Receiving end coil, wireless charging receiving end equipment and charging position prompting method

Abstract

The invention discloses a receiving end coil, a wireless charging receiving end device and a charging position prompting method, the receiving end coil comprises a main coil and a plurality of secondary coils, and the plurality of secondary coils are distributed on the outer side of the outermost coil of the main coil at intervals; the secondary coil is obtained by winding a part of the outermost coil of the primary coil along the outer side of the primary coil, and the winding direction of the secondary coil is opposite to that of the primary coil; each of the plurality of secondary coils has a different number of turns.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a receiving end coil, a wireless charging receiving end device, a wireless charging position prompting method, an electronic device and a readable storage medium. Background Art

[0002] The principle of wireless charging for mobile phones is electromagnetic induction. Energy is transferred through the coupling of magnetic flux lines by coils. The charging efficiency is related to the area facing the coils, the relative position of the coils and the distance. When the coils are offset, the charging efficiency will decrease.

[0003] In the related art, when the coil is offset, the transmitter will actively reduce the charging power, resulting in lower system efficiency. Since the user cannot perceive the position offset of the coil, the charging experience is poor. Summary of the invention

[0004] The present application provides a receiving end coil, a wireless charging receiving end device, a wireless charging position prompting method, an electronic device and a readable storage medium, so as to determine the offset state of the wireless charging receiving end device during the wireless charging process, prompt the user, and facilitate the user to adjust the position of the wireless charging receiving end device in time to improve the charging efficiency.

[0005] In a first aspect, the present application discloses a receiving end coil, comprising: a main coil and a plurality of secondary coils;

[0006] The plurality of secondary coils are distributed at intervals outside the outermost coil of the primary coil;

[0007] The secondary coil is obtained by winding a part of the outermost coil of the main coil along the outer side of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil; and the plurality of secondary coils each have a different number of turns.

[0008] Optionally, the plurality of secondary coils have the same outer diameter.

[0009] Optionally, the outer diameter of the secondary coil is greater than or equal to one fifteenth of the outer diameter of the primary coil and less than or equal to one tenth of the outer diameter of the primary coil.

[0010] Optionally, the plurality of secondary coils include: a first secondary coil, a second secondary coil and a third secondary coil;

[0011] The first secondary coil and the second secondary coil are respectively located at two ends of the outer diameter of the main coil, and the third secondary coil is at the same distance as the first secondary coil and the second secondary coil.

[0012] Optionally, it also includes: a multi-layer magnetic isolation sheet;

[0013] The multi-layer magnetic isolation sheet includes a magnetic isolation sheet arranged on one side of the receiving end coil and a magnetic isolation sheet arranged in a non-routing area in the middle of the main coil of the receiving end coil.

[0014] In a second aspect, the present application discloses a wireless charging receiving end device, comprising: a receiving end coil, a processing module and a reminder module as described in the first aspect;

[0015] The processing module is connected to the receiving end coil and the reminder module respectively;

[0016] The processing module is used to determine the offset state of the main coil of the receiving end coil relative to the transmitting end coil when the wireless charging receiving end device is placed on the wireless charging transmitting end device, based on the corresponding charging characteristic parameters when the receiving end coil is coupled with the transmitting end coil of the wireless charging transmitting end device for charging, and transmit the offset state to the reminder module for reminder; the charging characteristic parameters are used to characterize the relative position relationship between the main coil of the receiving end coil and the transmitting end coil.

[0017] In a third aspect, the present application discloses a wireless charging position prompting method, which is applied to the wireless charging receiving device as described in the second aspect, and the method includes:

[0018] Acquire a charging characteristic parameter; the charging characteristic parameter is a parameter used to characterize the relative position relationship between the main coil of the receiving end coil and the transmitting end coil of the wireless charging transmitting end device when the wireless charging receiving end device is placed on the wireless charging transmitting end device;

[0019] Inputting the charging characteristic parameters into a preset offset algorithm, and outputting an offset state of the main coil relative to the transmitting end coil;

[0020] The offset state is prompted by a reminder module.

[0021] Optionally, the method further comprises:

[0022] Collecting charging characteristic parameters corresponding to each of the wireless charging receiving end devices in different charging areas within a preset time period; the charging area includes a normal charging area and a charging offset area, and the charging offset area is divided according to the position of the secondary coil;

[0023] The charging characteristic parameter is trained based on a deep learning model to determine a weight factor of the charging characteristic parameter; the weight factor is such that after the charging characteristic parameter is input into the offset algorithm, the value of the charging area corresponding to the charging characteristic parameter is output.

[0024] Optionally, inputting the charging characteristic parameter into a preset offset algorithm to output an offset state of the main coil relative to the transmitting end coil includes:

[0025] Input the charging characteristic parameter into a preset offset algorithm, perform weighted calculation on the charging characteristic parameter through the weight factor, and output the charging area where the wireless charging receiving device is located;

[0026] An offset state of the main coil relative to the transmitting-end coil is determined according to the charging area.

