Wireless charging control method, device, system and vehicle

Abstract

The application discloses a wireless charging control method, device, system and vehicle, comprising: monitoring the sensor signal of a preset holding area of a vehicle steering wheel, determining whether the user's holding of the steering wheel is valid according to the sensor signal, when it is determined that the holding is valid, coupling the curved surface transmitting coil in the preset holding area with the curved surface receiving coil in the device to be charged, and performing wireless charging on the device to be charged. The application effectively triggers power compensation when the holding is valid, adopts a curved surface coil fitting design, realizes accurate power compensation of the vehicle on the miniaturized device, improves the wireless charging efficiency, triggers wireless charging power compensation by using the high-frequency holding scene of the steering wheel, does not need manual operation of the user, realizes full-process non-inductive power compensation, and further improves the user experience.

Description

Technical Field

[0001] This application belongs to the field of vehicle charging technology, specifically relating to a wireless charging control method, device, system, and vehicle. Background Technology

[0002] With the rapid development of smart cars and wearable devices, the small built-in battery capacity of miniature wearable devices has made battery life a key bottleneck restricting their widespread application.

[0003] Currently, the main charging methods for micro wearable devices include the following: One method involves the user removing the wearable device and charging it via a dedicated charging dock or magnetic charging cable. This method requires the user to actively remove the wearable device and place it on a specific charging device, which is cumbersome and the wearable device cannot be used during charging, resulting in a poor user experience. Another method involves setting up a universal wireless charging area inside the vehicle, such as a wireless charging pad on the center console, where the user places the wearable device to recharge.

[0004] However, universal wireless charging pads in vehicles are typically designed to charge larger devices such as mobile phones, with a large transmitting coil area. In contrast, the receiving coil of miniature wearable devices is tiny. This size mismatch leads to low coupling efficiency and slow charging speed. Furthermore, users need to manually remove the wearable device and place it on the charging pad, making it impossible to achieve seamless charging while driving, which affects charging efficiency and, consequently, user experience. Summary of the Invention

[0005] The purpose of this application is to provide a wireless charging control method, device, system, and vehicle that can solve the problems of using a universal vehicle wireless charging pad to charge wearable devices, which requires manual operation by the user and results in low coupling efficiency and slow charging speed due to the size mismatch between the charging pad and the wearable device.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a wireless charging control method applied to a vehicle, the method comprising: Sensor signals that monitor the preset grip area of ​​the vehicle's steering wheel; Based on the sensor signals, determine whether the user's grip on the steering wheel is effective; When a valid grip is established, the curved transmitting coil in the preset grip area is coupled to the curved receiving coil in the device to be charged to wirelessly charge the device.

[0007] Optionally, the step of wirelessly charging the device to be charged includes: Once a valid hold is confirmed, a power replenishment command is issued. In response to the power charging permission command, it is detected whether the device to be charged is within the charging coupling range of the curved transmitting coil; If so, control the curved transmitting coil to output electrical energy so that the curved receiving coil of the device to be charged can receive and transmit it to the battery for charging.

[0008] Optionally, the method further includes: Receive power information fed back by the device to be charged via radio frequency carrier communication; Based on the preset correspondence between power range and output power, the target output power corresponding to the power range in which the power information is located is determined. A full-bridge circuit for driving the curved transmitting coil is used for phase-shift control or frequency modulation control to adjust the output power of the curved transmitting coil to the target output power.

[0009] Optionally, the method further includes: When the power information indicates that the device to be charged is fully charged, the power transistor in the full-bridge circuit used to drive the curved transmitting coil is disconnected, and wireless charging of the device to be charged is stopped.

[0010] Optionally, determining whether the user's grip on the steering wheel is effective based on the sensor signal includes: Acquire the human skin capacitance signal, human body temperature signal, and wireless charging back electromotive force signal of the preset gripping area; When the human skin capacitance signal, human body temperature signal, and wireless charging back electromotive force signal meet the preset grip conditions, the user's grip on the steering wheel is determined to be a valid grip.

[0011] Optionally, the method further includes: During the wireless charging process of the device to be charged, the sensor signals of the preset holding area are monitored. When the sensor signal determines that the user's grip on the steering wheel is invalid, the wireless charging of the device to be charged is interrupted.

[0012] Optionally, after the wireless charging of the device to be charged is interrupted, the following steps are included: Monitor the sensor signals of the preset gripping area; When the sensor signal determines that the user's grip on the steering wheel is valid, wireless charging of the device to be charged is resumed.

[0013] Secondly, embodiments of this application provide a wireless charging control device applied to a vehicle, the device comprising: The first monitoring module is used to monitor sensor signals in the preset grip area of ​​the vehicle's steering wheel; The first determining module is used to determine whether the user's grip on the steering wheel is effective based on the sensor signal; The first charging module is used to wirelessly charge the device to be charged by coupling the curved transmitting coil in the preset holding area with the curved receiving coil in the device to be charged when the grip is determined to be valid.

