Vehicle-mounted wireless charging device and method, and vehicle

Abstract

The application discloses a kind of vehicle-mounted wireless charging device, method and vehicle, including sensor, clamping device, drive mechanism, control unit;Wherein, sensor is used to detect the position information and size information of mobile phone placed on wireless charging cover plate;Clamping device is movably arranged around wireless charging cover plate, for clamping and fixing mobile phone;Drive mechanism is connected with clamping device, for driving clamping device to move;Charging coil assembly is arranged below wireless charging cover plate;Control unit is electrically connected with sensor, drive mechanism and charging coil assembly, for calculating the best alignment position of mobile phone and charging coil assembly according to position information and size information, and controlling drive mechanism to drive clamping device to move to the best alignment position to clamp mobile phone.The application overcomes the defects of coil misplacement, low charging efficiency, large heat generation and poor compatibility for old mobile phones in the prior art vehicle-mounted wireless charging.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology, and in particular to an in-vehicle wireless charging device, method, and vehicle. Background Technology

[0002] With the widespread adoption of wireless charging technology for mobile phones, in-vehicle wireless charging has become a standard feature in automobiles. However, existing in-vehicle wireless charging systems generally suffer from a technical problem: when a user places their phone in the charging pad, the receiving coil inside the phone is prone to misalignment with the transmitting coil inside the charging pad. This misalignment leads to decreased electromagnetic coupling efficiency, increased energy transmission loss, resulting in slower charging speed, lower charging efficiency, and even overheating of the charging pad and the phone.

[0003] Existing technologies for improving alignment accuracy primarily focus on software and electronic aspects. Examples include using Bluetooth or sensors to detect position and guide the user to move the phone to align with the charging area, or dynamically selecting the active coil using multi-coil arrays and complex algorithms. While these technologies offer some improvement, they cannot completely solve the problems of low charging efficiency and overheating of the phone, and they also have poor compatibility with older phone models. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes an in-vehicle wireless charging device, method, and vehicle. It overcomes the shortcomings of existing in-vehicle wireless charging technologies, such as coil misalignment, low charging efficiency, high heat generation, and poor compatibility with older mobile phones. By employing a physical forced alignment mechanism, it achieves precise alignment between the mobile phone and the charging coil, significantly improving wireless charging efficiency while also offering good versatility and user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an in-vehicle wireless charging device, including a wireless charging cover and a charging coil assembly, and further including: a sensor, a clamping device, a driving mechanism, and a control unit; The sensor is used to detect the position and size information of the mobile phone placed on the wireless charging cover; the clamping device is movably disposed around the wireless charging cover for clamping and fixing the mobile phone; the driving mechanism is connected to the clamping device for driving the clamping device to move; the charging coil assembly is disposed below the wireless charging cover; the control unit is electrically connected to the sensor, the driving mechanism and the charging coil assembly, for calculating the optimal alignment position between the mobile phone and the charging coil assembly based on the position and size information, and controlling the driving mechanism to drive the clamping device to move to the optimal alignment position to clamp the mobile phone.

[0006] In a further technical solution, the sensor is disposed on the back of the wireless charging cover, wherein the sensor includes a pressure sensor, an infrared sensor, or a capacitive sensor.

[0007] In a further technical solution, the clamping device includes at least two sets of clamping mechanisms, the cross-section of which is L-shaped, U-shaped, or inverted T-shaped.

[0008] In a further technical solution, the driving mechanism includes a first driving component and a second driving component. The first driving component is used to drive the clamping mechanism to move along a first direction, and the second driving component is used to drive the clamping mechanism to move along a second direction that intersects with the first direction.

[0009] In a further technical solution, the driving mechanism is mechanically connected to the clamping device through a transmission mechanism, wherein the driving mechanism includes a stepper motor or a servo motor, and the transmission mechanism includes a gear, worm gear, and worm shaft.

[0010] A further technical solution also includes a housing; the control unit, charging coil assembly and drive mechanism are all disposed inside the housing, and a cooling fan is provided inside the housing.

[0011] In a further technical solution, the control unit stores a mobile phone model database, which contains charging coil location information corresponding to various mobile phone models.

[0012] In a second aspect, the present invention provides an in-vehicle wireless charging method, based on an in-vehicle wireless charging device according to any one of the first aspects, comprising: The system detects the position and size of a mobile phone placed on the wireless charging cover using sensors; calculates the optimal alignment between the mobile phone and the charging coil assembly based on the position and size information; controls the drive mechanism to move the clamping device to the optimal alignment position; clamps the mobile phone using the clamping device to fix it in the optimal alignment position; and wirelessly charges the mobile phone using the charging coil assembly.

[0013] Thirdly, the present invention provides a vehicle including a memory and a processor, and computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform a multi-mode array-based automotive emotion sensing method as described in any of the first aspects.

[0014] Fourthly, the present invention provides a computer program product comprising executable instructions stored in a computer-readable storage medium; wherein, when a vehicle's processor reads and executes the executable instructions from the computer-readable storage medium, it completes the vehicle-mounted wireless charging method described in any of the second aspects.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses physical alignment to achieve millimeter-level precision in coil alignment, fundamentally reducing energy transmission loss and significantly improving charging efficiency. It also effectively reduces heat generation on the phone and charging pad during charging, enhancing charging safety and stability. This invention is independent of the phone's hardware or protocols and is applicable to all wireless charging phones supporting Qi and other standard protocols. It also has excellent compatibility with older phone models, solving the compatibility issues of existing technologies. This invention enables rapid "place and charge, high-efficiency charging" operation. Users do not need to manually adjust the phone's position; the system automatically completes precise alignment and clamping, simplifying operation and greatly improving the user experience. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of a vehicle-mounted wireless charging device according to the present invention; Figure 2 This is a top view comparison diagram of the clamping mechanism of the present invention in the open and clamped states; Figure 3 This is a block diagram illustrating the working principle of the present invention; Among them, 1. Wireless charging cover; 2. Clamping device; 3. Charging coil assembly; 4. Circuit board assembly; 5. Housing; 2.1 Clamping mechanism; 2.2 First gear worm gear; 2.3 First stepper motor; 2.4 Second gear worm gear; 2.5 Second stepper motor. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0020] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0021] Terminology Explanation: Wireless charging cover: refers to a support panel used to place a mobile phone, with sensors on its back to detect the phone's placement status. In this invention, the surface of the wireless charging cover has marking areas to guide the user to place the phone in the approximately correct position.

