Cooperative charging method for multiple wireless charging devices

Abstract

The invention discloses a multi-wireless-charging-device cooperative charging method, and relates to the technical field of wireless charging, and the method comprises the steps: when a to-be-charged electronic device enters a charging range of a wireless charging device, not adjusting a charging magnetic field of a first wireless charging device closest to the first wireless charging device, enabling a third wireless charging device to an Nth wireless charging device to be in a standby state, and enabling a second wireless charging device to be in a standby state; the charging magnetic field of the first wireless charging device is used as the reference magnetic field, the charging magnetic field control parameters of the second wireless charging device are adjusted, and after interference on the charging magnetic field of the first wireless charging device is reduced, it is regarded that adjustment of the second wireless charging device is completed. Then, the charging magnetic fields of the first wireless charging equipment and the second wireless charging equipment are regarded as reference magnetic fields, and the charging magnetic field control parameters of the third wireless charging equipment are adjusted until circulation is completed until the charging magnetic field control parameters of the Nth wireless charging equipment are adjusted; the technical problem that in the prior art, the working time sequence of wireless charging equipment is independent and conflicts, and consequently the charging efficiency is reduced is solved.

Description

Technical Field

[0001] The present invention relates to the field of wireless charging technology, and in particular to a method for collaborative charging of multiple wireless charging devices. Background Art

[0002] At present, the wireless charging system for home use on the market arranges all wireless charging devices around the main activity area of ​​the room. In this way, once an electronic device enters the main activity area, any wireless charging device can form a charging magnetic field pointing to the electronic device by autonomously positioning the direction of the electronic device. This results in multiple wireless charging devices being easily interfered by other wireless charging devices when working, resulting in a decrease in charging efficiency. Moreover, the working timing of each charging device is independent of each other, and the working timing of each charging device is provided by the clock (local clock) generated by its own local crystal oscillator. However, when the wireless charging device forms a charging magnetic field, the internal heat generated is very large. The local clocks of each wireless charging device drift under the influence of high temperature, which can easily lead to the situation where the magnetic field influence is not discovered. Summary of the invention

[0003] The present application provides a method for collaborative charging of multiple wireless charging devices, which is used to solve the technical problem in the prior art that the working timings of wireless charging devices are independent of each other and are easily affected by other charging devices, resulting in reduced charging efficiency.

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

[0005] In a first aspect of the present application, a method for collaborative charging of multiple wireless charging devices is provided, the method comprising: step 1: when an electronic device enters a preset charging range of N wireless charging devices of the multiple wireless charging devices, the N wireless charging devices are used to upload N position information of the electronic device to the central control unit respectively, wherein the total number of wireless charging devices ≥ N ≥ 1; step 2: when the central control unit receives the N position information of the electronic device, based on the N position information of the electronic device, the N wireless charging devices are sorted from small to large according to the distance from the electronic device to obtain the first wireless charging device to the Nth wireless charging device; step 3: the central control unit is used to sort the third wireless charging device Until the Nth wireless charging device issues a standby instruction; 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 instruction to the kth wireless charging device through the central control unit, wherein the initial value of k is equal to 2; Step 5: After receiving the magnetic field adjustment instruction, 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, a charging magnetic field adjustment completion signal is returned to the central control unit. If k≥N, the process is stopped. If k<N, after updating the k value through k+1, return to step 4 to execute the loop.

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

[0007] One or more technical solutions provided in this application have at least the following technical effects or advantages: In the present application, at the beginning of the adjustment, the charging magnetic field of the first wireless charging device that is closest is not adjusted, the third to Nth wireless charging devices are put on standby, the charging magnetic field of the first wireless charging device is used as the reference magnetic field, and the charging magnetic field control parameters of the second wireless charging device are adjusted. After 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 to be completed. Then, the charging magnetic fields of the first wireless charging device and the second wireless charging device are regarded as the reference magnetic field, and 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. At this time, the charging magnetic field formed takes into account the mutual interference of the magnetic fields. Compared with the traditional wireless charging devices that work independently of each other, the conflict influence of the charging magnetic field is reduced, and the technical effect of improving the charging efficiency of multiple wireless charging devices is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0009] Figure 1 A schematic diagram of a process flow of a method for collaborative charging of multiple wireless charging devices provided in an embodiment of the present application; Figure 2 This is a schematic diagram of a process for obtaining a first magnetic field negative impact coefficient in a method for cooperative charging of multiple wireless charging devices provided in an embodiment of the present application. DETAILED DESCRIPTION

[0010] The present application provides a method for collaborative charging of multiple wireless charging devices, which is used to solve the technical problem in the prior art that the working timings of wireless charging devices are independent of each other and are easily affected by other charging devices, resulting in reduced charging efficiency.

