A full-automatic wireless charging intelligent door lock

Abstract

The utility model discloses a full -automatic wireless charging's intelligent door lock aims at solving the existing door lock wired power supply installation is complicated, battery power supply maintenance is inconvenient and wireless scheme alignment difference etc. It includes wireless charging transmission module and wireless charging receiving module of the door panel of installation in the door frame, and both automatic alignment when the door is closed, realizes non -contact electric energy transmission through electromagnetic induction. Transmission module contains the transmission box fixed in the lock catch board, and has the transmission mainboard and transmission coil with the resonance matching circuit in, and receiving module contains receiving box, and has receiving coil, receiving mainboard and energy storage device (battery or electric capacity) in, and receiving mainboard integrates rectification filter, voltage regulation and protection circuit. The power supply box adopts the modularization design, and the receiving box is detachable, and is convenient for maintenance. The door lock does not need wiring, and the charging efficiency reaches 75% 85%, and is safe and reliable, and is suitable for multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of smart home equipment technology, and in particular to a fully automatic smart door lock with integrated wireless charging function, specifically involving a structural design that enables the door lock to be self-powered through non-contact power transmission. Background Technology

[0002] The power supply methods for existing smart door locks are mainly divided into two categories:

[0003] Wired power supply: It requires laying wires between the door and the door frame, which requires damaging the door or door frame structure during installation. The wires are also prone to fatigue breakage due to the opening and closing of the door, resulting in high maintenance costs.

[0004] Battery powered: It uses replaceable dry cell batteries or rechargeable lithium batteries, which need to be removed and replaced or charged regularly. If the batteries are not replaced, the door lock may lose power and fail, resulting in a poor user experience.

[0005] While some wireless charging solutions have been applied to smart devices, they have the following drawbacks in door lock scenarios:

[0006] The coil alignment accuracy is low, the energy storage device and the door lock main board have low integration, and the entire lock body needs to be disassembled when replacing the battery, which is cumbersome.

[0007] To address this issue, this invention proposes a fully automatic wireless charging smart door lock, which solves the aforementioned technical problems by optimizing the coil alignment structure, integrating safety protection circuits, and using a modular design. Utility Model Content

[0008] This utility model aims to solve the problems of inconvenient installation of wired power supply, cumbersome maintenance of battery power supply, and coil alignment errors and insufficient security in wireless charging solutions of existing smart door locks, and provides a smart door lock structure that is wire-free, automatically charged, safe and reliable.

[0009] This smart door lock includes a wireless charging transmitter module and a wireless charging receiver module. The wireless charging transmitter module is installed inside the door frame, and the wireless charging receiver module is installed on the door panel, receiving power from the wireless charging transmitter module and powering the door lock. The wireless charging transmitter module and the wireless charging receiver module automatically align when the door is closed, using the principle of electromagnetic induction to achieve contactless power transmission, completely replacing wired power supply, avoiding the problem of wire fatigue and breakage caused by door opening and closing, and requiring no damage to the door or door frame structure during installation, making it compatible with various door types.

[0010] Further describing the aforementioned solution, the wireless charging transmitter module includes a transmitter box fixed to the latch plate. The transmitter box contains a transmitter motherboard and a transmitter coil, and the transmitter motherboard is connected to an external power supply. In some solutions, the transmitter motherboard converts the external AC power into high-frequency AC power adapted to the coil, driving the transmitter coil to generate a magnetic field. This technical solution integrates the transmitter module using the existing installation space of the latch plate, eliminating the need for additional door frame space, resulting in a compact structure that does not affect door closure. The external power supply ensures continuous power supply to the transmitter module, avoiding the problem of insufficient energy storage at the transmitter itself, and is suitable for long-term standby scenarios.

[0011] Further description of the aforementioned scheme: the “resonant matching circuit” of the transmitting motherboard is designed with capacitor and inductor parameters to make the transmitting coil work at a preset resonant frequency (consistent with the frequency of the receiving coil), thereby reducing energy reflection loss; the transmitting coil is embedded in the side of the transmitting box facing the door panel to ensure that the magnetic field direction is perpendicular to the receiving coil, thereby enhancing the coupling strength.

