Charging device

Abstract

The embodiment of the utility model provides a charging device which comprises a refrigeration sheet, a wireless transmitting coil and a magnet, the refrigeration sheet is provided with a cold effect surface and a heat effect surface, the wireless transmitting coil is arranged on the cold effect surface of the refrigeration sheet, and the magnet is arranged on the cold effect surface of the refrigeration sheet. And the surface, far away from the refrigeration sheet, of the magnet is higher than the surface, far away from the refrigeration sheet, of the wireless transmitting coil. The magnet is magnetically adsorbed to the electronic equipment, the wireless transmitting coil can supply power to the electronic equipment, and the electronic equipment is charged. The refrigeration sheet releases cold energy to the magnet, the magnet can be thermally coupled with the electronic equipment, and the cold energy of the magnet can reduce the temperature of the electronic equipment, so that the electronic equipment is safely charged. In the period, the height of the wireless transmitting coil is lower than that of the magnet, so that the wireless transmitting coil is not in thermal contact with the electronic equipment, heat of the wireless transmitting coil is prevented from being transferred to the electronic equipment, and the charging safety of the electronic equipment is further improved.

Description

Technical Field

[0001] This application relates to the field of charging equipment technology, and specifically to a charging device. Background Technology

[0002] A charging device is a portable personal charging tool primarily used to provide power to consumer electronics products such as mobile phones, tablets, and digital cameras. In situations where an external battery is unavailable, the charging device ensures the continued operation of these electronic devices, solving the problem of insufficient power. To improve portability and efficiency, charging devices typically incorporate a built-in wireless transmitting coil that emits current signals to charge the electronic device. However, the wireless transmitting coil releases a significant amount of heat during charging, which is transferred to the electronic device. This increased temperature can damage the device and may even lead to spontaneous combustion, seriously impacting user safety. Utility Model Content

[0003] This application provides a charging device to at least partially improve the above-mentioned technical problems.

[0004] This application provides a charging device including a cooling chip, a wireless transmitting coil, and a magnet. The cooling chip has a cold effect surface and a hot effect surface. The wireless transmitting coil is disposed on the cold effect surface of the cooling chip, and the magnet is disposed on the cold effect surface of the cooling chip, with the surface of the magnet away from the cooling chip being higher than the surface of the wireless transmitting coil away from the cooling chip.

[0005] In one embodiment, a magnet surrounds the outside of the wireless transmitting coil and forms a cold cavity, within which the wireless transmitting coil is located.

[0006] In one embodiment, the charging device further includes a shielding layer disposed on the cold effect surface and located within the cold cavity, a wireless transmitting coil disposed on the shielding layer, and a gap between the outer edge of the shielding layer and the inner edge of the magnet.

[0007] In one embodiment, there are multiple magnets, which are distributed circumferentially along the outer edge of the cooling effect surface.

[0008] In one embodiment, the charging device further includes a first thermally conductive sheet disposed between the cooling surface and the magnet.

[0009] In one embodiment, the first thermally conductive sheet is magnetically attracted to the surface of the magnet near the cooling sheet.

[0010] In one embodiment, the charging device further includes a housing, a cooling chip, a wireless transmitting coil, and a magnet disposed within the housing, with the wireless transmitting coil spaced apart from the housing and the magnet thermally coupled to the housing.

[0011] In one embodiment, the charging device further includes a second temperature-conducting sheet, which is disposed on the thermal effect surface of the cooling sheet and is thermally coupled to the thermal effect surface of the cooling sheet. The outer casing has heat dissipation holes, which are correspondingly disposed with the second temperature-conducting sheet.

[0012] In one embodiment, the second thermally conductive sheet includes a first part and a second part, which are connected and thermally coupled. The first part is thermally coupled to the thermally effective surface, and the second part is correspondingly disposed with the heat dissipation hole.

