] With the advancement of technology, wireless charging coils are constantly developing towards being lighter, thinner and smaller. As the performance of electronic products continues to improve, their operating temperatures also increase, and the heat dissipation requirements for wireless charging coils are also becoming higher and higher.

[0003] In the prior art, a general wireless charging coil is composed of a magnetic isolation sheet and a coil. Since the coil cannot dissipate heat automatically, the wireless charging coil can only rely on natural heat dissipation during the charging process, or add a silicone pad on the back of the magnetic isolation sheet to conduct heat away. This will not only increase the thickness of the wireless charging coil, but also fail to achieve a better heat dissipation effect. Utility Model Content

[0004] In view of this, the present application provides a wireless charging coil, which aims to solve the problem that the wireless charging coil in the prior art cannot automatically dissipate heat during the charging process and cannot achieve a better heat dissipation effect.

[0005] The present application proposes a wireless charging coil, comprising:

[0006] The magnetic isolation sheet comprises a magnetic isolation body and a heat dissipation layer, wherein the heat dissipation layer is integrally arranged on one side of the magnetic isolation body;

[0007] The coil body is arranged on a side of the magnetic isolation body away from the heat dissipation layer. The coil body includes an excitation wire and a magnetic envelope. The excitation wire is arranged around the magnetic isolation sheet, and the magnetic envelope is arranged outside the excitation wire.

[0008] Optionally, the heat dissipation layer includes a resin dispersion, a curing agent, a ceramic infrared radiation material powder and a thermal conductive auxiliary material powder, and the curing agent, the ceramic infrared radiation material powder and the thermal conductive auxiliary material powder are all distributed in the resin dispersion.

[0009] Optionally, a first through hole is arranged at the center of the magnetic isolation plate, and the excitation wire is arranged around the first through hole.

[0010] Optionally, the thickness of the wireless charging coil is in the range of 0.08-0.11 mm.

[0011] Optionally, the magnetic envelope wire includes a second resin, selenium oxide, graphene, and metal powder;

[0012] The selenium oxide, the graphene, and the metal powder are all distributed in the second resin.

[0013] Optionally, the metal powder includes silver powder, copper powder and stainless steel powder;

[0014] The silver powder, the copper powder and the stainless steel powder are all distributed in the second resin;

[0015] Wherein, the particle size of the silver powder is less than 50 mil.

[0016] Optionally, the second resin includes any one or more of acrylic, polyurethane, phenolic, and epoxy.

[0017] Optionally, the proportion of the second resin is 20%-50%.

[0018] Optionally, the magnetic isolation body comprises metal oxide, iron-based amorphous alloy powder and a curing agent;

[0019] The metal oxide and the iron-based amorphous alloy powder are distributed in the curing agent.

[0020] Optionally, the metal oxide includes iron oxide, cobalt oxide and nickel oxide;

[0021] The iron oxide, the cobalt oxide, the nickel oxide, and the iron-based amorphous alloy powder are all distributed in the curing agent.

[0022] The beneficial effects of the present application are as follows: different from the prior art, the present application arranges a magnetic isolation sheet, which can effectively reduce the loss; secondly, the present application arranges a magnetic isolation sheet including a magnetic isolation body and a heat dissipation layer, and the heat dissipation layer is integrally arranged on the side of the magnetic isolation body away from the coil body. When the coil body is charged, the heat dissipation layer can dissipate heat well and enhance the heat dissipation effect; in addition, the present application arranges the coil body on the side of the magnetic isolation body away from the heat dissipation layer, arranges the coil body including an excitation wire and a magnetic envelope, surrounds the excitation wire on the magnetic isolation sheet, and arranges the magnetic envelope envelope on the outside of the excitation wire. The excitation wire gives the magnetic envelope a certain supporting force, and the magnetic envelope envelope is arranged on the outside of the excitation wire to form inductors with different resistance values.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1It is a structural schematic diagram of a cross section of the wireless charging coil of the present application;

[0026] Figure 2 It is a structural schematic diagram of an embodiment of the wireless charging coil of the present application;

[0027] Figure 3 It is a structural schematic diagram of a circular embodiment of the coil body in the wireless charging coil of the present application;

[0028] Figure 4 It is a structural schematic diagram of a square embodiment of the coil body in the wireless charging coil of the present application.

[0029] Among them, the reference numerals in the figures are: 10, magnetic isolation sheet; 11, magnetic isolation body; 12, heat dissipation layer; 13, first through hole; 20, coil body. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present application, the wireless charging coil provided in the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It can be understood that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0032] The present application provides a wireless charging coil, aiming to solve the problem that the wireless charging coil in the prior art cannot automatically dissipate heat during charging and cannot achieve a better heat dissipation effect.

