Wireless charging method, device, electronic device and storage medium

Abstract

The embodiments of the present disclosure provide a wireless charging method, device, electronic equipment and storage medium. The wireless charging method comprises: pairing a wireless charging transmitting end with a first wireless charging receiving end, obtaining first pairing magnetic field data perceived by the wireless charging transmitting end and type information of the first wireless charging receiving end; determining reference pairing magnetic field data corresponding to the first wireless charging receiving end according to the type information; and determining whether to charge the first wireless charging receiving end according to the first pairing magnetic field data and the reference pairing magnetic field data.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and in particular to a wireless charging method, apparatus, electronic device, and storage medium. Background Technology

[0002] In wireless charging, the wireless charging transmitter typically employs the following Foreign Object Debris (FOD) method:

[0003] I. FOD Method Based on Power Loss

[0004] This method calculates energy transmission loss by comparing the power of the wireless charging transmitter and receiver, or indirectly infers the presence of metallic foreign objects by monitoring interface temperature rise using a temperature sensor. It is a post-event monitoring model based on thermal effects and energy balance.

[0005] This method involves a significant delay from the introduction of a foreign object, the generation of eddies, the accumulation of heat, to its recognition by the system. This delay may result in the object overheating before power is cut off, causing burns or equipment damage.

[0006] II. Foreign Object Detection Methods Based on Q-Value

[0007] This method uses the change in the quality factor (Q) of the resonant system to determine the presence of foreign objects. When a metallic foreign object enters the magnetic field region of the transmitting coil, the resulting eddy current effect increases the equivalent series resistance, thus decreasing the Q value. The presence of the foreign object is determined by measuring the change in the Q value. This method has high detection accuracy, but it has significant limitations: it can only detect foreign objects before charging begins, cannot detect them in real time, and cannot locate them.

[0008] III. Transmitter Detection Method Based on Magnetic Field Sensor

[0009] The wireless charging transmitter includes a mounting plate and a magnetic field sensor. It detects magnetic field information by controlling the displacement of the transmitting coil and generating a detection result. This method requires the transmitting coil to be displaced in a preset direction, resulting in a complex structure and a cumbersome detection process.

[0010] Therefore, how to achieve high sensitivity, low latency, and high accuracy in wireless charging foreign object detection is an urgent problem to be solved. Summary of the Invention

[0011] This disclosure provides wireless charging methods, apparatus, electronic devices, and storage media.

[0012] According to a first aspect of the present disclosure, a wireless charging method is provided, executed by a wireless charging transmitter, the method comprising:

[0013] The wireless charging transmitter is paired with the first wireless charging receiver to obtain the first pairing magnetic field data sensed by the wireless charging transmitter and the type information of the first wireless charging receiver.

[0014] Based on the type information, determine the reference pairing magnetic field data corresponding to the first wireless charging receiver;

[0015] Based on the first paired magnetic field data and the reference paired magnetic field data, determine whether to charge the first wireless charging receiver.

[0016] In some embodiments, determining whether to charge based on the first paired magnetic field data and the reference paired magnetic field data includes at least one of the following:

[0017] In response to a first difference between the first paired magnetic field data and the reference paired magnetic field data exceeding a first threshold range, it is determined that charging will not be performed.

[0018] In response to the first difference not exceeding the first threshold range, it is determined to charge.

[0019] In some embodiments, the first difference includes the three-dimensional Euclidean distance between the first paired magnetic field data and the reference paired magnetic field data.

[0020] In some embodiments, acquiring the first pairing magnetic field data sensed by the wireless charging transmitter includes:

[0021] Obtain the raw magnetic field data determined by the magnetometer of the wireless charging transmitter at least once;

[0022] The first paired magnetic field data is determined based on the statistical values ​​of at least one original magnetic field data.

[0023] In some embodiments, the method further includes:

[0024] Determine the ambient temperature information when the wireless charging transmitter is paired with the first wireless charging receiver;

[0025] Based on the ambient temperature information, the first paired magnetic field data is compensated;

[0026] The step of determining whether to charge the first wireless charging receiver based on the first paired magnetic field data and the reference paired magnetic field data includes:

[0027] Based on the first paired magnetic field data obtained through the compensation and the reference paired magnetic field data, it is determined whether to charge the first wireless charging receiver.

[0028] In some embodiments, obtaining the type information of the first wireless charging receiver includes:

[0029] During the authentication process between the wireless charging transmitter and the first wireless charging receiver, the type information of the first wireless charging receiver is obtained.

[0030] In some embodiments, the wireless charging transmitter pre-stores reference pairing magnetic field data corresponding to different types of information;

[0031] The reference pairing magnetic field data corresponding to the different types of information are sensed by the wireless charging transmitter when it is paired with different types of wireless charging receivers.

[0032] According to a second aspect of the present disclosure, a wireless charging device is provided, disposed at a wireless charging transmitter, the device comprising: a processing module, the processing module being configured to:

[0033] The wireless charging transmitter is paired with the first wireless charging receiver to obtain the first pairing magnetic field data sensed by the wireless charging transmitter and the type information of the first wireless charging receiver.

[0034] Based on the type information, determine the reference pairing magnetic field data corresponding to the first wireless charging receiver;

[0035] Based on the first paired magnetic field data and the reference paired magnetic field data, determine whether to charge the first wireless charging receiver.

[0036] In some embodiments, the processing module is specifically used for at least one of the following:

[0037] In response to a first difference between the first paired magnetic field data and the reference paired magnetic field data exceeding a first threshold range, it is determined that charging will not be performed.

[0038] In response to the first difference not exceeding the first threshold range, it is determined to charge.

