WO2024055903A1

WO2024055903A1 - Wireless charger

Info

Publication number: WO2024055903A1
Application number: PCT/CN2023/117572
Authority: WO
Inventors: 张太志; 戴通; 王旭光
Original assignee: 惠州市华阳多媒体电子有限公司
Priority date: 2022-09-13
Filing date: 2023-09-07
Publication date: 2024-03-21
Also published as: CN218216822U

Abstract

The present application relates to a wireless charger, comprising a movable part, a fixed portion, and a drive module. The movable part comprises a first charging coil and an induction module used for inducing a second charging coil of a device to be charged. The fixed part comprises a housing used for accommodating the movable part and a guide assembly fixed into the housing. The housing comprises a support panel used for supporting the device to be charged. The movable part can be guided by the guide assembly to move in the housing in the direction parallel to the support panel. The drive module is used for driving the movable part to move according to output information of the induction module. The second charging coil of the device to be charged is detected by the induction module arranged in the housing, so that the movable part can be driven by the drive module to move to a preset position, and then the first charging coil and the second charging coil are opposite to achieve the optimal charging efficiency, and the function of efficient charging can be achieved no matter what type of device to be charged is placed on the wireless charger.

Description

Wireless charger

Technical field

The present application relates to chargers, and specifically to a wireless charger.

Background technique

With the progress of society and the development of technology, mobile phones have more and more functions, such as calls, cameras, games, flashlights, mirrors, wireless payments (electronic wallets), electronic card holders, NFC, remote control, AI assistants, etc. Therefore, mobile phones have basically become a necessity in people's lives. In order to facilitate portability, mobile phones are generally smaller in size, which requires the battery to have excellent battery life and to be convenient and fast for charging. Traditional wired charging technology requires the charging line to be connected to the mobile phone, which has the disadvantages of messy lines in the charging place, cumbersome charging operations, and inconvenience. Therefore, wireless charging has become more and more popular. The current wireless charging solution requires the user to place the mobile phone on the wireless charger and align the charging coil of the mobile phone with the charging coil of the wireless charger to achieve efficient charging. When using a wireless charger to charge different models of mobile phones, it is easy for the two charging coils to be misaligned, which affects the charging efficiency.

Contents of the invention

In view of this, the purpose of this application is to provide a wireless charger that can achieve efficient charging no matter what type of mobile phone is placed on it.

A wireless charger includes a movable part, a fixed part and a driving module. Wherein, the movable part includes a first charging coil and an induction module used to sense a second charging coil of the device to be charged. The fixed part includes a housing for accommodating the movable part and a guide assembly fixed in the housing. The housing includes a support panel for supporting the device to be charged. The movable part can move within the housing in a direction parallel to the support panel under the guidance of the guide assembly. The driving module is used to drive the movable part to move according to the output information of the sensing module.

The second charging coil of the device to be charged is detected by the induction module provided in the housing, so that the movable part can be driven by the driving module to move to the preset position, so that the first charging coil and the second charging coil are opposite to achieve the best Charging efficiency enables efficient charging no matter what type of mobile phone is placed above it.

Optionally, in a possible implementation, the movable part further includes a support plate and a magnetic plate disposed above the support plate. Wherein, the first charging coil is arranged on the upper side of the magnetic plate, and the induction module is arranged on the upper side of the first charging coil. The magnetic plate is mainly used to shield the magnetic field generated by the induction module and the first charging coil to avoid affecting the work of the electronic components below the movable part.

Optionally, in a possible implementation, the induction module includes a printed circuit board and a plurality of induction coils formed on the printed circuit board. The position of the second charging coil of the device to be charged can be detected through the magnitude of the induced voltage generated by the multiple induction coils, thereby quickly locating the second charging coil.

Optionally, in a possible implementation, interconnected through holes are formed in the middle of the first charging coil, the magnetic plate and the support plate. The through hole can increase the heat dissipation performance of the movable part. When the heat dissipation module is configured, the existence of the through hole increases the air flow efficiency inside the wireless charging device, improves the heat dissipation efficiency, and thereby improves the charging efficiency.

Optionally, in a possible implementation, both sides of the support plate are formed with claws extending toward the inner wall or bottom surface of the housing, and a rack is fixed on the back thereof. Convenient to be removably connected to the fixed part.

