Wireless charger and wireless charging method

Abstract

The invention discloses a wireless charger and a wireless charging method. The wireless charger comprises a shell, a charging coil, a driving assembly and a temperature sensor. The temperature sensor can detect the temperature of the to-be-charged device, and when the temperature sensor detects that the temperature of the to-be-charged device in the charging process is higher than the first preset temperature, the charging power of the charging coil is reduced to protect the to-be-charged device, so that the temperature of the to-be-charged device does not continue to rise due to the high charging power. Moreover, the charging coil is driven by the driving assembly to move relative to the to-be-charged device, so that the overlapping area of the charging coil and the power receiving coil of the to-be-charged device is reduced, and the charging power of the driving assembly is reduced. On one hand, power adjustment is more stable, and it is not likely to cause failure of adjusting output power in a pure electric control mode due to overheating of a charging circuit of the wireless charger; and on the other hand, the power adjustment is finer, and the output power can be finely adjusted by adjusting the position of the charging coil.

Description

Technical Field

[0001] This invention relates to the field of wireless charging, and in particular to a wireless charger and a wireless charging method. Background Technology

[0002] Wireless chargers include a charging coil for generating a changing magnetic field. The receiving coil of the device being charged receives the changing magnetic field and generates an induced current, thus enabling wireless charging of the device. In related technologies, when a wireless charger is charging a device, the device may experience abnormal heating. If the charger continues to charge the device at high power despite this abnormal heating, it may damage the device. Summary of the Invention

[0003] The main objective of this invention is to provide a wireless charger and a wireless charging method that can charge the device being charged more safely.

[0004] To achieve the above objectives, the present invention provides a wireless charger, comprising:

[0005] The housing includes a support portion adapted to support the device to be charged;

[0006] A charging coil is disposed inside the housing, and the charging coil is adapted to wirelessly charge the device to be charged.

[0007] A drive assembly is disposed within the housing and connected to the charging coil, the drive assembly being used to drive the charging coil to move;

[0008] A temperature sensor, suitable for monitoring the temperature of the device to be charged;

[0009] The driving component is configured to drive the charging coil to move relative to the device being charged during the charging process of the charging coil charging the device to be charged, when the temperature sensor monitors that the temperature of the device to be charged is greater than or equal to a first preset temperature, so as to reduce the output power of the charging coil.

[0010] In some embodiments, the driving component is configured to drive the charging coil to perform linear reciprocating motion along a first direction;

[0011] The first direction is perpendicular to the direction from the support portion to the device to be charged; or, the first direction is parallel to the direction from the support portion to the device to be charged.

[0012] In some embodiments, the driving component is configured to drive the charging coil to rotate about a first axis;

[0013] The first axis is parallel to the direction from the support portion to the device to be charged; or, the first axis is perpendicular to the direction from the support portion to the device to be charged.

[0014] In some embodiments, the support portion has a recess on the side facing the device to be charged, the bottom of the recess is connected to a receiving cavity in the housing, the temperature sensor is disposed in the recess, and the temperature sensor is configured to fit against the device to be charged when the support portion carries the device to be charged.

[0015] In some embodiments, the carrier includes a light-transmitting panel adapted to carry the device to be charged, and the charging coil is visible through the light-transmitting panel;

[0016] The wireless charger also includes a light-emitting element, which is disposed inside the charging coil.

[0017] In some embodiments, the wireless charger further includes a light shield located on the side of the charging coil facing the light-transmitting panel;

[0018] The driving component is further configured to drive the charging coil to a position blocked by the light shield when the temperature sensor senses that the temperature of the charging coil is greater than or equal to a second preset temperature.

[0019] In some embodiments, the light-shielding plate is located inside the housing and, along the direction from the support portion to the device to be charged, the light-shielding plate is located between the charging coil and the support portion;

[0020] or,

[0021] The supporting part includes the light-shielding plate, which is adapted to support the device to be charged, and the side of the light-shielding plate is connected to the side of the light-transmitting panel.

[0022] In some embodiments, the wireless charger further includes a positioning component connected to the housing, the positioning component being used to position the device to be charged to fix the relative position of the device to be charged and the carrier.

[0023] The positioning component includes a support portion, a first clamping arm, and a second clamping arm. The support portion is adapted to support the device to be charged. The support portion is configured to be displaced downward relative to the support portion by the gravity of the device to be charged, and during the displacement, the first clamping arm and the second clamping arm are driven to move in opposite directions to each other, so that the first clamping arm and the second clamping arm are adapted to jointly clamp the lateral sides of the device to be charged.

[0024] A second aspect of the present invention also provides a wireless charging method for any of the wireless chargers described above, characterized in that the wireless charging method includes the following steps:

[0025] The temperature of the device to be charged is obtained during the charging process.

[0026] When the temperature of the device to be charged is greater than or equal to a first preset temperature, the charging coil is driven to move relative to the device to be charged in order to reduce the charging power of the charging coil.

[0027] In some embodiments, the carrier includes a light-transmitting panel adapted to carry the device to be charged, and the charging coil is visible through the light-transmitting panel; the wireless charger further includes a light-shielding plate located on the side of the charging coil facing the carrier; the wireless charging method further includes:

[0028] Obtain the temperature of the charging coil;

[0029] When the temperature of the charging coil is greater than or equal to the second preset temperature, the charging coil is driven to move to a position where it is blocked by the light shield.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] In the technical solution of this invention, the wireless charger includes a housing, a charging coil, a driving component, and a temperature sensor. The temperature sensor can detect the temperature of the device to be charged. When the temperature sensor detects that the temperature of the device to be charged during the charging process is higher than a first preset temperature, it determines that the device to be charged may be overheating. Therefore, the charging power of the charging coil is reduced to protect the device to be charged, so that the temperature of the device to be charged will not continue to rise due to the high charging power, effectively protecting the device to be charged. Furthermore, unlike purely electronic control methods such as directly disconnecting charging or reducing charging current and charging voltage to reduce charging power, in this invention, the driving component drives the charging coil to move relative to the device to be charged, thereby reducing the overlap area between the charging coil and the receiving coil of the device to be charged, thereby reducing the charging power of the driving component. In this solution, since the charging power is reduced by mechanical drive, on the one hand, the power adjustment is more stable and less likely to fail due to overheating of the wireless charger's charging circuit, which would otherwise cause the output power adjustment method to fail using purely electronic control. On the other hand, the power adjustment is more precise, and the output power can be finely adjusted by adjusting the position of the charging coil. When adjusting the output power using purely electronic control, the actual output power adjustment is affected by temperature, resulting in a large power error. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a perspective view of the wireless charger in the first embodiment of the present invention;

[0034] Figure 2 This is a first cross-sectional view of the wireless charger in the second embodiment of the present invention;

[0035] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0036] Figure 4 This is a second cross-sectional view of the wireless charger in the second embodiment of the present invention;

[0037] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle;

[0038] Figure 6 This is a first explosion diagram of the wireless charger in the second embodiment of the present invention;

[0039] Figure 7 This is a cross-sectional view of the wireless charger after an explosion, according to a second embodiment of the present invention.