[0039] In some embodiments, the first difference includes the three-dimensional Euclidean distance between the first paired magnetic field data and the reference paired magnetic field data.

[0040] In some embodiments, the processing module is specifically used for:

[0041] Obtain the raw magnetic field data determined by the magnetometer of the wireless charging transmitter at least once;

[0042] The first paired magnetic field data is determined based on the statistical values ​​of at least one original magnetic field data.

[0043] In some embodiments, the processing module is further configured to:

[0044] Determine the ambient temperature information when the wireless charging transmitter is paired with the first wireless charging receiver;

[0045] Based on the ambient temperature information, the first paired magnetic field data is compensated;

[0046] The processing module is specifically used for:

[0047] Based on the first paired magnetic field data obtained through the compensation and the reference paired magnetic field data, it is determined whether to charge the first wireless charging receiver.

[0048] In some embodiments, the processing module is specifically used for:

[0049] During the authentication process between the wireless charging transmitter and the first wireless charging receiver, the type information of the first wireless charging receiver is obtained.

[0050] In some embodiments, the wireless charging transmitter pre-stores reference pairing magnetic field data corresponding to different types of information;

[0051] The reference pairing magnetic field data corresponding to the different types of information are sensed by the wireless charging transmitter when it is paired with different types of wireless charging receivers.

[0052] According to a third aspect of the present disclosure, an electronic device is provided, the electronic device comprising:

[0053] One or more processors;

[0054] The processor is used to invoke instructions to cause the electronic device to execute the wireless charging method described in the first aspect.

[0055] According to a fourth aspect of the present disclosure, a storage medium is provided that stores instructions that, when executed on an electronic device, cause the electronic device to perform the wireless charging method described in the first aspect.

[0056] This disclosure provides a wireless charging method, apparatus, electronic device, and storage medium. A wireless charging transmitter pairs with a first wireless charging receiver, acquiring first pairing magnetic field data sensed by the wireless charging transmitter and type information of the first wireless charging receiver; based on the type information, determining reference pairing magnetic field data corresponding to the first wireless charging receiver; and based on the first pairing magnetic field data and the reference pairing magnetic field data, determining whether to charge the first wireless charging receiver.

[0057] Thus, by acquiring and comparing real-time magnetic field data with reference paired magnetic field data before charging, potential anomalies in the charging environment can be effectively identified. This reduces the inherent delay of traditional "heating-detection" mechanisms, enabling early warning of foreign objects or abnormal environments, thereby improving detection sensitivity and accuracy. Attached Figure Description

[0058] Figure 1 This is a schematic flowchart of a wireless charging method according to an embodiment of this application. Figure 1 ;

[0059] Figure 2 This is a schematic diagram illustrating the composition of a wireless charging system according to an embodiment of this application;

[0060] Figure 3 This is a schematic flowchart of a wireless charging method according to an embodiment of this application. Figure 2 ;

[0061] Figure 4 This is a schematic diagram of an electronic device structure shown in one embodiment of this application. Detailed Implementation

[0062] To make the technical methods and beneficial effects of the present invention more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0063] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementations in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementations of other embodiments.

[0064] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0065] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0066] In this disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular or a plural expression.

[0067] In the embodiments of this disclosure, "multiple" can be two or more.

[0068] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0069] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "A in one case, B in another", etc., may include the following technical methods depending on the situation: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, both A and B are executed. The same applies when there are more branches such as A, B, C, etc.

[0070] In some embodiments, the notation "A or B" may include the following technical approaches, depending on the circumstances: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, selective execution from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0071] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, value, or content of the descriptive objects. The description of the descriptive objects should be found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the value of the descriptive object is not limited by ordinal numbers and can be one or more. For example, in "first device," the value of "device" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0072] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0073] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “when…”, “when…”, “if…”, etc. can be used interchangeably.

[0074] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0075] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “graph node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0076] This disclosure provides a wireless charging method, executed by a wireless charging transmitter, such as... Figure 1 As shown, the specific implementation steps of the wireless charging method include:

[0077] Step 101: The wireless charging transmitter pairs with the first wireless charging receiver to obtain the first pairing magnetic field data sensed by the wireless charging transmitter and the type information of the first wireless charging receiver;

[0078] Step 102: Determine the reference pairing magnetic field data corresponding to the first wireless charging receiver based on the type information;

[0079] Step 103: Determine whether to charge the first wireless charging receiver based on the first paired magnetic field data and the reference paired magnetic field data.

[0080] A wireless charging transmitter can include a device that transmits energy to a wireless charging receiver. It typically includes components such as a transmitting coil and control circuitry to generate a wireless charging magnetic field. For example, a wireless charging transmitter can include a wireless charging dock, a wireless charging pad, or a car wireless charger.

[0081] A wireless charging receiver is a device capable of receiving energy from a wireless charging transmitter. It typically includes components such as a receiving coil and a rectifier circuit to receive the wireless charging magnetic field and convert it into electrical energy. For example, wireless charging receivers can include devices with built-in wireless charging modules, such as smartphones, smartwatches, and tablets.

[0082] Pairing a wireless charging receiver with a wireless charging transmitter can involve establishing a physical or logical connection between them in preparation for wireless power transfer. Pairing can include physical alignment or magnetic attraction, or it can involve communication and identification between the devices. Pairing can be done by the user manually placing the wireless charging receiver on the wireless charging transmitter, or by the wireless charging receiver and transmitter magnetically attaching to each other. For example, pairing can involve the user placing their phone on a wireless charging pad; at this point, a pairing relationship is established between the phone and the charging pad, but charging has not yet begun.

