Multi-wireless charging device collaborative charging method

Abstract

This invention discloses a method for coordinated charging of multiple wireless charging devices, relating to the field of wireless charging technology. The method includes: when an electronic device to be charged enters the charging range of a wireless charging device, the charging magnetic field of the nearest first wireless charging device is not adjusted; the third to Nth wireless charging devices are put into standby mode; the charging magnetic field control parameters of the second wireless charging device are adjusted using the charging magnetic field of the first wireless charging device as a reference magnetic field; after reducing interference with the charging magnetic field of the first wireless charging device, the adjustment of the second wireless charging device is considered complete; then, using the charging magnetic fields of the first and second wireless charging devices as reference magnetic fields, the charging magnetic field control parameters of the third wireless charging device are adjusted, until the adjustment of the charging magnetic field control parameters of the Nth wireless charging device is completed. This method solves the technical problem in the prior art where independent conflict in the working sequence of wireless charging devices leads to reduced charging efficiency.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and more specifically to a method for collaborative charging of multiple wireless charging devices. Background Technology

[0002] Currently, most home wireless charging systems arrange all wireless charging devices around the main activity area of ​​the room. When an electronic device enters this area, each device can autonomously orient itself to create a charging magnetic field pointing towards it. This makes multiple devices susceptible to interference from other devices, leading to decreased charging efficiency. Furthermore, each device operates independently, relying on its own local clock generated by a crystal oscillator. However, the heat generated when the charging magnetic field is created can cause the local clocks of each device to drift under high temperatures, potentially resulting in undetected interference from the magnetic field. Summary of the Invention

[0003] This application provides a method for collaborative charging of multiple wireless charging devices, which addresses the technical problem in the prior art where the working timing of wireless charging devices is independent of each other and is easily affected by other charging devices, leading to a decrease in charging efficiency.

[0004] In view of the above problems, this application provides a method for collaborative charging of multiple wireless charging devices.

[0005] The first aspect of this application provides a method for collaborative charging of multiple wireless charging devices, the method comprising: Step 1: When an electronic device enters a preset charging range of N wireless charging devices, the N wireless charging devices respectively upload N location information of the electronic device to a central control unit, wherein the total number of wireless charging devices is ≥ N≥1; Step 2: When the central control unit receives the N location information of the electronic device, based on the N location information of the electronic device, the N wireless charging devices are sorted in ascending order of distance from the electronic device to obtain the first wireless charging device up to the Nth wireless charging device; Step 3: The central control unit controls the third wireless charging device. Until the Nth wireless charging device issues a standby command; Step 4: From the first wireless charging device to the Nth wireless charging device, extract the kth wireless charging device, and send a magnetic field adjustment command to the kth wireless charging device through the central control unit, where the initial value of k is equal to 2; Step 5: After receiving the magnetic field adjustment command, the kth wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference to the existing charging magnetic field. When the charging magnetic field control parameter adjustment of the kth wireless charging device is completed and started, it returns a charging magnetic field adjustment completion signal to the central control unit. If k≥N, the process stops; if k<N, after updating the value of k by k+1, return to step 4 to execute the loop.

[0006] A second aspect of this application provides a wireless charging system, wherein the system includes a central control unit and a plurality of wireless charging devices, and the system is used to implement any one of the steps of the first aspect.

[0007] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0008] This application adjusts the charging magnetic field of the nearest wireless charging device (first wireless charging device) without adjusting it at the beginning. The third to Nth wireless charging devices are then left in standby mode. Using the charging magnetic field of the first wireless charging device as a reference magnetic field, the control parameters of the charging magnetic field of the second wireless charging device are adjusted. Once the interference with the charging magnetic field of the first wireless charging device is reduced, the adjustment of the second wireless charging device is considered complete. Then, using the charging magnetic fields of the first and second wireless charging devices as reference magnetic fields, the control parameters of the charging magnetic field of the third wireless charging device are adjusted. This process continues until the control parameters of the charging magnetic field of the Nth wireless charging device are adjusted. Because the mutual interference of magnetic fields is considered, the resulting charging magnetic field, compared to the independent operation of traditional wireless charging devices, reduces the conflicting effects of charging magnetic fields, thus achieving the technical effect of improving the charging efficiency of multiple wireless charging devices. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 A schematic flowchart illustrating the collaborative charging method for multiple wireless charging devices provided in this application embodiment;

[0011] Figure 2 This is a flowchart illustrating the process of obtaining the first negative magnetic field coefficient in the multi-wireless charging device collaborative charging method provided in this application embodiment. Detailed Implementation

[0012] This application provides a method for collaborative charging of multiple wireless charging devices, which addresses the technical problem in the prior art where the working timing of wireless charging devices is independent and easily affected by other charging devices, leading to reduced charging efficiency.

