Wireless charging method and device

Abstract

This application provides a wireless charging method and device, relating to the field of wireless charging technology. The wireless charging device includes a plurality of transmitting coils, each including a first transmitting coil or a second transmitting coil, the second transmitting coil being larger in size than the first transmitting coil. The wireless charging method includes: upon powering on the wireless charging device, acquiring the Q values ​​of the first and second transmitting coils; determining that a first electronic device is placed on the charging surface corresponding to the first transmitting coil based on the difference between two adjacent detections of the Q values ​​of the first transmitting coil being greater than or equal to a first difference threshold; and controlling the first transmitting coil to charge the first electronic device. Similarly, determining that a second electronic device is placed on the charging surface corresponding to the second transmitting coil based on the difference between two adjacent detections of the Q values ​​of the second transmitting coil being greater than or equal to a second difference threshold; and controlling the second transmitting coil to charge the second electronic device. This improves the compatibility of the wireless charging device.

Description

Technical Field

[0001] The present application relates to the field of wireless charging technology, and in particular to a wireless charging method and device. Background Art

[0002] With the development of wireless charging technology, not only smartphones support wireless charging, but also wearable products such as smart watches and wireless Bluetooth headsets. Due to the large difference in size of different products, different products are usually equipped with separate wireless chargers, resulting in an increasing number of various supporting wireless chargers on the market. Wireless chargers that charge a single type of product are difficult to meet the market demand for multi-device adaptation. Summary of the invention

[0003] The embodiments of the present application provide a wireless charging method and device, aiming to solve the problem of how to improve the compatibility of wireless charging devices.

[0004] In a first aspect, an embodiment of the present application provides a wireless charging method, which is applied to a wireless charging device. The wireless charging device includes a plurality of transmitting coils, and the transmitting coils include a first transmitting coil or a second transmitting coil, and the size of the second transmitting coil is larger than the size of the first transmitting coil. The method includes: based on the power-on of the wireless charging device, obtaining the Q value of the first transmitting coil and the Q value of the second transmitting coil. Based on the difference between the Q values ​​of the first transmitting coil detected twice adjacently is greater than or equal to the first difference threshold, it is determined that a first electronic device is placed on the charging surface corresponding to the first transmitting coil, and the first transmitting coil is controlled to charge the first electronic device. Based on the difference between the Q values ​​of the second transmitting coil detected twice adjacently is greater than or equal to the second difference threshold, it is determined that a second electronic device is placed on the charging surface corresponding to the second transmitting coil, and the second transmitting coil is controlled to charge the second electronic device.

[0005] In this embodiment, the size of the transmitting coil of the wireless charging device matches the size of the receiving coil of the electronic device, the large-sized transmitting coil is adapted to the receiving coil of the large-sized electronic device, and the small-sized transmitting coil is adapted to the receiving coil of the small-sized electronic device. Therefore, by integrating the large-sized transmitting coil and the small-sized transmitting coil on the wireless charging device, it is possible to charge both large-sized electronic devices and small-sized electronic devices, thereby improving the compatibility of the wireless charging device.

[0006] In one embodiment, the wireless charging device includes a plurality of inverter circuits, the wireless charging device also includes a plurality of first charging branches and / or a plurality of second charging branches, the plurality of first charging branches are connected in parallel, and the plurality of inverter circuits are used to provide AC current to one of the plurality of first charging branches and / or the plurality of second charging branches. The first charging branch includes a transmitting coil and a switch connected in series with the transmitting coil, and the second charging branch includes a transmitting coil.

[0007] In this embodiment, based on the wireless charging device including an inverter circuit and a plurality of first charging branches, the wireless charging device supports alternating charging of multiple electronic devices. Based on the wireless charging device including a plurality of inverter circuits and a plurality of second charging branches, the wireless charging device supports charging a plurality of electronic devices in parallel. Based on the wireless charging device including a plurality of inverter circuits, a plurality of first charging branches and a plurality of second charging branches, the wireless charging device supports charging an electronic device corresponding to one of the plurality of first charging branches and an electronic device corresponding to each of the plurality of second charging branches in parallel. The electronic device includes a large-sized electronic device or a small-sized electronic device.

[0008] In another embodiment, the wireless charging device includes an inverter circuit and corresponding first charging branches, and the inverter circuit is electrically connected to the first charging branches. Alternatively, the wireless charging device includes several inverter circuits, several first charging branches and several second charging branches, wherein one inverter circuit is electrically connected to the first charging branches, and the remaining inverter circuits are each electrically connected to the corresponding second charging branches.

[0009] In another embodiment, before obtaining the Q value of the first transmitting coil and the Q value of the second transmitting coil, the method further includes: outputting a first drive signal in a first time period of each control cycle, the first drive signal being used to control the first switch tube connected in series with the first transmitting coil to turn on and the second switch tube connected in series with the second transmitting coil to turn off, so that the first transmitting coil is powered on and the second transmitting coil is powered off. And, outputting a second drive signal in a second time period of each control cycle, the second drive signal being used to control the first switch tube to turn off and the second switch tube to turn on, so that the first transmitting coil is powered off and the second transmitting coil is powered on.

[0010] In this embodiment, based on the wireless charging device including an inverter circuit and a plurality of first charging branches, and the plurality of first charging branches include a first charging branch corresponding to a large-size electronic device and a first charging branch corresponding to a small-size electronic device, or based on the wireless charging device including a plurality of inverter circuits, a plurality of first charging branches and a plurality of second charging branches, and the plurality of first charging branches include a first charging branch corresponding to a large-size electronic device and a first charging branch corresponding to a small-size electronic device, and the plurality of second charging branches include a second charging branch corresponding to a large-size electronic device or a second charging branch corresponding to a small-size electronic device, the wireless charging device supports alternating detection of Q values ​​for large-size electronic devices and small-size electronic devices.

[0011] In another embodiment, the wireless charging device includes a plurality of inverter circuits and a plurality of corresponding second charging branches, and each of the plurality of inverter circuits is electrically connected to a corresponding second charging branch. Alternatively, the wireless charging device includes a plurality of inverter circuits, a plurality of first charging branches, and a plurality of second charging branches, wherein one inverter circuit is electrically connected to a plurality of first charging branches, and the remaining inverter circuits are electrically connected to a corresponding second charging branch.

[0012] In this embodiment, based on the fact that the wireless charging device includes a plurality of inverter circuits and a plurality of second charging branches, and the plurality of second charging branches include a second charging branch corresponding to a large-size electronic device and a second charging branch corresponding to a small-size electronic device, or based on the fact that the wireless charging device includes a plurality of inverter circuits, a plurality of first charging branches and a plurality of second charging branches, when the plurality of first charging branches include a first charging branch corresponding to a large-size electronic device, and the plurality of second charging branches include a second charging branch corresponding to a small-size electronic device, or when the plurality of first charging branches include a first charging branch corresponding to a small-size electronic device, and the plurality of second charging branches include a second charging branch corresponding to a large-size electronic device, the wireless charging device supports parallel detection of Q values ​​for large-size electronic devices and small-size electronic devices.

[0013] In another embodiment, based on determining that an electronic device is placed on the charging surface of the wireless charging device, the electronic device includes a first electronic device and / or a second electronic device, and the method further includes: performing a private protocol handshake with the electronic device. Based on a successful handshake, a private protocol data packet is received from the electronic device, the private protocol data packet includes the maximum power supported by the electronic device. Based on a failed handshake, a Qi protocol data packet is received from the electronic device, the Qi protocol data packet includes the maximum power supported by the electronic device.

