Wireless charging method and wireless charging device

Abstract

The invention provides a wireless charging method and wireless charging equipment, and relates to the technical field of wireless charging. According to the specific implementation scheme, the method comprises the following steps: in response to detection of existence of a target wireless receiving coil, acquiring relative position information of the target wireless receiving coil relative to a first wireless transmitting coil and a second wireless transmitting coil; if the relative position information meets a first condition, based on the relative position information, controlling a first wireless transmitting coil to radiate a first electromagnetic wave signal with a first radiation parameter, and controlling a second wireless transmitting coil to radiate a second electromagnetic wave signal with a second radiation parameter; wherein a first electromagnetic wave signal radiated by the first radiation parameter is matched with a second electromagnetic wave signal radiated by the second radiation parameter to form a target magnetic field which generates magnetic flux change in a target direction; the target magnetic field is used for enabling the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electric energy.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wireless charging, and more specifically, the present disclosure provides a wireless charging method and a wireless charging device. Background Art

[0002] At present, some electronic devices basically have the function of wireless charging. However, due to improper placement of electronic devices and other reasons, low charging efficiency may occur. Summary of the invention

[0003] The present disclosure provides a wireless charging method and a wireless charging device.

[0004] According to one aspect of the present disclosure, a wireless charging method is provided, including: in response to detecting the presence of a target wireless receiving coil, obtaining relative position information of the target wireless receiving coil relative to a first wireless transmitting coil and a second wireless transmitting coil; if the relative position information satisfies a first condition, based on the relative position information, controlling the first wireless transmitting coil to radiate a first electromagnetic wave signal with a first radiation parameter, and controlling the second wireless transmitting coil to radiate a second electromagnetic wave signal with a second radiation parameter; wherein the first electromagnetic wave signal radiated with the first radiation parameter and the second electromagnetic wave signal radiated with the second radiation parameter cooperate to form a target magnetic field that produces a change in magnetic flux in a target direction; the target magnetic field is used to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy.

[0005] According to another embodiment of the present disclosure, if the relative position information is a first relative position, the first radiation parameter is a first sub-radiation parameter, and the second radiation parameter is a second sub-radiation parameter; if the relative position information is a second relative position, the first radiation parameter is a third sub-radiation parameter, and the second radiation parameter is a fourth sub-radiation parameter; the first sub-radiation parameter is different from the third sub-radiation parameter, and / or the second sub-radiation parameter is different from the fourth sub-radiation parameter.

[0006] According to another embodiment of the present disclosure, the phase characterized by the first radiation parameter is different from the phase characterized by the second radiation parameter; and / or the current value characterized by the first radiation parameter is different from the current value characterized by the second radiation parameter.

[0007] According to another embodiment of the present disclosure, obtaining relative position information of a target wireless receiving coil relative to a first wireless transmitting coil and a second wireless transmitting coil includes: sequentially powering the first wireless transmitting coil and the second wireless transmitting coil to respectively obtain a first induction parameter and a second induction parameter between the target wireless receiving coil and the first wireless transmitting coil and the second wireless transmitting coil; and determining the relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil based on the first induction parameter and the second induction parameter.

[0008] According to another embodiment of the present disclosure, in response to a change in relative position information, based on the changed relative position information, the first wireless transmitting coil is controlled to radiate a first electromagnetic wave signal with a third radiation parameter, and the second wireless transmitting coil is controlled to radiate a second electromagnetic wave signal with a fourth radiation parameter; wherein the third radiation parameter is different from the first radiation parameter, and / or the fourth radiation parameter is different from the second radiation parameter.

[0009] According to another embodiment of the present disclosure, the relative position information includes position information and / or attitude information; the relative position information represents the point relationship between the center point of the target wireless receiving coil and the center points of the first wireless transmitting coil and the second wireless transmitting coil; the attitude information represents the planar relationship between the plane where the target wireless receiving coil is located and the plane where the first wireless transmitting coil is located and the plane where the second wireless transmitting coil is located.

[0010] According to another embodiment of the present disclosure, the target direction and the plane where the target wireless receiving coil is located satisfy a position condition, and the position condition indicates that the positional relationship between the target direction and the plane where the target wireless receiving coil is located is close to a vertical relationship.

[0011] According to another embodiment of the present disclosure, the relative position information satisfies the first condition, indicating that the distance between the target wireless receiving coil and the first wireless receiving coil and / or the second wireless receiving coil is greater than a distance threshold.

[0012] According to another aspect of the present disclosure, a wireless charging method is provided, comprising: in response to detecting the presence of a target wireless receiving coil, obtaining relative position information of the target wireless receiving coil relative to a wireless transmitting coil array; if the relative position information satisfies a second condition, based on the relative position information, controlling the wireless transmitting coil array to radiate electromagnetic wave signals with a target radiation parameter group to form a target magnetic field that produces a change in magnetic flux in a target direction; wherein the wireless transmitting coil array comprises N wireless transmitting coils, the target radiation parameter group comprises N radiation parameters, the N radiation parameters correspond one-to-one to the N wireless transmitting coils, N is not less than 2, and at least two of the N radiation parameters represent that the wireless transmitting coil is in a transmitting state; the target magnetic field is used to enable the target wireless receiving coil to convert the electromagnetic wave signal into electrical energy.

[0013] According to another aspect of the present disclosure, a wireless charging device is provided, including: a controller, a first wireless transmitting coil, and a second wireless transmitting coil, wherein the controller is configured to: in response to detecting the presence of a target wireless receiving coil, obtain relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil; if the relative position information satisfies a first condition, based on the relative position information, control the first wireless transmitting coil to radiate a first electromagnetic wave signal with a first radiation parameter, and control the second wireless transmitting coil to radiate a second electromagnetic wave signal with a second radiation parameter; wherein the first electromagnetic wave signal radiated with the first radiation parameter and the second electromagnetic wave signal radiated with the second radiation parameter cooperate to form a target magnetic field that produces a change in magnetic flux in a target direction; and the target magnetic field is configured to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy.

