A wireless power transmission control method, device and wireless power transmission and reception system

Abstract

The present application relates to wireless charging technical field, especially a kind of wireless power transmission control method, equipment and wireless power transmitting-receiving system;Including steps: acquisition wireless power transmission equipment in standby state under the no-load Q value of coil;Continuously scan the real-time Q value of the coil, and capture the instantaneous Q value of the coil before wireless power transmission equipment sends PING when Q value changes;When wireless power transmission equipment and wireless power receiving equipment complete PING handshake, lock no-load Q value and instantaneous Q value, and start power output;When communication is interrupted, the current Q value of the coil is obtained, and the in-place state of wireless power receiving equipment is judged in combination with the locked no-load Q value, instantaneous Q value;If in place, maintain output;If remove, close output;Wireless power receiving equipment is judged in place by relying on the no-load Q value, instantaneous Q value and current Q value of the coil of wireless power transmission equipment, can avoid being misjudged to remove and shut down charging when wireless power receiving equipment is interrupted due to over-temperature protection communication.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and in particular to a wireless power transmission control method, device and wireless power transceiver system. Background Technology

[0002] When wireless power transmitters wirelessly charge small-capacity wearable devices such as TWS earphones and smartwatches, they typically rely on communication PING handshakes to detect device presence. When a device pauses charging due to temperature rise, it can easily be mistakenly identified as removed, causing the wireless power transmitter to shut down and charging to be interrupted. The industry-standard solution is to set a fixed-duration low-current forced output mode, which forcibly maintains output during this period regardless of whether the device is present or fully charged, to ensure that small-capacity devices are fully charged. However, this method requires manual activation by the user, which is cumbersome. Furthermore, using a fixed-duration forced constant-on mode, which continuously outputs regardless of whether the device is present, leads to high power consumption, excessive heat generation, and shortened battery life for the wireless power transmitter.

[0003] Therefore, designing a wireless power transmission control method, device, and wireless power transceiver system that can automatically identify and intelligently maintain charging is of great importance to those skilled in the art. Summary of the Invention

[0004] This invention provides a wireless power transmission control method, device, and wireless power transceiver system that can automatically identify and intelligently maintain charging, in order to solve the problems of cumbersome operation, high power consumption, high heat generation, and shortened battery life.

[0005] A wireless power transmission control method, applied to a wireless power transmission device, comprises the following steps:

[0006] The no-load Q value of the coil of the wireless power transmitting device in standby mode is collected; The real-time Q value of the coil of the wireless power transmitter is continuously scanned, and the instantaneous Q value of the coil of the wireless power transmitter before sending a PING is captured when the real-time Q value changes. After the wireless power transmitter and the wireless power receiver complete the PING handshake, the no-load Q value and instantaneous Q value of the coil of the wireless power transmitter are locked, and the power output of the wireless power transmitter is turned on. When communication between the wireless power transmitter and the wireless power receiver is interrupted, the current Q value of the coil of the wireless power transmitter is obtained, and the presence status of the wireless power receiver is determined based on the current Q value, the locked no-load Q value, and the instantaneous Q value. If the wireless power receiving device is in place, the output of the wireless power transmitting device is maintained; if the wireless power receiving device is removed, the output of the wireless power transmitting device is turned off.

[0007] Optionally, the following steps are also included: When the current Q value of the coil of the wireless power transmitting device does not change compared to the instantaneous Q value, it is determined that the wireless power receiving device is in place; When the current Q value of the coil of the wireless power transmitter is the no-load Q value, it is determined that the wireless power receiver has been removed.

[0008] Optionally, the following steps are also included: When the current Q value of the coil of the wireless power transmitter changes compared to the instantaneous Q value and is not equal to the no-load Q value, it is determined that the wireless power receiver is in place and that the wireless power receiver has been replaced. When the wireless power receiving equipment has been replaced, the instantaneous Q value of the coil of the wireless power transmitting equipment before sending a PING should be re-acquired.

[0009] Optionally, the following steps are also included: When the current Q value of the coil of the wireless power transmitter is the no-load Q value, a preset waiting time is delayed, and the current Q value of the coil of the wireless power transmitter is continuously collected within the preset waiting time. If the current Q value does not change within the preset waiting time, it is determined that the wireless power receiving device has been removed.

