Wireless charging device

Abstract

This utility model relates to a wireless charging device, including a housing with a cavity inside. A battery, a transmitting coil, and a cooling component are disposed within the cavity. The transmitting coil and the cooling component are electrically connected to the battery. The housing has a length direction, a width direction, and a thickness direction. The transmitting coil is located on the side of the battery in the thickness direction. A temperature-conducting component is disposed between the battery and the transmitting coil, and is thermally connected to the transmitting coil. A portion of the temperature-conducting component projected along the thickness direction is located inside the battery, and a portion extends beyond the outline edge of the battery to form an extension. The extension, the battery, and the inner wall of the housing enclose a cooling cavity. The cooling component is disposed within the cooling cavity, and its cold end is thermally connected to the temperature-conducting component. This utility model can achieve better cooling of the transmitting coil, avoiding excessively high surface temperatures of electronic devices during wireless charging.

Description

Technical Field

[0001] This utility model relates to the field of charging equipment technology, and in particular to a wireless charging device. Background Technology

[0002] A charging device is a personal, portable charging device primarily used to provide power to consumer electronics products such as mobile phones, tablets, and digital cameras, solving the problem of insufficient battery power when out and about.

[0003] To improve the portability and ease of use of charging devices, some devices incorporate a transmitting coil. This coil generates an alternating magnetic field, and the receiving coil at the electronic device senses this change, generating a current through electromagnetic induction to charge the device. However, the transmitting coil releases a significant amount of heat during charging. This heat is transferred to the electronic device, causing its temperature to rise and potentially leading to damage or even spontaneous combustion, seriously impacting user safety. To prevent overheating during wireless charging, current technology incorporates a cooling component to cool the transmitting coil. However, this cooling component generates heat at its hot end, which can easily be transferred back to the transmitting coil, resulting in ineffective cooling. Utility Model Content

[0004] In view of the above problems, this utility model provides a wireless charging device to solve the technical problem that the charging process of existing wireless charging devices easily leads to excessively high temperatures in electronic devices.

[0005] This utility model provides a wireless charging device, including a housing with a cavity inside. A battery, a transmitting coil, and a cooling component are disposed within the cavity. The transmitting coil and the cooling component are electrically connected to the battery. The housing has a length direction, a width direction, and a thickness direction. The transmitting coil is located on one side of the battery in the thickness direction. A temperature-conducting component is disposed between the battery and the transmitting coil, and is thermally connected to the transmitting coil. A portion of the temperature-conducting component projected along the thickness direction is located inside the battery, and a portion extends beyond the outline edge of the battery to form an extension. The extension, the battery, and the inner wall of the housing enclose a cooling cavity. The cooling component is disposed in the cooling cavity, and its cold end is thermally connected to the temperature-conducting component.

[0006] In one alternative embodiment, the side surface of the battery facing the temperature conductor is covered with a heat insulation element, the heat insulation element being located between the temperature conductor and the battery.

[0007] In one alternative approach, the thermal insulation element at least completely covers the overlapping area between the thermal conductive element and the battery.

[0008] In one alternative embodiment, the cooling cavity is located at one end of the length of the housing.

[0009] In one alternative embodiment, the cooling cavity is further provided with a radiator, which is thermally connected to the hot end of the cooling component.

[0010] In an alternative embodiment, the cooling cavity is further provided with a counterweight, the counterweight having a density greater than that of the radiator.

[0011] In one alternative embodiment, the counterweight is embedded within the radiator.

[0012] In one alternative embodiment, the density of the counterweight is greater than or equal to 15 g / cm³. 3 .

[0013] In one alternative embodiment, a control cavity is further formed between the battery and the inner wall of the housing. The control cavity is located at the other end of the housing along its length, opposite to the cooling cavity. A control board is disposed within the control cavity, and the battery, the transmitting coil, and the cooling element are electrically connected to the control board.

[0014] In one alternative, the projection of the transmitting coil along the thickness direction lies within the temperature-conducting element.

[0015] In one alternative embodiment, a magnet is disposed within the accommodating cavity, the magnet being arranged around the periphery of the transmitting coil, the magnet being located on the side of the temperature-conducting element away from the cooling element and being thermally connected to the temperature-conducting element.

[0016] This embodiment of the invention features a transmitting coil disposed on one side of the battery along the thickness direction of the casing, with a temperature-conducting element between the battery and the transmitting coil. The temperature-conducting element is thermally connected to the transmitting coil, and the projected portion of the temperature-conducting element along the thickness direction of the casing is located inside the battery, extending beyond the outline edge of the battery to form an extension. The extension, the battery, and the inner wall of the casing enclose a cooling cavity, in which a cooling element is disposed. The cold end of the cooling element is thermally connected to the temperature-conducting element, thereby cooling the transmitting coil through the temperature-conducting element. Since the cooling element is disposed inside the cooling cavity, the hot end of the cooling element and the transmitting coil are isolated by the temperature-conducting element. The heat generated by the hot end of the cooling element is mainly concentrated inside the cooling cavity and is not easily transferred to the transmitting coil, thus achieving better cooling of the transmitting coil and avoiding excessively high surface temperatures of the electronic device during wireless charging.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a structural diagram of the present invention in its assembled state.