[0014] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0016] Figure 1 is a schematic flow chart of a wireless charging method according to an embodiment of the present disclosure;

[0017] Figure 2A~2C is a schematic diagram of a wireless charging method according to an embodiment of the present disclosure;

[0018] Figure 3 is a schematic diagram of determining a relative position according to an embodiment of the present disclosure;

[0019] Figure 4 is a wireless charging equivalent circuit diagram according to an embodiment of the present disclosure;

[0020] Figure 5 is an equivalent circuit diagram between a wireless transmitting coil and a wireless receiving coil according to an embodiment of the present disclosure;

[0021] Figure 6 is a schematic flow chart of a wireless charging method according to another embodiment of the present disclosure;

[0022] Figure 7 is an overall architecture diagram of a wireless charging method according to an embodiment of the present disclosure;

[0023] Figure 8A~Figure 8B is a schematic diagram of the arrangement of the wireless transmitting coil according to an embodiment of the present disclosure;

[0024] Fig. 9is a schematic structural block diagram of a wireless charging device according to an embodiment of the present disclosure;

[0025] Fig.10 is a schematic structural block diagram of a wireless charging device according to another embodiment of the present disclosure; and

[0026] Fig.11 It is a structural block diagram of an electronic device used to implement the wireless charging method of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0028] In the technical solutions disclosed in this disclosure, the collection, storage, use, processing, transmission, provision and disclosure of user personal information involved are in compliance with the relevant laws and regulations and do not violate public order and good morals. In the technical solutions disclosed in this disclosure, the user's authorization or consent is obtained before obtaining or collecting user personal information.

[0029] In the related art, a wireless charging device can be installed with multiple wireless transmitting coils. During operation, according to the placement of the device to be charged, a wireless transmitting coil closest to the device to be charged is selected from the multiple wireless transmitting coils, and then only the current generated in the wireless transmitting coil is controlled to generate a magnetic field, thereby charging the device to be charged.

[0030] Take the relative distribution of the wireless transmitting coil and the wireless receiving coil as an example. During the charging process, the wireless transmitting coil is energized by the power supply to form a circular current. The circular current generates a magnetic field, and some magnetic lines of force pass through the wireless receiving coil. The changing magnetic flux causes the wireless receiving coil to generate an induced current, thereby charging. It can be seen that the number of magnetic lines of force passing through the wireless receiving coil will affect the charging efficiency. Therefore, when the receiving coil and the transmitting coil are far apart or the centers of the two are offset, the magnetic lines of force passing through the wireless receiving coil will decrease, thereby affecting the charging efficiency.

[0031] Therefore, in practical applications, the above technical solution requires that the device to be charged and the wireless charging device be close together, and the device to be charged needs to be placed in a specific area. If there is a certain distance between the device to be charged and the wireless charging device, or the device to be charged is offset from the optimal position, the charging efficiency will be greatly reduced or even unable to charge.

[0032] The disclosed embodiments aim to provide a wireless charging method. During the charging process, at least two wireless transmitting coils in a wireless charging device cooperate to form a magnetic field toward a target wireless receiving coil. In this way, even if the device to be charged is placed in an improper position, for example, there is a certain distance between the device to be charged and the wireless charging device, or the center of the target wireless receiving coil in the device to be charged deviates from the center of the wireless transmitting coil, the wireless charging device can still charge the device to be charged with higher efficiency, thereby improving the charging efficiency.

[0033] The technical solution provided by the present disclosure will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 is a schematic flow chart of a wireless charging method according to an embodiment of the present disclosure.

[0035] like Figure 1 As shown, the wireless charging method 100 is applied to a wireless charging device, and the wireless charging method 100 may include operations S110 to S120.

[0036] In operation S110 , in response to detecting the presence of a target wireless receiving coil, relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil is acquired.

[0037] For example, the wireless charging device may include multiple wireless transmitting coils, and a sensor may be provided in the wireless charging device to detect whether there is a target wireless receiving coil near the wireless charging device and detect relative position information through the sensor. For another example, a signal may be transmitted by the wireless transmitting coil to detect whether there is a target wireless receiving coil near the wireless charging device and detect relative position information.

[0038] In operation S120, if the relative position information satisfies the first condition, based on the relative position information, the first wireless transmitting coil is controlled to radiate the first electromagnetic wave signal with the first radiation parameter, and the second wireless transmitting coil is controlled to radiate the second electromagnetic wave signal with the second radiation parameter.

[0039] It should be noted that wireless charging methods include electromagnetic induction, electromagnetic resonance, radio wave, electric field coupling, etc. This embodiment realizes charging through electromagnetic induction, that is, a changing magnetic field is generated by a changing current, and then the changing magnetic field generates a changing current. Exemplarily, a first electromagnetic wave signal radiated with a first radiation parameter cooperates with a second electromagnetic wave signal radiated with a second radiation parameter to form a target magnetic field that produces a change in magnetic flux in the target direction. The target magnetic field is used to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy. The target direction is, for example, the direction toward the wireless receiving coil. Furthermore, the target direction can be close to a perpendicular relationship with the plane where the wireless receiving coil is located. The closer to the perpendicular relationship, the more magnetic flux passes through the wireless receiving coil, and the faster the charging efficiency.

[0040] For example, the feeding parameters of each wireless transmitting coil in the wireless charging device can be determined according to the relative position information, such as determining whether each wireless transmitting coil has current, the current value, whether the phase is changed, etc.

[0041] For example, a wireless charging device may include multiple wireless transmitting coils, and during the charging process, at least two wireless transmitting coils will radiate electromagnetic wave signals. The first wireless transmitting coil and the second wireless transmitting coil may be any two of the multiple wireless transmitting coils. It is understandable that in addition to the first wireless transmitting coil and the second wireless transmitting coil, other wireless transmitting coils may radiate electromagnetic wave signals. It should be noted that the first wireless transmitting coil and the second wireless transmitting coil are both coils in the transmitting state, that is, the currents of the first wireless transmitting coil and the second wireless transmitting coil are not zero. In addition, when the first wireless transmitting coil and the second wireless transmitting coil are different, the target magnetic field formed by the cooperation is different. In addition, if the first radiation parameter radiation and the second radiation parameter radiation are different, the target magnetic field formed by the cooperation is different.