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] It should be noted that the terms "comprising" and "having" are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or modules that are not explicitly listed or that are inherent to these processes, methods, products, or devices.

[0015] Example 1, as Figure 1 As shown, this application provides a method for collaborative charging of multiple wireless charging devices, which is applied to a wireless charging system. The system includes a central control unit and multiple wireless charging devices, including:

[0016] Step 1: When the electronic device enters the preset charging range of N wireless charging devices, the N location information of the electronic device is uploaded to the central control unit by the N wireless charging devices respectively, wherein the total number of wireless charging devices is ≥ N≥ 1;

[0017] Step 2: When the central control unit receives the N location information of the electronic device, it sorts the N wireless charging devices in ascending order of their distance from the electronic device based on the N location information of the electronic device, and obtains the first wireless charging device up to the Nth wireless charging device.

[0018] In the embodiments of this application, the central control unit is used to receive information from multiple wireless charging devices and issue corresponding instructions to the multiple wireless charging devices. The multiple wireless charging devices periodically transmit signals. When an electronic device to be charged enters the preset charging range of the corresponding wireless charging device (i.e., a wireless charging range constructed in advance with each wireless charging device as the center and a preset radius), it will respond to these signals and interact with the device to confirm the entry of the electronic device. Optionally, the N wireless charging devices interacting with the device send lasers to the electronic device and measure the time and direction of the reflection to determine the location and distance of the electronic device to the N wireless charging devices, thereby obtaining N location information of the electronic device. The N wireless charging devices configure the charging magnetic field strength and charging frequency according to the N location information of the electronic device, forming charging magnetic fields towards the electronic device. It should be understood that the direction of the charging magnetic field is not constant but changes in real time. The direction of the charging magnetic field pointing towards the electronic device means that the direction with the highest average magnetic field strength always points towards the electronic device, not that the strongest magnetic field direction always points towards the electronic device. Furthermore, the N wireless charging devices upload the obtained N location information of the electronic device to the central control unit. The N wireless charging devices belong to the plurality of wireless charging devices. The total number of wireless charging devices is ≥ N≥ 1. The total number of wireless charging devices is the total number of the plurality of wireless charging devices. That is, each collaborative control is only for a certain number of wireless charging devices to charge a certain electronic device to be charged. This number is at least 1 and at most the total number of wireless charging devices.

[0019] Optionally, when the central control unit receives N location information from the electronic device, it sorts the N wireless charging devices according to the distance in the N location information from smallest to largest, and obtains the wireless charging device sorting result.

[0020] Furthermore, if the wireless charging devices are sorted by the distances among the N location information of the electronic devices in ascending order, then the first wireless charging device up to the Nth wireless charging device is extracted sequentially from the beginning to the end. It can be seen that the distance between the first wireless charging device and the electronic device increases sequentially up to the Nth distance between the Nth wireless charging device and the electronic device; that is, the distance between the first wireless charging device and the electronic device is the closest among the N wireless charging devices, and the distance between the Nth wireless charging device and the electronic device is the farthest among the N wireless charging devices.

[0021] By extracting the application priority of N wireless charging devices from the first wireless charging device to the Nth wireless charging device, it is easier to lay the groundwork for the orderly adjustment of the charging magnetic field in the future.

[0022] Step 3: The central control unit issues standby commands to the third wireless charging device up to the Nth wireless charging device;

[0023] Step 4: Extract the kth wireless charging device from the first wireless charging device to the Nth wireless charging device, and send a magnetic field adjustment command to the kth wireless charging device through the central control unit, where the initial value of k is equal to 2;

[0024] In a preferred embodiment, the central control unit sends a magnetic field adjustment command to the k-th wireless charging device. The initial value of k is equal to 2. That is, the wireless charging device that is second in position among the first wireless charging devices to the N-th wireless charging devices will start to adjust its own charging magnetic field. The k-th wireless charging device belongs to any one of the wireless charging devices from the first wireless charging device to the N-th wireless charging device.

[0025] While the central control unit sends a magnetic field adjustment command to the k-th wireless charging device, or at an earlier time, the central control unit issues a standby command to the third wireless charging device up to the N-th wireless charging device to stop transmitting the charging magnetic field, so as to avoid the third wireless charging device up to the N-th wireless charging device affecting the adjustment of the charging magnetic field of the k-th wireless charging device.

[0026] For the wireless charging device that is closest in the ranking results, there is no need to adjust its charging magnetic field. This is because the closest wireless charging device has the highest charging efficiency for electronic devices. Therefore, other wireless charging devices need to adapt to its electromagnetic field changes, rather than adapting to the magnetic field changes of other wireless charging devices with lower charging efficiency.

