Conversion device for wireless charging and control method therefor

Abstract

The present application discloses a conversion device for wireless charging and a control method therefor. The conversion device is provided between a wireless power supply device and a device to be charged. The control method comprises: acquiring a first wireless charging protocol supported by the wireless power supply device, and acquiring a second wireless charging protocol supported by the device to be charged; and when the first wireless charging protocol and the second wireless charging protocol are different, using the first wireless charging protocol to communicate with the wireless power supply device, so as to receive power supply of the wireless power supply device; and using the second wireless charging protocol to communicate with the device to be charged, so as to charge the device to be charged. According to the conversion device for wireless charging and the control method therefor in the present application, efficient charging can be realized when the charging protocols supported by a wireless power supply device and a device to be charged are inconsistent.

Description

Conversion device for wireless charging and control method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311844335.7, filed on December 28, 2023, entitled “Conversion device for wireless charging and control method thereof,” the entire contents of which are incorporated herein for all purposes. Technical Field

[0003] The present application relates to the technical field of wireless charging, and in particular to a conversion device for wireless charging and a control method thereof. Background Art

[0004] With the popularization of wireless charging technology, more and more terminal devices have been equipped with wireless charging functions. However, due to different production years, the charging protocols used between wireless power supply devices and devices to be charged may be different.

[0005] When the charging protocols used by the wireless power supply device and the device to be charged do not match (that is, they are not exactly the same), the charging power may be degraded, or repeated power outages or charging failures may occur due to protocol incompatibility, resulting in a poor user experience.

[0006] Therefore, improvements are needed to at least partially solve the above problems. Summary of the Invention

[0007] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0008] In a first aspect, an embodiment of the present application provides a control method for a conversion device for wireless charging, wherein the conversion device is disposed between a wireless power supply device and a device to be charged, and the control method includes:

[0009] Obtain a first wireless charging protocol supported by the wireless power supply device, and obtain a second wireless charging protocol supported by the device to be charged;

[0010] Determining whether the first wireless charging protocol and the second wireless charging protocol are the same;

[0011] When the first wireless charging protocol and the second wireless charging protocol are different, the first wireless charging protocol is used to communicate with the wireless power supply device to receive power from the wireless power supply device, and the second wireless charging protocol is used to communicate with the device to be charged to charge the device to be charged.

[0012] In a second aspect, an embodiment of the present application provides a conversion device for wireless charging, the conversion device comprising:

[0013] A receiving coil, configured to receive power from the wireless power supply device;

[0014] A transmitting coil, used to charge the device to be charged;

[0015] a first magnetic attraction unit, the first magnetic attraction unit surrounding the transmitting coil;

[0016] a control unit connected to the transmitting coil and the receiving coil, configured to obtain a first wireless charging protocol supported by the wireless power supply device through the receiving coil, obtain a second wireless charging protocol supported by the device to be charged through the transmitting coil, and determine whether the first wireless charging protocol and the second wireless charging protocol are the same;

[0017] The control unit is further configured to control the receiving coil to communicate with the wireless power supply device using the first wireless charging protocol, and control the transmitting coil to communicate with the device to be charged using the second wireless charging protocol, when the first wireless charging protocol and the second wireless charging protocol are different. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of this application are hereby incorporated as part of this application for understanding this application. The drawings show the embodiments of this application and their descriptions, and are used to explain the device and principle of this application. In the drawings,

[0019] FIG1 is a schematic structural block diagram of a conversion device according to an embodiment of the present application;

[0020] FIG2 is a flow chart of a control method for a conversion device according to an embodiment of the present application.

[0021] Explanation of reference numerals: 100 - conversion device, 110 - receiving coil, 120 - transmitting coil, 130 - control unit, 140 - first magnetic unit, 150 - second magnetic unit, 200 - wireless power supply device, 300 - device to be charged. DETAILED DESCRIPTION

[0022] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features well known in the art are not described in order to avoid confusion with the present application.

[0023] It should be understood that the present application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present application to those skilled in the art. In the drawings, the dimensions and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals throughout represent like elements.

[0024] It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are merely used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of this application, the first element, component, region, layer, or part discussed below may be represented as a second element, component, region, layer, or part.

[0025] Spatially relative terms, such as "below," "beneath," "beneath," "above," "upper," etc., may be used herein for convenience to describe the relationship of one element or feature to other elements or features illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientations depicted in the figures.