[0020] Figure 2 for Figure 1 Sectional view along the middle AA.

[0021] Figure 3 for Figure 1 A cross-sectional view along the middle AA from another perspective.

[0022] Figure 4 This is a schematic diagram of the internal assembly structure of this utility model.

[0023] Figure 5 for Figure 4 A structural diagram from another perspective.

[0024] Figure 6 This is a schematic diagram showing the disassembled state of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Housing; 11. Receiving cavity; 12. Bottom shell; 13. Cover; 121. Receiving groove; 2. Battery; 3. Transmitting coil; 4. Cooling component; 5. Temperature conducting component; 51. Extension; 111. Cooling cavity; 112. Control cavity; 6. Heat insulation component; 7. Radiator; 71. Base plate; 72. Heat dissipation column; 8. Control board; 9. Magnet; 10. Protective component. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0028] Please see Figures 1 to 6As shown, this utility model provides a wireless charging device, including a housing 1, in which a receiving cavity 11 is provided. The housing 1 may include a bottom shell 12 and a cover 13. The bottom shell 12 has a recessed receiving groove 121, and the cover 13 covers the bottom shell 12 and closes the receiving groove 121, thereby forming the receiving cavity 11. A battery 2, a transmitting coil 3, and a cooling component 4 are disposed in the receiving cavity 11. The transmitting coil 3 and the cooling component 4 are electrically connected to the battery 2. The housing 1 has a length direction X, a width direction Z, and a thickness direction Y. The transmitting coil 3 is located on the side of the battery 2 in the thickness direction Y. When the transmitting coil 3 is working, it generates an alternating magnetic field. After the receiving coil at the electronic device senses the change in the magnetic field, it generates a current through electromagnetic induction, thereby charging the electronic device. A temperature-conducting component 5 is provided between the battery 2 and the transmitting coil 3. The temperature-conducting component 5 may be as follows: Figure 6 The sheet-like structure shown can also be other shapes with irregular thickness. The temperature-conducting element 5 is thermally connected to the transmitting coil 3. The projection portion of the temperature-conducting element 5 along the thickness direction Y is located inside the battery 2, and a portion extends out of the outline edge of the battery 2 to form an extension 51. The extension 51, the battery 2, and the inner wall of the housing 1 enclose to form a cooling cavity 111. The cooling element 4 is disposed in the cooling cavity 111, and the cold end of the cooling element 4 is thermally connected to the temperature-conducting element 5.

[0029] This embodiment of the invention provides a transmitting coil 3 on one side of the battery 2 along the thickness Y direction of the housing 1, and a heat-conducting element 5 between the battery 2 and the transmitting coil 3. The heat-conducting element 5 is thermally connected to the transmitting coil 3. The projection portion of the heat-conducting element 5 along the thickness Y direction of the housing 1 is located inside the battery 2, and a portion extends beyond the outline edge of the battery 2 to form an extension 51. The extension 51, the battery 2, and the inner wall of the housing 1 enclose a cooling cavity 111. A cooling element 4 is disposed in the cooling cavity 111, and the cold end of the cooling element 4 is thermally connected to the heat-conducting element 5. Thus, the transmitting coil 3 is cooled by the heat-conducting element 5. Since the cooling element 4 is disposed in the cooling cavity 111, the hot end of the cooling element 4 and the transmitting coil 3 are isolated by the heat-conducting element 5. The heat generated by the hot end of the cooling element 4 is mainly concentrated in the cooling cavity 111 and is not easily transferred to the transmitting coil 3. This achieves better cooling of the transmitting coil 3 and avoids excessively high surface temperatures of the electronic device during the wireless charging process.

[0030] In addition, by placing the cooling component 4 inside the cooling cavity 111 formed by the extension 51, the battery 2 and the inner wall of the housing 1, the thickness of the wireless charging device can be avoided by placing the cooling component 4, which is more conducive to the product to be thinner and lighter. The thickness of the transmitting coil 3 and the temperature conducting component 5 is relatively low. Placing the transmitting coil 3 on the side of the battery 2 in the thickness direction Y of the housing 1 and placing the temperature conducting component 5 between the battery 2 and the transmitting coil 3 will not significantly increase the overall thickness of the wireless charging device.