[0027] Optionally, the offset state includes an offset direction and an offset adjustment method, and the prompting of the offset state by a reminder module includes:

[0028] The offset direction and the offset adjustment method are displayed in a designated area of ​​the reminder module according to the offset state; the offset direction and the offset adjustment method are prompted in the form of text or graphics.

[0029] In a fourth aspect, the present application discloses an electronic device, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the third aspect are implemented.

[0030] In a fifth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the third aspect are implemented.

[0031] In a sixth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the third aspect.

[0032] In a seventh aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the method described in the third aspect.

[0033] In an embodiment of the present application, a receiving coil is disclosed, comprising: a main coil and a plurality of secondary coils, wherein the plurality of secondary coils are spaced apart on the outside of the outermost coil of the main coil; the secondary coil is obtained by winding a part of the outermost coil of the main coil along the outside of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil; and the plurality of secondary coils each have a different number of turns. In the present application, the secondary coil is extended from the outermost coil of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil, so that the current direction in the secondary coil is opposite to that of the main coil. Since each secondary coil has a different number of winding turns, the inductance generated by the secondary coil is different, and the secondary coils are spaced apart on the outside of the main coil. When the receiving coil is applied to a wireless charging receiving device, if the wireless charging receiving device is offset in different directions, the inductance generated between different secondary coils and the transmitting device is different, resulting in different effects of the secondary coils in different directions on the coupling value between the receiving coil and the transmitting coil. Based on this, the offset direction of the wireless charging receiving device can be determined, which is convenient for users to adjust the position of the wireless charging receiving device in time and improve the wireless charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A wireless charging receiving device provided in an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a receiving end coil provided in an embodiment of the present application;

[0036] Figure 3 This is the first secondary coil winding method provided in the embodiment of the present application;

[0037] Figure 4 This is the second secondary coil winding method provided in the embodiment of the present application;

[0038] Figure 5 This is the third secondary coil winding method provided in the embodiment of the present application;

[0039] Figure 6 This is a schematic diagram of wireless charging provided by an embodiment of the present application;

[0040] Figure 7 This is a schematic diagram of communication between a transmitter and a receiver during a charging process provided by an embodiment of the present application;

[0041] Figure 8 The embodiment of the present application provides a relationship between the coupling value between the secondary coil and the receiving end coil and the displacement;

[0042] Fig. 9 is a relationship between transmission efficiency and displacement of the secondary coil provided in an embodiment of the present application;

[0043] Fig.10 It is a schematic diagram of a stacking method of a multi-layer magnetic isolation sheet provided in an embodiment of the present application;

[0044] Fig.11 This is a schematic diagram of another stacking method of multi-layer magnetic isolation sheets provided in an embodiment of the present application;

[0045] Fig.12 It is a flowchart of the steps of a wireless charging position prompting method provided by an embodiment of the present application;

[0046] Fig.13 It is a charging area division diagram provided in an embodiment of the present application;

[0047] Fig.14 is a schematic diagram of charging characteristic parameter training provided by an embodiment of the present application;

[0048] Fig.15 is a flow chart of an algorithm for obtaining an offset provided in an embodiment of the present application;

[0049] Fig.16 It is a schematic diagram of a reminder module displaying an offset state provided by an embodiment of the present application;

[0050] Fig.17 is a schematic diagram showing another reminder module display offset state provided by an embodiment of the present application;

[0051] Fig.18 is a block diagram of an electronic device 400 provided in an embodiment of the present application;

[0052] Fig.19 It is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.

[0053] Reference numerals:

[0054] 11-secondary coil, 10-primary coil, 20-transmitter coil; 31-third layer of nanocrystals; 32-first and second layers of nanocrystals. DETAILED DESCRIPTION

[0055] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0056] refer to Figure 1 , Figure 1A wireless charging receiving device is shown, comprising: a receiving coil, a processing module and a reminder module; the processing module is connected to the receiving coil and the reminder module respectively; the processing module is used to determine the offset state of the main coil of the receiving coil relative to the transmitting coil when the wireless charging receiving device is placed on the wireless charging transmitting device, according to the corresponding charging characteristic parameters when the receiving coil is coupled with the transmitting coil of the wireless charging transmitting device for charging, and transmit the offset state to the reminder module for reminder; the charging characteristic parameters are used to characterize the relative position relationship between the main coil of the receiving coil and the transmitting coil.

[0057] In an embodiment of the present invention, the receiving coil is used to induction with the transmitting coil of the wireless charging transmitting device to realize wireless charging. The process of wireless charging includes: the wireless charging transmitting device converts electric energy into high-frequency alternating current, and then converts the alternating current into electromagnetic waves through the transmitting coil, and transmits the electric energy to the wireless charging receiving end through electromagnetic induction, magnetic resonance, radio waves, electric field coupling, etc.; the wireless charging receiving end converts the electric energy transmitted by the wireless charging transmitting device into high-frequency alternating current through the receiving coil, and then converts the alternating current into direct current to charge the battery.