[0011] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0012] It should be noted that the terms "including" and "having" are intended to cover non-exclusive inclusions. 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 explicitly listed, but may include other steps or modules that are not explicitly listed or inherent to these processes, methods, products or devices.

[0013] Embodiment 1, as Figure 1 As shown, the present application provides a method for cooperative charging of multiple wireless charging devices, which is applied to a wireless charging system, wherein the system includes 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 of the multiple wireless charging devices, the N wireless charging devices are used to upload N location information of the electronic device to the central control unit respectively, wherein the total number of wireless charging devices ≥ N ≥ 1; Step 2: When the central control unit receives the N position information of the electronic device, based on the N position information of the electronic device, the N wireless charging devices are sorted from small to large according to the distance from the electronic device to obtain the first wireless charging device to the Nth wireless charging device; In an embodiment of the present application, the central control unit is used to receive information from multiple wireless charging devices and issue corresponding instructions to multiple wireless charging devices. The multiple wireless charging devices periodically transmit signals, and the electronic device to be charged will respond to these signals for information exchange when entering the preset charging range of the corresponding wireless charging device, that is, the wireless charging range constructed according to the preset radius with each wireless charging device as the center of the circle in advance, so as to confirm that the electronic device has entered. Optionally, the N wireless charging devices that perform information exchange send lasers to the electronic device and measure the time and direction of reflection back to determine the direction and distance of the electronic device to the N wireless charging devices, thereby obtaining N position information of the electronic device. Among them, the N wireless charging devices configure the charging magnetic field strength and charging frequency according to the N position information of the electronic device, and form a charging magnetic field in the direction of the electronic device respectively. 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 to the electronic device means that the direction in which the average magnetic field strength is the highest is always pointing to the electronic device, not that the direction of the strongest magnetic field in real time is always pointing to the electronic device. Then, the N wireless charging devices upload the N position information of the electronic device obtained to the central control unit respectively. The N wireless charging devices belong to the multiple wireless charging devices, the total number of wireless charging devices ≥ N ≥ 1, and the total number of wireless charging devices is the total number of multiple wireless charging devices, that is, each collaborative control is only for a number of wireless charging devices that charge a certain electronic device to be charged, and the number is at least 1 and at most the total number of wireless charging devices.

[0014] Optionally, when the central control unit receives N pieces of location information of the electronic device, the N wireless charging devices are sorted from small to large according to the distances in the N pieces of location information of the electronic device to obtain a wireless charging device sorting result.

[0015] Furthermore, if the wireless charging device sorting result is obtained by sorting the distances in the N position information of the electronic device from small to large, the first wireless charging device to the Nth wireless charging device are sequentially extracted from the beginning to the end. It can be seen that the first distance between the first wireless charging device and the electronic device to the Nth distance between the Nth wireless charging device and the electronic device increases in sequence, 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.

[0016] By extracting the first wireless charging device to the Nth wireless charging device to define the application priority levels of N wireless charging devices, it is convenient to pave the way for the subsequent orderly adjustment of the charging magnetic field.

[0017] Step 3: Sending a standby instruction to the third wireless charging device until the Nth wireless charging device through the central control unit; Step 4: extracting the kth wireless charging device from the first wireless charging device to the Nth wireless charging device, and sending a magnetic field adjustment instruction to the kth wireless charging device through the central control unit, wherein the initial value of k is equal to 2; In a preferred embodiment, a magnetic field adjustment instruction is sent to the kth wireless charging device through the central control unit, and the initial value of k is equal to 2. That is to say, the charging magnetic field adjustment is started from the first wireless charging device to the second wireless charging device in the Nth wireless charging device, and the kth wireless charging device belongs to any wireless charging device from the first wireless charging device to the Nth wireless charging device.