[0014] Thirdly, embodiments of this application provide a wireless charging control system, the system comprising a vehicle and a device to be charged, including: The vehicle includes a first charging controller, a curved transmitting coil, and a sensor. The curved transmitting coil is embedded in a preset grip area of ​​the vehicle's steering wheel, conforming to the curved surface of the preset grip area, and coupled to the curved receiving coil of the device to be charged. The sensor is disposed in the preset grip area and is used to collect sensor signals. The first charging controller is connected to the curved transmitting coil and the sensor respectively, and is used to determine whether the user's grip on the steering wheel is valid based on the sensor signal. When it is determined to be a valid grip, the curved transmitting coil in the preset grip area is coupled to the curved receiving coil in the device to be charged to wirelessly charge the device to be charged. The device to be charged includes a second charging controller, a curved receiving coil, and a battery. The curved receiving coil is embedded in the outer surface of the housing of the device to be charged, fits against the curved surface of the housing, and is coupled to the curved transmitting coil of the steering wheel. The second charging controller is connected to the curved receiving coil and the battery respectively, and is used to transmit the received electrical energy to the battery and collect power information to feed back to the first charging controller.

[0015] Fourthly, embodiments of this application provide a vehicle that implements the steps of the wireless charging control method as described in the first aspect.

[0016] This application provides a wireless charging control method that monitors sensor signals from a preset gripping area of ​​a vehicle's steering wheel. Based on these signals, it determines whether the user's grip on the steering wheel is valid. When a valid grip is confirmed, a curved transmitting coil in the preset gripping area couples with a curved receiving coil in the device to be charged, thus wirelessly charging the device. This application accurately determines the user's gripping state on the steering wheel using multiple sensor signals. Valid grip detection triggers charging, achieving efficient and accurate wireless charging and avoiding energy waste. The curved coil fitting design ensures precise coupling between the curved receiving coil of the device to be charged and the curved transmitting coil in the steering wheel gripping area, enabling precise charging of miniaturized devices. Adapting to the curved coils of both the device to be charged and the steering wheel shortens the transmission distance and significantly improves the coil coupling coefficient, thereby enhancing wireless charging efficiency. Utilizing the high-frequency gripping scenario of the steering wheel to trigger wireless charging eliminates the need for manual operation by the user, naturally completing charging under valid grip conditions, improving charging efficiency, achieving seamless charging throughout, and further enhancing the user experience.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a flowchart illustrating the steps of a wireless charging control method provided in an embodiment of this application; Figure 2 This is a schematic diagram of the installation of the curved transmitting coil in a wireless charging control method provided in an embodiment of this application. Figure 1 ; Figure 3 This is a schematic diagram of the installation of the curved transmitting coil in a wireless charging control method provided in an embodiment of this application. Figure 2 ; Figure 4 This is a schematic diagram of the installation of the curved receiving coil in a wireless charging control method provided in an embodiment of this application; Figure 5 This is a schematic flowchart of a wireless charging control method provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a wireless charging control device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a wireless charging control device system provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The wireless charging control method, device, system, and vehicle provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0022] Reference Figure 1 This document illustrates a flowchart of the steps of a wireless charging control method provided in an embodiment of this application, applicable to a vehicle. The method may include: Step 101: Monitor the sensor signal of the preset grip area of ​​the vehicle steering wheel.

[0023] In this embodiment, to address the issues of manual operation required when using a universal vehicle wireless charging pad to charge micro wearable devices, and the resulting size mismatch between the charging pad and the wearable device leading to low coupling efficiency and the inability to achieve seamless charging during driving, thus affecting charging efficiency and user experience, this embodiment adapts a curved coil for charging the device to be charged to the grip area of ​​the vehicle's steering wheel. The curved coil on the device side is arranged close to the outer side, precisely coupling with the curved transmitting coil in the steering wheel grip area, achieving miniaturized, precise, and seamless charging. A curved FPC (Flexible Printed Circuit) coil can be used, which is formed on a flexible printed circuit board using an etching process to create spiral or ring-shaped copper foil lines, serving as the transmitting or receiving coil for wireless charging. In this embodiment, the curved FPC coil can be replaced with other curved coils, customized into an arc-shaped groove structure according to the inner curvature of the device to be charged. The coil size can be adapted and adjusted according to the steering wheel size of different vehicle models and the specifications of the device to be charged, which will not be elaborated upon here.

[0024] It should be noted that the device to be charged in this application embodiment can be a miniature wearable device, specifically referring to a small, wearable smart electronic device with wireless charging receiving capability, including but not limited to smart rings, smart bracelets, smartwatches, smart rings, or smart sensor patches. The device to be charged typically has a built-in rechargeable battery and a wireless charging receiving coil, receiving electrical energy through electromagnetic induction or magnetic coupling resonance. Those skilled in the art should understand that as long as the wearable device has a suitable rechargeable battery and wireless charging receiving coil, the wireless charging solution of this application can be applied.

[0025] In one specific embodiment of this application, a smart ring is used as an example of a micro wearable device, i.e., a device to be charged. In this embodiment, a first charging controller is configured on the steering wheel of the vehicle. Specifically, the vehicle end includes a first charging controller, a curved transmitting coil, and a sensor. The curved transmitting coil is embedded in a preset grip area of ​​the vehicle steering wheel, conforming to the curved surface of the preset grip area, and coupled to the curved receiving coil of the device to be charged, i.e., the smart ring. The sensor is disposed in the preset grip area for collecting sensor signals. The first charging controller is connected to the curved transmitting coil and the sensor respectively. For example, see [reference needed]. Figure 2 This illustration shows the installation diagram of the curved transmitting coil in a wireless charging control method provided in an embodiment of this application. Figure 1 The preset grip areas are the 3 o'clock and 9 o'clock positions where the driver naturally grips the steering wheel during normal driving. Two curved transmitting coils are embedded in the 3 o'clock and 9 o'clock grip positions on the steering wheel, respectively. Figure 3 This illustration shows the installation diagram of the curved transmitting coil in a wireless charging control method provided in an embodiment of this application. Figure 2 The curved surface of the transmitting coil is completely aligned with the curved surface of the steering wheel grip area, covering only the grip area.

