Simple heat dissipation type wireless charging structure

Abstract

This application relates to the field of wireless charging structure technology, and in particular to a simple heat-dissipating wireless charging structure, comprising: a transmitting coil; a housing with an internal cavity; the transmitting coil being disposed in the cavity, the cavity being filled with a phase change thermally conductive material; and an infrared radiation heat dissipation coating being disposed on the exterior of the housing. The solution of this application has a simple structure, a compact design, and advantages such as efficient heat absorption and dissipation, and effective handling of transient thermal shock, enabling efficient thermal energy management within a limited space.

Description

Technical Field

[0001] This application relates to the field of wireless charging structure technology, and in particular to a simple heat dissipation wireless charging structure. Background Technology

[0002] Wireless charging technology, also known as contactless power transfer technology, has been widely used in consumer electronics, electric vehicles, and medical devices in recent years. Its basic principle is to achieve wireless power transfer through electromagnetic induction, magnetic resonance, or radio frequency, thereby eliminating the physical connection limitations of traditional wired charging and improving the user experience. However, with the popularization of wireless charging technology, the overheating problem of wireless charging devices has become a key factor restricting charging efficiency and product lifespan.

[0003] To address the overheating issue of wireless charging devices, existing wireless charging structures typically employ either a dedicated cooling chip and fan cooling system or a more complex liquid cooling system.

[0004] For example, patent document CN222721842U discloses a wireless charging device with active heat dissipation function, including a housing, circuit board, wireless charging module, cooling chip, cooling plate, fan, and heat sink. The wireless charging module, cooling chip, and fan are connected to the circuit board. The cooling chip is connected to the wireless charging module. The top surface of the cooling plate is in contact with the bottom surface of the coil of the wireless charging module, and the bottom surface of the cooling plate is in contact with the top surface of the cooling chip. An insulating isolation plate is provided on the bottom surface of the circuit board to separate the circuit board from the heat sink. The advantage is that the cooling plate can exchange the heat of the coil and the cold energy of the cooling chip in a timely manner, thereby achieving a better cooling effect for the wireless charging module and preventing significant condensation on the cooling chip. The insulating isolation plate between the circuit board and the heat sink can separate the heat of the heat sink from the circuit board, thereby protecting the electronic components and improving heat dissipation efficiency. However, the disadvantage is that the addition of the fan and heat sink increases the complexity of the structure, which in turn increases the assembly complexity and manufacturing cost.

[0005] For example, patent document CN220493410U discloses a multifunctional wireless charging and heat dissipation device for mobile phones, including a multifunctional panel and a cooling component. The multifunctional panel has a built-in wireless charging coil module, and the side of the multifunctional panel that is in contact with the mobile phone has a built-in cooling channel. The cooling component includes a cooling box, and the cooling box and the cooling channel are connected by a water pump module and a circulation pipeline. A semiconductor refrigeration module is installed on the circulation pipeline that supplies coolant to the cooling channel to cool the coolant. The advantages are that it can efficiently dissipate heat and charge the charging structure and the mobile phone being charged; the coolant in the cooling box circulates in the cooling channel, quickly absorbing the heat generated by the mobile phone, and the semiconductor refrigeration module generates a low temperature to reduce the temperature of the coolant, improving the heat dissipation efficiency of the coolant for the mobile phone; when the mobile phone battery is low, it can be wirelessly charged through the wireless charging coil module, and the heat generated during the charging process can also be dissipated through the coolant, which helps to improve charging efficiency. However, the disadvantage is that the cooling component is bulky and complex in design.

[0006] While both of the aforementioned solutions offer good heat dissipation performance, their complex structures prevent efficient thermal management within limited spaces. Therefore, achieving efficient thermal management within confined spaces while ensuring stable equipment operation remains a pressing technical challenge in this field. Utility Model Content

[0007] The purpose of this application is to propose a simple heat dissipation wireless charging structure, which solves the problems of the complex structure of existing wireless charging structures and the inability to achieve efficient thermal energy management in a limited space.

[0008] To achieve the above objectives, this application adopts the following technical solution: A simple heat-dissipating wireless charging structure includes: a transmitting coil; a housing with an internal cavity; the transmitting coil is disposed in the cavity, the cavity is filled with a phase change thermally conductive material, and the exterior of the housing is provided with an infrared radiation heat dissipation coating.