[0027] In other words, the third wireless charging device up to the Nth wireless charging device does not participate in the charging magnetic field adjustment of the second wireless charging device. During the charging magnetic field adjustment process of the second wireless charging device, the first wireless charging device is in an active state, continuously generating a charging magnetic field for the electronic device, and the wireless charging of the electronic device is not interrupted. Therefore, from the third wireless charging device until the Nth wireless charging device stops emitting the charging magnetic field, interference with the charging magnetic field adjustment of the second wireless charging device can be avoided without affecting the charging of the electronic device, thus achieving the technical effect of improving the collaborative efficiency of the charging devices.

[0028] Step 5: After receiving the magnetic field adjustment command, the k-th wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field. When the charging magnetic field control parameters of the k-th wireless charging device are adjusted and started, it returns a charging magnetic field adjustment completion signal to the central control unit. If k≥N, the process stops. If k<N, the k value is updated by k+1, and then the process returns to step 4 to execute the loop.

[0029] In the embodiments of this application, after receiving the magnetic field adjustment command, the k-th wireless charging device adjusts the relevant parameters of the charging magnetic field. When k=2, the k-th wireless charging device adjusts its own charging magnetic field through a monitoring phase and an adjustment phase. When k≥3, the k-th wireless charging device ends the standby state and adjusts its own magnetic field through a monitoring phase and an adjustment phase. When the adjustment is completed, it sends a signal to the central control unit that the charging magnetic field adjustment is complete and starts the k-th wireless charging device.

[0030] When k < N, it indicates that none of the wireless charging devices in the sorting result have been adjusted. In this case, the k value is updated by k+1, and the process returns to step four to continue adjusting the charging magnetic field control parameters of the next wireless charging device in the adjustment order, aiming to reduce interference with the existing charging magnetic field. When k ≥ N, it indicates that all the wireless charging devices in the sorting result have been adjusted, and the magnetic field adjustment process stops. This achieves collaborative charging of electronic devices by N wireless charging devices, thus improving the technical effect of improving the collaborative charging efficiency of multiple wireless charging devices.

[0031] Preferably, when N=1, since the initial value of k is greater than N, the process of this application embodiment will not be executed.

[0032] By adjusting its own charging magnetic field control parameters according to the wireless charging device sorting results, it can be ensured that electronic devices can enter the wireless charging area when they are in the wireless charging zone. As the charging magnetic field is gradually adjusted, the charging efficiency is also improved accordingly.

[0033] Furthermore, any wireless charging device has a charging magnetic field sensing component. After receiving the magnetic field adjustment command, the k-th wireless charging device adjusts its own charging magnetic field control parameters with the aim of reducing interference with the existing charging magnetic field. This application embodiment also includes:

[0034] The charging magnetic field state information is collected through the charging magnetic field sensing component. The charging magnetic field state information includes the charging magnetic field direction and the charging magnetic field intensity time series curve, and the charging magnetic field direction and the charging magnetic field intensity time series curve correspond one-to-one.

[0035] Obtain the time-series curves of the direction and intensity of the local charging magnetic field of the k-th wireless charging device;

[0036] Based on the charging magnetic field direction and the charging magnetic field intensity time-series curve of the device, magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field intensity time-series curve to obtain the first magnetic field negative impact coefficient;

[0037] When the negative impact coefficient of the first magnetic field is less than the threshold of the negative impact coefficient of the magnetic field, the timing curves of the direction of the charging magnetic field and the intensity of the charging magnetic field are not adjusted, which is considered as the adjustment of the charging magnetic field being completed.

[0038] Furthermore, a charging magnetic field state information is collected through a charging magnetic field sensing component. This charging magnetic field state information includes a charging magnetic field direction and a charging magnetic field intensity time-series curve, with the charging magnetic field direction and the charging magnetic field intensity time-series curve corresponding one-to-one. This application embodiment also includes:

[0039] The charging magnetic field sensing component is used to receive the circumferential charging magnetic field of the kth wireless charging device, and the direction of the charging magnetic field is determined according to the direction of the induced current formed in the charging magnetic field sensing component.

[0040] The charging magnetic field strength time series is recorded in the direction of the charging magnetic field to determine the charging magnetic field strength time series curve.

[0041] Furthermore, to obtain the time-series curves of the direction and intensity of the local charging magnetic field of the k-th wireless charging device, this application embodiment also includes:

[0042] Obtain the electronic device location information of the k-th wireless charging device, wherein the electronic device location information includes electronic device orientation information;

[0043] Set the orientation information of the electronic device to the direction of the local charging magnetic field;

[0044] Obtain the charging magnetic field strength timing curve associated with the default AC current parameters of the k-th wireless charging device, and set it as the charging magnetic field strength timing curve of the local device.