[0014] In this embodiment, based on determining that an electronic device is placed on the charging surface of the wireless charging device and the wireless charging device supports parallel detection of Q values ​​for multiple electronic devices, the wireless charging device communicates with the electronic device that supports the private protocol through the private protocol, and communicates with the electronic device that does not support the private protocol through the Qi protocol.

[0015] In another embodiment, after receiving a private protocol data packet from a first electronic device and a Qi protocol data packet from a second electronic device, the method further includes: generating a plurality of power allocation schemes according to the maximum power supported by the first electronic device and the power, temperature, and charging strategy of the first electronic device, and sending the plurality of power allocation schemes to the first electronic device. Generating an optimal power allocation scheme according to the maximum power supported by the second electronic device and the power, temperature, and charging strategy of the second electronic device, and sending the optimal power allocation scheme to the second electronic device. The power allocation priority of the first electronic device is higher than the power allocation priority of the second electronic device.

[0016] In this embodiment, based on the wireless charging device receiving the private protocol data packet sent by the small-sized electronic device and the Qi protocol data packet sent by the large-sized electronic device, the wireless charging device sends several power allocation schemes to the small-sized electronic device so that the small-sized electronic device can actively select the power allocation scheme, and sends a single optimal power allocation scheme to the large-sized electronic device.

[0017] In other embodiments, based on the wireless charging device receiving a private protocol data packet sent by a large-sized electronic device and a Qi protocol data packet sent by a small-sized electronic device, the wireless charging device sends several power allocation schemes to the large-sized electronic device so that the large-sized electronic device can actively select a power allocation scheme, and sends a single optimal power allocation scheme to the small-sized electronic device.

[0018] According to a second aspect of an embodiment of the present application, there is provided a wireless charging device, which includes a controller and a plurality of transmitting coils, wherein the transmitting coil includes a first transmitting coil or a second transmitting coil, and the size of the second transmitting coil is larger than the size of the first transmitting coil. The controller is used to obtain the Q value of the first transmitting coil and the Q value of the second transmitting coil based on the power-on of the wireless charging device. Based on the difference between the Q values ​​of the first transmitting coil detected twice adjacently being greater than or equal to the first difference threshold, it is determined that a first electronic device is placed on the charging surface corresponding to the first transmitting coil, and the first transmitting coil is controlled to charge the first electronic device. Based on the difference between the Q values ​​of the second transmitting coil detected twice adjacently being greater than or equal to the second difference threshold, it is determined that a second electronic device is placed on the charging surface corresponding to the second transmitting coil, and the second transmitting coil is controlled to charge the second electronic device.

[0019] It can be understood that the specific implementation and beneficial effects of the wireless charging device provided in the second aspect of the embodiment of the present application are the same as the specific implementation and beneficial effects of the wireless charging method provided in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic diagram of the structure of a wireless charging system provided by an example.

[0021] Figure 2 This is a schematic diagram of a wireless charging scenario provided in Example 1.

[0022] Figure 3 It is a schematic diagram of the external structure of the wireless charging device provided in Example 1.

[0023] Figure 4 yes Figure 3 A front view of the first coil layer of the wireless charging device is shown.

[0024] Figure 5 yes Figure 3 A front view of the second coil layer of the wireless charging device is shown.

[0025] Figure 6 An example is provided Figure 3 The circuit schematic diagram of the wireless charging device shown.

[0026] Figure 7 yes Figure 6 Flow chart of the wireless charging method corresponding to the circuit shown.

[0027] Figure 8 Another example provided Figure 3 The circuit schematic diagram of the wireless charging device shown.

[0028] Fig. 9 yes Figure 8 Flow chart of the wireless charging method corresponding to the circuit shown.

[0029] Fig.10 It is a front view of the coil layer of the wireless charging device provided in the second embodiment.

[0030] Fig.11 This is a front view of the first coil layer of the wireless charging device provided in Example 3.

[0031] Fig.12 It is a front view of the second coil layer of the wireless charging device provided in the third embodiment.

[0032] Fig.13 This is a circuit schematic diagram of a wireless charging device provided as an example of the third embodiment.

[0033] Fig.14 yes Fig.13 Flow chart of the wireless charging method corresponding to the circuit shown.

[0034] Fig.15 It is a circuit schematic diagram of a wireless charging device provided in another example of the third embodiment.

[0035] Fig.16 yes Fig.15 Flow chart of the wireless charging method corresponding to the circuit shown. DETAILED DESCRIPTION

[0036] It should be noted that in the embodiments of the present application, "several" refers to one or more, and "multiple" refers to two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", etc. in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0037] It should also be noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchangeable with each other, and some of the steps can also be deleted.

[0038] In the embodiments of the present application, directional terms such as "upper" and "lower" may include, but are not limited to being defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative description and clarification, and may change accordingly according to changes in the orientation of the components placed in the drawings.

[0039] In addition, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0040] Figure 1 The present invention is a schematic diagram of the structure of a wireless charging system provided by an example.

[0041] like Figure 1 As shown, the wireless charging system 10 includes a wireless charging device 100 and an electronic device 200. The wireless charging device 100 includes a transmitting coil 110, and the electronic device 200 includes a receiving coil 210 and a battery 220. Based on the electronic device 200 being placed on the wireless charging device 100, after the wireless charging device 100 is powered on, the alternating current on the transmitting coil 110 generates a changing magnetic field. The receiving coil 210 of the electronic device 200 senses the change in the magnetic field to generate an induced current, and then converts the induced current into a direct current to charge the battery 220.

[0042] As the types of electronic devices gradually increase, the types of wireless charging devices that match electronic devices also gradually increase. For example, the wireless charging devices that match electronic devices such as smartphones, smart watches, and wireless Bluetooth headsets are different. The bundling of wireless charging devices with electronic devices brings inconvenience to users and increases the cost of use for users. Wireless charging devices that charge a single type of electronic device can no longer meet the market demand for multi-device adaptation.

[0043] Based on this, the embodiments of the present application provide a wireless charging method and device, aiming to solve the problem of how to improve the compatibility of wireless charging devices.

[0044] In the embodiment of the present application, the types of electronic devices can be divided into large-sized electronic devices and small-sized electronic devices according to the size difference of the receiving coil. For example, the size of the receiving coil of the large-sized electronic device is greater than or equal to the size threshold, and the size of the receiving coil of the small-sized electronic device is less than the size threshold. The size threshold can be set as needed.

[0045] Exemplarily, large-sized electronic devices may include, but are not limited to, smart phones, tablet computers, personal computers, e-book readers, etc. Small-sized electronic devices include smart wearable products, such as smart watches, smart bracelets, wireless Bluetooth headsets, etc.

[0046] It can be understood that the size of the transmitting coil of the wireless charging device matches the size of the receiving coil of the electronic device. The large-sized transmitting coil is adapted to the receiving coil of the large-sized electronic device, and the small-sized transmitting coil is adapted to the receiving coil of the small-sized electronic device. Therefore, by integrating the large-sized transmitting coil and the small-sized transmitting coil on the wireless charging device, it can charge both large-sized electronic devices and small-sized electronic devices, thereby improving the compatibility of the wireless charging device.

[0047] The structure of the wireless charging device and the corresponding wireless charging method are described in detail below in conjunction with Embodiments 1 to 4.