[0018] At the same time as the central control unit sends the magnetic field adjustment instruction to the kth wireless charging device, or in advance, the central control unit sends a standby instruction to the third wireless charging device until the Nth wireless charging device to stop emitting the charging magnetic field, so as to avoid the third wireless charging device until the Nth wireless charging device affecting the charging magnetic field adjustment of the kth wireless charging device.

[0019] For the wireless charging device that is closest in the wireless charging device sorting result, there is no need to make any adjustments to its charging magnetic field. This is because the wireless charging device that is closest 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 low charging efficiency.

[0020] That is to say, the third wireless charging device until 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 working state and has been generating a charging magnetic field to the electronic device, and the wireless charging of the electronic device is not interrupted. Therefore, the third wireless charging device until the Nth wireless charging device stops emitting a charging magnetic field can avoid interfering with the charging magnetic field adjustment of the second wireless charging device without affecting the charging of the electronic device, thereby achieving the technical effect of improving the coordination efficiency of the charging devices.

[0021] Step 5: After receiving the magnetic field adjustment instruction, 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 parameter adjustment of the k-th wireless charging device is completed and started, a charging magnetic field adjustment completion signal is returned to the central control unit. If k≥N, the process is stopped. If k<N, after updating the k value through k+1, return to step 4 to execute the loop.

[0022] In an embodiment of the present application, after receiving the magnetic field adjustment instruction, the kth wireless charging device adjusts the relevant parameters of the charging magnetic field. When k=2, the kth wireless charging device adjusts its own charging magnetic field through the monitoring stage and the adjustment stage. When k≥3, the kth wireless charging device ends the standby state and adjusts its own magnetic field through the monitoring stage and the adjustment stage. When the adjustment is completed, the charging magnetic field adjustment completion signal is fed back to the central control unit and the kth wireless charging device is started.

[0023] When k<N, it indicates that all wireless charging devices in the wireless charging device sorting result have not been adjusted. At this time, the k value is updated by k+1, and the process returns to step 4 to continue adjusting the self-charging magnetic field control parameters of the wireless charging device in the next adjustment sequence with the goal of reducing interference with the existing charging magnetic field. When k≥N, it indicates that all wireless charging devices in the wireless charging device sorting result have been adjusted, and the magnetic field adjustment process is stopped to achieve the coordinated charging of N wireless charging devices to the electronic device, thereby achieving the technical effect of improving the efficiency of coordinated charging of multiple wireless charging devices.

[0024] Preferably, when N=1, since the initial value of k is greater than N, the process of the embodiment of the present application will not be executed.

[0025] By adjusting the charging magnetic field control parameters according to the ranking results of the wireless charging devices, it can be ensured that the electronic devices can enter wireless charging when they are in the wireless charging area. As the charging magnetic field adjustment is gradually carried out, the charging efficiency is also improved synchronously.

[0026] Further, any one of the wireless charging devices has a charging magnetic field sensing component, and after the kth wireless charging device receives the magnetic field adjustment instruction, it adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field. The embodiment of the present application also includes: The charging magnetic field state information is collected through the charging magnetic field sensing component, wherein the charging magnetic field state information includes a charging magnetic field direction and a charging magnetic field strength time series curve, and the charging magnetic field direction and the charging magnetic field strength time series curve correspond to each other one by one; Obtaining a local charging magnetic field direction and a local charging magnetic field strength time series curve of the kth wireless charging device; According to the local charging magnetic field direction and the local charging magnetic field strength time series curve, a 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 a first magnetic field negative impact coefficient; When the first magnetic field negative impact coefficient is less than the magnetic field negative impact coefficient threshold, the local charging magnetic field direction and the local charging magnetic field strength timing curve are not adjusted, and the charging magnetic field adjustment is considered to be completed.

[0027] Further, the charging magnetic field state information is collected through the charging magnetic field sensing component, wherein the charging magnetic field state information includes a charging magnetic field direction and a charging magnetic field strength timing curve, and the charging magnetic field direction and the charging magnetic field strength timing curve correspond one to one. The embodiment of the present application also includes: Utilizing the charging magnetic field induction component to receive a circumferential charging magnetic field from the kth wireless charging device, and determining the direction of the charging magnetic field according to the direction of the induced current formed in the charging magnetic field induction component; The charging magnetic field strength time series is recorded for the charging magnetic field direction to determine the charging magnetic field strength time series curve.