[0026] In this embodiment, to address the short battery life issue of micro wearable devices and achieve seamless charging of wearable devices by the vehicle, sensors positioned in a preset grip area detect the user's grip state. This triggers wireless charging using high-frequency grip scenarios, eliminating the need for manual operation and allowing for seamless and natural charging of the device while the user is driving or holding the steering wheel. The first charging controller monitors sensor signals from the preset grip area of ​​the vehicle's steering wheel. This area integrates various types of sensors, including capacitive sensors and infrared temperature sensors. The capacitive sensors are mounted on the surface or inner side of the preset grip area and arranged in parallel with a curved transmitting coil. The infrared temperature sensor is arranged alongside the capacitive sensors in the preset grip area to collect different physical signals characterizing the user's grip state. These sensor signals include human skin capacitance signals, human body temperature signals, and wireless charging back electromotive force signals.

[0027] Step 102: Determine whether the user's grip on the steering wheel is effective based on the sensor signals.

[0028] In this embodiment, the sensor signals include human skin capacitance signals, human body temperature signals, and wireless charging back electromotive force signals. Based on the monitored multiple sensor signals, the system accurately determines whether the user's grip on the steering wheel is valid through joint judgment of multiple signals. Specifically, the system acquires human skin capacitance signals, human body temperature signals, and wireless charging back electromotive force signals. Only when all three meet their respective preset grip conditions is the grip considered valid, thus effectively distinguishing between the user's genuine grip and unnecessary accidental touches, and activating wireless charging only when truly needed.

[0029] Step 103: When it is determined to be a valid grip, the curved transmitting coil in the preset grip area is coupled with the curved receiving coil in the device to be charged to wirelessly charge the device.

[0030] In this embodiment, the device to be charged includes a second charging controller, a curved receiving coil, and a battery. The curved receiving coil is embedded in the outer surface of the device's housing, conforming to the curved surface of the housing, and coupled to the curved transmitting coil of the steering wheel. When a valid grip is determined, wireless charging is performed on the device by coupling the curved transmitting coil in the preset grip area with the curved receiving coil in the device.

[0031] In this embodiment, in order to achieve accurate and safe wireless charging of the device to be charged and effectively avoid ineffective charging, energy waste and electromagnetic radiation, a charging permission command is issued after the device is determined to be held effectively. In response to the charging permission command, it is first detected whether the device to be charged is within the charging coupling range of the curved transmitting coil. If so, the curved transmitting coil is controlled to output electrical energy so that the curved receiving coil of the device to be charged can receive and transmit it to the battery for charging.

[0032] Among them, reference Figure 4 This illustration shows a schematic diagram of the installation of a curved receiving coil in a wireless charging control method provided in this application. Taking a smart ring as an example, the curved receiving coil is embedded in the outer surface of the smart ring's shell, fitting snugly against the curved surface of the shell, and coupled to the curved transmitting coil of the steering wheel. The smart ring uses ceramic or other materials that do not generate eddy current losses as the ring shell, which has a ring structure. The curved receiving coil is embedded tightly against the outer side of the shell, completely fitting the curvature of the shell. A second charging controller is located on the side of the curved receiving coil and connected to it. The second charging controller includes a wireless charging resonant compensation network, a rectifier filter circuit, a wireless charging main control chip, and sampling and protection circuits, etc. The smart ring's micro energy storage battery is connected to the second charging controller, serving to store electrical energy for the smart ring.

[0033] The wireless charging control method provided in this application monitors sensor signals from a preset gripping area of ​​the vehicle's steering wheel. Based on these signals, it determines whether the user's grip on the steering wheel is valid. When a valid grip is confirmed, the curved transmitting coil in the preset gripping area couples with the curved receiving coil in the device to be charged, thus wirelessly charging the device. This application accurately determines the user's gripping state on the steering wheel using multiple sensor signals. Valid grip detection triggers charging, achieving efficient and accurate wireless charging and avoiding energy waste. The curved coil fitting design ensures precise coupling between the curved receiving coil of the device to be charged and the curved transmitting coil in the steering wheel gripping area, enabling precise charging of miniaturized devices. Adapting to the curved coils of both the device to be charged and the steering wheel shortens the transmission distance and significantly improves the coil coupling coefficient, thereby enhancing wireless charging efficiency. Utilizing the high-frequency gripping scenario of the steering wheel to trigger wireless charging eliminates the need for manual user operation, naturally completing charging under valid grip conditions, improving charging efficiency, achieving seamless charging throughout, and further enhancing the user experience.

[0034] In some embodiments of this application, step 103, which involves wirelessly charging the device to be charged, may specifically include the following steps: S11, when a valid grip is confirmed, issue a power replenishment command; S12, in response to the power charging permission command, detects whether the device to be charged is within the charging coupling range of the curved transmitting coil; S13, if so, control the curved transmitting coil to output electrical energy so that the curved receiving coil of the device to be charged can receive and transmit it to the battery for charging.