[0022] Clamping device: refers to a physical constraint mechanism composed of movable mechanical limiting blocks, which fixes the phone in a designated position by applying constraint force from the side or corner of the phone. The clamping device is made of non-metallic materials to avoid interfering with electromagnetic fields.

[0023] Optimal alignment position: This refers to the spatial position of the phone when the transmitting coil of the phone's built-in receiving coil and charging coil assembly achieves the optimal electromagnetic coupling state. At this position, electromagnetic coupling efficiency is highest and energy transmission loss is minimal.

[0024] Coil alignment accuracy: refers to the deviation between the center of the mobile phone receiving coil and the center of the charging transmitting coil. This invention, through a physically forced alignment mechanism, can control the coil alignment accuracy to the millimeter level. The higher the accuracy, the higher the electromagnetic coupling efficiency and the higher the charging efficiency.

[0025] MCU (Microcontroller Unit): A miniature control chip that integrates a processor, memory, and input / output interfaces to execute charging control logic. In this invention, the MCU stores a database of mobile phone models and is responsible for calculating the optimal alignment position and controlling the drive mechanism.

[0026] Phone model database: This refers to the database stored in the MCU, containing charging coil location information for various phone models. The database can be updated regularly via OTA to ensure compatibility with newly released phones.

[0027] OTA (Over-The-Air): refers to the technology of remotely updating device software or data via a wireless network. In this invention, OTA is used to update the mobile phone model database, ensuring that the system can always recognize the latest mobile phone models and provide the best charging performance.

[0028] Example 1 Existing in-vehicle wireless charging systems commonly suffer from coil misalignment issues. When a user places their phone in the charging pad, the phone's built-in receiving coil is highly susceptible to misalignment with the charging pad's transmitting coil. This leads to decreased electromagnetic coupling efficiency, increased energy transfer loss, slower charging speed, lower charging efficiency, and can even cause the charging pad and phone to overheat.

[0029] Existing solutions for improving alignment accuracy mainly focus on the software and electronic levels, including two typical approaches: The first approach involves location detection via Bluetooth or sensors, followed by voice prompts or screen displays guiding the user to manually move the phone to align it with the charging area. This approach relies on active user input, and the phone is prone to shifting due to vibrations from moving vehicles, resulting in a poor user experience.

[0030] The second approach involves using a multi-coil array combined with a complex algorithm to dynamically select the active coil. While this approach can adapt to changes in the phone's position to some extent, it increases system complexity and cost, has poor compatibility with older phone models, and still cannot fundamentally guarantee precise coil alignment.

[0031] The core flaw of existing technologies lies in the fact that current methods cannot physically constrain the phone's position. Under conditions such as vehicle vibration, sudden braking, and turning, the phone is prone to shifting or sliding, leading to fluctuations in charging efficiency or even interruption of charging. Furthermore, existing methods are dependent on phone hardware or communication protocols, resulting in poor compatibility with older phone models that do not support specific protocols.

[0032] Based on this, this embodiment proposes an in-vehicle wireless charging device that physically constrains the mobile phone to the optimal charging position through a movable clamping device, fundamentally solving the coil misalignment problem.

[0033] like Figure 1 As shown in the figure, the vehicle-mounted wireless charging device proposed in this embodiment includes: a shell, a wireless charging cover, a charging coil assembly, a sensor, a clamping device, a driving mechanism, and a control unit.

[0034] like Figure 1 As shown, the wireless charging cover 1 serves as the carrier surface for the mobile phone. Its surface has a marking area, which can be achieved by means of silk screen printing, laser engraving, or luminous LED light strips, to guide the user to place the mobile phone in the approximately correct position.

[0035] In one embodiment, the wireless charging cover 1 can be arranged at an angle, with the tilt angle ranging from 15° to 45°, preferably 30°, to facilitate the user's observation of the mobile phone screen while driving.

[0036] Sensors are arranged on the back of the wireless charging cover 1. The sensors are used to detect the position and size information of the mobile phone placed on the wireless charging cover 1.

[0037] Sensors include pressure sensors, infrared sensors, or capacitive sensors.

[0038] Pressure sensors: Multiple pressure sensors are arranged at various locations on the back of the wireless charging cover 1 to determine the placement position and size of the mobile phone by detecting the pressure distribution at each point. The pressure sensors can be resistive, capacitive, or piezoelectric sensors. In one embodiment, a 4×4 array of 16 pressure sensors can be arranged on the back of the wireless charging cover 1. After the mobile phone is placed, the center position coordinates and external dimensions of the mobile phone are calculated based on the pressure values ​​of each sensor.

[0039] Infrared sensors: Arranged around the perimeter of the wireless charging cover 1, these sensors determine the position and size of the phone by emitting infrared light and receiving reflected light. The infrared sensors can be paired with infrared emitters and receivers. In one embodiment, a pair of infrared sensors can be arranged at each of the four edges of the wireless charging cover 1 to determine the phone's position and size by measuring the duration and extent of infrared light obstruction.