[0028] Further, the local charging magnetic field direction and the local charging magnetic field strength time series curve of the kth wireless charging device are obtained, and the embodiment of the present application also includes: Obtaining electronic device location information of the kth wireless charging device, wherein the electronic device location information includes electronic device direction information; Setting the electronic device direction information to the charging magnetic field direction of the device; A charging magnetic field strength timing curve stored in association with a default alternating current parameter of the kth wireless charging device is obtained, and is set as the local charging magnetic field strength timing curve.

[0029] Further, such as Figure 2 As shown, according to the local charging magnetic field direction and the local charging magnetic field strength timing curve, the magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field strength timing curve to obtain the first magnetic field negative impact coefficient. The embodiment of the present application also includes: Traversing the charging magnetic field strength time series curve, and counting the average magnetic field strength at the kth wireless charging device; Extracting the charging magnetic field strength timing curve whose average magnetic field strength is greater than or equal to the magnetic field strength threshold, and adding it into the timing curve affecting the charging magnetic field strength; Extracting the influencing charging magnetic field direction affecting the charging magnetic field intensity timing curve from the charging magnetic field direction; According to the local charging magnetic field direction and the local charging magnetic field strength timing curve, a magnetic field superposition loss calculation is performed in combination with the influencing charging magnetic field direction and the influencing charging magnetic field strength timing curve to obtain a first magnetic field negative impact coefficient.

[0030] In a 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, and the receiving coil array can receive the charging magnetic field of the wireless charging device in a 360° circumferential direction, determine the direction of the charging magnetic field that has an impact, and improve the accuracy of the magnetic field adjustment.

[0031] In one embodiment, the charging magnetic field direction is determined according to the charging magnetic field sensing component of the kth wireless charging device, that is, the direction of the induced current formed in the receiving coil. Then, the change of the charging magnetic field strength over time is recorded according to the charging magnetic field direction, and the corresponding charging magnetic field strength timing curve is obtained. Among them, the charging magnetic field strength timing curve is the change of the charging magnetic field strength emitted by the wireless charging device in the direction of the electronic device location information corresponding to it according to the alternating current parameter timing recording information. The charging magnetic field direction and the charging magnetic field strength timing curve correspond one to one.

[0032] The local charging magnetic field direction is the direction of the electronic device location information corresponding to the kth wireless charging device. The local charging magnetic field strength timing curve is a charging magnetic field strength timing curve stored in association with the default alternating current parameter of the kth wireless charging device, reflecting the change of the charging magnetic field strength emitted by the kth wireless charging device in the direction of the corresponding electronic device location information over time.

[0033] According to the local charging magnetic field direction and the local charging magnetic field intensity timing curve, the magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field intensity timing curve, that is, the magnetic field intensity loss value of the superimposed magnetic field relative to the magnetic field before superimposition is determined to obtain the first magnetic field negative impact coefficient. When the first magnetic field negative impact coefficient is less than the magnetic field negative impact coefficient threshold (the maximum intensity loss value when the charging magnetic field is superimposed, which is pre-set by a person skilled in the art), it indicates that the magnetic field intensity loss after superposition is within the allowable range. At this time, the local charging magnetic field direction and the local charging magnetic field intensity timing curve are not adjusted, and the charging magnetic field adjustment is deemed to be completed.

[0034] Furthermore, the embodiment of the present application also includes: When the first magnetic field negative impact coefficient is greater than or equal to the magnetic field negative impact coefficient threshold, updating the phase and / or frequency of the local charging magnetic field strength timing curve to obtain a first local charging magnetic field strength update timing curve; When the maximum charging magnetic field intensity of the first local charging magnetic field intensity update timing curve and the maximum charging magnetic field intensity of each of the charging magnetic field intensity timing curves do not appear at the same time, the kth wireless charging device is controlled according to the first local charging magnetic field intensity update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is considered to be completed; When the maximum charging magnetic field intensity of the first local charging magnetic field intensity update timing curve and the maximum charging magnetic field intensity of any one of the charging magnetic field intensity timing curves appear simultaneously, the phase and / or frequency of the first local charging magnetic field intensity update timing curve is updated.