[0026] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present application. When used herein, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0027] 1 , a conversion device 100 for wireless charging according to an embodiment of the present application is exemplarily described. The conversion device 100 includes a receiving coil, a transmitting coil, a first magnetic unit 140 and a control unit 130 .

[0028] The receiving coil 110 is disposed on a first side of the conversion device 100 and is configured to receive power from the wireless power supply device 200. The wireless power supply device 200 may be a wireless charger having a transmitting coil. The receiving coil 110 may receive power from the transmitting coil in the wireless power supply device 200 via electromagnetic induction.

[0029] The transmitting coil 120 is located on the second side of the conversion device 100, that is, on the side opposite the receiving coil 110, and is used to charge the device to be charged 300. The device to be charged 300 can be a mobile phone or other electronic device capable of wireless charging. It has a receiving coil. The transmitting coil 120 can charge the receiving coil in the device to be charged 300 through the principle of electromagnetic induction.

[0030] The control unit 130 is connected to the receiving coil 110 and the transmitting coil 120. The control unit 130 can be arranged between the transmitting coil and the receiving coil to make the structure of the conversion device 100 more compact. The control unit 130 is used to obtain the first wireless charging protocol supported by the wireless power supply device 200 through the receiving coil, and obtain the second wireless charging protocol supported by the device to be charged 300 through the transmitting coil. Specifically, when the conversion device 100 is located between the wireless power supply device 200 and the device to be charged 300, the wireless power supply device 200 can send information to the receiving coil 110 through its transmitting coil in a frequency shift keying modulation (FSK) manner, and the control unit 130 can send information to the transmitting coil of the wireless power supply device 200 through the receiving coil 110 in an amplitude shift keying modulation (ASK) manner. Thus, the control unit 130 and the wireless power supply device 200 can exchange information and obtain the first wireless charging protocol supported by the wireless power supply device 200. The first wireless charging protocol can be Qi1.0 protocol, Qi1.2 protocol (including Qi1.2.4 and other protocols starting with Qi1.2), Qi1.3 (including Qi1.3.2 and other protocols starting with Qi1.3) protocol, Qi2.0 protocol or MagSafe protocol. Among them, the Qi2.0 protocol incorporates the characteristics of Apple's MagSafe magnetic attraction to form the MPP specification, and the MagSafe protocol is a charging protocol supported by the MagSafe charger. The control unit 130 can send information to the receiving coil of the device to be charged 300 in a frequency shift keying modulation (FSK) manner through its transmitting coil 120, and the device to be charged 300 can send information to the transmitting coil 120 in an amplitude shift keying modulation (ASK) manner through its receiving coil. Thus, the control unit 130 and the device to be charged 300 can exchange information and obtain the second wireless charging protocol supported by the device to be charged 300. The second wireless charging protocol can be Qi1.0, Qi1.2 (including Qi1.2.4 and other protocols starting with Qi1.2), Qi1.3 (including Qi1.3.2 and other protocols starting with Qi1.3), Qi2.0, or MagSafe. After obtaining the first and second wireless charging protocols, the control unit 130 determines whether they are the same.

