Wireless charging base and wireless charging system

Abstract

The application provides a wireless charging base and a wireless charging system. The wireless charging base comprises a shell, an impeller, a plurality of first transmitting coils and a switching control circuit. The shell has an air inlet and an air outlet. An outer surface of the shell has a charging area; the impeller is rotatably arranged in the shell and comprises a magnet; the plurality of first transmitting coils are fixed in the shell, each first transmitting coil is an independent coil winding, and each first transmitting coil has a charging working state and a driving working state. In the charging working state, the first transmitting coil is matched with a receiving coil of an electronic device for charging. In the driving working state, the first transmitting coil generates a driving magnetic field matched with the magnet to drive the impeller to rotate. The switching control circuit is used for controlling each first transmitting coil to switch between the charging working state and the driving working state. According to the wireless charging base, the volume is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless charging, in particular to a wireless charging base and a wireless charging system. BACKGROUND

[0002] Wireless charging technology (WCT) can realize wireless transmission of electric energy by using electromagnetic induction. At present, the application of WCT in electronic devices is more and more extensive due to its advantages of no wire restriction and no plugging. At present, electronic devices such as mobile phones and tablet computers use wireless charging bases for wireless charging. In the process of wireless charging, both the electronic device and the wireless charging base will generate heat, which seriously affects the charging performance of the electronic device and the wireless charging base.

[0003] In the related art, a cooling fan is usually arranged in the wireless charging base to realize forced convection cooling. However, the cooling fan occupies a large space in the wireless charging base, which is not conducive to the reduction of the volume of the wireless charging base. SUMMARY

[0004] The embodiments of the present application provide a wireless charging base and a wireless charging system, which are conducive to reducing the volume of the wireless charging base.

[0005] In a first aspect, the embodiments of the present application provide a wireless charging base, comprising: a shell, an impeller, a plurality of first transmitting coils and a switching control circuit. The shell has an air inlet and an air outlet. The outer surface of the shell has a charging area; the impeller is rotatably arranged in the shell, and the impeller comprises a magnet; the plurality of first transmitting coils are fixed in the shell, and the plurality of first transmitting coils are arranged in a ring array with the rotation axis of the impeller as the center line, the plurality of first transmitting coils are respectively opposite to different areas of the charging area, each first transmitting coil is an independent coil winding, and each first transmitting coil has a charging working state and a driving working state, in the charging working state, the first transmitting coil is matched with a receiving coil of an electronic device for charging, and in the driving working state, the first transmitting coil generates a driving magnetic field matched with the magnet to drive the impeller to rotate; and the switching control circuit is used to control each first transmitting coil to switch between the charging working state and the driving working state.

[0006] According to the wireless charging base provided in the embodiments of the present application, the plurality of first transmitting coils are arranged and correspond to different areas of the charging area, which is beneficial to improve the freedom of charging the electronic device by the wireless charging base. The switching control circuit can control the working state of each first transmitting coil, so that each first transmitting coil is switched between the driving working state and the charging working state, so that the first transmitting coil has the functions of the charging coil and the driving coil. When the first transmitting coil works in the charging working state, it can be matched with the electronic device for charging, so as to charge the electronic device. When the first transmitting coil works in the driving working state, it can drive the impeller to rotate and dissipate heat of the wireless charging base, so that the driving coil winding in the related art can be omitted, which is beneficial to save cost and reduce the size of the wireless charging base.

[0007] In some embodiments of the first aspect of the present application, the switching control circuit is configured to control at least one of the plurality of first transmitting coils to work in the charging working state and control the remaining first transmitting coils to work in the driving working state. Specifically, the switching control circuit is configured to control one of the plurality of first transmitting coils to work in the charging working state. The plurality of first transmitting coils are in the orthographic projection of the charging area, and the one of the plurality of first transmitting coils has the maximum overlapping area with the orthographic projection of the receiving coil of the electronic device in the orthographic projection of the charging area. In this way, not only the charging efficiency of the electronic device can be ensured to avoid waste of electric energy, but also the driving effect of the remaining first transmitting coils on the impeller in the driving working state can be ensured.

[0008] In some embodiments of the first aspect of the present application, the wireless charging base further comprises at least one temperature detection device configured to detect the current temperature of the charging area. The switching control circuit is electrically connected to the temperature detection device, and the switching control circuit is configured to control the remaining first transmitting coils to work in the driving working state when the current temperature is greater than or equal to a preset threshold. In this way, on the one hand, the heat dissipation effect of the wireless charging base can be improved, and on the other hand, the waste of electric energy caused by the low temperature of the charging area or the charging area not being too high in temperature due to charging in cold seasons can be prevented, and the charging efficiency can be ensured.

[0009] For example, in the charging area, the temperature of the area opposite to the first transmitting coil for charging is higher than the temperature of other areas, and therefore, in order to improve the accuracy of detection of the temperature detection device, the temperature detection device can be multiple, and the multiple temperature detection devices are arranged at intervals to detect the temperature of the area opposite to different first transmitting coils in the charging area respectively. That is, the orthographic projection of each first transmitting coil in the charging area overlaps with the orthographic projection of at least one temperature detection device. The switching control circuit is configured to control the remaining first transmitting coils to work in the driving working state when the temperature of the charging area detected by at least one temperature detection device of all the multiple temperature detection devices is greater than or equal to a preset threshold.

[0010] In some embodiments of the first aspect of the present application, the wireless charging base has a charging mode and a heat dissipation mode, and the switching control circuit is configured to control at least one first transmitting coil of the multiple first transmitting coils to work in the charging working state in the charging mode, and the switching control circuit is configured to control all the first transmitting coils to work in the driving working state in the heat dissipation mode. Thus, it is beneficial to work the wireless charging base in a single mode, and improve the reliability of the wireless charging base.

[0011] In some embodiments of the first aspect of the present application, the wireless charging base further comprises at least one temperature detection device, the temperature detection device is configured to detect the current temperature of the charging area, and the switching control circuit is electrically connected with the temperature detection device, and the switching control circuit is configured to control the wireless charging base to enter the heat dissipation mode when the current temperature is greater than or equal to a preset threshold.

[0012] In some other embodiments, the wireless charging base further comprises a timer. The switching control circuit is electrically connected with the timer. The timer is configured to start timing when the switching control circuit controls at least one first transmitting coil of the multiple first transmitting coils to be matched with the receiving coil of the electronic device for charging, to detect the charging duration of at least one first transmitting coil of the multiple first transmitting coils matched with the receiving coil of the electronic device for charging. The switching control circuit is configured to control the remaining first transmitting coils to work in the driving working state only when the charging duration is greater than or equal to a preset duration. In this way, on the one hand, it is beneficial to improve the heat dissipation effect of the wireless charging base, and on the other hand, it can also prevent the waste of electric quantity caused by the relatively low temperature of the charging area or the charging area not being too high due to charging in cold seasons.

[0013] In some embodiments of the first aspect of the present application, the wireless charging base further comprises at least one position detection device configured to detect a magnetic pole position signal of the magnet; the wireless charging base further comprises a charging circuit and a power supply circuit connected in parallel; the charging circuit comprises an inverter circuit, and each first transmitting coil is connected to the input end of the inverter circuit and the output end of the inverter circuit through two first switches respectively; the power supply circuit comprises a driving chip, and the driving chip is electrically connected to the position detection device; each first transmitting coil is connected to the input end of the driving chip and the output end of the driving chip through two second switches respectively; and the switching control circuit is configured to control the opening and closing of the first switches and the second switches corresponding to each first transmitting coil, so as to control the first transmitting coil to switch between the charging working state and the driving working state. Through the control of the switching control circuit on the first switches and the second switches, the first transmitting coil can have the functions of a charging coil and a driving coil. When the first transmitting coil works in the charging working state, it can be matched with the electronic device for charging, so as to charge the electronic device. When the first transmitting coil works in the driving working state, it can drive the impeller to rotate, so that the driving coil winding in the related art can be omitted, which is conducive to saving cost and reducing the size of the wireless charging base.

[0014] In some embodiments of the first aspect of the present application, the first transmitting coil is a planar coil, and the central axis of the first transmitting coil is arranged in parallel with the rotation axis of the impeller. In this way, the space occupied by the first transmitting coil in the shell in the axial direction of the impeller can be reduced, so as to reduce the size of the shell in the axial direction of the impeller, and further reduce the size of the shell.

[0015] In some embodiments of the first aspect of the present application, the wall plate where the charging area is located is located on one side of the impeller in the axial direction of the impeller, and along the axial direction of the impeller, the plurality of first transmitting coils are located on the side of the impeller close to the charging area. In this way, the distance between the first transmitting coils and the charging area can be reduced, the coupling coefficient between the first transmitting coils and the receiving coil of the electronic device can be improved, and the charging effect can be improved.

[0016] For example, the plurality of first transmitting coils are fixed on the wall plate where the charging area is located. In this way, the distance between the plurality of first transmitting coils and the charging area can be shortened, so as to improve the coupling coefficient between the first transmitting coils and the receiving coil of the electronic device, and improve the charging efficiency of the electronic device.

[0017] In some embodiments of the first aspect of the present application, the wireless charging station further includes a first magnetic conductive plate, which is disposed on the other axial side of the impeller. The orthographic projections of the plurality of first transmitting coils are located within the first magnetic conductive plate. This can increase the magnetic flux density (i.e., magnetic flux) of the magnetic circuit of the first transmitting coils, reduce losses, and improve charging efficiency.

[0018] In some embodiments of the first aspect of the present application, there are at least four first transmitting coils, and the number of first transmitting coils is an even number. This facilitates using the driver chip to control the magnetic field directions of two adjacent first transmitting coils to be opposite, thereby facilitating cooperation with the magnet to achieve continuous rotation of the impeller.

[0019] In some embodiments of the first aspect of the present application, the impeller includes a hub and a plurality of blades, the hub being rotatably disposed within a housing, and the plurality of blades being spaced apart around the outer circumference of the hub. Magnets are disposed on the blades. Because the plurality of first transmitting coils are arranged in a circular array with the impeller's rotational axis as the centerline, disposing the magnets on the blades facilitates displacing the magnets away from the central axis of the hub, thereby facilitating closer alignment of the magnets with the magnetic field centers of the first transmitting coils, thereby facilitating coordination between the magnets and the plurality of first transmitting coils to drive the impeller.

[0020] Specifically, there are an even number of magnets, each of which is disposed on different blades. These magnets are evenly spaced around the circumference of the hub. In the circumference of the hub, one of two adjacent magnets has its north pole pointing toward the hub's central axis, while the other magnet has its south pole pointing toward the hub's central axis. This facilitates the magnets' cooperation with the first transmitting coil to drive the impeller's continuous rotation.

[0021] Exemplarily, the number of first transmitting coils is greater than or equal to the number of magnets, and the ratio of the number of first transmitting coils to the number of magnets is a positive integer. This helps ensure that the first transmitting coils and the magnets work together effectively, enabling continuous rotation of the impeller.

[0022] In some embodiments of the first aspect of the present application, the central axis of the first transmitting coil is arranged parallel to the rotational axis of the impeller, the wall panel where the charging area is located is located on one axial side of the impeller, and along the axial direction of the impeller, the multiple first transmitting coils are located on the side of the impeller closer to the charging area. The cylindrical surface where the central axes of the multiple first transmitting coils are located serves as a reference cylindrical surface, and the end of each magnet away from the hub is located on the reference cylindrical surface. This helps increase the magnetic field strength between the magnet and the first transmitting coil, thereby improving the driving force on the impeller.