[0048] Embodiment 1

[0049] Figure 2 Schematic diagram of wireless charging scenario provided by Example 1. Figure 2 As shown, the wireless charging device 100 includes two charging surfaces. One of the charging surfaces includes a small-sized transmitting coil for charging a small-sized electronic device 200, such as a smart watch. The other charging surface includes a large-sized transmitting coil for charging a large-sized electronic device 300, such as a smart phone.

[0050] It can be understood that in other embodiments, the wireless charging device may include one or more than two charging surfaces, each charging surface includes a corresponding number of transmitting coils, and one charging surface may include transmitting coils of different sizes.

[0051] Figure 3 Schematic diagram of the external structure of the wireless charging device provided in Example 1. Figure 3 As shown, the external structure of the wireless charging device 100 is disc-shaped, including a first charging surface 101, a second charging surface 102 and a side surface 103. The first charging surface 101 and the second charging surface 102 are arranged opposite to each other, and the side surface 103 connects the first charging surface 101 and the second charging surface 102.

[0052] Figure 4 yes Figure 3 The front view of the first coil layer of the wireless charging device shown in FIG. Figure 4 As shown, the wireless charging device 100 includes a first coil layer 105, and the first coil layer 105 is arranged corresponding to the first charging surface 101. The first coil layer 105 includes a first transmitting coil Coil1, a first magnet 1051, a second magnet 1053, a first magnetic plate 1052 and a second magnetic plate 1054. Among them, the first magnet 1051 is arranged at the center of the first coil layer 105. The second magnet 1053 is composed of a plurality of magnetic blocks arranged at intervals and is arranged at the outermost position of the first coil layer 105. The first magnetic plate 1052 is arranged around the first magnet 1051, the first transmitting coil Coil1 is arranged around the first magnetic plate 1052, the second magnetic plate 1054 is arranged around the first transmitting coil Coil1, and the second magnet 1053 is arranged around the second magnetic plate 1054.

[0053] In this embodiment, the first transmitting coil Coil1 is a small-sized transmitting coil used to charge a small-sized electronic device. The first magnet 1051, the second magnet 1053, the first magnetic plate 1052 and the second magnetic plate 1054 are all used to fix the small-sized electronic device in a magnetic attraction manner.

[0054] Figure 5 yes Figure 3 A front view of the second coil layer of the wireless charging device shown. Figure 5As shown, the wireless charging device 100 also includes a second coil layer 107, and the second coil layer 107 is arranged corresponding to the second charging surface 102. The second coil layer 107 includes a second transmitting coil Coil2, a third magnet 1071, a third magnetic plate 1072 and a fourth magnetic plate 1074. Among them, the third magnetic plate 1072 is arranged at the center position of the second coil layer 107, and the third magnet 1071 is arranged at the outermost position of the second coil layer 107. The second transmitting coil Coil2 is arranged around the third magnetic plate 1072, the fourth magnetic plate 1074 is arranged around the second transmitting coil Coil2, and the third magnet 1071 is arranged around the fourth magnetic plate 1074.

[0055] In this embodiment, the second transmitting coil Coil2 is a large-sized transmitting coil, which is used to charge large-sized electronic devices. The third magnet 1071, the third magnetic plate 1072 and the fourth magnetic plate 1074 are all used to fix the large-sized electronic device in a magnetic attraction manner.

[0056] In the embodiment of the present application, the circuit structure of the wireless charging device includes an inverter circuit and a resonant circuit. The resonant circuit includes a transmitting coil and a capacitor. The inverter circuit is used to convert the DC current output by the DC power supply into an AC current, and the inverter circuit may include a full-bridge circuit or a half-bridge circuit.

[0057] Figure 6 An example is provided Figure 3 The circuit schematic diagram of the wireless charging device shown in FIG. Figure 6As shown, the circuit structure of the wireless charging device 100 includes switch tubes Q1 to Q8, capacitors C1 and C2, a first transmitting coil Coil1 and a second transmitting coil Coil2, and a controller (not shown). Among them, the gates of the switch tubes Q1 to Q8 are electrically connected to the controller. The switch tubes Q1 to Q4 form a full-bridge circuit, the source of the switch tube Q1 is electrically connected to the drain of the switch tube Q2, the source of the switch tube Q3 is electrically connected to the drain of the switch tube Q4, the drain of the switch tube Q1 and the drain of the switch tube Q3 are both electrically connected to the negative output terminal V- of the voltage source Vin, and the source of the switch tube Q2 and the source of the switch tube Q4 are both electrically connected to the positive output terminal V+ of the voltage source Vin. The switch tube Q5, the capacitor C1, the first transmitting coil Coil1 and the switch tube Q6 are connected in series to form a first branch, one end of the first branch (i.e., the drain of the switch tube Q5) is connected between the source of the switch tube Q1 and the drain of the switch tube Q2, and the other end of the first branch (i.e., the source of the switch tube Q6) is connected between the source of the switch tube Q3 and the drain of the switch tube Q4. The switch tube Q7, the capacitor C2, the second transmitting coil Coil2 and the switch tube Q8 are connected in series to form a second branch, the second branch is connected in parallel with the first branch, one end of the second branch (i.e., the drain of the switch tube Q7) is connected between the source of the switch tube Q1 and the drain of the switch tube Q2, and the other end of the second branch (i.e., the source of the switch tube Q8) is connected between the source of the switch tube Q3 and the drain of the switch tube Q4.

[0058] The full-bridge circuit is used to convert the direct current output by the voltage source Vin into alternating current.

[0059] In this embodiment, the wireless charging device 100 controls the switch tubes Q5 and Q6 on the first branch to be turned on, and the switch tubes Q7 and Q8 on the second branch to be turned off, thereby controlling the first transmitting coil Coil1 to be powered on and the second transmitting coil Coil2 to be powered off, so as to charge the small-sized electronic device through the first transmitting coil Coil1. The wireless charging device 100 controls the switch tubes Q7 and Q8 on the second branch to be turned on, and the switch tubes Q5 and Q6 on the first branch to be turned off, thereby controlling the second transmitting coil Coil2 to be powered on and the first transmitting coil Coil1 to be powered off, so as to charge the large-sized electronic device through the second transmitting coil Coil2.

[0060] It is understood that in other embodiments, the switch tube Q5 or the switch tube Q6 can be removed from the first branch. Similarly, the switch tube Q7 or the switch tube Q8 can be removed from the second branch.

[0061] Figure 7 yes Figure 6 The wireless charging method is applied to the wireless charging device provided in the first embodiment. Figure 7 As shown, the wireless charging method includes the following steps:

[0062] S101, power on the wireless charging device.

[0063] S102, outputting a first driving signal in a first time period of each control cycle, where the first driving signal is used to control the first transmitting coil to be powered on, so as to obtain a Q value of the first transmitting coil.

[0064] S103, outputting a second driving signal in a second time period of each control cycle, where the second driving signal is used to control the second transmitting coil to be powered on, so as to obtain a Q value of the second transmitting coil.

[0065] Each control cycle includes a first time period and a second time period. In each control cycle, the wireless charging device 100 performs steps S102 and S103 to alternately detect the Q value of the first transmitting coil Coil1 and the Q value of the second transmitting coil Coil2.

