Wireless charging device
By using thermal conductivity modules and cooling fans in wireless charging devices, the problem of insufficient heat dissipation capabilities of the device is solved, and the effect of efficient heat dissipation and higher charging power is achieved.
Patent Information
- Application Number
- CN202323550542.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2033-12-25
AI Technical Summary
The existing wireless charging devices lack heat dissipation capabilities, resulting in small charging power. Long-term charging will lead to heat accumulation inside the device, further reducing the charging power, bringing users a bad experience.
A wireless charging device is designed, using a thermal conductivity module to contact the coil and the circuit board, transfer heat through the thermal conductivity hole, and a cooling fan is installed on the circuit board to enhance the heat dissipation effect.
It effectively improves the cooling performance of the wireless charging device, so that it can maintain a high charging power under the charging state, extends its service life and improves the user experience.
Smart Images
Figure CN222814244U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of charging equipment, and in particular to a wireless charging device. Background Art
[0002] Wireless charging refers to a charging method that does not require the use of a traditional charging cable to connect the device to a power source. Wireless charging can use the principle of electromagnetic induction to transfer energy between the charging device and the electronic device to be charged.
[0003] In the related art, the charging power of wireless charging devices is usually small due to the limitation of the heat dissipation capacity of wireless charging devices. In addition, since wireless charging devices generate a lot of heat during the charging process, this heat cannot be effectively dissipated during the charging process. Therefore, long-term wireless charging will also cause heat accumulation inside the wireless charging device, causing the charging power to be further reduced, resulting in a bad experience for users. Utility Model Content
[0004] In order to overcome the problems existing in the related art, the present disclosure provides a wireless charging device.
[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a wireless charging device, comprising: a housing, and a circuit board, a coil, and a heat conduction module arranged inside the housing;
[0006] A heat conduction hole is provided on the circuit board; the coil is arranged on one side of the circuit board and is electrically connected to the circuit board; and the heat conduction module is fixed in the heat conduction hole and is in contact with the coil.
[0007] In some embodiments, the heat conducting module includes a heat conducting sheet and a heat conducting grid. The heat conducting sheet is embedded in the heat conducting hole, and the heat conducting grid is fixed on a side of the heat conducting sheet away from the coil.
[0008] In some embodiments, the heat conductive sheet is a semiconductor refrigeration sheet, which includes a cold end and a hot end, wherein the cold end is in contact with the coil, and the hot end is fixedly connected to the heat conductive grid.
[0009] In some embodiments, the wireless charging device further includes a power supply module; the power supply module is disposed on a side of the circuit board away from the coil and is spaced apart from the thermal conductive grid.
[0010] In some embodiments, the wireless charging device further includes a cooling fan, the power supply module and the circuit board form a cooling air duct, and the cooling fan is used to send air into the cooling air duct.
[0011] In some embodiments, the heat dissipation fan is disposed on a side of the heat conductive grid.
[0012] In some embodiments, an air inlet and an air outlet are provided on the shell, and the air inlet and the air outlet are arranged on two sides of the heat dissipation duct relatively.
[0013] In some embodiments, the wireless charging device further includes a magnetic ring, which is fixed on the housing on a side of the coil away from the circuit board.
[0014] In some embodiments, the magnetic ring is arranged concentrically with the coil.
[0015] In some embodiments, the circuit board includes a voltage conversion circuit, a control circuit, and a full-bridge circuit electrically connected in sequence;
[0016] The voltage conversion circuit is electrically connected to the power supply module, and the full-bridge circuit is electrically connected to the coil.
[0017] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:
[0018] The wireless charging device provided by the embodiment of the present disclosure includes a housing and a circuit board, a coil and a heat conduction module arranged inside the housing. The circuit board is provided with a heat conduction hole; the coil is arranged on one side of the circuit board and is electrically connected to the circuit board; the heat conduction module is fixed in the heat conduction hole and is in contact with the coil. The embodiment of the present disclosure can effectively dissipate heat from the coil and the circuit board through the heat conduction module, thereby improving the heat dissipation performance of the wireless charging device, and further enabling the wireless charging device to maintain a higher charging power in the charging state.
[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic structural diagram of a wireless charging device in an embodiment of the present disclosure is shown.
[0021] Figure 2 A schematic structural diagram of a circuit board in an embodiment of the present disclosure is shown.