[0040] Figure 8 This is a third cross-sectional view of the wireless charger in the second embodiment of the present invention;

[0041] Figure 9 for Figure 8 A magnified view of a portion of point C in the middle;

[0042] Figure 10 This is a cross-sectional view of the wireless charger after an explosion, according to a second embodiment of the present invention.

[0043] Figure 11 This is a three-dimensional schematic diagram of the internal component assembly of the wireless charger in the second embodiment of the present invention;

[0044] Figure 12 This is an exploded view of the internal component assembly of the wireless charger in the second embodiment of the present invention;

[0045] Figure 13 This is a cross-sectional view of the wireless charger after an explosion, according to a third embodiment of the present invention.

[0046] Figure 14 This is a partial schematic diagram of the wireless charger in the fourth embodiment of the present invention;

[0047] Figure 15 Figure 14 A magnified view of a portion of point D in the middle;

[0048] Figure 16 This is a flowchart of the wireless charging method in the first embodiment of the present invention;

[0049] Figure 17 This is a flowchart of the wireless charging method in the second embodiment of the present invention.

[0050] Explanation of icon numbers:

[0051] Wireless charger 10;

[0052] Casing 100;

[0053] Supporting part 110; Light-transmitting panel 111; Recess 112;

[0054] Charging coil 200;

[0055] Driver component 300;

[0056] Drive unit 310; Transmission unit 320; First gear 321; Second gear 322; Screw 323; Support base 324; Support plate 3241; First slider 3242; Second slider 3243; Groove 3244; First wall surface 3245;

[0057] First circuit board 410; second wall surface 411; electronic component 412; second circuit board 420; light-emitting element 430; sensor 440;

[0058] Guide rail 500;

[0059] Positioning component 600;

[0060] Support part 610; magnetic element 611; micro switch 612; abutment protrusion 613; first clamping arm 620; second clamping arm 630;

[0061] Temperature sensor 700;

[0062] Shade 800;

[0063] First direction X;

[0064] Second direction Y;

[0065] The third direction, Z.

[0066] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0067] The technical solutions of the embodiments of the present invention 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 invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0068] Wireless chargers include a charging coil that generates a changing magnetic field. The receiving coil of the device being charged receives this changing magnetic field and generates an induced current, thus enabling wireless charging of the device. In related technologies, wireless chargers sometimes experience overheating of the device being charged during wireless charging. This overheating may be caused by excessive charging power and ineffective heat dissipation, or by high ambient temperatures (e.g., when a car wireless charger is used, the phone may be exposed to direct sunlight, causing its temperature to rise). If effective countermeasures are not taken when the temperature of the device being charged rises, it may reduce the phone's battery life, and in severe cases, may lead to battery damage or even spontaneous combustion.

[0069] See Figures 1-6 The wireless charger 10 includes a housing 100, a charging coil 200, a driving assembly 300, and a temperature sensor 700. The housing 100 includes a support portion 110, adapted to support a device to be charged. This device can be an electronic device capable of wireless charging, such as a mobile phone, watch, tablet, or computer. For ease of description, a mobile phone is used as an example below. The mobile phone can be placed on the support portion 110 for wireless charging. In some embodiments, the support portion 110 may only be used to support the mobile phone, in which case the phone can be placed at any position on the support portion 110. In other embodiments, the support portion 110, in addition to supporting the mobile phone, can also be used to position the mobile phone relative to itself. For example, a groove can be provided on the support portion 110, allowing the mobile phone to be embedded within the groove, so that when the support portion 110 supports the mobile phone, the relative position between the mobile phone and the support portion 110 is fixed (or the mobile phone can only move within a small range relative to the support portion 110), thereby fixing the relative position between the mobile phone's receiving coil and the wireless charger 10. See also... Figure 6 In this embodiment, the support part 110 is flat and is only used to support the mobile phone.

[0070] A charging coil 200 is disposed within the housing 100 and is adapted to wirelessly charge the device to be charged. Specifically, when the charging coil 200 is energized, it generates a changing magnetic field. The receiving coil of the mobile phone receives this changing magnetic field and generates an induced current, thereby achieving wireless charging. When wirelessly charging, the charging coil 200 needs to be matched with the position of the receiving coil of the mobile phone. The larger the overlap area between the charging coil 200 and the receiving coil along the axis parallel to the charging coil 200, the higher the charging power and efficiency. Therefore, when the charging coil 200 begins charging, it is necessary to maximize the overlap area between the charging coil 200 and the receiving coil along the direction parallel to the axis of the charging coil 200 to improve charging power and efficiency.

[0071] To improve charging power and efficiency, in some embodiments, charging markers can be provided on the support 110 to indicate the optimal charging position, guiding the user in placing the phone. After the user places the phone on the support 110 according to the marked position, the overlap area between the receiving coil and the charging coil 200 is larger, resulting in better charging power and efficiency for the wireless charger 10. However, in this solution, the user needs to adjust the relative positions of the phone and the wireless charger 10. The charging coil 200 passively matches the receiving coil, which is unreliable. Furthermore, the user cannot know the specific location of the receiving coil inside the phone, making it difficult to guarantee precise matching between the receiving coil and the charging coil 200. Therefore, see [link to relevant documentation]. Figure 3 , Figure 6 as well as Figure 7 In this embodiment, the charging coil 200 actively matches its position with the receiving coil. Specifically, a driving component 300 is provided inside the housing 100. The driving component 300 is connected to the charging coil 200 and is used to drive the charging coil 200 to move. The driving component 300 can drive the charging coil 200 to a position that matches the position of the receiving coil, so that the user does not need to finely adjust the relative position of the mobile phone and the wireless charger 10 when wirelessly charging, reducing the difficulty of operation for the user.