[0013] In one embodiment, the charging device further includes a battery and a heat insulation layer. The battery is electrically connected to a wireless transmitting coil and is disposed on the side of the second thermal conductive sheet away from the cooling sheet. The heat insulation layer is disposed between the battery and the second thermal conductive sheet.

[0014] The charging device provided in this application embodiment uses a magnet magnetically attached to an electronic device, and a wireless transmitting coil supplies power to the electronic device for charging. A cooling element releases cold energy to the magnet, allowing the magnet to thermally couple with the electronic device. The cooling energy of the magnet lowers the temperature of the electronic device, ensuring safe charging. During this process, the height of the wireless transmitting coil is lower than the height of the magnet. This arrangement prevents the wireless transmitting coil from thermally contacting the electronic device, avoiding heat transfer from the wireless transmitting coil to the electronic device and further improving charging safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments 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 from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a charging device proposed in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of another charging device proposed in an embodiment of this application;

[0018] Figure 3 This is an exploded structural diagram of a charging device according to an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the structure of a second thermal conductive sheet according to an embodiment of this application;

[0020] Figure 5 for Figure 2 Sectional view along the middle AA.

[0021] Reference numerals: charging device 1, housing 10, heat dissipation hole 11, cooling plate 20, cold effect surface 21, hot effect surface 22, wireless transmitting coil 30, magnet 40, cold cavity 41, shielding layer 51, gap 511, first temperature conducting plate 52, second temperature conducting plate 53, first part 531, second part 532, battery 60, battery cell 61, circuit board 62, heat insulation layer 70, electronic equipment. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0023] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; they can refer to mere surface contact; or they can refer to surface contact connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as referring to specific or particular structures. The terms "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this application, as well as the features of different embodiments or examples.

[0025] A charging device is a portable personal charging tool primarily used to provide power to consumer electronics products such as mobile phones, tablets, and digital cameras. In situations where an external battery is unavailable, the charging device ensures the continued operation of these electronic devices, solving the problem of insufficient power. To improve portability and efficiency, charging devices typically incorporate a built-in wireless transmitting coil that emits current signals to charge the electronic device. However, the wireless transmitting coil releases a significant amount of heat during charging, which is transferred to the electronic device. This increased temperature can damage the device and may even lead to spontaneous combustion, seriously impacting user safety.

[0026] In view of the above problems, this application provides a charging device 1. Please refer to [link to relevant documentation]. Figure 1 The charging device 1 can be used to charge electronic devices and has safer temperature control. The electronic devices can be mobile phones, tablets, digital cameras, Bluetooth headsets, etc.; this embodiment does not limit the types of electronic devices.

[0027] Please see Figure 2 The charging device 1 may include a cooling plate 20, a wireless transmitting coil 30, and a magnet 40, with the magnet 40 and the wireless transmitting coil 30 both disposed on the cooling plate 20.

[0028] In this embodiment, please refer to the following: Figure 1 as well as Figure 2 The charging device 1 may also include a housing 10, within which the cooling element 20, the wireless transmitting coil 30, and the magnet 40 can all be housed. The housing 10 can be made of glass, plastic, ceramic, or a combination thereof, and this embodiment is not limited thereto. The housing 10 provides a certain level of protection; specifically, when the charging device 1 is dropped, the force at the point of impact can be distributed to other parts to share the load, thereby avoiding or reducing damage to internal components such as the cooling element 20, the wireless transmitting coil 30, and the magnet 40 during the drop, and improving the safety performance of the charging device 1.

[0029] Furthermore, the outer casing 10 can be composed of multiple layers, that is, the outer casing 10 can have inner and outer layers, and the multi-layer structure can further protect the components inside the outer casing 10. Alternatively, the outer casing 10 can be assembled from multiple structures to facilitate the installation of internal components such as the cooling chip 20, the wireless transmitting coil 30, and the magnet 40. Therefore, this embodiment does not impose any limitations on the outer casing 10.