[0058] When the receiving coil is facing the transmitting coil, the charging efficiency reaches the highest. When there is an offset between the receiving coil and the transmitting coil, the charging efficiency decreases. In the present application, the main coil of the receiving coil is the coil with the highest charging efficiency when facing the transmitting coil. The relative position relationship between the main coil of the receiving coil and the transmitting coil can be characterized by charging characteristic parameters. The processing module can determine the offset state of the main coil of the receiving coil relative to the transmitting coil according to the corresponding charging characteristic parameters when the receiving coil is coupled with the transmitting coil of the wireless charging transmitting device, and transmit the offset state to the reminder module, which reminds the offset state.

[0059] The processing module in the present application is connected to the receiving coil and the reminder module respectively, and is used to determine the offset state of the main coil relative to the transmitting coil according to the corresponding charging characteristic parameters when the receiving coil is coupled with the transmitting coil of the wireless charging transmitting device when the wireless charging receiving device is placed on the wireless charging transmitting device, and transmit the offset state to the reminder module for reminder. The reminder module can prompt the current offset direction and adjustment method based on the offset state, such as text prompts or graphic prompts, etc., which are not limited in the embodiments of the present application.

[0060] In order to promptly notify the user to adjust the position of the wireless charging receiving device when there is an offset between the receiving coil and the transmitting coil to ensure the efficiency of wireless charging, the present application discloses a method of identifying the offset state of the wireless charging receiving device by setting a secondary coil. The details are as follows.

[0061] refer to Figure 2 , Figure 2 A schematic diagram of a receiving end coil is shown, comprising a main coil and multiple secondary coils; the multiple secondary coils are distributed at intervals on the outside of the outermost coil of the main coil; the secondary coil is obtained by winding a part of the outermost coil of the main coil along the outside of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil; the multiple secondary coils each have a different number of turns.

[0062] In the embodiment of the present invention, reference Figure 2 The receiving end coil includes a main coil and three secondary coils arranged outside the main coil. The secondary coils 1, 2 and 3 are arranged at intervals and each has a different number of winding turns. Figures 3 to 5 , Figures 3 to 5 The winding method of the secondary coil 1, secondary coil 2, and secondary coil 3 is shown by winding a part of the outermost coil of the main coil along the outer side of the main coil. When the main coil is offset relative to the transmitter coil, the secondary coil enters the range of the transmitter coil. Since the number of turns of each secondary coil is different, the inductance generated when different secondary coils enter the range of the transmitter coil is different. The inductance is a physical quantity that characterizes the degree of mutual inductance between the secondary coil and the transmitter coil. For example, if the main coil is offset to the left relative to the transmitter coil, then the secondary coil 1 enters the range of the transmitter coil, refer to Figure 3 , due to the current direction of the secondary coil 1 ( Figure 3 The arrow in the figure is opposite to the main coil, so the direction of the electromagnetic field between the secondary coil 1 and the transmitting coil is opposite to the direction of the electromagnetic field between the main coil and the transmitting coil, so that the energy of the electromagnetic field between the main coil and the transmitting coil actually used for charging is partially offset by the energy of the electromagnetic field between the secondary coil 1 and the transmitting coil. If the main coil is offset to the right relative to the transmitting coil, the offset distance is the same as when it is offset to the left. At this time, the secondary coil 2 enters the range of the transmitting coil, and the energy of the electromagnetic field between the main coil and the transmitting coil is partially offset by the energy of the electromagnetic field between the secondary coil 2 and the transmitting coil. Since the number of turns of the secondary coil 2 and the secondary coil 1 is different, the energy that can be offset is also different, that is, different secondary coils have different effects on the charging effect between the main coil and the transmitting coil. Therefore, after setting secondary coils with different numbers of turns, based on the corresponding charging characteristic parameters when the receiving coil is coupled with the transmitting coil of the wireless charging transmitting device for charging, the offset state of the main coil relative to the transmitting coil can be determined.

[0063] Furthermore, the charging characteristic parameter may be a parameter reflecting the current charging state. Since the current direction of the secondary coil is opposite to that of the main coil, and the inductances generated between the secondary coil 1, the secondary coil 2, and the secondary coil 3 and the transmitting coil are different, when the receiving coil is offset in different directions, the degree of mutation of the charging characteristic parameter is different. For example, when the same distance is offset to the left and to the right, the impact on the charging characteristic parameter is different, resulting in different changes in the coupling value between the receiving coil and the transmitting coil. The change in the coupling value can be reflected in the charging characteristic parameter. Therefore, the offset state of the receiving coil can be determined based on the charging characteristic parameter. Specifically, the charging characteristic parameters may include: the quality factor between the transmitting end and the receiving end, the power loss in transmission, the charging frequency, the transmitting seat power, the receiving end output power, the battery temperature, the number of demodulation channels, the error control parameter, the signal strength, etc. Refer to Table 1, which shows a schematic diagram for charging characteristic parameters. When the receiving end coil is offset, the charging characteristic parameters will change. For example, for the quality factor, during normal charging, the corresponding value is 120. When the receiving end coil is offset, the value of the quality factor can change from 120 to 150. Different secondary coils have different degrees of influence on the charging characteristic parameters. Therefore, based on the acquired charging characteristic parameters, the offset state of the receiving end coil relative to the transmitting end coil can be determined.