[0010] Optionally, the following steps are also included: If the current Q value changes within the preset waiting time, the delay ends, and the instantaneous Q value of the coil of the wireless power transmitter before sending the PING is reacquired.

[0011] Optionally, the following steps are also included: The no-load Q value of the coil of the wireless power transmitter is periodically refreshed during standby mode.

[0012] Optionally, the following steps are also included: During the charging process, monitor the PING communication status between the wireless power transmitter and the wireless power receiver. If PING communication is normal, the wireless power transmitting equipment will output power normally; if PING communication is interrupted, the presence status of the wireless power receiving equipment will be determined.

[0013] Optionally, the following steps are also included: After the wireless power transmitter turns off its power output, enable the low-power sleep mode of the wireless power transmitter.

[0014] To address the problems existing in the prior art, the present invention also provides a wireless power transmission device, the solution of which is used to implement the wireless power transmission control method described above, including a main control module, a wireless power transmission module, a coil, a power management module, a Q-value acquisition module, a delay judgment module, and an output control module. The input terminals of the main control module and the wireless power transmission module are both connected to the power management module, and the main control module and the wireless power transmission module are communicatively connected. The output terminal of the wireless power transmission control module is connected to the input terminal of the Q-value acquisition module, the output terminal of the Q-value acquisition module is connected to the input terminal of the delay judgment module, the output terminal of the delay judgment module is connected to the input terminal of the output control module, and the output terminal of the output control module is connected to the coil.

[0015] To address the problems existing in the prior art, the present invention also provides a wireless power transceiver system, characterized in that it includes a wireless power transmitting device and a wireless power receiving device as described above, wherein the wireless power transmitting device and the wireless power receiving device are electrically connected and connected via PING communication.

[0016] The beneficial effects of the wireless power transmission control method provided in this invention are as follows: By relying on the no-load Q value, instantaneous Q value, and current Q value of the coil of the wireless power transmitter to determine the presence status of the wireless power receiver from multiple dimensions, instead of solely relying on PING communication detection, the method effectively avoids the wireless power receiver being mistakenly removed due to communication interruption caused by over-temperature protection, preventing mid-charge shutdown and ensuring that small-capacity wireless power receivers such as TWS earphones and smartwatches can be fully charged normally; By automatically identifying the device placement and presence status, the method eliminates the need for users to manually switch to the low-current maintenance mode, achieving intelligent adaptive charging maintenance control, simplifying operation and improving user experience; By abandoning the traditional fixed-duration forced always-on mode, the method effectively reduces the no-load power consumption and overall heat generation of the wireless power transmitter, extending the battery life of the wireless power transmitter; By pre-locking the no-load Q value and instantaneous Q value and then comparing it with the current Q value, the method can suppress detection errors caused by the drift of coil temperature, voltage, and device parameters of the wireless power transmitter, significantly improving the accuracy and versatility of wireless power receiver presence identification, and can be adapted to multiple different terminals. Attached Figure Description

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 1 ; Figure 2 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 2 ; Figure 3 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 3 ; Figure 4 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 4 ; Figure 5 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 5 ; Figure 6 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 6 ; Figure 7 This is a flowchart of the wireless power transmission control method in this embodiment of the invention. Figure 7 ; Figure 8 This is a block diagram of the wireless power transmission device in an embodiment of the present invention; Figure 9 This is a block diagram of the wireless power transceiver system in an embodiment of the present invention.

[0018] The labels for the attached figures are as follows: 1. Main control module; 2. Wireless power transmission module; 3. Coil; 4. Power management module; 5. Q value acquisition module; 6. Delay judgment module; 7. Output control module; 10. Wireless power transmission equipment; 20. Wireless power receiving equipment. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1 to 7 As shown, the present invention provides a specific embodiment of a wireless power transmission control method.