[0022] Reference numerals:
[0023] 110 - housing; 120 - circuit board; 121 - heat conducting hole; 130 - coil; 140 - heat conducting module; 141 - heat conducting sheet; 142 - heat conducting grid; 150 - power supply module; 160 - cooling fan; 170 - magnetic ring; 210 - voltage conversion circuit; 220 - control circuit; 230 - full bridge circuit. DETAILED DESCRIPTION
[0024] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0025] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0026] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.
[0027] Wireless charging is a charging method that does not require the use of traditional charging cables to connect devices and power sources. Among them, the coil is one of the key components used to achieve energy transmission in wireless charging devices. Wireless charging systems usually consist of two coils: a transmitting coil (deployed in the wireless charging device) and a receiving coil (deployed in the electronic device to be charged). When the receiving coil is close to and aligned with the transmitting coil, the alternating magnetic field generated by the transmitting coil induces a current in the receiving coil. After rectification and regulation, this current can power electronic devices.
[0028] However, when the coil in the wireless charging device is overheated, the excessively high temperature will generate additional power loss, thereby reducing the efficiency of wireless charging and slowing down the charging speed. In addition, the excessively high temperature may damage the coil or overheat the electronic equipment in contact with the coil, causing certain safety hazards.
[0029] Similarly, when the temperature of the circuit board connected to the coil is too high, it may cause damage to the circuit board or cause the components in the circuit board to malfunction.
[0030] In view of this, the wireless charging device provided in the embodiment of the present disclosure includes a housing and a circuit board, a coil and a heat conduction module arranged inside the housing. Among them, a heat conduction hole is provided on the circuit board; the coil is arranged on one side of the circuit board and is electrically connected to the circuit board; the heat conduction module is fixed in the heat conduction hole and contacts the coil. The embodiment of the present disclosure can effectively dissipate heat from the coil and the circuit board through the heat conduction module, thereby improving the heat dissipation performance of the wireless charging device, and further enabling the wireless charging device to maintain a higher charging power in the charging state.
[0031] Next, exemplary embodiments of the present disclosure will be described in detail.
[0032] Figure 1 A schematic diagram of the structure of a wireless charging device in an embodiment of the present disclosure is shown. Figure 1 As shown, the wireless charging device includes a housing 110, a circuit board 120, a coil 130 and a heat conduction module 140. The circuit board 120, the coil 130 and the heat conduction module 140 are all arranged inside the housing 110. The circuit board 120 is provided with a heat conduction hole 121; the coil 130 can be arranged on one side of the circuit board 120 and is electrically connected to the circuit board 120; the heat conduction module 140 is fixed in the heat conduction hole 121 and is in contact with the coil 130.
[0033] Exemplarily, the heat-conducting hole 121 may be a through hole opened on the circuit board 120. Exemplarily, the heat-conducting hole 121 may be opened at the center of the circuit board 120 so that the heat-conducting module 140 arranged therein can transfer heat in all directions within the circuit board 120. The heat-conducting hole 121 may also be opened near components on the circuit board 120 where heat is concentrated, thereby improving the heat-conducting capacity of the heat-conducting module 140 for these components.
[0034] The coil 130 can generate a magnetic field when powered on, thereby charging an electronic device that supports wireless charging. By contacting the coil 130 with the heat-conducting module 140 , the heat-conducting module 140 can conduct heat from the coil 130 , thereby reducing the temperature of the coil 130 .
[0035] Therefore, the heat conductive module 140 can transfer the heat in the coil 130 and the circuit board 120 at the same time, thereby improving the heat dissipation capacity of the coil 130 and the circuit board 120, so that the wireless charging device provided by the embodiment of the present disclosure can maintain a higher charging speed and improve the service life.
[0036] It is understandable that, since the distance between the electronic device and the coil 130 usually determines the charging efficiency when the electronic device is in a wireless charging state, the closer the distance between the electronic device and the coil 130, the higher the charging efficiency. Therefore, in order to obtain a higher charging efficiency, the distance between the electronic device and the coil 130 is usually closer, and accordingly, the distance between the heat conductive module 140 directly in contact with the coil 130 and the electronic device is also closer, so the heat conductive module 140 can also export the heat of the electronic device being charged to a certain extent, thereby reducing the temperature of the electronic device during the charging process.