Optionally, in a possible implementation, the guide assembly includes two parallel guide rods fixed in the housing, and the claws are slidably engaged with the guide rods. The buckle connection between the claw and the guide rod allows the movable part to move along the guide rod relative to the fixed part, with small resistance and low sound during movement.

Optionally, in a possible implementation, the drive module includes a motor, a worm connected to the motor, and a gear meshed with the worm. Wherein, the gear meshes with the rack, thereby connecting the driving module with the movable part, so that the driving part can drive the movable part to move to a preset position. The transmission structure of the motor, worm, gear and rack can make the moving distance of the movable part more precise and controllable, increasing control accuracy.

Optionally, in a possible implementation, the drive module further includes a motor bracket, and the motor bracket includes a bottom plate for fixing the gear and a wall extending substantially vertically from the bottom plate, so The motor and the worm are arranged on both sides of the wall, and the shaft of the motor passes through the hole in the wall and is connected to the worm, which facilitates the fixation, installation and replacement of the motor.

Optionally, in a possible implementation, the gear is a double gear, the lower wheel of the double gear has a larger diameter and meshes with the worm, and the upper wheel of the double gear meshes with the worm. The above-mentioned rack meshing increases the driving efficiency. At the same time, when the wireless charger is applied to a vehicle, the impact of vehicle vibration on the motor can be greatly reduced.

Optionally, in a possible implementation, the driving module includes a motor, a transmission device connected between the motor and the movable part, and a transmission device fixedly connected to the fixed part and located below the movable part. Control circuit board. The control circuit board is electrically connected to the movable part through a flexible circuit and is electrically connected to the motor. This structure places most of the functions of the system's circuit structure on the fixed part, reducing the weight of the movable part and enabling more complex functions.

Optionally, in a possible implementation, the wireless charger also includes a heat dissipation module arranged on the rear side of the drive module to discharge the heat generated during charging out of the wireless charger in a timely manner, which is conducive to rapid heat dissipation of the system. Improve charging efficiency.

Optionally, in a possible implementation, the heat dissipation module includes a fan and a fan casing, the casing includes a lower shell, a vent is formed on the lower shell, and the fan shell is installed on the back of the lower shell; The fan is installed in the fan casing, and its air inlet is opposite to the vent, so that the heat inside the casing can be discharged in time, and it is also convenient to clean and replace the fan.

Optionally, in a possible implementation, the movable part further includes a pressure sensor, which is fixed on the sensing module. The upper surface of the induction module is in contact with the back of the support panel. In this way, when the device to be charged is placed on the support panel, the pressure sensor on the sensing module can detect it. In addition, when it is detected that the movable part is pressed by a strong external force, it can stop moving the movable part to prevent external force from damaging the device, but at this time the wireless charger can still charge the device to be charged.

The solution of this application detects the position of the second charging coil of the device to be charged through an induction module provided in the housing, so that the movable part can be driven by the driving module to move below the second charging coil, so that the first charging coil and the second charging coil Directly opposite to each other, in order to achieve the best charging efficiency, no matter what type of device to be charged is placed above, it can achieve efficient charging. There is no need to manually align the coil, which improves the user experience. The wireless charger of this application can be used in various charging scenarios, such as at home, vehicles and other mobile transportation vehicles.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the drawings required to be used in the embodiments will be briefly introduced below.

Figure 1 is a schematic diagram of the application of a wireless charger in an embodiment of the present application.

FIG. 2 is a perspective view of the wireless charger after the support panel is removed according to an embodiment of the present application.

FIG. 3 is an exploded view of a wireless charger according to an embodiment of the present application.

FIG. 4 is an exploded view of the movable part of the wireless charger in an embodiment of the present application.

FIG. 5 is a perspective view of the support plate of the movable part of the wireless charger in an embodiment of the present application.

FIG. 6 is a perspective view of the heat dissipation module of the wireless charger in an embodiment of the present application.

FIG. 7 is a perspective view of a driving module of a wireless charger in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments These are part of the embodiments of this application, but not all of them. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the accompanying drawings. The orientation or positional relationship shown is either the orientation or positional relationship in which the product of this application is usually placed when used, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the present application.

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other.

The technical solutions in this application will be described below with reference to the accompanying drawings.