[0042] According to the technical solution provided by the embodiment of the present disclosure, during the charging process, at least two wireless transmitting coils in the wireless charging device cooperate to form a magnetic field toward the target wireless receiving coil, so that even if the device to be charged is placed in an improper position, for example, there is a certain distance between the device to be charged and the wireless charging device, or the center of the target wireless receiving coil in the device to be charged deviates from the center of the wireless transmitting coil, the wireless charging device can still charge the device to be charged with higher efficiency, thereby improving the charging efficiency. In addition, the device to be charged is no longer limited to a fixed area, which is more convenient for users to use and improves the user experience.

[0043] According to another embodiment of the present disclosure, taking the wireless transmitting coil as an example, if the position of the wireless receiving coil is different, then the orientation of the wireless receiving coil relative to each wireless transmitting coil is different; if the posture of the wireless receiving coil is different, then the direction perpendicular to the plane where the wireless receiving coil is located will also be different. Therefore, the direction of the target magnetic field required for efficient charging of wireless receiving coils at different positions and / or different postures will also be different. In this embodiment, if the relative position information is different, the radiation parameters of the wireless transmitting coil used for charging are different. Specifically, if the relative position information is the first relative position, the first radiation parameter is the first sub-radiation parameter, and the second radiation parameter is the second sub-radiation parameter. If the relative position information is the second relative position, the first radiation parameter is the third sub-radiation parameter, and the second radiation parameter is the fourth sub-radiation parameter. And the above-mentioned first sub-radiation parameter is different from the third sub-radiation parameter, and / or the second sub-radiation parameter is different from the fourth sub-radiation parameter. It can be seen that in this embodiment, for two wireless receiving coils with different relative position information, the first radiation parameter of the first wireless transmitting coil is different, and / or the second radiation parameter of the second wireless transmitting coil is different, which can be quickly charged for wireless receiving coils with different relative position information.

[0044] According to another embodiment of the present disclosure, the radiation parameter of the wireless transmitting coil represents at least one of the phase and the current value, and the first radiation parameter of the first wireless transmitting coil is different from the second radiation parameter of the second wireless transmitting coil. For example, the phase represented by the first radiation parameter is different from the phase represented by the second radiation parameter. For another example, the current value represented by the first radiation parameter is different from the current value represented by the second radiation parameter. For another example, the phase and current value represented by the first radiation parameter are different from the phase and current value represented by the second radiation parameter. In this way, by changing the current of the first wireless transmitting coil and the second wireless transmitting coil, and / or changing the phase of the first wireless transmitting coil and the second wireless transmitting coil, the target direction of the target magnetic field formed by the cooperation of each wireless transmitting coil for power supply changes, and then when the wireless receiving coil is in different positions and / or different postures, the target magnetic field can be directed toward the wireless receiving coil, or as perpendicular to the plane where the wireless receiving coil is located as possible, thereby achieving an efficient charging effect.

[0045] According to another embodiment of the present disclosure, the relative position information includes position information, and the relative position information represents the position relationship between the center point of the target wireless receiving coil and the center points of the first wireless transmitting coil and the second wireless transmitting coil. It can be seen that, assuming that the multiple wireless transmitting coils in the wireless charging device constitute a reference plane, and a reference line is perpendicular to the reference plane, the position relationship can reflect the distance from the center point of the target wireless receiving coil to the reference plane, and can also reflect the distance from the center point of the target wireless receiving coil to the reference line.

[0046] According to another embodiment of the present disclosure, the relative position information includes posture information, and the posture information represents the planar relationship between the first plane where the target wireless receiving coil is located, the second plane where the first wireless transmitting coil is located, and the third plane where the second wireless transmitting coil is located. It can be seen that the planar relationship can reflect the angle between the first plane and the second plane, and can also reflect the angle between the first plane and the third plane. In some embodiments, the second plane and the third plane can be parallel, and further the second plane and the third plane can be coplanar.

[0047] According to another embodiment of the present disclosure, the relative position information includes position information and posture information.

[0048] According to another embodiment of the present disclosure, the target direction and the plane where the target wireless receiving coil is located meet the position condition. For example, the position condition may include: the angle between the target direction and the plane where the target wireless receiving coil is located is within the range of 90°±α°, and α is less than the angle threshold, and the angle threshold may be 2°, 3°, etc., which is not limited in this embodiment. It can be seen that the position condition characterizes that the positional relationship between the target direction and the plane where the target wireless receiving coil is located is close to a vertical relationship, so that the charging efficiency is high.

[0049] Figure 2A~2C is a schematic diagram of a wireless charging method according to an embodiment of the present disclosure.

[0050] According to another embodiment of the present disclosure, it is possible to first detect whether there is a target wireless receiving coil, and then, if it is determined that there is a target wireless receiving coil, determine whether the relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil meets the first condition. In some embodiments, it is possible to detect whether the relative position information meets the first condition at predetermined intervals.

[0051] In an example, the relative position information meeting the first condition indicates that the distance between the target wireless receiving coil and the first wireless transmitting coil and / or the second wireless transmitting coil is greater than a distance threshold.

[0052] If the relative position information satisfies the first condition, it may indicate that the distance between the target wireless receiving coil and the first wireless transmitting coil and the second wireless transmitting coil is relatively far. At this time, the target wireless receiving coil may be charged by forming a target magnetic field through the cooperation of at least two wireless transmitting coils in the wireless charging device. For example, based on the relative position information, the first wireless transmitting coil may be controlled to radiate the first electromagnetic wave signal with the first radiation parameter, and the second wireless transmitting coil may be controlled to radiate the second electromagnetic wave signal with the second radiation parameter, so that the target magnetic field is formed by the cooperation of the first wireless transmitting coil and the second wireless transmitting coil. In this embodiment, when the distance between the device to be charged and the wireless charging device is relatively far, the radiation parameters of each wireless transmitting coil may be adjusted according to the relative position information between the device to be charged and the wireless charging device, so that the device to be charged forms a target magnetic field in the target direction. In some embodiments, the target magnetic field may be a narrow beam, and a narrow beam refers to a narrow beam width of the target magnetic field, which may increase the magnetic flux passing through the wireless receiving coil, thereby improving the charging efficiency.