[0040] Capacitive sensor: Located on the back of the wireless charging cover 1, it determines the position and size of the phone by detecting changes in capacitance. The capacitive sensor utilizes the influence of the phone's body on the electric field; when the phone is placed, the capacitance value changes, and the position and size of the phone are determined based on the distribution of this capacitance change.

[0041] The sensor is electrically connected to the circuit board assembly 4 via an FPC cable, and sends the collected mobile phone location and size information to the MCU control unit for processing.

[0042] In one specific embodiment, a pressure sensor and a capacitance sensor can be used simultaneously, and the detection accuracy and reliability can be improved by fusing the data from the two sensors.

[0043] like Figure 2 As shown, the clamping device is movably disposed around the wireless charging cover for clamping and fixing the mobile phone. The clamping device 2 includes at least two sets of clamping mechanisms 2.1. Depending on the spatial layout differences of different vehicle models, one, two or more sets of clamping devices can be symmetrically arranged.

[0044] In this embodiment, the clamping device 2 includes two sets of clamping mechanisms 2.1, respectively arranged on opposite sides of the wireless charging cover 1, for applying constraint forces from the left and right sides of the mobile phone. In another embodiment, the clamping device 2 may include four sets of clamping mechanisms 2.1, respectively arranged at the four corners of the wireless charging cover 1, for applying constraint forces from the four corners of the mobile phone simultaneously, providing a more stable clamping effect.

[0045] The clamping mechanism 2.1 is made of a non-metallic material, such as PP (polypropylene), ABS (acrylonitrile-butadiene-styrene copolymer), or PC (polycarbonate). The purpose of using a non-metallic material is to avoid interference from metallic materials with the electromagnetic field during wireless charging, ensuring that charging efficiency is not affected. In a preferred embodiment, the clamping mechanism 2.1 is made of the same PP material as the vehicle interior trim, ensuring both functionality and visual consistency with the vehicle interior.

[0046] The cross-section of the clamping mechanism 2.1 can be L-shaped, U-shaped, or inverted T-shaped. Different cross-sectional shapes are suitable for different clamping methods: L-shaped cross section: suitable for limiting the phone from the side. One arm of the L-shape abuts against the side of the phone, and the other arm abuts against the bottom or top of the phone, forming a constraint in two directions.

[0047] U-shaped cross section: suitable for limiting the position of a mobile phone from the corner. The two arms of the U shape abut against the two adjacent sides of the mobile phone to form a corner constraint.

[0048] Inverted T-shaped cross section: Suitable for limiting the position from the bottom or top of the phone. The horizontal part of the inverted T-shape abuts against the bottom or top of the phone, while the vertical part provides support.

[0049] The drive mechanism is connected to the clamping device and is used to drive the clamping device to move. Specifically, the drive mechanism includes a first drive assembly and a second drive assembly. The first drive assembly is used to drive the clamping mechanism 2.1 to move along a first direction, and the second drive assembly is used to drive the clamping mechanism 2.1 to move along a second direction that intersects with the first direction.

[0050] In this embodiment, the first direction is the vertical direction (up and down), and the second direction is the horizontal direction (left and right). Through the coordinated control of the two drive components, the clamping mechanism 2.1 can be precisely positioned in a two-dimensional plane.

[0051] In another embodiment, the first direction and the second direction can be any two mutually perpendicular directions, which can be flexibly set according to the vehicle space layout and the installation angle of the wireless charging cover.

[0052] The drive mechanism is mechanically connected to the clamping device 2 via a transmission mechanism. The function of the transmission mechanism is to convert the rotary motion of the drive motor into the linear motion of the clamping mechanism 2.1. The drive mechanism includes a stepper motor or a servo motor. The transmission mechanism includes a gear, worm gear, and worm shaft. Both stepper motors and servo motors can achieve precise position control, meeting the positioning accuracy requirements of the clamping device.

[0053] Stepper motors: These achieve precise angle control by adjusting the number and frequency of pulse signals. Stepper motors are low-cost and easy to control, making them suitable for cost-sensitive applications. In one embodiment, a 42-type stepper motor with a step angle of 1.8° can be used, and higher positioning accuracy can be achieved through microstepping.

[0054] Servo motors: These achieve precise position, speed, and torque control through closed-loop control. Servo motors offer advantages such as fast response and high control accuracy, making them suitable for applications with high performance requirements. In one embodiment, a miniature servo motor with a rated torque of 0.1 N·m and a positioning accuracy of ±0.01 mm can be used.

[0055] like Figure 2 As shown, the first drive assembly includes a first stepper motor 2.3 and a first gear and worm gear 2.2, and the second drive assembly includes a second stepper motor 2.5 and a second gear and worm gear 2.4. The gear and worm gear system has the advantages of a large transmission ratio, good self-locking performance, and smooth transmission, enabling it to achieve a large reduction ratio and high positioning accuracy.

[0056] In another embodiment, the transmission mechanism may also be a lead screw and nut transmission mechanism, a gear and rack transmission mechanism, or a synchronous belt transmission mechanism, and the appropriate transmission method may be selected according to the specific application requirements.

[0057] The control unit is electrically connected to the sensor, drive mechanism and charging coil assembly, and is used to calculate the optimal alignment position between the mobile phone and the charging coil assembly based on the position information and size information, and control the drive mechanism to drive the clamping device to move to the optimal alignment position to clamp the mobile phone.

[0058] The control unit is contained in circuit board assembly 4 and stores a mobile phone model database. The mobile phone model database contains charging coil location information corresponding to various mobile phone models.

[0059] The database stores the charging coil position information as an offset relative to the geometric center of the phone. The control unit, based on the phone's dimensions detected by the sensors, searches the database for a matching phone model, obtains the charging coil position parameters for that model, and then calculates the absolute position coordinates of the charging coil.

[0060] The control unit is configured to identify the mobile phone model based on the size information and extract the charging coil position parameters corresponding to the mobile phone model from the mobile phone model database.