[0009] Based on the above solution and as a preferred embodiment of the above solution: the box body includes a bottom box and a lid, the bottom box has a cavity structure with an open top, the lid is disposed on the bottom box, and the lid covers the opening of the bottom box to form the receiving cavity.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: a plane is provided on one side of the box body, and the transmitting coil is arranged directly opposite the plane.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: a magnetic ring is provided near the plane.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the magnetic ring is arranged around the transmitting coil in the receiving cavity.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme: one side of the transmitting coil is provided with a magnetic shielding sheet.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: a magnetic shielding sheet is provided on one side of the transmitting coil, and the magnetic shielding sheet is provided on the side of the transmitting coil away from the box cover.

[0015] Based on the above scheme and as a preferred embodiment of the above scheme: the box body is provided with a wire outlet hole, which is used to lead out the connecting wire of the transmitting coil.

[0016] Based on the above scheme and as a preferred embodiment of the above scheme: the phase change thermal conductive material is phase change wax.

[0017] Based on the above scheme and as a preferred embodiment of the above scheme: the transmitting coil is located in the middle of the box.

[0018] To address the issues of complex structures and inability to achieve efficient thermal management within limited spaces in existing wireless charging technologies, this application offers the following advantages: The simplified heat dissipation wireless charging structure of this application dissipates the heat generated by the wireless charging component during operation by completely immersing and covering the wireless charging component in a phase change thermally conductive material.

[0019] Among them, phase change thermal conductive materials have a large heat capacity and a high thermal conductivity coefficient, which can quickly absorb and conduct the heat generated by the wireless charging component. At the same time, they can absorb a large amount of heat with a small temperature change, thus achieving thermal buffering. This can effectively handle transient thermal shocks and overcome the problem of sudden temperature rise in fast charging mode.

[0020] The phase change thermal conductive material absorbs heat and conducts it to the box body for heat dissipation and release. Combined with the infrared radiation heat dissipation coating (emissivity ≥ 0.9) on the outside of the box body, efficient heat dissipation is achieved.

[0021] It is worth noting that this solution has a simple structure, a small design size, and advantages such as efficient heat absorption and dissipation, and effective handling of transient thermal shock, enabling efficient thermal energy management within a limited space.

[0022] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. These will be further described in detail below with reference to figures. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the simplified heat-dissipating wireless charging structure of this application; Figure 2 This is a schematic diagram of a simplified heat-dissipating wireless charging structure with the lid not closed, as described in this application. Figure 3 This is an exploded view of the simplified heat-dissipating wireless charging structure of this application. Figure 4 A schematic diagram showing the infrared radiation heat dissipation coating of this application; Figure 5 This is an exploded view of the box assembly of this application.

[0025] Explanation of reference numerals in the attached figures: 100. Wireless charging component; 101. Transmitting coil; 102. Connecting wire; 103. Magnetic ring; 104. Magnetic shielding sheet; 200. Box body; 201. Box cover; 202. Cable outlet hole; 203. Base box; 204. Receiving cavity; 205. Flat surface; 206. Step groove; 300. Infrared radiation heat dissipation coating; 400. Phase change thermal conductive material. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0028] In existing wireless charging technologies, to achieve good heat dissipation, dedicated cooling pads and fan cooling structures or more complex liquid cooling structures are used. While these achieve good heat dissipation, the structures are complex and cannot achieve efficient thermal management within a limited space. This results in bulky wireless charging products, noise during operation, increased assembly complexity, and higher manufacturing costs.

[0029] See Figure 1-5 This application discloses a simple heat dissipation wireless charging structure.

[0030] In the embodiments of this disclosure, such as Figure 2 and Figure 3 The simple heat-dissipating wireless charging structure includes a transmitting coil 101 and a housing 200.

[0031] The transmitting coil 101 serves as the main component of the wireless charging assembly 100, used for wirelessly charging the device being charged. The wireless charging assembly 100 primarily converts electrical energy into electromagnetic field energy through the core component, the transmitting coil 101, driven by a control circuit. This energy, in conjunction with the receiving coil of the device being charged, wirelessly transmits power for charging. The housing 200 contains a receiving cavity 204, within which the transmitting coil 101 is housed. In this simplified heat-dissipating wireless charging structure, the functional module (PCB board) containing the control circuit is typically located independently on a connection line outside the housing 200.