[0053] For example, Figure 2A and Figure 2B As shown, the distance between the wireless receiving coil 210 and each wireless transmitting coil is relatively far. At this time, at least two transmitting coils can be controlled to radiate electromagnetic wave signals, and each electromagnetic wave signal cooperates to form a target magnetic field pointing to the wireless receiving coil 210 .

[0054] If the relative position information does not meet the first condition, the target wireless receiving coil can be charged by a single wireless transmitting coil in the wireless charging device. For example, the first wireless transmitting coil can be controlled to radiate a third electromagnetic wave signal so that the target wireless receiving coil receives the third electromagnetic wave signal and converts the third electromagnetic wave signal into electrical energy. For another example, the second wireless transmitting coil can be controlled to radiate a fourth electromagnetic wave signal so that the target wireless receiving coil receives the fourth electromagnetic wave signal and converts the fourth electromagnetic wave signal into electrical energy. For another example, a wireless transmitting coil other than the first wireless transmitting coil and the second wireless transmitting coil in the wireless charging device can be controlled to radiate an electromagnetic wave signal so that the target wireless receiving coil receives the electromagnetic wave signal and converts the electromagnetic wave signal into electrical energy.

[0055] In addition, in some embodiments, if the relative position information does not meet the first condition, the power supply current of the multiple wireless transmitting coils can be controlled according to the levels of the multiple wireless transmitting coils, wherein the level is determined according to the distance between the wireless transmitting coil and the target wireless receiving coil, the level is negatively correlated with the distance, and the level is positively correlated with the power supply current. In this way, the closer the distance between the wireless transmitting coil and the target wireless receiving coil, the greater the current of the wireless transmitting coil; the farther the distance between the wireless transmitting coil and the target wireless receiving coil, the smaller the current of the wireless transmitting coil or no current.

[0056] For example, Figure 2C As shown, the distance between the wireless receiving coil 210 and the wireless transmitting coil 220 is relatively close. At this time, the wireless transmitting coil 220 can be powered, and a magnetic field is generated by the wireless transmitting coil 220 to charge the wireless receiving coil 210 .

[0057] According to another embodiment of the present disclosure, during the charging process, in response to a change in relative position information, the radiation parameters of at least one of the first wireless transmitting coil and the second wireless transmitting coil can be changed. For example, based on the changed relative position information, the first wireless transmitting coil can be controlled to radiate the first electromagnetic wave signal with a third radiation parameter, and the second wireless transmitting coil can be controlled to radiate the second electromagnetic wave signal with a fourth radiation parameter. The third radiation parameter is different from the first radiation parameter, and / or the fourth radiation parameter is different from the second radiation parameter. In practical applications, when the position of the device to be charged changes, the radiation parameters of the wireless transmitting coil can be automatically adjusted to ensure charging efficiency.

[0058] According to another embodiment of the present disclosure, during the charging process, in response to a change in relative position information, the wireless transmitting coil used for charging can be re-determined. For example, the first wireless transmitting coil and at least one other wireless transmitting line can be controlled to radiate electromagnetic wave signals, and the current second wireless transmitting coil can be controlled to stop radiating electromagnetic wave signals. For another example, the second wireless transmitting coil and at least one other wireless transmitting line can be controlled to radiate electromagnetic wave signals, and the current first wireless transmitting coil can be controlled to stop radiating electromagnetic wave signals. For another example, two other wireless transmitting lines can radiate electromagnetic wave signals, and the current first wireless transmitting coil and the second wireless transmitting coil can be controlled to stop radiating electromagnetic wave signals. In actual applications, when the position of the device to be charged changes, the radiation parameters of the wireless transmitting coil can be automatically adjusted to ensure charging efficiency.

[0059] According to another embodiment of the present disclosure, this embodiment describes a process of determining relative position information of a target wireless receiving coil relative to a first wireless transmitting coil and a second wireless transmitting coil.

[0060] Some wireless transmitting coils in the wireless charging device can be powered in sequence to obtain the induction parameters between the target wireless receiving coil and the wireless transmitting coil in the powered state. For example, the first wireless transmitting coil and the second wireless transmitting coil are powered to obtain the first induction parameter and the second induction parameter between the target wireless receiving coil and the first wireless transmitting coil and the second wireless transmitting coil, respectively. Then, the relative position information can be determined based on the induction parameters. For example, the relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil is determined based on the first induction parameter and the second induction parameter.

[0061] Figure 3 is a schematic diagram of determining relative positions according to an embodiment of the present disclosure.

[0062] like Figure 3 As shown, in the process of determining the relative position information, the distance between a single wireless transmitting coil and a target wireless receiving coil can be determined first. For example, the distances L1, L2, and L3 between the wireless receiving coil 310 and a plurality of wireless transmitting coils are first determined, and then the relative position information is determined based on the multiple distances L1, L2, and L3 between the multiple wireless transmitting coils and the target wireless receiving coils. For example, a sphere is determined with the center of a wireless transmitting coil as the center of a circle and the distance between the wireless transmitting coil and the target wireless receiving coil as the radius. In this way, multiple wireless transmitting coils can determine multiple spherical surfaces, and the relative position information can be determined based on the intersection points of the multiple spherical surfaces.

[0063] Figure 4 is a wireless charging equivalent circuit diagram according to an embodiment of the present disclosure.

[0064] Next, combine Figure 4 A process for determining the distance between a single wireless transmit coil and a target wireless receive coil is described.

[0065] For example, the degree of coupling between the target wireless transmitting coil and the target wireless receiving coil may be determined based on the mutual inductance between the target wireless transmitting coil and the target wireless receiving coil, the inductance of the target wireless transmitting coil, and the inductance of the target wireless receiving coil. Then, the distance between the target wireless transmitting coil and the target wireless receiving coil may be determined based on the coupling degree, the transmitting power of the target wireless transmitting coil, the receiving power of the target wireless receiving coil, and the operating frequency.