[0035] In this embodiment of the application, in order to achieve accurate and safe wireless charging of the device to be charged and effectively avoid ineffective charging, energy waste and electromagnetic radiation, a charging permission command is issued after the device is determined to be held effectively. In response to the charging permission command, it is first detected whether the device to be charged is within the charging coupling range of the curved transmitting coil. If so, the curved transmitting coil is controlled to output electrical energy so that the curved receiving coil of the device to be charged can receive and transmit it to the battery for charging.

[0036] In this embodiment, after valid grip determination is completed, the valid grip signal is transmitted to the first charging controller. Upon receiving the signal, the first charging controller generates and sends a charging permission command to the charging control unit within the first charging controller. Upon receiving the charging permission command, the charging control unit performs a device-to-be-charged presence detection, checking whether the device is within the charging coupling range of the curved transmitting coil. It should be noted that impedance detection or communication detection can be used. For example, under low-power excitation, the transmitting coil detects impedance changes. When the receiving coil of the device is close, due to mutual inductance, the equivalent impedance of the transmitting coil undergoes a measurable change. Alternatively, the transmitting coil emits a short handshake signal. If the device receives and returns an acknowledgment signal, it indicates that the device is within the coupling range, thus confirming that the device is physically in a rechargeable position. This avoids invalid charging when there is a grip but no ring, ensuring that electrical energy can be effectively received.

[0037] In this embodiment, the second charging controller for the device to be charged includes a wireless charging resonant compensation network, a rectifier and filter circuit, a wireless charging main control chip, and sampling and protection circuits. A micro-energy storage battery is connected to the second charging controller to store electrical energy for the device to be charged. The first charging controller's energy replenishment control unit controls the curved transmitting coil to start and output electrical energy. This output is then received by the curved receiving coil of the device to be charged and transmitted to the battery for charging. The curved transmitting coil electromagnetically couples with the curved receiving coil on the outer surface of the device to be charged, and the DC output is transmitted to the micro-energy storage battery for charging via the resonant compensation network and rectifier and filter circuit. The operating frequency and output power of the transmitting coil are dynamically adjusted by the first charging controller based on subsequent feedback; these details are not elaborated here.

[0038] The curved surface fitting design of the transmitting coil and receiving coil in this embodiment shortens the transmission distance and improves the coupling coefficient, replenishing the micro energy storage battery of the device to be charged and realizing efficient wireless transmission of power from the steering wheel end to the device to be charged.

[0039] In some embodiments of this application, the method may further include the following steps: S21, Receive power information fed back by the device to be charged via radio frequency carrier communication; S22, based on the preset correspondence between power range and output power, determine the target output power corresponding to the power range where the power information is located; S23 employs a full-bridge circuit for driving the curved surface transmitting coil to perform phase-shift control or frequency modulation control, adjusting the output power of the curved surface transmitting coil to the target output power.

[0040] In this embodiment, the device to be charged collects its own power information in real time and feeds it back to the first charging controller on the steering wheel via radio frequency carrier communication. The first charging controller on the steering wheel receives the power information fed back by the device to be charged and adjusts the output power of the curved transmitting coil according to the power information. Specifically, the first charging controller on the steering wheel receives the power information fed back by the device to be charged and adjusts the output power of the curved transmitting coil according to the power information. Based on the received power information of the device to be charged and according to the preset correspondence between power range and output power, a full-bridge circuit for driving the curved transmitting coil is used for phase shift control or frequency modulation control to dynamically adjust the output power of the curved transmitting coil, ensuring the efficiency, safety and intelligence of the charging process.

[0041] It should be noted that both the device to be charged and the steering wheel integrate communication modules, employing the NFC WLC (NFC Wireless Charging) standard to achieve bidirectional communication via radio frequency carrier transmission and reception. Battery information refers to data fed back from the device to be charged to the steering wheel, characterizing the device's current energy storage status and related charging parameters, which may include the current battery percentage. During wireless charging, the second charging controller on the device to be charged monitors the current battery level of the micro-energy storage battery in real time, which can be determined through battery voltage, remaining capacity percentage, etc., and sends this information to the first charging controller on the steering wheel via radio frequency carrier communication. The first charging controller on the steering wheel receives the battery information fed back from the device to be charged via radio frequency carrier communication.

[0042] As a specific implementation of this application embodiment, during wireless charging, the smart ring collects its own power information in real time and feeds it back to the first charging controller on the steering wheel via radio frequency carrier communication. Based on the received power information from the smart ring, the first charging controller on the steering wheel uses a full-bridge circuit to drive the curved transmitting coil for phase-shift control or frequency modulation control, according to a preset correspondence between power range and output power, to dynamically adjust the output power of the curved transmitting coil, ensuring efficient, safe, and intelligent charging. In this embodiment, in addition to wireless charging via electromagnetic induction, a reverse communication link is established between the smart ring and the steering wheel to feed back data such as the smart ring's power information to the steering wheel in real time. This allows the steering wheel to adjust its output power and determine whether the smart ring is fully charged based on the power information. The smart ring and the steering wheel use the NFC WLC standard to achieve bidirectional communication via radio frequency carrier transmission and reception.