[0035] Furthermore, the embodiment of the present application also includes: When the update times of the phase and / or frequency of the local charging magnetic field strength timing curve are greater than or equal to the preset update times and the charging magnetic field adjustment is still not completed, updating the amplitude of the local charging magnetic field strength timing curve to obtain a second local charging magnetic field strength update timing curve; According to the local charging magnetic field direction and the second local charging magnetic field strength timing curve, a magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field strength timing curve to obtain a second magnetic field negative impact coefficient; When the second magnetic field negative impact coefficient is less than the magnetic field negative impact coefficient threshold, the kth wireless charging device is controlled according to the second local charging magnetic field strength update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is considered to be completed; When the second magnetic field negative impact coefficient is greater than or equal to the magnetic field negative impact coefficient threshold, the amplitude of the second local charging magnetic field strength update timing curve is updated.

[0036] In a possible embodiment, when the first magnetic field negative impact coefficient is greater than or equal to the magnetic field negative impact coefficient threshold, it indicates that the charging magnetic field of the local device has caused too much interference to other wireless charging devices in the front row. At this time, it is necessary to adjust the timing of the charging magnetic field of the local device first, and reduce the interference to other working wireless charging devices by staggering the timing. Preferably, by updating the phase and / or frequency of the timing curve of the charging magnetic field strength of the local device, it is possible to avoid reaching the maximum value at the same time as other working wireless charging devices, reduce interference during the charging process, and avoid heat generated by excessive interference.

[0037] Optionally, the charging magnetic field strength timing curve is traversed, and the average magnetic field strength of the charging magnetic field generated by the corresponding wireless charging device at the kth wireless charging device is counted. Then, based on the preset magnetic field strength threshold (the minimum charging magnetic field strength that affects the charging magnetic field at the kth wireless charging device pre-set by a person skilled in the art), the average magnetic field strength is screened, and the average magnetic field strength at the kth wireless charging device is extracted by traversing the charging magnetic field strength timing curve, and the average magnetic field strength at the kth wireless charging device is counted and added to the timing curve affecting the charging magnetic field strength. Then, according to the one-to-one correspondence between the charging magnetic field direction and the charging magnetic field strength timing curve, the charging magnetic field direction affecting the charging magnetic field strength timing curve is extracted from the charging magnetic field direction.

[0038] Preferably, the local charging magnetic field direction and the influencing charging magnetic field direction are calculated using vectors to determine the superimposed magnetic field direction, and then the local charging magnetic field strength timing curve is time-aligned with the influencing charging magnetic field strength timing curve respectively, and then the charging magnetic field strength at each corresponding time point is superimposed, and the difference between the sum of the superimposed calculation results and the superimposed charging magnetic field strength before the kth wireless charging device works is calculated, and the calculation result is compared with the superimposed charging magnetic field strength before the kth wireless charging device works to obtain the first magnetic field negative impact coefficient. The first magnetic field negative impact coefficient reflects the degree of influence of the superimposed charging magnetic field formed by the kth wireless charging device after it works on other working wireless charging devices.

[0039] In one embodiment, when the maximum charging magnetic field intensity of the first local charging magnetic field intensity update timing curve and the maximum charging magnetic field intensity of each of the charging magnetic field intensity timing curves do not appear at the same time, it indicates that the charging magnetic field of the local device does not reach the maximum value at the same time as the charging magnetic field of each of the other working wireless charging devices. At this time, even if the distance between the local device and any of the working wireless charging devices is too low, it will not cause strong interference. At this time, the kth wireless charging device can be controlled according to the first local charging magnetic field intensity update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is considered to be completed.

[0040] When the maximum charging magnetic field strength of the first local charging magnetic field strength update timing curve and the maximum charging magnetic field strength of any one of the charging magnetic field strength timing curves appear at the same time, in order to avoid this local device and other working wireless charging devices reaching the maximum value at the same time, the phase and / or frequency are continued to be updated based on the first local charging magnetic field strength update timing curve, and the number of updates is counted as 1.

[0041] Based on the updated curve, analyze whether the local maximum charging magnetic field strength and the maximum charging magnetic field strength of each charging magnetic field strength timing curve do not appear at the same time. If so, the kth wireless charging device is controlled based on the updated first local charging magnetic field strength update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is completed at this time. If not, the update number is superimposed by 1, and the update number is 2 at this time, and the phase and / or frequency are adjusted and updated based on the updated first local charging magnetic field strength update timing curve.