[0030] In addition, the outer casing 10 may also have a frame, which can be a metal frame or a plastic frame, etc., and this embodiment is not limited to any particular type. The frame has high structural strength, which can effectively resist external impacts, bumps, and other forces, prevent the outer casing 10 from deforming, improve the protection of internal components, and further improve the safety of the charging device 1.

[0031] In some other cases, the charging device 1 is not equipped with a housing 10, and at least a portion of its internal components can be exposed to the air to achieve efficient heat exchange between the internal components and the air. Furthermore, the surface of the charging device 1 can be insulated to prevent leakage or other safety issues.

[0032] In this embodiment, please refer to the following: Figure 2 as well as Figure 3 The thermoelectric cooler 20 can be a semiconductor thermoelectric cooler, having a cold effect surface 21 and a hot effect surface 22. Based on the thermoelectric effect, one surface of the thermoelectric cooler 20 absorbs heat, while the other surface releases heat. The surface that absorbs heat is the cold effect surface 21, and the surface that releases heat is the hot effect surface 22. In other words, the thermoelectric cooler 20 can include N-type semiconductors and P-type semiconductors. When the thermoelectric cooler 20 is energized, electrons flow from the N-type semiconductor to the P-type semiconductor (forward current). During this process, the surface of the P-type semiconductor material absorbs heat from the surrounding environment, causing its temperature to decrease, thus becoming the cold effect surface 21. Conversely, the surface of the N-type semiconductor material releases heat, causing its temperature to increase, thus becoming the hot effect surface 22.

[0033] Conversely, when the direction of the current flowing through the cooler 20 is reversed (reverse current), the direction of heat transfer will also be reversed. The surface of the N-type semiconductor material becomes the cold effect surface 21, and the surface of the P-type semiconductor material becomes the hot effect surface 22. This embodiment does not limit the formation method of the hot effect surface 22 and the cold effect surface 21, nor the direction of the current flowing through them.

[0034] In addition, the thermal effect surface 22 and the cold effect surface 21 are arranged opposite to each other to achieve heat transfer. Furthermore, by changing the structure and position of the semiconductor material within the cooling chip 20, the thermal effect surface 22 and the cold effect surface 21 can be arranged adjacent to each other to adapt to different charging devices 1.

[0035] In one embodiment, a magnet 40 is disposed on the cooling surface 21 of the cooling element 20. In other words, the cooling surface 21 of the cooling element 20 can come into contact with the magnet 40, and the cooling surface 21 can absorb the heat from the magnet 40. Furthermore, the charging device 1 has a housing 10, and the magnet 40 is disposed between the cooling element 20 and the housing 10, transferring heat from the housing 10 to the cooling surface 21 of the cooling element 20. Additionally, the housing 10 may have heat dissipation holes 11 for heat dissipation from the heating surface 22. The heating surface 22 can dissipate heat through the heat dissipation holes 11, transferring the heat of the electronic device to the outside atmosphere. This prevents heat from accumulating inside the housing 10, ensuring the cooling effect of the cooling element 20.

[0036] Preferably, the thermal surface 22 of the cooling chip 20 can also be equipped with a heat dissipation device (not shown), which includes, but is not limited to, heat dissipation fins and a cooling fan. The heat dissipation device can increase the heat dissipation area of ​​the thermal surface 22 and improve the cooling effect of the cooling chip 20.

[0037] In this embodiment, please continue to refer to Figure 2 as well as Figure 3 The wireless transmitting coil 30 enables wireless power transfer, meaning it can transmit electrical energy to an electronic device. When the wireless transmitting coil 30 is energized, a magnetic field is generated around it. For example, if an electronic device has a wireless receiving coil, and both the electronic device and its wireless receiving coil are placed near the wireless transmitting coil 30, and their magnetic fields couple, an induced current will be generated in the wireless receiving coil. This induced current enters the battery 60 of the electronic device, thus enabling the charging operation of the electronic device.