Please refer to FIGS. 1 to 7 . This application provides a wireless charger 1 with a movable first charging coil 11 (transmitting coil) inside, which is used to charge the device 2 to be charged. The device 2 to be charged may be a mobile phone, a portable tablet computer or other portable electronic device, which has a second charging coil 3 (receiving coil). When the distance between the first charging coil 11 and the second charging coil 3 is within the preset range, the wireless charger 1 can charge the device 2 to be charged through the first charging coil 11 and the second charging coil 3 .

The wireless charger 1 mainly includes a movable part 10 , a fixed part 20 and a driving module 30 for driving the movable part 10 to move relative to the fixed part 20 . Among them, the movable part 10 mainly includes a first charging coil 11 and an induction module 12 for sensing the second charging coil 3 of the device 2 to be charged. The fixed part 20 mainly includes a housing 21 for accommodating the movable part 10 and a guide assembly 22 fixed in the housing 21 . The housing 21 includes a support panel 211 and a lower shell 212 for supporting the device 2 to be charged. The support panel 211 can be made of PC+ABS alloy plastic (PC is the abbreviation of polycarbonate, ABS is the abbreviation of acrylic-butadiene-styrene copolymer) or PC+TPE alloy material (TPE is thermoplastic elastomer). The lower shell 212 is made of non-conductive plastic material. The support panel 211 is fixed on the upper end of the lower shell 212 , and the two define a receiving space for accommodating the movable part 10 and the driving module 30 . The movable part 10 is movably connected to the guide assembly 22 and can move in the housing 21 in a direction parallel to the support panel 211 under the guidance of the guide assembly 22 . The driving module 30 is used to drive the movable part 10 to move directly below the second charging coil 3 of the device to be charged 2 according to the output information of the induction module 12 to ensure that the charging efficiency reaches the optimal state. Therefore, any model and size of equipment to be charged can be efficiently charged, which has the advantages of high efficiency, energy saving, and convenience.

More specifically, the first charging coil 11 is an annular air-core coil, preferably in the shape of a plate. It can be a coil that is wound and then welded to a circuit board, or it can be formed on a hard or flexible circuit using a circuit board molding process. The laminated coils in the board, such as fine pitch coils, have a higher overall integration level and simplify the assembly process. The first charging coil 11 is pasted on the back of the induction module 12 .

The induction module 12 includes a generally rectangular printed circuit board 121 and a plurality of induction coils 122 formed on the printed circuit board 121 . The induction coil 122 can be a coil that is wound and then welded to the printed circuit board 121, or it can be a laminated coil formed in the printed circuit board 121 using a circuit board molding process, such as a fine pitch coil. In this embodiment, three induction coils 122 are provided sequentially along the moving direction of the movable part 10 . In this way, when the device 2 to be charged is placed on the casing 21, the magnetic field generated by the second charging coil 3 will be induced by the multiple induction coils 122, and different induced voltages will be generated accordingly. In this way, it can be determined according to the magnitude of the induced voltage. The position of the second charging coil 3 of the device 2 to be charged, so as to quickly locate the second charging coil 3.

The movable part 10 also includes a support plate 13 and a magnetic plate 14 provided on the upper side of the support plate 13 . The support plate 13 is made of non-conductive material, such as plastic, and can be generally plate-shaped. Claws 131 extending toward the inner wall of the lower shell 212 are formed on both sides of the support plate 13 , and a rack 132 is fixed on the back of the support plate 13 . The rack 132 may be supported by a metal material, and its extending direction is parallel to both sides of the support plate 13 . The magnetic plate 14 is disposed between the support plate 13 and the first charging coil 11 to shield the magnetic field generated by the induction module 12 and the first charging coil 11 to avoid affecting the work of electronic components such as the drive module 30 below the movable part 10 . The magnetic plate 14 may be a magnetic piece made of manganese-zinc ferrite. The induction module 12 can be fixed on the support plate 13 through fasteners such as screws, thereby clamping and fixing the first charging coil 11 and the magnetic plate 14 .