[0042] When the number of updates of the phase and / or frequency of the local charging magnetic field strength timing curve 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 the interference adjustment at this time can no longer meet the requirements, and it is necessary to suppress the local charging magnetic field, update the amplitude of the local charging magnetic field strength timing curve to reduce the interference effect, and obtain the second local charging magnetic field strength update timing curve.

[0043] Furthermore, based on the same principle of obtaining the first magnetic field negative impact coefficient, the magnetic field superposition loss calculation is performed according to the local charging magnetic field direction and the second local charging magnetic field strength timing curve, and the charging magnetic field direction and the charging magnetic field strength timing curve are combined to obtain the second magnetic field negative impact coefficient. Wherein, the second magnetic field negative impact coefficient is the degree of influence of the updated local charging magnetic field on the charging magnetic field of other working wireless charging devices after the amplitude of the local charging magnetic field is adjusted.

[0044] When the second magnetic field negative impact coefficient is less than the magnetic field negative impact coefficient threshold, it indicates that the interference effect of the updated local charging magnetic field on the charging magnetic fields of other working wireless charging devices is within an allowable range. At this time, the kth wireless charging device is controlled according to the second local charging magnetic field strength update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is considered to be completed.

[0045] When the second magnetic field negative impact coefficient is greater than or equal to the magnetic field negative impact coefficient threshold, it indicates that the interference effect of the updated local charging magnetic field on the charging magnetic fields of other working wireless charging devices still cannot 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.

[0046] According to the order of adjustment, the kth 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 working state in front of it, thereby achieving the technical effect of improving the collaborative charging efficiency.

[0047] Further, a charging magnetic field strength timing curve associated with a default alternating current parameter of the kth wireless charging device is obtained, and the embodiment of the present application further includes: According to the kth wireless charging device model, collecting the time series recording information of the AC current parameter and the time series recording information of the charging magnetic field strength; Using the charging magnetic field strength time series record information as supervision and the AC current parameter time series record information as input, training a charging magnetic field strength time series information prediction model; According to the charging magnetic field strength timing information prediction model and based on the default AC current parameters, the charging magnetic field strength timing curve is constructed.

[0048] In one embodiment, the kth wireless charging device model is used as an index to search in a database (including data on the change of charging magnetic field strength over time when different wireless charging device models have different AC current parameters over time) to obtain AC current parameter time series record information and charging magnetic field strength time series record information. The AC current parameter time series record information includes data on the change of phase, frequency and amplitude over time, and each data contains a timestamp, thereby ensuring the consistency of the data in time.

[0049] Then, the time series record information of the AC current parameters after cleaning is used as the input feature, and the time series record information of the charging magnetic field strength is used as the label to form a training set. A model suitable for time series prediction is selected, such as a long short-term memory network (LSTM), and the selected model is trained using the training set. The model parameters are continuously adjusted through algorithms such as back propagation and gradient descent to optimize the model performance. Then, a part of the data that is not involved in the training is prepared as a test set to verify the generalization ability of the model. The model performance is evaluated using the test set, and common indicators include mean square error (MSE), root mean square error (RMSE), etc. According to the evaluation results, the model structure or hyperparameters are adjusted to improve the prediction accuracy. The default AC current parameters of the kth wireless charging device are obtained, and they are 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, the charging magnetic field strength time series information prediction model can be effectively constructed and utilized to optimize the charging process of the wireless charging device.

[0050] Further, after receiving the magnetic field adjustment instruction, the kth wireless charging device adjusts its own charging magnetic field control parameters with the goal of reducing interference with the existing charging magnetic field. The embodiment of the present application also includes: When the kth wireless charging device receives the magnetic field adjustment instruction, a three-phase current parameter of a power grid connected to the kth wireless charging device is obtained; Extracting the zero point of any phase of the three-phase current parameters of the power grid; Calculating a first timing relationship between the zero point and a first local clock signal of the kth wireless charging device; When the charging magnetic field is emitted, the timing is started, and when it is equal to a preset calibration period, a 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.

[0051] In a possible embodiment, when the kth wireless charging device receives the magnetic field adjustment instruction, the three-phase current parameters of the power grid connected to the kth wireless charging device are obtained, wherein the three-phase current parameters of the power grid include phase current, current phase, etc. Then, the zero point of any phase of the three-phase current parameters of the power grid is extracted, such as each zero point of the A-phase current.