[0012] Further description of the aforementioned solution: the wireless charging receiver module includes a receiver box, which contains a receiver coil, a receiver motherboard, and an energy storage device. The receiver coil receives power from the wireless charging transmitter module and stores it in the energy storage device through the receiver motherboard. The receiver motherboard is electrically connected to the door lock motherboard to supply power to the lock body drive components.

[0013] Further describing the aforementioned solution, the receiving motherboard integrates a rectifier and filter circuit and a voltage regulation module. The rectifier and filter circuit converts the AC power from the receiving coil into DC power, and the voltage regulation module stabilizes the DC power to a charging voltage suitable for the energy storage device. A stable DC voltage extends the lifespan of the energy storage device and reduces the probability of the door lock circuit malfunctioning due to voltage fluctuations; filtering reduces electromagnetic interference and ensures signal stability for the door lock motherboard (including the microprocessor and sensors).

[0014] Further describing the aforementioned solution, the energy storage device employs a rechargeable electrochemical energy storage mechanism, including a lithium battery, a supercapacitor, or a combination of both. When a rechargeable battery is used, the receiving motherboard integrates a battery protection circuit, including overcharge protection, over-discharge protection, and short-circuit protection modules. Lithium batteries are suitable for high-capacity demand scenarios (long battery life), while supercapacitors are suitable for high-frequency charging and discharging scenarios (long lifespan, good low-temperature performance) and offer strong compatibility.

[0015] Further describing the aforementioned solution, the receiver box is detachably installed inside the power supply box, which is fixedly installed above the lock body. The power supply box includes a detachable power supply box cover and a main board. The main board and receiver box are respectively installed in the main board compartment and power supply compartment of the power supply box. The power supply box has a cable hole for the connection cable between the main board and the lock body to pass through. The detachable receiver box design allows the energy storage device to be replaced without disassembling the entire lock body, reducing the operation time from 10 minutes to 1 minute and improving maintenance efficiency by 90%.

[0016] Further description of the aforementioned scheme: the transmitting coil and the receiving coil have the same geometric dimensions, and the deviation of their central axes does not exceed 3mm when the door is closed; both the transmitting coil and the receiving coil adopt a flat spiral structure, and the outer side of the coil is wrapped with a ferrite shielding layer to reduce magnetic field leakage in the non-receiving direction.

[0017] Further describing the aforementioned solution, the wireless charging transmitter module also includes a door status detection unit, which is a Hall sensor. When the door is closed, the Hall sensor outputs a trigger signal to the transmitter motherboard to initiate wireless charging; when the door is open, the transmitter motherboard stops supplying power. This avoids the coil spinning idly and generating an invalid magnetic field when the door is open, reducing the risk of inductive heating of metallic foreign objects (such as keys or coins).

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] No wiring required, easy installation: Wireless charging replaces wired power supply, avoiding damage to the door structure. The transmitter module is directly fixed to the strike plate, and the receiver module is integrated into the power box, improving installation efficiency by 60%.

[0020] Automatic alignment and efficient charging: The deviation of the coil center axis is controlled within 3mm. With the help of the ferrite shielding layer, the charging efficiency reaches 75%-85% (door closed state).

[0021] Safe and reliable: The integrated Hall sensor enables door status linkage (no charging when not closed), and the transmitter motherboard has built-in foreign object detection to avoid the risk of metal overheating;

[0022] Easy maintenance: The receiver box adopts a snap-on design, so there is no need to remove the lock body to replace the energy storage device; simply open the power box cover.

[0023] High compatibility: The energy storage device supports switching between batteries and supercapacitors to adapt to different scenario requirements (supercapacitors are preferred for low-temperature environments, and lithium batteries are preferred for high battery life requirements). Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 , 2 This is an overall schematic diagram of an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the launch box explosion provided for an embodiment of the present utility model;

[0027] Figure 4 , 5 An exploded view of the power supply box provided in an embodiment of this utility model;

[0028] Figure 6 An exploded view of the receiver box provided in an embodiment of this utility model;

[0029] Figure 7 The transmitting coil circuit diagram provided for the embodiments of this utility model;

[0030] Figure 8 The receiving coil circuit diagram provided for an embodiment of this utility model.

[0031] The following are the labeling elements in the figure:

[0032] 1. Wireless charging transmitter module; 11. Transmitter box; 12. Transmitter motherboard; 13. Transmitter coil; 2. Wireless charging receiver module; 20. Motherboard; 21. Power supply box; 22. Power supply box cover; 221. Cable hole; 23. Power supply compartment; 24. Motherboard compartment; 25. Receiver box; 251. Receiver box cover; 26. Receiver coil; 27. Receiver motherboard; 28. Energy storage device; 3. Lock body; 4. Locking plate.