In addition, a pressure sensor 123 is provided on the back of the sensing module 12 for detecting the pressure exerted on the sensing module 12 . The pressure sensor 123 can be an inductive pressure sensor, such as a solenoid inductive pressure sensor. Its coil is fixed on the back of the induction module 12 and protrudes toward the bottom of the housing 21 , and its iron core can be fixed on the support plate 13 . In this way, when the sensing module 12 is under pressure, the coil of the pressure sensor 123 moves toward its iron core and thus has different inductance values. The change in the inductance value can be determined through a resistor connected in parallel with the coil, thereby determining the magnitude of the pressure. In particular, the upper surface of the sensing module 12 is in contact with the back of the support panel 211, so that the pressure on the support panel 211 can be detected. Therefore, when the device 2 to be charged is placed on the wireless charging device, the induction module 12 can detect it through the pressure sensor 123, thereby triggering the process of detecting the position of the second charging coil and charging. In addition, when the system detects that the movable part 10 of the wireless charger 1 is pressed by a strong external force, it can stop moving the movable part 10 to prevent external force from damaging the wireless charger, but at this time the wireless charger can still charge the device to be charged. In order to reduce the noise caused by friction between the movable part 10 and the support panel 211 when it moves, lubricating oil can be applied to the upper surface of the sensing module 12 and the back of the support panel 211 .

The pressure sensor 123 is fixed at the center of the back of the sensing module 12 , and the pressure sensor 123 can be exposed through the hole in the middle of the first charging coil 11 . In addition, a corresponding through hole 141 is also formed in the middle of the magnetic plate 14 to expose the pressure sensor 123 . A through hole 133 is also formed in the middle of the support plate 13 , and the iron core of the pressure sensor 123 is fixed in the through hole 133 . The through holes 141 and 133 on the first charging coil 11, the magnetic plate 14 and the support plate 13 are interconnected, which can also increase the heat dissipation performance of the movable part.

The guide assembly 22 is two parallel guide rods (also numbered 22 ) fixed in the housing 21 , and the claws 131 of the movable part 10 are slidably engaged with the guide rods 22 . Utilizing the snap connection between the claw 131 and the guide rod 22, the movable part 10 is allowed to move along the guide rod 22 relative to the fixed part 20, with little resistance and low sound during movement. In this embodiment, four fixing posts 213 integrally extend upward from the bottom of the lower shell 212 . Both ends of the guide rod 22 are fixedly connected to the ends of the two fixing posts 213 respectively. The guide rod 22 is parallel to both sides of the housing 21 and parallel to the support panel 211 of the housing 21 .

The driving module 30 mainly includes a motor 31 , a transmission device 32 connected between the motor 31 and the movable part 10 , and a control circuit board 33 fixedly connected to the fixed part 20 and located below the movable part 10 . Among them, the motor 31 can be a stepper motor, which can achieve precise drive control. The transmission device 32 is used to convert the rotational energy output by the motor 31 into linear motion of the movable part 10 , and may include a combination of a belt and a gear, or a combination of a worm and a gear. In this embodiment, the transmission device 32 includes a worm 321 connected to the motor 31 and a gear 322 meshed with the worm 321 . The gear 322 meshes with the rack 132 of the movable part 10 , thereby connecting the driving module 30 and the movable part 10 . The gear 322 can be a double gear. The lower wheel of the double gear has a larger diameter and meshes with the worm 321, and the upper wheel meshes with the rack 132, thereby increasing the driving efficiency. At the same time, when the wireless charger is applied to a vehicle, the impact of vehicle vibration on the motor can be greatly reduced.

The motor 31 is fixed on the bottom of the housing 21 through the motor bracket 35 . The motor bracket 35 includes a bottom plate 351 for fixing the gear 322 and a wall 352 extending substantially vertically from the bottom plate 351 . The motor 31 and the worm 321 are arranged on both sides of the wall 352. The shaft of the motor 31 passes through the hole in the wall 352 and is connected to the worm 321, which facilitates the fixation, installation and replacement of the motor 31.

The control circuit board 33 can be fixed on the column extending integrally from the bottom of the housing 21 so as not to contact the bottom of the housing 21 and leaving a channel for air circulation. The control circuit board 33 is electrically connected to the movable part 10 and the motor 31 and is used to control the movable part 10 and the motor 31 . This structure places most of the functions of the system's circuit structure on the fixed part, reducing the weight of the movable part and enabling more complex functions.