[0066] In this embodiment, after the wireless charging device 100 is powered on, the controller outputs a first driving signal in the first time period of each control cycle, and the first driving signal controls the switch tubes Q5 and Q6 on the first branch to be turned on, and the switch tubes Q7 and Q8 on the second branch to be turned off, thereby controlling the first transmitting coil Coil1 to be powered on and the second transmitting coil Coil2 to be powered off, so as to detect the Q value of the first transmitting coil Coil1. The controller outputs a second driving signal in the second time period of each control cycle, and the second driving signal controls the switch tubes Q7 and Q8 on the second branch to be turned on, and the switch tubes Q5 and Q6 on the first branch to be turned off, thereby controlling the second transmitting coil Coil2 to be powered on and the first transmitting coil Coil1 to be powered off, so as to detect the Q value of the second transmitting coil Coil2.

[0067] The wireless charging device 100 can determine whether a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil Coil1 and whether a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil Coil2 by alternately detecting the Q value of the first transmitting coil Coil1 and the Q value of the second transmitting coil Coil2.

[0068] It is understood that the embodiment of the present application does not limit the method for detecting the Q value. Exemplarily, the Q value of the transmitting coil can be calculated based on the inductance, AC impedance and resonant frequency of the transmitting coil.

[0069] S104, in the first time period of the Nth control cycle, based on the difference between the Q values ​​of the first transmitting coil detected twice adjacently being greater than or equal to a first difference threshold, determining that a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil.

[0070] Wherein, N is a positive integer greater than 1. The first difference threshold can be set as required.

[0071] S105, stop detecting the Q value of the second transmitting coil.

[0072] In this embodiment, after determining that a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil Coil1 , the Q value of the second transmitting coil Coil2 is no longer detected, thereby maintaining the first transmitting coil Coil1 powered on.

[0073] S106, charging the small-sized electronic device through the first transmitting coil.

[0074] In this embodiment, after determining that a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil Coil1 , the small-sized electronic device is charged, thereby reducing energy waste.

[0075] In other embodiments, in the second time period of the Nth control cycle, based on the difference between the Q values ​​of the second transmitting coil detected twice in a row being greater than or equal to the second difference threshold, it is determined that a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil. The second difference threshold can be set as needed. After determining that a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil, the Q value of the first transmitting coil is stopped from being detected, and the large-sized electronic device is charged through the second transmitting coil.

[0076] Figure 8 Another example provided Figure 3 The circuit schematic diagram of the wireless charging device shown in FIG. Figure 6 Compared with the circuit structure shown in FIG. 1 , in this embodiment, the first transmitting coil Coil1 and the second transmitting coil Coil2 are respectively configured with corresponding full-bridge circuits, so that the first transmitting coil Coil1 and the second transmitting coil Coil2 are charged independently of each other.

[0077] Specifically, if Figure 8As shown, the circuit structure of the wireless charging device 100 includes switch tubes Q1 to Q8, capacitors C1 and C2, a first transmitting coil Coil1 and a second transmitting coil Coil2, and a controller (not shown). Among them, the gates of the switch tubes Q1 to Q8 are electrically connected to the controller. The switch tubes Q1 to Q4 form a first full-bridge circuit, the source of the switch tube Q1 is electrically connected to the drain of the switch tube Q2, the source of the switch tube Q3 is electrically connected to the drain of the switch tube Q4, the drain of the switch tube Q1 and the drain of the switch tube Q3 are both electrically connected to the first negative output terminal V1- of the voltage source Vin, and the source of the switch tube Q2 and the source of the switch tube Q4 are both electrically connected to the first positive output terminal V1+ of the voltage source Vin. The capacitor C1 and the first transmitting coil Coil1 are connected in series, one end of the capacitor C1 is connected between the source of the switch tube Q1 and the drain of the switch tube Q2, the other end of the capacitor C1 is connected to one end of the first transmitting coil Coil1, and the other end of the first transmitting coil Coil1 is connected between the source of the switch tube Q3 and the drain of the switch tube Q4. The switch tubes Q5 to Q8 form a second full-bridge circuit, the source of the switch tube Q5 is electrically connected to the drain of the switch tube Q6, the source of the switch tube Q7 is electrically connected to the drain of the switch tube Q8, the drain of the switch tube Q5 and the drain of the switch tube Q7 are both electrically connected to the second negative output terminal V2- of the voltage source Vin, and the source of the switch tube Q6 and the source of the switch tube Q8 are both electrically connected to the second positive output terminal V2+ of the voltage source Vin. The capacitor C2 and the second transmitting coil Coil2 are connected in series, one end of the capacitor C2 is connected between the source of the switch tube Q5 and the drain of the switch tube Q6, the other end of the capacitor C2 is connected to one end of the second transmitting coil Coil2, and the other end of the second transmitting coil Coil2 is connected between the source of the switch tube Q7 and the drain of the switch tube Q8.

[0078] Fig. 9 yes Figure 8 The wireless charging method is applied to the wireless charging device provided in the first embodiment. Fig. 9 As shown, the wireless charging method includes the following steps:

[0079] S201, power on the wireless charging device.

[0080] S202: Obtain a Q value of the first transmitting coil.

[0081] S203: Determine that a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil based on the difference in the Q value of the first transmitting coil detected twice adjacently being greater than or equal to a first difference threshold.

[0082] S204, performing a private protocol handshake with the small-sized electronic device.

[0083] In this embodiment, the wireless charging device 100 supports a private protocol and a Qi protocol. The private protocol is a wireless charging protocol customized by the manufacturer, and the Qi protocol is a universal wireless charging protocol. The wireless charging device 100 preferentially uses the private protocol to communicate with the electronic device. When the electronic device does not support the private protocol, the wireless charging device 100 uses the Qi protocol to communicate with the electronic device.

[0084] The private protocol handshake is a negotiation process for the wireless charging device 100 to establish a communication connection with the electronic device through a private protocol, which is used to determine whether the electronic device supports the private protocol. Exemplarily, the private protocol handshake includes: the wireless charging device 100 sends a request packet to the electronic device through a private protocol, and the request packet is used to request the establishment of a communication connection; the electronic device responds to the request packet and sends a response packet to the wireless charging device 100 through a private protocol, and the response packet is used to confirm the establishment of the communication connection. If the wireless charging device 100 receives the response packet within a preset time period, it is determined that the handshake is successful, indicating that the electronic device supports the private protocol. If the wireless charging device 100 does not receive the response packet within the preset time period, it is determined that the handshake fails, indicating that the electronic device does not support the private protocol.

[0085] S205, determining whether the handshake is successful.

[0086] If yes, execute step S206; if no, execute step S207.

[0087] S206, based on the success of the handshake, receiving a private protocol data packet from the small-sized electronic device.

[0088] S207 , based on the handshake failure, receiving a Qi protocol data packet from the small-sized electronic device.

[0089] In this embodiment, after the handshake succeeds, the electronic device reports a private protocol data packet to the wireless charging device 100. The private protocol data packet is a data packet transmitted via a private protocol, including the maximum power supported by the electronic device. After the handshake fails, the electronic device reports a Qi protocol data packet to the wireless charging device 100. The Qi protocol data packet is a data packet transmitted via the Qi protocol, including the maximum power supported by the electronic device.

[0090] S208, obtaining the Q value of the second transmitting coil.

[0091] In this embodiment, after the wireless charging device 100 is powered on, the first transmitting coil Coil1 and the second transmitting coil Coil2 are powered on, and the wireless charging device 100 detects the Q value of the first transmitting coil Coil1 and the Q value of the second transmitting coil Coil2 in parallel.