[0045] Further, such as Figure 2 As shown, based on the charging magnetic field direction and the charging magnetic field intensity time-series curve of the device, and combining the charging magnetic field direction and the charging magnetic field intensity time-series curve, a magnetic field superposition loss calculation is performed to obtain a first magnetic field negative impact coefficient. This application embodiment also includes:

[0046] Traverse the time-series curves of the charging magnetic field strength and statistically analyze the average magnetic field strength at the k-th wireless charging device.

[0047] Extract the charging magnetic field strength time series curves where the average magnetic field strength is greater than or equal to the magnetic field strength threshold, and add them to the time series curves that affect the charging magnetic field strength.

[0048] Extract the influence of the charging magnetic field direction on the time-series curve of the charging magnetic field strength from the charging magnetic field direction;

[0049] Based on the time-series curves of the charging magnetic field direction and the charging magnetic field strength of the device, and combined with the time-series curves of the influence on the charging magnetic field direction and the influence on the charging magnetic field strength, a magnetic field superposition loss calculation is performed to obtain the first magnetic field negative impact coefficient.

[0050] In one possible embodiment, any wireless charging device has a charging magnetic field sensing component, wherein the charging magnetic field sensing component is a receiving coil array, which can receive the charging magnetic field of the wireless charging device in a 360° circumference, determine the direction of the charging magnetic field that has an effect, and improve the accuracy of magnetic field adjustment.

[0051] In one embodiment, the direction of the charging magnetic field is determined based on the direction of the induced current formed in the receiving coil of the charging magnetic field sensing component of the k-th wireless charging device. Then, the change in the charging magnetic field strength over time is recorded according to the charging magnetic field direction to obtain a corresponding charging magnetic field strength time-series curve. This charging magnetic field strength time-series curve shows the change in the charging magnetic field strength emitted by the wireless charging device in the direction of its corresponding electronic device's location information, according to the AC current parameter time-series recording information. The charging magnetic field direction and the charging magnetic field strength time-series curve correspond one-to-one.

[0052] The direction of the local charging magnetic field is the direction of the electronic device's location information corresponding to the k-th wireless charging device. The time-series curve of the local charging magnetic field strength is a time-series curve of the charging magnetic field strength associated with the default AC current parameters of the k-th wireless charging device, reflecting the change of the charging magnetic field strength emitted by the k-th wireless charging device towards the location information of the corresponding electronic device over time.

[0053] Based on the charging magnetic field direction and the time-series curve of the charging magnetic field intensity, a magnetic field superposition loss calculation is performed. That is, the magnetic field intensity loss value of the superimposed magnetic field relative to the original magnetic field is determined, and a first negative magnetic field coefficient is obtained. When the first negative magnetic field coefficient is less than the threshold value (the maximum intensity loss value preset by those skilled in the art when performing charging magnetic field superposition), it indicates that the magnetic field intensity loss after superposition is within an allowable range. In this case, no adjustment is made to the charging magnetic field direction and the time-series curve of the charging magnetic field intensity; the charging magnetic field adjustment is considered complete.

[0054] Furthermore, embodiments of this application also include:

[0055] When the negative impact coefficient of the first magnetic field is greater than or equal to the threshold of the negative impact coefficient of the magnetic field, the phase and / or frequency of the time series curve of the charging magnetic field strength of the device is updated to obtain the time series curve of the updated magnetic field strength of the first device.

[0056] When the maximum value of the first local charging magnetic field strength update timing curve and the maximum value of each of the charging magnetic field strength timing curves do not occur simultaneously, the k-th wireless charging device is controlled according to the first local charging magnetic field strength update timing curve and the direction of the local charging magnetic field, which is considered as the charging magnetic field adjustment being completed.

[0057] When the maximum value of the first local charging magnetic field strength update timing curve and the maximum value of any other charging magnetic field strength timing curve occur simultaneously, the phase and / or frequency of the first local charging magnetic field strength update timing curve are updated.

[0058] Furthermore, embodiments of this application also include:

[0059] When the number of updates of the phase and / or frequency of the time-series curve of the local charging magnetic field strength is greater than or equal to the preset number of updates, and the charging magnetic field adjustment is still not completed, the amplitude of the time-series curve of the local charging magnetic field strength is updated to obtain a second time-series curve of the local charging magnetic field strength update.

[0060] Based on the direction of the charging magnetic field and the time-series curve of the second charging magnetic field intensity, a magnetic field superposition loss calculation is performed to obtain the second magnetic field negative impact coefficient.