[0043] In this embodiment, data transmission is performed using a wireless charging coupling channel, eliminating the need for an additional communication chip in the device being charged. This reduces the size and cost of the device, and power information can be sent periodically in the form of data packets, ensuring that the steering wheel can monitor the power status of the device in real time. Using radio frequency carrier communication fully utilizes existing wireless charging physical channels. Furthermore, radio frequency carrier communication features low latency and high reliability, meeting the requirements for real-time power adjustment.

[0044] In this embodiment, based on a preset correspondence between battery capacity ranges and output power, the target output power corresponding to the battery capacity range in which the battery information is located is determined. After receiving the battery capacity information fed back by the device to be charged, the first charging controller at the steering wheel end determines the preset range in which the current battery capacity is located, and determines the target output power corresponding to the range according to the preset correspondence. The preset correspondence between battery capacity ranges and output power can be set according to charging needs. The preset correspondence between battery capacity ranges and output power is used for segmented charging. By reasonably setting the range thresholds and corresponding power values, the ideal charging curve can be approximated, achieving fast charging while ensuring battery health.

[0045] In the specific implementation, a full-bridge circuit used to drive the curved transmitting coil is employed for phase-shift control or frequency modulation control to adjust the output power of the curved transmitting coil to the target output power. After determining the target output power, the first charging controller controls the full-bridge circuit used to drive the curved transmitting coil, employing phase-shift control or frequency modulation control to adjust the actual output power of the transmitting coil to the target output power. The device being charged provides real-time feedback on its battery level, and the steering wheel dynamically adjusts its output power based on this feedback. Through phase-shift control or frequency modulation control of the full-bridge circuit, smooth adjustment of the output power is achieved, rather than abrupt changes. This avoids the current surge to the rectifier filter circuit and battery at the device being charged, reducing the risk of circuit damage.

[0046] It should be noted that the full-bridge circuit consists of four power transistors (MOSFETs or IGBTs) used to invert the DC power supplied by the vehicle's low-voltage battery into high-frequency AC power, driving the curved transmitting coil to generate an alternating magnetic field. Phase-shift control adjusts the power by controlling the conduction phase difference between the two sets of diagonal power transistors in the full-bridge circuit. When both sets of power transistors conduct simultaneously, the output power is maximum; when they conduct alternately, the output power is minimum. By changing the phase shift angle, the output power is continuously adjusted. Frequency modulation control changes the operating frequency of the full-bridge circuit driving the transmitting coil, utilizing the frequency characteristics of the resonant network to alter the output power. When the operating frequency equals the resonant frequency of the coil and the compensation capacitor, the output power is maximum; when the operating frequency deviates from the resonant frequency, the output power decreases. By increasing or decreasing the operating frequency, the output power is adjusted. When the battery level is low, it quickly replenishes power with higher power; when it is close to full charge, it switches to trickle charging mode, avoiding damage to the battery from overcharging and prolonged high-power charging, effectively extending the lifespan of the device being charged.

[0047] Based on the correspondence between preset power range and output power, the embodiments of this application accurately and quickly adjust the output power of the transmitting coil, realizing refined charging management of the device to be charged. The charging power matches the actual needs of the device to be charged, avoiding energy waste and improving charging efficiency.

[0048] In some embodiments of this application, the method may further include the following steps: S31, when the power information indicates that the device to be charged is fully charged, the power transistor in the full-bridge circuit used to drive the curved transmitting coil is disconnected, and wireless charging of the device to be charged is stopped.

[0049] In this embodiment, when the received power information indicates that the device to be charged is fully charged, the first charging controller stops wireless charging of the device. Specifically, it disconnects the power transistors in the full-bridge circuit driving the curved transmitting coil, thus stopping wireless charging. By controlling the full-bridge circuit used to drive the curved transmitting coil to turn off all the power transistors, no alternating current flows through the transmitting coil, thereby stopping the generation of the alternating magnetic field and immediately terminating the wireless charging process, achieving intelligent charging control.

[0050] In this embodiment, when the device to be charged is fully charged, the power transistor in the full-bridge circuit used to drive the curved transmitting coil is disconnected, and charging is quickly stopped. This avoids irreversible damage to the smart ring battery caused by overcharging, and realizes intelligent and automatic wireless charging control of the vehicle for the device to be charged.

[0051] In some embodiments of this application, step 102, determining whether the user's grip on the steering wheel is effective based on sensor signals, may specifically include the following steps: S41, acquire the human skin capacitance signal, human body temperature signal and wireless charging back electromotive force signal of the preset grip area; S42, when the human skin capacitance signal, human body temperature signal and wireless charging back electromotive force signal meet the preset grip conditions, determine that the user's grip on the steering wheel is a valid grip.

[0052] In this embodiment, based on the monitored signals from multiple sensors, the system accurately determines whether the user's grip on the steering wheel is valid through joint judgment of multiple signals. Specifically, it acquires human skin capacitance signal, human body temperature signal, and wireless charging back electromotive force signal. Only when all three meet their respective preset grip conditions is the grip considered valid, thereby effectively distinguishing between the driver's actual grip and unnecessary accidental touches, and activating wireless charging only when truly needed.