[0066] exist Figure 4 In the figure, the left side is the wireless transmitting coil part, the right side is the wireless receiving coil part, the internal resistance of the power source is Rs, the circuit load impedance is RL, the series equivalent inductance of the transmitting resonant coil is L1, the equivalent capacitance C1, the equivalent resistance R1, the series equivalent inductance of the receiving resonant coil is L2, the equivalent capacitance C2, the equivalent resistance R2. The coupling coefficient between the transmitting coil and the receiving coil is k, and the mutual inductance is M. According to Kirchhoff's voltage law (KVL), the equation group is obtained:

[0067]

[0068] Where I1 is the current in the left loop of the figure, and I2 is the current in the right loop of the figure. In the same resonant system, the mutual inductance between the transmitting coil and the receiving coil is the same, that is:

[0069] M 12 =M 21 =M

[0070] Therefore, the coupling degree calculation formula between the wireless transmitting coil and the wireless receiving coil is as follows:

[0071]

[0072] After the coupling degree is obtained, the distance between the wireless transmitting coil and the wireless receiving coil can be determined. For example, the transmitting power of the wireless transmitting coil is Ptx, the gain of the wireless transmitting coil is Gtx, the receiving power and gain of the wireless receiving coil are Prx and Grx respectively, and the distance between the wireless transmitting coil and the wireless receiving coil is Dr. According to the Friis distance equation, it can be obtained:

[0073]

[0074] In the above formula, GtxGrx is represented by coupling degree k in this embodiment, c is a constant of light speed, f0 is the operating frequency, Prx and Ptx can be calculated by the current and resistance in the circuit, so the distance Dr between the wireless transmitting coil part and the wireless receiving coil can be determined.

[0075] In some embodiments, the multiple wireless transmitting coils in the wireless charging device can be divided into multiple coil groups, each coil group can include several wireless transmitting coils, and the wireless transmitting coils in different coil groups can be partially the same or completely different. Then, the above method can be used to determine a relative position using the wireless transmitting coils in the same coil group, and the relative position is called a reference relative position. In this way, multiple reference relative positions can be obtained using multiple coil groups. Then, relative position information can be determined based on multiple reference relative positions. For example, multiple reference relative positions can verify each other's accuracy, making the relative position information more accurate.

[0076] Figure 5 is an equivalent circuit diagram between a wireless transmitting coil and a wireless receiving coil according to an embodiment of the present disclosure.

[0077] Next, combine Figure 5 The process of stopping charging is described. Figure 5As shown, the left side is the wireless transmitting coil part, and the right side is the wireless receiving coil part. There is a variable resistor RL in the matching of the wireless receiving coil. When the device to be charged is charged normally, because the current I2 in the right circuit is relatively large, the resistance value of the variable resistor RL is relatively small. The product of the circuit and the resistance is the voltage, and the voltage is constant in the circuit diagram. When the device to be charged is fully charged, the current I2 in the right circuit is small, and the resistance value of the variable resistor RL is large at this time. The wireless transmitting coil can periodically transmit a pulse signal to detect the change in the resistance value of the variable resistor RL, and when the resistance value RL of the variable resistor RL is greater than or equal to the resistance value threshold, the wireless charging device is controlled to stop charging.

[0078] In other embodiments, the wireless charging device can communicate with a device to be charged that is provided with a target wireless receiving coil, and obtain the remaining power of the device to be charged, and control the wireless charging device to stop charging when the remaining power is greater than or equal to a power threshold.

[0079] Figure 6 is a schematic flow chart of a wireless charging method according to another embodiment of the present disclosure.

[0080] like Figure 6 As shown, the wireless charging method 600 is applied to a wireless charging device, and the wireless charging method 600 may include operations S610 to S620.

[0081] In operation S610 , in response to detecting the presence of a target wireless receiving coil, relative position information of the target wireless receiving coil relative to the wireless transmitting coil array is acquired.

[0082] In operation S620, if the relative position information satisfies the second condition, based on the relative position information, the wireless transmitting coil array is controlled to radiate electromagnetic wave signals with a target radiation parameter group to form a target magnetic field that generates a change in magnetic flux in the target direction. The wireless transmitting coil array includes N wireless transmitting coils, the target radiation parameter group includes N radiation parameters, the N radiation parameters correspond to the N wireless transmitting coils one by one, N is not less than 2, and at least two of the N radiation parameters represent that the wireless transmitting coil is in a transmitting state; the target magnetic field is used to enable the target wireless receiving coil to convert the electromagnetic wave signal into electrical energy.

[0083] In this embodiment, the wireless transmitting coil array includes multiple wireless transmitting coils, some of which may be in the transmitting state, that is, the current of some of the wireless transmitting coils is not zero, thereby radiating electromagnetic wave signals, or all of the wireless transmitting coils may be in the transmitting state, that is, the current of all of the wireless transmitting coils is not zero, but the number of wireless transmitting coils in the transmitting state in the wireless transmitting coil array is at least two. During the charging process, the transmitting state of the wireless transmitting coil can be adjusted according to the relative position information relative to the wireless receiving coil. For the wireless transmitting coils in the transmitting state, the radiation parameters of different wireless transmitting coils may be the same or different. The different radiation parameters of the two wireless transmitting coils may be different currents and / or different phases. The wireless transmitting coils in the transmitting state cooperate to form a target magnetic field, thereby charging the device to be charged.

[0084] In this embodiment, the target magnetic field generated by different wireless transmitting coils in the transmitting state may be different. If the radiation parameters of the wireless transmitting coil in the transmitting state change, such as the current and / or phase of a wireless transmitting coil changes, the direction of the target magnetic field may also change accordingly. In this way, even if the position and / or posture of the wireless receiving coil changes, the wireless transmitting coil array can change the direction of the generated target magnetic field by adjusting the transmitting state of each wireless transmitting coil and / or adjusting the radiation parameters of the wireless transmitting coil, so that the target magnetic field is as close to the wireless receiving coil as possible, or further makes the target magnetic field approach to the plane perpendicular to the wireless receiving coil, thereby increasing the magnetic flux passing through the wireless receiving coil, thereby ensuring efficient charging of the device to be charged.