[0023] In some embodiments of the first aspect of the present application, the wireless charging base further comprises a second transmitting coil fixed in the housing, the second transmitting coil is located on one side of the impeller close to the charging area and opposite to the middle part of the charging area, and the plurality of first transmitting coils are arranged around the second transmitting coil. In this way, when the user places the electronic device at different positions of the charging area, the receiving coil of the electronic device and the second transmitting coil can both successfully establish wireless communication, the second transmitting coil is used as the main transmitting coil to charge the electronic device, and the first transmitting coils are used as auxiliary transmitting coils to improve the charging efficiency.

[0024] For example, the second transmitting coil can be fixed on the wall plate where the charging area 123 is located by means of adhesion, clamping or welding. In this way, the distance between the second transmitting coil and the charging area is shortened, the coupling coefficient between the second transmitting coil and the receiving coil of the electronic device is improved, and the charging efficiency is further improved.

[0025] In some embodiments of the first aspect of the present application, the second transmitting coil is a planar coil, and the central axis of the second transmitting coil is consistent with the extension direction of the rotation axis of the impeller. In this way, the size of the second transmitting coil in the axial direction of the impeller is reduced, and the thickness of the housing is further reduced.

[0026] In some embodiments, the orthographic projection of the plurality of first transmitting coils on the charging area is located outside the orthographic projection of the second transmitting coil on the charging area. In this way, the mutual interference between the first transmitting coils and the second transmitting coil during operation is reduced.

[0027] In some embodiments of the first aspect of the present application, the wireless charging base further comprises a second magnetic conducting plate arranged between the second transmitting coil and the impeller, and the plurality of first transmitting coils are located on the side facing the outer circumferential surface of the second magnetic conducting plate. In this way, the magnetic flux density (i.e. the magnetic flux) of the magnetic circuit of the second transmitting coil is improved, the loss is reduced, and the charging efficiency is improved.

[0028] In the second aspect, the embodiments of the present application provide a wireless charging system, comprising: a wireless charging base and an electronic device. The wireless charging base is any of the technical solutions described above. The electronic device comprises a receiving coil, which is used for charging matching with at least one of the plurality of first transmitting coils.

[0029] For example, the electronic device is a mobile phone or a tablet computer.

[0030] It can be understood that the beneficial effects of the wireless charging system provided in the second aspect described above can refer to the beneficial effects of the wireless charging base provided above, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A schematic diagram of the charging status of a wireless charging system provided in some embodiments of the present application;

[0032] Figure 2 Based on Figure 1 A schematic diagram of an electronic device in the wireless charging system shown;

[0033] Figure 3 Based on Figure 1 A schematic diagram of a wireless charging station is shown;

[0034] Figure 4 Based on Figure 1 The three-dimensional structural diagram of the wireless charging stand shown;

[0035] Figure 5 Based on Figure 4 An exploded diagram of the wireless charging station shown;

[0036] Figure 6 Based on Figure 4 The cross-sectional structure diagram of the wireless charging stand shown is taken along line AA;

[0037] Figure 7 Based on Figure 5 The impeller is shown as a schematic diagram along the axial direction of the impeller;

[0038] Figure 8 Schematic diagram of charging scenarios for some wireless charging systems for this application;

[0039] Figure 9 Based on Figure 5 A schematic diagram of the circuit connection between the switching control circuit and the first transmitting coil of the wireless charging stand shown;

[0040] Figure 10 Based on Figure 9 The charging process diagram of the wireless charging station shown;

[0041] Figure 11 Based on Figure 5 Schematic diagram of the first transmitting coil and magnet in the wireless charging station cooperating to drive the impeller to rotate;

[0042] Figure 12 Schematic diagram of the cooperation between the first transmitting coil and the magnet in the wireless charging station of other embodiments of the present application to drive the impeller to rotate;

[0043] Figure 13 Schematic diagram of an exploded view of a wireless charging station according to some further embodiments of the present application;

[0044] Figure 14 Based on Figure 13An electrical connection diagram of a first transmitting coil, a second transmitting coil and a switching control circuit of the wireless charging base shown;

[0045] Figure 15 For according to Figure 13 A cross-sectional structure diagram of the wireless charging base shown. DETAILED DESCRIPTION

[0046] In the embodiments of the present application, the term "exemplary" or "for example" is used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the terms "exemplary" or "for example" is intended to present concepts in a concrete manner. In the embodiments of the present application, the terms "first", "second" are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0047] In the embodiments of the present application, the terms "first", "second" are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0048] In the description of the embodiments of the present application, the term "at least one" refers to one or more, and "multiple" refers to two or more. "At least one of the following" or the like refers to any combination of the items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0049] In the description of the embodiments of the present application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" is a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0050] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" means that the relative positional relationship after connection is unchanged.

[0051] In the description of the embodiments of the present application, unless specifically defined and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, "connection" can be detachable connection, or can be non-detachable connection, can be direct connection, or can be indirect connection through intermediate medium. The orientation terms mentioned in the embodiments of the present application, such as "inner", "outer", "upper", "lower", "front", "back", "left", "right" and the like, are only the directions of the drawings, therefore, the orientation terms used are for better, clearer illustration and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of another identical element in the process, method, article or device including the element. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0053] At present, electronic devices usually use electromagnetic induction type wireless charging technology for wireless charging. That is, a transmitting coil is installed in the wireless charging base, and high-frequency alternating current is connected in the transmitting coil to generate an alternating electromagnetic field, and a receiving coil is installed in the electronic device. When the electronic device is close to the wireless charging base, the receiving coil can generate an induced current in the receiving coil in response to the alternating electromagnetic field generated by the transmitting coil, thereby transferring the power of the transmitting coil from the wireless charging base to the electronic device, thereby completing the charging process of the electronic device.

[0054] In the process of transferring power to the electronic device, the wireless charging base often generates a large amount of heat, affecting the safety of charging. In order to solve this technical problem, in the related art, a heat dissipation fan is usually integrated in the wireless charging base, and forced convection heat dissipation is realized by using the heat dissipation fan to achieve the purpose of cooling the wireless charging base.

[0055] A cooling fan (taking a brushless DC fan as an example) typically includes a brushless motor and an impeller. A brushless motor typically consists of a stator, a rotor, and a position detection device. The rotor of a brushless motor is a permanent magnet. The rotor of countless motors, along with the output shaft, is connected to the impeller. The stator consists of a stator core and drive coil windings. The stator core has multiple stator teeth. Three-phase or two-phase stator coil windings are wound around different stator teeth. By energizing the different coil windings, a drive magnetic field is generated that aligns with the rotor, driving the impeller. The position detection device detects the position of the rotor's magnetic poles relative to the stator, generates a magnetic pole position signal at a specific location, and transmits this magnetic pole position signal to the driver chip. After processing by the driver chip's signal conversion circuit, the driver chip controls its internal power switching circuit (e.g., a full-bridge circuit or a half-bridge circuit) to control the commutation of current in the different drive coil windings according to a specific logical relationship, achieving continuous rotation of the rotor. Position detection devices are generally of three types: magnetic (e.g., Hall effect sensors), photoelectric (e.g., photoelectric sensors), and electromagnetic (e.g., electromagnetic sensors). The specific structure and operating principle of brushless motors are well known to those skilled in the art and will not be further described.

[0056] The above analysis shows that the cooling fan, including the stator and rotor, is relatively large and occupies a significant amount of space within the wireless charging station, hindering its reduction in size. Furthermore, the wireless charging station is equipped with two types of coils: a transmitting coil and a drive coil winding for driving the impeller. During the actual research and development process, the inventors boldly envisioned a solution: if only one type of coil were provided within the wireless charging station, and this coil were used to both charge the electronic device and, in conjunction with the rotor, drive the impeller. This would inevitably save space within the wireless charging station, reduce its size, and lower its material costs. Based on this concept, the inventors conducted research and development from the perspective of sharing both the transmitting coil for charging the electronic device and the drive coil for driving the impeller in conjunction with the rotor, and subsequently proposed the present application.

[0057] The technical solution of this application will be introduced below with reference to the accompanying drawings.

[0058] The present application provides a wireless charging system, which is a type of wireless charging system with a wireless charging base.

[0059] See also Figure 1 , Figure 1 Schematic diagram of the charging state of a wireless charging system 1000 provided in some embodiments of the present application. Specifically, the wireless charging system 1000 includes an electronic device 500 and a wireless charging stand 100.

[0060] It should be noted that the electronic device 500 in the embodiment of the present application can be a mobile phone, digital camera, video camera, smart watch, tablet computer, desktop, laptop, handheld computer, notebook computer, driving recorder, ultra-mobile personal computer (UMPC), netbook, and cellular phone, etc., which has the function of receiving wireless power. In addition, the electronic device 500 can also be a car computer, a personal digital assistant (PDA), an augmented reality (AR) or virtual reality (VR) device, etc. The embodiment of the present application does not impose any special restrictions on the specific form of the electronic device 500. Figure 1 In the specific example shown, the electronic device 500 is a mobile phone.

[0061] See also Figure 2 , Figure 2 Based on Figure 1 The figure shows a schematic diagram of an electronic device 500 in a wireless charging system 1000. The electronic device 500 may include a processor 510, an external memory interface 520, an internal memory 521, a key 530, a charging management module 540, a power management module 541, a battery 542, a wireless charging receiver 543, a display 560, a wireless communication module 570, and a mobile communication module 550.

[0062] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 500. In other embodiments of the present application, the electronic device 500 may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0063] The processor 510 may include one or more processing units. For example, the processor 510 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and a neural-network processing unit (NPU). The different processing units may be independent devices or integrated into one or more processors.

[0064] The controller can be the nerve center and command center of the electronic device 500. The controller can generate operation control signals according to instruction operation codes and timing signals, and complete the control of instruction fetching and instruction execution.

[0065] The processor 510 can also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 510 is a cache memory. The memory can store instructions or data that the processor 510 has just used or recycled. If the processor 510 needs to use the instructions or data again, it can be directly called from the memory. This avoids repeated access and reduces the waiting time of the processor 510, thereby improving the efficiency of the system.

[0066] The external memory interface 520 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 500. The external memory card communicates with the processor 510 through the external memory interface 520 to realize data storage functions. For example, files such as music and videos are stored in the external memory card.

[0067] The internal memory 521 can be used to store computer executable program codes, which include instructions. The processor 510 executes various functional applications and data processing of the electronic device 500 by running the instructions stored in the internal memory 521. The internal memory 521 can include a program storage area and a data storage area. The program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), etc. The data storage area can store data created during the use of the electronic device 500 (such as audio data, a phone book, etc.), etc. In addition, the internal memory 521 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), etc.

[0068] The charging management module 540 is used to receive charging input from a wired charger. For example, the charging management module 540 can receive charging input from a wired charger through a USB interface. The charging management module 540 can also receive wireless charging input through a wireless charging receiver 543 of the electronic device 500. The charging management module 540 can charge the battery 542 while also supplying power to the electronic device 500 through the power management module 541.

[0069] The power management module 541 is configured to connect the battery 542 and the charging management module 540 to the processor 510. The power management module 541 receives input from the battery 542 and / or the charging management module 540 to supply power to the processor 510, the internal memory 521, the external memory, the display 560, the wireless communication module 570, and the like. In some embodiments, the power management module 541 can also be disposed in the processor 510. In some embodiments, the power management module 541 and the charging management module 540 can also be disposed in the same device.