[0053] In this embodiment, multiple types of sensors are integrated in the preset grip area of ​​the steering wheel. These sensors may include capacitive sensors and infrared temperature sensors. The capacitive sensors are installed on the surface or inner side of the preset grip area of ​​the steering wheel and are arranged in parallel with the curved transmitting coil. A coupling capacitance is formed between the human skin and the sensor electrodes, and the capacitance value changes with the contact area and distance, thus collecting the human skin capacitance signal. The infrared temperature sensor is arranged in parallel with the capacitive sensors in the preset grip area. The infrared sensor detects the thermal radiation energy radiated by the human body and collects the human body temperature signal. The wireless charging back electromotive force signal uses the curved transmitting coil itself as a detection element. When a human hand approaches the transmitting coil, the electromagnetic characteristics of the human body change the impedance of the coil, causing a change in the back electromotive force. When the change in back electromotive force exceeds a preset threshold, it indicates that a living organism is approaching.

[0054] In this embodiment, when the human skin capacitance signal, human body temperature signal, and wireless charging back electromotive force signal meet the preset grip conditions, the user's grip on the steering wheel is determined to be an effective grip. The preset grip condition corresponding to the human skin capacitance signal is that if the capacitance value is within the preset human body capacitance range, such as 100pF-500pF, then sufficient area and pressure of skin contact are confirmed. The preset grip condition corresponding to the human body temperature signal is that the temperature value is within the range of 36℃ to 37.5℃, confirming that the contact object is a living human body with normal body temperature, thus excluding non-living objects. The preset grip condition corresponding to the wireless charging back electromotive force signal is that the change in back electromotive force exceeds a preset threshold, such as 20%, confirming that the human hand is within the effective coupling range of the transmitting coil.

[0055] In some embodiments, a pressure sensor and a heart rate sensor can also be used to determine whether the user's grip on the steering wheel is effective. The pressure sensor detects the grip force, and the heart rate sensor detects the heart rate signal through green / red light. If the grip pressure exceeds a threshold such as 5N and a regular heart rate waveform is detected, it is determined to be an effective grip. These details will not be elaborated here.

[0056] This embodiment utilizes multi-signal joint detection to comprehensively determine the gripping state from three completely different physical dimensions: contact characteristics, vital signs, and electromagnetic characteristics. Any misjudgment in a single dimension will be corrected by the other dimensions, thus improving the accuracy and reliability of grip detection.

[0057] In some embodiments of this application, the method may further include: S51 monitors sensor signals in a preset gripping area during the wireless charging process of the device to be charged. S52, when the sensor signal determines that the user's grip on the steering wheel is invalid, the wireless charging of the device to be charged is interrupted.

[0058] In this embodiment, during wireless charging, the user may temporarily release the steering wheel due to normal driving behaviors such as shifting gears, turning, adjusting seating position, or resting. If the wireless charging function continues to operate at this time, it will not only cause unnecessary power consumption, but may also generate unnecessary electromagnetic radiation because the transmitting coil works without load after the user's hands are removed. Therefore, through a dynamic interruption mechanism, the sensor signal of the preset grip area is continuously monitored during the charging process. When it is determined that the grip becomes invalid, the wireless charging is immediately interrupted, thereby ensuring that the charging function only operates when the user effectively grips the steering wheel, thus realizing intelligent charging control.

[0059] In this embodiment, during the wireless charging process of the device to be charged, sensor signals in a preset gripping area are monitored to provide real-time data on changes in the gripping state. When the monitoring result indicates that the gripping state changes from an effective gripping state to an ineffective gripping state, an interruption operation is immediately executed to stop the wireless charging of the device to be charged. The charging interruption can be achieved by disconnecting the power transistor in the full-bridge circuit driving the curved surface transmitting coil, thereby stopping the wireless charging of the device to be charged.

[0060] This application embodiment uses a dynamic interruption mechanism to interrupt wireless charging in a timely manner based on changes in the user's grip state during the charging process, thereby ensuring that the charging function only operates when the user is effectively holding the steering wheel, thus achieving intelligent charging control.

[0061] In some embodiments of this application, step S52, after interrupting the wireless charging of the device to be charged, may specifically include the following steps: S53, monitors sensor signals in the preset grip area; S54, when the sensor signal determines that the user's grip on the steering wheel is valid, resume wireless charging of the device to be charged.

[0062] In this embodiment, after charging is interrupted, the sensor signal of the preset grip area continues to be monitored. When the user is detected to be gripping the steering wheel again, wireless charging of the device to be charged is immediately and automatically resumed, ensuring that the charging function is seamlessly connected after the user grips the wheel again, thus realizing intelligent and closed-loop control of wireless charging.

[0063] In this embodiment, after wireless charging is interrupted, the first charging controller enters a standby monitoring state. After the interruption, it continuously or periodically monitors the sensor signals of the preset grip area on the steering wheel, providing real-time data for the restoration of the grip state. Since the transmitting coil is in a non-current state after the interruption (i.e., the power transistor is disconnected), it is impossible to obtain the back electromotive force (EMF) signal by detecting the impedance change of the transmitting coil during charging. Therefore, a brief, low-power excitation pulse can be intermittently applied to the transmitting coil to detect the back EMF change and obtain the back EMF signal. Thus, when the human skin capacitance signal, human body temperature signal, and wireless charging back EMF signal meet the preset grip conditions, it is determined that the user's grip on the steering wheel is valid.

[0064] In this embodiment, when the monitoring result indicates that the user has effectively regained control of the steering wheel, a charging resumption operation is immediately performed, resuming and restarting wireless charging of the device to be charged. By maintaining the communication link in standby mode or using a fast reconnection mechanism, millisecond-level charging recovery speeds can be achieved.