[0052] Furthermore, the first timing relationship between the zero point and the first local clock signal of the kth wireless charging device is calculated, that is, the timing difference between the first local clock signal and the zero point. When the charging magnetic field is emitted, the timing starts. When the timing length is equal to the preset correction period (set by technicians in this field, such as 10 minutes, 15 minutes), the second timing relationship between the zero point and the second local clock signal of the kth wireless charging device is calculated, that is, the timing difference between the second local clock signal and the zero point. 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. In this way, the technical effect of correcting the local clock of the wireless charging device with the zero point of the power grid as the reference point to improve the accuracy and efficiency of collaborative charging is achieved.

[0053] In summary, the embodiments of the present application have at least the following technical effects: 1. By adjusting the magnetic field in an orderly manner, all wireless charging devices in the system can work in a coordinated manner, achieving the technical effect of improving the collaborative charging efficiency of multiple wireless charging devices.

[0054] 2. Allow each wireless charging device working in coordination to correct its own clock signal after working for a period of time, thereby improving the quality and efficiency of coordinated charging.

[0055] Embodiment 2, based on the same inventive concept as the method for collaborative charging of multiple wireless charging devices in the aforementioned embodiment, the present application provides a wireless charging system, the system comprising a central control unit and multiple wireless charging devices, wherein each wireless charging device has a charging magnetic field sensing component.

[0056] Further, preferably, the system includes a processor, a memory and a network interface. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database is used to store collaborative charging data. The network interface is used to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement a collaborative charging method for multiple wireless charging devices.

[0057] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0058] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

[0059] This specification and drawings are merely exemplary illustrations of the present application and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. A method for collaborative charging of multiple wireless charging devices, characterized in that: Applied to a wireless charging system, the system includes 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 of the multiple wireless charging devices, the N wireless charging devices are used to upload N location information of the electronic device to the central control unit respectively, wherein the total number of wireless charging devices ≥ N ≥ 1; Step 2: When the central control unit receives the N position information of the electronic device, based on the N position information of the electronic device, the N wireless charging devices are sorted from small to large according to the distance from the electronic device to obtain the first wireless charging device to the Nth wireless charging device; Step 3: Sending a standby instruction to the third wireless charging device until the Nth wireless charging device through the central control unit; Step 4: extracting the kth wireless charging device from the first wireless charging device to the Nth wireless charging device, and sending a magnetic field adjustment instruction to the kth wireless charging device through the central control unit, wherein the initial value of k is equal to 2; Step 5: After receiving the magnetic field adjustment instruction, 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 parameter adjustment of the k-th wireless charging device is completed and started, a charging magnetic field adjustment completion signal is returned to the central control unit. If k≥N, the process is stopped. If k<N, after updating the k value through k+1, return to step 4 to execute the loop.

2. The method according to claim 1, characterized in that Any wireless charging device has a charging magnetic field sensing component. After receiving the magnetic field adjustment instruction, the kth 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, wherein the charging magnetic field state information includes a charging magnetic field direction and a charging magnetic field strength time series curve, and the charging magnetic field direction and the charging magnetic field strength time series curve correspond to each other one by one; Obtaining a local charging magnetic field direction and a local charging magnetic field strength time series curve of the kth wireless charging device; According to the local charging magnetic field direction and the local charging magnetic field strength time series curve, a 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 a first magnetic field negative impact coefficient; When the first magnetic field negative impact coefficient is less than the magnetic field negative impact coefficient threshold, the local charging magnetic field direction and the local charging magnetic field strength timing curve are not adjusted, and the charging magnetic field adjustment is considered to be completed.

3. The method according to claim 2, characterized in that Also includes: When the first magnetic field negative impact coefficient is greater than or equal to the magnetic field negative impact coefficient threshold, updating the phase and / or frequency of the local charging magnetic field strength timing curve to obtain a first local charging magnetic field strength update timing curve; When the maximum charging magnetic field intensity of the first local charging magnetic field intensity update timing curve and the maximum charging magnetic field intensity of each of the charging magnetic field intensity timing curves do not appear at the same time, the kth wireless charging device is controlled according to the first local charging magnetic field intensity update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is considered to be completed; When the maximum charging magnetic field intensity of the first local charging magnetic field intensity update timing curve and the maximum charging magnetic field intensity of any one of the charging magnetic field intensity timing curves appear simultaneously, the phase and / or frequency of the first local charging magnetic field intensity update timing curve is updated.