[0070] The wireless charging receiver 543 includes a receiving coil 544, a resonance circuit 545, and a rectifier circuit 546. When the electronic device 500 is in an alternating magnetic field, the receiving coil 544 obtains a high-frequency alternating voltage through electromagnetic induction, transmits the high-frequency alternating voltage to the resonance circuit 545, the resonance circuit 545 outputs a resonated high-frequency alternating voltage, and the rectifier circuit 546 rectifies the resonated high-frequency alternating voltage to a direct-current voltage to charge the battery 542. The receiving coil 544 can be integrated in an Rx chip.

[0071] The wireless communication function of the electronic device 500 can be implemented by the antenna 51, the antenna 52, the mobile communication module 550, the wireless communication module 570, a modem processor, and a baseband processor, and the like.

[0072] The antenna 51 and the antenna 52 are configured to transmit and receive electromagnetic wave signals. Each antenna in the electronic device 500 can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization rate of the antennas. For example, the antenna 51 can be multiplexed as a diversity antenna for a wireless local area network. In some embodiments, the antennas can be used in combination with a tuning switch.

[0073] The mobile communication module 550 can provide a solution including 2G / 3G / 4G / 5G wireless communication applied to the electronic device 500. The mobile communication module 550 can include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), and the like. The mobile communication module 550 can receive electromagnetic waves from the antenna 52, and perform filtering, amplification, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to a modem processor for demodulation. The mobile communication module 550 can also amplify signals modulated by the modem processor, and convert the amplified signals into electromagnetic waves to be radiated through the antenna 52. In some embodiments, at least part of the function modules of the mobile communication module 550 can be disposed in the processor 510. In some embodiments, at least part of the function modules of the mobile communication module 550 and at least part of the modules of the processor 510 can be disposed in the same device.

[0074] The wireless communication module 570 can provide a solution for wireless communication, including wireless local area networks (WLAN) (e.g., wireless fidelity (Wi-Fi) network), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) technology, etc., which are applied to the electronic device 500. The wireless communication module 570 can be one or more devices that integrate at least one communication processing module. The wireless communication module 570 receives electromagnetic waves via the antenna 51, frequency-modulates and filters the electromagnetic wave signals, and transmits the processed signals to the processor 510. The wireless communication module 570 can also receive signals to be transmitted from the processor 510, frequency-modulate them, amplify them, and radiate them as electromagnetic waves via the antenna 51.

[0075] In some embodiments, the antenna 52 of the electronic device 500 and the mobile communication module 550 are coupled, and the antenna 51 and the wireless communication module 570 are coupled, so that the electronic device 500 can communicate with other devices through a network by using a wireless communication technique. The wireless communication technique can include a global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR techniques, etc. The GNSS can include a global positioning system (GPS), a global navigation satellite system (GLONASS), a beidu navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and / or a satellite based augmentation systems (SBAS).

[0076] The electronic device 500 implements a display function through a GPU, a display 560, and an application processor, etc. The GPU is a microprocessor for image processing, which is connected to the display 560 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 510 can include one or more GPUs, which execute program instructions to generate or change display information.

[0077] The display screen 560 is configured to display images, videos, and the like. The display screen 560 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flex light-emitting diode (FLED), a Miniled, a MicroLed, a Micro-OLED, a quantum dot light emitting diodes (QLED), or the like.

[0078] The keys 530 can include a power key, a volume key, a zoom key, and the like. The keys 530 can be mechanical keys or touch keys.

[0079] Referring to Figure 3 , Figure 3 for the wireless charging base 100 shown in Figure 1 FIG. 1 is a schematic diagram of a wireless charging base 100. The wireless charging base 100 can include a processor 110, an internal memory 140, keys 130, a wireless charging transmitting unit 150, and a wireless communication unit 160.

[0080] The processor 110 can include one or more processing units. For example, the processor 110 can include a controller, a memory, a modem, and the like. Different processing units can be independent devices or integrated in one or more processors. The controller in the processor 110 can be the nerve center and command center of the wireless charging base 100. The controller can generate operation control signals according to instruction operation codes and timing signals to complete the control of fetching and executing instructions. In some embodiments, when the wireless charging base 100 charges the same electronic device 500 with different transmitting coils 154, the controller can allocate the charging rated power according to a preset algorithm. In some embodiments, when the wireless charging base 100 wirelessly charges multiple electronic devices 500, the controller can allocate the charging rated power according to a preset algorithm. The memory in the processor 110 can be configured to store instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory can save instructions or data that the processor 110 has just used or repeatedly uses. If the processor 110 needs to use the instructions or data again, it can directly call from the memory. This avoids repeated access and reduces the waiting time of the processor 110, thereby improving the efficiency of the system.

[0081] In some embodiments, the processor 110 can include one or more interfaces. The interfaces are used to couple the internal memory 140, the wireless charging transmitting unit 150, the wireless communication unit 160, and the like.

[0082] The internal memory 140 can be used to store computer executable program codes, the executable program codes including instructions. The processor 110 performs various functional applications of the wireless charging base 100 and data processing by running the instructions stored in the internal memory 140. The internal memory 140 can include a program storage area and a data storage area. The program storage area can store an operating system. The data storage area can store data created during the use of the wireless charging base 100 (for example, the rated charging power of the electronic device 500, the current power value of the electronic device 500, and the like). In addition, the internal memory 140 can include a high-speed random access memory, and can further include a non-volatile memory, for example, at least one of a magnetic disk storage device, a flash memory device, a universal flash storage (UFS), and the like.

[0083] The wireless charging transmitting unit 150 includes a rectifier circuit (RC) 151, an inverter circuit (IC) 152, a resonance circuit 153, and a plurality of transmitting coils 154. The wireless charging transmitting unit 150 is connected to an alternating current voltage (AC) through a wired charger (also referred to as a power adapter), and the rectifier circuit 151 is used to convert the alternating current voltage into a direct current voltage, and the inverter circuit 152 is used to convert the alternating current voltage into a high-frequency AC. The resonance circuit 153 receives the high-frequency alternating current voltage output by the inverter circuit 152 and transmits the high-frequency alternating current voltage to the transmitting coils 154. As a result, the transmitting coils 154 generate an alternating electromagnetic field through a high-frequency alternating current in the transmitting coils 154. When the electronic device 500 is in the alternating electromagnetic field of the transmitting coils 154, the receiving coil 544 in the electronic device 500 generates an induced current through electromagnetic induction. The frequency of the high frequency generally refers to a frequency of 87 KHz or more. For example, the inverter circuit 152 can be integrated in a Tx chip. The rectifier circuit 151 can be integrated in a charging drive chip. For another example, the inverter circuit 152 and the rectifier circuit 151 can be integrated in one chip.

[0084] The wireless charging station 100 and the electronic device 500 perform wireless power transmission based on the Qi protocol. Before the wireless charging station 100 transmits wireless power to the electronic device 500, wireless communication needs to be established between the two. Specifically, the wireless communication unit 160 can provide wireless local area networks (WLAN), Bluetooth (BT), global navigation satellite system (GNSS), near field communication technology (NFC), infrared technology (IR), and other wireless communication solutions applied to the wireless charging station 100. For example, the above-mentioned WLAN can be a (wireless fidelity, Wi-Fi) network. The wireless communication unit 160 can wirelessly communicate with the wireless communication module 570 in the electronic device 500. After the two successfully establish wireless communication, the wireless charging station 100 charges the electronic device 500. Among them, the process of wireless power transmission using the Qi protocol generally includes a ping phase (also called a handshake phase), an identification and configuration phase, and a power transmission phase. In the Qi protocol, after the wireless charging station 100 recognizes the signal strength packet returned by the electronic device 500 during the ping phase, wireless communication between the two is successfully established. The specific process and principles of wireless power transmission between the wireless charging station 100 and the electronic device 500 based on the Qi protocol are well known to those skilled in the art and will not be further described here.

[0085] To illustrate the specific structure of the wireless charging stand 100, please refer to Figures 4-6 , Figure 4 Based on Figure 1 The three-dimensional structure diagram of the wireless charging stand 100 is shown in FIG. Figure 5 Based on Figure 4 An exploded schematic diagram of the wireless charging stand 100 is shown; Figure 6 Based on Figure 4 The figure shows a cross-sectional structural diagram of a wireless charging station taken along line AA. Specifically, the wireless charging station 100 includes a housing 120, an impeller 170, multiple transmitting coils 154, a circuit board 180, and a switching control circuit (not shown). The multiple transmitting coils 154 include multiple first transmitting coils 1541. Multiple first transmitting coils 1541 refer to two or more first transmitting coils 1541.

[0086] Please continue reading Figure 5 and Figure 6The housing 120 has a containing space for containing the impeller 170, the plurality of transmitting coils 154, the circuit board 180, and the like. The shape of the housing 120 includes, but is not limited to, a cylinder, a cube, or a special shape. In the specific example shown in Figure 5 and Figure 6 , the housing 120 is formed in a cylindrical shape.

[0087] Please continue to refer to Figure 5 and Figure 6 , the housing 120 includes a first shell part 121 and a second shell part 122. The first shell part 121 and the second shell part 122 are connected by clamping, welding, screw connection, or the like. In this way, the first shell part 121 and the second shell part 122 can be machined separately, which is beneficial to simplify the mold structure and reduce the difficulty of machining and manufacturing.

[0088] Please continue to refer to Figure 5 , in some examples, the side of the first shell part 121 and the second shell part 122 facing each other is open to form a containing cavity, and the containing cavity of the first shell part 121 and the containing cavity of the second shell part 122 jointly define the containing space after the first shell part 121 and the second shell part 122 are matched. Of course, it can be understood that the containing space can also be defined by the containing cavity of the first shell part 121 or the second shell part 122 alone.

[0089] The material of the first shell part 121 includes, but is not limited to, hard plastic, metal, and a combination of plastic and metal. In order to realize the light weight of the wireless charging base 100 and improve the safety of the wireless charging base 100, the material of the first shell part 121 can be selected as hard plastic. The material of the second shell part 122 includes, but is not limited to, hard plastic, metal, and a combination of plastic and metal. In order to realize the light weight of the wireless charging base 100 and improve the safety of the wireless charging base 100, the material of the second shell part 122 can be selected as hard plastic.

[0090] Please continue to refer to Figure 5 and Figure 6 , the outer surface of the housing 120 has a charging area 123. The charging area 123 is used to place the electronic device 500 to be charged. For example, as shown in Figure 5 and Figure 6 , the charging area 123 is on the end face of the axial end of the housing 120. That is, the wall plate where the charging area 123 is located is on the axial side of the housing 120. Of course, it can be understood that in other examples, the charging area 123 can also be on the peripheral surface of the housing 120, or the charging area 123 includes two parts, and the two parts are respectively on the peripheral surface of the housing 120 and the end face of the axial end of the housing 120.

[0091] Please continue to refer to Figure 5In order to facilitate heat dissipation of the wireless charging base 100, the shell 120 has an air inlet 124 and an air outlet 125. Please continue to refer to Figure 5 In some embodiments, the air inlet 124 is on the peripheral wall of the shell 120. Of course, it can be understood that in other examples, the air inlet 124 can also be on the axial end wall plate of the shell 120. For example, the air inlet 124 and the charging area 123 are respectively on the axial end wall plates of the shell 120. Please continue to refer to Figure 5 In some embodiments, the air outlet 125 and the charging area 123 are on the same side surface of the shell 120. For example, the air outlet 125 and the charging area 123 are both arranged on the axial end wall plate of the shell 120. Since the electronic device 500 also generates heat during charging by using the wireless charging base 100, by arranging the air outlet 125 and the charging area 123 on the same side surface of the shell 120, it is beneficial for the airflow flowing out of the air outlet 125 to flow through the electronic device 500, thereby improving the heat dissipation effect on the electronic device 500.