[0061] The mobile phone model identification process is as follows: The sensor detects the phone's length L, width W, and thickness H; Search the mobile phone model database for mobile phone models with matching dimensions. The matching criteria are: ;and and ; in, , , The phone dimensions are stored in the database. , , The allowable dimensional error can be set to ±2mm; If a unique matching phone model is found, the charging coil position parameters for that model are extracted. If multiple matching phone models are found, further identification is performed based on the phone's external features (such as camera position, button position, etc.). If no matching phone model is found, the default charging coil position parameters will be used, assuming that the charging coil is located at the geometric center of the phone.

[0062] The control unit is also configured to receive externally input mobile phone size data via a communication interface.

[0063] In one embodiment, a user can connect to the in-vehicle wireless charging system via a mobile app, select or enter the phone model in the app, and the device automatically downloads the charging coil location parameters of that phone model from a cloud database and transmits them to the control unit via Bluetooth, Wi-Fi, or the in-vehicle network.

[0064] The control unit connects to a cloud server via the vehicle network and periodically checks for database updates. When a new mobile phone model is released, the cloud server pushes an update package, which the control unit downloads and installs via OTA, adding the charging coil location information of the new mobile phone model to the local database.

[0065] The control unit is configured to calculate the optimal alignment position between the mobile phone and the charging coil assembly based on position and size information, and control the drive mechanism to move the clamping device to the optimal alignment position to clamp the mobile phone.

[0066] The optimal alignment position is calculated as follows: Based on the phone's location information detected by the sensors, determine the coordinates of the phone's geometric center. , ); Based on the phone size information detected by the sensor, the phone model is identified in the phone model database, and the offset of the charging coil center relative to the geometric center of the phone is extracted. , ); Calculate the absolute coordinates of the center of the phone charging coil: = + , = + ; The center coordinates of the transmitting coil of the charging coil assembly ( , () is a known fixed value; Calculate the distance the phone needs to move: = - , = - ; Move distance ( , The signal is converted into a drive signal, which controls the first drive component and the second drive component to drive the clamping mechanism to move vertically. Move horizontally ; After the clamping mechanism moves to the target position, it applies a restraining force from the side or corner of the phone, pushing the phone to the optimal alignment position and keeping it fixed.

[0067] The control unit, charging coil assembly, and drive mechanism are all housed within the housing, which also contains a cooling fan.

[0068] The circuit board assembly 4 is fixed to the bottom of the housing 5 with screws, the charging coil assembly 3 is fixed above the circuit board assembly 4, and the drive mechanism is fixed to the side wall of the housing 5.

[0069] A cooling fan is installed inside the housing 5. During wireless charging, the charging coil assembly 3 and the power drive circuit generate heat. If too much heat accumulates, it can lead to a decrease in charging efficiency or even trigger overheat protection. The cooling fan is used to accelerate the airflow inside the housing 5 and dissipate the heat to the external environment in a timely manner.

[0070] Example 2 This embodiment proposes an in-vehicle wireless charging method, based on an in-vehicle wireless charging device provided in Embodiment 1, including the following steps: S101: Detects mobile phone location and size information Sensors detect the position and size of a phone placed on the wireless charging cover. When a user places their phone within the designated area on the cover, the sensors activate to detect the phone's position and size. These sensors can be pressure sensors, infrared sensors, or capacitive sensors.

[0071] When using a pressure sensor: The back of the wireless charging cover is equipped with multiple pressure sensors, such as a 4x4 array of 16 sensors. When a phone is placed on the cover, its weight acts on the cover, and each sensor detects a different pressure value. The control unit reads the pressure values ​​from each sensor and calculates the phone's position and size based on the pressure distribution.

[0072] Position calculation method: Calculate the coordinates (X_phone, Y_phone) of the phone's center of gravity by taking a weighted average of the pressure values ​​from each pressure sensor.

[0073] Size calculation method: Calculate the length L and width W of the phone based on the distribution range of sensors with pressure values ​​greater than the threshold.

[0074] When using an infrared sensor: The wireless charging cover has a pair of infrared emitters and receivers on each of its four edges. The infrared emitters continuously emit infrared light, and the infrared receivers receive reflected or transmitted light. When a phone is placed on the cover, it partially blocks the infrared light, reducing the intensity of the light received by the receivers. The control unit calculates the phone's position and size based on the duration and extent of the infrared light blocking.

[0075] Position calculation method: Based on the starting and ending positions of infrared light blocking in four directions, calculate the coordinates of the four edges of the phone, and then calculate the coordinates of the phone's center. , ).

[0076] Size calculation method: Based on the range of infrared light obstruction, the length L and width W of the mobile phone can be directly obtained.

[0077] When using a capacitive sensor: An array of capacitive sensors is located on the back of the wireless charging cover. These sensors utilize the effect of the phone's body on an electric field. When the phone is placed on the ground, a capacitance is formed between the phone and the sensor, and the capacitance value changes with the distance between the phone and the sensor. The control unit reads the capacitance values ​​of each sensor and calculates the phone's position and size based on the capacitance distribution.

[0078] Location calculation method: Based on the location of the sensor with the largest capacitance value, determine the approximate location of the phone's center, and then accurately calculate the coordinates of the phone's center using the gradient distribution of capacitance values. , ).

[0079] Size calculation method: Calculate the length L and width W of the mobile phone based on the distribution range of sensors with capacitance values ​​greater than the threshold.

[0080] S102: Calculate the optimal alignment position Based on location and size information, the optimal alignment position between the phone and the charging coil assembly is calculated. In calculating the optimal alignment position, the location and size information are compared and analyzed against a pre-stored database of phone models.