[0037] In some embodiments, the heat conducting module 140 includes a heat conducting sheet 141 and a heat conducting grid 142. The heat conducting sheet 141 can be embedded in the heat conducting hole 121 and contact the coil 130 to transfer the heat in the coil 130 and the circuit board 120. The heat conducting grid 142 is fixed to the side of the heat conducting sheet 141 away from the coil 130 to dissipate the heat transferred by the heat conducting sheet 141 to the outside.
[0038] Exemplarily, the heat conductive sheet 141 may be a semiconductor cooling sheet (Thermoelectric Cooler, TEC).
[0039] The semiconductor refrigeration sheet is small in size and has a certain active heat conduction capability. Specifically, the semiconductor refrigeration sheet can be composed of N-type and P-type semiconductors plus connecting electrodes. Under the action of an external electric field, heat can be brought from one end of the semiconductor refrigeration sheet to the other end, so that the semiconductor refrigeration sheet produces a cold end and a hot end. Among them, the cold end is used to absorb heat, and the hot end is used to dissipate heat. Therefore, the cold end of the semiconductor refrigeration sheet can be in contact with the coil 130, and the hot end can be fixedly connected to the heat conductive grid 142, so that heat flows from one side of the coil 130 to the heat conductive grid 142.
[0040] For example, for the connection surface between the heat conductive grid 142 and the heat conductive sheet 141, the area of the heat conductive grid 142 on this surface can be larger than the area of the heat conductive sheet 141 on this surface, so that the heat conductive grid 142 can fully dissipate the heat transferred by the heat conductive sheet 141, thereby reducing the heat accumulation generated in the charging device. In this case, the heat conductive grid 142 can also partially contact the side of the circuit board 120 away from the coil 130, so that the heat conductive grid 142 can also directly conduct and dissipate the heat generated by the circuit board 120 during operation.
[0041] In some embodiments, the wireless charging device further includes a power supply module 150, which can be disposed inside the housing 110. Specifically, the power supply module 150 can be disposed on a side of the circuit board 120 away from the coil 130 to avoid affecting the contact distance between the coil 130 and the electronic device in the charging state. In addition, there is a gap between the power supply module 150 and the thermal conductive grid 142, thereby preventing the thermal conductive grid 142 from directly dissipating heat to the power supply module 150, affecting the operation of the power supply module 150, and at the same time increasing the heat dissipation space of the thermal conductive grid 142.
[0042] Exemplarily, the power supply module 150 may be a battery or a DC power supply, which is not limited in the embodiments of the present disclosure.
[0043] In some embodiments, the wireless charging device further includes a cooling fan 160, which can be disposed inside the housing 110. The power supply module 150 and the circuit board 120 can form a cooling air duct inside the housing 110, and the cooling fan 160 is used to send air into the cooling air duct, thereby promoting heat dissipation of the power supply module 150 and the circuit board 120.
[0044] For example, since the position of the thermal grid 142 in the shell 110 is actually between the power supply module 150 and the circuit board 120, the cooling fan 160 can be set on the side of the thermal grid 142 so that the cooling fan 160 can directly supply air to the thermal grid 142, thereby promoting the heat dissipation efficiency of the thermal grid 142 and further reducing the temperature of the coil 130 and the circuit board 120.
[0045] It is understandable that the number of the heat dissipation fan 160 can be one or more. In the case where the number of the heat dissipation fans 160 is more than one, the multiple heat dissipation fans 160 can be arranged on the same side of the heat conductive grid 142, or on both sides of the heat conductive grid 142, which is not limited in the embodiment of the present disclosure. It is understandable that no matter how the multiple fans are arranged, the air supply directions of the multiple fans should be the same, so as to avoid interference between the multiple fans.
[0046] In some embodiments, an air inlet (not shown in the figure) and an air outlet (not shown in the figure) are further provided on the housing 110. The air inlet and the air outlet are relatively arranged on both sides of the heat dissipation duct, so that the hot air in the heat dissipation duct can be discharged to avoid heat accumulation in the wireless charging device.
[0047] In some embodiments, the wireless charging device further includes a magnetic ring 170. The magnetic ring 170 is annular and can be disposed inside the housing 110 and fixed on the housing 110 on the side of the coil 130 away from the circuit board 120. Through the arrangement of the magnetic ring 170, the electronic device can be magnetically connected to the wireless charging device during the wireless charging process, thereby preventing the electronic device from falling or being misaligned with the wireless charging device during the charging process.