4. The method according to claim 3, characterized in that Also includes: When the update times of the phase and / or frequency of the local charging magnetic field strength timing curve are greater than or equal to the preset update times and the charging magnetic field adjustment is still not completed, updating the amplitude of the local charging magnetic field strength timing curve to obtain a second local charging magnetic field strength update timing curve; According to the local charging magnetic field direction and the second local charging magnetic field strength timing curve, a magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field strength timing curve to obtain a second magnetic field negative impact coefficient; When the second magnetic field negative impact coefficient is less than the magnetic field negative impact coefficient threshold, the kth wireless charging device is controlled according to the second local charging magnetic field strength update timing curve and the local charging magnetic field direction, and the charging magnetic field adjustment is considered to be completed; When the second magnetic field negative impact coefficient is greater than or equal to the magnetic field negative impact coefficient threshold, the amplitude of the second local charging magnetic field strength update timing curve is updated.

5. The method according to claim 2, characterized in that Obtaining a local charging magnetic field direction and a local charging magnetic field strength time series curve of the kth wireless charging device, including: Obtaining electronic device location information of the kth wireless charging device, wherein the electronic device location information includes electronic device direction information; Setting the electronic device direction information to the charging magnetic field direction of the device; A charging magnetic field strength timing curve stored in association with a default alternating current parameter of the kth wireless charging device is obtained, and is set as the local charging magnetic field strength timing curve.

6. The method according to claim 5, characterized in that According to the local charging magnetic field direction and the local charging magnetic field strength timing curve, a magnetic field superposition loss calculation is performed in combination with the charging magnetic field direction and the charging magnetic field strength timing curve to obtain a first magnetic field negative impact coefficient, including: Traversing the charging magnetic field strength time series curve, and counting the average magnetic field strength at the kth wireless charging device; Extracting the charging magnetic field strength timing curve whose average magnetic field strength is greater than or equal to the magnetic field strength threshold, and adding it into the timing curve affecting the charging magnetic field strength; Extracting the influencing charging magnetic field direction affecting the charging magnetic field intensity timing curve from the charging magnetic field direction; According to the local charging magnetic field direction and the local charging magnetic field strength timing curve, a magnetic field superposition loss calculation is performed in combination with the influencing charging magnetic field direction and the influencing charging magnetic field strength timing curve to obtain a first magnetic field negative impact coefficient.

7. The method according to any one of claims 1 to 6, characterized in that: After receiving the magnetic field adjustment instruction, 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, further comprising: When the kth wireless charging device receives the magnetic field adjustment instruction, a three-phase current parameter of a power grid connected to the kth wireless charging device is obtained; Extracting the zero point of any phase of the three-phase current parameters of the power grid; Calculating a first timing relationship between the zero point and a first local clock signal of the kth wireless charging device; When the charging magnetic field is emitted, the timing is started, and when it is equal to a preset calibration period, a 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.

8. The method according to claim 6, characterized in that Obtaining a charging magnetic field strength timing curve associated with a default alternating current parameter of the kth wireless charging device, comprising: According to the kth wireless charging device model, collecting the time series recording information of the AC current parameter and the time series recording information of the charging magnetic field strength; Using the charging magnetic field strength time series record information as supervision and the AC current parameter time series record information as input, training a charging magnetic field strength time series information prediction model; According to the charging magnetic field strength timing information prediction model and based on the default AC current parameters, the charging magnetic field strength timing curve is constructed.

9. The method according to claim 2, characterized in that The charging magnetic field state information is collected through the charging magnetic field sensing component, wherein the charging magnetic field state information includes a charging magnetic field direction and a charging magnetic field strength timing curve, and the charging magnetic field direction and the charging magnetic field strength timing curve correspond to each other one by one, including: Utilizing the charging magnetic field induction component to receive a circumferential charging magnetic field from the kth wireless charging device, and determining the direction of the charging magnetic field according to the direction of the induced current formed in the charging magnetic field induction component; The charging magnetic field strength time series is recorded for the charging magnetic field direction to determine the charging magnetic field strength time series curve.

10. 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 9.

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