[0032] like Figure 2 As shown, the cavity 204 is filled with a phase change thermally conductive material 400, which immerses and surrounds the wireless charging component 100. Since the phase change thermally conductive material 400 is a novel thermally conductive material with a large heat capacity and high thermal conductivity, it can absorb and conduct heat more quickly. This simple heat-dissipating wireless charging structure dissipates the heat generated by the wireless charging component 100 during operation by completely immersing and covering it in the phase change thermally conductive material 400. This heat conduction method is direct and efficient, allowing the heat generated by the wireless charging component 100 to be promptly transferred to the housing 200 and dissipated through the housing 200. Simultaneously, due to the advantages of the phase change thermally conductive material 400's large heat capacity and high thermal conductivity, it can quickly absorb and conduct the heat generated by the wireless charging component. Furthermore, it can absorb a large amount of heat with minimal temperature change, achieving thermal buffering and effectively handling transient thermal shocks, overcoming the problem of sudden temperature rises during fast charging. Transient thermal shock refers to the process by which an object experiences extreme temperature changes in a short period of time. Effective handling of transient thermal shock requires strong heat conduction and absorption capabilities to prevent rapid temperature rises and falls. The preferred phase change thermal conductive material 400 is phase change wax.

[0033] like Figure 4 As shown, the phase change thermal conductive material 400 absorbs heat and conducts it to the housing 200 for heat dissipation. One or more infrared radiation heat dissipation coatings 300 are provided on the outer surface of the housing 200. The infrared radiation heat dissipation coating 300 is a functional material coating that enhances heat dissipation efficiency by increasing the thermal radiation capability of the object's surface. It has high thermal conductivity and can accelerate the transfer of heat from the object's interior to its surface, where it is then dissipated through radiation, forming a "conduction-radiation" synergistic heat dissipation path. Therefore, the heat generated by the wireless charging component 100 is absorbed by the phase change thermal conductive material 400 and transferred to the housing 200, where it is combined with the infrared radiation heat dissipation coating 300 (emissivity ≥ 0.9) on the outside of the housing 200 to achieve efficient heat dissipation.

[0034] It is worth noting that this simplified heat dissipation wireless charging structure has a simple structure, a small design size, and the advantages of efficient heat absorption, heat dissipation, and effective handling of transient thermal shock, enabling efficient thermal energy management within a limited space.

[0035] In this embodiment, to facilitate the charging of the device and the simplified heat-dissipating wireless charging structure, at least one side of the housing 200 is a plane 205, and the transmitting coil 101 is positioned directly opposite the plane 205. This arrangement allows the device to be positioned directly opposite and close to the plane 205 during charging, ensuring a distance of less than 10mm between the receiving coil and the transmitting coil 101. This facilitates the placement of the device being charged and provides a better interaction distance between the transmitting coil 101 and the receiving coil.

[0036] Furthermore, such as Figure 1 and Figure 4 As shown, the preferred design of the box body 200 is that both the upper and lower ends are flat circles, and one of them is a plane 205. This facilitates the use of the side opposite to the plane 205 for support to place this simple heat dissipation wireless charging structure, and also facilitates the placement of the item to be charged on the plane 205 during use.

[0037] In this embodiment of the disclosure, to facilitate manufacturing, optimize the structure for easy assembly, and reduce production costs, such as... Figure 2 and 3As shown, the box body 200 includes a bottom box 203 and a lid 201. The bottom box 203 has a cavity structure with an open top. The lid 201 is disposed on the bottom box 203, covering the opening of the bottom box 203 to form a receiving cavity 204. During assembly, the wireless charging component 100 is first placed into the cavity structure. For example, the transmitting coil 101 is flatly bonded to the bottom of the bottom box 203 using thermally conductive adhesive. Then, the cavity is filled with phase change thermally conductive material 400. After filling, the lid 201 is installed, ensuring a fixed and sealed fit between the lid 201 and the opening of the bottom box 203.

[0038] Furthermore, the housing 200 is provided with a wire outlet hole 202, which is used to lead out the connecting wire 102 of the transmitting coil 101, and the wire outlet hole 202 is sealed with thermally conductive adhesive. The PCB board device that connects the connecting wire 102 and controls the charging of the transmitting coil 101 is located outside the housing 200, preferably independently located outside the housing 200.

[0039] In some implementations, to further optimize the design structure and reduce the assembly difficulty during manufacturing, such as Figure 5 As shown, a stepped groove 206 is continuously arranged around the inner side of the opening of the bottom box 203. When assembled, the cover 201 can be inserted into the stepped groove 206 at the opening of the bottom box 203, and the cover 201 and the bottom box 203 are fixedly connected as one piece by adhesive.

[0040] Furthermore, such as Figure 2 As shown, a magnetic ring 103 is positioned near the plane 205. When the device being charged is equipped with a magnet or iron block that can be attracted by the magnetic ring 103, the magnetic ring 103 can magnetically fix the device being charged, ensuring a relatively stable wireless connection during charging. The magnetic ring 103 can be positioned within the receiving cavity 204, surrounding the transmitting coil 101, or it can be fixed inside the housing 200 using thermally conductive adhesive. When the device being charged is equipped with a magnet or iron block, the magnetic ring 103 can attract the device, thereby determining the position of the induction coil of the device being charged through magnetic attraction, ensuring charging effectiveness, and simultaneously fixing the position of the device being charged during the charging process.