[0021] A wireless power transmission control method, applied to a wireless power transmission device, referenced. Figure 1 The wireless power transmission control method includes the following steps: S1. Collect the no-load Q value of the coil of the wireless power transmitting device in standby mode; S2. Continuously scan the real-time Q value of the coil of the wireless power transmitter and capture the instantaneous Q value of the coil of the wireless power transmitter before sending a PING when the real-time Q value changes. S3. After the wireless power transmitter and the wireless power receiver complete the PING handshake, lock the no-load Q value and instantaneous Q value of the coil of the wireless power transmitter, and turn on the power output of the wireless power transmitter. S4. When communication between the wireless power transmitting device and the wireless power receiving device is interrupted, obtain the current Q value of the coil of the wireless power transmitting device, and determine the on-site status of the wireless power receiving device based on the current Q value, the locked no-load Q value, and the instantaneous Q value. S5. If the wireless power receiving device is in place, maintain the output state of the wireless power transmitting device; if the wireless power receiving device is removed, turn off the output of the wireless power transmitting device.

[0022] Specifically, the wireless power transmission control method achieves accurate on-site judgment of wireless power receiving devices without relying on a single PING communication by collecting, locking, monitoring in real time, and comparing the Q value of the coil of the wireless power transmitting device in stages, thereby completing the intelligent maintenance and shutdown control of wireless charging.

[0023] Step 1: After the wireless power transmitter is powered on, it enters a normal standby operating state. At this time, no foreign objects or wireless power receiving devices are placed above the coil of the wireless power transmitter, and the coil is in an unloaded state without any foreign objects or wireless power receiving devices. The wireless power transmitter samples and detects the quality factor of the coil, collects and records the corresponding no-load Q value of the coil under the no-load condition without any foreign objects or wireless power receiving devices, and stores this no-load Q value as a basic reference parameter for subsequent on-site judgment of the wireless power receiving device. This step is used to obtain and store the inherent Q value characteristics of the coil of the wireless power transmitter under no-load conditions, and establish a stable no-load reference standard. This provides a benchmark comparison basis for distinguishing the coil's no-load state from the load state after placing the wireless power receiving device, and establishes a parameter basis for subsequent on-site logic judgment.

[0024] Step 2: During the standby process of the wireless power transmitter, the Q-value of the coil of the wireless power transmitter is continuously scanned and detected, and the real-time Q-value of the coil is collected in real time. When a wireless power receiver is placed on the coil of the wireless power transmitter, it will cause a change in the Q-value of the coil of the wireless power transmitter. The collected real-time Q-value of the coil of the wireless power transmitter will change significantly. At this time, the wireless power transmitter will capture the Q-value of the coil at the moment of change and collect and store the Q-value of its coil at that moment as the instantaneous Q-value before initiating PING communication detection with the wireless power receiver. This step monitors the change in the Q-value state of the coil of the wireless power transmitter in real time through continuous scanning, which can promptly detect whether a wireless power receiver has been placed. By capturing and storing the instantaneous Q-value of the coil of the wireless power transmitter before the wireless power transmitter and the wireless power receiver PING handshake, the load characteristic parameters after the wireless power receiver is placed are formed. These parameters, together with the no-load Q-value, form two sets of comparable parameters, providing necessary parameter support for subsequent comprehensive judgment of the equipment's on-site status.

[0025] Step 3: After the wireless power transmitter and the placed wireless power receiver complete the PING communication handshake and establish a communication association, the previously collected and stored coil no-load Q value and instantaneous Q value are locked to prevent these two sets of Q values ​​from changing arbitrarily. At the same time, the wireless power transmitter turns on its power output and enters the normal charging state for the wireless power receiver. This step ensures that the reference parameters remain unchanged during subsequent judgment by locking the no-load Q value and instantaneous Q value, avoiding inaccurate judgment caused by parameter fluctuations. Simultaneously turning on the power output enables the normal start-up of the wireless power transmitter power supply after the communication handshake is completed.