[0085] In this embodiment, the wireless transmitting coil array can cooperate to form a magnetic field toward the target wireless receiving coil, so that even if the device to be charged is placed in an improper position, the wireless charging device can still charge the device to be charged with high efficiency, thereby improving the charging efficiency.

[0086] In this embodiment, the second condition may be that the distance between the target wireless receiving coil and the wireless transmitting coil array is greater than a threshold.

[0087] According to another embodiment of the present disclosure, the relative position information of the target wireless receiving coil with respect to the wireless transmitting coil array may be determined in the following manner.

[0088] In this embodiment, several wireless transmitting coils in the wireless transmitting coil array may be powered in sequence, so as to obtain the induction parameters between the wireless transmitting coil and the target wireless receiving coil, and the induction may include the inductance of the wireless transmitting coil, the inductance of the target wireless receiving coil, and the mutual inductance between the wireless transmitting coil and the target wireless receiving coil. The relative position information of the target wireless receiving coil relative to the wireless transmitting coil array may be determined according to the induction parameters.

[0089] For example, the wireless transmitting coil array includes a first wireless transmitting coil and a second wireless transmitting coil. The first wireless transmitting coil and the second wireless transmitting coil can be powered in sequence to obtain the first sensing parameter and the second sensing parameter between the target wireless receiving coil and the first wireless transmitting coil and the second wireless transmitting coil, respectively. Then, the relative position information of the target wireless receiving coil relative to the wireless transmitting coil array can be determined based on the first sensing parameter and the second sensing parameter.

[0090] In the process of determining the relative position information, the distances between a plurality of wireless transmitting coils in the wireless transmitting coil array and the target wireless receiving coil may be determined first. Then, the relative position information is determined based on the plurality of distances between the plurality of wireless transmitting coils and the target wireless receiving coil. The method of determining the distance between a single wireless transmitting coil and the target wireless receiving coil, and the method of determining the relative position information based on the plurality of distances may be referred to above, and will not be described in detail in this embodiment.

[0091] In addition, in some embodiments, the multiple wireless transmitting coils in the wireless transmitting coil array can be divided into multiple coil groups, each coil group can include several wireless transmitting coils, and a reference relative position can be determined using the wireless transmitting coils in the same coil group. Then, the relative position information can be determined based on the multiple reference relative positions of the multiple coil groups. In this way, the reference relative positions of different coil groups can be verified with each other, avoiding the problem of inaccurate relative position information caused by only determining one reference relative position and the reference relative position is inaccurate, thereby improving the accuracy of the relative position information.

[0092] The present disclosure also provides a wireless charging device, including a controller and a first wireless transmitting coil and a second wireless transmitting coil. The controller is used to execute any one of the wireless charging methods described above. For example, the controller is used to execute: in response to detecting the presence of a target wireless receiving coil, obtain the relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil. If the relative position information satisfies the first condition, based on the relative position information, the first wireless transmitting coil is controlled to radiate a first electromagnetic wave signal with a first radiation parameter, and the second wireless transmitting coil is controlled to radiate a second electromagnetic wave signal with a second radiation parameter. The first electromagnetic wave signal radiated with the first radiation parameter cooperates with the second electromagnetic wave signal radiated with the second radiation parameter to form a target magnetic field that produces a change in magnetic flux in the target direction; the target magnetic field is used to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy.

[0093] The present disclosure also provides a wireless charging device, including a controller and a wireless transmitting coil array. The controller is used to execute any one of the wireless charging methods described above, for example, the controller is used to execute: in response to detecting the presence of a target wireless receiving coil, obtaining the relative position information of the target wireless receiving coil relative to the wireless transmitting coil array. If the relative position information satisfies the second condition, based on the relative position information, the wireless transmitting coil array is controlled to radiate electromagnetic wave signals with a target radiation parameter group to form a target magnetic field that produces a change in magnetic flux in the target direction. Wherein, the wireless transmitting coil array includes N wireless transmitting coils, the target radiation parameter group includes N radiation parameters, the N radiation parameters correspond one-to-one to the N wireless transmitting coils, N is not less than 2, and at least two of the N radiation parameters represent that the wireless transmitting coil is in a transmitting state; the target magnetic field is used to enable the target wireless receiving coil to convert the electromagnetic wave signal into electrical energy.

[0094] Figure 7 is an overall architecture diagram of a wireless charging method according to an embodiment of the present disclosure.

[0095] like Figure 7 As shown, in this embodiment, the wireless charging device may include a power supply 711, a first matching network 712, a wireless transmitting coil 713 and a controller 714, and the device to be charged may include a wireless receiving coil 721, a second matching network 722 and a power storage device 723.

[0096] During the charging process, the power supply 711 provides energy to the wireless transmitting coil 713 through the first matching network 712, wherein the first matching network 712 can convert the direct current or alternating current of the power supply 711 into an alternating current of a specific frequency. The specific frequency is the operating frequency of the wireless transmitting coil 713 and the wireless receiving coil 721, and is also the operating frequency of wireless charging. Powering the wireless transmitting coil 713 can cause the wireless transmitting coil 713 to radiate electromagnetic wave signals, and the wireless receiving coil 721 converts the electromagnetic wave signals into electrical energy, which is then stored in the power storage device 723 through the second matching network 722.

[0097] During the charging process, the current intensity and phase characteristics of each wireless transmitting coil 713 are controlled by the controller 714. The wireless receiving coil 721 can feed back charging parameters to the controller 714, such as inductance and current. The controller 714 can determine the feeding parameters based on the charging parameters, and then control the radiation parameters of each wireless transmitting coil 713.

[0098] Figure 8A~Figure 8B It is a schematic diagram of the arrangement of the wireless transmitting coil according to an embodiment of the present disclosure.