[0083] In one possible implementation, the wireless charging transmitter can acquire first pairing magnetic field data and type information of the first wireless charging receiver before charging the first wireless charging receiver.

[0084] The first pairing magnetic field data can be magnetic field characteristic data sensed by the magnetic field sensor inside the wireless charging transmitter after the wireless charging transmitter and the first wireless charging receiver have completed pairing. This data reflects the magnetic field distribution around the wireless charging transmitter under a specific pairing state.

[0085] In one possible implementation, the magnetic field data may include magnetic field strength and / or magnetic field distribution, etc. It is understood that reference magnetic field data may also include magnetic field strength and / or magnetic field distribution, etc.

[0086] In one possible implementation, the magnetic field sensor may include a multi-axis magnetometer, such as a 3-axis magnetometer, for detecting the magnetic field strength in multiple directions (such as 3-axis directions) when the wireless charging receiver and wireless charging transmitter are paired.

[0087] In one possible implementation, multiple magnetic field sensors may be included. For example, multiple magnetic field sensors may be evenly distributed around the transmitting coil of the wireless charging transmitter.

[0088] Type information may include information used to identify or classify wireless charging transmitters. Type information may include the brand, model, power rating, charging protocol type, and identifiers of the wireless charging transmitter, used to distinguish the characteristics of different wireless charging transmitters.

[0089] In one possible implementation, the wireless charging transmitter can receive type information sent by the wireless charging receiver during the handshake process. For example, the wireless charging receiver can modulate the type information onto an energy carrier and send it to the wireless charging transmitter. For instance, the wireless charging transmitter can use high-frequency AC to drive the TX coil, generating a stable alternating magnetic field (energy carrier). The receiving coil of the wireless charging device induces a voltage, and simultaneously, a switch rapidly changes the equivalent load of the coil. When the load changes, the energy absorbed from the magnetic field changes, causing small fluctuations in the current / voltage of the TX coil. The wireless charging transmitter detects these fluctuations, demodulates them into a 0 / 1 bit stream, and completes the reception.

[0090] The reference paired magnetic field data can be pre-established benchmark data of magnetic field characteristics corresponding to a specific type of wireless charging transmitter under ideal or normal charging conditions. This data is used to compare with real-time sensed magnetic field data to assess any anomalies in the current charging environment.

[0091] In one possible implementation, the reference pairing magnetic field data can be pre-stored in the wireless charging transmitter. For example, the wireless charging transmitter can store reference pairing magnetic field data corresponding to different types of wireless charging receivers.

[0092] In one possible implementation, the reference pairing magnetic field data could be detected when the wireless charging transmitter pairs with different types of wireless charging receivers.

[0093] For example, a wireless charging transmitter can be paired with different types of wireless charging receivers during the production stage, and can sense the reference magnetic field data of different wireless charging receivers through its own magnetic field sensor.

[0094] Here, the reference pairing magnetic field data can be the magnetic field data detected by the wireless charging transmitter and different types of wireless charging receivers under ideal conditions when paired. Ideal conditions may include at least one of the following: there are no foreign objects between the wireless charging receiver and the wireless charging transmitter; the coil of the wireless charging receiver and the coil of the wireless charging transmitter are in the optimal sensing position.

[0095] After pairing, the wireless charging transmitter and the first wireless charging receiver can acquire the first paired magnetic field data it senses. This first paired magnetic field data reflects the magnetic field environment in the current paired state. The wireless charging transmitter can have one or more built-in magnetic field sensors, such as a 3-axis magnetometer. After successful pairing, the magnetic field sensor can perform one or more magnetic field strength measurements and use the results as the first paired magnetic field data. For example, it can simply record the sensor's instantaneous reading at a certain moment. Alternatively, the magnetic field sensor can continuously sample magnetic field data over a period of time to determine the first paired magnetic field data.

[0096] The wireless charging transmitter can also obtain the type information of the first wireless charging receiver. This type information can be used to identify the specific attributes of the first wireless charging receiver. For example, during pairing, the first wireless charging receiver can send its own type identifier to the wireless charging transmitter via a preset communication protocol. The wireless charging transmitter receives and parses the identifier to obtain the type information.

[0097] After obtaining the type information of the first wireless charging receiver, the wireless charging transmitter determines the corresponding reference pairing magnetic field data for the first wireless charging receiver based on the type information. The reference pairing magnetic field data is baseline data specific to a particular type of receiver. For example, the wireless charging transmitter can internally store a simple lookup table that associates different wireless charging receiver type information with preset reference magnetic field data in a one-to-one manner. When the type information of the first wireless charging receiver is received, the wireless charging transmitter directly retrieves the corresponding reference pairing magnetic field data by looking up the table.

[0098] The wireless charging transmitter can determine whether to charge the first wireless charging receiver based on the acquired first pairing magnetic field data and the determined reference pairing magnetic field data. For example, the wireless charging transmitter can simply compare whether the first pairing magnetic field data and the reference pairing magnetic field data are completely identical. If they are completely identical, it determines to charge; otherwise, it determines not to charge.

[0099] In one possible implementation, the wireless charging transmitter can calculate a certain difference between two magnetic field data points and compare it with a preset fixed value. If the difference is less than the fixed value, charging is initiated; if the difference is greater than or equal to the fixed value, charging is not initiated.

[0100] In this way, by acquiring and comparing real-time magnetic field data with reference magnetic field data, potential anomalies in the charging environment can be directly and effectively identified. This reduces the inherent delay of traditional detection mechanisms, enabling early warning of foreign objects or abnormal environments, thereby improving the sensitivity and accuracy of detection.