[0026] Step 4: When communication between the wireless power transmitter and receiver is interrupted, obtain the current Q value of the coil of the wireless power transmitter; and retrieve the locked no-load Q value and instantaneous Q value. Compare the current Q value with the locked no-load Q value and instantaneous Q value respectively. Based on the parameter correspondence of the three, determine whether the wireless power receiver is still on the coil of the wireless power transmitter, thereby completing the identification of the wireless power receiver's presence status. This step obtains the current Q value of the coil of the wireless power transmitter when communication between the wireless power transmitter and receiver is interrupted, relies on the locked no-load Q value and instantaneous Q value of the coil, and combines the current Q value of the coil to comprehensively determine the presence status of the wireless power receiver. This step does not rely on additional judgment logic; it can accurately distinguish between the presence and removal status of the wireless power receiver using only the stored and real-time Q value parameters, improving the reliability of the wireless power receiver's presence determination.

[0027] Step 5: Based on the wireless power receiving device presence determination result obtained in the previous step, execute the corresponding control. That is, when it is determined that the wireless power receiving device is still in the present state, the wireless power transmitting device maintains the current output state; when it is determined that the wireless power receiving device has been removed from the coil of the wireless power transmitting device, the wireless power transmitting device shuts off its output in a timely manner. This step realizes adaptive power control based on the presence determination result. If the wireless power receiving device is in the present state, the wireless power transmitting device continues to supply power to ensure uninterrupted charging; if the wireless power receiving device is removed, the output of the wireless power transmitting device is shut off in a timely manner to avoid invalid no-load output loss, and to achieve precise linkage control between power output and device presence status.

[0028] In this embodiment, the standby no-load Q value of the coil of the wireless power transmitter is first collected and stored. The real-time Q value of the coil of the wireless power transmitter is continuously scanned, and the instantaneous Q value of the coil of the wireless power transmitter before PING is captured when the real-time Q value changes. After completing the PING handshake with the wireless power transmitter and the wireless power receiver, the two-level Q value reference is locked and the power output of the wireless power transmitter is turned on. When the communication between the wireless power transmitter and the wireless power receiver is interrupted, the device presence status is comprehensively judged by combining the locked no-load Q value, instantaneous Q value and the current Q value of the coil. The power output of the wireless power transmitter is intelligently maintained or turned off depending on whether the device is present. This effectively avoids the misjudgment problem caused by single PING communication detection. It can stably maintain the power output of the wireless power transmitter when the wireless power receiver is present, ensure continuous charging without interruption, and promptly turn off the output of the wireless power transmitter when the wireless power receiver is removed. This reduces the no-load power consumption and invalid heat generation of the wireless power transmitter, improves the intelligence of wireless charging control, the accuracy of presence judgment, and the overall battery life and user experience.

[0029] In one embodiment, reference Figure 2 The wireless power transmission control method also includes the following steps: S41. When the current Q value of the coil of the wireless power transmitting device does not change compared to the instantaneous Q value, it is determined that the wireless power receiving device is in place. S42. When the current Q value of the coil of the wireless power transmitting device is the no-load Q value, it is determined that the wireless power receiving device has been removed. S43. When the current Q value of the coil of the wireless power transmitting device changes compared to the instantaneous Q value and is not equal to the no-load Q value, it is determined that the wireless power receiving device is in place and that the wireless power receiving device has been replaced.

[0030] Step 41: Compare the current Q value of the coil of the wireless power transmitter obtained when communication between the wireless power transmitter and the wireless power receiver is interrupted with the pre-locked instantaneous Q value. If the two values ​​are consistent and there is no significant deviation, it is directly determined that the wireless power receiver is still placed on the charging coil and is in a stationary state. This step utilizes the consistency between the current Q value and the instantaneous Q value of the wireless power transmitter coil to quickly and intuitively determine that the device is in its original position. The judgment logic is simple and reliable, ensuring accurate judgment of the device's position under normal charging conditions.

[0031] Step 42: Compare the current Q value of the coil of the wireless power transmitter with the pre-acquired and locked no-load Q value; if the current Q value drops back and is equal to or close to the no-load Q value, it is determined that there is no wireless power receiving device above the coil of the wireless power transmitter, and the wireless power receiving device has been moved away from the charging position; this step uses the no-load Q value of the coil of the wireless power transmitter as the departure criterion, which can accurately identify the working condition of the device being completely removed, and provide an accurate judgment basis for timely shutting down the power output of the wireless power transmitter.