[0099] In this embodiment, the wireless charging device may include a charging plate, and a plurality of wireless transmitting coils are disposed on the charging plate. The arrangement of the wireless transmitting coils may be arranged according to the shape of the charging plate, for example, Fig. 8A As shown, for a circular wireless charging plate 811, a plurality of wireless transmitting coils 812 can be arranged in a circle. Figure 8B As shown, for a rectangular wireless charging plate 812 , a plurality of wireless transmitting coils 822 may be arranged in a rectangular shape.

[0100] According to another embodiment of the present disclosure, a wireless charging device may include multiple transmitting coils, the multiple transmitting coils include a first wireless transmitting coil and a second wireless transmitting coil, and the plane where the first wireless transmitting coil is located may be parallel to or coplanar with the plane where the second wireless transmitting coil is located. In some embodiments, the planes where the multiple transmitting coils in the wireless charging device are located may all be parallel or coplanar.

[0101] According to another embodiment of the present disclosure, in a direction perpendicular to the plane where the first wireless transmitting coil is located, the first wireless transmitting coil and the second wireless transmitting coil do not overlap. In some embodiments, multiple transmitting coils in a wireless charging device may be distributed in an array, and the planes where the various transmitting coils are located may be parallel to a certain reference plane. In a direction perpendicular to the reference plane, the various transmitting coils may not overlap.

[0102] Fig. 9 is a schematic structural block diagram of a wireless charging device according to an embodiment of the present disclosure.

[0103] like Fig. 9 As shown, the wireless charging device 900 may include a first acquisition module 910 and a first control module 920 .

[0104] The first acquisition module 910 is used for acquiring relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil in response to detecting the existence of the target wireless receiving coil.

[0105] The first control module 920 is used to control the first wireless transmitting coil to radiate the first electromagnetic wave signal with the first radiation parameter and the second wireless transmitting coil to radiate the second electromagnetic wave signal with the second radiation parameter if the relative position information satisfies the first condition, based on the relative position information; wherein the first electromagnetic wave signal radiated with the first radiation parameter and the second electromagnetic wave signal radiated with the second radiation parameter cooperate to form a target magnetic field that produces a change in magnetic flux in the target direction; the target magnetic field is used to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy.

[0106] According to another embodiment of the present disclosure, if the relative position information is a first relative position, the first radiation parameter is a first sub-radiation parameter, and the second radiation parameter is a second sub-radiation parameter; if the relative position information is a second relative position, the first radiation parameter is a third sub-radiation parameter, and the second radiation parameter is a fourth sub-radiation parameter; wherein the first sub-radiation parameter is different from the third sub-radiation parameter, and / or the second sub-radiation parameter is different from the fourth sub-radiation parameter.

[0107] According to another embodiment of the present disclosure, the phase characterized by the first radiation parameter is different from the phase characterized by the second radiation parameter; and / or the current value characterized by the first radiation parameter is different from the current value characterized by the second radiation parameter.

[0108] According to another embodiment of the present disclosure, the first acquisition module includes: an acquisition submodule and a determination submodule. The acquisition submodule is used to sequentially power the first wireless transmitting coil and the second wireless transmitting coil to respectively acquire the first induction parameter and the second induction parameter between the target wireless receiving coil and the first wireless transmitting coil and the second wireless transmitting coil. The determination submodule is used to determine the relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil based on the first induction parameter and the second induction parameter.

[0109] According to another embodiment of the present disclosure, the control module is used to respond to a change in relative position information, and based on the changed relative position information, control the first wireless transmitting coil to radiate a first electromagnetic wave signal with a third radiation parameter, and control the second wireless transmitting coil to radiate a second electromagnetic wave signal with a fourth radiation parameter; wherein the third radiation parameter is different from the first radiation parameter, and / or the fourth radiation parameter is different from the second radiation parameter.

[0110] According to another embodiment of the present disclosure, the relative position information includes position information and / or attitude information; the relative position information represents the point relationship between the center point of the target wireless receiving coil and the center points of the first wireless transmitting coil and the second wireless transmitting coil; the attitude information represents the planar relationship between the plane where the target wireless receiving coil is located and the plane where the first wireless transmitting coil is located and the plane where the second wireless transmitting coil is located.

[0111] According to another embodiment of the present disclosure, the target direction and the plane where the target wireless receiving coil is located satisfy a position condition, and the position condition indicates that the positional relationship between the target direction and the plane where the target wireless receiving coil is located is close to a vertical relationship.

[0112] According to another embodiment of the present disclosure, the relative position information satisfies the first condition, indicating that the distance between the target wireless receiving coil and the first wireless receiving coil and / or the second wireless receiving coil is greater than a distance threshold.

[0113] Fig.10 is a schematic structural block diagram of a wireless charging device according to another embodiment of the present disclosure.

[0114] like Fig.10 As shown, the wireless charging device 1000 may include a second acquisition module 1010 and a second control module 1020 .

[0115] The second acquisition module 1010 is used to acquire relative position information of the target wireless receiving coil with respect to the wireless transmitting coil array in response to detecting the existence of the target wireless receiving coil.

[0116] The second control module 1020 is used to control the wireless transmitting coil array to radiate electromagnetic wave signals with a target radiation parameter group based on the relative position information if the relative position information satisfies the second condition, so as to form a target magnetic field that produces a magnetic flux change in the target direction; wherein the wireless transmitting coil array includes N wireless transmitting coils, the target radiation parameter group includes N radiation parameters, the N radiation parameters correspond to the N wireless transmitting coils one-to-one, N is not less than 2, and at least two of the N radiation parameters represent that the wireless transmitting coil is in a transmitting state; the target magnetic field is used to enable the target wireless receiving coil to convert the electromagnetic wave signal into electrical energy.

[0117] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, including at least one processor; and a memory communicatively connected to the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned wireless charging method.

[0118] According to an embodiment of the present disclosure, the present disclosure further provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute the above-mentioned wireless charging method.

[0119] According to an embodiment of the present disclosure, the present disclosure further provides a computer program product, including a computer program, and the computer program implements the above wireless charging method when executed by a processor.