[0101] In some embodiments, determining whether to charge based on the first paired magnetic field data and the reference paired magnetic field data includes at least one of the following:

[0102] In response to a first difference between the first paired magnetic field data and the reference paired magnetic field data exceeding a first threshold range, it is determined that charging will not be performed.

[0103] In response to the first difference not exceeding the first threshold range, it is determined to charge.

[0104] Here, the first difference is used to quantify the degree of deviation between the first paired magnetic field data actually sensed by the wireless charging transmitter and the reference paired magnetic field data expected for the current type of wireless charging receiver. The first paired magnetic field data and the reference paired magnetic field data can be at least one of the following: the mean vector of the magnetic field strength, the standard deviation vector of the field strength, the composite total field strength, the magnetic field direction angle, or the field strength axis ratio.

[0105] In one possible implementation, when the first paired magnetic field data and the reference paired magnetic field data are scalars, the first difference can be expressed as the absolute difference or the relative difference between the two. When the first paired magnetic field data and the reference paired magnetic field data are vectors, the first difference can be expressed as the Euclidean distance, the angle difference, or the difference in a specific component between the two vectors. By calculating the difference, the degree of deviation between the actual magnetic field environment and the ideal magnetic field environment can be intuitively reflected.

[0106] The first threshold range is a preset standard used to determine whether the first difference is within an acceptable range. The first threshold range can be an upper limit, indicating that the first difference should not exceed this value. It can also be an interval, indicating that the first difference should fall within this interval. The threshold range can be set based on extensive experimental data, system design specifications, and safety standards, aiming to distinguish between magnetic field fluctuations under normal operating conditions and magnetic field changes caused by abnormal conditions (such as foreign objects, severe misalignment, etc.). When the first difference exceeds this range, the magnetic field environment is considered abnormal.

[0107] When the first difference exceeds the first threshold range, the wireless charging transmitter can determine that the actual magnetic field environment differs significantly from the expected one. This could be due to factors such as the presence of foreign objects, a mismatch in the wireless charging receiver type, a severely deviated position of the wireless charging receiver, or interference with the magnetic field. In this case, to reduce potential safety risks (such as overheating or device damage) or ineffective charging, the wireless charging transmitter can actively prevent the charging process from starting or continuing.

[0108] When the first difference does not exceed the first threshold range, the wireless charging transmitter can determine that the actually sensed magnetic field characteristics are highly consistent with the reference magnetic field characteristics, and the charging environment is within a normal and safe range. At this time, the wireless charging transmitter can safely start or maintain the charging process for the first wireless charging receiver, enabling efficient energy transfer.

[0109] By using a first difference and a first threshold range, a quantification mechanism is provided to evaluate the consistency between the first paired magnetic field data and the reference paired magnetic field data. This enables the wireless charging transmitter to more accurately determine charging conditions and reduces potential safety hazards.

[0110] In some embodiments, the first difference includes the three-dimensional Euclidean distance between the first paired magnetic field data and the reference paired magnetic field data.

[0111] Three-dimensional Euclidean distance is a metric for measuring the straight-line distance between two points in three-dimensional space. When both the first paired magnetic field data and the reference paired magnetic field data can be represented as three-dimensional vectors, for example, each magnetic field data contains magnetic field components in the X, Y, and Z directions, the difference between the first paired magnetic field data and the reference paired magnetic field data can be quantified by calculating the Euclidean distance between these two three-dimensional vectors in three-dimensional space.

[0112] For example, if the first paired magnetic field data is represented as a three-dimensional vector (Bx_c, By_c, Bz_c) and the reference paired magnetic field data is represented as a three-dimensional vector (Bx_r, By_r, Bz_r), then the three-dimensional Euclidean distance ΔB between the first paired magnetic field data and the reference paired magnetic field data can be expressed by expression (1):

[0113] ΔB= (1)

[0114] Expression (1) can comprehensively consider the changes in the magnetic field in all three dimensions, reflecting the overall deviation of the magnetic field data.

[0115] By employing the three-dimensional Euclidean distance between the first paired magnetic field data and the reference paired magnetic field data, the quantification of the difference between the two data becomes more precise and objective. The wireless charging transmitter can more accurately determine whether there are foreign objects in the magnetic field or whether the first wireless charging receiver is in a suitable charging position, enabling the charging process to be initiated under safe and efficient conditions, effectively improving the safety performance and user experience of the wireless charging system.

[0116] In some embodiments, acquiring the first pairing magnetic field data sensed by the wireless charging transmitter includes:

[0117] Obtain the raw magnetic field data determined by the magnetometer of the wireless charging transmitter at least once;

[0118] The first paired magnetic field data is determined based on the statistical values ​​of at least one original magnetic field data.

[0119] The magnetometer integrated into the wireless charging transmitter is used to measure the strength and direction of the magnetic field around it. When the wireless charging transmitter is paired with a first wireless charging receiver, the magnetometer can perform at least one measurement to obtain a series of raw magnetic field data. For example, the magnetometer can continuously collect magnetic field data over a period of time at a preset sampling frequency, such as 20 times per second, thereby obtaining multiple raw magnetic field data points.

[0120] To improve the accuracy and stability of the first paired magnetic field data, statistical processing of these raw magnetic field data can be performed.

[0121] Statistical values ​​can be obtained by calculating the arithmetic mean, median, or weighted average of the original magnetic field data. For example, calculating the average of multiple measurements can effectively smooth out instantaneous fluctuations and random noise; calculating the median can effectively resist the interference of outliers.