[0032] Step 43: The current Q value of the coil of the wireless power transmitter is compared with the locked instantaneous Q value and the no-load Q value. If the current Q value is significantly different from the instantaneous Q value and does not return to the no-load Q value level, it is determined that there is still a wireless power receiver on the coil of the wireless power transmitter, but it has been replaced with a different model or type of wireless power receiver. This step distinguishes three working conditions—wireless power receiver placed in place, wireless power receiver removed, and wireless power receiver in place but replaced—through two-level Q value interval comparison. This improves the ability to subdivide the in-place status and enhances the recognition adaptability and control integrity of the wireless power transmitter in the scenario of wireless power receiver replacement.

[0033] In this embodiment, the current Q value of the coil of the wireless power transmitter is compared with the locked instantaneous Q value and the no-load Q value. If the current Q value is unchanged from the instantaneous Q value, the wireless power receiver is determined to be in place. If the current Q value equals the no-load Q value, the wireless power receiver is determined to be removed. If the current Q value changes from the instantaneous Q value but is not equal to the no-load Q value, the wireless power receiver is determined to be in place and has been replaced. This allows for a fine distinction between three operating conditions: the wireless power receiver is in place, the wireless power receiver has been removed, and the wireless power receiver is in place but has been replaced. This improves the Q-value-based hierarchical in-place determination logic, enhances the accuracy and scenario adaptability of in-place identification, and enables the wireless power transmitter to accurately identify and match corresponding charging control strategies for different wireless current receiver states. This ensures continuous and stable charging, reasonable power consumption control, and further improves the overall intelligent control effect.

[0034] In one embodiment, reference Figure 3 The wireless power transmission control method also includes the following steps: S431. When the wireless power receiving equipment has been replaced, re-acquire the instantaneous Q value of the coil of the wireless power transmitting equipment before sending a PING.

[0035] Step 431: When it is determined that the wireless power receiving device is in place and has been replaced, the wireless power transmitting device re-detects the Q value of its coil, and re-acquires and updates the instantaneous Q value of the coil of the wireless power transmitting device before initiating PING communication. This step re-acquires and matches the instantaneous Q value of the new wireless power receiving device for the replacement condition of the wireless power receiving device, updates the in-place characteristic reference parameters, so that the in-place status can still be determined by the updated instantaneous Q value and the no-load Q value, adapts to the coil coupling characteristics of the replaced device, and ensures that the in-place judgment logic remains accurate and effective.

[0036] In this embodiment, after determining that the wireless power receiving device has been replaced, the instantaneous Q value of the coil of the wireless power transmitting device before sending the PING is re-acquired. This refreshes the reference parameters used for in-situ determination, enabling accurate in-situ identification to still be completed based on the no-load Q value, the updated instantaneous Q value, and the current Q value. This ensures that the wireless power transmitting control logic is continuously available and the discrimination standard is adapted to the new device in the scenario of replacing the wireless power receiving device, thereby improving the versatility and adaptability of the overall control method.

[0037] In one embodiment, reference Figure 4 The wireless power transmission control method also includes the following steps: S421. When the current Q value of the coil of the wireless power transmitting device is the no-load Q value, a preset waiting time is delayed, and the current Q value of the coil is continuously collected within the preset waiting time. S422. If the current Q value does not change within the preset waiting time, it is determined that the wireless power receiving device has been removed.

[0038] S423. If the current Q value changes within the preset waiting time, the delay ends, and the instantaneous Q value of the coil of the wireless power transmitter before sending the PING is reacquired.

[0039] Step 421: When the current Q value of the coil of the wireless power transmitter is detected to be equal to or close to the no-load Q value, the device is not immediately removed. Instead, a preset delay is initiated, and the current Q value of the coil of the wireless power transmitter is continuously collected throughout the preset waiting time. This step introduces a delay buffer and continuous sampling mechanism to avoid instantaneous misjudgment caused by instantaneous Q value fluctuations and slight interference, and to provide a buffer verification time for the removal determination of the wireless power receiver.