[0092] On this basis, in order to prevent the problem of slow airflow flow rate of the electronic device 500 caused by covering the air outlet 125 during charging, the air outlet 125 includes a plurality of air outlet holes. Please continue to refer to Figure 5 The plurality of air outlet holes are arranged at intervals around the outer periphery of the charging area 123. In this way, on the one hand, it is beneficial to at least reduce the coverage area of the electronic device 500 on the air outlet 125 to a certain extent, and on the other hand, if the electronic device covers the air outlet 125, it is also beneficial to reduce the distance between the air outlet 125 and the outer peripheral edge of the electronic device 500, and to facilitate the airflow to flow out quickly between the wireless charging base 100 and the electronic device 500. Of course, it can be understood that the relative relationship between the air outlet 125 and the charging area 123 is not limited to this, and in other examples, the air outlet 125 and the charging area 123 can also be on the opposite two end surfaces of the shell 120. As long as the air inlet 124 and the air outlet 125 are spaced apart.

[0093] The circuit board 180 is fixed in the shell 120. Specifically, the circuit board 180 is fixed on the wall plate of the shell 120 opposite to the wall plate where the charging area 123 is located. For example, the circuit board 180 can be fixed in the shell 120 by welding, clamping, screwing or gluing. The processor 110, the internal memory 140, the wireless charging transmitting unit 150, the wireless communication unit 160 and the switching control circuit, etc. can be integrated on the circuit board 180. In this way, the circuit board 180 is used to realize the electrical connection between various electronic components inside the wireless charging base 100, and the circuit board 180 is used for signal control, data signal processing and other operations of the electronic components. For example, the switching control circuit can be integrated in the processor 110, for example, the switching control circuit is integrated in the controller. For another example, the switching control circuit can be independent of the controller or the processor, as long as it is electrically connected to the controller or the processor to realize signal transmission.

[0094] The circuit board 180 can be a hard circuit board, a flexible circuit board, or a combination of soft and hard circuit boards. For example, the circuit board 180 can use an FR-4 medium plate, a Rogers medium plate, a mixed medium plate of FR-4 and Rogers, etc. Here, FR-4 is a code for a fire-resistant material grade, and the Rogers medium plate is a high-frequency plate.

[0095] The circuit board 180 is provided with a power interface 182. The rectifier circuit 151 can be electrically connected to the power interface 182. The shell 120 is provided with a socket 126. The power interface 182 can be connected to a wired charger through the socket 126 to receive the charging input of the wired charger. For example, the power interface 182 can be any one of a Type-C interface, a Micro B interface or a POGO pin interface.

[0096] Please continue to refer to Figure 5 and Figure 6 The impeller 170 is rotatably arranged in the shell 120, and the rotation of the impeller 170 can drive the airflow outside the wireless charging base 100 to enter the shell 120 through the air inlet 124 and then be discharged from the air outlet 125, thereby achieving the purpose of heat dissipation. For example, the impeller 170 is located on the side of the circuit board 180 facing the charging area 123.

[0097] The axial direction of the impeller 170 (i.e. the extension direction of the rotation axis of the impeller 170) is consistent with the axial direction of the shell 120. For example, the rotation axis of the impeller 170 is collinear with the central axis of the shell 120. In this way, it can be determined that the impeller 170 is located in the middle region of the shell 120, thereby facilitating the compactness of the structure.

[0098] Please continue to refer to Figure 6 , and in combination with Figure 7 , Figure 7 is according to Figure 5 shown in the schematic view along the axial direction of the impeller 170. The impeller 170 includes a hub portion 171, blades 172, and a magnet 173.

[0099] The hub portion 171 is formed in a cylindrical shape. In an example, the axial direction of the hub portion 171 is consistent with the axial direction of the housing 120. The material of the hub portion 171 includes, but is not limited to, plastic, metal, or a combination of both.

[0100] In order to facilitate the rotational connection between the impeller 170 and the housing 120, in some examples, the wireless charging base 100 further includes a fixing support 190. The fixing support 190 is connected to the inner wall of the housing 120, and the fixing support 190 is located on the side of the circuit board 180 facing the charging area 123. In an example, the connection between the fixing support 190 and the housing 120 includes, but is not limited to, clamping, welding, gluing, or screw connection. Please continue to refer to Figure 6 , the hub portion 171 has a pivot slot 1711, and the fixing support 190 has a pivot shaft 191. The pivot slot 1711 of the hub portion 171 is rotationally matched with the pivot shaft 191 on the fixing support 190. Thus, the impeller 170 is rotatably fixed to the fixing support 190. In other examples, the hub portion 171 can also have a pivot shaft, and the fixing support 190 has a pivot slot matched with the pivot shaft of the hub portion 171. Of course, it can be understood that in other examples, the wireless charging base 100 can also not include the fixing support 190, but directly rotatably arrange the impeller 170 on the inner wall of the housing 120. For example, the circuit board 180 has an avoiding hole, the hub portion 171 has a pivot slot, and the wall plate opposite to the wall plate where the charging area 123 is located on the housing 120 is provided with a pivot shaft, which passes through the avoiding hole and is matched with the pivot slot of the hub portion 171.

[0101] The blades 172 are a plurality of. For example, the blades 172 are three or more. In an example, the blades 172 are eight. Figure 6 and Figure 7 The plurality of blades 172 are arranged at intervals on the outer periphery of the hub portion 171. In an example, the plurality of blades 172 are arranged at uniform intervals in the circumferential direction of the hub portion 171. The material of the blades 172 includes, but is not limited to, plastic, metal, or a combination of both.

[0102] In some embodiments, the blade 172 and the hub portion 171 are integrally formed, thereby facilitating to simplify the manufacturing process, to reduce the production cost, and to improve the connection reliability between the blade 172 and the hub portion 171. In other examples, the blade 172 and the hub portion 171 can be separately manufactured, and are connected by welding, bonding, clamping, or screwing, etc.

[0103] The magnet 173 can be a magnet or a magnetic steel. The magnet 173 is used to cooperate with the first transmitting coil 1541 to drive the impeller 170 to rotate. The specific implementation manner of the magnet 173 cooperating with the first transmitting coil 1541 to drive the impeller to rotate will be described below, and will not be described here.

[0104] Please continue to refer to Figure 7 In some embodiments, the magnet 173 can be arranged on the blade 172, Figure 7 The blade 172 with the filling pattern in FIG. 8 schematically shows the blade 172 provided with the magnet 173. As described below, since the plurality of first transmitting coils 1541 are arranged in a ring array with the rotation axis of the impeller 170 as the center line, by arranging the magnet 173 on the blade 172, it is beneficial to arrange the magnet 173 to deviate from the central axis of the hub portion 171, so as to facilitate the magnet 173 to be closer to the magnetic field center of the first transmitting coil 1541, thereby facilitating the cooperation between the magnet 173 and the first transmitting coil 1541 to drive the impeller 170 to rotate. Of course, in other examples, the magnet 173 can also be arranged on the hub portion 171. In the following description, the magnet 173 arranged on the blade 172 is taken as an example for description.

[0105] The magnet 173 can be fixed to the blade 172 by means of gluing, clamping, or screwing, etc. Of course, in other examples, the magnet 173 can also be connected with the blade 172 integrally by an in-mold injection process. In this way, the manufacturing process can be simplified, and the production cost can be reduced. Of course, it can be understood that in other examples, the magnet 173 can also be defined by the blade 172 in which the magnet 173 is located, that is, the blade 172 in which the magnet 173 is located itself has magnetism, that is, the blade 172 with magnetism is processed by a magnet or a magnetic steel.

[0106] In some embodiments, the magnet 173 is a plurality of magnets, and the plurality of magnets 173 are arranged on different blades 172, and the plurality of magnets 173 are uniformly spaced apart in the circumferential direction of the hub portion 171. In some embodiments, the number of magnets 173 can be different from the number of blades 172. For example, the number of blades 172 is a positive integer multiple of the number of magnets 173. For example, in the example shown in FIG. 8, the number of blades 172 is twice the number of magnets 173. Figure 7In the specific example shown, the number of magnets 173 is four, and each of the four magnets 173 is arranged on a different vane 172. In the circumferential direction of the hub portion 171, one vane 172 is arranged between two adjacent vanes 172 on which a magnet 173 is arranged. In other embodiments, the number of magnets 173 can be the same as the number of vanes 172, and each magnet 173 can be arranged on a different vane 172. The present application does not limit the relationship between the number of magnets 173 and the number of vanes 172, as long as each magnet 173 is arranged on a different vane 172, and the plurality of magnets 173 are arranged at uniform intervals in the circumferential direction of the hub portion 171.

[0107] The magnetization direction of each magnet 173 is the same as the arrangement direction of the end of the magnet 173 closer to the hub portion 171 and the end of the magnet 173 farther from the hub portion 171. Specifically, the end of the magnet 173 closer to the hub portion 171 is one of the N pole (north pole) and the S pole (south pole), and the end of the magnet 173 farther from the hub portion 171 is the other of the N pole and the S pole. To facilitate the cooperation of the magnet 173 and the first transmitting coil 1541 to drive the continuous rotation of the impeller 170, please refer to 7, the number of magnets 173 is even, the even number of magnets 173 are arranged at uniform intervals along the circumference of the hub portion 171, and in the two adjacent magnets 173, the direction from the N pole to the S pole of one of the magnets 173 points to the center axis of the hub portion 171, and the direction from the S pole to the N pole of the other magnet 173 points to the center axis of the hub portion 171. Of course, it can be understood that in other examples, the magnetization direction of the magnet 173 can also be consistent with the axial direction of the impeller 170, as long as the magnetization directions of the two adjacent magnets 173 in the plurality of magnets 173 are opposite in the circumferential direction of the hub portion 171, and the magnet 173 can cooperate with the first transmitting coil 1541 to drive the rotation of the impeller 170.

[0108] Please refer to Figure 5 and Figure 6 , a plurality of first transmitting coils 1541 are fixed in the shell 120. For example, the plurality of first transmitting coils 1541 can be fixed on the inner wall of the shell 120 by means of adhesion, clamping or welding. The structural form of the first transmitting coil 1541 includes but is not limited to two structural forms of planar coil and cylindrical coil. Among them, the planar coil refers to the structure formed by the spiral winding of the winding wire along the plane. The cylindrical coil refers to the structure formed by the spiral winding of the winding wire along the cylindrical surface.

[0109] Specifically, please refer to Figure 5 and Figure 6The first plurality of transmitting coils 1541 are planar coils, and the central axes of the first plurality of transmitting coils 1541 are parallel to the rotation axis of the impeller 170. It is worth noting that the central axis of the first transmitting coil 1541 is perpendicular to the winding direction of the first transmitting coil 1541. In this way, the space occupied by the first transmitting coil 1541 in the axial direction of the impeller 170 in the housing 120 can be reduced, thereby reducing the axial dimension of the housing 120, and further reducing the volume of the housing 120. Of course, it can be understood that in other examples, when the charging area 123 is on the outer peripheral surface of the housing 120 or the part of the charging area 123 opposite to the first plurality of transmitting coils 1541 is on the outer peripheral surface of the housing 120, the first plurality of transmitting coils 1541 are planar coils, and the central axis of the first transmitting coil 1541 can be perpendicular to the rotation axis of the impeller 170.