[0122] Statistical processing can extract more representative and stable magnetic field characteristics from the raw measurement data containing noise, thus forming reliable first-pair magnetic field data. This makes the acquired first-pair magnetic field data more stable and accurate, providing a more reliable basis for determining whether to charge the first wireless charging receiver based on the first-pair magnetic field data and reference paired magnetic field data. This improves the accuracy and robustness of charging decisions and reduces misjudgments caused by inaccurate magnetic field data.

[0123] In some embodiments, the method further includes:

[0124] Determine the ambient temperature information when the wireless charging transmitter is paired with the first wireless charging receiver;

[0125] Based on the ambient temperature information, the first paired magnetic field data is compensated;

[0126] The step of determining whether to charge the first wireless charging receiver based on the first paired magnetic field data and the reference paired magnetic field data includes:

[0127] Based on the first paired magnetic field data obtained through the compensation and the reference paired magnetic field data, it is determined whether to charge the first wireless charging receiver.

[0128] During the pairing process between the wireless charging transmitter and the first wireless charging receiver, the wireless charging transmitter acquires the current ambient temperature information. This ambient temperature information can be obtained in real-time by a temperature sensor integrated inside the wireless charging transmitter, or it can be provided by an external temperature sensor that communicates with the wireless charging transmitter.

[0129] In one possible implementation, the first wireless charging receiver can also send its own temperature information to the wireless charging transmitter during the pairing process as a reference for the ambient temperature information.

[0130] The wireless charging transmitter can use ambient temperature information to correct previously sensed first-pair magnetic field data. The compensation process eliminates or reduces the impact of temperature variations on the measured magnetic field data. For example, a temperature compensation model or lookup table can be pre-established, indicating the deviation of the magnetic field data from a standard temperature (e.g., the temperature at which the paired magnetic field data was acquired) at different temperatures. The wireless charging transmitter inputs the current ambient temperature information into the model, calculates the corresponding compensation value or coefficient, and applies it to the first-pair magnetic field data.

[0131] In one possible implementation, the compensation method may include, but is not limited to, additive compensation, multiplicative compensation, or more complex nonlinear function compensation, to obtain temperature-corrected first paired magnetic field data.

[0132] In one possible implementation, the magnetic field data can be compensated based on the temperature difference between the current ambient temperature and the ambient temperature at which the reference paired magnetic field data was determined. This allows the compensated first paired magnetic field data to be compared with the reference paired magnetic field data under similar temperature conditions, improving the accuracy of magnetic field environment assessment.

[0133] Thus, ambient temperature information is introduced to compensate for the first paired magnetic field data. This corrects for the impact of ambient temperature changes on the magnetic field measurement data, allowing the compensated first paired magnetic field data to more accurately reflect the true magnetic field characteristics of the first wireless charging receiver. During the charging decision process, the wireless charging transmitter can compare the more accurate magnetic field data with the reference paired magnetic field data, thereby significantly improving the accuracy of pairing identification and the reliability of charging decisions.

[0134] In some embodiments, obtaining the type information of the first wireless charging receiver includes:

[0135] During the authentication process between the wireless charging transmitter and the first wireless charging receiver, the type information of the first wireless charging receiver is obtained.

[0136] The authentication process can be a process of identity verification and security negotiation between the wireless charging transmitter and the first wireless charging receiver. The authentication process may include steps such as device handshake, certificate exchange, and key negotiation, ensuring that only authorized devices can communicate and charge.

[0137] In one possible implementation, the authentication process may include a Qi-based authentication process. Type information may be used to indicate the wireless charging receiver identifier in the X.509 device certificate, whereby the wireless charging receiver identifier indicates the type of wireless charging receiver. Here, the X.509 device certificate may be a certificate exchanged between the wireless charging transmitter and the first wireless charging receiver during the authentication process, and the X.509 device certificate may be used to uniquely identify and verify the wireless charging receiver and / or the first wireless charging receiver.

[0138] For example, the wireless charging transmitter can establish a connection with the wireless charging receiver via the Qi 1.3 / 2.0 protocol and initiate an authentication request. The wireless charging receiver returns its X.509 device certificate. After verifying the validity of the certificate, the wireless charging transmitter parses it to obtain the identifier (RX_ID) of the wireless charging receiver. Then, based on the identifier of the wireless charging receiver, it determines the corresponding reference pairing magnetic field data.

[0139] Since authentication is a necessary step before wireless charging can begin, merging the type information acquisition process with the authentication process reduces additional communication round trips and time delays, thereby simplifying the pairing process, shortening the time required from device connection to charging readiness, and improving the overall efficiency and user experience of the wireless charging system.

[0140] In some embodiments, the wireless charging transmitter pre-stores reference pairing magnetic field data corresponding to different types of information;

[0141] The reference pairing magnetic field data corresponding to the different types of information are sensed by the wireless charging transmitter when it is paired with different types of wireless charging receivers.

[0142] Pre-storage may include storing pre-collected or calculated reference pairing magnetic field data in the internal storage unit of the wireless charging transmitter before it is put into use. The storage unit may be a non-volatile memory, such as flash memory or EEPROM.

[0143] Pre-stored reference pairing magnetic field data can be organized in the form of a lookup table, database, or structured file. Each entry is associated with a specific receiver type and the corresponding reference pairing magnetic field data. When the first wireless charging receiver pairs with the wireless charging transmitter, the wireless charging transmitter can accurately retrieve the reference data that matches the current receiver type, providing a reliable basis for charging decisions.

[0144] During the development, testing, or calibration phases of wireless charging transmitters, manufacturers can perform actual pairing operations between the transmitters and various known types of wireless charging receivers. During each pairing process, the transmitter senses and records the magnetic field data using its internal sensors, such as a magnetometer. This raw magnetic field data, after necessary processing (e.g., averaging multiple measurements, filtering, etc.), is stored as reference pairing magnetic field data for a specific type of receiver. This process can be performed on the production line or during the initial device configuration, ensuring that the stored reference data is based on actual physical interaction, possessing higher accuracy and representativeness, and truly reflecting the magnetic field characteristics of different types of receivers in the paired state.