[0038] In addition, the wireless transmitting coil 30 can be disposed on the cooling surface 21 of the cooling chip 20. The cooling capacity of the cooling surface 21 can effectively reduce the operating temperature of the wireless transmitting coil 30 and improve the operating efficiency of the wireless transmitting coil 30.

[0039] Furthermore, the wireless transmitting coil 30 is a toroidal wire winding, and the number of turns of the wireless transmitting coil 30 can be one or more. The size and number of turns of the wireless transmitting coil 30 are not limited, and are designed and selected according to the power of the specific charging device 1, the battery capacity of the electronic device 60, etc. Moreover, the shape of the wireless transmitting coil 30 can be circular, etc., as a circular structure of the wireless transmitting coil 30 can generate a more uniform magnetic field distribution. In other cases, the shape of the wireless transmitting coil 30 can also be rectangular, triangular, or other irregular shapes to suit different types of electronic devices; this embodiment does not impose any limitations.

[0040] In this embodiment, please continue to refer to Figure 2 as well as Figure 3Magnet 40 can be a permanent magnet, such as a samarium cobalt magnet or a neodymium iron boron magnet, which can maintain a certain magnetism after being magnetized. Magnet 40 is used to magnetically attract electronic devices. More specifically, the electronic device can also have a magnetized body, and magnet 40 can magnetically attract the magnetized body to shorten the distance between the electronic device and the wireless transmitting coil 30 and improve the wireless charging efficiency of the charging device 1. The magnetized body can be a permanent magnet, a magnetic metal, etc., and this embodiment is not limited to these.

[0041] In one implementation, please refer to [link / reference needed]. Figure 2 A magnet 40 surrounds the outside of the wireless transmitting coil 30, forming a cold cavity 41 within which the wireless transmitting coil 30 is located. The magnet 40 further enhances the protective capabilities of the wireless transmitting coil 30, ensuring its safe operation. In addition, the cooling surface 21 emits cold energy, which is transferred within the cold cavity 41, providing a cooling effect. This cold energy lowers the temperature of the wireless transmitting coil 30 within the cold cavity 41, preventing its high temperature from affecting its normal operation and further improving its working efficiency.

[0042] In addition, the surface of magnet 40 away from the cooling element 20 is higher than the surface of wireless transmitting coil 30 away from the cooling element 20. In one embodiment, please refer to... Figure 4 The charging device 1 is not equipped with a housing 10. When the magnet 40 can be magnetically attracted to the electronic device, the wireless transmitting coil 30 supplies power to the electronic device. The electronic device has a receiving coil that receives the wireless signal emitted by the wireless transmitting coil 30 to realize the charging operation of the electronic device.

[0043] However, the temperature of the receiving coil of the electronic device will also rise, leading to an increase in the temperature of the electronic device itself and posing certain safety concerns. In this embodiment, the surface of the magnet 40 can contact the electronic device, allowing for thermal coupling. The magnet 40 absorbs heat from the electronic device and dissipates it outside the charging device 1 via the cooling component 20, ensuring the charging safety of the electronic device. During this process, because the height of the wireless transmitting coil 30 is lower than that of the magnet 40, the wireless transmitting coil 30 can be spaced apart from the electronic device. This arrangement prevents the heat generated by the wireless transmitting coil 30 from being transferred to the magnet 40 and / or the housing 10, thus reducing the operating temperature of the housing 10.

[0044] In another embodiment, the charging device 1 is equipped with a housing 10, and the magnet 40 can be thermally coupled to the housing 10. The electronic device is thermally coupled to the housing 10, and the heat of the electronic device can be transferred to the housing 10. The heat of the housing 10 can be absorbed by the magnet 40 and transferred to the cooling chip 20, which reduces the heat of the housing 10 itself, making it easier for the user to hold and use, and improving the charging safety of the electronic device.