[0040] Step 422: If the current Q value of the coil continuously collected remains unchanged or does not change significantly within the preset waiting time, it is finally confirmed that the wireless power receiving device has been removed from the charging position. This step confirms the removal of the device by delaying continuous sampling before making a conclusion, which greatly reduces the probability of misjudgment caused by accidental Q value fluctuations and improves the reliability of the device removal determination.

[0041] Step 423: If a change in the current Q value of the coil is detected within the preset waiting time, the delay process is immediately terminated, and the instantaneous Q value of the coil of the wireless power transmitter before initiating the PING is reacquired. This step can identify the scenario where the device is briefly removed and then immediately put back, exit the delay in time, and recapture the new instantaneous Q value reference to adapt to the on-site judgment requirements after the device is put back, ensuring that the charging process can be automatically continued.

[0042] In this embodiment, when the current Q value of the coil of the wireless power transmitter reaches the no-load Q value, a preset waiting delay is set and the current Q value of the coil is continuously sampled. If the Q value does not change within the waiting time, the device is finally determined to be removed. If the Q value changes, the delay is terminated and the instantaneous Q value of the coil of the wireless power transmitter before the PING is re-acquired. By using delay verification and continuous sampling, false removal and false judgment caused by instantaneous parameter fluctuations are avoided. It can identify the scenario where the wireless power receiver briefly leaves and is then put back, and automatically refresh the reference parameters. It can adapt to the charging identification and control after the device is put back without manual intervention, effectively improving the anti-interference capability, discrimination accuracy and working condition adaptation completeness of the wireless power transmitter's presence judgment.

[0043] In one embodiment, reference Figure 5 The wireless power transmission control method also includes the following steps: S11. Periodically refresh the no-load Q value of the coil of the wireless power transmitter during the standby state of the wireless power transmitter.

[0044] Step 11: When the wireless power transmitter is in standby mode, the coil of the wireless power transmitter is detected according to a set period, and the stored no-load Q value of the coil is repeatedly collected and updated to realize the dynamic refresh of the no-load Q value. This step refreshes the no-load Q value of the coil periodically during the standby phase of the wireless power transmitter, adapting in real time to the slow deviation caused by ambient temperature, input voltage and the coil's own parameters, so that the no-load Q value always maintains the true reference, avoiding the judgment deviation caused by the reference solidification, and providing a stable and reliable reference standard for subsequent in-situ state comparison.

[0045] In this embodiment, by periodically refreshing the no-load Q value of the coil in the standby state of the wireless power transmitter, the detection deviation caused by temperature, voltage and device parameter drift can be dynamically compensated, so that the no-load Q value always maintains the reference level under the true no-load state, avoiding in-situ misjudgment caused by a fixed static reference, and ensuring long-term stability and reliability of multi-level comparison judgment based on no-load Q value, instantaneous Q value and current Q value, further improving the accuracy of in-situ identification, environmental adaptability and control stability of the wireless power transmitter.

[0046] In one embodiment, reference Figure 6 The wireless power transmission control method also includes the following steps: S44. During the charging process, monitor the PING communication status between the wireless power transmitter and the wireless power receiver; S45. If PING communication is normal, the wireless power transmitting equipment maintains normal power output; if PING communication is interrupted, the on-site status of the wireless power receiving equipment is determined.

[0047] Step 44: Throughout the entire charging process of the wireless power transmitting device, the wireless power receiving device continuously monitors the PING communication connection status between itself and the wireless power receiving device in real time; it keeps track of the connectivity of the wireless communication link in real time, providing a basis for communication status to execute different charging control logics in different scenarios, and realizing coordinated management and control of communication status and coil Q value detection.

[0048] Step 45: If PING communication remains normal, the wireless power transmitter maintains normal power output and operates according to the standard charging procedure. If PING communication is interrupted, the communication result is no longer relied upon; instead, the presence status of the wireless power receiver is determined by the coil Q value parameter. When communication is normal, the conventional charging mode is used to ensure a simple and efficient charging process. When communication is abnormally disconnected, the system automatically switches to the Q value presence judgment logic to avoid the defect of easily misjudging device removal by relying solely on PING communication, ensuring uninterrupted charging control and accurate judgment.