[0031] Furthermore, since battery 2 provides power to transmitting coil 3 when it is operating, and battery 2 also generates heat when outputting power, to prevent heat transfer between battery 2 and transmitting coil 3 and thus affecting the heat dissipation of transmitting coil 3, please refer to... Figure 5 and Figure 6 As shown, the surface of the battery 2 facing the temperature-conducting element 5 is covered with a heat-insulating element 6, which is located between the temperature-conducting element 5 and the battery 2. The heat-insulating element 6 can be made of heat-insulating cotton or other materials with heat-insulating properties. In addition, a protective element 10 with a cushioning function can be wrapped around the battery 2 to prevent damage to the battery 2 when the wireless charging device is dropped; for example, the battery surface can be covered with protective foam.

[0032] To better provide heat insulation, the heat insulation component 6 at least completely covers the overlapping area between the temperature-conducting component 5 and the battery 2, thereby preventing the heat generated by the battery 2 from being transferred to the temperature-conducting component 5 and avoiding a reduction in the cooling performance of the temperature-conducting component 5. Furthermore, the heat insulation component 6 completely covers the surface of the battery 2 facing the temperature-conducting component 5, thereby further preventing the heat generated by the battery 2 during operation from being transferred to the temperature-conducting component 5 and the transmitting coil 3.

[0033] In addition, since the user mainly holds the wireless charging device in the middle, and since the cooling component 4 generates a certain amount of heat when the cooling chamber 111 is working, in order to avoid the user from touching the cooling chamber 111 and causing discomfort, the cooling chamber 111 is located at one end of the length direction X of the housing 1.

[0034] To quickly transfer the heat generated by the hot end of the cooling component 4 during operation, the cooling chamber 111 is also equipped with a heat sink 7, which is thermally connected to the hot end of the cooling component 4. The heat sink 7 can be made of a high thermal conductivity material such as copper or aluminum. The heat sink 7 absorbs the heat generated by the hot end of the cooling component 4 during operation and transfers it to the air through the housing 1, thereby preventing heat buildup at the hot end of the cooling component 4 from causing low cooling efficiency at the cold end. To improve heat dissipation efficiency, the heat sink 7 can be in direct contact with the inner wall of the housing, or a thermally conductive material can be placed between the heat sink 7 and the inner wall of the housing 1, thereby quickly transferring the heat from the heat sink 7 to the housing 1. Simultaneously, the housing 1 can also have ventilation holes corresponding to the location of the heat sink 7 for better heat dissipation. However, opening ventilation holes in the housing 1 makes it easy for liquid to enter, potentially causing short circuits in the electronic components inside the housing 1. Therefore, a waterproof design is required inside the cooling chamber 111. Please refer to... Figure 5As shown, the heat sink 7 may include a base plate 71 and a plurality of heat dissipation fins or heat dissipation columns 72 disposed on the base plate 71. The base plate 71 is thermally connected to the hot end of the cooling component 4. The heat dissipation fins or heat dissipation columns 72 extend from the base plate 71 toward the side away from the cooling component 4. The heat dissipation fins or heat dissipation columns 72 can increase the contact area with air, thereby promoting heat dissipation. The gaps between the heat dissipation fins or heat dissipation columns 72 can also facilitate air flow, thereby removing the heat from the surface of the heat sink 7 through air flow.

[0035] Since wireless charging devices are typically attached to the back of electronic devices, and cameras are usually located on the upper back of devices like mobile phones, the center of gravity of the combined device is shifted when the wireless charging device is attached to the back of the phone. This makes the device feel heavier when held. To shift the center of gravity of the combined device closer to the center, the cooling cavity 111 is equipped with a counterweight, which has a higher density than the heat sink 7. Because the cooling cavity 111 is located at one end of the length X direction of the housing 1, the counterweight increases the weight at that end. When using the wireless charging device, the user can attach the device with the cooling cavity 111 facing upwards towards the back of the electronic device, thus shifting the center of gravity closer to the center and improving the user's grip.

[0036] Furthermore, the counterweight is embedded within the radiator 7. Pre-embedding the counterweight within the radiator 7 reduces the number of components required for assembly; only the radiator 7 needs to be assembled during assembly. Specifically, an assembly groove can be formed on the surface of the radiator 7, and the counterweight can be fixed within the groove using adhesive or mechanical clips.

[0037] In one optional embodiment, the density of the counterweight is greater than or equal to 15 g / cm³. A higher counterweight density results in a greater mass for the same volume, thus avoiding an excessively large counterweight that would make the wireless charging device too bulky. Selecting a counterweight density of 15 g / cm³ or greater achieves the effect of increasing weight without increasing volume. The counterweight can be a metal component, such as tungsten, osmium, iridium, or platinum, or an alloy based on these metals, such as tungsten alloys, osmium alloys, iridium alloys, or platinum alloys. The counterweight can also be other non-metallic components with a density greater than or equal to 15 g / cm³.