[0110] Each first transmitting coil 1541 can be used as a charging coil and a driving coil. That is, each first transmitting coil 1541 can have two working states, a charging working state for charging the electronic device 500 and a driving working state for cooperating with the magnet 173 to drive the impeller 170 to rotate. In the charging working state, the first transmitting coil 1541 is in charging matching with the receiving coil 544 of the electronic device 500, and in the driving working state, the first transmitting coil 1541 generates a driving magnetic field cooperating with the magnet 173 to drive the impeller 170 to rotate. For each first transmitting coil 1541, when the first transmitting coil 1541 is in the charging working state, the first transmitting coil 1541 is no longer in the driving working state. Similarly, when the first transmitting coil 1541 is in the driving working state, the first transmitting coil 1541 is no longer in the charging working state. Each first transmitting coil 1541 can be switched between the charging working state and the driving working state. The charging matching refers to that the relative position between the transmitting coil 154 and the receiving coil 544 meets a certain condition, under which the receiving coil 544 and the transmitting coil 154 can successfully implement wireless communication, and the magnetic lines of the alternating magnetic field generated by the transmitting coil 154 when the alternating current is applied can enter the receiving coil 544 along the axial direction of the receiving coil 544 to generate an induced current in the receiving coil 544 to charge the electronic device 500.

[0111] To enable each first transmitting coil 1541 to function as both a charging coil and a driving coil, each first transmitting coil 1541 is specifically configured as an independent coil winding. Multiple first transmitting coils 1541 are positioned opposite different areas of the charging area 123. Furthermore, the multiple first transmitting coils 1541 are arranged in a circular array with the rotation axis of the impeller 170 as the centerline. In other words, the multiple first transmitting coils 1541 are distributed in a circular array, and the central axis of the arrangement of the multiple first transmitting coils 1541 is collinear with the rotation axis of the impeller 170. A switching control circuit 181 is electrically connected to each first transmitting coil 1541 to control the switching of each first transmitting coil 1541 between a charging state and a driving state.

[0112] Specifically, since each first transmitting coil 1541 is an independent coil winding, each of the multiple first transmitting coils 1541 can be individually controlled by the switching control circuit, allowing the first transmitting coils 1541 to switch between a charging state for charging the electronic device 500 and a driving state for driving the impeller 170. It should be understood that each first transmitting coil 1541 being an independent coil winding means that each first transmitting coil 1541 corresponds to an inner core, and each first transmitting coil 1541 can be wound around a corresponding inner core. The inner core can be an insulating core or a magnetic core, and is not specifically limited here. The magnetic core refers to a sintered magnetic metal oxide composed of a mixture of various iron oxides, which can increase the magnetic flux density (i.e., magnetic flux) of the coil magnetic circuit and reduce losses. In some embodiments, the inner core is a ferrite core. Ferrite cores are easy to magnetize and demagnetize, resulting in a faster response time for initiating and canceling charging, facilitating charging control.

[0113] On this basis, see Figure 8 , Figure 8 This application provides some schematic diagrams of charging scenarios of the wireless charging system 1000. Figure 8 In the specific example shown, there are four first transmitting coils 1541, namely, first transmitting coil 1541A, first transmitting coil 1541B, first transmitting coil 1541C, and first transmitting coil 1541D. Since first transmitting coil 1541A, first transmitting coil 1541B, first transmitting coil 1541C, and first transmitting coil 1541D are respectively opposite to different areas of charging area 123, when a user places electronic device 500 in charging area 123, receiving coil 544 of electronic device 500 is often located at different positions in charging area 123, and thus receiving coil 544 corresponds to different first transmitting coils 1541. Figure 8As shown in (a) of FIG. 1 , the receiving coil 544 only overlaps with the first transmitting coil 1541A in the charging area 123 and does not overlap with other first transmitting coils 1541. Figure 8 As shown in (b) of FIG. 1 , the receiving coil 544 overlaps with the first transmitting coil 1541A and the first transmitting coil 1541D in the charging area 123, but does not overlap with any other first transmitting coils 1541. Figure 8 As shown in (c) of FIG. 5 , the receiving coil 544 overlaps with the first transmitting coil 1541A, the first transmitting coil 1541B, and the first transmitting coil 1541D, but does not overlap with the first transmitting coil 1541C. Figure 8 As shown in (d) of FIG, the receiving coil 544 overlaps with the first transmitting coil 1541A, the first transmitting coil 1541B, the first transmitting coil 1541C, and the first transmitting coil 1541D. This shows that when the user places the electronic device 500 in different areas of the charging area 123, the receiving coil 544 of the electronic device 500 may overlap with different first transmitting coils 1541, or may not overlap at all. Furthermore, when the receiving coil 544 overlaps with one first transmitting coil 1541, or with two or more first transmitting coils 1541, the overlapping areas may vary in size. Therefore, the multiple first transmitting coils 1541 are respectively opposite to different areas of the charging area 123. When the electronic device 500 is placed in different areas of the charging area 123 and the receiving coil 544 of the electronic device 500 is opposite to different areas of the charging area 123, it is beneficial to use different first transmitting coils 1541 as charging coils, that is, it is beneficial to use different first transmitting coils 1541 to match the receiving coil 544 of the electronic device 500 for charging to charge the electronic device 500, thereby improving the charging freedom of the wireless charging stand 100 for charging the electronic device 500.

[0114] Please continue reading Figure 5 and Figure 6 Because the multiple first transmitting coils 1541 are arranged in a circular array with the rotation axis of the impeller 170 as the centerline, this facilitates the formation of a rotating magnetic field for driving the impeller 170 to rotate, thereby achieving continuous rotation of the impeller 170. It should be noted that the multiple first transmitting coils 1541 can be completely separated or allowed to have some overlap, as long as more than half of the area of ​​each first transmitting coil 1541 does not overlap with other first transmitting coils 1541.

[0115] Since the switching control circuit 181 can control the working state of each first transmitting coil 1541, each first transmitting coil 1541 is switched between the driving working state and the charging working state, so that the first transmitting coil 1541 has the functions of the charging coil and the driving coil. When the first transmitting coil 1541 works in the charging working state, it can be used for charging matching with the electronic device 500 to charge the electronic device 500. When the first transmitting coil 1541 is in the driving working state, it can drive the impeller 170 to rotate, so that the driving coil winding in the related art can be omitted, which is helpful to save cost and reduce the volume of the wireless charging base 100.

[0116] It can be understood that when the first transmitting coil 1541 works in the charging working state, the voltage of the first transmitting coil 1541 is a high-frequency voltage, for example, the frequency is above 87Khz, and further, the frequency is between 87Khz and 205Khz. When the first transmitting coil 1541 works in the driving working state, the voltage of the first transmitting coil 1541 is a low-frequency voltage. The frequency of the low-frequency voltage is much smaller than that of the high-frequency voltage. For example, the frequency of the low-frequency voltage is 0-100Hz, and further, the frequency is between 50Hz and 70Hz, or between 50Hz and 65Hz, or between 50Hz and 60Hz. Since the frequency difference of the first transmitting coil 1541 in the two working states is relatively large. Therefore, in the plurality of first transmitting coils 1541, even if one or several first transmitting coils 1541 work in the charging working state, the rest of the first transmitting coils 1541 work in the driving working state, the interference between them is relatively small, even without.

[0117] To reduce the distance between the first transmitting coil 1541 and the charging area 123, increase the coupling coefficient between the first transmitting coil 1541 and the receiving coil 544 of the electronic device 500, and thereby improve charging efficiency, multiple first transmitting coils 1541 are located on the side of the impeller 170 closer to the charging area 123 along the axial direction of the impeller 170. This facilitates the use of the impeller 170 to separate the first transmitting coil 1541 from the circuit board 180, thereby at least partially reducing electromagnetic interference between the first transmitting coil 1541 and the circuit board 180. Exemplarily, the multiple first transmitting coils 1541 are fixed to the wall panel where the charging area 123 is located. This shortens the distance between the multiple first transmitting coils 1541 and the charging area 123, thereby increasing the coupling coefficient between the first transmitting coil 1541 and the receiving coil 544 of the electronic device 500, thereby improving charging efficiency for the electronic device 500. In other examples, the wireless charging stand 100 also includes a coil mounting bracket. The coil fixing frame is fixed in the housing 120 , and the plurality of first transmitting coils 1541 can be fixed on the coil fixing frame.

[0118] In order to further increase the magnetic flux density (that is, the magnetic flux) of the magnetic circuit of the first transmitting coil 1541, reduce losses, and improve charging efficiency. In some embodiments, the wireless charging stand 100 also includes a first magnetic conductive plate 111. Along the axial direction of the impeller 170, the first magnetic conductive plate 111 is arranged on the side of the impeller 170 away from the charging area 123. And the orthographic projections of the multiple first transmitting coils 1541 on the first magnetic conductive plate 111 are located within the first magnetic conductive plate 111. Specifically, the first magnetic conductive plate 111 is located between the impeller 170 and the circuit board 180. In this way, the impeller 170 and the first magnetic conductive plate 111 can be used to separate the first transmitting coil 1541 and the circuit board 180, thereby reducing the electromagnetic interference between the first transmitting coil 1541 and the circuit board 180. Exemplarily, the first magnetic conductive plate 111 is arranged perpendicular to the rotation axis of the impeller 170. The first magnetic conductive plate 111 is made of ferrite. Ferrite is easily magnetized and demagnetized. Therefore, the response speed of starting and canceling charging is fast, which is beneficial to charging control.

[0119] In order to realize the control of each first transmitting coil 1541 by the switching control circuit 181, please refer to Figure 9 , Figure 9 Based on Figure 5The switching control circuit 181 of the wireless charging base 100 is electrically connected to the first transmitting coil 1541. As shown in FIG. 4, the switching control circuit 181 is electrically connected to four first transmitting coils 1541. The wireless charging base 100 includes a charging circuit and a power supply circuit connected in parallel, and a position detection device 113. Specifically, during the process that the first transmitting coil 1541 cooperates with the magnet 173 to drive the impeller 170 to rotate, the position of the magnet 173 relative to the position detection device 113 changes periodically. The position detection device 113 can detect the magnetic pole position signal of the magnet 173 according to the periodic change of the position of the magnet 173. When different magnetic poles of the magnet 173 are close to the position detection device 113, the position detection device 113 can detect different magnetic pole position signals. For example, the position detection device 113 is a Hall sensor.

[0120] The charging circuit includes an inverter circuit 152. Each first transmitting coil 1541 is electrically connected to the inverter circuit 152 through two first switches 154a. The two ends of each first transmitting coil 1541 are respectively connected to the input end of the inverter circuit 152 and the output end of the inverter circuit 152 through the first switches 154a. The inverter circuit 152 is used to convert a low-frequency direct-current voltage into a high-frequency alternating-current voltage. The inverter circuit 152 can be connected to the power interface 182 through the rectifier circuit 151. The power supply circuit includes a driving chip 114. The driving chip 114 can be connected to the power interface 182 to receive the alternating-current input of the power interface 182. Each first transmitting coil 1541 is electrically connected to the driving chip 114 through two second switches 154b. The two ends of each first transmitting coil 1541 are respectively connected to the input end of the driving chip 114 and the output end of the driving chip 114 through the second switches 154b. The switching control circuit 181 is electrically connected to the first switches 154a and the second switches 154b, so as to control the opening and closing of the first switches 154a and the second switches 154b. That is, the switching control circuit 181 can control the opening and closing of the two first switches 154a and the two second switches 154b corresponding to each first transmitting coil 1541.