[0092] S209: Determine that a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil based on the difference in the Q value of the second transmitting coil detected twice adjacently being greater than or equal to a second difference threshold.

[0093] S210, perform a private protocol handshake with the large-size electronic device.

[0094] S211, determine whether the handshake is successful.

[0095] S212, based on the successful handshake, receiving a private protocol data packet from the large-size electronic device.

[0096] S213, based on the handshake failure, receiving a Qi protocol data packet from the large-size electronic device.

[0097] In this embodiment, the wireless charging device 100 supports charging a small-sized electronic device and a large-sized electronic device at the same time. The sum of the maximum power supported by the large-sized electronic device and the maximum power supported by the small-sized electronic device is less than or equal to the maximum power supported by the wireless charging device 100.

[0098] S214, determining whether there is any electronic device with which handshake succeeded.

[0099] If yes, execute step S215; if no, execute step S216.

[0100] S215, executing an active power allocation strategy based on the electronic devices that have successfully completed the handshake.

[0101] In this embodiment, executing the active power allocation strategy includes: generating a plurality of power allocation schemes according to the maximum power supported by the electronic device and the power, temperature, and charging strategy of the electronic device, and sending the plurality of power allocation schemes to the electronic device. The power allocation scheme includes the power allocated to the electronic device and the power allocation priority. Exemplarily, the power allocation priority of the electronic device supporting the private protocol is higher than the power allocation priority of the electronic device supporting the Qi protocol.

[0102] In one embodiment, based on the electronic device being equipped with a display screen, the wireless charging device 100 sends several power allocation schemes to the electronic device. After receiving the several power allocation schemes, the electronic device displays a power allocation interface on the display screen. The power allocation interface displays several power allocation schemes, and the several power allocation schemes are available for the user to select independently. The several power allocation schemes can be obtained by the wireless charging device 100 executing different power allocation algorithms. The wireless charging device 100 can recommend the optimal power allocation scheme according to the actual scenario.

[0103] In another embodiment, based on the fact that the electronic device is not equipped with a display screen, the wireless charging device 100 sends several power allocation schemes to the electronic device. After receiving the several power allocation schemes, the electronic device forwards the several power allocation schemes to the display device through the trust ring. After receiving the several power allocation schemes, the display device displays a power allocation interface on the display screen, and the power allocation interface displays several power allocation schemes, and the several power allocation schemes are available for users to choose independently. Among them, the trust ring is a cross-device interaction protocol customized by the manufacturer, and the electronic device communicates with the display device through the trust ring.

[0104] S216: Execute a passive power allocation strategy based on the electronic devices that did not successfully handshake.

[0105] In this embodiment, executing the passive power allocation strategy includes: generating an optimal power allocation plan based on the maximum power supported by the electronic device and the power, temperature, and charging strategy of the electronic device, and sending the optimal power allocation plan to the electronic device. Exemplarily, power is preferentially allocated to electronic devices whose power is lower than the power threshold, and the power allocation priority is set according to different power gradients. The power allocation plan is dynamically adjusted according to the thermal current limiting strategy of the wireless charging device 100 and the electronic device. Since the electronic device will reduce the charging power in scenarios such as charging with the screen on, the power allocation plan is adjusted in the preset scenario to allocate more power to other electronic devices outside the preset scenario.

[0106] Embodiment 2

[0107] Compared with the wireless charging device provided in the first embodiment, in this embodiment, the first transmitting coil Coil1 and the second transmitting coil Coil2 of the wireless charging device are arranged in the same coil layer.

[0108] Fig.10 1 is a front view of the coil layer of the wireless charging device provided in Example 2. Fig.10As shown, the wireless charging device 100 includes a coil layer 104, and the coil layer 104 is arranged corresponding to the first charging surface 101. The coil layer 104 includes a first transmitting coil Coil1, a second transmitting coil Coil2, a first magnet 1041, a second magnet 1043, a first magnetic plate 1042, a second magnetic plate 1044 and a third magnetic plate 1046. Among them, the first magnet 1041 is arranged at the center of the coil layer 104. The second magnet 1043 is composed of a plurality of magnetic blocks arranged at intervals and is arranged at the outermost position of the coil layer 104. The first magnetic plate 1042 is arranged around the first magnet 1041, the first transmitting coil Coil1 is arranged around the first magnetic plate 1042, the second magnetic plate 1044 is arranged around the first transmitting coil Coil1, the second transmitting coil Coil2 is arranged around the second magnetic plate 1044, the third magnetic plate 1046 is arranged around the second transmitting coil Coil2, and the second magnet 1043 is arranged around the third magnetic plate 1046.

[0109] In this embodiment, the first transmitting coil Coil1 is a small-sized transmitting coil for charging a small-sized electronic device. The second transmitting coil Coil2 is a large-sized transmitting coil for charging a large-sized electronic device. The first magnet 1041, the second magnet 1043, the first magnetic plate 1042, the second magnetic plate 1044 and the third magnetic plate 1046 are all used to fix a small-sized electronic device or a large-sized electronic device by magnetic attraction.

[0110] In other embodiments, the coil layer 104 may be disposed corresponding to the second charging surface 102 .

[0111] It can be understood that the external structure of the wireless charging device provided in the second embodiment is similar to that provided in the first embodiment. Figure 3 The circuit structure of the wireless charging device provided in the second embodiment is the same as that provided in the first embodiment. Figure 6 The wireless charging method provided in the second embodiment is the same as that provided in the first embodiment. Figure 7 The wireless charging method shown is the same.

[0112] Embodiment 3

[0113] Compared with the wireless charging device provided in the second embodiment, in this embodiment, the wireless charging device further includes a third transmitting coil Coil3, the first transmitting coil Coil1 and the second transmitting coil Coil2 are arranged in the first coil layer, and the third transmitting coil Coil3 is arranged in the second coil layer.

[0114] Fig.11 1 is a front view of the first coil layer of the wireless charging device provided in Example 3. Fig.11As shown, the first coil layer 106 is arranged corresponding to the first charging surface 101. The first coil layer 106 includes a first transmitting coil Coil1, a second transmitting coil Coil2, a first magnet 1061, a second magnet 1063, a first magnetic plate 1062, a second magnetic plate 1064 and a third magnetic plate 1066. Among them, the first magnet 1061 is arranged at the center of the first coil layer 106. The second magnet 1063 is composed of a plurality of magnetic blocks arranged at intervals and is arranged at the outermost position of the first coil layer 106. The first magnetic plate 1062 is arranged around the first magnet 1061, the first transmitting coil Coil1 is arranged around the first magnetic plate 1062, the second magnetic plate 1064 is arranged around the first transmitting coil Coil1, the second transmitting coil Coil2 is arranged around the second magnetic plate 1064, the third magnetic plate 1066 is arranged around the second transmitting coil Coil2, and the second magnet 1063 is arranged around the third magnetic plate 1066.

[0115] In this embodiment, the first transmitting coil Coil1 is a small-sized transmitting coil for charging a small-sized electronic device. The second transmitting coil Coil2 is a large-sized transmitting coil for charging a large-sized electronic device. The first magnet 1061, the second magnet 1063, the first magnetic plate 1062, the second magnetic plate 1064 and the third magnetic plate 1066 are all used to fix a small-sized electronic device or a large-sized electronic device by magnetic attraction.