[0120] Fig.11 A schematic block diagram of an example electronic device that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0121] like Fig.11 As shown, the device 1100 includes a computing unit 1101, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 1102 or a computer program loaded from a storage unit 1108 to a random access memory (RAM) 1103. In the RAM 1103, various programs and data required for the operation of the device 1100 can also be stored. The computing unit 1101, the ROM 1102, and the RAM 1103 are connected to each other via a bus 1104. An input / output (I / O) interface 1105 is also connected to the bus 1104.

[0122] A number of components in the device 1100 are connected to the I / O interface 1105, including: an input unit 1106, such as a keyboard, a mouse, etc.; an output unit 1107, such as various types of displays, speakers, etc.; a storage unit 1108, such as a disk, an optical disk, etc.; and a communication unit 1109, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 1109 allows the device 1100 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0123] The computing unit 1101 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 1101 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 1101 performs the various methods and processes described above, such as the wireless charging method. For example, in some embodiments, the wireless charging method may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 1108. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 1100 via the ROM 1102 and / or the communication unit 1109. When the computer program is loaded into the RAM 1103 and executed by the computing unit 1101, one or more steps of the wireless charging method described above may be performed. Alternatively, in other embodiments, the computing unit 1101 may be configured to perform the wireless charging method in any other appropriate manner (e.g., by means of firmware).

[0124] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0125] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0126] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0127] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0128] The systems and techniques described herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0129] A computer system may include clients and servers. Clients and servers are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship to each other.

[0130] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0131] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A wireless charging method, comprising: In response to detecting the presence of a target wireless receiving coil, obtaining relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil; If the relative position information satisfies a first condition, based on the relative position information, controlling the first wireless transmitting coil to radiate a first electromagnetic wave signal with a first radiation parameter, and controlling the second wireless transmitting coil to radiate a second electromagnetic wave signal with a second radiation parameter; Among them, the first electromagnetic wave signal radiated with the first radiation parameter and the second electromagnetic wave signal radiated with the second radiation parameter cooperate to form a target magnetic field that produces a magnetic flux change in the target direction; the target magnetic field is used to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy.

2. The method according to claim 1, wherein: If the relative position information is a first relative position, the first radiation parameter is a first sub-radiation parameter, and the second radiation parameter is a second sub-radiation parameter; If the relative position information is a second relative position, the first radiation parameter is a third sub-radiation parameter, and the second radiation parameter is a fourth sub-radiation parameter; The first sub-radiation parameter is different from the third sub-radiation parameter, and / or the second sub-radiation parameter is different from the fourth sub-radiation parameter.

3. The method according to claim 1, wherein: The phase characterized by the first radiation parameter is different from the phase characterized by the second radiation parameter; and / or The current value represented by the first radiation parameter is different from the current value represented by the second radiation parameter.

4. The method according to claim 1, wherein: The obtaining of relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil includes: Powering the first wireless transmitting coil and the second wireless transmitting coil in sequence, and acquiring a first induction parameter and a second induction parameter between the target wireless receiving coil and the first wireless transmitting coil and the second wireless transmitting coil respectively; Based on the first sensing parameter and the second sensing parameter, relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil is determined.

5. The method according to claim 1, wherein: In response to a change in the relative position information, based on the changed relative position information, controlling the first wireless transmitting coil to radiate a first electromagnetic wave signal with a third radiation parameter, and controlling the second wireless transmitting coil to radiate a second electromagnetic wave signal with a fourth radiation parameter; The third radiation parameter is different from the first radiation parameter, and / or the fourth radiation parameter is different from the second radiation parameter.

6. The method according to claim 1, wherein: The relative position information includes position information and / or posture information; The relative position information represents the positional relationship between the center point of the target wireless receiving coil and the center points of the first wireless transmitting coil and the second wireless transmitting coil, and the posture information represents the planar relationship between the plane where the target wireless receiving coil is located and the plane where the first wireless transmitting coil is located and the plane where the second wireless transmitting coil is located.

7. The method according to claim 6, wherein: The target direction and the plane where the target wireless receiving coil is located meet a position condition, and the position condition indicates that the positional relationship between the target direction and the plane where the target wireless receiving coil is located is close to a vertical relationship.

8. The method according to claim 1, wherein: The relative position information meeting the first condition indicates that the distance between the target wireless receiving coil and the first wireless transmitting coil and / or the second wireless transmitting coil is greater than a distance threshold.

9. A wireless charging method, comprising: In response to detecting the presence of a target wireless receiving coil, obtaining relative position information of the target wireless receiving coil relative to the wireless transmitting coil array; If the relative position information satisfies a second condition, based on the relative position information, the wireless transmitting coil array is controlled to radiate electromagnetic wave signals with a target radiation parameter group to form a target magnetic field that generates a magnetic flux change in a target direction; The wireless transmitting coil array includes N wireless transmitting coils, the target radiation parameter group includes N radiation parameters, the N radiation parameters correspond to the N wireless transmitting coils one by one, N is not less than 2, and at least two of the N radiation parameters represent that the wireless transmitting coil is in a transmitting state; The target magnetic field is used to enable the target wireless receiving coil to convert the electromagnetic wave signal into electrical energy.

10. A wireless charging device, comprising: Controller; A first wireless transmitting coil and a second wireless transmitting coil; The controller is used to perform: In response to detecting the presence of a target wireless receiving coil, acquiring relative position information of the target wireless receiving coil relative to the first wireless transmitting coil and the second wireless transmitting coil; If the relative position information satisfies a first condition, based on the relative position information, controlling the first wireless transmitting coil to radiate a first electromagnetic wave signal with a first radiation parameter, and controlling the second wireless transmitting coil to radiate a second electromagnetic wave signal with a second radiation parameter; The first electromagnetic wave signal radiated with the first radiation parameter cooperates with the second electromagnetic wave signal radiated with the second radiation parameter to form a target magnetic field that produces a change in magnetic flux in the target direction; The target magnetic field is used to enable the target wireless receiving coil to convert the first electromagnetic wave signal and the second electromagnetic wave signal into electrical energy.

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