[0064] Table 1

[0065]

[0066] Specifically, refer to Figure 6 , Figure 6 A wireless charging schematic diagram is shown, referring to Figure 7 , Figure 7A communication diagram between a transmitter and a receiver during a charging process is shown. When the receiver is placed on the charging seat of the transmitter, the receiver will send a signal strength packet (SS packet), a control error packet, a receiving power packet, etc. When the transmitter receives the charging information and charging requirements. The transmitter will first detect the coupling system quality factor (Q value), actively adjust the charging power and charging frequency, and the transmitter will transmit the transmitter charging data to the receiver. When the charging device shifts to the left, the secondary coil 1 of the receiver invades the transmitter coil area. Since the current direction of the secondary coil is opposite to that of the main coil, the coupling value between the transmitter and the receiver coil will decrease, resulting in a sudden change in some charging characteristic parameters. The mutual inductance between the receiver coil and the transmitter coil can be understood as the sum of the single-turn coupling values ​​of the receiver coil and the transmitter coil, for example, by accumulating the coupling values ​​between each coil of the transmitter coil and each coil of the receiver coil. Since the current direction of the secondary coil is opposite to that of the main coil, and the secondary coil 1, secondary coil 2, and secondary coil 3 have different inductances, the coils shift in different directions, resulting in different degrees of sudden changes in the charging characteristic parameters. The coupling values ​​between the receiving coil and the transmitting coil vary with the horizontal displacement directions of the three secondary coils, such as Figure 8 As shown, Figure 8 The relationship between the coupling value between the secondary coil and the receiving end coil and the displacement is shown, where M1 can correspond to the secondary coil 2, M2 can correspond to the secondary coil 1, and M3 can correspond to the secondary coil 3. The characteristic values ​​of the coupling curves are different. Fig. 9 The relationship between the transmission efficiency and the displacement of the secondary coil is shown. It can be seen that in different offset directions, different secondary coils have different effects on the coupling value and the transmission efficiency. The change in the coupling value will be reflected in its charging characteristic parameters during the wireless charging function. Therefore, the offset position of the coil can be determined based on this, that is, the charging characteristic parameters can actually reflect the relative position relationship between the secondary coil and the transmitting end coil.

[0067] Optionally, the plurality of secondary coils have the same outer diameter.

[0068] In an embodiment of the present invention, the plurality of secondary coils have the same outer diameter to reasonably arrange the occupied space of the receiving end coil, and if the outer diameters are the same, when the offset directions of the receiving end coils are different but the offset distances are the same, the inductances between the secondary coils arranged at different positions and the transmitting end coils are different, thereby realizing a benchmark identification of the offset state.

[0069] Optionally, the outer diameter of the secondary coil is greater than or equal to one fifteenth of the outer diameter of the primary coil and less than or equal to one tenth of the outer diameter of the primary coil.

[0070] In an embodiment of the present invention, an outer diameter of the secondary coil is greater than or equal to one fifteenth of an outer diameter of the main coil and less than or equal to one tenth of an outer diameter of the main coil. For example, the outer diameter of the secondary coil may be one tenth, one eleventh, one twelfth, one thirteenth, one fourteenth, one fifteenth, etc. of the outer diameter of the main coil, so as to avoid the situation where the outer diameter of the secondary coil is too small, which has a small impact on the coupling value between the main coil and the transmitting end coil, and it is difficult to distinguish the offset state based on the position of the secondary coil; and when the outer diameter of the secondary coil is too large, which has a large impact on the coupling value between the main coil and the transmitting end coil, affecting the charging efficiency between the receiving end coil and the transmitting end coil.

[0071] Optionally, the plurality of secondary coils include: a first secondary coil, a second secondary coil and a third secondary coil;

[0072] The first secondary coil and the second secondary coil are respectively located at two ends of the outer diameter of the main coil, and the third secondary coil is at the same distance as the first secondary coil and the second secondary coil.

[0073] In the embodiment of the present invention, reference Figure 1 , the secondary coil includes: the first secondary coil (for Figure 1 Secondary coil 1), second secondary coil (for Figure 1 Secondary coil 2) and the third secondary coil (for Figure 1 The first secondary coil and the second secondary coil are respectively located at the two ends of the outer diameter of the main coil, and the third secondary coil is respectively the same distance as the first secondary coil and the second secondary coil. At this time, the offset direction can be divided into up, down, left, and right. When the receiving end coil offsets in different directions, the secondary coils corresponding to different offset directions have different effects on the charging characteristic parameters. Therefore, based on the charging characteristic parameters, the offset state of the receiving end coil relative to the transmitting end coil can be judged.

[0074] In addition, the number of secondary coils and the spacing between the secondary coils can be selected based on actual conditions. Preferably, the number of secondary coils can be less than or equal to 5 to avoid interference with charging caused by too many secondary coils. This embodiment of the present application is not limited here.

[0075] Optionally, it also includes: a multi-layer magnetic isolation sheet;

[0076] The multi-layer magnetic isolation sheet includes a magnetic isolation sheet arranged on one side of the receiving end coil and a magnetic isolation sheet arranged in a non-routing area in the middle of the main coil of the receiving end coil.