[0145] Since the reference pairing magnetic field data is obtained based on actual physical interaction, it can more realistically reflect the magnetic field characteristics of different types of receivers in the pairing state. This enables the wireless charging transmitter to more reliably and accurately determine whether the first wireless charging receiver is suitable for charging during the charging decision process, effectively reducing misjudgments caused by inaccurate reference data and improving the safety and user experience of the wireless charging system.

[0146] Several specific examples are provided in conjunction with the above embodiments.

[0147] This example proposes a foreign object detection system and method for wireless charging transmitters based on a magnetic field fingerprint database. The core of this system involves establishing a magnetic field fingerprint (referencing paired magnetic field data) for each certified wireless charging receiver (such as a charging dock) in an ideal state free of foreign objects during the development and production phase. These fingerprints are then bound and stored with the receiver's unique ID (obtained via a Qi protocol certificate). During actual charging, the wireless charging transmitter uses a magnetometer sensor to collect magnetic field data in real time and compares it with the ideal fingerprint corresponding to the current wireless charging receiver. The presence of a foreign object is determined by calculating the magnetic field deviation. This solution requires no mechanical displacement, enables real-time detection, and can identify pre-existing foreign objects.

[0148] A schematic diagram of the structure of the wireless charging transmitter and the wireless charging receiver is shown below. Figure 2 As shown, where,

[0149] Wireless charging transmitters can include charging docks, desktop chargers, car charging pads, etc., that conform to the Qi 1.2~Qi 2.2 protocols. Wireless charging transmitters can be magnetic or non-magnetic.

[0150] Wireless charging receivers can include smartphones, watches, earphones, etc. They can be magnetic or non-magnetic.

[0151] The wireless charging transmitter may include:

[0152] The magnetic field acquisition unit can consist of an array of magnetic sensors. It may include one or more triaxial magnetometers to determine paired magnetic field data.

[0153] The control unit is used for: obtaining the identity of the wireless charging receiver (based on Qi certificate), processing magnetic field data (filtering / feature extraction); deviation calculation (three-dimensional vector comparison); and foreign object detection (threshold decision).

[0154] The memory is used to store the magnetic field fingerprint database. The fingerprint database can be in the following format: RX_ID1 -> F1, RX_ID2 -> F2, RX_ID3 -> F3; where RX_ID1, RX_ID2, and RX_ID3 represent three different types of information, and F1, F2, and F3 represent the magnetic field fingerprint databases corresponding to different types of information.

[0155] The wireless charging power unit includes a transmitter drive circuit and a transmitter coil, which are used to generate charging energy waves.

[0156] The alarm unit includes at least one of the following: LED indicator, buzzer, and communication module (Bluetooth / Wi-Fi push) to indicate the foreign object status (whether there is a foreign object or not) to the user in different ways.

[0157] The wireless charging receiver may include:

[0158] Security chip (storage chip) is used to store type information, such as storage X.509 device certificates (which contain manufacturer codes, product models, and unique serial numbers).

[0159] The wireless charging receiver unit includes a receiver rectifier circuit and a receiver coil for receiving charging energy waves.

[0160] The wireless charging receiver can be equipped with a built-in magnet to achieve magnetic attraction.

[0161] Solution Implementation Description:

[0162] Phase 1: Establishment of the magnetic field fingerprint database (development and production phase)

[0163] Step P1: Obtain wireless charging receiver samples, collecting all mainstream and certified wireless charging receivers on the market (mobile phones, watches, headphones, etc.).

[0164] Step P2: Establish a foreign object-free testing environment. Set up a testing environment in the laboratory free of metallic foreign objects and ensure that there are no ferromagnetic interference objects in the surrounding area.

[0165] Step P3: Collect ideal magnetic field fingerprint. Place the wireless charging receiver on the wireless charging transmitter. After stabilization, collect magnetic field data through the magnetometer sensor.

[0166] Step P4: Obtain the wireless charging receiver ID, perform authentication interaction with the wireless charging receiver through the Qi 1.3 / 2.0 protocol, and obtain its X.509 device certificate form.

[0167] Step P5: Link and store the data. Bind the RX_ID with the corresponding magnetic field fingerprint F and store it in the memory of the TX base.

[0168] Phase Two: Real-time Phase Detection (User Usage Phase). For example... Figure 3 As shown, it specifically includes:

[0169] Step 301: Device Access and Identification. The user places the wireless charging receiver on the wireless charging transmitter. The wireless charging transmitter establishes a connection with the wireless charging receiver via the Qi 1.3 / 2.0 protocol and initiates an authentication request. The wireless charging receiver returns its X.509 device certificate. After verifying the validity of the certificate, the wireless charging transmitter parses it to obtain the RX_ID, thus obtaining the unique identifier RX_ID_current of the current wireless charging receiver.

[0170] Step S302: Reference fingerprint retrieval. The wireless charging transmitter uses RX_ID_current as an index to query the corresponding ideal reference fingerprint F_ref in the local magnetic field fingerprint database, and finds the ideal reference magnetic field fingerprint F_ref (three-dimensional vector) corresponding to this RX_ID_current.