[0072] Temperature sensor 700 is used to detect the temperature of the device to be charged. Specifically, temperature sensor 700 can directly detect the temperature of the device to be charged, or it can indirectly detect the temperature of the device to be charged. When temperature sensor 700 indirectly detects the temperature of the device to be charged, for example, temperature sensor 700 can indirectly obtain the temperature of the device to be charged by measuring the temperature of a component that is in contact with the device to be charged. When temperature sensor 700 directly detects the temperature of the device to be charged, temperature sensor 700 can directly obtain the temperature of the device to be charged. Specifically, temperature sensor 700 can be in contact with the device to be charged. In some embodiments, the side of the support portion 110 facing the device to be charged has a cavity 112. The bottom of the cavity 112 communicates with the receiving cavity in the housing 100 (temperature sensor 700 is electrically connected to the first circuit board 410 or the second circuit board 420 through this communication position). Temperature sensor 700 is disposed in the cavity 112, and temperature sensor 700 is configured to be in contact with the device to be charged when the support portion 110 carries the device to be charged. This solution enables more accurate measurement of the temperature of the component to be charged.

[0073] In this embodiment, the driving component 300 is configured such that, during the charging process of the charging coil 200 on the device to be charged, when the temperature sensor 700 detects that the temperature of the device to be charged is greater than or equal to a first preset temperature (specifically, the first preset temperature can be greater than or equal to 60 degrees Celsius), it determines that the device to be charged may be overheating. Therefore, it reduces the charging power of the charging coil 200 to protect the device to be charged, preventing the temperature of the device to be charged from continuing to rise due to the high charging power, thus effectively protecting the device to be charged. Furthermore, unlike purely electronic control methods such as directly disconnecting charging or reducing charging current and charging voltage to reduce charging power, in this invention, the driving component 300 drives the charging coil 200 to move relative to the device to be charged, thereby reducing the overlapping area between the charging coil 200 and the receiving coil of the device to be charged, thereby reducing the charging power of the driving component. In this solution, by using a mechanical drive to reduce charging power, on the one hand, the power adjustment is more stable and less likely to fail due to overheating of the charging circuit of the wireless charger 10, which would cause the pure electronic control method to fail in adjusting the output power; on the other hand, the power adjustment is more precise, and the output power can be precisely adjusted by adjusting the position of the charging coil. When adjusting the output power using a pure electronic control method, the actual output power adjustment is affected by temperature, resulting in a larger power error.

[0074] In some embodiments, after a charging cycle is complete, the charging coil 200 can remain in its current position until the next charging cycle, when the driving component 300 adjusts the charging coil 200 to a position that matches the receiving coil of the mobile phone. In this scheme, the driving component 300 only needs to adjust the position of the charging coil 200 once during a single charging cycle, making the internal operation of the wireless charger 10 simpler. However, the applicant has found that, due to inertia, the relative positions of different types of devices to be charged placed on the support 110 by the user are generally not significantly different (the devices to be charged are generally placed near the center of the support 110). However, when the wireless charger 10 charges different types of devices, even if the relative positions of the different types of devices to be charged and the wireless charger 10 are the same, the relative positions of the receiving coil and the charging coil 200 will be different because the positions of the receiving coils within each device are different.

[0075] Based on the above principle, by statistically analyzing the arrangement positions of different types of receiving coils, and assuming that the relative positions of all types of devices to be charged and the carrier 110 are the same, a position with the most suitable total distance from multiple receiving coils can be found. This ensures that the charging coil 200 resets to the above position after each charging cycle, making it easier for the charging coil 200 to match the receiving coils of different types of devices to be charged. Specifically, in this embodiment, the driving component 300 is configured to drive the charging coil 200 from the charging position to the reset position after charging is completed. The charging position is the position where the charging coil 200 supplies power to the device to be charged, and the reset position is the position where the charging coil 200 is in standby mode when not supplying power. In other words, after each charging cycle, the charging coil 200 is reset. Compared to a scheme where the charging coil 200 remains in its original position (the position when charging) after each charging cycle, in this scheme, the charging coil 200 is in a specific position before the next charging cycle begins. Therefore, the specific orientation of the reset position can be designed in advance according to the type of device to be charged, so that the charging coil 200 can move as short a distance as possible to match the position of the receiving element of the device to be charged at the beginning of each charging cycle. The wireless charger 10 has higher charging response efficiency, shorter charging preparation time, and can charge the device to be charged more quickly.

[0076] It should be noted that in some embodiments, the charging coil 200 is in a fixed position when wirelessly charging. In this case, the charging position is a single location, which is the position of the charging coil 200 when charging. In other embodiments, the charging coil 200 may change position when wirelessly charging. In this case, the charging position is the position of the charging coil 200 when the wireless charger 10 generates a signal indicating that charging is complete.

[0077] In some embodiments, the reset position can be a position set at the factory before the wireless charger 10 leaves the factory. The reset position of the wireless charger 10 is fixed after leaving the factory and cannot be adjusted. In other embodiments, the reset position can be automatically or manually adjusted based on feedback. For example, the relative position of the receiving coil and the carrier 110 during wireless charging of the device to be charged can be monitored over a period of time to obtain the user's charging habits. Based on the above data, the optimal reset position is calculated, and the current reset position is converted into the calculated optimal reset position. After the position conversion, the device can be reset to the converted optimal reset position when the subsequent wireless charging ends.

[0078] In this document, both "charging position" and "reset position" are defined as positions relative to the support unit 110. Furthermore, the charging position is a pre-determined position, depending on the placement of the device to be charged each time the user charges; while the reset position is a fixed position during a single charging cycle. In some scenarios, the charging position and the reset position are different; in some special scenarios, they can be the same. When the charging position and the reset position happen to be the same, the charging coil 200 remains stationary after charging is complete.

[0079] The wireless charger 10 has multiple indications of "charging complete". In one embodiment, when the wireless charger 10 senses that the phone is fully charged, it can internally generate a signal indicating charging complete. At this time, the driving component 300 drives the charging coil 200 from the charging position to the reset position. In another embodiment, when the wireless charger 10 senses that the phone has detached from the support part 110, it can internally generate a signal indicating charging complete. At this time, the driving component 300 drives the charging coil 200 from the charging position to the reset position. In yet another embodiment, when the wireless charger 10 senses a charging abnormality, such as an abnormal internal temperature of the wireless charger 10, an abnormal temperature of the phone, or abnormal parameters such as current or voltage within the wireless charger 10, the wireless charger 10 internally generates a signal indicating charging complete. At this time, the driving component 300 drives the charging coil 200 from the charging position to the reset position. In this embodiment, if the wireless charger 10 senses a charging abnormality, it promptly drives the charging coil 200 to reset, effectively protecting the phone. Furthermore, in this embodiment, if the wireless charger 10 senses a charging abnormality but finds that the charging position coincides with the reset position or the charging position is too close to the reset position, a protection position can be set inside the wireless charger 10. At this time, the driving component 300 does not drive the charging coil 200 to move to the reset position, but drives the charging coil 200 to move to the protection position, thereby effectively protecting the mobile phone.