[0041] In this embodiment, the wireless charging assembly 100 further includes a magnetic shielding sheet 104. The magnetic shielding sheet 104 is disposed on the side of the transmitting coil 101 away from the cover 201. The magnetic shielding sheet 104 blocks and guides the magnetic field, preventing eddy currents in other metal components caused by changing magnetic fields, thereby avoiding heat generation and energy loss. It also prevents damage to electronic products. Furthermore, it confines the magnetic field, ensuring that the magnetic field energy is utilized by the charging device as much as possible.

[0042] When setting specific parameters, such as Figure 2 As shown, the magnetic shielding sheet 104 is attached to the bottom of the receiving cavity 204, the transmitting coil 101 is disposed on the upper side of the magnetic shielding sheet 104, and the magnetic ring 103 is arranged around the periphery of the transmitting coil 101. The wireless charging component 100 is bonded and fixed to the box body 200 with thermally conductive adhesive (epoxy resin thermally conductive adhesive).

[0043] For example, with the cover 201 and the bottom box 203 in place, the lower side of the magnetic shielding sheet 104 is directly bonded to the bottom of the bottom box 203 using thermally conductive adhesive. Then, the lower side of the transmitting coil 101 is bonded to the upper side of the magnetic shielding sheet 104 using thermally conductive adhesive. The transmitting coil 101 is preferably located in the middle of the box, so the transmitting coil 101 is located in the center of the bottom of the bottom box 203. Regarding the fixing of the magnetic ring 103, it can be fixed to the bottom of the bottom box 203 using thermally conductive adhesive, or it can be fixed to the magnetic shielding sheet 104 or the side of the cover 201 near the transmitting coil 101. After ensuring that the connecting wire 102 passes through the outlet hole 202 and the outlet hole 202 is sealed, the bottom box 203 is filled with phase change thermally conductive material 400, and then the cover 201 and the bottom box 203 are closed. The infrared radiation heat dissipation coating 300 can be disposed on the side of the cover 201 away from the transmitting coil 101, or simultaneously disposed on all the outer surfaces of the bottom box 203.

[0044] The cover 201 and the bottom box 203 (i.e., the box body 200) are preferably made of metal with good thermal conductivity. In order to avoid heat dissipation affecting the device being charged, the infrared radiation heat dissipation coating 300 is only applied to all the outer surfaces of the bottom box 203.

[0045] In summary, the simplified heat dissipation wireless charging structure of this application ensures good heat dissipation performance while being simple in structure and can achieve an ultra-thin overall thickness of less than 5mm.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A simple heat dissipation type wireless charging structure, characterized in that, include: Transmitting coil; The box body has an internal cavity designed to accommodate it. The transmitting coil is disposed in the receiving cavity, which is filled with a phase change thermally conductive material, and the outer surface of the box is provided with an infrared radiation heat dissipation coating.

2. The simple heat dissipation wireless charging structure according to claim 1, characterized in that, The box body includes a bottom box and a lid. The bottom box has an open-top cavity structure. The lid is disposed on the bottom box and covers the opening of the bottom box to form the receiving cavity.

3. The simple heat dissipation wireless charging structure according to claim 1, characterized in that, A flat surface is provided on one side of the box body, and the transmitting coil is positioned directly opposite the flat surface.

4. The simple heat dissipation wireless charging structure according to claim 3, characterized in that, A magnetic ring is disposed near the plane.

5. The simple heat dissipation wireless charging structure according to claim 4, characterized in that, The magnetic ring is arranged around the transmitting coil in the receiving cavity.

6. The simple heat dissipation wireless charging structure according to claim 1, wherein, A magnetic shielding sheet is provided on one side of the transmitting coil.

7. The simplified heat dissipation wireless charging structure according to claim 2, characterized in that, A magnetic shielding sheet is provided on one side of the transmitting coil, and the magnetic shielding sheet is located on the side of the transmitting coil away from the cover.

8. The simple heat dissipation wireless charging structure according to claim 1, wherein, The housing is provided with a wire outlet hole, which is used to lead out the connecting wire of the transmitting coil.

9. The simple heat dissipation wireless charging structure according to claim 1, wherein, The phase change thermal conductive material is a phase change wax.

10. The simple heat dissipation wireless charging structure according to claim 1, wherein, The transmitting coil is located in the middle of the housing.

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