[0061] When the negative impact coefficient of the second magnetic field is less than the threshold of the negative impact coefficient of the magnetic field, the kth wireless charging device is controlled according to the timing curve of the second local charging magnetic field strength update and the direction of the local charging magnetic field, which is considered as the adjustment of the charging magnetic field is completed.

[0062] When the negative impact coefficient of the second magnetic field is greater than or equal to the threshold value of the negative impact coefficient of the magnetic field, the amplitude of the timing curve of the second local charging magnetic field strength update is updated.

[0063] In one possible embodiment, when the negative impact coefficient of the first magnetic field is greater than or equal to the threshold value of the negative impact coefficient of the magnetic field, it indicates that the charging magnetic field of the device is causing excessive interference to other wireless charging devices located in the foreground. In this case, it is necessary to adjust the timing of the device's charging magnetic field to reduce interference to other wireless charging devices that are currently operating by staggering the timing. Preferably, by updating the phase and / or frequency of the timing curve of the device's charging magnetic field strength, it is possible to avoid reaching the maximum value at the same time as other wireless charging devices that are currently operating, thereby reducing interference during the charging process and avoiding heat generated due to excessive interference.

[0064] Optionally, the charging magnetic field strength time-series curves are traversed, and the average magnetic field strength of the charging magnetic field generated by the corresponding wireless charging devices at the k-th wireless charging device is statistically analyzed. Then, based on the preset magnetic field strength threshold (the minimum charging magnetic field strength that affects the charging magnetic field at the k-th wireless charging device as preset by those skilled in the art), the average magnetic field strength is filtered, and the average magnetic field strength at the k-th wireless charging device is extracted from the traversed charging magnetic field strength time-series curves and added to the time-series curves affecting the charging magnetic field strength. Furthermore, based on the one-to-one correspondence between the charging magnetic field direction and the charging magnetic field strength time-series curves, the direction of the influencing charging magnetic field is extracted from the charging magnetic field direction.

[0065] Preferably, the direction of the local charging magnetic field and the direction of the influencing charging magnetic field are calculated using vectors to determine the direction of the superimposed magnetic field. Then, the time-series curves of the local charging magnetic field intensity and the influencing charging magnetic field intensity are time-aligned. The charging magnetic field intensity at each corresponding time point is then superimposed, and the difference between the sum of the superimposed calculation results and the superimposed charging magnetic field intensity before the k-th wireless charging device operates is calculated. This result is then compared with the superimposed charging magnetic field intensity before the k-th wireless charging device operates to obtain the first negative magnetic field coefficient. The first negative magnetic field coefficient reflects the degree of influence of the superimposed charging magnetic field formed by the k-th wireless charging device on other operating wireless charging devices after it starts operating.

[0066] In one embodiment, when the maximum charging magnetic field strength of the first local charging magnetic field strength update timing curve does not occur simultaneously with the maximum charging magnetic field strength of each of the other charging magnetic field strength timing curves, it indicates that the local charging magnetic field does not reach its maximum value at the same time as the charging magnetic fields of any other working wireless charging device. In this case, even if the local device is too close to any working wireless charging device, it will not cause significant interference. At this point, the k-th wireless charging device can be controlled based on the first local charging magnetic field strength update timing curve and the direction of the local charging magnetic field, which is considered a completion of the charging magnetic field adjustment.

[0067] When the maximum value of the first local charging magnetic field strength update timing curve and the maximum value of any other charging magnetic field strength timing curve occur simultaneously, in order to prevent the local device from reaching its maximum value at the same time as other wireless charging devices that are working, the phase and / or frequency will continue to be updated based on the first local charging magnetic field strength update timing curve, and the number of updates will be counted as 1.

[0068] Based on the updated curve analysis, it is determined whether the maximum charging magnetic field strength of the device does not occur simultaneously with the maximum charging magnetic field strength of each of the aforementioned charging magnetic field strength time-series curves. If so, the k-th wireless charging device is controlled based on the updated first device charging magnetic field strength update time-series curve and the device charging magnetic field direction, at which point the charging magnetic field adjustment is complete. If not, the update count is incremented by 1, resulting in an update count of 2, and phase and / or frequency adjustments are performed based on the updated first device charging magnetic field strength update time-series curve.

[0069] When the number of updates to the phase and / or frequency of the timing curve of the local charging magnetic field strength is greater than or equal to the preset number of updates, and the charging magnetic field adjustment is still not completed, it indicates that continuing to adjust the interference at this time can no longer meet the requirements. It is necessary to suppress the local charging magnetic field, update the amplitude of the timing curve of the local charging magnetic field strength to reduce the interference effect, and obtain the second timing curve of the local charging magnetic field strength update.