[0121] Specifically, taking one of the first transmitting coils 1541 as an example, when the one of the first transmitting coils 1541 successfully establishes wireless communication with the receiving coil 544 of the electronic device 500, the switching control circuit 181 controls the two first switches 154a corresponding to the one of the first transmitting coils 1541 to be closed while controlling the two second switches 154b corresponding to the one of the first transmitting coils 1541 to be opened, so that the one of the first transmitting coils 1541 works in the charging working state. At this time, the inverter circuit 152 can output a high-frequency voltage to the one of the first transmitting coils 1541, and the one of the first transmitting coils 1541 generates an alternating electromagnetic field based on the high-frequency voltage to charge the electronic device 500. When it is needed to drive the impeller 170 to rotate by cooperating with the magnet 173 by using the one of the first transmitting coils 1541, the switching control circuit 181 controls the two second switches 154b corresponding to the one of the first transmitting coils 1541 to be closed while controlling the two first switches 154a corresponding to the one of the first transmitting coils 1541 to be opened, so that the one of the first transmitting coils 1541 works in the driving working state, and in the process of rotating the impeller 170, the magnetic pole position signal of the magnet 173 periodically changes, and the driving chip 114 applies a low-frequency alternating voltage to the one of the first transmitting coils 1541 based on the magnetic pole position signal of the magnet 173 detected by the position detection device 113, so that the magnetic field direction in the one of the first transmitting coils 1541 can be alternately changed to cooperate with the magnet 173 to drive the impeller 170 to continuously rotate.

[0122] The embodiments of the present application do not specifically limit the specific implementation form of the inverter circuit 152, for example, it can be a full-bridge or a half-bridge, in addition, the inverter circuit 152 can be a bidirectional power conversion circuit, which are not specifically limited. It is worth noting that the driving chip 114 is composed of power electronic devices and integrated circuits, etc., and the power electronic devices can include an inverter bridge. The driving chip 114 can receive the magnetic pole signal detected by the position detection device 113 to control the on-off of each power tube of the inverter bridge, etc. The specific structure of the driving chip 114 is well known to those skilled in the art, which will not be described in detail here.

[0123] Through the above analysis, it can be known that through the control of the switching control circuit 181 on the first switch 154a and the second switch 154b, the first transmitting coil 1541 can have the functions of the charging coil and the driving coil, when the first transmitting coil 1541 works in the charging working state, it can be matched with the electronic device 500 for charging to charge the electronic device 500, when the first transmitting coil 1541 works in the driving working state, it can drive the impeller 170 to rotate, so that the driving coil winding in the related art can be omitted, which is beneficial to save cost and reduce the size of the wireless charging base 100.

[0124] Please continue to refer to Figure 9 The charging signal input end of each first transmitting coil 1541 is connected with a corresponding first switch 154a, and a resonance circuit 153 is connected between the charging signal input end of each first transmitting coil 1541 and the corresponding first switch 154a. In this way, the charging efficiency can be improved.

[0125] It should be understood that before the wireless charging base 100 is powered on and successfully establishes wireless communication with any electronic device 500, the switching control circuit 181 can control all the first switches 154a to be closed, so that the plurality of first transmitting coils 1541 transmits a power detection broadcast to detect whether there is an electronic device 500 to be charged in the surrounding environment, so as to establish wireless communication with the electronic device 500.

[0126] On this basis, in some embodiments of the present application, the switching control circuit 181 is configured to control at least one of the plurality of first transmitting coils 1541 to work in the charging working state, and control the remaining first transmitting coils 1541 to work in the driving working state. It can be understood here that "the switching control circuit 181 controls at least one of the plurality of first transmitting coils 1541 to work in the charging working state, and controls the remaining first transmitting coils 1541 to work in the driving working state" at least includes: the switching control circuit 181 controls at least one of the plurality of first transmitting coils 1541 to work in the charging working state while controlling the remaining first transmitting coils 1541 to work in the driving working state; also includes: the switching control circuit 181 controls at least one of the plurality of first transmitting coils 1541 to work in the charging working state while controlling the remaining first transmitting coils 1541 to work in the driving working state, and so on.

[0127] In some examples, when the electronic device 500 is placed in the charging area 123, there are cases where some or all of the first transmission coils 1541 in the plurality of first transmission coils 1541 can successfully establish wireless communication with the receiving coil 544. However, due to the different relative positional relationships between these first transmission coils 1541 and the receiving coil 544 of the electronic device 500, the coupling coefficients between different first transmission coils 1541 and the receiving coil 544 are different. The greater the coupling coefficient, the higher the charging efficiency of the first transmission coil 1541 on the electronic device 500. The smaller the coupling coefficient, the lower the charging efficiency of the first transmission coil 1541 on the electronic device 500. Since the coupling coefficient is related to the overlapping area of the first transmission coil 1541 and the receiving coil 544, the greater the overlapping area of the first transmission coil 1541 and the receiving coil 544 in the charging area 123, the more magnetic field lines generated by the first transmission coil 1541 can pass through the receiving coil 544, the higher the coupling coefficient between them, and the smaller the overlapping area of the first transmission coil 1541 and the receiving coil 544 in the charging area 123, the fewer magnetic field lines generated by the first transmission coil 1541 can pass through the receiving coil 544, the lower the coupling coefficient between them. Therefore, in order to ensure the charging efficiency of the electronic device 500 and avoid waste of electric energy, please continue to refer to Figure 9 , and in combination with Figure 10 , Figure 10 based on Figure 9The wireless charging base 100 is shown in the charging process schematic diagram. The switching control circuit 181 can control one of the plurality of first transmitting coils 1541 to work in the charging working state to match the receiving coil 544 of the electronic device 500 for charging, and the switching control circuit 181 can control the remaining first transmitting coils 1541 to work in the driving working state to cooperate with the magnet 173 to generate a rotating magnetic field for driving the impeller 170 to rotate. Wherein, in the plurality of first transmitting coils 1541 in the orthographic projection of the charging area 123, the one of the first transmitting coils 1541 in the orthographic projection of the charging area 123 and the receiving coil 544 of the electronic device 500 in the orthographic projection of the charging area 123 has the maximum overlapping area, so that the first transmitting coil 1541 with the highest charging efficiency can be used to charge the electronic device 500. And it can be understood that when the electronic device 500 is placed at the current position of the charging area 123, only one first transmitting coil 1541 can be coupled with the receiving coil 544 of the electronic device 500, then the switching control circuit 181 controls the first transmitting coil 1541 to match the receiving coil 544 of the electronic device 500 for charging. Of course, it can be understood that in other examples, the switching control circuit 181 can also control several first transmitting coils 1541 with the largest overlapping area with the receiving coil 544 in the charging area 123 to work in the charging working state, or control the first transmitting coils 1541 that successfully establish wireless communication with the receiving coil 544 to work in the charging working state.

[0128] On this basis, please continue to refer to Figure 9 and Figure 10The wireless charging base 100 further comprises at least one temperature detecting device 183. Exemplarily, the temperature detecting device 183 is a temperature sensor. The temperature detecting device 183 is configured to detect the temperature of the charging area 123. The switching control circuit 181 is electrically connected with the temperature detecting device 183. The switching control circuit 181 is configured to control the remaining first transmitting coils 1541 to cooperate with the magnet 173 to generate the rotating magnetic field for driving the impeller 170 to rotate only when the current temperature of the charging area 123 detected by the temperature detecting device 183 is greater than or equal to the preset threshold. That is, after the switching control circuit 181 controls at least one of the first transmitting coils 1541 to charge match with the receiving coil 544 of the electronic device 500, and before the temperature detecting device 183 detects that the current temperature of the charging area 123 is greater than or equal to the preset threshold, the switching control circuit 181 always controls the remaining first transmitting coils 1541 to be in the non-working state. When the temperature detecting device 183 detects that the current temperature of the charging area 123 is greater than or equal to the preset threshold, the switching control circuit 181 controls the remaining first transmitting coils 1541 to work in the driving working state to cooperate with the magnet 173. In this way, on the one hand, it is beneficial to improve the heat dissipation effect of the wireless charging base 100, and on the other hand, it can also prevent the waste of electric quantity caused by the low temperature of the charging area 123 or the over-high temperature of the charging area 123 due to charging in cold seasons, and is beneficial to ensure the charging efficiency.

[0129] Exemplarily, in the charging area 123, the temperature of the area opposite to the first transmitting coil 1541 for charging is higher than that of other areas, and therefore, in order to improve the accuracy of detection of the temperature detecting device 183, the temperature detecting device 183 can be multiple, and the multiple temperature detecting devices 183 are arranged at intervals to respectively detect the temperature of the area of the charging area 123 opposite to different first transmitting coils 1541. That is, the orthographic projection of each first transmitting coil 1541 in the charging area 123 overlaps with the orthographic projection of at least one temperature detecting device 183. The switching control circuit 181 is configured to control the remaining first transmitting coils 1541 to cooperate with the magnet 173 when the temperature of the charging area 123 detected by at least one of the multiple temperature detecting devices 183 is greater than or equal to the preset threshold. Of course, it can be understood that in other examples, the temperature detecting device 183 can also be one, and the temperature detecting device is located at the position of the central axis of the multiple first transmitting coils 1541.

[0130] In some other embodiments, the wireless charging base 100 further comprises a timer (not shown in the figure). The switching control circuit 181 is electrically connected with the timer. The timer is configured to start timing when the switching control circuit 181 controls at least one of the first transmitting coils 1541 to be in the charging matching state with the receiving coil 544 of the electronic device 500, so as to detect the charging duration of the at least one of the first transmitting coils 1541 in the charging matching state with the receiving coil 544 of the electronic device 500. The switching control circuit 181 is configured to control the remaining first transmitting coils 1541 to be in the driving working state only when the charging duration is greater than or equal to a preset duration. That is, after the switching control circuit 181 controls at least one of the first transmitting coils 1541 to be in the charging matching state with the receiving coil 544 of the electronic device 500, and before the charging duration reaches the preset duration, the switching control circuit 181 always controls the remaining first transmitting coils 1541 to be in the non-working state. When the charging duration reaches the preset threshold, the switching control circuit 181 controls the remaining first transmitting coils 1541 to be in the driving working state. In this way, on the one hand, it is beneficial to improve the heat dissipation effect of the wireless charging base 100, and on the other hand, it can also prevent the waste of power caused by the relatively low temperature of the charging area 123 or the charging area 123 not being too high due to charging in cold seasons. Of course, it can be understood that in other examples, in order to simplify the control of the wireless charging base 100, the temperature detection device 183 and the timer can also not be provided in the wireless charging base 100. While the switching control circuit 181 controls at least one of the first transmitting coils 1541 to be in the charging matching state with the receiving coil 544 of the electronic device 500, the switching control circuit 181 controls the remaining first transmitting coils 1541 to cooperate with the magnets 173 to generate a driving magnetic field for driving the impeller 170 to rotate.