[0077] In the embodiments of the present invention, in the wireless charging scenario, the main functions of the magnetic isolation sheet include magnetic conduction and magnetic shielding. When the wireless charging transmitter coil is working, a magnetic field with constantly changing strength is generated. The existence of the magnetic isolation sheet can help guide this magnetic field so that its energy acts on the wireless charging receiver as much as possible, thereby improving the energy conversion efficiency. The magnetic isolation sheet also plays the role of magnetic shielding, which can prevent the changing magnetic field from generating unnecessary current when encountering conductors such as metal, causing heat and damage to electronic equipment. The magnetic isolation sheet can be made of materials such as nanocrystals and ferrites. Reference Fig.10 , Fig.10 A schematic diagram of a stacking method of multi-layer magnetic isolation sheets is shown. Fig.11 A schematic diagram of another stacking method of multi-layer magnetic isolation sheets is shown. For example, a 50W wireless charging receiving coil module usually uses 3 layers of nanocrystals for magnetic field shielding. In the magnetic field intensity distribution of the receiving end, the magnetic field intensity in the non-routing area in the middle of the coil is much higher than that in the coil area. Therefore, the stacking of magnetic isolation sheets can be optimized based on this. For example, for a 50W wireless charging receiving coil module, the original three layers of nanocrystals in the receiving coil can be reduced to two layers of nanocrystals, and then a layer of nanocrystals is compensated in the non-routing area in the middle of the coil. At this time, the magnetic isolation sheet can not only play the role of electromagnetic shielding but also meet the performance of magnetic conductivity. In this way, the thickness of the coil stack can be further reduced while ensuring the charging effect, and the spatial layout of the electronic equipment can be optimized. The stacking method of magnetic isolation sheets can be applied to 50W wireless charging scenarios, and can also be applied to 30W, 60W and other charging scenarios. By adding magnetic isolation sheets in the non-routing area in the middle of the main coil of the receiving coil, the magnetic conductivity can be improved.

[0078] In summary, in an embodiment of the present application, a receiving coil is disclosed, comprising: a main coil and a plurality of secondary coils, wherein the plurality of secondary coils are spaced apart on the outside of the outermost coil of the main coil; the secondary coil is obtained by winding a part of the outermost coil of the main coil along the outside of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil; and the plurality of secondary coils each have a different number of turns. In the present application, the secondary coil is extended from the outermost coil of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil, so that the current direction in the secondary coil is opposite to that of the main coil. Since each secondary coil has a different number of winding turns, the inductance generated by the secondary coil is different, and the secondary coils are spaced apart on the outside of the main coil. When the receiving coil is applied to a wireless charging receiving device, if the wireless charging receiving device is offset in different directions, the inductance generated between different secondary coils and the transmitting device is different, resulting in different effects of the secondary coils in different directions on the coupling value between the receiving coil and the transmitting coil. Based on this, the offset direction of the wireless charging receiving device can be determined, which is convenient for users to adjust the position of the wireless charging receiving device in time and improve the wireless charging efficiency.

[0079] Second, refer to Fig.12 The embodiment of the present application provides a wireless charging position prompting method, which is applied to the above-mentioned wireless charging receiving device, and the method includes:

[0080] Step 101, obtaining a charging characteristic parameter; the charging characteristic parameter is a parameter used to characterize the relative position relationship between the main coil of the receiving coil and the transmitting coil of the wireless charging transmitting device when the wireless charging receiving device is placed on the wireless charging transmitting device;

[0081] Step 102, inputting the charging characteristic parameter into a preset offset algorithm, and outputting an offset state of the main coil relative to the transmitting end coil;

[0082] Step 103: Prompt the offset state through a prompt module.

[0083] In the embodiment of the present invention, for steps 101 to 103, the charging characteristic parameters can reflect the performance of wireless charging, and the charging characteristic parameters are affected by the secondary coil within the range of the transmitting coil. Therefore, the charging characteristic parameters can characterize the relative position relationship between the secondary coil and the transmitting coil. After the wireless charging receiving device is placed on the wireless charging base, the wireless charging transmitting end will transmit the charging characteristic parameters to the wireless charging receiving device. The charging characteristic parameters include the parameters transmitted by the wireless charging transmitting device and the parameters of the wireless charging receiving device itself related to wireless charging.

[0084] The processing module can input the acquired wireless charging characteristic parameters into a preset offset algorithm. The offset algorithm can output information such as whether the receiving end coil is offset and the direction of the offset based on the input charging characteristic parameters. The reminder module can remind the offset status based on the output result of the processing module to facilitate the user to adjust the wireless charging receiving end device in time.

[0085] Optionally, the method further comprises:

[0086] Step 104, collecting charging characteristic parameters corresponding to each of the wireless charging receiving end devices in different charging areas within a preset time period; the charging area includes a normal charging area and a charging offset area, and the charging offset area is divided according to the position of the secondary coil;

[0087] Step 105, training the charging characteristic parameters based on a deep learning model to determine weight factors of the charging characteristic parameters; the weight factors are such that after the charging characteristic parameters are input into the offset algorithm, the value of the charging area corresponding to the charging characteristic parameters is output.