More specifically, the control circuit board 33 can be electrically connected to the sensing module 12 through the flexible circuit 34 for powering the sensing module 12 and receiving sensing data and pressure detection data from the sensing module 12 . Interfaces can be provided at both ends of the flexible circuit 34, and can be detachably connected to the interfaces on the back of the control circuit board 33 and the sensing module 12 respectively to facilitate assembly and maintenance. The control circuit board 33 can also be electrically connected to the first charging coil 11 through wires or flexible lines for supplying power to the first charging coil 11 to achieve wireless charging. The control circuit board 33 is also electrically connected to the motor 31 to control the operation of the motor 31 and move the movable part 10 to a preset position. The control circuit board 33 is also connected to an external power connector for obtaining electrical energy from an external power source, such as a vehicle battery or a mains network. It can be understood that a power supply circuit, a filter circuit, a control circuit, etc. can be provided on the control circuit board 33 to realize the above functions.

Since a lot of heat is generated during the wireless charging process, when the internal temperature of the wireless charger 1 gradually increases, the charging efficiency will be reduced, and safety hazards such as combustion will also occur. Therefore, in this embodiment, the wireless charger 1 also includes a heat dissipation module 40 arranged on the back or side of the drive module 30 to discharge the heat generated during charging out of the wireless charger 1 in a timely manner, which is conducive to rapid heat dissipation of the system and improves charging efficiency. .

In this embodiment, the heat dissipation module 40 is fixed on the back of the housing 21 , and a vent 214 is provided at the bottom of the corresponding lower housing 212 . The heat dissipation module 40 includes a fan 41 and a fan housing 42 installed on the back of the lower case 212 . The fan 41 is located between the air inlet 421 and the vent 214 of the fan housing 42 , and its power cord is electrically connected to the control circuit board 33 . This structure minimizes the size of the wireless charger and can discharge the heat inside the casing in a timely manner. It also facilitates cleaning and replacement of the fan. It can be understood that in other embodiments, the heat dissipation module 40 can be disposed on the side of the housing 21 .

During operation, the control circuit board 33 continuously supplies power to the induction module 12. When the induction module 12 detects that the device 2 to be charged is placed on the housing 21 through the pressure sensor 123, it first detects that the second charging coil 3 of the device 2 to be charged is charging. the previous initial position. Specifically, the induction coil 122 on the induction module 12 and the circuit on the control circuit board 22 can form an echo detection circuit (for example, a 1MHz echo detection circuit) to detect the electromagnetic energy emitted by the second charging coil 3, and detect the The echo of the second charging coil 3 locates the initial position of the second charging coil of the device 2 to be charged before charging. At this time, the control circuit board 33 will detect the voltage balance state at both ends of the multiple induction coils 122. If the voltage balance state is not within the calibration range, it is determined that the movable part 10 needs to be moved. Otherwise, it means that the second charging coil 3 has been connected to the first charging coil. Coil 11 is facing directly. At this time, power is supplied to the first charging coil 11 to charge the device 2 to be charged. At the same time, the motor 31 of the drive module 30 is controlled to operate (forward rotation or reverse rotation), driving the movable part 10 to move toward the side with higher voltage among the multiple induction coils 122 . During this process, the control circuit board 22 will position the relative positions of the first charging coil 11 and the second charging coil 3 in real time according to the output data of the induction module 12 until the voltages at both ends of the multiple induction coils 122 reach a calibrated equilibrium state (multiple If the voltage difference between the two ends of each induction module 12 is within a preset range, such as 0.05 volts), the motor 31 is controlled to stop rotating and the echo detection circuit is turned off.

When it is detected that the device 2 to be charged is removed, the power supply path of the first charging coil 11 is disconnected. During the operation of the first charging coil 11, the control circuit board 33 can control the operation of the fan 41 to ensure that the operating temperature is within an appropriate range. After charging is completed, the fan 41 can continue to work for a period of time, such as half a minute, to fully protect the wireless charging device and always keep it at a suitable temperature.

When it is detected that the movable part 10/support panel 211 is subjected to a pressure exceeding a preset value, the motor is controlled to stop working to prevent damage to the device, but the device to be charged can continue to be charged.

In other embodiments, the support plate can be omitted, and the claws and racks can be arranged on the magnetic plate.

In other embodiments, the through holes in the support plate may be omitted.

In other embodiments, the motor bracket can be omitted and a wall extending upward from the bottom of the lower housing can be used instead of the motor bracket.

In other embodiments, the heat dissipation module may be omitted if desired.