[0031] When the first wireless charging protocol and the second wireless charging protocol are different, the control unit 130 can control the receiving coil 110 to communicate with the wireless power supply device 200 using the first wireless charging protocol to receive power from the wireless power supply device 200. Since the first wireless charging protocol is a charging protocol supported by the wireless power supply device 200, optimal energy transmission can be achieved between the wireless power supply device 200 and the conversion device 100. The transmitting coil 120 can be controlled to communicate with the device to be charged 300 using the second wireless charging protocol to charge the device to be charged 300 using the power received from the wireless power supply device 200. Since the second wireless charging protocol is a charging protocol supported by the device to be charged 300, optimal energy transmission can be achieved between the wireless power supply device 200 and the device to be charged 300. For example, when the first charging protocol is the Qi1.2 protocol and the second charging protocol is the MagSafe protocol, that is, when the charging protocol supported by the wireless power supply device 200 is the Qi1.2 protocol and the charging protocol supported by the device to be charged 300 is the MagSafe protocol, it is impossible to charge the device to be charged 300 directly through the wireless power supply device 200. However, through the conversion device 100 of the present application, it is possible to communicate with the wireless power supply device 200 using the Qi1.2 protocol to receive power from the wireless power supply device 200, and then communicate with the device to be charged 300 using the MagSafe protocol to charge the device to be charged 300 using the power received from the wireless power supply device 200. It should be noted that the conversion device 100 of the present application supports multi-protocol communication functions, such as supporting the Qi1.0 protocol, Qi1.2 protocol, Qi1.3 protocol, Qi2.0 protocol, MagSafe protocol, etc. The communication protocols supported by the conversion device 100 can cover all communication protocols used between the wireless power supply device 200 and the device to be charged 200 known to those skilled in the art. For another example, when the first charging protocol is Qi1.2 and the second charging protocol is Qi2.0, that is, the wireless power supply device 200 supports the Qi1.2 protocol and the device to be charged 300 supports the Qi2.0 protocol, the device to be charged 300 is charged directly through the wireless power supply device 200. Due to the mismatch of the charging protocols, it can usually only be charged at a low power of 5W, and repeated power outages may occur. However, through the conversion device 100 of the present application, it is possible to communicate with the wireless power supply device 200 using the Qi1.2 protocol, receive power from the wireless power supply device 200 at a maximum power of 15W, and then communicate with the device to be charged 300 using the Qi2.0 protocol, and charge the device to be charged 300 at a maximum power of 15W. This can achieve efficient charging, avoid repeated power outages or charging failures, and significantly improve user experience.The conversion device according to the present application can convert different types of charging protocols (Qi protocol and MagSafe protocol) and different versions of the same protocol (different versions of the Qi protocol), eliminating the problem of inconsistent types or versions of protocols supported by the wireless power supply device 200 and the device to be charged 300, so that efficient charging can be achieved between new and old devices, avoiding repeated power outages or charging failures, allowing old devices to be revitalized and improving charging efficiency.

[0032] When the first wireless charging protocol and the second wireless charging protocol are the same, and both are Qi 1.3 or Qi 2.0, the control unit 130 can control the receiving coil 110 and the transmitting coil 120 to transparently transmit data between the wireless power supply device 200 and the device to be charged 300. That is, the information received from the wireless power supply device 200 by the receiving coil 110 is transmitted intact to the device to be charged 300 by the transmitting coil 120, and the information received from the device to be charged 300 by the transmitting coil 120 is transmitted intact to the wireless power supply device 200 by the transmitting coil 120, thereby achieving communication between the wireless power supply device 200 and the device to be charged 300. Furthermore, the power received from the wireless power supply device 200 by the receiving coil 110 by the transmitting coil 120 is provided to the device to be charged 300 at the same power. In some embodiments, the conversion device 100 is provided with a reminder unit for issuing a reminder message. The control unit 130 is connected to the reminder unit and is configured to control the reminder unit to issue a reminder message when the first wireless charging protocol and the second wireless charging protocol are the same, thereby reminding the user that the conversion device 100 is not required and that the wireless power supply device 200 can be used directly to charge the device to be charged 300. The reminder unit may include an indicator light and / or a speaker to issue a light and / or sound reminder message.

[0033] In an embodiment of the present application, when the first wireless charging protocol is the Qi1.2 protocol, the Qi1.3 protocol, or the Qi2.0 protocol, the wireless power supply device 200 supports foreign object detection (FOD). The control unit 130 can feed back the first received power to the wireless power supply device 200 through the receiving coil 110, for example, regularly feeding back the first received power at a certain time interval, so that the wireless power supply device 200 can detect foreign objects. The first received power is the power received by the receiving coil 110. Thus, the wireless power supply device 200 can perform foreign object detection based on the transmission power of its transmitting coil and the first received power (that is, the power received by the receiving coil 110) to determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100. Specifically, the wireless power supply device 200 can determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100 based on whether the difference between the transmission power of its transmitting coil and the first received power is greater than a set threshold. When the difference is greater than the set threshold, it indicates that there is a foreign object between the two, and the wireless power supply device 200 can stop powering to ensure safety.

[0034] In an embodiment of the present application, when the second wireless charging protocol is the Qi1.2 protocol, the Qi1.3 protocol, or the Qi2.0 protocol, the device to be charged 300 supports foreign object detection, and the device to be charged 300 can feed back the second received power to the conversion device 100, wherein the second received power is the power received by the receiving coil in the device to be charged 300 (i.e., the received power of the receiving coil). The control unit 130 can perform foreign object detection based on the transmission power of the conversion device and the second received power fed back by the device to be charged 300 to determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100. The transmission power of the conversion device is the transmission power of the transmitting coil 120 (i.e., the power that the transmitting coil supplies to the device to be charged 300). Specifically, the control unit 130 can determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100 based on whether the difference between the transmission power of the transmitting coil 120 and the second received power is greater than a set threshold. When the difference is greater than the set threshold, it indicates that there is a foreign object between the two, and the control unit 130 can control the transmitting coil 120 to stop supplying power to ensure safety.