[0080] The driving component 300 can drive the charging coil 200 to move linearly, move along a curve, rotate along a curve, or both move and rotate along a curve. In this embodiment, see [reference needed]. Figures 6-9 The driving component 300 drives the charging coil 200 to reciprocate along a straight line. In this embodiment, on the one hand, the structure of the driving component 300 is simpler, and on the other hand, the movement dimension of the charging coil 200 is lower, making it easier to quickly match the relative positions of the charging coil 200 and the receiving coil.

[0081] When the drive component 300 reciprocates in a straight line, the reset position can be located in the middle or at the end of the movement stroke. In some embodiments, the drive component 300 is configured to drive the charging coil 200 to reciprocate in a straight line along a first direction X. The reset position is located at the end of the movement stroke of the charging coil 200 along the first direction X. In this embodiment, before each charging begins, the charging coil 200 is located at the end of its movement stroke. After charging begins, the drive component 300 only needs to drive the charging coil 200 to move along the first direction X or in the opposite direction of the first direction X to match the relative position with the receiving coil. No back-and-forth movement is required during the position matching process of the charging coil 200. The maximum movement distance of the charging coil 200 during the matching process is the maximum movement stroke of the charging coil 200 along the first direction X. Compared to a reset position located in the middle of the movement stroke of the charging stroke, the maximum delay during the charging preparation process is lower. For example, in this embodiment, when the receiving coil is located at the end of the movement stroke of the charging coil 200 and at an end different from the reset position, the charging delay of the wireless charger 10 is the longest. During the matching process of the charging coil 200, the charging coil 200 needs to move its maximum stroke along the first direction X. However, when the reset position of the charging coil 200 is located in the middle of its movement stroke, if the charging coil 200 moves in the wrong direction during the matching process, it needs to perform a reversal movement. At this time, the movement distance of the charging coil 200 may be greater than its maximum stroke along the first direction X, thus the charging preparation time is longer.

[0082] When the driving component 300 drives the charging coil 200 to reciprocate along a straight line parallel to the first direction X, in some embodiments, the first direction X can be perpendicular to the direction from the support portion 110 to the device to be charged, or it can be parallel to the direction from the support portion 110 to the device to be charged. When the first direction X is perpendicular to the direction from the support portion 110 to the device to be charged, the driving component 300 drives the charging coil 200 to be offset from the receiving coil of the device to be charged, reducing the overlap area. When the first direction X is parallel to the direction from the support portion 110 to the device to be charged, the driving component 300 drives the charging coil 200 to be further away from the receiving coil of the device to be charged, which can also reduce the charging power. In a further embodiment, the charging power of the charging coil 200 can be reduced to zero. See also Figures 6-9 In this embodiment, the first direction X is perpendicular to the direction from the support portion 110 to the device to be charged.

[0083] In other embodiments, the drive assembly 300 is configured to drive the charging coil 200 to rotate about a first axis parallel to the direction from the support portion 110 to the device to be charged; or, the first axis is perpendicular to the direction from the support portion 110 to the device to be charged. Both of these embodiments can reduce the charging power of the charging coil 200.

[0084] The specific structure of the driver component 300 depends on the actual requirements; see [link / reference]. Figures 6-9 ,as well as Figures 11-12 In some embodiments, the drive assembly 300 includes a drive unit 310 and a transmission unit 320 connected to the drive unit 310. The transmission unit 320 includes a support base 324 connected to the charging coil 200. The wireless charger 10 also includes a guide rail 500, the axis of which is parallel to a first direction X. The support base 324 includes a first slider 3242 slidably connected to the guide rail 500. The drive unit 310 drives the support base 324 to reciprocate along the guide rail 500 in the first direction X. Through the sliding engagement between the guide rail 500 and the first slider 3242, the movement of the support base 324 can be made smoother. In some embodiments, the two ends of the guide rail 500 can be connected to fixed protrusions. In this case, the fixed protrusions at both ends of the guide rail 500 are not only used to fix the guide rail 500, but also to limit the movement stroke of the first slider 3242. When the first slider 3242 moves along the first direction X to abut one of the fixed protrusions, the support 324 moves to one end position within its movement stroke. When the first slider 3242 moves in the opposite direction of the first direction X to abut another fixed protrusion, the support 324 moves to the other end position within its movement stroke. Furthermore, in this embodiment, when the first slider 3242 moves to abut one of the fixed protrusions, the position of the charging coil 200 is the reset position.

[0085] See Figures 6-7 ,as well as Figures 11-12 In some embodiments, the wireless charger 10 includes two guide rails 500 arranged opposite each other along a second direction Y. The support base 324 includes two first sliders 3242, which are slidably connected to the two guide rails 500 in a one-to-one correspondence. The axes of the two guide rails 500 are parallel to the first direction X, and the two guide rails 500 are spaced apart and opposite each other along the second direction Y. By setting two guide rails 500, the guidance of the support base 324 is made more stable.

[0086] See Figures 6-7 ,as well as Figures 11-12 In some embodiments, the transmission unit 320 further includes a screw 323, the axis of which is parallel to the first direction X. The support base 324 includes a second slider 3243 sleeved on the screw 323, the second slider 3243 having an internal thread that mates with the screw 323. The screw 323 passes through the second slider 3243, and bearings are provided at both ends of the screw 323. When the driving unit 310 drives the screw 323 to rotate, the second slider 3243 is driven by the screw 323 to reciprocate along the axial direction of the screw 323 (i.e., the first direction X), thereby causing the support base 324 as a whole to reciprocate along the first direction X, and thus causing the charging coil 200 to reciprocate along the first direction X. In this embodiment, the screw 323 is used to drive the support base 324, resulting in higher driving stability and driving accuracy.

[0087] To further improve drive accuracy, see Figures 11-12 In some embodiments, the drive unit 310 may include a drive motor, a first gear 321, and a second gear 322. The drive motor may specifically be a stepper motor, resulting in higher driving precision. The first gear 321 is connected to the output shaft of the stepper motor, and the second gear 322 is connected to the end of the screw 323; the first gear 321 and the second gear 322 mesh. During the driving process, the stepper motor drives the first gear 321 to rotate, the first gear 321 drives the second gear 322 to rotate, the second gear 322 drives the screw 323 to rotate, and the screw 323 drives the support base 324 to translate along the first direction X. Specifically, the number of teeth on the first gear 321 is less than the number of teeth on the second gear 322, thereby making the rotational speed of the screw 323 less than the rotational speed of the stepper motor, thus improving driving precision.