[0070] Furthermore, based on the same principle as the first magnetic field negative impact coefficient, a second magnetic field negative impact coefficient is obtained by performing magnetic field superposition loss calculation based on the direction of the local charging magnetic field and the time series curve of the second local charging magnetic field intensity, combined with the direction of the charging magnetic field and the time series curve of the charging magnetic field intensity. The second magnetic field negative impact coefficient represents the degree of influence of the updated local charging magnetic field, after amplitude adjustment, on the charging magnetic fields of other operating wireless charging devices.

[0071] When the negative impact coefficient of the second magnetic field is less than the threshold of the negative impact coefficient of the magnetic field, it indicates that the interference of the updated local charging magnetic field on the charging magnetic field of other working wireless charging devices is within the allowable range. At this time, the kth wireless charging device is controlled according to the timing curve of the second local charging magnetic field strength and the direction of the local charging magnetic field, which is considered as the adjustment of the charging magnetic field is completed.

[0072] When the negative impact coefficient of the second magnetic field is greater than or equal to the threshold value of the negative impact coefficient of the magnetic field, it indicates that the interference effect of the updated local charging magnetic field on the charging magnetic field of other working wireless charging devices still does not meet the requirements. At this time, it is necessary to continue to update the amplitude of the second local charging magnetic field strength update timing curve until the requirements are met.

[0073] According to the order of adjustment, the k-th wireless charging device will adjust its own charging magnetic field in turn to reduce its influence on the charging magnetic field of the wireless charging device with higher charging efficiency that is in operation in front of it, thereby achieving the technical effect of improving the efficiency of collaborative charging.

[0074] Furthermore, to obtain the charging magnetic field strength time-series curve associated with the default AC current parameters of the k-th wireless charging device, this embodiment of the application also includes:

[0075] Based on the model of the kth wireless charging device, collect the timing record information of AC current parameters and the timing record information of charging magnetic field strength;

[0076] Using the charging magnetic field strength time-series record information as supervision and the alternating current parameter time-series record information as input, a charging magnetic field strength time-series information prediction model is trained.

[0077] Based on the charging magnetic field strength time-series information prediction model, and using the default AC current parameters, the charging magnetic field strength time-series curve is constructed.

[0078] In one embodiment, the k-th wireless charging device model is used as an index to retrieve data from a database (including data on the changes in charging magnetic field strength over time for different wireless charging device models with varying AC current parameters) to obtain AC current parameter timing record information and charging magnetic field strength timing record information. The AC current parameter timing record information includes data on the changes in phase, frequency, and amplitude over time, with each data point containing a timestamp to ensure data consistency over time.

[0079] Furthermore, the cleaned AC current parameter time-series records are used as input features, and the charging magnetic field strength time-series records are used as labels to form a training set. A suitable model for time-series prediction, such as a Long Short-Term Memory (LSTM) network, is selected, and the selected model is trained using the training set. The model parameters are continuously adjusted through algorithms such as backpropagation and gradient descent to optimize model performance. Then, a portion of untrained data is prepared as a test set to verify the model's generalization ability. The model performance is evaluated using the test set, with common metrics including mean squared error (MSE) and root mean square error (RMSE). Based on the evaluation results, the model structure or hyperparameters are adjusted to improve prediction accuracy. The default AC current parameters of the k-th wireless charging device are obtained and input into the trained charging magnetic field strength time-series information prediction model for analysis to obtain the charging magnetic field strength time-series curve. Through the above steps, a charging magnetic field strength time-series information prediction model can be effectively constructed and utilized to optimize the charging process of wireless charging devices.

[0080] Furthermore, after receiving the magnetic field adjustment command, the k-th wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field. This embodiment of the application also includes:

[0081] When the kth wireless charging device receives the magnetic field adjustment command, it obtains the three-phase current parameters of the power grid connected to the kth wireless charging device;

[0082] Extract the zero point of any one phase of the three-phase current parameters of the power grid;

[0083] Calculate the first timing relationship between the zero point and the first local clock signal of the k-th wireless charging device;

[0084] Timing begins when the charging magnetic field is emitted. When the time equals the preset correction period, the second timing relationship between the zero point and the second local clock signal of the kth wireless charging device is calculated.

[0085] When the first timing relationship is different from the second timing relationship, the second timing relationship is corrected according to the first timing relationship, and the timing is reset to 0 to start timing.

[0086] In one possible embodiment, when the k-th wireless charging device receives the magnetic field adjustment command, it obtains the three-phase current parameters of the power grid connected to the k-th wireless charging device, wherein the three-phase current parameters of the power grid include phase current, current phase, etc. Then, it extracts the zero points of any phase of the three-phase current parameters of the power grid, such as the zero points of phase A current.