[0045] During this period, since the height of the wireless transmitting coil 30 is lower than the height of the magnet 40, the wireless transmitting coil 30 can be spaced apart from the housing 10. This arrangement can prevent the heat generated by the operation of the wireless transmitting coil 30 from being transferred to the magnet 40 and / or the housing 10, thereby reducing the operating temperature of the housing 10.

[0046] In this embodiment, please refer to Figure 3 as well as Figure 4 The charging device 1 may also include a shielding layer 51, which can weaken or block the transmission of wireless signals, such as Teflon. The shielding layer 51 is disposed on the cooling effect surface 21 and located in the cooling cavity 41. The wireless transmitting coil 30 is disposed on the shielding layer 51. The shielding layer 51 can block the wireless signals emitted by the wireless transmitting coil 30, so as to prevent the wireless signals from interfering with other components of the charging device 1.

[0047] In addition, the shielding layer 51 can also block heat, preventing a large amount of heat from the wireless transmitting coil 30 from being conducted to the cooling effect surface 21, thus affecting the cooling operation of the cooling chip and the magnet 40. Furthermore, there is a gap 511 between the outer edge of the shielding layer 51 and the inner edge of the magnet 40. The gap 511 can prevent the wireless transmitting coil 30 from transferring heat to the magnet 40, and can also provide electrical insulation between the wireless transmitting coil 30 and the magnet 40, preventing the magnet 40 from conducting electricity and affecting the normal operation of the charging device 1.

[0048] In another implementation, please refer to Figure 3 The number of magnets 40 can be multiple, for example, two, three, three, etc., arranged around the wireless transmitting coil 30. Compared to a single magnet 40, multiple magnets 40 arranged around the coil reduce manufacturing difficulty and subsequent maintenance costs. Furthermore, the multiple magnets 40 are distributed circumferentially along the outer edge of the cooling effect surface 21. This arrangement increases the volume of the cooling cavity 41, preventing the cooling cavity 41 from being too small and limiting the size of the wireless transmitting coil 30, thus improving the charging capacity of the wireless transmitting coil 30.

[0049] In this embodiment, please continue to refer to Figure 3 as well as Figure 4The charging device 1 may further include a first temperature-conducting sheet 52, which may be a metal temperature-conducting sheet, a silicone temperature-conducting sheet, or a graphene temperature-conducting sheet, etc., and this embodiment is not limited thereto. The first temperature-conducting sheet 52 is disposed between the cooling effect surface 21 and the magnet 40. The first temperature-conducting sheet can quickly transfer the cold energy of the cooling effect surface 21 to the magnet 40 to reduce the temperature of the magnet 40. The magnet 40 can absorb the heat from the casing 10 or the electronic device and quickly transfer the heat to the cooling effect surface 21. Furthermore, the first temperature-conducting sheet 52 can accelerate the heat conduction efficiency between the magnet 40 and the cooling effect surface 21, and improve the cooling effect of the cooling chip 20 on the electronic device.

[0050] In one implementation, please refer to Figure 3 The first temperature-conducting sheet 52 is magnetically attracted to the surface of the magnet 40 near the cooling element 20. For example, the first temperature-conducting sheet 52 can be configured as a metal temperature-conducting sheet, and the first temperature-conducting element can be magnetically attracted to the magnet 40. One surface of the first temperature-conducting sheet 52 is connected to the cooling effect surface 21 of the cooling element 20, and the other surface is magnetically attracted to the surface of the magnet 40 near the cooling element 20. This magnetic attraction allows the magnet 40 to be detachably connected to the first temperature-conducting sheet 52, improving the replaceability of the magnet 40, and it can eliminate and absorb external vibrations and impacts.

[0051] Preferably, the magnet 40 can be configured as a ring structure, with the center of the magnet 40 located on the central axis of the wireless transmitting coil 30. This configuration can keep the distance between the inner edge of the magnet 40 and the outer edge of the wireless transmitting coil 30 consistent, improving the utilization rate of the cold cavity 41, while preventing the wireless transmitting coil 30 from dissipating heat to the magnet 40, thus ensuring the heat dissipation effect of the magnet 40.