[0088] See Figure 6 as well as Figure 12The support base 324 also includes a support plate 3241. Two first sliders 3242 are connected to one side of the support plate 3241 along the first direction X, and correspondingly connected to both sides of the support plate 3241 along the second direction Y. A second slider 3243 is connected to the other side of the support plate 3241 along the first direction X (i.e., the side opposite to the two first sliders 3242). In this design, the support base 324 forms a three-point positioning system, which provides more stable transmission compared to a structure where the screw 323 is located beside the two guide rails 500. The screw 323 is located on one side of the two guide rails 500 along the first direction X, and along the second direction Y, the screw 323 is located between the two guide rails 500. In other words, in this embodiment, when viewed along the first direction X, the screw 323 is located between the two guide rails 500, and in this embodiment, when viewed along the second direction Y, the screw 323 is located on one side of the two guide rails 500. In this scheme, the distance between the second slider 3243 and the two first sliders 3242 along the first direction X is longer, making the positioning of the support 324 more stable.

[0089] The charging coil 200 translates along the first direction X to achieve positional matching with the receiving coil. When the receiving coil deviates from the charging coil 200 along the second direction Y, the matching degree between the charging coil 200 and the receiving coil is not ideal, regardless of where the charging coil 200 moves along the first direction X. Therefore, see [reference needed]. Figure 6 as well as Figures 8-9 In some embodiments, the support base 324 further includes a support plate 3241, and the charging coil 200 is disposed on the side of the support plate 3241 facing the bearing portion 110. The guide rail 500, the first slider 3242, the screw 323, the second slider 3243, and the drive portion 310 are all disposed on the side of the support plate 3241 away from the bearing portion 110. In this design, since the charging coil 200, guide rail 500, first slider 3242, screw 323, second slider 3243, and drive unit 310 are distributed on different sides of the support plate 3241, these components do not occupy the space of the charging coil 200 along the second direction Y. Therefore, the size of the charging coil 200 along the second direction Y can be maximized. Consequently, when the mobile phone is placed offset along the second direction Y on the support unit 110, the overlapping area between the charging coil 200 and the mobile phone's receiving coil can also be maximized, improving charging power and efficiency. Furthermore, the size of the charging coil 200 along the second direction Y can be approximately equal to the size of the inner cavity of the housing 100 along the second direction Y. For example, along the second direction Y, the distance between the two sides of the charging coil 200 and the inner wall of the housing 100 can be less than or equal to two millimeters.

[0090] See Figure 3 , Figure 6 , Figure 7 , Figure 9 as well as Figure 10 In some embodiments, the wireless charger 10 further includes a first circuit board 410 disposed between the support base 324 and the charging coil 200. The first circuit board 410 is electrically connected to the charging coil 200 and is used to transmit electrical signals to the charging coil 200 or to acquire electrical signals generated by the charging coil 200. In order to reduce the thickness dimension (i.e., the dimension along the third direction Z) of the wireless charger 10, the support base 324 has a first wall surface 3245 facing the support portion 110. The charging coil 200 is attached to the first wall surface 3245. The first wall surface 3245 is recessed with a groove. The first circuit board 410 is disposed in the groove and electrically connected to the charging coil 200. In this solution, on the one hand, by setting a recessed groove, the overall thickness of both the support plate 3241 and the first circuit board 410 can be reduced, thereby reducing the overall thickness of the wireless charger 10. On the other hand, since the first circuit board 410 is recessed into the groove, the charging coil 200 can be attached to the support plate 3241. Compared to a structure where the charging coil 200 is completely attached to the first circuit board 410, the size of the first circuit board 410 in this embodiment can be smaller to achieve the same support area for the charging coil 200, thus reducing the material cost of the first circuit board 410. In the above embodiment, the first circuit board 410 is fixed to the support base 324. In other embodiments, the first circuit board 410 can also be fixed to the housing 100, and a wire is provided between the first circuit board 410 and the charging coil 200. The wire is bent to leave a compensation margin, so that the charging coil 200 and the first circuit board 410 can generate relative movement while being electrically connected to each other.

[0091] See Figures 8-10 In some embodiments, the wireless charger 10 further includes a second circuit board 420, which is electrically connected to the first circuit board 410, and together they control the internal components of the wireless charger 10. To facilitate this electrical connection, the recess can at least partially penetrate the support plate 324, and the first circuit board 410 is electrically connected to the second circuit board 420 through the portion of the support plate 3241 through which the recess penetrates. See also... Figure 6 as well as Figure 9The first circuit board 410 includes a second wall 411 facing away from the charging coil 200. The second wall 411 includes an electrical connection area exposed in the recess, and the electrical connection area is connected to an electronic component 412. The electronic component 412 can be a resistor, capacitor, inductor, or processing chip, etc. In this solution, the recess is designed to pass through the position where the electronic component 412 needs to be placed on the first circuit board 410. This avoids positional interference between the electronic component 412 and the support plate 3241, and also further reduces the overall thickness of the first circuit board 410 and the support plate 3241. Furthermore, the second circuit board 420 can also be electrically connected to the electrical connection area, thereby facilitating the placement of the intermediate wires. In this embodiment, two circuit boards are used to control the internal components of the wireless charger 10. The first circuit board 410 is connected to the charging coil 200 and moves synchronously with the charging coil 200, while the second circuit board 420 is fixedly connected to the housing 100. Compared with a structure that uses a single circuit board to control all the internal components of the wireless charger 10, this method provides better control of the charging coil 200.

[0092] See Figure 6 In some embodiments, the carrier 110 includes a light-transmitting panel 111, which carries the device to be charged, and the charging coil 200 is visible through the light-transmitting panel 111. In this design, the user can observe the specific position of the charging coil 200 through the light-transmitting panel 111. On the one hand, the user can place the phone accordingly based on the observed position of the charging coil 200, facilitating the user's active matching of the relative positions of the receiving coil and the charging coil 200. On the other hand, if the driving component 300 malfunctions and the charging coil 200 fails to return to its reset position after charging, it can be detected promptly, allowing for timely repair of the wireless charger 10. Furthermore, especially when the wireless charger 10 is a car phone holder, the user may not know whether the car phone holder can wirelessly charge, for example, if the vehicle is rented, it is impossible to accurately determine whether the charging holder in the vehicle can wirelessly charge. The light-transmitting panel 111 makes the charging coil 200 externally visible, allowing the user to observe the structure of the charging coil 200 and understand the wireless charging function of the car phone holder.