[0131] In some embodiments of the present application, the wireless charging base 100 has a charging mode and a heat dissipation mode. The switching control circuit 181 is configured to control at least one of the first transmitting coils 1541 in the charging mode to work in the charging working state. And in the heat dissipation mode, all the first transmitting coils 1541 work in the driving working state. Specifically, the switching control circuit 181 controls at least one of the first transmitting coils 1541 in the charging mode to work in the charging working state, so as to enter the charging mode. During the charging process, when the temperature of the charging area 123 is high and needs to be dissipated, the switching control circuit 181 can control the first transmitting coil 1541 matched with the receiving coil 544 of the electronic device 500 to exit the charging working state, i.e. the wireless charging base 100 exits the charging mode. And, all the first transmitting coils 1541 work in the driving working state to cooperate with the magnet 173 to generate a rotating magnetic field for driving the impeller 170 to rotate, so as to make the wireless charging base 100 enter the heat dissipation mode. In this way, the wireless charging base 100 only works in a single mode, which can improve the reliability of the wireless charging base 100. For example, the switching control circuit 181 is configured to control at least one of the first transmitting coils 1541 matched with the receiving coil 544 of the electronic device 500 to exit the charging working state when the temperature of the charging area 123 detected by the temperature detection device 183 is greater than or equal to a preset threshold. And, all the first transmitting coils 1541 work in the driving working state to cooperate with the magnet 173 to generate a rotating magnetic field for driving the impeller 170 to rotate, so as to make the wireless charging base 100 enter the heat dissipation mode.

[0132] The principle of the cooperation between the first transmitting coil 1541 and the magnet 173 for driving the impeller 170 to rotate will be described in different examples as follows.

[0133] Example 1

[0134] Please refer to Figure 11 , Figure 11 for the schematic diagram of the cooperation between the first transmitting coil 1541 and the magnet 173 for driving the impeller 170 to rotate in the wireless charging base 100 shown in Figure 5 Figure 11 (a) to Figure 11 ​The magnetic pole direction of the first transmitting coil 1541, indicated by (h), is along the axial direction of the first transmitting coil 1541 and on the side closest to the impeller 170. There are four magnets 173 on the impeller 170, evenly spaced circumferentially around the impeller 170, and are magnets 173A, 173B, 173C, and 173D, respectively. There are four first transmitting coils 1541, and they are first transmitting coil 1541A, first transmitting coil 1541B, first transmitting coil 1541C, and first transmitting coil 1541D, respectively. There is one position detection device 113. For example, the position detection device 113 can be located on the axial side of the first transmitting coil 1541A, close to the magnet 173, or in any other location, as long as it can detect the magnetic pole position signal of the magnet 173. In Example 1, the first transmitting coil D is used as a charging coil, and the first transmitting coil 1541A, the first transmitting coil 1541B, and the first transmitting coil 1541C are used as driving coils.

[0135] like Figure 11 As shown in (a) of FIG. 1 , the magnetic pole direction of the end of the first transmitting coil 1541A close to the impeller 170 is the north pole. The magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is the south pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is the north pole. At this time, the four magnets 173 cooperate with the three first transmitting coils 1541 to drive the impeller 170 to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 11 In (b), the position detection device 113 senses the magnetic pole position signal of the magnet 173A on the impeller 170 and transmits the magnetic pole position signal to the driver chip 114. The driver chip 114 applies a low-frequency AC voltage to the three first transmitting coils 1541, causing the direction of the magnetic field in the first transmitting coils 1541 to change, as shown in FIG. Figure 11 In (c), the magnetic pole direction of the end of the first transmitting coil 1541A close to the impeller 170 is the S pole, the magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is the N pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is the S pole. At this time, the four magnets 173 cooperate with the three first transmitting coils 1541 to continue to drive the impeller 170 to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 11 In (d) of FIG, the position detection device 113 senses the magnetic pole position signal of the magnet 173B on the impeller 170 and transmits the magnetic pole position signal to the driver chip 114. The driver chip 114 applies a low-frequency AC voltage to the three first transmitting coils 1541, causing the direction of the magnetic field in the three first transmitting coils 1541 to change, as shown in FIG. Figure 11(e) of FIG. 16A, the magnetic pole direction of the end of the first transmitting coil 1541 A close to the impeller 170 is N pole, the magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is S pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is N pole. At this time, the impeller 170 continues to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 11 (f) of FIG. 16A, the position detection device 113 senses the magnetic pole position signal of the magnet 173C on the impeller 170, and transmits the magnetic pole position signal to the driving chip 114. The driving chip 114 applies an alternating voltage of low frequency to the three first transmitting coils 1541, so that the magnetic field direction in the first transmitting coil 1541 changes as Figure 11 (g) of FIG. 16A, the magnetic pole direction of the end of the first transmitting coil 1541 A close to the impeller 170 is S pole, the magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is N pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is S pole. At this time, the impeller 170 continues to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 11 (h) of FIG. 16A, the position detection device 113 senses the magnetic pole position signal of the magnet 173D on the impeller 170, and transmits the magnetic pole position signal to the driving chip 114. The driving chip 114 applies an alternating voltage of low frequency to the three first transmitting coils 1541, so that the magnetic field direction in the first transmitting coil 1541 changes as Figure 11 (a) of FIG. 16A. At this time, the impeller 170 continues to rotate counterclockwise, and the impeller 170 rotates counterclockwise for one revolution. When the driving chip 114 continues to apply an alternating voltage of low frequency to the three first transmitting coils 1541, so that the magnetic field direction in the first transmitting coil 1541 changes as Figure 11 (a) to Figure 12 (h) of FIG. 16A, the impeller 170 can be periodically rotated. It can be understood that in other examples, when the four first transmitting coils 1541 are simultaneously used to drive the impeller 170 to rotate, the magnetic field change of the first transmitting coil 1541D is the same as that of the first transmitting coil 1541B.

[0136] Example Two

[0137] Please refer to Figure 12 , Figure 12Schematic diagrams illustrating how the first transmitting coil 1541 and magnet 173 cooperate to drive the impeller 170 to rotate in the wireless charging station 100 according to other embodiments of the present application. This example differs from Example 1 in that there are two magnets 173 on the impeller 170, namely magnet 173A and magnet 173B, and the two magnets 173 are symmetrically arranged relative to the rotation axis of the impeller 170. There are two position detection devices 113, namely position detection device 113A and position detection device 113B, respectively, and the two position detection devices 113 are located on one axial side of two adjacent first transmitting coils 1541. In Example 2, the first transmitting coil D is used as the charging coil, and the first transmitting coils 1541A, 1541B, and 1541C are used as the driving coils.

[0138] like Figure 12 As shown in (a) of FIG. 1 , the magnetic pole direction of the end of the first transmitting coil 1541A close to the impeller 170 is the north pole. The magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is the south pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is the north pole. At this time, the two magnets 173 cooperate with the three first transmitting coils 1541 to drive the impeller 170 to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 12 In (b), the position detection device 113A senses the magnetic pole position signal of the magnet 173A on the impeller 170 and transmits the magnetic pole position signal to the driver chip 114. The driver chip 114 applies a low-frequency AC voltage to the three first transmitting coils 1541, causing the direction of the magnetic field in the first transmitting coils 1541 to change, as shown in FIG. Figure 12 In (c), the magnetic pole direction of the end of the first transmitting coil 1541A close to the impeller 170 is the S pole, the magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is the N pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is the S pole. At this time, the two magnets 173 cooperate with the three first transmitting coils 1541 to continue to drive the impeller 170 to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 12 In (d) of FIG, the position detection device 113B senses the magnetic pole position signal of the magnet 173B on the impeller 170 and transmits the magnetic pole position signal to the driver chip 114. The driver chip 114 applies a low-frequency AC voltage to the three first transmitting coils 1541, causing the direction of the magnetic field in the three first transmitting coils 1541 to change, as shown in FIG. Figure 12(e) of FIG. 16A, the magnetic pole direction of the end of the first transmitting coil 1541 A close to the impeller 170 is N pole, the magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is S pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is N pole. At this time, the impeller 170 continues to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 12 (f) of FIG. 16A, the position detection device 113A senses the magnetic pole position signal of the magnet 173B on the impeller 170, and transmits the magnetic pole position signal to the driving chip 114. The driving chip 114 applies an alternating voltage of low frequency to the three first transmitting coils 1541, so that the magnetic field direction in the first transmitting coil 1541 changes as Figure 12 (g) of FIG. 16A, the magnetic pole direction of the end of the first transmitting coil 1541 A close to the impeller 170 is S pole, the magnetic pole direction of the end of the first transmitting coil 1541B close to the impeller 170 is N pole, and the magnetic pole direction of the end of the first transmitting coil 1541C close to the impeller 170 is S pole. At this time, the impeller 170 continues to rotate counterclockwise. When the impeller 170 rotates counterclockwise to Figure 12 (h) of FIG. 16A, the position detection device 113B senses the magnetic pole position signal of the magnet 173A on the impeller 170, and transmits the magnetic pole position signal to the driving chip 114. The driving chip 114 applies an alternating voltage of low frequency to the three first transmitting coils 1541, so that the magnetic field direction in the first transmitting coil 1541 changes as Figure 12 (a) of FIG. 16A. At this time, the impeller 170 continues to rotate counterclockwise, and the impeller 170 rotates counterclockwise for one revolution. When the driving chip 114 continues to apply an alternating voltage of low frequency to the three first transmitting coils 1541, so that the magnetic field direction in the first transmitting coil 1541 changes as Figure 13 (a) to Figure 13 (h) of FIG. 16A, the impeller 170 can be periodically rotated. It can be understood that in other examples, when the four first transmitting coils 1541 are simultaneously used to drive the impeller 170 to rotate, the magnetic field change of the first transmitting coil 1541D is the same as that of the first transmitting coil 1541B.

[0139] It is worth mentioning that the above examples one to two are examples of the cooperation of the first transmitting coil 1541 and the magnet 173 to drive the impeller 170 to rotate periodically, and cannot constitute a special limitation of the present application. In order to realize the periodic rotation of the impeller 170, the number of the first transmitting coil 1541, the number and position of the magnet 173 and the position detection device 113 can be set according to actual needs, and the present application does not make specific limitation. It can be understood that in order to realize the periodic rotation of the impeller 170, the number of the position detection device 113 is related to the number of the magnet 173 and the number of the first transmitting coil 1541, wherein the number of the position detection device 113 is the ratio of the number of the first transmitting coil 1541 to the number of the magnet 173.

[0140] In addition, in the driving process of the impeller 170, the more the number of the first transmitting coil 1541 and the number of the magnet 173, the better the driving effect corresponding to the continuous rotation of the impeller 170. Therefore, the number of the first transmitting coil 1541 can be four or more than four, and the number of the first transmitting coil 1541 is an even number, which is conducive to controlling the magnetic field direction of the adjacent two first transmitting coils 1541 to be opposite by using the driving chip 114, thereby facilitating the cooperation with the magnet 173 on the blade 172 to realize the continuous rotation of the impeller 170.

[0141] For example, the number of the first transmitting coil 1541 is greater than or equal to the number of the magnet 173, and the ratio of the number of the first transmitting coil 1541 to the number of the magnet 173 is a positive integer. In this way, it is conducive to ensuring the cooperation effect of the first transmitting coil 1541 and the magnet 173, and realizing the continuous rotation of the impeller 170. For example, the ratio of the number of the first transmitting coil 1541 to the number of the magnet 173 is 1, 2, 3 or 4.