[0052] In this embodiment, please refer to the following: Figure 3 as well as Figure 4 The charging device 1 may further include a second temperature-conducting sheet 53, which may be a metal temperature-conducting sheet, a silicone temperature-conducting sheet, or a graphene temperature-conducting sheet, etc., and this embodiment is not limited to these. The metal temperature-conducting sheet includes, but is not limited to, copper, aluminum, etc. The second temperature-conducting sheet 53 is disposed on the thermal effect surface 22 of the cooling element, and the second temperature-conducting sheet 53 is thermally coupled to the thermal effect surface 22. When the thermal effect surface 22 releases heat, the second temperature-conducting sheet 53 can absorb the heat from the thermal effect surface 22 and release it into the environment. The second temperature-conducting sheet 53 can increase the heat dissipation area of ​​the thermal effect surface 22, accelerate the heat dissipation efficiency of the thermal effect surface 22, and quickly transfer the heat from the thermal effect surface 22 to the environment, preventing heat from accumulating inside the cooling element 20 and ensuring the normal operation of the cooling element 20.

[0053] In addition, the heat dissipation holes 11 of the outer casing 10 can be strip-shaped, circular, or other irregular shapes. There can be multiple heat dissipation holes 11, and these holes can be located at multiple positions on the outer casing 10; this embodiment does not impose any limitations. One or more heat dissipation holes 11 can be correspondingly arranged with the second thermal conductive sheet 53. The heat dissipation holes 11 can expel heat from the outer casing 10, preventing heat from accumulating inside the outer casing 10 and affecting the normal operation of the cooling element.

[0054] In a more specific implementation, please refer to Figure 5 The second heat-conducting sheet 53 may include a first part 531 and a second part 532, which are connected and thermally coupled. The first part 531 is thermally coupled to the thermal effect surface 22, and its shape and size can be matched to the thermal effect surface 22 to improve the thermal coupling effect between them. Heat from the first part 531 is transferred to the second part 532, which is correspondingly positioned with the heat dissipation hole 11, allowing its heat to be dissipated. The first part 531 and the second part 532 can dissipate heat from the cooling element 20.

[0055] In addition, the heat dissipation hole 11 can also be set in correspondence with the first part 531, and the heat effect surface 22 can be directly transferred from the first part 531 to the heat dissipation hole 11, which further improves the heat dissipation effect of the second heat conduction plate 53, so as to improve the cooling effect of the cooling plate.

[0056] In this embodiment, please refer to Figure 3 The charging device 1 also includes a battery 60 and a heat insulation layer 70. The battery 60 is disposed within the housing 10 and is electrically connected to the wireless transmitting coil 30. The battery 60 supplies power to the wireless transmitting coil 30 to transmit wireless signals. The battery 60 is located within the housing 10 and is disposed on the side of the cooling plate 20 away from the wireless transmitting coil 30.

[0057] It should be noted that the embodiments of this application do not limit the specific form of the battery 60. For example, in one embodiment, the battery 60 may include a battery cell 61 and a circuit board 62, with the battery cell 61 and the circuit board 62 electrically connected. The circuit board 62 is electrically connected to the cooling chip 20 and the wireless transmitting coil 30. The battery cell 61 can be used to store electrical energy and output electrical energy. The circuit board 62 may be provided with a charging and discharging circuit, which can be electrically connected to the battery cell 61 and used to selectively control the charging or discharging of the battery cell 61, so as to control the cooling chip 20 to cool and the wireless transmitting coil 30 to charge or discharge.

[0058] The battery 60 is disposed on the side of the second thermal conductive sheet 53 away from the cooling element. In other words, the battery 60 can be attached to the surface of the second thermal conductive sheet 53 away from the cooling element. This arrangement allows for a more compact distribution of components in the charging device 1, reducing its size and expanding its application scenarios. Here, a heat insulation layer 70 is disposed between the second thermal conductive sheet 53 and the battery 60. The battery 60 is electrically connected to the cooling element 20 and the wireless transmitting coil 30. The heat insulation layer 70 prevents heat from the second thermal conductive sheet 53 from being transferred into the battery 60, thereby reducing the impact of temperature on the battery 60 and improving the safety of the charging device 1.