[0093] To improve the visibility of the charging coil 200 in low-light environments, in some embodiments, the wireless charger 10 also includes a light-emitting element 430. The light-emitting element 430 illuminates the interior of the housing 100, allowing the user to observe the specific location of the charging coil 200 within the housing 100. When the housing 100 contains the light-emitting element 430, in one embodiment, the light-transmitting panel 111 can be configured such that the charging coil 200 is not visible when the light-emitting element 430 is off (i.e., the light-transmitting panel 111 is a colored semi-transparent plate), resulting in a cleaner appearance when the wireless charger 10 is not in operation; when the light-emitting element 430 is on, the charging coil 200 is visible, making it easier for the user to observe the location of the charging coil 200. In other embodiments, the light-transmitting panel 111 can also be a completely transparent plate, such as a transparent glass plate or a transparent acrylic plate, so that the charging coil 200 is visible through the light-transmitting panel 111 regardless of whether the light-emitting element 430 is on or off.

[0094] The light-emitting element 430 can be disposed anywhere within the housing 100 that can illuminate the charging coil 200. In some embodiments, the light-emitting element 430 can be connected to the housing 100 and its position is fixed, not moving with the charging coil 200. See also Figure 3 as well as Figure 6 In some embodiments, the light-emitting element 430 is disposed inside the charging coil 200 and electrically connected to the first circuit board 410. In this solution, on the one hand, since the light-emitting element 430 moves with the charging coil 200, the illumination effect on the charging coil 200 is better; on the other hand, since the light-emitting element 430 is disposed inside the charging coil 200, the illumination effect of the light-emitting element 430 on all parts of the charging coil 200 is more uniform, and the light-emitting element 430 can make more reasonable use of the internal space of the charging coil 200, making the internal structural arrangement of the wireless charger 10 more compact.

[0095] In order to improve the illumination effect on the charging coil 200, in some embodiments the light-emitting element 430 can be in the shape of a ring. The light-emitting element 430 is located inside the charging coil 200 and the center of the light-emitting element 430 coincides with the center of the charging coil 200, or the light-emitting element 430 is arranged around the outside of the charging coil 200 and the center of the light-emitting element 430 coincides with the center of the charging coil 200.

[0096] See Figure 3 , Figure 6 as well as Figures 11-12In some embodiments, the wireless charger 10 further includes a sensor 440 for detecting whether the carrier 110 is carrying a device to be charged. The sensor 440 can generate a signal indicating the start of charging (the wireless charger 10 can also generate a signal indicating the start of charging in other ways). The specific type of sensor 440 depends on the actual needs. In some embodiments, the sensor 440 is a pressure sensor 440, which detects the pressure on the carrier 110. When the sensor 440 detects an increase in pressure on the carrier 110, it determines that the carrier 110 is carrying the mobile phone, and thus generates a signal indicating the start of charging. In other embodiments, when the carrier 110 includes a light-transmitting panel 111, the sensor 440 can be an infrared sensor. The infrared sensor emits infrared light. When the mobile phone is carried on the light-transmitting panel 111, the infrared light is blocked and reflected, at which point the infrared sensor generates a signal indicating the start of charging. In a further embodiment, the sensor 440 is located inside the charging coil 200. In this scheme, the sensor 440 is arranged in a more reasonable position, which can make reasonable use of the internal space of the charging coil 200, making the internal structure of the wireless charger 10 more compact.

[0097] When the phone maintains a fixed relative position with the carrier 110 during each charging cycle, the positional matching between the charging coil 200 and the receiving coil is more precise. To achieve this, see [link to documentation]. Figure 3 , Figure 6 as well as Figures 11-12 In some embodiments, the wireless charger 10 further includes a positioning component 600 connected to the housing 100. The positioning component 600 is used to position the device to be charged, thereby fixing the relative position of the device to be charged and the support portion 110. In this solution, after the mobile phone is supported on the support portion 110, the position of the mobile phone is fixed by a fixing device, and after the position of the mobile phone is fixed, the position of the mobile phone and the support portion 110 is fixed. In other words, the addition of the positioning component 600 ensures that the position of the mobile phone relative to the support portion 110 is fixed each time wireless charging is performed. After the position of the mobile phone and the support portion 110 is fixed, the position of the receiving coil of different mobile phone models can vary within a small range. On the one hand, this facilitates the position design of the reset position, and on the other hand, it shortens the movement distance of the charging coil 200 during the charging preparation process.

[0098] To achieve mobile phone positioning, in some embodiments, the positioning component 600 can be an annular flange connected to the support portion 110. When the mobile phone is positioned on the support portion 110, it can be embedded in the annular flange to fix its position to the support portion 110. In other embodiments, the positioning component 600 can include a magnet, which fixes the mobile phone by attracting magnetic components on the mobile phone. See also Figures 6-7In some embodiments, the positioning assembly 600 includes a support portion 610, a first clamping arm 620, and a second clamping arm 630. The support portion 610 is adapted to support the device to be charged. The portion of the support portion 610 used to support the device to be charged is located outside the housing 100, and the end of the support portion 610 opposite to the portion used to support the device to be charged extends into the housing 100. The support portion 610 is connected to the lower end of the housing 100, and its upper end is inserted into the housing 100. The support portion 610 is configured to be displaced downward relative to the support portion 110 under the weight of the device to be charged. As the support portion 610 moves downward, a portion of its upper end gradually extends out of the housing 100. During the process of the upper end of the support portion 610 extending out of the housing 100, the first clamping arm 620 and the second clamping arm 630 are driven to move in opposite directions, so that the first clamping arm 620 and the second clamping arm 630 are adapted to jointly clamp the lateral sides of the device to be charged. After the positioning component 600 positions the phone, the support part 610 positions the bottom of the phone, the first clamping arm 620 and the second clamping arm 630 position the lateral sides of the phone, and the bearing part 110 positions the back panel of the phone. In this embodiment, all three sides of the phone are positioned, and the user does not need to adjust the positioning orientation during the positioning process, making the positioning process simpler and the positioning accuracy higher.