[0116] Fig.12 1 is a front view of the second coil layer of the wireless charging device provided in Example 3. Fig.12 As shown, the second coil layer 108 is arranged corresponding to the second charging surface 102. The second coil layer 108 includes a third transmitting coil Coil3, a third magnet 1081, a fourth magnet 1083, a fourth magnetic plate 1082 and a fifth magnetic plate 1084. Among them, the third magnet 1081 is arranged at the center of the second coil layer 108. The fourth magnet 1083 is composed of a plurality of magnetic blocks arranged at intervals and is arranged at the outermost position of the second coil layer 108. The fourth magnetic plate 1082 is arranged around the third magnet 1081, the third transmitting coil Coil3 is arranged around the fourth magnetic plate 1082, the fifth magnetic plate 1084 is arranged around the third transmitting coil Coil3, and the fourth magnet 1083 is arranged around the fifth magnetic plate 1084.

[0117] In this embodiment, the third transmitting coil Coil3 is a small-sized transmitting coil used to charge a small-sized electronic device. The third magnet 1081, the fourth magnet 1083, the fourth magnetic plate 1082 and the fifth magnetic plate 1084 are all used to fix the small-sized electronic device in a magnetic attraction manner.

[0118] In some embodiments, the third transmitting coil Coil3 is a large-sized transmitting coil for charging large-sized electronic devices. Figure 5 The front view of the second coil layer is shown to be the same.

[0119] In some other embodiments, the wireless charging device further includes a fourth transmitting coil Coil4, which is disposed in the same coil layer as the third transmitting coil Coil3, and the fourth transmitting coil Coil4 is a large-sized transmitting coil. Fig.11 The front view of the first coil layer is shown identically.

[0120] Fig.13 1 is a circuit diagram of a wireless charging device provided in an example of the third embodiment. Figure 6 Compared with the circuit structure shown in FIG. 1 , in this embodiment, the circuit structure of the wireless charging device further includes a switch tube Q9, a switch tube Q10, a capacitor C3 and a third transmitting coil Coil3. The gates of the switch tubes Q9 and Q10 are both electrically connected to the controller. Fig.13 As shown, the switch tube Q9, the capacitor C3, the third transmitting coil Coil3 and the switch tube Q10 are connected in series to form a third branch, the third branch is connected in parallel with the first branch and the second branch, one end of the third branch (i.e., the drain of the switch tube Q9) is connected between the source of the switch tube Q1 and the drain of the switch tube Q2, and the other end of the third branch (i.e., the source of the switch tube Q10) is connected between the source of the switch tube Q3 and the drain of the switch tube Q4.

[0121] In this embodiment, the wireless charging device controls the switch tubes Q9 and Q10 on the third branch to be turned on, the switch tubes Q5 and Q6 on the first branch to be turned off, and the switch tubes Q7 and Q8 on the second branch to be turned off through the controller, thereby controlling the third transmitting coil Coil3 to be powered on, the first transmitting coil Coil1 to be powered off, and the second transmitting coil Coil2 to be powered off, so as to charge the small-sized electronic device through the third transmitting coil Coil3.

[0122] It can be understood that in other embodiments, the switch tube Q9 or the switch tube Q10 can be removed from the third branch.

[0123] Fig.14 yes Fig.13 The wireless charging method is applied to the wireless charging device provided in Example 3. Fig.14 As shown, the wireless charging method includes the following steps:

[0124] S301, the wireless charging device is powered on.

[0125] S302, outputting a first driving signal in a first time period of each control cycle, where the first driving signal is used to control the first transmitting coil to be powered on, so as to obtain a Q value of the first transmitting coil.

[0126] S303, outputting a second driving signal in a second time period of each control cycle, where the second driving signal is used to control the second transmitting coil to be powered on, so as to obtain a Q value of the second transmitting coil.

[0127] S304, outputting a third driving signal in a third time period of each control cycle, where the third driving signal is used to control the third transmitting coil to be powered on, so as to obtain a Q value of the third transmitting coil.

[0128] Each control cycle includes a first time period, a second time period, and a third time period. In each control cycle, the wireless charging device executes steps S302, S303, and S304, thereby alternately detecting the Q value of the first transmitting coil Coil1, the Q value of the second transmitting coil Coil2, and the Q value of the third transmitting coil Coil3.

[0129] In this embodiment, after the wireless charging device 100 is powered on, the controller outputs a first driving signal in the first time period of each control cycle, and the first driving signal controls the switch tubes Q5 and Q6 on the first branch to be turned on, the switch tubes Q7 and Q8 on the second branch to be turned off, and the switch tubes Q9 and Q10 on the third branch to be turned off, thereby controlling the first transmitting coil Coil1 to be powered on, the second transmitting coil Coil2 to be powered off, and the third transmitting coil Coil3 to be powered off, so as to detect the Q value of the first transmitting coil Coil1. The controller outputs a second driving signal in the second time period of each control cycle, and the second driving signal controls the switch tubes Q7 and Q8 on the second branch to be turned on, the switch tubes Q5 and Q6 on the first branch to be turned off, and the switch tubes Q9 and Q10 on the third branch to be turned off, thereby controlling the second transmitting coil Coil2 to be powered on, the first transmitting coil Coil1 to be powered off, and the third transmitting coil Coil3 to be powered off, so as to detect the Q value of the second transmitting coil Coil2. The controller outputs a third driving signal in a third time period of each control cycle. The third driving signal controls the switch tubes Q9 and Q10 on the third branch to be turned on, the switch tubes Q5 and Q6 on the first branch to be turned off, and the switch tubes Q7 and Q8 on the second branch to be turned off, thereby controlling the third transmitting coil Coil3 to be powered on, the first transmitting coil Coil1 to be powered off, and the second transmitting coil Coil2 to be powered off, so as to detect the Q value of the third transmitting coil Coil3.

[0130] The wireless charging device 100 can determine whether a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil Coil1, determine whether a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil Coil2, and determine whether a small-sized electronic device is placed on the charging surface corresponding to the third transmitting coil Coil3 by alternately detecting the Q value of the first transmitting coil Coil1, the Q value of the second transmitting coil Coil2, and the Q value of the third transmitting coil Coil3.

[0131] S305, in the first time period of the Nth control cycle, based on the difference between the Q values ​​of the first transmitting coil detected twice adjacently being greater than or equal to a first difference threshold, determining that a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil.

[0132] S306, stop detecting the Q value of the second transmitting coil and the Q value of the third transmitting coil.

[0133] S307: charging the corresponding small-sized electronic device through the first transmitting coil.

[0134] In this embodiment, after determining that a small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil Coil1, the Q value of the second transmitting coil Coil2 and the Q value of the third transmitting coil Coil3 are no longer detected, thereby maintaining the first transmitting coil Coil1 powered on. In addition, the small-sized electronic device corresponding to the first transmitting coil Coil1 is charged, thereby reducing energy waste.

[0135] In some embodiments, in the second time period of the Nth control cycle, based on the difference between the Q values ​​of the second transmitting coil detected twice in succession being greater than or equal to the second difference threshold, it is determined that a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil. After determining that a large-sized electronic device is placed on the charging surface corresponding to the second transmitting coil, the Q value of the first transmitting coil and the Q value of the third transmitting coil are stopped from being detected, and the large-sized electronic device is charged through the second transmitting coil.