[0035] In an embodiment of the present application, the control unit 130 may include a communication chip (or communication chipset) that supports Qi1.0, Qi1.2, Qi1.3, Qi2.0, and MagSafe protocols. The communication chip (or communication chipset) can modulate and demodulate signals through the receiving coil 110 and the transmitting coil 120 to achieve information transmission. The communication chip (or communication chipset) also has an encryption and decryption module for encrypting and decrypting the transmitted information when the first wireless charging protocol and / or the second wireless charging protocol is the Qi1.3 protocol or the Qi2.0 protocol. In an embodiment of the present application, the conversion device 100 also includes a power conversion unit, which is used to convert power between the receiving coil 110 and the transmitting coil 120. For example, when the first charging protocol is the Qi1.2 protocol and the second charging protocol is the MagSafe protocol, it can convert 10W or 15W of power received from the receiving coil 110 into 7.5W and provide it to the device to be charged 300 through the transmitting coil 120. The power conversion unit may include an inverter or other suitable device capable of performing power conversion between the receiving coil 110 and the transmitting coil 120. The control unit 130 is connected to the power conversion unit and is configured to control the power conversion unit to perform (or not perform) power conversion according to the first charging protocol and the second charging protocol.

[0036] In an embodiment of the present application, the conversion device 100 further includes a first magnetic unit 140 and a second magnetic unit 150. The first magnetic unit 140 surrounds the receiving coil 110 and is used to be attracted to the receiving coil 110 when the wireless power supply device 200 has a corresponding magnetic unit, so that the receiving coil 110 and the transmitting coil in the wireless power supply device 200 can be better aligned, thereby improving energy transmission efficiency. The second magnetic unit 150 surrounds the transmitting coil 120 and is used to be attracted to the transmitting coil 120 when the device to be charged 300 has a corresponding magnetic unit, so that the transmitting coil 120 and the receiving coil in the device to be charged 300 can be better aligned, thereby improving energy transmission efficiency. The first magnetic unit 140 and the second magnetic unit 150 can be an annular magnet array. In some embodiments, the first magnetic unit 140 and the second magnetic unit 150 may not be provided in the conversion device 100.

[0037] In some embodiments, the conversion device 100 may further include a battery and an AC-DC converter. The battery may charge the control unit 130 before the wireless power supply device 200 formally charges the conversion device 100, enabling the control unit 130 to communicate normally with the wireless power supply device 200 and the device to be charged 300 via the receiving coil 110 and the transmitting coil 120. The AC-DC converter is used to convert the alternating current (AC) generated by electromagnetic induction in the receiving coil 110 into DC power to charge the battery. In some embodiments, the conversion device 100 may also not include a battery, but instead directly convert the AC power generated by electromagnetic induction in the receiving coil 110 into DC power via the AC-DC converter to power the control unit 130.

[0038] According to the conversion device 100 for wireless charging of the present application, as long as it is placed between the wireless power supply device 200 and the device to be charged 300, when the charging protocols supported by the wireless power supply device 200 and the device to be charged 300 are inconsistent, it can communicate with the wireless power supply device 200 using the first wireless charging protocol and communicate with the device to be charged 300 using the second wireless charging protocol, so that the wireless power supply device 200 and the device to be charged 300 can efficiently communicate and transmit energy through the conversion device 100, thereby achieving efficient charging, avoiding repeated power outages or charging failures, and significantly improving the user experience.