[0033] In one embodiment, if Figure 1 As shown, the present application proposes a wireless charging coil, which may include a magnetic isolation sheet 10 and a coil body 20. The magnetic isolation sheet 10 may include a magnetic isolation body 11 and a heat dissipation layer 12, the heat dissipation layer 12 may be integrally arranged on one side of the magnetic isolation body 11, the coil body 20 may be arranged on a side of the magnetic isolation body 11 away from the heat dissipation layer 12, the coil body 20 may include an excitation wire and a magnetic envelope, the excitation wire may be arranged around the magnetic isolation sheet 10, and the magnetic envelope may be arranged to wrap around the outside of the excitation wire.

[0034] In the embodiments of the present application, the present application sets a magnetic isolation sheet 10, and the magnetic isolation sheet 10 can effectively reduce the loss; secondly, the present application sets a magnetic isolation sheet 10 including a magnetic isolation body 11 and a heat dissipation layer 12, and the heat dissipation layer 12 is integrally arranged on the side of the magnetic isolation body 11 away from the coil body 20. When the coil body 20 is charged, the heat dissipation layer 12 can dissipate heat well and enhance the heat dissipation effect; in addition, the present application sets the coil body 20 on the side of the magnetic isolation body 11 away from the heat dissipation layer 12, and sets the coil body 20 including an excitation wire and a magnetic envelope, and the excitation wire is wrapped around the magnetic isolation sheet 10, and the magnetic envelope is set on the outside of the excitation wire. The excitation wire gives the magnetic envelope a certain supporting force, and the magnetic envelope is set on the outside of the excitation wire to form inductors with different resistance values.

[0035] In some embodiments, the heat dissipation layer 12 may include a resin dispersion, a curing agent, a ceramic infrared radiation material powder, and a thermal conductive auxiliary material powder, wherein the curing agent, the ceramic infrared radiation material powder, and the thermal conductive auxiliary material powder are all distributed in the resin dispersion.

[0036] Optionally, the ceramic infrared radiation material powder can be set as nano-lapis lazuli composite particles. The lapis lazuli composite has a good infrared radiation effect. At the same time, the nano-lapis lazuli and the thermal conductive auxiliary material are distributed in the resin dispersion to form a heat dissipation layer 12. Since the radiation frequency of nano-lapis lazuli is relatively wide, it can achieve a good heat dissipation effect.

[0037] Optionally, the heat dissipation layer 12 is a water-based ink material, and its specific ingredients are water-based acrylic polyurethane resin, silicone resin, lapis lazuli synthetic nanopowder, isopropyl alcohol and residual water, wherein the water-based acrylic polyurethane resin and silicone resin are mediums, nano lapis lazuli is artificial lapis lazuli, which is a synthetic material, and the thermal conductive auxiliary materials include silicon dioxide, silicon carbide, aluminum nitride, boron nitride, any one of which can be used, or any combination of several of them.

[0038] Among them, the working principle of the heat dissipation layer 12: the heat dissipation layer 12 material composed of the above components has a large thermal conductivity and a high infrared emissivity. When the temperature of the heat source is higher, a kind of infrared ray will be generated, and its frequency is higher, which is the same frequency as the infrared emissivity of the heat dissipation layer 12 material, so that the heat transfer effect is better.

[0039] In some embodiments, a first through hole 13 may be provided at the center of the magnetic isolation sheet 10, and the excitation wire may be arranged around the first through hole 13 so that the first through hole 13 passes through the entire wireless charging coil. When the power reaches a certain level, magnetic saturation will prevent the power from increasing. The first through hole 13 is provided to prevent magnetic saturation from being easily reached.

[0040] Among them, after the magnetic isolation body 11 is isolated, the heat dissipation layer 12 thereon has the function of infrared heat dissipation, and there is no need to use a silicone pad for heat conduction, which reduces the thickness of the magnetic isolation sheet 10 and makes the wireless charging coil lighter and thinner.

[0041] In some embodiments, the thickness range of the wireless charging coil can be set to 0.08-0.11 mm, making the wireless charging coil thinner and lighter to adapt to the trend of thin and light electronic products. It is easy to imagine that the thickness range of the wireless charging coil can also be set to 0.08 mm, 0.09 mm, 0.10 mm and 0.11 mm.

[0042] In some embodiments, the magnetic envelope may include a second resin, selenium oxide, graphene, and metal powder, wherein the selenium oxide, graphene, and metal powder may be uniformly distributed in the second resin to form a stable resistivity.

[0043] In some embodiments, the metal powder may include silver powder, copper powder and stainless steel powder, wherein the silver powder, copper powder and stainless steel powder may be uniformly distributed in the second resin, and the particle size of the silver powder may be set to be less than 50 mil.

[0044] In some embodiments, the second resin may include any one or more of acrylic, polyurethane, phenolic, and epoxy, which have the advantage of high temperature resistance.