[0081] The comparative analysis includes: identifying the phone model based on its size information and extracting the charging coil position parameters for the corresponding phone model from the phone model database. The detailed process for phone model identification and charging coil position calculation is as follows: S102-1: Mobile Phone Model Identification The control unit searches for a matching phone model in the phone model database based on the phone size information (L, W, H) detected by the sensors.

[0082] Iterate through all phone models in the database and calculate the difference between the detected size and the database size: = , = , = ; like ≤ 2mm and ≤ 2mm and If the measurement is ≤ 2mm, the phone model is considered to be compatible.

[0083] If a unique matching phone model is found, the identification is successful, and you will proceed to S102-2.

[0084] If multiple matching phone models are found (e.g., different models from the same brand with similar sizes), further identification can be achieved through the following methods: Camera position identification: Some mobile phones have distinctive camera position features, which can be identified through image recognition technology to narrow down the candidate range; Based on user input: prompt the user to select or enter their mobile phone model through the mobile app; Use default parameters: If further identification is not possible, use the most common model parameters among the candidate models.

[0085] If no matching phone model is found, the default charging coil position parameters will be used, assuming the charging coil is located at the geometric center of the phone, i.e. ( , ) = (0, 0).

[0086] S102-2: Extracting charging coil position parameters After identifying the phone model, the charging coil location parameters for that model are extracted from the phone model database. , ), which is the offset of the center of the charging coil relative to the geometric center of the mobile phone.

[0087] S102-3: Calculate the absolute coordinates of the charging coil According to the mobile phone center coordinates detected in step S101 ( , ) and the charging coil offset extracted in step S102-2 ( , Calculate the absolute coordinates of the center of the phone charging coil: = + , = + ; S102-4: Calculate the optimal alignment position The center coordinates of the transmitting coil of the charging coil assembly ( , ) is a known fixed value that has been calibrated during system installation.

[0088] The optimal alignment position is where the center of the phone's charging coil coincides with the center of the transmitting coil. Since the phone is already placed, it needs to be moved to the optimal alignment position using a clamping device.

[0089] Calculate the distance the phone needs to move: = - , = - ; in, This represents the distance that needs to be moved horizontally (left and right). This represents the distance that needs to be moved vertically (up and down).

[0090] like >0 indicates the phone needs to be moved to the right; if <0 indicates that the phone needs to be moved to the left.

[0091] like >0 indicates that the phone needs to be moved upwards; if <0 indicates that the phone needs to be moved downwards.

[0092] The coordinates of the optimal alignment position are ( , The corresponding target position of the clamping device is the current position of the clamping device plus the moving distance. , ).

[0093] S103: Control the drive mechanism to drive the clamping device to move. The control drive mechanism drives the clamping device to move to the optimal alignment position, converts the optimal alignment position into a drive signal, and sends it to the drive mechanism.

[0094] S104: Holds the phone in the optimal alignment position. The phone is held in place by a clamping device. Once the clamping device moves to the target position, the clamping mechanism applies a restraining force from the side or corner of the phone, pushing it into the optimal alignment and holding it in place.

[0095] S105: Performs wireless charging The phone is wirelessly charged using a charging coil assembly. When the phone is fixed in the optimal alignment position, the phone's receiving coil and the charging coil assembly's transmitting coil are precisely aligned, achieving optimal electromagnetic coupling efficiency.

[0096] The control unit activates the charging coil assembly, the transmitting coil begins to generate an alternating magnetic field, the receiving coil of the mobile phone induces alternating current, and after rectification and voltage regulation, it charges the mobile phone battery.

[0097] During the charging process, the control unit can monitor the charging current, charging voltage and charging power in real time, and dynamically adjust the power output of the transmitting coil to achieve optimal charging efficiency.

[0098] Example 3 This embodiment provides a vehicle, including a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the computer instructions are executed by the processor, they complete the in-vehicle wireless charging method described in Embodiment 2. Furthermore, the vehicle in this embodiment is equipped with an in-vehicle wireless charging device provided in Embodiment 1.

[0099] like Figure 1 As shown, the vehicle is equipped with an on-board wireless charging device, which includes: a housing, a wireless charging cover, a charging coil assembly, a sensor, a clamping device, a drive mechanism, and a control unit.

[0100] like Figure 1 As shown, the wireless charging cover 1 serves as the carrier surface for the mobile phone. Its surface has a marking area, which can be achieved by means of silk screen printing, laser engraving, or luminous LED light strips, to guide the user to place the mobile phone in the approximately correct position.

[0101] In one embodiment, the wireless charging cover 1 can be arranged at an angle, with the tilt angle ranging from 15° to 45°, preferably 30°, to facilitate the user's observation of the mobile phone screen while driving.

[0102] Sensors are arranged on the back of the wireless charging cover 1. The sensors are used to detect the position and size information of the mobile phone placed on the wireless charging cover 1.

[0103] Sensors include pressure sensors, infrared sensors, or capacitive sensors.

[0104] Pressure sensors: Multiple pressure sensors are arranged at various locations on the back of the wireless charging cover 1 to determine the placement position and size of the mobile phone by detecting the pressure distribution at each point. The pressure sensors can be resistive, capacitive, or piezoelectric sensors. In one embodiment, a 4×4 array of 16 pressure sensors can be arranged on the back of the wireless charging cover 1. After the mobile phone is placed, the center position coordinates and external dimensions of the mobile phone are calculated based on the pressure values ​​of each sensor.

[0105] Infrared sensors: Arranged around the perimeter of the wireless charging cover 1, these sensors determine the position and size of the phone by emitting infrared light and receiving reflected light. The infrared sensors can be paired with infrared emitters and receivers. In one embodiment, a pair of infrared sensors can be arranged at each of the four edges of the wireless charging cover 1 to determine the phone's position and size by measuring the duration and extent of infrared light obstruction.