[0059] Understandably, Figure 3 The second thermal conductive sheet 53 is shown only in its relative relationship with the thermal effect surface 21. To improve the heat dissipation effect of the thermal effect surface 21, the shape, size, and distribution of the second thermal conductive sheet 53 are not limited, and can be selected according to specific implementation methods and requirements. For example, the second thermal conductive sheet 53 can be configured to be sufficiently large, and can cover the outer wall of the battery 60, thereby increasing the heat dissipation effect of both the battery 60 and the thermal effect surface 21.

[0060] The charging device 1 provided in this embodiment uses a magnet 40 magnetically attached to an electronic device, and a wireless transmitting coil 30 to supply power to the electronic device for charging. A cooling element releases cold energy to the magnet 40, allowing the magnet 40 to thermally couple with the electronic device. The cooling energy of the magnet 40 lowers the temperature of the electronic device, ensuring safe charging. During this process, the height of the wireless transmitting coil 30 is lower than the height of the magnet 40. This arrangement prevents the wireless transmitting coil 30 from thermally contacting the electronic device, avoiding heat transfer from the wireless transmitting coil 30 to the electronic device and further improving charging safety.

[0061] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A charging device, characterized by, The charging device comprises: a refrigeration sheet having a cold effect surface and a hot effect surface; a wireless transmitting coil arranged on the cold effect surface of the refrigeration sheet; and a magnet arranged on the cold effect surface of the refrigeration sheet, and a surface of the magnet away from the refrigeration sheet is higher than a surface of the wireless transmitting coil away from the refrigeration sheet. The magnet surrounds the outside of the wireless transmitting coil and forms a cold cavity in which the wireless transmitting coil is located.

2. The charging device of claim 1, wherein, The charging device further comprises a shielding layer arranged on the cold effect surface and located in the cold cavity, the wireless transmitting coil is arranged on the shielding layer, and a gap is formed between the outer edge of the shielding layer and the inner edge of the magnet.

3. The charging device of claim 2, wherein, The number of the magnets is multiple, and the multiple magnets are distributed along the outer edge of the cold effect surface in a circumferential direction.

4. The charging device of claim 2, wherein, The charging device further comprises a first temperature conducting sheet arranged between the cold effect surface and the magnet.

5. The charging device of claim 1, wherein, The first temperature conducting sheet is magnetically adsorbed on the surface of the magnet close to the refrigeration sheet.

6. The charging device of claim 5, wherein, The charging device further comprises a housing, the refrigeration sheet, the wireless transmitting coil and the magnet are arranged in the housing, the wireless transmitting coil is arranged in a spaced manner with the housing, and the magnet is thermally coupled with the housing.

7. The charging device of claim 1, wherein, The charging device further comprises a second temperature conducting sheet arranged on the hot effect surface of the refrigeration sheet, and the second temperature conducting sheet is thermally coupled with the hot effect surface of the refrigeration sheet, the housing is provided with a heat dissipation hole corresponding to the second temperature conducting sheet.

8. The charging device of claim 7, wherein, The second temperature conducting sheet comprises a first part and a second part, the first part and the second part are connected and thermally coupled, the first part is thermally coupled with the hot effect surface, and the second part is arranged corresponding to the heat dissipation hole.

9. The charging device of claim 8, wherein, The charging device further comprises a battery and a heat insulation layer, the battery is electrically connected with the wireless transmitting coil, the battery is arranged on the side of the second temperature conducting sheet away from the refrigeration sheet, and the heat insulation layer is arranged between the battery and the second temperature conducting sheet.

10. The charging device of claim 8, wherein, ​

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