In other embodiments, the pressure sensor may be omitted if desired.

In other embodiments, power can be supplied to the first charging coil after the movement of the movable part is completed, and leaving the first charging coil energized will affect the detection result of the induction coil.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the present application. and variations, the scope of the application is defined by the appended claims and their equivalents.

Claims

A wireless charger is characterized by including:

The movable part (10) includes a first charging coil (11) and an induction module (12) for sensing the second charging coil (3) of the device to be charged (2);

Fixed part (20), which includes:

A housing (21) used to accommodate the movable part (10), which includes a support panel (211) used to support the device (2) to be charged; and

The guide assembly (22) is fixed in the housing (21), and the movable part (10) can be guided by the guide assembly (22) in the housing (21) along a direction parallel to the guide assembly (22). the directional movement of the support panel (211); and

A driving module (30) used to drive the movable part (10) to move according to the output information of the sensing module (12).
The wireless charger according to claim 1, characterized in that the movable part (10) further includes:

support plate (13); and

A magnetic plate (14) provided on the upper side of the support plate (13);

Wherein, the first charging coil (11) is arranged on the upper side of the magnetic plate (14), and the induction module (12) is arranged on the upper side of the first charging coil (11).
The wireless charger according to claim 2, characterized in that the induction module (12) includes a printed circuit board (121) and a plurality of induction coils (122) formed on the printed circuit board (121).
The wireless charger according to claim 2, characterized in that interconnected through holes (141, 133) are formed in the middle of the first charging coil (11), the magnetic plate (14) and the support plate (13). ).
The wireless charger according to claim 2, wherein the two sides of the support plate (13) are formed with claws (131) extending toward the inner wall or bottom surface of the housing (21), A rack (132) is fixed on its back.
The wireless charger according to claim 5, characterized in that the guide assembly (22) includes two parallel guide rods (22) fixed in the housing (21), and the claw (131) It is slidably engaged with the guide rod (22).
The wireless charger according to claim 5, characterized in that the driving module (30) includes:

motor(31);

a worm (321) connected to the motor (31); and

Gear (322) meshing with worm (321);

Wherein, the gear (322) meshes with the rack (132).
The wireless charger according to claim 7, characterized in that the driving module (30) further includes a motor bracket (35), and the motor bracket (35) includes a gear for fixing the gear (322). The bottom plate (351) and the wall (352) extending substantially vertically from the bottom plate (351), the motor (31) and the worm (321) are arranged on both sides of the wall (352), the motor (31) The shaft passes through the hole in the wall (352) and is connected with the worm (321).
The wireless charger according to claim 8, characterized in that the gear (322) is a double gear, the lower wheel of the double gear has a larger diameter and meshes with the worm (321), and the The upper wheel of the double gear meshes with the rack (132).
The wireless charger according to claim 1, characterized in that the driving module (30) includes:

motor(31);

a transmission device (32) connected between the motor (31) and the movable part (10); and

A control circuit board (33) fixedly connected to the fixed part (20) and located below the movable part (10) is electrically connected to the movable part (10) through a flexible circuit (34), and Electrically connected to the motor (31).
The wireless charger according to claim 1, further comprising a heat dissipation module (40) arranged at the rear side of the driving module (30).
The wireless charger according to claim 11, characterized in that the heat dissipation module (40) includes a fan (41) and a fan housing (42), the housing (21) includes a lower shell (212), and the lower shell A vent (214) is formed on (212), and the fan housing (42) is installed on the back of the lower housing (212); the fan (41) is installed in the fan housing (42), and its air inlet (421) is connected to the lower housing (212). The vents (214) are opposite.
The wireless charger according to claim 12, characterized in that the movable part (10) further includes:

support plate (13); and

A magnetic plate (14) provided on the upper side of the support plate (13);

Wherein, the first charging coil (11) is arranged on the upper side of the magnetic plate (14), and the induction module (12) is arranged on the upper side of the first charging coil (11).
The wireless charger according to claim 13, characterized in that interconnected through holes (141, 133) are formed in the middle of the first charging coil (11), the magnetic plate (14) and the support plate (13). ).
The wireless charger according to claim 2, characterized in that the movable part (10) further includes a pressure sensor (123) fixed on the induction module (12); The surface is attached to the back of the support panel (211).