[0088] In the embodiment of the present invention, for step 104 to step 105, refer to Fig.13 , Fig.13A charging area division diagram is shown, wherein charging area 0 is a normal charging area, the circle outside charging area 0 represents the coverage range of the transmitting end coil, and charging areas 1, 2, 3, and 4 represent four charging offset areas, respectively, wherein charging offset area 1 represents an upward offset, charging offset area 2 represents a downward offset, charging offset area 3 represents a left offset, and charging offset area 4 represents a right offset.

[0089] The weight factors of each parameter in the offset algorithm fOffset (Qm, Powerloss, f, Pa, Prx, Tbat, Ch, Ce, SS) are [AB CDEFGHI] respectively. The charging characteristic parameters of each charging area for a preset time period, such as the first minute of charging, are collected, and the weight factors are iterated through the deep learning model algorithm until the output of the offset equation fOffset (Qm, Powerloss, f, Pa, Prx, Tbat, Ch, Ce, SS) is ensured to be consistent with its location area number. For example, the charging characteristic parameters collected in any offset charging area "1" are brought into the fOffset algorithm to ensure that its output converges to 1. The weight factors of each charging characteristic parameter in the offset algorithm f can be obtained through continuous iteration, so that after the charging characteristic parameters are input into the offset algorithm, the value of the charging area corresponding to the charging characteristic parameters is output. Refer to Table 2, which shows a charging characteristic parameter data set. Among them, index represents the charging area, time is the time when data is collected, x, y, and z represent the collected location, and the weight factors of each charging characteristic parameter in the offset algorithm can be obtained through iterative learning of the charging characteristic parameters of each charging area, so that the offset algorithm can determine the current charging area based on the real-time charging characteristic parameters, thereby determining the offset state of the receiving end coil relative to the transmitting end coil to prompt the user.

[0090] Table 2

[0091]

[0092] Optionally, step 102 includes:

[0093] Sub-step 1021, inputting the charging characteristic parameter into a preset offset algorithm, weighting the charging characteristic parameter by the weight factor, and outputting the charging area where the wireless charging receiving end device is located;

[0094] Sub-step 1022: determining an offset state of the main coil relative to the transmitting end coil according to the charging area.

[0095] In the embodiment of the present invention, reference Fig.14 , Fig.14A schematic diagram of charging characteristic parameter training is shown, and the collected charging characteristic parameter big data is subjected to deep learning of logistic regression, and the weight factor is continuously iterated through output. The weight factor matrix of each charging characteristic parameter in the algorithm is all solidified as a parameter in the wireless charging receiving device. In actual use, the terminal reads the wireless charging characteristic parameters of the current charging state in real time. The solidified algorithm can perform weighted calculations based on the charging characteristic parameters, and classify the calculation results by region to determine whether there is an offset and the direction of the offset. For example, if the charging characteristic parameters are input and 1 is output, it indicates that the charging area is offset charging area 1, indicating that the current charging position is biased. When the algorithm model learns a certain amount of data, it can accurately determine whether the coil is offset and the direction of the offset.

[0096] refer to Fig.15 , Fig.15 A flowchart of an algorithm for obtaining an offset is shown, comprising:

[0097] S1, divide the charging area. The non-offset area is named 0, and the upper, lower, left and right offsets are 1, 2, 3, and 4 respectively;

[0098] S2, establish the offset algorithm foffset(Qm,Powerloss,f,Pa,Prx,Tbat,Ch,Ce,SS) and preset the weight factor of each charging characteristic parameter: [ABCDEFGHI];

[0099] S3, collect learning data sets. Randomly collect charging characteristic parameters in the stable state in five charging areas 0, 1, 2, 3, and 4;

[0100] S4, feature parameter is brought into f offset, if the output is consistent with the location area number, then go to step S6, if not, then go to step S5

[0101] S5, adjust the weight factor [ABCDEFGHI] according to the region naming value so that the output of the migration algorithm is correct;

[0102] S6, all weight factor matrices of each charging parameter in the algorithm are solidified as parameters in the mobile terminal, and the algorithm is written into the terminal;

[0103] S7, when the mobile terminal uses the wireless charging function, the charging characteristic parameters are retrieved and brought into the offset algorithm;

[0104] S8: Based on the output of the offset equation, the UI prompts whether the wireless charger is offset and the offset direction.

[0105] Optionally, the offset state includes an offset direction and an offset adjustment method, and step 103 includes:

[0106] Sub-step 1031: displaying the offset direction and the offset adjustment method in a designated area of ​​the reminder module according to the offset state; the offset direction and the offset adjustment method are prompted in the form of text or graphics.

[0107] In the embodiment of the present invention, after the processing module determines the offset state based on the offset algorithm, the offset state can be transmitted to the reminder module for display. The reminder module can include a display panel. Fig.16 , Fig.16 A schematic diagram showing a reminder module displaying an offset state is shown. Fig.17 A schematic diagram of another reminder module displaying the offset state is shown. Through the reminder module, the user can quickly know whether the current charging position is appropriate, so that the charging position can be adjusted timely and accurately based on the prompt information to improve the charging efficiency. The reminder method can also be a voice reminder, an indicator light reminder, etc., which is not limited in the embodiment of the present application.