[0039] 2 , an embodiment of the present application further provides a control method for a conversion device 100 for wireless charging. The conversion device 100 may be the conversion device 100 in the above embodiment, which is disposed between a wireless power supply device 200 and a device to be charged 300. The control method for the conversion device 100 includes:

[0040] S100: Obtain a first wireless charging protocol supported by the wireless power supply device 200, and obtain a second wireless charging protocol supported by the device to be charged 300;

[0041] Specifically, when the conversion device 100 is located between the wireless power supply device 200 and the device to be charged 300, the wireless power supply device 200 can send information to the receiving coil 110 through its transmitting coil in frequency shift keying modulation (FSK), and the control unit 130 in the conversion device 100 can send information to the transmitting coil of the wireless power supply device 200 through the receiving coil 120 in amplitude shift keying modulation (ASK). Thus, the control unit 130 and the wireless power supply device 200 can exchange information and obtain the first wireless charging protocol supported by the wireless power supply device 200. The first wireless charging protocol can be Qi1.0 protocol, Qi1.2 protocol (including Qi1.2.4 and other protocols starting with Qi1.2), Qi1.3 (including Qi1.3.2 and other protocols starting with Qi1.3) protocol, Qi2.0 protocol or MagSafe protocol. Among them, the Qi2.0 protocol incorporates the magnetic attraction characteristics of Apple's MagSafe to form the MPP specification, and the MagSafe protocol is the charging protocol supported by the MagSafe charger. The control unit 130 can send information to the receiving coil of the device to be charged 300 in a frequency shift keying modulation (FSK) manner through its transmitting coil 120, and the device to be charged 300 can send information to the transmitting coil 120 in an amplitude shift keying modulation (ASK) manner through its receiving coil. Thus, the control unit 130 and the device to be charged 300 can exchange information and obtain the second wireless charging protocol supported by the device to be charged 300. The second wireless charging protocol can be Qi1.0 protocol, Qi1.2 protocol (including Qi1.2.4 and other protocols starting with Qi1.2), Qi1.3 (including Qi1.3.2 and other protocols starting with Qi1.3) protocol, Qi2.0 protocol or MagSafe protocol.

[0042] S200: Determine whether the first wireless charging protocol and the second wireless charging protocol are the same.

[0043] Specifically, after acquiring the first wireless charging protocol and the second wireless charging protocol, the control unit 130 determines whether they are the same.

[0044] S300: When the first wireless charging protocol and the second wireless charging protocol are different, communicate with the wireless power supply device 200 using the first wireless charging protocol to receive power from the wireless power supply device 200, and communicate with the device to be charged 300 using the second wireless charging protocol to charge the device to be charged 300.

[0045] Specifically, the control unit 130 can control the receiving coil 110 to communicate with the wireless power supply device 200 using a first wireless charging protocol to receive power from the wireless power supply device 200. Since the first wireless charging protocol is supported by the wireless power supply device 200, optimal energy transmission can be achieved between the wireless power supply device 200 and the conversion device 100. The transmitting coil 120 can be controlled to communicate with the device to be charged 300 using a second wireless charging protocol to charge the device to be charged 300 using the power received from the wireless power supply device 200. Since the second wireless charging protocol is supported by the device to be charged 300, optimal energy transmission can be achieved between the wireless power supply device 200 and the device to be charged 300. For example, when the first charging protocol is Qi1.2 and the second charging protocol is MagSafe, that is, when the wireless power supply device 200 supports Qi1.2 and the device to be charged 300 supports MagSafe, the device to be charged 300 cannot be charged directly through the wireless power supply device 200. However, through the conversion device 100 of the present application, it is possible to communicate with the wireless power supply device 200 using the Qi1.2 protocol, receive power from the wireless power supply device 200, and then communicate with the device to be charged 300 using the MagSafe protocol, using the power received from the wireless power supply device 200 to charge the device to be charged 300. For another example, when the first charging protocol is the Qi1.2 protocol and the second charging protocol is the Qi2.0 protocol, that is, when the wireless power supply device 200 supports the Qi1.2 protocol and the device to be charged 300 supports the Qi2.0 protocol, the device to be charged 300 is charged directly through the wireless power supply device 200. Due to the mismatch of the charging protocols, it can usually only be charged at a low power of 5W, and repeated power outages may occur. The conversion device 100 of the present application can communicate with the wireless power supply device 200 using the Qi1.2 protocol, receive power from the wireless power supply device 200 with a maximum power of 15W, and then communicate with the device to be charged 300 using the Qi2.0 protocol to charge the device to be charged 300 with a maximum power of 15W. This can achieve efficient charging, avoid repeated power outages or charging failures, and significantly improve user experience.

[0046] In this embodiment, the control method of the conversion device 100 further includes:

[0047] S400: When the first wireless charging protocol and the second wireless charging protocol are the same, and both the first wireless charging protocol and the second wireless charging protocol are Qi1.3 protocol or Qi2.0 protocol, data is transparently transmitted between the wireless power supply device 200 and the device to be charged 300, power is received from the wireless power supply device 200, and the device to be charged 300 is charged.