[0049] In this embodiment, the PING communication status between the wireless power transmitter and the wireless power receiver is monitored in real time during the charging process. When the PING communication is normal, the normal power output of the wireless power transmitter is maintained. When the PING communication is interrupted, the Q value is used to determine the presence status of the wireless power receiver. This achieves the linkage between communication detection and coil Q value physical detection. When the communication is intact, the charging proceeds stably according to the normal process. When the communication is interrupted for any reason, the Q value can still be used to accurately identify the actual presence of the device. This avoids the direct misjudgment of device removal due to communication disconnection and the shutdown of charging output. This effectively ensures that the charging of small-capacity wearable devices is uninterrupted and not easily incompletely charged, while improving the fault tolerance and operational stability of wireless charging control.

[0050] In one embodiment, reference Figure 7 The wireless power transmission control method also includes the following steps: S51. After turning off the power output of the wireless power transmitter, enable the low-power sleep mode of the wireless power transmitter.

[0051] Step 51: After determining that the wireless power receiving device has been removed and its power output has been turned off, the wireless power transmitting device actively switches its working state, starts and enters the low-power sleep mode of the whole machine. By entering sleep management in a timely manner after stopping charging output, the standby power consumption and heat generation of the wireless power transmitting device can be reduced, thus reducing power consumption.

[0052] In this embodiment, after the power output of the wireless power transmitter is turned off, the low-power sleep mode of the wireless power transmitter is activated. This allows the wireless power transmitter to enter a low-power operating state in a timely manner after the removal of the wireless power receiving device and the cessation of charging output. This effectively reduces idle standby power consumption and overall heat loss, extends the battery life of the wireless power transmitter, and improves the closed-loop control logic of the complete operating conditions, thereby enhancing the energy efficiency and intelligent management level of the wireless power transmitter.

[0053] like Figure 8 As shown, the present invention also provides a specific embodiment of a wireless power transmission device.

[0054] A wireless power transmitting device is provided for implementing the aforementioned wireless power transmitting control method, with reference to... Figure 8 The wireless power transmission device includes a main control module 1, a wireless power transmission module 2, a coil 3, a power management module 4, a Q-value acquisition module 5, a delay judgment module 6, and an output control module 7. The input terminals of the main control module 1 and the wireless power transmission module 2 are both connected to the power management module 4. The main control module 1 and the wireless power transmission module 2 are communicatively connected. The output terminal of the wireless power transmission module 2 is connected to the input terminal of the Q-value acquisition module 5. The output terminal of the Q-value acquisition module 5 is connected to the input terminal of the delay judgment module 6. The output terminal of the delay judgment module 6 is connected to the input terminal of the output control module 7. The output terminal of the output control module 7 is connected to the coil 3.

[0055] Specifically, the input terminals of the main control module 1 and the wireless power transmission module 2 are both electrically connected to the power management module 4, and are powered by the power management module 4. A communication connection is established between the main control module 1 and the wireless power transmission module 2 to realize command interaction and status synchronization. The output terminal of the wireless power transmission module 2 is connected to the input terminal of the Q value acquisition module 5, which is used to issue detection control commands and cooperate to complete the acquisition of the Q value signal of the coil 3. The output terminal of the Q value acquisition module 5 is connected to the input terminal of the delay judgment module 6, which transmits the acquired Q value parameters of the coil 3 to the delay judgment module 6 for in-situ logic and delay verification judgment. The output terminal of the delay judgment module 6 is connected to the input terminal of the output control module 7, which outputs the in-situ judgment and delay confirmation results. The output terminal of the output control module 7 is connected to the charging coil 3, which regulates the opening, maintenance or closing of the wireless power transmission power of the coil 3 according to the received control signal.

[0056] like Figure 9 As shown, the present invention also provides a specific embodiment of a wireless power transceiver system.

[0057] A wireless power transceiver system, reference Figure 9 It includes a wireless power transmitter 10 and a wireless power receiver 20. The wireless power transmitter 10 and the wireless power receiver 20 are electrically connected and connected via PING communication. After the wireless power transmitter 10 and the wireless power receiver 20 complete the PING handshake, the wireless power transmitter 10 transmits power to the wireless power receiver 20.