[0106] Capacitive sensor: Located on the back of the wireless charging cover 1, it determines the position and size of the phone by detecting changes in capacitance. The capacitive sensor utilizes the influence of the phone's body on the electric field; when the phone is placed, the capacitance value changes, and the position and size of the phone are determined based on the distribution of this capacitance change.

[0107] The sensor is electrically connected to the circuit board assembly 4 via an FPC cable, and sends the collected mobile phone location and size information to the MCU control unit for processing.

[0108] In one specific embodiment, a pressure sensor and a capacitance sensor can be used simultaneously, and the detection accuracy and reliability can be improved by fusing the data from the two sensors.

[0109] like Figure 2 As shown, the clamping device is movably disposed around the wireless charging cover for clamping and fixing the mobile phone. The clamping device 2 includes at least two sets of clamping mechanisms 2.1. Depending on the spatial layout differences of different vehicle models, one, two or more sets of clamping devices can be symmetrically arranged.

[0110] In this embodiment, the clamping device 2 includes two sets of clamping mechanisms 2.1, respectively arranged on opposite sides of the wireless charging cover 1, for applying constraint forces from the left and right sides of the mobile phone. In another embodiment, the clamping device 2 may include four sets of clamping mechanisms 2.1, respectively arranged at the four corners of the wireless charging cover 1, for applying constraint forces from the four corners of the mobile phone simultaneously, providing a more stable clamping effect.

[0111] The clamping mechanism 2.1 is made of a non-metallic material, such as PP (polypropylene), ABS (acrylonitrile-butadiene-styrene copolymer), or PC (polycarbonate). The purpose of using a non-metallic material is to avoid interference from metallic materials with the electromagnetic field during wireless charging, ensuring that charging efficiency is not affected. In a preferred embodiment, the clamping mechanism 2.1 is made of the same PP material as the vehicle interior trim, ensuring both functionality and visual consistency with the vehicle interior.

[0112] The cross-section of the clamping mechanism 2.1 can be L-shaped, U-shaped, or inverted T-shaped. Different cross-sectional shapes are suitable for different clamping methods: L-shaped cross section: suitable for limiting the phone from the side. One arm of the L-shape abuts against the side of the phone, and the other arm abuts against the bottom or top of the phone, forming a constraint in two directions.

[0113] U-shaped cross section: suitable for limiting the position of a mobile phone from the corner. The two arms of the U shape abut against the two adjacent sides of the mobile phone to form a corner constraint.

[0114] Inverted T-shaped cross section: Suitable for limiting the position from the bottom or top of the phone. The horizontal part of the inverted T-shape abuts against the bottom or top of the phone, while the vertical part provides support.

[0115] The drive mechanism is connected to the clamping device and is used to drive the clamping device to move. Specifically, the drive mechanism includes a first drive assembly and a second drive assembly. The first drive assembly is used to drive the clamping mechanism 2.1 to move along a first direction, and the second drive assembly is used to drive the clamping mechanism 2.1 to move along a second direction that intersects with the first direction.

[0116] In this embodiment, the first direction is the vertical direction (up and down), and the second direction is the horizontal direction (left and right). Through the coordinated control of the two drive components, the clamping mechanism 2.1 can be precisely positioned in a two-dimensional plane.

[0117] In another embodiment, the first direction and the second direction can be any two mutually perpendicular directions, which can be flexibly set according to the vehicle space layout and the installation angle of the wireless charging cover.

[0118] The drive mechanism is mechanically connected to the clamping device 2 via a transmission mechanism. The function of the transmission mechanism is to convert the rotary motion of the drive motor into the linear motion of the clamping mechanism 2.1. The drive mechanism includes a stepper motor or a servo motor. The transmission mechanism includes a gear, worm gear, and worm shaft. Both stepper motors and servo motors can achieve precise position control, meeting the positioning accuracy requirements of the clamping device.

[0119] Stepper motors: These achieve precise angle control by adjusting the number and frequency of pulse signals. Stepper motors are low-cost and easy to control, making them suitable for cost-sensitive applications. In one embodiment, a 42-type stepper motor with a step angle of 1.8° can be used, and higher positioning accuracy can be achieved through microstepping.

[0120] Servo motors: These achieve precise position, speed, and torque control through closed-loop control. Servo motors offer advantages such as fast response and high control accuracy, making them suitable for applications with high performance requirements. In one embodiment, a miniature servo motor with a rated torque of 0.1 N·m and a positioning accuracy of ±0.01 mm can be used.

[0121] like Figure 2 As shown, the first drive assembly includes a first stepper motor 2.3 and a first gear and worm gear 2.2, and the second drive assembly includes a second stepper motor 2.5 and a second gear and worm gear 2.4. The gear and worm gear system has the advantages of a large transmission ratio, good self-locking performance, and smooth transmission, enabling it to achieve a large reduction ratio and high positioning accuracy.

[0122] In another embodiment, the transmission mechanism may also be a lead screw and nut transmission mechanism, a gear and rack transmission mechanism, or a synchronous belt transmission mechanism, and the appropriate transmission method may be selected according to the specific application requirements.

[0123] The control unit is electrically connected to the sensor, drive mechanism and charging coil assembly, and is used to calculate the optimal alignment position between the mobile phone and the charging coil assembly based on the position information and size information, and control the drive mechanism to drive the clamping device to move to the optimal alignment position to clamp the mobile phone.

[0124] The control unit is contained in circuit board assembly 4 and stores a mobile phone model database. The mobile phone model database contains charging coil location information corresponding to various mobile phone models.

[0125] The database stores the charging coil position information as an offset relative to the geometric center of the phone. The control unit, based on the phone's dimensions detected by the sensors, searches the database for a matching phone model, obtains the charging coil position parameters for that model, and then calculates the absolute position coordinates of the charging coil.

[0126] The control unit is configured to identify the mobile phone model based on the size information and extract the charging coil position parameters corresponding to the mobile phone model from the mobile phone model database.