[0045] In some embodiments, the ratio of the second resin may be set to 20%-50%.

[0046] Optionally, the ratio of selenium oxide, graphene, silver powder, copper powder and stainless steel powder can be set to 50%-80%.

[0047] Optionally, the magnetic envelope is a new type of conductive material mixed from a second resin, selenium oxide, graphene, silver powder, copper powder and stainless steel powder. It is a conductor that can form a circuit, and the mixed new conductive material is very light in weight, and the resistivity can be adjusted by the coil indicators (width, number of turns, wire diameter, etc.), thereby adjusting the internal resistance and adjusting the inductance value. That is, the inductance value is comprehensively affected by controlling the width of the magnetic envelope coil, the new conductive component, the spacing between the coils, and the coupling area, making the magnetic envelope very light and the key parameters controllable.

[0048] Alternatively, if Figure 2 , Figure 3 and Figure 4 As shown, the coil body 20 can be arranged in a circular shape, a square shape, or any other shape as required, and the resistivity can be adjusted according to the width, number of turns, wire diameter, etc. of the coil.

[0049] In some embodiments, the magnetic isolation body 11 may include metal oxide, iron-based amorphous alloy powder and a curing agent, wherein the metal oxide and the iron-based amorphous alloy powder may be uniformly distributed in the curing agent.

[0050] In some embodiments, the metal oxide may include iron oxide, cobalt oxide and nickel oxide, wherein the iron oxide, cobalt oxide, nickel oxide and iron-based amorphous alloy powder may be uniformly distributed in the curing agent.

[0051] In summary, the present application sets a magnetic isolation sheet 10 including a magnetic isolation body 11 and a heat dissipation layer 12, the heat dissipation layer 12 is integrally arranged on one side of the magnetic isolation body 11, the coil body 20 is arranged on the side of the magnetic isolation body 11 away from the heat dissipation layer 12, and the coil body 20 includes an excitation wire and a magnetic envelope, the excitation wire is arranged around the magnetic isolation sheet 10, and the magnetic envelope is arranged on the outside of the excitation wire, and the heat dissipation layer 12 is integrally arranged on the side of the magnetic isolation body 11 away from the coil body 20. When the coil body 20 is charged, the heat dissipation layer 12 can dissipate heat well and enhance the heat dissipation effect. Secondly, by setting the heat dissipation layer 12 to include a resin dispersion, a curing agent, a ceramic infrared radiation material powder and a thermal conductive auxiliary material powder, the curing agent, the ceramic infrared radiation material powder and the thermal conductive auxiliary material powder are all distributed in the resin dispersion, so that the nano lapis lazuli and the thermal conductive auxiliary material are all distributed in the resin dispersion to form a heat dissipation layer 12. Since the radiation frequency of the nano lapis lazuli is relatively wide, a good heat dissipation effect can be achieved. In addition, the thickness of the wireless charging coil can be set to 0.08-0.11 mm, making the wireless charging coil thinner and lighter.

[0052] It should be noted that the various optional implementations introduced in the embodiments of the present application can be implemented in combination with each other or can be implemented separately, and the embodiments of the present application are not limited to this.

[0053] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, it cannot be understood as a limitation on the present application. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] The above embodiments are described with reference to the accompanying drawings, and other different forms and embodiments are also feasible without departing from the principles of the present application, so the present application should not be constructed as a limitation of the embodiments proposed herein. More specifically, these embodiments are provided so that the present application will be perfect and complete, and the scope of the present application will be conveyed to those skilled in the art. In the accompanying drawings, the component sizes and relative sizes may be exaggerated for clarity. The terms used herein are only based on the purpose of describing specific embodiments and are not intended to be limiting. The terms "comprising" and / or "including" when used in this specification indicate the presence of the features, integers, components and / or components, but do not exclude the presence or increase of one or more other feature integers, components, components and / or their groups. Unless otherwise indicated, when stated, the numerical range includes the upper and lower limits of the range and any sub-ranges therebetween.

[0056] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A wireless charging coil, characterized in that: include: The magnetic isolation sheet comprises a magnetic isolation body and a heat dissipation layer, wherein the heat dissipation layer is integrally arranged on one side of the magnetic isolation body; The coil body is arranged on a side of the magnetic isolation body away from the heat dissipation layer. The coil body includes an excitation wire and a magnetic envelope. The excitation wire is arranged around the magnetic isolation sheet, and the magnetic envelope is arranged outside the excitation wire.

2. The wireless charging coil according to claim 1, characterized in that: A first through hole is arranged at the center of the magnetic isolation plate, and the excitation wire is arranged around the first through hole.

3. The wireless charging coil according to claim 1, characterized in that: The thickness of the wireless charging coil is in the range of 0.08-0.11 mm.

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