[0099] When the positioning component 600 is a gravity support, in some embodiments, see [link to relevant documentation]. Figure 13 A sensing element can be installed on the support portion 610 of the gravity bracket to sense whether the support portion 110 is supporting a mobile phone. Specifically, a magnetic element 611 can be installed on the portion of the support portion 610 that extends into the housing 100. The magnetic element 611 can be a permanent magnet or an electromagnet, and it can generate a magnetic field. The magnetic element 611 is coupled to the charging coil 200. When the mobile phone is placed on the gravity bracket, the support portion 610 moves downward, thereby causing the magnetic element 611 to move. At this time, the charging coil 200 cuts the magnetic field lines generated by the magnetic element 611, thereby generating an induced current in the charging coil 200. After the first circuit board 410 receives the above signal, it determines that the mobile phone is supported on the support portion 110 and generates a signal indicating that charging has started. In this solution, only one magnetic element 611 (e.g., a magnet) needs to be added to determine whether the mobile phone is supported on the support part 110. This is less expensive than the structure of setting up components such as pressure sensor 440 or infrared sensor. Furthermore, the solution of adding magnetic element 611 does not require changing the structural layout of electronic components 412 on the first circuit board 410, and the modification cost is smaller.

[0100] In another embodiment, see Figures 14-15Alternatively, a microswitch 612 can be installed inside the wireless charger 10, and an abutment protrusion 613 can be provided on the side of the portion of the support 610 located inside the housing 100. The abutment protrusion 613 is configured to separate from the microswitch 612 when the support 610 is not supporting the phone, at which point the microswitch 612 is off; when the support 610 supports the phone, it moves down and presses the microswitch 612. The microswitch 612 is electrically connected to the second circuit board 420. When the second circuit board 420 senses that the microswitch 612 is off, it generates a signal indicating that charging has started. In this solution, the movement of the support 610 is used to sense whether the phone is supported on the support 110, resulting in more accurate sensing. In this solution, the microswitch 612 can generate not only a signal indicating that charging has started, but also a signal indicating that charging has ended.

[0101] When the wireless charger 10 includes a gravity support and is a car charging mount, the charging coil 200 may overheat and potentially damage internal components when the car charging mount is used to support a mobile phone. Therefore, in some embodiments, see... Figure 1 A light-shielding plate 800 can be provided inside the housing 100, located on the side of the charging coil 200 facing the light-transmitting panel 111. The driving assembly 300 is further configured to drive the charging coil 200 to a position blocked by the light-shielding plate 800 when the temperature sensor 700 senses a temperature of the charging coil 200 greater than or equal to a second preset temperature (the second preset temperature can be greater than or equal to 70 degrees Celsius). This prevents the charging coil 200 from overheating due to sun exposure when the wireless charger 10 is not in operation, thus extending the lifespan of the wireless charger 10. It should be noted that the temperature sensor 700 can be a single sensor or a combination of multiple sensors. When the temperature sensor 700 is a single sensor, it can simultaneously detect the temperature of the device to be charged and the temperature of the charging coil 200. When the temperature sensor 700 is a combination of multiple sensors, one sensor can detect the temperature of the device to be charged, and another sensor can detect the temperature of the charging coil 200.

[0102] The light-shielding plate 800 can be arranged in various ways. In some embodiments, the light-shielding plate 800 is located inside the housing 100 and is positioned between the charging coil 200 and the housing 110 along the direction from the support portion 110 to the device to be charged. In this arrangement, the light-shielding effect of the light-shielding plate 800 is better. In other embodiments, the support portion 110 includes the light-shielding plate 800, which is adapted to support the device to be charged, and the side of the light-shielding plate 800 is connected to the side of the light-transmitting panel 111. In this arrangement, the thickness of the wireless charger 10 can be reduced.

[0103] See Figure 16 A second aspect of the present invention also provides a wireless charging method for use with the wireless charger 10 in any of the above embodiments. The wireless charging method includes the following steps:

[0104] S102: Acquire a signal indicating the start of charging;

[0105] S104: Drive the charging coil 200 from the reset position to the charging position;

[0106] S106: Obtain a signal indicating the end of charging;

[0107] S108: Drive the charging coil 200 from the charging position to the reset position.

[0108] In this embodiment, the charging coil 200 is in a specific position before the next charging starts. Therefore, the specific orientation of the reset position can be designed in advance according to the type of device to be charged, so that the charging coil 200 can move as short a distance as possible to match the position of the power receiving element of the device to be charged when each charging starts. The wireless charger 10 has higher charging response efficiency, shorter charging preparation time, and can charge the device to be charged more quickly.

[0109] The method for determining the charging position can be determined according to actual needs. In this embodiment, the optimal charging position is determined by monitoring the charging power of the charging coil 200. Specifically, the charging power of the charging coil 200 is monitored in real time during the movement of the charging coil 200. When the charging power reaches its maximum, the charging position is located at the position where the charging power of the charging coil 200 is at its maximum. In actual operation, during the movement of the charging coil 200, the charging power generally undergoes a process of first increasing and then decreasing. Therefore, when a decrease in charging power is detected, the charging power before the decrease can be considered as the maximum charging power.

[0110] However, in practice, the applicant discovered that due to manufacturing precision issues with the charging coil 200 and the coil windings within the receiving coil, the maximum charging power position during the movement of the charging coil 200 may not necessarily occur at the point where the power initially decreases. In reality, the charging power may initially rise, then experience a slight decrease at a certain point, followed by another rise, and then another decrease. That is, the charging power fluctuates around the maximum power level. Therefore, directly identifying the point where the power initially decreases as the point of maximum power may contain a small error.

[0111] To compensate for errors, in some embodiments, the step of moving the charging coil 200 from the reset position to the charging position includes:

[0112] Obtain the charging power of charging coil 200;

[0113] The charging coil 200 is driven to move from its reset position along a preset path. In this embodiment, the charging coil 200 can be driven to translate along a first direction X or the reverse direction of the first direction X, i.e., the preset path is a straight line. When the charging coil 200 moves along a curve, the preset path is a curve. It should be noted that the order of the step of obtaining the charging power of the charging coil 200 and the step of driving the charging coil 200 to move from its reset position along the preset path can be interchanged.

[0114] If the charging power decreases, the charging coil 200 continues to move along a preset path for a preset time, and the position corresponding to the maximum charging power of the charging coil 200 is defined as the charging position. In other words, when the charging power decreases, the charging coil 200 can continue to move along a preset path for a preset time, which can be one to three seconds. After the charging coil 200 continues to run for the preset time, the position where the maximum charging power occurred during the entire operation of the charging coil 200 is defined as the charging position.

[0115] Drive the charging coil 200 to move to the charging position.

[0116] In the above embodiments, by continuing to drive the charging coil 200 to move for a preset time, even if power fluctuations occur near the maximum charging power, the position corresponding to the maximum power can be accurately determined, thereby improving the charging power and charging efficiency.