[0142] On the basis of any of the above examples, the center axis of the plurality of first transmitting coils 1541 is on the same cylindrical surface, and the cylindrical surface where the center axis of the plurality of first transmitting coils 1541 is located is referred to as a reference cylindrical surface. The end of each magnet 173 away from the hub portion 171 is located on the reference cylindrical surface. In this way, it is conducive to increasing the magnetic field strength between the magnet 173 and the first transmitting coil 1541, thereby improving the driving force therebetween.

[0143] On the basis of any of the above examples, please refer to Figure 14 , Figure 14An exploded view of the wireless charging base 100 according to some embodiments of the present application. The plurality of transmitting coils 154 further comprises a second transmitting coil 1542. The second transmitting coil 1542 is fixed in the housing 120. In the axial direction of the impeller 170, the second transmitting coil 1542 is located at the side of the impeller 170 close to the charging area 123. Exemplarily, the second transmitting coil 1542 can be fixed on the inner wall of the housing 120 by means of gluing, clamping or welding, etc. For example, the second transmitting coil 1542 is fixed on the wall plate of the housing 120 where the charging area 123 is located. The second transmitting coil 1542 is opposite to the middle part of the charging area 123, that is, the orthographic projection of the second transmitting coil 1542 is located in the middle part of the charging area 123. And the plurality of first transmitting coils 1541 are arranged around the periphery of the second transmitting coil 1542. Since the user often places the electronic device 500 in the middle part of the charging area 123 when charging the electronic device 500 using the wireless charging base 100, even if the user places the electronic device 500 in a wrong position, the electronic device 500 generally will not deviate too much from the middle part of the charging area 123, ensuring that the electronic device 500 can be charged using the second transmitting coil 1542. Therefore, by arranging the second transmitting coil 1542 opposite to the middle part of the charging area 123, it can be ensured that when the user places the electronic device 500 in different positions of the charging area 123, the receiving coil 544 of the electronic device 500 and the second transmitting coil 1542 can both successfully establish wireless communication, and the second transmitting coil 1542 is used as the main transmitting coil 154 to charge the electronic device 500, and in combination with the first transmitting coil 1541 used as the auxiliary transmitting coil 154 to improve the charging efficiency. Exemplarily, when the switching control circuit 181 controls at least one first transmitting coil 1541 to work in the charging working state, the electronic device 500 simultaneously controls the second transmitting coil 1542 as a charging coil to match with the electronic device 500 for charging the electronic device 500.

[0144] It should be noted that the plurality of first transmitting coils 1541 arranged around the periphery of the second transmitting coil 1542 can mean that the cylindrical surface where the center lines of the plurality of first transmitting coils 1541 are located is outside the periphery of the second transmitting coil 1542. That is, the plurality of first transmitting coils 1541 and the second transmitting coil 1542 can be completely separated, or there can be some overlap, as long as the overlapping area of the first transmitting coil 1541 and the second transmitting coil 1542 is less than half of the area of each transmitting coil 154.

[0145] Please refer to Figure 13 , Figure 15 According to Figure 15The electric connection schematic diagram of the first transmitting coil 1541, the second transmitting coil 1542 and the switching control circuit in the wireless charging base shown. The two ends of the second transmitting coil 1542 are connected with the output end and the input end of the inverter circuit 152 respectively. Exemplarily, the second transmitting coil 1542 is connected with the output end of the inverter circuit 152 through the resonance circuit 153.

[0146] In some embodiments, referring to Figure 13 , ​ for the wireless charging base shown according to ​ The cross-sectional structure schematic diagram of the wireless charging base shown. The second transmitting coil 1542 is a planar coil. The central axis of the second transmitting coil 1542 is consistent with the extension direction of the rotation axis of the impeller 170. In this way, it is beneficial to reduce the size of the second transmitting coil 1542 in the axial direction of the impeller 170, and further reduce the thickness of the shell 120. Exemplarily, the central axis of the second transmitting coil 1542 is collinear with the rotation axis of the impeller 170.

[0147] In some embodiments, the orthographic projection of the plurality of first transmitting coils 1541 in the charging area 123 is located outside the orthographic projection of the second transmitting coil 1542 in the charging area 123. In this way, it is beneficial to weaken the mutual interference between the first transmitting coil 1541 and the second transmitting coil 1542 in operation.

[0148] In some embodiments, in order to further improve the magnetic flux density (that is, the magnetic flux) of the magnetic circuit of the second transmitting coil 1542, reduce the loss, and improve the charging efficiency, the wireless charging base 100 further includes a second magnetic conducting plate 112. The second magnetic conducting plate 112 is arranged between the second transmitting coil 1542 and the impeller 170. It can be understood that the second magnetic conducting plate 112 can also not be arranged. Exemplarily, the second magnetic conducting plate 112 is a ferrite, and the ferrite has the characteristics of easy magnetization and easy demagnetization, so the response speed of starting charging and canceling charging is fast, which is beneficial to charging control.

[0149] Specifically, the plurality of first transmitting coils 1541 are located on the side facing the outer peripheral surface of the second magnetic conducting plate 112. In this way, it can be prevented that the second magnetic conducting plate 112 interferes with the cooperation between the first transmitting coil 1541 and the magnet 173.

[0150] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0151] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wireless charging cradle, comprising: The wireless charging base comprises: a housing having an air inlet and an air outlet, an outer surface of the housing having a charging area; an impeller rotatably arranged in the housing, the impeller comprising a magnet; a plurality of first transmitting coils fixed in the housing, the plurality of first transmitting coils being arranged in a ring array with the rotation axis of the impeller as the center line, each of the first transmitting coils being opposite to a different area of the charging area, each of the first transmitting coils being an independent coil winding, each of the first transmitting coils having a charging working state and a driving working state, each of the first transmitting coils being capable of being used as a charging coil and a driving coil; in the charging working state, the first transmitting coil is used as a charging coil, and the first transmitting coil is adapted to be charged matched with a receiving coil of an electronic device; in the driving working state, the first transmitting coil is used as a driving coil, and the first transmitting coil generates a driving magnetic field matched with the magnet for driving the impeller to rotate; a switching control circuit for controlling each of the first transmitting coils to switch between the charging working state and the driving working state.

2. The wireless charging cradle of claim 1, wherein, The switching control circuit is configured to control at least one of the first transmitting coils in the plurality of first transmitting coils to work in the charging working state, and control the remaining first transmitting coils to work in the driving working state.

3. The wireless charging cradle of claim 2, wherein, The switching control circuit is configured to control one of the first transmitting coils in the plurality of first transmitting coils to work in the charging working state; wherein in the orthographic projection of the charging area, the one of the first transmitting coils has the maximum overlapping area with the orthographic projection of the receiving coil of the electronic device in the charging area.

4. The wireless charging cradle of claim 2 or 3, wherein, Further comprising at least one temperature detection device for detecting a current temperature of the charging area, the switching control circuit being electrically connected with the temperature detection device, and the switching control circuit being configured to control the remaining first transmitting coils to work in the driving working state when the current temperature is greater than or equal to a preset threshold.

5. The wireless charging cradle of claim 1, wherein, The wireless charging base has a charging mode and a heat dissipation mode, the switching control circuit is configured to control at least one of the first transmitting coils in the plurality of first transmitting coils to work in the charging working state in the charging mode, and the switching control circuit is configured to control all the first transmitting coils to work in the driving working state in the heat dissipation mode.

6. The wireless charging cradle of claim 5, wherein, Further comprising at least one temperature detection device for detecting a current temperature of the charging area, the switching control circuit being electrically connected with the temperature detection device, and the switching control circuit being configured to control the wireless charging base to enter the heat dissipation mode when the current temperature is greater than or equal to a preset threshold.

7. The wireless charging cradle of any one of claims 1-3, wherein, Further comprising: at least one position detection device for detecting a magnetic pole position signal of the magnet; the wireless charging base further comprises a charging circuit and a power supply circuit connected in parallel; The charging circuit comprises an inverter circuit, and two first switches are arranged between each first transmitting coil and the inverter circuit, and the two ends of each first transmitting coil are connected to the input end of the inverter circuit and the output end of the inverter circuit through the first switches respectively. The power supply circuit comprises a drive chip, the drive chip is electrically connected with the position detection device, two second switches are arranged between each first transmitting coil and the drive chip, and the two ends of each first transmitting coil are further connected to the input end of the drive chip and the output end of the drive chip through the second switches respectively. The switching control circuit is used for controlling the opening and closing of the first switches and the second switches corresponding to each first transmitting coil.

8. The wireless charging cradle of any one of claims 1-3, wherein, The first transmitting coil is a planar coil, and a central axis of the first transmitting coil is arranged in parallel with a rotation axis of the impeller.

9. The wireless charging cradle of any one of claims 1-3, wherein, The wall plate where the charging area is located is on one side of the impeller in the axial direction, and along the axial direction of the impeller, the plurality of first transmitting coils are on the side of the impeller close to the charging area.

10. The wireless charging cradle of claim 9, wherein, A first magnetic conducting plate is further arranged on the other side of the impeller in the axial direction, and the first transmitting coils are arranged on the side of the first magnetic conducting plate.

11. The wireless charging cradle of any one of claims 1-3, wherein, The first transmitting coil is at least four, and the first transmitting coil is an even number.

12. The wireless charging pad of any one of claims 1-3, wherein, The impeller comprises a hub portion and a plurality of blades, the hub portion is rotatably arranged in the shell, the plurality of blades are arranged at the outer periphery of the hub portion, the plurality of magnets are arranged on the different blades respectively, and the plurality of magnets are arranged uniformly and spaced apart in the circumferential direction of the hub portion.

13. The wireless charging cradle of claim 12, wherein, The central axis of the first transmitting coil is arranged in parallel with the rotation axis of the impeller, the wall plate where the charging area is located is on one side of the impeller in the axial direction, and along the axial direction of the impeller, the plurality of first transmitting coils are on the side of the impeller close to the charging area. The central axis of the first transmitting coil is arranged in parallel with the rotation axis of the impeller, the wall plate where the charging area is located is on one side of the impeller in the axial direction, and along the axial direction of the impeller, the plurality of first transmitting coils are on the side of the impeller close to the charging area.

14. The wireless charging cradle of any one of claims 1-3, wherein, The central axis of the first transmitting coil is arranged in parallel with the rotation axis of the impeller, the wall plate where the charging area is located is on one side of the impeller in the axial direction, and along the axial direction of the impeller, the plurality of first transmitting coils are on the side of the impeller close to the charging area.

15. The wireless charging cradle of claim 14, wherein, The central axis of the first transmitting coil is arranged in parallel with the rotation axis of the impeller, the wall plate where the charging area is located is on one side of the impeller in the axial direction, and along the axial direction of the impeller, the plurality of first transmitting coils are on the side of the impeller close to the charging area.

16. The wireless charging cradle of claim 14, wherein, The second transmitting coil is a planar coil, and a central axis of the second transmitting coil is arranged in parallel with the extension direction of the rotation axis of the impeller.

17. A wireless charging system, comprising: A second magnetic conducting plate is further arranged between the second transmitting coil and the impeller, and the plurality of first transmitting coils are arranged on the side facing the outer circumferential surface of the second magnetic conducting plate. The second transmitting coil is a planar coil, and a central axis of the second transmitting coil is arranged in parallel with the extension direction of the rotation axis of the impeller. A second magnetic conducting plate is further arranged between the second transmitting coil and the impeller, and the plurality of first transmitting coils are arranged on the side facing the outer circumferential surface of the second magnetic conducting plate. The wireless charging cradle of any one of claims 1-16; An electronic device comprising a receive coil for charging matching with at least one of the first transmit coils.

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