[0065] To facilitate understanding of the wireless charging control method provided in the embodiments of this application by those skilled in the art, please refer to... Figure 5This document illustrates a flowchart of a wireless charging control method provided in an embodiment of this application. Specifically, initially, a valid grip detection phase is initiated. Sensor signals determine whether the user's grip on the steering wheel is valid. If valid, a pre-charging verification phase is initiated; otherwise, the valid grip detection phase continues. During the pre-charging verification phase, a first charging controller sends a charging permission command to the charging control unit. Wireless charging is then performed within the charging coupling range of the curved transmitting coil on the steering wheel, where the device to be charged is located. During charging, the output power of the curved transmitting coil is dynamically adjusted based on the real-time power information of the device to be charged, and the power information of the device to be charged is monitored in real time. The system determines whether the device to be charged is fully charged based on the user's grip on the steering wheel, or whether the user's grip on the steering wheel is invalid. If so, wireless charging is stopped. Otherwise, the output power of the curved transmitting coil is dynamically adjusted based on the real-time power information of the device to be charged. After stopping wireless charging, the first charging controller enters the power recovery phase, which determines whether the user's grip on the steering wheel has been updated to a valid grip. If so, it enters the power pre-verification phase, where the first charging controller sends a power allow command to the power control unit and performs wireless charging within the charging coupling range of the curved transmitting coil on the steering wheel. Otherwise, wireless charging ends.

[0066] Reference Figure 6 This illustration shows a structural schematic diagram of a wireless charging control device provided in an embodiment of this application, applied to a vehicle. The device includes: The first monitoring module 201 is used to monitor sensor signals in the preset grip area of ​​the vehicle's steering wheel; The first determining module 202 is used to determine whether the user's grip on the steering wheel is effective based on the sensor signal; The first charging module 203 is used to wirelessly charge the device to be charged by coupling the curved transmitting coil in the preset holding area with the curved receiving coil in the device to be charged when it is determined to be a valid grip.

[0067] Optionally, the first charging module 203 includes: The sending submodule is used to send a power replenishment command when a valid grip is determined. The detection submodule is used to detect whether the device to be charged is within the charging coupling range of the curved transmitting coil in response to the power replenishment command. The control submodule is used, if so, to control the curved transmitting coil to output electrical energy so that the curved receiving coil of the device to be charged can receive and transmit the energy to the battery for charging.

[0068] Optionally, the device further includes: The receiving module is used to receive the power information fed back by the smart ring through radio frequency carrier communication; The second determining module is used to determine the target output power corresponding to the power range in which the power information is located, based on a preset correspondence between power range and output power. The second charging module is used to perform phase-shift control or frequency modulation control using a full-bridge circuit for driving the curved surface transmitting coil, so as to adjust the output power of the curved surface transmitting coil to the target output power.

[0069] Optionally, the device further includes: The third charging module is used to disconnect the power transistor in the full-bridge circuit that drives the curved transmitting coil when the power information indicates that the device to be charged is fully charged, thereby stopping the wireless charging of the device to be charged.

[0070] Optionally, the first determining module 202 includes: The acquisition submodule is used to acquire the human skin capacitance signal, human body temperature signal and wireless charging back electromotive force signal of the preset gripping area; The determination submodule is used to determine that the user's grip on the steering wheel is valid when the human skin capacitance signal, human body temperature signal and wireless charging back electromotive force signal meet the preset grip conditions.

[0071] Optionally, the device further includes: The second monitoring module is used to monitor the sensor signals of the preset holding area during the wireless charging process of the device to be charged. The interrupt charging module is used to interrupt wireless charging of the device to be charged when the sensor signal determines that the user's grip on the steering wheel is invalid.

[0072] Optionally, the device further includes: The third monitoring module is used to monitor the sensor signals of the preset gripping area; The charging recovery module is used to resume wireless charging of the device to be charged when the sensor signal determines that the user's grip on the steering wheel is valid.

[0073] The wireless charging control device provided in this application embodiment can realize the various processes of the wireless charging control method in the above embodiments of this application. To avoid repetition, it will not be described again here.

[0074] The wireless charging control device provided in this application monitors sensor signals from a preset gripping area of ​​the vehicle's steering wheel. Based on these signals, it determines whether the user's grip on the steering wheel is valid. When a valid grip is detected, the device wirelessly charges itself by coupling a curved transmitting coil in the preset gripping area with a curved receiving coil in the device to be charged. This application accurately determines the user's gripping state on the steering wheel using multiple sensor signals. Valid grip detection triggers charging, achieving efficient and accurate wireless charging and avoiding energy waste. The curved coil fitting design ensures precise coupling between the curved receiving coil of the device to be charged and the curved transmitting coil in the steering wheel gripping area, enabling precise charging of miniaturized devices. Adapting to the curved coils of both the device to be charged and the steering wheel shortens the transmission distance and significantly improves the coil coupling coefficient, thereby enhancing wireless charging efficiency. Utilizing the high-frequency gripping scenario of the steering wheel to trigger wireless charging eliminates the need for manual operation by the user, naturally completing charging under valid grip conditions, improving charging efficiency, achieving seamless charging throughout, and further enhancing the user experience.