[0117] To account for errors, in some other embodiments, the step of moving the charging coil 200 from the reset position to the charging position includes:

[0118] Obtain the charging power of charging coil 200;

[0119] The charging coil 200 is driven to move from its reset position along a preset path. In this embodiment, the charging coil 200 can be driven to translate along a first direction X or the reverse direction of the first direction X, i.e., the preset path is a straight line. When the charging coil 200 moves along a curve, the preset path is a curve. It should be noted that the order of the step of obtaining the charging power of the charging coil 200 and the step of driving the charging coil 200 to move from its reset position along the preset path can be interchanged.

[0120] If the charging power decreases, the charging coil 200 continues to move along a preset path for a preset distance, and the position corresponding to the maximum charging power of the charging coil 200 is defined as the charging position. In other words, when the charging power decreases, the charging coil 200 can continue to move along a preset path for a preset distance, which can be between one centimeter and five centimeters. After the charging coil 200 has continued to move the preset distance, the position where the maximum charging power occurred during the entire operation of the charging coil 200 is defined as the charging position.

[0121] Drive the charging coil 200 to move to the charging position.

[0122] In the above embodiments, by continuing to drive the charging coil 200 to move a preset distance, even if power fluctuations occur near the maximum charging power, the position corresponding to the maximum power can be accurately determined, thereby improving the charging power and charging efficiency.

[0123] See Figure 17 The third aspect of the present invention also provides another wireless charging method, which is used in the wireless charger 10 of any of the above embodiments. The wireless charging method includes the following steps:

[0124] S202: Acquire the temperature of the device to be charged during the charging process;

[0125] S204: When the temperature of the device to be charged is greater than or equal to the first preset temperature, drive the charging coil 200 to move relative to the device to be charged in order to reduce the charging power of the charging coil 200.

[0126] The specific working process of this wireless charging method has been described in detail above and will not be repeated here. In this embodiment, the wireless charger 10 adopts the above-described wireless charging method, which can improve the safety of wirelessly charging the device to be charged.

[0127] In some embodiments, the wireless charger 10 includes a light-transmitting panel 111 adapted to hold a device to be charged, and the charging coil 200 is visible through the light-transmitting panel 111. The wireless charger also includes a light-shielding plate 800 located on the side of the charging coil 200 facing the support portion 110; the wireless charging method further includes:

[0128] Obtain the temperature of charging coil 200;

[0129] When the temperature of the charging coil 200 is greater than or equal to the second preset temperature, the charging coil 200 is driven to move to the position blocked by the light shield 800.

[0130] The specific working process of this wireless charging method has been described in detail above and will not be repeated here. In this embodiment, when the wireless charger 10 is not charging, due to changes in ambient temperature, such as the charging coil 200 being exposed to sunlight and causing its temperature to rise, the temperature of the charging coil 200 can be reduced by shielding the charging coil with the light shield 800, effectively protecting the internal components of the wireless charger 10.

[0131] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0132] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0133] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A wireless charger, characterized in that, include: The housing includes a support portion adapted to support the device to be charged; A charging coil is disposed inside the housing, and the charging coil is adapted to wirelessly charge the device to be charged. A drive assembly is disposed within the housing and connected to the charging coil, the drive assembly being used to drive the charging coil to move; A temperature sensor, suitable for monitoring the temperature of the device to be charged; The driving component is configured to drive the charging coil to move relative to the device being charged during the charging process of the charging coil charging the device to be charged, when the temperature sensor monitors that the temperature of the device to be charged is greater than or equal to a first preset temperature, so as to reduce the output power of the charging coil.

2. The wireless charger as described in claim 1, characterized in that, The driving component is configured to drive the charging coil to perform linear reciprocating motion along a first direction; The first direction is perpendicular to the direction from the support portion to the device to be charged; or, the first direction is parallel to the direction from the support portion to the device to be charged.

3. The wireless charger as described in claim 1, characterized in that, The drive component is configured to drive the charging coil to rotate about a first axis; The first axis is parallel to the direction from the support portion to the device to be charged; or, the first axis is perpendicular to the direction from the support portion to the device to be charged.

4. The wireless charger as described in claim 1, characterized in that, The support portion has a recessed cavity on the side facing the device to be charged. The bottom of the recessed cavity is connected to the receiving cavity inside the housing. The temperature sensor is located in the recessed cavity and is configured to fit against the device to be charged when the support portion supports the device to be charged.

5. The wireless charger as described in claim 1, characterized in that, The supporting part includes a light-transmitting panel, which is adapted to support the device to be charged, and the charging coil is visible through the light-transmitting panel; The wireless charger also includes a light-emitting element, which is disposed inside the charging coil.

6. The wireless charger as described in claim 5, characterized in that, The wireless charger also includes a light shield located on the side of the charging coil facing the light-transmitting panel; The driving component is further configured to drive the charging coil to a position blocked by the light shield when the temperature sensor senses that the temperature of the charging coil is greater than or equal to a second preset temperature.

7. The wireless charger as described in claim 6, characterized in that, The light-shielding plate is located inside the housing and along the direction from the support portion to the device to be charged, and the light-shielding plate is located between the charging coil and the support portion; or, The supporting part includes the light-shielding plate, which is adapted to support the device to be charged, and the side of the light-shielding plate is connected to the side of the light-transmitting panel.

8. The wireless charger as described in claim 1, characterized in that, The wireless charger also includes a positioning component connected to the housing. The positioning component is used to position the device to be charged to fix the relative position of the device to be charged and the support portion. The positioning component includes a support portion, a first clamping arm, and a second clamping arm. The support portion is adapted to support the device to be charged. The support portion is configured to be displaced downward relative to the support portion by the gravity of the device to be charged, and during the displacement, the first clamping arm and the second clamping arm are driven to move in opposite directions to each other, so that the first clamping arm and the second clamping arm are adapted to jointly clamp the lateral sides of the device to be charged.

9. A wireless charging method for use with the wireless charger according to any one of claims 1-8, characterized in that, The wireless charging method includes the following steps: The temperature of the device to be charged is obtained during the charging process. When the temperature of the device to be charged is greater than or equal to a first preset temperature, the charging coil is driven to move relative to the device to be charged in order to reduce the charging power of the charging coil.

10. The wireless charging method as described in claim 9, characterized in that, The carrier includes a light-transmitting panel adapted to support the device to be charged, and the charging coil is visible through the light-transmitting panel; the wireless charger also includes a light-shielding plate located on the side of the charging coil facing the carrier. The wireless charging method further includes: Obtain the temperature of the charging coil; When the temperature of the charging coil is greater than or equal to the second preset temperature, the charging coil is driven to move to a position where it is blocked by the light shield.

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