[0048] Specifically, the control unit 130 can transmit the information received from the wireless power supply device 200 via the receiving coil 110 intactly to the device to be charged 300 via the transmitting coil 120, and transmit the information received from the device to be charged 300 via the transmitting coil 120 intactly to the wireless power supply device 200 via the receiving coil 110, thereby achieving communication between the wireless power supply device 200 and the device to be charged 300. Furthermore, the electric energy received from the wireless power supply device 200 via the receiving coil 110 is provided to the device to be charged 300 via the transmitting coil 120 at the same power.

[0049] In some embodiments, when the determination result of step S200 is yes, step S500 is performed.

[0050] S500: When the first wireless charging protocol and the second wireless charging protocol are different, a reminder message is issued to remind the user to directly use the wireless power supply device 200 to charge the device to be charged 300.

[0051] Specifically, the conversion device 100 is provided with a reminder unit for issuing a reminder message. The control unit 130 is connected to the reminder unit. If the first wireless charging protocol and the second wireless charging protocol are the same, the reminder unit is controlled to issue a reminder message to remind the user that there is no need to use the conversion device 100 and that the wireless power supply device 200 can be used directly to charge the device to be charged 300. The reminder unit may include an indicator light and / or a speaker to issue a light and / or sound reminder message.

[0052] In an embodiment of the present application, the control method further includes:

[0053] S600: When the first wireless charging protocol is Qi1.2 protocol, Qi1.3 protocol or Qi2.0 protocol, feeding back first received power to the wireless power supply device 200 , wherein the first received power is the power received by the conversion device 100 .

[0054] Specifically, when the first wireless charging protocol is the Qi1.2 protocol, the Qi1.3 protocol, or the Qi2.0 protocol, the wireless power supply device 200 supports foreign object detection (FOD). The control unit 130 can feed back the first received power to the wireless power supply device 200 through the receiving coil 110, for example, regularly feeding back the first received power at a certain time interval, so that the wireless power supply device 200 can perform foreign object detection. The first received power is the power of the power received by the receiving coil 110. Thus, the wireless power supply device 200 can perform foreign object detection at the first received power based on the transmit power of its transmitting coil and the first received power (that is, the receive power of the receiving coil 110) to determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100. Specifically, the wireless power supply device 200 can determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100 based on whether the difference between the transmit power of its transmitting coil and the first received power is greater than a set threshold. When the difference is greater than the set threshold, it indicates that there is a foreign object between the two, and the wireless power supply device 200 can stop powering to ensure safety.

[0055] S700: When the second wireless charging protocol is Qi1.2, Qi1.3, or Qi2.0, foreign object detection is performed based on the transmission power of the conversion device 100 and the second received power fed back by the device to be charged 300. The transmission power of the conversion device 100 is the transmission power of the transmitting coil 120 (i.e., the power supplied by the transmitting coil to the device to be charged 300), and the second received power is the power received by the device to be charged 300.

[0056] Specifically, when the second wireless charging protocol is Qi1.2, Qi1.3, or Qi2.0, the device to be charged 300 supports foreign object detection, and the wireless power supply device 200 can feed back the second received power to the conversion device 100, where the second received power is the power received by the receiving coil in the device to be charged 300 (i.e., the received power of the receiving coil). The control unit 130 can perform foreign object detection based on the transmit power of the transmitting coil 120 (i.e., the power used by the transmitting coil to charge the device 300) and the second received power fed back by the device to be charged 300 to determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100. Specifically, the control unit 130 can determine whether there is a foreign object between the wireless power supply device 200 and the conversion device 100 based on whether the difference between the transmit power of the transmitting coil 120 and the second received power is greater than a set threshold. When the difference is greater than the set threshold, it indicates that there is a foreign object between the two, and the control unit 130 can control the transmitting coil 120 to stop supplying power to ensure safety.

[0057] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely illustrative and are not intended to limit the scope of the present application. Various changes and modifications may be made therein by those skilled in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0058] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units described is merely a logical function division. In actual implementation, other division methods may be used, such as combining or integrating multiple units or components into another device, or ignoring or not performing some features.

[0060] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0061] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various inventive aspects, in the description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this approach of the present application should not be interpreted as reflecting the intention that the application claimed for protection requires more features than those explicitly recited in each claim. More precisely, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with fewer features than all the features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present application.