[0087] Furthermore, a first timing relationship between the zero point and the first local clock signal of the k-th wireless charging device is calculated, i.e., the timing difference between the first local clock signal and the zero point. Timing begins when the charging magnetic field is emitted. When the timing length equals a preset correction period (set by those skilled in the art, such as 10 minutes or 15 minutes), a second timing relationship between the zero point and the second local clock signal of the k-th wireless charging device is calculated, i.e., the timing difference between the second local clock signal and the zero point. When the first timing relationship differs from the second timing relationship, the second timing relationship is corrected according to the first timing relationship, and the timing is reset to 0. Thus, the technical effect of using the zero point of the power grid as a reference point to correct the local clock of the wireless charging device is achieved, improving the accuracy and efficiency of collaborative charging.

[0088] In summary, the embodiments of this application have at least the following technical effects:

[0089] 1. By adjusting the magnetic field in a specific order, all wireless charging devices in the system can work in coordination, thus improving the efficiency of collaborative charging among multiple wireless charging devices.

[0090] 2. This allows each wireless charging device working in coordination to correct its own clock signal after a period of operation, thereby improving the quality and efficiency of collaborative charging.

[0091] Example 2: Based on the same inventive concept as the multi-wireless charging device collaborative charging method in the foregoing examples, this application provides a wireless charging system, which includes a central control unit and multiple wireless charging devices, wherein each wireless charging device has a charging magnetic field sensing component.

[0092] Further, preferably, the system includes a processor, a memory, and a network interface. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores collaborative charging data. The network interface is used for communication with external terminals via a network connection. The computer program is executed by the processor to implement a collaborative charging method for multiple wireless charging devices.

[0093] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, the above description focuses on specific embodiments of this specification. Additionally, the processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing are possible or may be advantageous.

[0094] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0095] This specification and accompanying drawings are merely illustrative examples of this application and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Therefore, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A method for collaborative charging of multiple wireless charging devices, characterized in that, An application in a wireless charging system, the system comprising a central control unit and multiple wireless charging devices, including: Step 1: When the electronic device enters the preset charging range of N wireless charging devices, the N location information of the electronic device is uploaded to the central control unit by the N wireless charging devices respectively, wherein the total number of wireless charging devices is ≥ N≥ 1; Step 2: When the central control unit receives the N location information of the electronic device, it sorts the N wireless charging devices in ascending order of their distance from the electronic device based on the N location information of the electronic device, and obtains the first wireless charging device up to the Nth wireless charging device. Step 3: The central control unit issues standby commands to the third wireless charging device up to the Nth wireless charging device; Step 4: Extract the kth wireless charging device from the first wireless charging device to the Nth wireless charging device, and send a magnetic field adjustment command to the kth wireless charging device through the central control unit, where the initial value of k is equal to 2; Step 5: After receiving the magnetic field adjustment command, the k-th wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field. When the charging magnetic field control parameters of the k-th wireless charging device are adjusted and started, it returns a charging magnetic field adjustment completion signal to the central control unit. If k≥N, the process stops. If k<N, the k value is updated by k+1, and then the process returns to step 4 to execute the loop. Each wireless charging device has a charging magnetic field sensing component. After receiving the magnetic field adjustment command, the k-th wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field, including: The charging magnetic field state information is collected through the charging magnetic field sensing component. The charging magnetic field state information includes the charging magnetic field direction and the charging magnetic field intensity time series curve, and the charging magnetic field direction and the charging magnetic field intensity time series curve correspond one-to-one. Obtain the time-series curves of the direction and intensity of the local charging magnetic field of the k-th wireless charging device; Based on the charging magnetic field direction and the charging magnetic field intensity time-series curve of the device, magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field intensity time-series curve to obtain the first magnetic field negative impact coefficient; When the negative impact coefficient of the first magnetic field is less than the threshold of the negative impact coefficient of the magnetic field, the timing curves of the direction of the charging magnetic field and the intensity of the charging magnetic field are not adjusted, which is considered as the adjustment of the charging magnetic field being completed.

2. The method as described in claim 1, characterized in that, Also includes: When the negative impact coefficient of the first magnetic field is greater than or equal to the threshold of the negative impact coefficient of the magnetic field, the phase and / or frequency of the time series curve of the charging magnetic field strength of the device is updated to obtain the time series curve of the updated magnetic field strength of the first device. When the maximum value of the first local charging magnetic field strength update timing curve and the maximum value of each of the charging magnetic field strength timing curves do not occur simultaneously, the k-th wireless charging device is controlled according to the first local charging magnetic field strength update timing curve and the direction of the local charging magnetic field, which is considered as the charging magnetic field adjustment being completed. When the maximum value of the first local charging magnetic field strength update timing curve and the maximum value of any other charging magnetic field strength timing curve occur simultaneously, the phase and / or frequency of the first local charging magnetic field strength update timing curve are updated.