[0058] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A wireless power transmission control method, applied to a wireless power transmission device, characterized in that, Includes the following steps: The no-load Q value of the coil of the wireless power transmitting device in standby mode is collected; The real-time Q value of the coil of the wireless power transmitter is continuously scanned, and the instantaneous Q value of the coil of the wireless power transmitter before sending a PING is captured when the real-time Q value changes. After the wireless power transmitter and the wireless power receiver complete the PING handshake, the no-load Q value and instantaneous Q value of the coil of the wireless power transmitter are locked, and the power output of the wireless power transmitter is turned on. When communication between the wireless power transmitter and the wireless power receiver is interrupted, the current Q value of the coil of the wireless power transmitter is obtained, and the presence status of the wireless power receiver is determined based on the current Q value, the locked no-load Q value, and the instantaneous Q value. If the wireless power receiving device is in place, the output status of the wireless power transmitting device is maintained; If the wireless power receiving device is removed, the output of the wireless power transmitting device will be turned off.

2. The wireless power transmission control method according to claim 1, characterized in that, It also includes the following steps: When the current Q value of the coil of the wireless power transmitting device does not change compared to the instantaneous Q value, it is determined that the wireless power receiving device is in place; When the current Q value of the coil of the wireless power transmitter is the no-load Q value, it is determined that the wireless power receiver has been removed.

3. The wireless power transmission control method according to claim 1, characterized in that, It also includes the following steps: When the current Q value of the coil of the wireless power transmitter changes compared to the instantaneous Q value and is not equal to the no-load Q value, it is determined that the wireless power receiver is in place and that the wireless power receiver has been replaced. When the wireless power receiving equipment has been replaced, the instantaneous Q value of the coil of the wireless power transmitting equipment before sending a PING should be re-acquired.

4. The wireless power transmission control method according to claim 2, characterized in that, It also includes the following steps: When the current Q value of the coil of the wireless power transmitter is the no-load Q value, a preset waiting time is delayed, and the current Q value of the coil of the wireless power transmitter is continuously collected within the preset waiting time. If the current Q value does not change within the preset waiting time, it is determined that the wireless power receiving device has been removed.

5. The wireless power transmission control method according to claim 4, characterized in that, It also includes the following steps: If the current Q value changes within the preset waiting time, the delay ends, and the instantaneous Q value of the coil of the wireless power transmitter before sending the PING is reacquired.

6. The wireless power transmission control method according to claim 1, characterized in that, It also includes the following steps: The no-load Q value of the coil of the wireless power transmitter is periodically refreshed during standby mode.

7. The wireless power transmission control method according to claim 1, characterized in that, It also includes the following steps: During the charging process, monitor the PING communication status between the wireless power transmitter and the wireless power receiver. If PING communication is normal, the wireless power transmitting equipment will output power normally; if PING communication is interrupted, the presence status of the wireless power receiving equipment will be determined.

8. The wireless power transmission control method according to claim 1, characterized in that, It also includes the following steps: After the wireless power transmitter shuts down its output, enable the low-power sleep mode of the wireless power transmitter.

9. A wireless power transmitting device, characterized in that, The method for implementing the wireless power transmission control method as described in any one of claims 1-8 includes a main control module, a wireless power transmission module, a coil, a power management module, a Q-value acquisition module, a delay judgment module, and an output control module. The input terminals of the main control module and the wireless power transmission module are both connected to the power management module, and the main control module and the wireless power transmission module are communicatively connected. The output terminal of the wireless power transmission control module is connected to the input terminal of the Q-value acquisition module, the output terminal of the Q-value acquisition module is connected to the input terminal of the delay judgment module, the output terminal of the delay judgment module is connected to the input terminal of the output control module, and the output terminal of the output control module is connected to the coil.

10. A wireless power transceiver system, characterized in that, It includes the wireless power transmitting device and the wireless power receiving device as described in claim 9, wherein the wireless power transmitting device and the wireless power receiving device are electrically connected and connected via PING communication.

Images