[0062] Those skilled in the art will understand that, except where mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus disclosed herein may be combined in any combination. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that provides the same, equivalent, or similar purpose.

[0063] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

[0064] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A control method for a conversion device used for wireless charging, characterized in that, The conversion device is arranged between the wireless power supply device and the device to be charged, and the control method includes: Obtaining a first wireless charging protocol supported by the wireless power supply device, and obtaining a second wireless charging protocol supported by the device to be charged; Determining whether the first wireless charging protocol is the same as the second wireless charging protocol; When the first wireless charging protocol is different from the second wireless charging protocol, communicate with the wireless power supply device using the first wireless charging protocol, receive power supply from the wireless power supply device, and communicate with the device to be charged using the second wireless charging protocol to charge the device to be charged.

2. The control method according to claim 1, wherein: The first wireless charging protocol is Qi1.0 protocol, Qi1.2 protocol, Qi1.3 protocol, Qi2.0 protocol or MagSafe protocol; The second wireless charging protocol is Qi1.0 protocol, Qi1.2 protocol, Qi1.3 protocol, Qi2.0 protocol or MagSafe protocol.

3. The control method according to claim 2, wherein: The control method further includes: When the first wireless charging protocol is the same as the second wireless charging protocol, and both the first wireless charging protocol and the second wireless charging protocol are Qi1.3 protocol or Qi2.0 protocol, perform data transparent transmission between the wireless power supply device and the device to be charged, receive power supply from the wireless power supply device and charge the device to be charged.

4. The control method according to claim 3, wherein: When the first wireless charging protocol is Qi1.2 protocol, Qi1.3 protocol or Qi2.0 protocol, feedback a first received power to the wireless power supply device, where the first received power is the power of the power supply received by the conversion device; When the second wireless charging protocol is Qi1.2 protocol, Qi1.3 protocol or Qi2.0 protocol, perform foreign object detection according to the transmission power of the conversion device and a second received power feedback by the device to be charged.

5. A conversion device for wireless charging, characterized in that, The conversion device includes: A receiving coil for receiving power supply from the wireless power supply device; A transmitting coil for charging the device to be charged; A first magnetic attraction unit, and the first magnetic attraction unit surrounds the transmitting coil; A control unit, the control unit is connected to the transmitting coil and the receiving coil, and is used to obtain a first wireless charging protocol supported by the wireless power supply device through the receiving coil, obtain a second wireless charging protocol supported by the device to be charged through the transmitting coil, and determine whether the first wireless charging protocol is the same as the second wireless charging protocol; The control unit is further used to, when the first wireless charging protocol is different from the second wireless charging protocol, control the receiving coil to communicate with the wireless power supply device using the first wireless charging protocol, and control the transmitting coil to communicate with the device to be charged using the second wireless charging protocol.

6. The conversion device according to claim 5, wherein: The first wireless charging protocol is Qi1.0 protocol, Qi1.2 protocol, Qi1.3 protocol, Qi2.0 protocol or MagSafe protocol; The second wireless charging protocol is Qi1.0 protocol, Qi1.2 protocol, Qi1.3 protocol, Qi2.0 protocol or MagSafe protocol.

7. The conversion device according to claim 6, wherein the control unit is further configured to control data transparent transmission between the receiving coil and the transmitting coil between the wireless power supply device and the device to be charged when the first wireless charging protocol and the second wireless charging protocol are the same and both the first wireless charging protocol and the second wireless charging protocol are Qi1.3 protocol or Qi2.0 protocol.

8. The conversion device according to claim 7, wherein the control unit is further configured to feedback a first received power to the wireless power supply device through the receiving coil when the first wireless charging protocol is Qi1.2 protocol, Qi1.3 protocol or Qi2.0 protocol, wherein the first received power is the power of the power supply received by the receiving coil; the control unit is further configured to perform foreign object detection according to the transmission power of the transmitting coil and a second received power fed back by the device to be charged when the second wireless charging protocol is Qi1.2 protocol, Qi1.3 protocol or Qi2.0 protocol.

9. The conversion device according to any one of claims 5-8, wherein the conversion device further includes a second magnetic attraction unit, and the second magnetic attraction unit surrounds the receiving coil.

10. The conversion device according to any one of claims 5-8, wherein the conversion device further includes a power conversion unit, and the power conversion unit is configured to perform power conversion between the receiving coil and the transmitting coil.

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