[0136] In some other embodiments, in the third time period of the Nth control cycle, based on the difference between the Q values ​​of the third transmitting coil detected twice in a row being greater than or equal to the third difference threshold, it is determined that a small-sized electronic device is placed on the charging surface corresponding to the third transmitting coil. The third difference threshold can be set as needed. After determining that a small-sized electronic device is placed on the charging surface corresponding to the third transmitting coil, the Q value of the first transmitting coil and the Q value of the second transmitting coil are stopped, and the corresponding small-sized electronic device is charged through the third transmitting coil.

[0137] Fig.15 FIG. 1 is a circuit diagram of a wireless charging device provided in another example of Embodiment 3. Fig.13Compared with the circuit structure shown in FIG. 1 , in this embodiment, the third transmitting coil Coil3 is configured with a separate full-bridge circuit so that the third transmitting coil Coil3 is charged independently.

[0138] Specifically, if Fig.15 As shown, the circuit structure of the wireless charging device includes switch tubes Q1 to Q12, capacitors C1 to C3, first transmitting coils Coil1 to third transmitting coils Coil3 and a controller (not shown). Among them, the gates of switch tubes Q1 to Q12 are electrically connected to the controller. Switch tubes Q1 to Q4 form a first full-bridge circuit, the source of switch tube Q1 is electrically connected to the drain of switch tube Q2, the source of switch tube Q3 is electrically connected to the drain of switch tube Q4, the drain of switch tube Q1 and the drain of switch tube Q3 are both electrically connected to the first negative output terminal V1- of the voltage source Vin, and the source of switch tube Q2 and the source of switch tube Q4 are both electrically connected to the first positive output terminal V1+ of the voltage source Vin. The switch tube Q5, the capacitor C1, the first transmitting coil Coil1 and the switch tube Q6 are connected in series to form a first branch, one end of the first branch (i.e., the drain of the switch tube Q5) is connected between the source of the switch tube Q1 and the drain of the switch tube Q2, and the other end of the first branch (i.e., the source of the switch tube Q6) is connected between the source of the switch tube Q3 and the drain of the switch tube Q4. The switch tube Q7, the capacitor C2, the second transmitting coil Coil2 and the switch tube Q8 are connected in series to form a second branch, the second branch is connected in parallel with the first branch, one end of the second branch (i.e., the drain of the switch tube Q7) is connected between the source of the switch tube Q1 and the drain of the switch tube Q2, and the other end of the second branch (i.e., the source of the switch tube Q8) is connected between the source of the switch tube Q3 and the drain of the switch tube Q4. The switch tubes Q9 to Q12 form a second full-bridge circuit, the source of the switch tube Q9 is electrically connected to the drain of the switch tube Q10, the source of the switch tube Q11 is electrically connected to the drain of the switch tube Q12, the drain of the switch tube Q9 and the drain of the switch tube Q11 are both electrically connected to the second negative output terminal V2- of the voltage source Vin, and the source of the switch tube Q10 and the source of the switch tube Q12 are both electrically connected to the second positive output terminal V2+ of the voltage source Vin. The capacitor C3 and the third transmitting coil Coil3 are connected in series, one end of the capacitor C3 is connected between the source of the switch tube Q9 and the drain of the switch tube Q10, the other end of the capacitor C3 is connected to one end of the third transmitting coil Coil3, and the other end of the third transmitting coil Coil3 is connected between the source of the switch tube Q11 and the drain of the switch tube Q12.

[0139] Fig.16 yes Fig.15 The wireless charging method is applied to the wireless charging device provided in Example 3. Fig.16 As shown, the wireless charging method includes the following steps:

[0140] S401, power on the wireless charging device.

[0141] S402, outputting a first driving signal in a first time period of each control cycle, where the first driving signal is used to control the first transmitting coil to be powered on, so as to obtain a Q value of the first transmitting coil.

[0142] S403, outputting a second driving signal in a second time period of each control cycle, where the second driving signal is used to control the second transmitting coil to be powered on, so as to obtain a Q value of the second transmitting coil.

[0143] In this embodiment, each control cycle includes a first time period and a second time period. In each control cycle, the wireless charging device performs steps S402 and S403 to alternately detect the Q value of the first transmitting coil Coil1 and the Q value of the second transmitting coil Coil2.

[0144] S404: Determine that a first small-sized electronic device is placed on the charging surface corresponding to the first transmitting coil based on the difference in Q values ​​of the first transmitting coil detected twice adjacently being greater than or equal to a first difference threshold.

[0145] S405, stop detecting the Q value of the second transmitting coil.

[0146] S406, performing a private protocol handshake with the first small-sized electronic device.

[0147] S407, determine whether the handshake is successful.

[0148] If yes, execute step S408; if no, execute step S409.

[0149] S408 , based on the success of the handshake, receiving a private protocol data packet from the first small-sized electronic device.

[0150] S409: Based on the handshake failure, receive a Qi protocol data packet from the first small-sized electronic device.

[0151] S410: Obtain a Q value of the third transmitting coil.

[0152] In this embodiment, after the wireless charging device is powered on, the third transmitting coil Coil3 is powered on, and the wireless charging device independently detects the Q value of the third transmitting coil Coil3.

[0153] S411: Determine that a second small-sized electronic device is placed on the charging surface corresponding to the third transmitting coil based on the difference in Q values ​​of the third transmitting coil detected twice adjacently being greater than or equal to a third difference threshold.

[0154] S412, performing a private protocol handshake with the second smallest electronic device.

[0155] S413, determine whether the handshake is successful.

[0156] If yes, execute step S414; if no, execute step S415.

[0157] S414, based on the success of the handshake, receiving a private protocol data packet from the second smallest electronic device.

[0158] S415 , based on the handshake failure, receiving a Qi protocol data packet from the second smallest electronic device.

[0159] S416, determining whether there is any electronic device with which handshake succeeded.

[0160] If yes, execute step S417; if no, execute step S418.

[0161] S417, executing an active power allocation strategy based on the electronic devices that have successfully completed the handshake.

[0162] S418, executing a passive power allocation strategy based on the electronic devices that did not successfully handshake.

[0163] In this embodiment, the wireless charging device supports charging two small-sized electronic devices at the same time, or charging one large-sized electronic device and one small-sized electronic device at the same time. When the wireless charging device charges two small-sized electronic devices at the same time, if at least one of the two small-sized electronic devices supports a private protocol, an active power allocation strategy is executed. If neither of the two small-sized electronic devices supports a private protocol, a passive power allocation strategy is executed. Similarly, when the wireless charging device charges a large-sized electronic device and a small-sized electronic device at the same time, if at least one of the large-sized electronic device and the small-sized electronic device supports a private protocol, an active power allocation strategy is executed. If neither the large-sized electronic device nor the small-sized electronic device supports a private protocol, a passive power allocation strategy is executed.

[0164] It is understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the wireless charging device. In other embodiments, the wireless charging device may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently.