[0108] In addition, when there are foreign objects such as metal between the receiving coil and the transmitting coil, the method of this application can also be used for detection and prompting. There are a large number of third-party wireless charging transmitters on the market, but they are not equipped with foreign object detection functions. At the same time, there are metal media on the back of many mobile phone cases, such as metal brackets and metal accessories. When the transmitting coil and the receiving coil in the mobile phone are coupled and energy transmission begins, there is a high-intensity alternating magnetic field between the transmitting end and the receiving end, which will generate Early current on the metal surface between the media, rapidly heating up, and posing a safety hazard. Similarly, using the method of this application, when a metal foreign object invades the charging area, a corresponding charging characteristic parameter will also be generated. By learning the charging characteristic parameters when there is a metal foreign object, a weight factor reflecting whether there is a foreign object can also be obtained, so that when the charging characteristic parameters are input into the offset algorithm, the judgment result of whether there is a metal foreign object can be output to achieve the detection of metal foreign objects.

[0109] In summary, in an embodiment of the present application, a wireless charging receiving device is disclosed, including: a receiving coil, a processing module and a reminder module; the processing module is respectively connected to the receiving coil and the reminder module, and is used to determine the offset state of the main coil relative to the transmitting coil when the wireless charging receiving device is placed on the wireless charging transmitting device, according to the corresponding charging characteristic parameters when the receiving coil is coupled with the transmitting coil of the wireless charging transmitting device, and transmit the offset state to the reminder module for reminder; the charging characteristic parameters are used to characterize the relative position relationship between the main coil and the transmitting coil. In the present application, the secondary coil is extended from the outermost coil of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil, so that the current direction in the secondary coil is opposite to that of the main coil. Since each secondary coil has a different number of winding turns, the inductance generated by the secondary coil is different, and the secondary coils are distributed on the outside of the main coil at intervals. When the wireless charging receiving device is offset in different directions, the secondary coils in different directions have different effects on the coupling value between the receiving coil and the transmitting coil, and the coupling value is related to the charging characteristic parameters, so that by collecting the charging characteristic parameters, the offset state of the wireless charging receiving device can be determined, and the offset state is displayed in the reminder module, which is convenient for the user to adjust the position of the wireless charging receiving device in time and improve the wireless charging efficiency.

[0110] The device for executing the wireless charging position prompting method in the embodiment of the present application may be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be a device other than a terminal. Exemplarily, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc. It may also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0111] The device for executing the wireless charging position prompting method of the electronic device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0112] The electronic device provided in the embodiment of the present application can achieve Fig.12 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0113] Alternatively, if Fig.18 As shown, an embodiment of the present application also provides an electronic device 400, including a processor 401 and a memory 402, wherein the memory 402 stores programs or instructions that can be executed on the processor 401, and when the program or instructions are executed by the processor 401, the various steps of the above-mentioned method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0114] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0115] Fig.19 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0116] The electronic device 1000 includes but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010 and other components.

[0117] Those skilled in the art will appreciate that the electronic device 1000 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1010 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.19 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0118] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processor (Graphics Processing Unit, GPU) 10041 and a microphone 10042, and the graphics processor 10041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0119] The memory 1009 can be used to store software programs and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1009 may include a volatile memory or a non-volatile memory, or the memory 1009 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0120] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1010.

[0121] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0122] The processor 1010 is used to: obtain a charging characteristic parameter; the charging characteristic parameter is a parameter used to characterize the relative position relationship between the main coil of the receiving end coil and the transmitting end coil of the wireless charging transmitting end device when the wireless charging receiving end device is placed on the wireless charging transmitting end device;

[0123] Inputting the charging characteristic parameters into a preset offset algorithm, and outputting an offset state of the main coil relative to the transmitting end coil;

[0124] The offset state is prompted by a reminder module.

[0125] The processor 1010 is further configured to: collect charging characteristic parameters corresponding to each of the wireless charging receiving end devices in different charging areas within a preset time period; the charging area includes a normal charging area and a charging offset area, and the charging offset area is divided according to the position of the secondary coil;

[0126] The charging characteristic parameter is trained based on a deep learning model to determine a weight factor of the charging characteristic parameter; the weight factor is such that after the charging characteristic parameter is input into the offset algorithm, the value of the charging area corresponding to the charging characteristic parameter is output.

[0127] The processor 1010 is further configured to: input the charging characteristic parameter into a preset offset algorithm, perform weighted calculation on the charging characteristic parameter through the weight factor, and output the charging area where the wireless charging receiving device is located;

[0128] An offset state of the main coil relative to the transmitting-end coil is determined according to the charging area.

[0129] The processor 1010 is further configured to: display the offset direction and the offset adjustment method in a designated area of ​​the reminder module according to the offset state; and prompt the offset direction and the offset adjustment method in the form of text or graphics.