[0127] The control unit is also configured to receive externally input mobile phone size data via a communication interface.

[0128] In one embodiment, a user can connect to the in-vehicle wireless charging system via a mobile app, select or enter the phone model in the app, and the device automatically downloads the charging coil location parameters of that phone model from a cloud database and transmits them to the control unit via Bluetooth, Wi-Fi, or the in-vehicle network.

[0129] The control unit connects to a cloud server via the vehicle network and periodically checks for database updates. When a new mobile phone model is released, the cloud server pushes an update package, which the control unit downloads and installs via OTA, adding the charging coil location information of the new mobile phone model to the local database.

[0130] The control unit is configured to calculate the optimal alignment position between the mobile phone and the charging coil assembly based on position and size information, and control the drive mechanism to move the clamping device to the optimal alignment position to clamp the mobile phone.

[0131] The control unit, charging coil assembly, and drive mechanism are all housed within the housing, which also contains a cooling fan.

[0132] The circuit board assembly 4 is fixed to the bottom of the housing 5 with screws, the charging coil assembly 3 is fixed above the circuit board assembly 4, and the drive mechanism is fixed to the side wall of the housing 5.

[0133] A cooling fan is installed inside the housing 5. During wireless charging, the charging coil assembly 3 and the power drive circuit generate heat. If too much heat accumulates, it can lead to a decrease in charging efficiency or even trigger overheat protection. The cooling fan is used to accelerate the airflow inside the housing 5 and dissipate the heat to the external environment in a timely manner.

[0134] This vehicle implements an onboard wireless charging method, which includes the following steps: S101: Detects mobile phone location and size information Sensors detect the position and size of a phone placed on the wireless charging cover. When a user places their phone within the designated area on the cover, the sensors activate to detect the phone's position and size. These sensors can be pressure sensors, infrared sensors, or capacitive sensors.

[0135] When using a pressure sensor: The back of the wireless charging cover is equipped with multiple pressure sensors, such as a 4x4 array of 16 sensors. When a phone is placed on the cover, its weight acts on the cover, and each sensor detects a different pressure value. The control unit reads the pressure values ​​from each sensor and calculates the phone's position and size based on the pressure distribution.

[0136] Position calculation method: Calculate the coordinates (X_phone, Y_phone) of the phone's center of gravity by taking a weighted average of the pressure values ​​from each pressure sensor.

[0137] Size calculation method: Calculate the length L and width W of the phone based on the distribution range of sensors with pressure values ​​greater than the threshold.

[0138] When using an infrared sensor: The wireless charging cover has a pair of infrared emitters and receivers on each of its four edges. The infrared emitters continuously emit infrared light, and the infrared receivers receive reflected or transmitted light. When a phone is placed on the cover, it partially blocks the infrared light, reducing the intensity of the light received by the receivers. The control unit calculates the phone's position and size based on the duration and extent of the infrared light blocking.

[0139] Position calculation method: Based on the starting and ending positions of infrared light blocking in four directions, calculate the coordinates of the four edges of the phone, and then calculate the coordinates of the phone's center. , ).

[0140] Size calculation method: Based on the range of infrared light obstruction, the length L and width W of the mobile phone can be directly obtained.

[0141] When using a capacitive sensor: An array of capacitive sensors is located on the back of the wireless charging cover. These sensors utilize the effect of the phone's body on an electric field. When the phone is placed on the ground, a capacitance is formed between the phone and the sensor, and the capacitance value changes with the distance between the phone and the sensor. The control unit reads the capacitance values ​​of each sensor and calculates the phone's position and size based on the capacitance distribution.

[0142] Location calculation method: Based on the location of the sensor with the largest capacitance value, determine the approximate location of the phone's center, and then accurately calculate the coordinates of the phone's center using the gradient distribution of capacitance values. , ).

[0143] Size calculation method: Calculate the length L and width W of the mobile phone based on the distribution range of sensors with capacitance values ​​greater than the threshold.

[0144] S102: Calculate the optimal alignment position Based on location and size information, the optimal alignment position between the phone and the charging coil assembly is calculated. In calculating the optimal alignment position, the location and size information are compared and analyzed against a pre-stored database of phone models.

[0145] The comparative analysis includes: identifying the phone model based on its size information and extracting the charging coil position parameters for the corresponding phone model from the phone model database. The detailed process for phone model identification and charging coil position calculation is as follows: S102-1: Mobile Phone Model Identification The control unit searches for a matching phone model in the phone model database based on the phone size information (L, W, H) detected by the sensors.

[0146] Iterate through all phone models in the database and calculate the difference between the detected size and the database size: = , = , = ; like ≤ 2mm and ≤ 2mm and If the measurement is ≤ 2mm, the phone model is considered to be compatible.

[0147] If a unique matching phone model is found, the identification is successful, and you will proceed to S102-2.

[0148] If multiple matching phone models are found (e.g., different models from the same brand with similar sizes), further identification can be achieved through the following methods: Camera position identification: Some mobile phones have distinctive camera position features, which can be identified through image recognition technology to narrow down the candidate range; Based on user input: prompt the user to select or enter their mobile phone model through the mobile app; Use default parameters: If further identification is not possible, use the most common model parameters among the candidate models.

[0149] If no matching phone model is found, the default charging coil position parameters will be used, assuming the charging coil is located at the geometric center of the phone, i.e. ( , ) = (0, 0).

[0150] S102-2: Extracting charging coil position parameters After identifying the phone model, the charging coil location parameters for that model are extracted from the phone model database. , ), which is the offset of the center of the charging coil relative to the geometric center of the mobile phone.