3. The method as described in claim 2, characterized in that, Also includes: When the number of updates of the phase and / or frequency of the time-series curve of the local charging magnetic field strength is greater than or equal to the preset number of updates, and the charging magnetic field adjustment is still not completed, the amplitude of the time-series curve of the local charging magnetic field strength is updated to obtain a second time-series curve of the local charging magnetic field strength update. Based on the time-series curve of the charging magnetic field direction and the second charging magnetic field strength, magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field strength time-series curve to obtain the second magnetic field negative impact coefficient. When the negative impact coefficient of the second magnetic field is less than the threshold of the negative impact coefficient of the magnetic field, the kth wireless charging device is controlled according to the timing curve of the second local charging magnetic field strength update and the direction of the local charging magnetic field, which is considered as the adjustment of the charging magnetic field is completed. When the negative impact coefficient of the second magnetic field is greater than or equal to the threshold value of the negative impact coefficient of the magnetic field, the amplitude of the timing curve of the second local charging magnetic field strength update is updated.

4. The method as described in claim 1, characterized in that, Obtaining the time-series curves of the direction and intensity of the local charging magnetic field of the k-th wireless charging device includes: Obtain the electronic device location information of the k-th wireless charging device, wherein the electronic device location information includes electronic device orientation information; Set the orientation information of the electronic device to the direction of the local charging magnetic field; Obtain the charging magnetic field strength timing curve associated with the default AC current parameters of the k-th wireless charging device, and set it as the charging magnetic field strength timing curve of the local device.

5. The method as described in claim 4, characterized in that, Based on the charging magnetic field direction and the charging magnetic field intensity time-series curve of the device, and combining the charging magnetic field direction and the charging magnetic field intensity time-series curve, a magnetic field superposition loss calculation is performed to obtain a first magnetic field negative impact coefficient, including: Traverse the time-series curves of the charging magnetic field strength and statistically analyze the average magnetic field strength at the k-th wireless charging device. Extract the charging magnetic field strength time series curves where the average magnetic field strength is greater than or equal to the magnetic field strength threshold, and add them to the time series curves that affect the charging magnetic field strength. Extract the influence of the charging magnetic field direction on the time-series curve of the charging magnetic field strength from the charging magnetic field direction; Based on the time-series curves of the charging magnetic field direction and the charging magnetic field strength of the device, and combined with the time-series curves of the influence on the charging magnetic field direction and the influence on the charging magnetic field strength, a magnetic field superposition loss calculation is performed to obtain the first magnetic field negative impact coefficient.

6. The method according to any one of claims 1 to 5, characterized in that, After receiving the magnetic field adjustment command, the k-th wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field, and further includes: When the kth wireless charging device receives the magnetic field adjustment command, it obtains the three-phase current parameters of the power grid connected to the kth wireless charging device; Extract the zero point of any one phase of the three-phase current parameters of the power grid; Calculate the first timing relationship between the zero point and the first local clock signal of the k-th wireless charging device; Timing begins when the charging magnetic field is emitted. When the time equals the preset correction period, the second timing relationship between the zero point and the second local clock signal of the kth wireless charging device is calculated. When the first timing relationship is different from the second timing relationship, the second timing relationship is corrected according to the first timing relationship, and the timing is reset to 0 to start timing.

7. The method as described in claim 5, characterized in that, Obtain the charging magnetic field strength time-series curve associated with the default AC current parameters of the k-th wireless charging device, including: Based on the model of the kth wireless charging device, collect the timing record information of AC current parameters and the timing record information of charging magnetic field strength; Using the charging magnetic field strength time-series record information as supervision and the alternating current parameter time-series record information as input, a charging magnetic field strength time-series information prediction model is trained. Based on the charging magnetic field strength time-series information prediction model, and using the default AC current parameters, the charging magnetic field strength time-series curve is constructed.

8. The method as described in claim 1, characterized in that, The charging magnetic field state information is collected through a charging magnetic field sensing component. This charging magnetic field state information includes a charging magnetic field direction and a charging magnetic field intensity time-series curve. The charging magnetic field direction and the charging magnetic field intensity time-series curve correspond one-to-one. The charging magnetic field sensing component is used to receive the circumferential charging magnetic field of the kth wireless charging device, and the direction of the charging magnetic field is determined according to the direction of the induced current formed in the charging magnetic field sensing component. The charging magnetic field strength time series is recorded in the direction of the charging magnetic field to determine the charging magnetic field strength time series curve.

9. A wireless charging system, characterized in that, The system includes a central control unit and multiple wireless charging devices, and the system is used to implement the multi-wireless charging device collaborative charging method as described in any one of claims 1 to 8.

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