[0038] In addition, a control cavity 112 is formed between the battery 2 and the inner wall of the housing 1. The control cavity 112 is located at the other end of the housing 1 along the length X direction opposite to the cooling cavity 111. A control board 8 is disposed in the control cavity 112. The battery 2, the transmitting coil 3, and the cooling element 4 are electrically connected to the control board 8. The control board 8 can control the working state of the battery 2, the transmitting coil 3, and the cooling element 4. The cooling element 4 is located at one end of the housing 1 along the length X direction, the control board 8 is located at the other end of the housing 1 along the length X direction opposite to the cooling element 4, and the battery 2 is located between the cooling element 4 and the control board 8. That is, the control board 8, the battery 2, and the cooling element 4 are distributed sequentially along the length X direction of the housing 1. Since the hot ends of the control board 8, the battery 2, and the cooling element 4 all generate heat when working, distributing the control board 8, the battery 2, and the cooling element 4 sequentially along the length X direction of the housing 1 can better achieve uniform heat distribution and avoid local overheating of the wireless charging device.

[0039] Preferably, the projection of the transmitting coil 3 along the thickness direction Y of the housing 1 is located inside the temperature-conducting element 5, that is, the temperature-conducting element 5 completely covers the transmitting coil 3, so as to better cool down the transmitting coil 3 and avoid the local temperature of the transmitting coil 3 being too high.

[0040] Additionally, a magnet 9 is disposed within the accommodating cavity 11, surrounding the transmitting coil 3. The magnet 9 is located on the side of the temperature-conducting element away from the cooling element 4 and is thermally connected to the temperature-conducting element 5. The magnet 9 in this wireless charging device can magnetically attract magnetic components within the electronic device, allowing the wireless charging device to be attached to the electronic device for charging, improving ease of use. Simultaneously, the magnet 9 is thermally connected to the temperature-conducting element 5, allowing the coolness on the temperature-conducting element 5 to be transferred to the electronic device through the magnet 9, thereby cooling the electronic device.

[0041] In the description of this embodiment of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0042] Furthermore, technical terms such as "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 indicated. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0043] In the description of this embodiment of the invention, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0044] In the description of this embodiment of the invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wireless charging device, characterized by, The device includes a housing with a cavity inside. A battery, a transmitting coil, and a cooling component are disposed within the cavity. The transmitting coil and the cooling component are electrically connected to the battery. The housing has a length direction, a width direction, and a thickness direction. The transmitting coil is located on one side of the battery in the thickness direction. A temperature-conducting component is provided between the battery and the transmitting coil, and is thermally connected to the transmitting coil. A portion of the temperature-conducting component projected along the thickness direction is located inside the battery, and a portion extends beyond the outline edge of the battery to form an extension. The extension, the battery, and the inner wall of the housing enclose a cooling cavity. The cooling component is disposed within the cooling cavity, and its cold end is thermally connected to the temperature-conducting component.

2. The wireless charging device of claim 1, wherein, The surface of the battery facing the temperature-conducting element is covered with a heat-insulating element, which is located between the temperature-conducting element and the battery.

3. The wireless charging device of claim 2, wherein, The heat insulation component at least completely covers the overlapping area between the heat-conducting component and the battery.

4. The wireless charging device of any one of claims 1 to 3, wherein, The cooling chamber is located at one end of the length of the housing.

5. The wireless charging device of claim 4, wherein, The cooling chamber is also equipped with a radiator, which is thermally connected to the hot end of the cooling component.

6. The wireless charging device according to claim 5, characterized in that, The cooling chamber is also equipped with a counterweight, the density of which is greater than that of the radiator.

7. The wireless charging device of claim 6, wherein, The counterweight is embedded in the radiator.

8. The wireless charging device of claim 7, wherein, The density of the counterweight is greater than or equal to 15 g / cm 3 .

9. The wireless charging device of claim 4, wherein, A control cavity is also formed between the battery and the inner wall of the housing. The control cavity is located at the other end of the housing opposite to the cooling cavity in the length direction. A control board is provided in the control cavity. The battery, the transmitting coil and the cooling component are electrically connected to the control board.

10. The wireless charging device of any one of claims 1 to 3, wherein, The projection of the transmitting coil along the thickness direction is located within the temperature-conducting element.

11. The wireless charging device of any one of claims 1 to 3, wherein, A magnet is disposed inside the accommodating cavity, and the magnet is arranged around the periphery of the transmitting coil. The magnet is located on the side of the temperature-conducting element away from the cooling element and is thermally connected to the temperature-conducting element.

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