[0171] Step S303: Real-time magnetic field data acquisition. The wireless charging transmitter acquires the current magnetic field data through a magnetometer sensor (a single three-axis magnetometer sensor or an array of multiple magnetometer sensors); it continuously samples 20 times (sampling rate 100Hz), removes outliers and takes the average, and simultaneously acquires the ambient temperature, performing temperature compensation if necessary; after this processing, the real-time magnetic field fingerprint data F_current (three-dimensional vector) is obtained.

[0172] Step S304: Calculation of magnetic field data deviation. Calculate the deviation ΔB between F_current and F_ref. The formula for calculating the deviation (three-dimensional Euclidean distance) is shown in expression (1). This yields the magnetic field deviation value ΔB (scalar).

[0173] Step S305: Foreign Object Detection and Decision. Compare ΔB with the preset detection threshold Th:

[0174] If ΔB > Th → it is determined that there is a foreign object, and step S306 is executed;

[0175] If ΔB ≤ Th → it is determined that there is no foreign object, and charging can begin normally;

[0176] The threshold Th can be dynamically adjusted according to the type of wireless charging receiver (such as magnetic devices, which can be set to a lower threshold). This step can detect "pre-existing foreign objects" (because the deviation is found on the first comparison), and output the foreign object detection result through this step.

[0177] Step S306: Alarm and Protection. Upon receiving the execution command from step S305, the wireless charging transmitter immediately stops power output to ensure safety; a visual alarm is issued via LED indicator (e.g., flashing red light), or an audible alert is issued via buzzer; if the wireless charging transmitter is equipped with a communication module, alarm information and foreign object location indication are pushed to the user's mobile APP; after the foreign object is removed, it automatically resets or waits for the user to restart.

[0178] By introducing a pre-established and comprehensive benchmark magnetic field fingerprint database, a revolutionary approach to detection has been achieved, resulting in a comprehensive improvement:

[0179] Compared to Q-value detection: This solution achieves real-time continuous detection, eliminates blind spots, and is simpler. Q-value detection can only be performed before charging begins and cannot detect foreign object intrusion during charging. This solution uses static magnetic field fingerprint comparison, which can continuously monitor throughout the charging process. When a foreign object enters the system during charging (such as when a user accidentally drops a coin on the charger), the system can immediately detect the magnetic field distortion and stop charging. Q-value detection requires complex excitation circuits, peak detection circuits, and multi-stage switching circuits. This solution only requires a consumer-grade magnetometer sensor, resulting in a simpler circuit.

[0180] No mechanical displacement is required, resulting in high detection efficiency. This solution employs static detection, eliminating the need for any moving parts. It can complete magnetic field acquisition and comparison within milliseconds, significantly improving detection efficiency.

[0181] This system enables personalized foreign object detection based on the wireless charging receiver ID. By pre-storing the ideal magnetic field fingerprint of each wireless charging receiver at the wireless charging transmitter and binding it to the device ID, the transmitter can identify which device is being placed and compare it with the corresponding benchmark data. This fundamentally solves the detection error caused by the differences in the magnetic field characteristics of different devices.

[0182] This solution addresses the detection blind spot caused by pre-existing foreign objects. If a foreign object is already attached to the wireless charging receiver or placed on the surface of the wireless charging transmitter before charging begins, traditional Q-value detection and power loss methods may mistakenly interpret the initial state with the foreign object as normal, leading to missed detection. This solution, through an initial absolute comparison (comparing the real-time magnetic field with a pre-stored ideal fingerprint), can directly detect the deviation between the initial state and the ideal state, identifying the foreign object before charging begins.

[0183] Scalable foreign object location capability. If the wireless charging transmitter uses a magnetometer sensor matrix configuration, it can not only detect the presence of foreign objects, but also pinpoint the specific area where the foreign object is located by analyzing the magnetic field distortion patterns of each sensor point (e.g., which corner of a desktop charger has a coin). This provides convenience for users to quickly remove foreign objects.

[0184] This disclosure provides a wireless charging device disposed at a wireless charging transmitter. The device includes a processing module, which is used for:

[0185] The wireless charging transmitter is paired with the first wireless charging receiver to obtain the first pairing magnetic field data sensed by the wireless charging transmitter and the type information of the first wireless charging receiver.

[0186] Based on the type information, determine the reference pairing magnetic field data corresponding to the first wireless charging receiver;

[0187] Based on the first paired magnetic field data and the reference paired magnetic field data, determine whether to charge the first wireless charging receiver.

[0188] In some embodiments, the processing module is specifically used for at least one of the following:

[0189] In response to a first difference between the first paired magnetic field data and the reference paired magnetic field data exceeding a first threshold range, it is determined that charging will not be performed.

[0190] In response to the first difference not exceeding the first threshold range, it is determined to charge.

[0191] In some embodiments, the first difference includes the three-dimensional Euclidean distance between the first paired magnetic field data and the reference paired magnetic field data.

[0192] In some embodiments, the processing module is specifically used for:

[0193] Obtain the raw magnetic field data determined by the magnetometer of the wireless charging transmitter at least once;

[0194] The first paired magnetic field data is determined based on the statistical values ​​of at least one original magnetic field data.

[0195] In some embodiments, the processing module is further configured to:

[0196] Determine the ambient temperature information when the wireless charging transmitter is paired with the first wireless charging receiver;

[0197] Based on the ambient temperature information, the first paired magnetic field data is compensated;

[0198] The processing module is specifically used for:

[0199] Based on the first paired magnetic field data obtained through the compensation and the reference paired magnetic field data, it is determined whether to charge the first wireless charging receiver.

[0200] In some embodiments, the processing module is specifically used for:

[0201] During the authentication process between the wireless charging transmitter and the first wireless charging receiver, the type information of the first wireless charging receiver is obtained.