[0130] In summary, in an embodiment of the present application, a receiving coil is disclosed, including a main coil and a plurality of secondary coils, wherein the plurality of secondary coils are spaced apart on the outside of the outermost coil of the main coil; the secondary coil is obtained by winding a part of the outermost coil of the main coil along the outside of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil; and the plurality of secondary coils each have a different number of turns. In the present application, the secondary coil is extended from the outermost coil of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil, so that the current direction in the secondary coil is opposite to that of the main coil. Since each secondary coil has a different number of winding turns, the inductance generated by the secondary coil is different, and the secondary coils are spaced apart on the outside of the main coil. When the receiving coil is applied to a wireless charging receiving device, if the wireless charging receiving device is offset in different directions, the inductance generated between different secondary coils and the transmitting device is different, resulting in different effects of the secondary coils in different directions on the coupling value between the receiving coil and the transmitting coil. Based on this, the offset direction of the wireless charging receiving device can be determined, which is convenient for users to adjust the position of the wireless charging receiving device in time and improve the wireless charging efficiency.

[0131] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0132] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0133] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0134] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0135] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0136] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0137] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A receiving end coil, characterized in that: include: A main coil and a plurality of secondary coils; The plurality of secondary coils are distributed at intervals outside the outermost coil of the primary coil; The secondary coil is obtained by winding a part of the outermost coil of the main coil along the outer side of the main coil, and the winding direction of the secondary coil is opposite to that of the main coil; and the plurality of secondary coils each have a different number of turns.

2. The receiving end coil according to claim 1, characterized in that: The plurality of secondary coils have the same outer diameter.

3. The receiving end coil according to claim 2, characterized in that: The outer diameter of the secondary coil is greater than or equal to one fifteenth of the outer diameter of the primary coil and less than or equal to one tenth of the outer diameter of the primary coil.

4. The receiving end coil according to claim 1, characterized in that: The plurality of secondary coils include: a first secondary coil, a second secondary coil and a third secondary coil; The first secondary coil and the second secondary coil are respectively located at two ends of the outer diameter of the main coil, and the third secondary coil is at the same distance as the first secondary coil and the second secondary coil.

5. The receiving end coil according to claim 1, characterized in that: Also includes: Multi-layer magnetic isolation sheet; The multi-layer magnetic isolation sheet includes a magnetic isolation sheet arranged on one side of the receiving end coil and a magnetic isolation sheet arranged in a non-routing area in the middle of the main coil of the receiving end coil.

6. A wireless charging receiving device, characterized in that: include: The receiving end coil, processing module and reminder module as described in any one of claims 1 to 5; The processing module is connected to the receiving end coil and the reminder module respectively; The processing module is used to determine the offset state of the main coil of the receiving end coil relative to the transmitting end coil when the wireless charging receiving end device is placed on the wireless charging transmitting end device, based on the corresponding charging characteristic parameters when the receiving end coil is coupled with the transmitting end coil of the wireless charging transmitting end device for charging, and transmit the offset state to the reminder module for reminder; the charging characteristic parameters are used to characterize the relative position relationship between the main coil of the receiving end coil and the transmitting end coil.

7. A wireless charging position prompting method, characterized in that: Applied to the wireless charging receiving device as claimed in claim 6, characterized in that the method comprises: Acquire a charging characteristic parameter; the charging characteristic parameter is a parameter used to characterize the relative position relationship between the main coil of the receiving end coil and the transmitting end coil of the wireless charging transmitting end device when the wireless charging receiving end device is placed on the wireless charging transmitting end device; Inputting the charging characteristic parameters into a preset offset algorithm, and outputting an offset state of the main coil relative to the transmitting end coil; The offset state is prompted by a reminder module.

8. The method according to claim 7, characterized in that The method further comprises: Collecting charging characteristic parameters corresponding to each of the wireless charging receiving end devices in different charging areas within a preset time period; the charging area includes a normal charging area and a charging offset area, and the charging offset area is divided according to the position of the secondary coil; The charging characteristic parameter is trained based on a deep learning model to determine a weight factor of the charging characteristic parameter; the weight factor is such that after the charging characteristic parameter is input into the offset algorithm, the value of the charging area corresponding to the charging characteristic parameter is output.

9. The method according to claim 8, characterized in that The step of inputting the charging characteristic parameter into a preset offset algorithm and outputting an offset state of the main coil relative to the transmitting end coil includes: Input the charging characteristic parameter into a preset offset algorithm, perform weighted calculation on the charging characteristic parameter through the weight factor, and output the charging area where the wireless charging receiving device is located; An offset state of the main coil relative to the transmitting-end coil is determined according to the charging area.

10. The method according to claim 7, characterized in that The offset state includes an offset direction and an offset adjustment method, and the prompting module prompts the offset state, including: The offset direction and the offset adjustment method are displayed in a designated area of ​​the reminder module according to the offset state; the offset direction and the offset adjustment method are prompted in the form of text or graphics.

11. An electronic device comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the method according to claims 7 to 10 is implemented.

12. A readable storage medium storing a program or an instruction, wherein the program or the instruction is executed by a processor to implement the method according to claims 7 to 10.

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