[0048] Exemplarily, the magnetic ring 170 can be arranged at the periphery of the coil 130, the inner ring of the magnetic ring 170 surrounds the coil 130, and there is a gap between the inner ring of the magnetic ring 170 and the coil 130. Thus, it is possible to avoid the arrangement of the magnetic ring 170 affecting the direct contact between the coil 130 and the housing 110, and ensure that the distance between the coil 130 and the electronic device is the shortest in the charging state.
[0049] Exemplarily, the magnetic ring 170 may be disposed concentrically with the coil 130 , so that the electronic device to be charged can be aligned with the position of the coil 130 , thereby improving the efficiency of wireless charging.
[0050] Figure 2 FIG. 2 is a schematic diagram showing the structure of a circuit board in an embodiment of the present disclosure. Figure 2 As shown, the circuit board may include a voltage conversion circuit 210, a control circuit 220 and a full-bridge circuit 230 which are electrically connected in sequence. The voltage conversion circuit 210 is electrically connected to the power supply module 150, and the full-bridge circuit 230 is electrically connected to the coil 130.
[0051] When the wireless charging device is used to charge an electronic device, the power supply module 150 can be boosted through the voltage conversion circuit 210, and then inverted in the full-bridge circuit 230 through the control circuit 220, so as to invert the DC power output by the power supply module 150 into AC power, and finally send the energy outward through the resonance of the coil 130. Correspondingly, the receiving end coil 130 in the electronic device can receive the energy sent outward by the wireless charging device through the principle of electromagnetic induction, so as to perform wireless charging.
[0052] Exemplarily, when the power supply module 150 is a battery, the wireless charging device can also use the coil 130 to reversely charge the battery inside the wireless charging device. In this case, the coil 130 inside the wireless charging device can receive external resonant energy to generate current, and rectify it through the full-bridge circuit 230 to invert the AC power into DC power, which is then stepped down in the voltage conversion circuit 210 by the control circuit 220 and stored in the battery.
[0053] The embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0055] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A wireless charging device, characterized in that: include: A housing and a circuit board, a coil and a heat conduction module arranged inside the housing; Wherein, the circuit board is provided with a heat conduction hole; the coil is arranged on one side of the circuit board and is electrically connected to the circuit board; the heat conduction module is fixed in the heat conduction hole and is in contact with the coil.
2. The wireless charging device according to claim 1, characterized in that: The heat-conducting module comprises a heat-conducting sheet and a heat-conducting grid. The heat-conducting sheet is embedded in the heat-conducting hole, and the heat-conducting grid is fixed on a side of the heat-conducting sheet away from the coil.
3. The wireless charging device according to claim 2, characterized in that: The heat conducting sheet is a semiconductor refrigeration sheet, and the semiconductor refrigeration sheet comprises a cold end and a hot end, wherein the cold end is in contact with the coil, and the hot end is fixedly connected to the heat conducting grid.
4. The wireless charging device according to claim 2, characterized in that: The wireless charging device further comprises a power supply module; the power supply module is arranged on a side of the circuit board away from the coil and has a gap between the power supply module and the heat conductive grid.
5. The wireless charging device according to claim 4, characterized in that: The wireless charging device further includes a cooling fan, the power supply module and the circuit board form a cooling air duct, and the cooling fan is used to send air into the cooling air duct.
6. The wireless charging device according to claim 5, characterized in that: The heat dissipation fan is arranged on the side of the heat conducting grid.
7. The wireless charging device according to claim 5, characterized in that: The shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are arranged on two sides of the heat dissipation duct opposite to each other.
8. The wireless charging device according to claim 1, characterized in that: The wireless charging device further comprises a magnetic ring, and the magnetic ring is fixed on the housing on a side of the coil away from the circuit board.
9. The wireless charging device according to claim 8, characterized in that: The magnetic ring is arranged concentrically with the coil.
10. The wireless charging device according to claim 4, characterized in that: The circuit board includes a voltage conversion circuit, a control circuit and a full-bridge circuit which are electrically connected in sequence; Wherein, the voltage conversion circuit is electrically connected to the power supply module, and the full-bridge circuit is electrically connected to the coil.