[0075] Reference Figure 7 This diagram illustrates a wireless charging control system according to an embodiment of this application. The system includes a vehicle and a device to be charged, comprising: The vehicle includes a first charging controller, a curved transmitting coil, and a sensor. The curved transmitting coil is embedded in a preset grip area of ​​the vehicle's steering wheel, conforming to the curved surface of the preset grip area, and coupled to the curved receiving coil of the smart ring. The sensor is located in the preset grip area and is used to collect sensor signals. The first charging controller is connected to the curved transmitting coil and the sensor respectively, and is used to determine whether the user's grip on the steering wheel is valid based on the sensor signal. When it is determined to be a valid grip, the curved transmitting coil in the preset grip area is coupled to the curved receiving coil in the device to be charged to wirelessly charge the device to be charged. The device to be charged includes a second charging controller, a curved receiving coil, and a battery. The curved receiving coil is embedded in the outer surface of the housing of the device to be charged, fits against the curved surface of the housing, and is coupled to the curved transmitting coil of the steering wheel. The second charging controller is connected to the curved receiving coil and the battery respectively, and is used to transmit the received electrical energy to the battery and collect power information to feed back to the first charging controller.

[0076] The wireless charging control system provided in this application can realize the various processes implemented by the wireless charging control method in the above embodiments of this application. To avoid repetition, it will not be described again here.

[0077] In another embodiment provided in this application, a vehicle is also provided that implements any of the wireless charging control methods described in the above embodiments.

[0078] In another embodiment provided in this application, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements any of the wireless charging control methods described in the above embodiments.

[0079] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0081] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A wireless charging control method, characterized in that, Applied to vehicles, the method includes: Sensor signals that monitor the preset grip area of ​​the vehicle's steering wheel; Based on the sensor signals, determine whether the user's grip on the steering wheel is effective; When a valid grip is established, the curved transmitting coil in the preset grip area is coupled to the curved receiving coil in the device to be charged to wirelessly charge the device.

2. The method according to claim 1, characterized in that, The wireless charging of the device to be charged includes: Once a valid hold is confirmed, a power replenishment command is issued. In response to the power charging permission command, it is detected whether the device to be charged is within the charging coupling range of the curved transmitting coil; If so, control the curved transmitting coil to output electrical energy so that the curved receiving coil of the device to be charged can receive and transmit it to the battery for charging.

3. The method according to claim 1, characterized in that, The method further includes: Receive power information fed back by the device to be charged via radio frequency carrier communication; Based on the preset correspondence between power range and output power, the target output power corresponding to the power range in which the power information is located is determined. A full-bridge circuit for driving the curved transmitting coil is used for phase-shift control or frequency modulation control to adjust the output power of the curved transmitting coil to the target output power.

4. The method according to claim 3, characterized in that, The method further includes: When the power information indicates that the device to be charged is fully charged, the power transistor in the full-bridge circuit used to drive the curved transmitting coil is disconnected, and wireless charging of the device to be charged is stopped.

5. The method according to claim 1, characterized in that, The step of determining whether the user's grip on the steering wheel is effective based on the sensor signal includes: Acquire the human skin capacitance signal, human body temperature signal, and wireless charging back electromotive force signal of the preset gripping area; When the human skin capacitance signal, human body temperature signal, and wireless charging back electromotive force signal meet the preset grip conditions, the user's grip on the steering wheel is determined to be a valid grip.

6. The method according to claim 1, characterized in that, The method further includes: During the wireless charging process of the device to be charged, the sensor signals of the preset holding area are monitored. When the sensor signal determines that the user's grip on the steering wheel is invalid, the wireless charging of the device to be charged is interrupted.

7. The method according to claim 6, characterized in that, After the wireless charging of the device to be charged is interrupted, the following is included: Monitor the sensor signals of the preset gripping area; When the sensor signal determines that the user's grip on the steering wheel is valid, wireless charging of the device to be charged is resumed.

8. A wireless charging control device, characterized in that, Applied to vehicles, the device includes: The first monitoring module is used to monitor sensor signals in the preset grip area of ​​the vehicle's steering wheel; The first determining module is used to determine whether the user's grip on the steering wheel is effective based on the sensor signal; The first charging module is used to wirelessly charge the device to be charged by coupling the curved transmitting coil in the preset holding area with the curved receiving coil in the device to be charged when the grip is determined to be valid.

9. A wireless charging control system, characterized in that, The system includes a vehicle and a device to be charged, including: The vehicle includes a first charging controller, a curved transmitting coil, and a sensor. The curved transmitting coil is embedded in a preset grip area of ​​the vehicle's steering wheel, conforming to the curved surface of the preset grip area, and coupled to the curved receiving coil of the device to be charged. The sensor is disposed in the preset grip area and is used to collect sensor signals. The first charging controller is connected to the curved transmitting coil and the sensor respectively, and is used to determine whether the user's grip on the steering wheel is valid based on the sensor signal. When it is determined to be a valid grip, the curved transmitting coil in the preset grip area is coupled to the curved receiving coil in the device to be charged to wirelessly charge the device to be charged. The device to be charged includes a second charging controller, a curved receiving coil, and a battery. The curved receiving coil is embedded in the outer surface of the housing of the device to be charged, fits against the curved surface of the housing, and is coupled to the curved transmitting coil of the steering wheel. The second charging controller is connected to the curved receiving coil and the battery respectively, and is used to transmit the received electrical energy to the battery and collect power information to feed back to the first charging controller.

10. A vehicle, characterized in that, The vehicle implements the wireless charging control method as described in any one of claims 1 to 7.

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