[0202] In some embodiments, the wireless charging transmitter pre-stores reference pairing magnetic field data corresponding to different types of information;

[0203] The reference pairing magnetic field data corresponding to the different types of information are sensed by the wireless charging transmitter when it is paired with different types of wireless charging receivers.

[0204] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), and the functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD), such as a field-programmable gate array (FPGA), which can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0205] In this disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a type of microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), a Deep Learning Processing Unit (DPU), etc.

[0206] Figure 4 This is a schematic diagram of the structure of the electronic device 9100 provided in this embodiment. The electronic device 9100 can be a computer terminal, a server, a chip, chip system, or processor that supports any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above information transmission methods. The electronic device 9100 can be used to implement the wireless charging method described in the above method embodiments; please refer to the description in the above method embodiments for details.

[0207] like Figure 4 As shown, the electronic device 9100 includes one or more processors 9101. The processor 9101 can be a general-purpose processor or a dedicated processor, etc. The processor 9101 is used to invoke instructions to cause the electronic device 9100 to execute any of the above wireless charging methods.

[0208] In some embodiments, the electronic device 9100 further includes one or more memories 9102 for storing instructions. Optionally, all or part of the memories 9102 may also be located outside the electronic device 9100.

[0209] In some embodiments, the electronic device 9100 further includes one or more transceivers 9103. When the electronic device 9100 includes one or more transceivers 9103, the steps of sending, receiving and / or acquiring in the above method are performed by the transceivers 9103, and the other steps are performed by the processor 9101.

[0210] In some embodiments, the acquisition steps in the above method can also be executed by the processor 9101, for example, acquiring information from the memory 9102.

[0211] Optionally, the electronic device 9100 further includes one or more interface circuits 9104 connected to the memory 9102. The interface circuits 9104 can be used to receive signals from the memory 9102 or other devices, and can be used to send signals to the memory 9102 or other devices. For example, the interface circuits 9104 can read instructions stored in the memory 9102 and send the instructions to the processor 9101.

[0212] The electronic device 9100 described in the above embodiments may be a network device or a terminal, but the scope of the electronic device 9100 described in this disclosure is not limited thereto, and the structure of the electronic device 9100 may vary. Figure 4 There are limitations. Electronic devices can be standalone devices or part of a larger device.

[0213] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program commands. The aforementioned program can be stored in a storage medium, including various media capable of storing program code such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks or optical disks.

[0214] Alternatively, if the integrated units described above are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical approach of the embodiments of this application, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several commands to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

[0215] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of the present invention and do not limit the scope of protection of this patent.

Claims

1. A wireless charging method, characterized in that, Performed by a wireless charging transmitter, the method includes: The wireless charging transmitter is paired with the first wireless charging receiver to obtain the first pairing magnetic field data sensed by the wireless charging transmitter and the type information of the first wireless charging receiver. Based on the type information, determine the reference pairing magnetic field data corresponding to the first wireless charging receiver; Based on the first paired magnetic field data and the reference paired magnetic field data, determine whether to charge the first wireless charging receiver.

2. The wireless charging method according to claim 1, characterized in that, The step of determining whether to charge based on the first paired magnetic field data and the reference paired magnetic field data includes at least one of the following: In response to a first difference between the first paired magnetic field data and the reference paired magnetic field data exceeding a first threshold range, it is determined that charging will not be performed. In response to the first difference not exceeding the first threshold range, it is determined to charge.

3. The wireless charging method according to claim 2, characterized in that, The first difference includes the three-dimensional Euclidean distance between the first paired magnetic field data and the reference paired magnetic field data.

4. The wireless charging method according to claim 1, characterized in that, The step of acquiring the first pairing magnetic field data sensed by the wireless charging transmitter includes: Obtain the raw magnetic field data determined by the magnetometer of the wireless charging transmitter at least once; The first paired magnetic field data is determined based on the statistical values ​​of at least one original magnetic field data.

5. The wireless charging method according to claim 4, characterized in that, The method further includes: Determine the ambient temperature information when the wireless charging transmitter is paired with the first wireless charging receiver; Based on the ambient temperature information, the first paired magnetic field data is compensated; The step of determining whether to charge the first wireless charging receiver based on the first paired magnetic field data and the reference paired magnetic field data includes: Based on the first paired magnetic field data obtained through the compensation and the reference paired magnetic field data, it is determined whether to charge the first wireless charging receiver.

6. The wireless charging method according to claim 1, characterized in that, The step of obtaining the type information of the first wireless charging receiver includes: During the authentication process between the wireless charging transmitter and the first wireless charging receiver, the type information of the first wireless charging receiver is obtained.

7. The wireless charging method according to any one of claims 1 to 6, characterized in that, The wireless charging transmitter has pre-stored reference pairing magnetic field data corresponding to different types of information. The reference pairing magnetic field data corresponding to the different types of information are sensed by the wireless charging transmitter when it is paired with different types of wireless charging receivers.

8. A wireless charging device, characterized in that, The device, located at a wireless charging transmitter, includes a processing module, which is used for: The wireless charging transmitter is paired with the first wireless charging receiver to obtain the first pairing magnetic field data sensed by the wireless charging transmitter and the type information of the first wireless charging receiver. Based on the type information, determine the reference pairing magnetic field data corresponding to the first wireless charging receiver; Based on the first paired magnetic field data and the reference paired magnetic field data, determine whether to charge the first wireless charging receiver.

9. An electronic device, characterized in that, The electronic device includes: One or more processors; The processor is used to invoke instructions to cause the electronic device to perform the wireless charging method according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores instructions that, when executed on an electronic device, cause the electronic device to perform the wireless charging method according to any one of claims 1 to 7.

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