[0151] S102-3: Calculate the absolute coordinates of the charging coil According to the mobile phone center coordinates detected in step S101 ( , ) and the charging coil offset extracted in step S102-2 ( , Calculate the absolute coordinates of the center of the phone charging coil: = + , = + ; S102-4: Calculate the optimal alignment position The center coordinates of the transmitting coil of the charging coil assembly ( , ) is a known fixed value that has been calibrated during system installation.

[0152] The optimal alignment position is where the center of the phone's charging coil coincides with the center of the transmitting coil. Since the phone is already placed, it needs to be moved to the optimal alignment position using a clamping device.

[0153] Calculate the distance the phone needs to move: = - , = - ; in, This represents the distance that needs to be moved horizontally (left and right). This represents the distance that needs to be moved vertically (up and down).

[0154] like >0 indicates the phone needs to be moved to the right; if <0 indicates that the phone needs to be moved to the left.

[0155] like >0 indicates that the phone needs to be moved upwards; if <0 indicates that the phone needs to be moved downwards.

[0156] The coordinates of the optimal alignment position are ( , The corresponding target position of the clamping device is the current position of the clamping device plus the moving distance. , ).

[0157] S103: Control the drive mechanism to drive the clamping device to move. The control drive mechanism drives the clamping device to move to the optimal alignment position, converts the optimal alignment position into a drive signal, and sends it to the drive mechanism.

[0158] S104: Holds the phone in the optimal alignment position. The phone is held in place by a clamping device. Once the clamping device moves to the target position, the clamping mechanism applies a restraining force from the side or corner of the phone, pushing it into the optimal alignment and holding it in place.

[0159] S105: Performs wireless charging The phone is wirelessly charged using a charging coil assembly. When the phone is fixed in the optimal alignment position, the phone's receiving coil and the charging coil assembly's transmitting coil are precisely aligned, achieving optimal electromagnetic coupling efficiency.

[0160] The control unit activates the charging coil assembly, the transmitting coil begins to generate an alternating magnetic field, the receiving coil of the mobile phone induces alternating current, and after rectification and voltage regulation, it charges the mobile phone battery.

[0161] During the charging process, the control unit can monitor the charging current, charging voltage and charging power in real time, and dynamically adjust the power output of the transmitting coil to achieve optimal charging efficiency.

[0162] Example 4 This embodiment provides a computer program product, which includes executable instructions stored in a computer-readable storage medium; wherein, when the vehicle's processor reads the executable instructions from the computer-readable storage medium and executes the executable instructions, it completes the in-vehicle wireless charging method described in Embodiment 1.

[0163] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0164] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0165] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment, whereby a series of operational steps are performed to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

[0166] The steps and methods involved in Embodiments 2 to 5 above correspond to those in Embodiment 1. For detailed implementation methods, please refer to the relevant description section of Embodiment 1. The descriptions of each embodiment in the above embodiments have different emphases. Parts not described in detail in a certain embodiment can be referred to the relevant descriptions of other embodiments.

[0167] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.

[0168] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vehicle-mounted wireless charging device, comprising a wireless charging cover and a charging coil assembly, characterized in that, Also includes: Sensors, clamping devices, drive mechanisms, and control units; The sensor is used to detect the position and size information of the mobile phone placed on the wireless charging cover; the clamping device is movably disposed around the wireless charging cover for clamping and fixing the mobile phone; the driving mechanism is connected to the clamping device for driving the clamping device to move; the charging coil assembly is disposed below the wireless charging cover; the control unit is electrically connected to the sensor, the driving mechanism and the charging coil assembly, for calculating the optimal alignment position between the mobile phone and the charging coil assembly based on the position and size information, and controlling the driving mechanism to drive the clamping device to move to the optimal alignment position to clamp the mobile phone.

2. The in-vehicle wireless charging device as described in claim 1, characterized in that, The sensor is disposed on the back of the wireless charging cover, and the sensor includes a pressure sensor, an infrared sensor, or a capacitive sensor.

3. The in-vehicle wireless charging device as described in claim 1, characterized in that, The clamping device includes at least two sets of clamping mechanisms, the cross-section of which is L-shaped, U-shaped, or inverted T-shaped.

4. The in-vehicle wireless charging device as described in claim 1, characterized in that, The driving mechanism includes a first driving component and a second driving component. The first driving component is used to drive the clamping mechanism to move along a first direction, and the second driving component is used to drive the clamping mechanism to move along a second direction that intersects with the first direction.

5. The in-vehicle wireless charging device as described in claim 4, characterized in that, The drive mechanism is mechanically connected to the clamping device through a transmission mechanism, wherein the drive mechanism includes a stepper motor or a servo motor, and the transmission mechanism includes a gear, worm gear, and worm shaft.

6. The in-vehicle wireless charging device as described in claim 1, characterized in that, It also includes a housing; the control unit, charging coil assembly and drive mechanism are all disposed inside the housing, and a cooling fan is provided inside the housing.

7. The in-vehicle wireless charging device as described in claim 1, characterized in that, The control unit stores a mobile phone model database, which contains charging coil location information for various mobile phone models.

8. A vehicle-mounted wireless charging method, based on the vehicle-mounted wireless charging device according to any one of claims 1-7, characterized in that, include: The sensor detects the position and size of the phone placed on the wireless charging cover. Based on the position and size information, calculate the optimal alignment position between the mobile phone and the charging coil assembly; control the drive mechanism to move the clamping device to the optimal alignment position. The phone is held in place by a clamping device and secured in the optimal alignment position; the phone is wirelessly charged by a charging coil assembly.

9. A vehicle, characterized in that, It includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, which, when executed by the processor, perform the in-vehicle wireless charging method according to any one of claims 8.

10. A computer program product comprising executable instructions stored in a computer-readable storage medium; wherein, When the vehicle's processor reads executable instructions from a computer-readable storage medium and executes the executable instructions, it completes the in-vehicle wireless charging method according to any one of claims 8.

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