[0165] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A wireless charging method, applied to a wireless charging device, characterized in that: The wireless charging device includes a plurality of inverter circuits and a plurality of transmitting coils, wherein the transmitting coil includes a first transmitting coil or a second transmitting coil, the size of the second transmitting coil is larger than the size of the first transmitting coil, and the first transmitting coil and the second transmitting coil are arranged in the same coil layer or in different coil layers; The wireless charging device further includes a plurality of first charging branches and a plurality of second charging branches, wherein the plurality of first charging branches are connected in parallel; an inverter circuit is electrically connected to the plurality of first charging branches, and is used to provide an alternating current to one of the plurality of first charging branches; the remaining inverter circuits are each electrically connected to a corresponding second charging branch, and are used to provide an alternating current to the corresponding second charging branch; or, the wireless charging device further includes a plurality of second charging branches, wherein the plurality of inverter circuits are each electrically connected to a corresponding second charging branch, and are used to provide an alternating current to the corresponding second charging branch; wherein the first charging branch includes a transmitting coil and a switch tube connected in series with the transmitting coil, and the first charging branch is a circuit or an open circuit; the second charging branch includes a transmitting coil, and the second charging branch is a circuit; The method comprises: Based on the power-on of the wireless charging device, obtaining a Q value of the first transmitting coil and a Q value of the second transmitting coil; Based on the difference between the Q values ​​of the first transmitting coil detected twice in succession being greater than or equal to a first difference threshold, determining that a first electronic device is placed on the charging surface corresponding to the first transmitting coil, and controlling the first transmitting coil to charge the first electronic device; Based on the difference between the Q values ​​of the second transmitting coil detected twice in succession being greater than or equal to a second difference threshold, determining that a second electronic device is placed on the charging surface corresponding to the second transmitting coil, and controlling the second transmitting coil to charge the second electronic device; When the first electronic device supports a private protocol and the second electronic device supports the Qi protocol, several power allocation schemes are sent to the first electronic device, and an optimal power allocation scheme is sent to the second electronic device; the power allocation scheme includes the power allocated to the electronic device and the power allocation priority.

2. The wireless charging method according to claim 1, wherein: When the wireless charging device includes the plurality of inverter circuits, the plurality of first charging branches, and the plurality of second charging branches, one of the inverter circuits is electrically connected to the plurality of first charging branches connected in parallel, and the remaining inverter circuits are each electrically connected to a corresponding second charging branch, before obtaining the Q value of the first transmitting coil and the Q value of the second transmitting coil, the method further includes: Outputting a first driving signal in a first time period of each control cycle, wherein the first driving signal is used to control a first switch tube connected in series with the first transmitting coil to turn on and a second switch tube connected in series with the second transmitting coil to turn off, so that the first transmitting coil is powered on and the second transmitting coil is powered off; and A second driving signal is outputted in the second time period of each control cycle, and the second driving signal is used to control the first switch tube to be turned off and the second switch tube to be turned on, so that the first transmitting coil is powered off and the second transmitting coil is powered on.

3. The wireless charging method according to claim 1 or 2, characterized in that: Based on determining that an electronic device is placed on the charging surface of the wireless charging device, the electronic device includes the first electronic device and / or the second electronic device, the method further includes: Performing a private protocol handshake with the electronic device; Based on the success of the handshake, receiving a private protocol data packet from the electronic device, the private protocol data packet including the maximum power supported by the electronic device; Based on the handshake failure, a Qi protocol data packet is received from the electronic device, where the Qi protocol data packet includes a maximum power supported by the electronic device.

4. The wireless charging method according to claim 3, characterized in that: After receiving the private protocol data packet from the first electronic device and the Qi protocol data packet from the second electronic device, the method further includes: generating the plurality of power allocation schemes according to the maximum power supported by the first electronic device and the power, temperature, and charging strategy of the first electronic device; generating the optimal power allocation scheme according to the maximum power supported by the second electronic device and the power, temperature, and charging strategy of the second electronic device; The power allocation priority of the first electronic device is higher than the power allocation priority of the second electronic device.

5. A wireless charging device, characterized in that: The wireless charging device includes a controller, a plurality of inverter circuits and a plurality of transmitting coils, the transmitting coil includes a first transmitting coil or a second transmitting coil, the size of the second transmitting coil is larger than the size of the first transmitting coil, and the first transmitting coil and the second transmitting coil are arranged in the same coil layer or different coil layers; The wireless charging device further includes a plurality of first charging branches and a plurality of second charging branches, wherein the plurality of first charging branches are connected in parallel; an inverter circuit is electrically connected to the plurality of first charging branches, and is used to provide an alternating current to one of the plurality of first charging branches; the remaining inverter circuits are each electrically connected to a corresponding second charging branch, and are used to provide an alternating current to the corresponding second charging branch; or, the wireless charging device further includes a plurality of second charging branches, wherein the plurality of inverter circuits are each electrically connected to a corresponding second charging branch, and are used to provide an alternating current to the corresponding second charging branch; wherein the first charging branch includes a transmitting coil and a switch tube connected in series with the transmitting coil, and the first charging branch is a circuit or an open circuit; the second charging branch includes a transmitting coil, and the second charging branch is a circuit; The controller is used to: Based on the power-on of the wireless charging device, obtaining a Q value of the first transmitting coil and a Q value of the second transmitting coil; Based on the difference between the Q values ​​of the first transmitting coil detected twice in succession being greater than or equal to a first difference threshold, determining that a first electronic device is placed on the charging surface corresponding to the first transmitting coil, and controlling the first transmitting coil to charge the first electronic device; Based on the difference between the Q values ​​of the second transmitting coil detected twice in succession being greater than or equal to a second difference threshold, determining that a second electronic device is placed on the charging surface corresponding to the second transmitting coil, and controlling the second transmitting coil to charge the second electronic device; When the first electronic device supports a private protocol and the second electronic device supports the Qi protocol, several power allocation schemes are sent to the first electronic device, and an optimal power allocation scheme is sent to the second electronic device; the power allocation scheme includes the power allocated to the electronic device and the power allocation priority.

6. The wireless charging device according to claim 5, characterized in that: When the wireless charging device includes the plurality of inverter circuits, the plurality of first charging branches, and the plurality of second charging branches, one of the inverter circuits is electrically connected to the plurality of first charging branches connected in parallel, and the remaining inverter circuits are each electrically connected to the corresponding second charging branch, before obtaining the Q value of the first transmitting coil and the Q value of the second transmitting coil, the controller is further used to: Outputting a first driving signal in a first time period of each control cycle, wherein the first driving signal is used to control a first switch tube connected in series with the first transmitting coil to be turned on and a second switch tube connected in series with the second transmitting coil to be turned off, so that the first transmitting coil is powered on and the second transmitting coil is powered off; as well as, A second driving signal is outputted in the second time period of each control cycle, and the second driving signal is used to control the first switch tube to be turned off and the second switch tube to be turned on, so that the first transmitting coil is powered off and the second transmitting coil is powered on.

7. The wireless charging device according to claim 5 or 6, characterized in that: Based on determining that an electronic device is placed on the charging surface of the wireless charging device, the electronic device includes the first electronic device and / or the second electronic device, the controller is further used to: Performing a private protocol handshake with the electronic device; Based on the success of the handshake, receiving a private protocol data packet from the electronic device, the private protocol data packet including the maximum power supported by the electronic device; Based on the handshake failure, a Qi protocol data packet is received from the electronic device, where the Qi protocol data packet includes a maximum power supported by the electronic device.

8. The wireless charging device according to claim 7, characterized in that: After receiving the private protocol data packet from the first electronic device and the Qi protocol data packet from the second electronic device, the controller is further configured to: generating the plurality of power allocation schemes according to the maximum power supported by the first electronic device and the power, temperature, and charging strategy of the first electronic device; generating the optimal power allocation scheme according to the maximum power supported by the second electronic device and the power, temperature, and charging strategy of the second electronic device; The power allocation priority of the first electronic device is higher than the power allocation priority of the second electronic device.

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