[0033] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0036] Please refer to Figures 1-8. The core of this fully automatic wireless charging smart door lock lies in the combination of mechanical structure and electromagnetic induction technology to achieve automatic power transmission and storage when the door is closed. The overall structure includes a wireless charging transmitter module 1, a wireless charging receiver module 2, a lock body 3, and a strike plate 4. The assembly relationship of each component is based on the fit between the lock body 3 and the strike plate 4, ensuring that the central axes of the wireless charging transmitter module 1 and the receiver module 2 coincide when the door is closed, with the deviation controlled within 3 mm. The transmitter module 1 is embedded inside the strike plate 4, and the receiver module 2 is integrated into the power box 21 above the lock body 3. The air gap between the two when the door is closed is 1 to 5 mm to maximize the electromagnetic coupling efficiency.

[0037] As shown in Figure 3, the wireless charging transmitter module 1 consists of a transmitter box 11, a transmitter mainboard 12, and a transmitter coil 13. The transmitter box 11 is made of ABS engineering plastic with a flame retardant rating of UL94 V0. It has a rectangular structure and is fixed in a pre-set groove inside the latch plate 4, ensuring that the surface of the transmitter box 11 is flush with the surface of the latch plate 4 and does not affect the closing of the door. The transmitter box 11 has a groove on the side facing the door panel for embedding the transmitter coil 13. In this embodiment, the transmitter coil 13 is made of Φ0.2 mm enameled wire wound flat, and its geometric dimensions are an ellipse with a near-rectangular shape. A 1 mm thick ferrite sheet is pasted on the outside of the coil and fixed with high-temperature resistant double-sided adhesive to constrain the direction of the magnetic field, reduce magnetic field leakage into the door frame, and reduce eddy current losses on the metal door frame. The transmitter mainboard 12 integrates the XKT-510 wireless charging transmitter chip and peripheral circuitry. In this embodiment, the 220V AC mains power is converted to 5V DC and then connected to the transmitting motherboard 12. The XKT-510 chip converts the 5V DC power into 131kHz high-frequency AC power, driving the transmitting coil 13 to generate an alternating magnetic field. As shown in Figure 7, the transmitting motherboard 12 also integrates a resonant matching circuit. Through the design of capacitor and inductor parameters, the transmitting coil 13 operates at a preset resonant frequency, consistent with the frequency of the receiving coil 26, reducing energy reflection loss. The Hall sensor, as a door status detection unit, is installed on the edge of the transmitting motherboard 12 near the edge of the transmitting box 11. It detects the magnet on the door plate and outputs high and low level signals: when the door is closed, it outputs a high level (≥3V), triggering the EN pin of the XKT-510 to start working; when the door is open, it outputs a low level (≤0.5V), and the chip enters standby mode with a standby current ≤10μA.

[0038] The power input terminal of the transmitter motherboard 12 is connected to a 5V / 1A DC power supply via a DC-005 interface, which is provided by an external 220V to 5V adapter. The adapter output wire is made of Φ0.3 mm² multi-strand copper core wire, 2 meters long, and passes through the pre-set wire hole in the door frame to connect to the transmitter motherboard 12. A 1A self-resetting fuse is connected in series in the middle of the line to prevent damage to the transmitter motherboard 12 in case of short circuit.

[0039] As shown in Figures 5 and 6, the wireless charging receiver module 2 consists of a power supply box 21, a receiver box 25, a receiving coil 26, a receiving main board 27, and an energy storage device 28. The power supply box 21 is injection molded from ABS material and is fixed to the inside of the door panel above the lock body 3. Internally, it is divided into a main board compartment 24 and a power supply compartment 23 by a vertical insulating partition. The main board compartment 24 is used to install the door lock main board 20, and the power supply compartment 23 is used to install the receiver box 25. A positioning post is provided at the bottom, which mates with the positioning hole at the bottom of the receiver box 25, with a clearance of 0.1 mm, ensuring that the center of the receiver box 25 is aligned with the center of the transmitting module 1 during installation. The power supply box cover 22 is connected to the main body of the power supply box 21 via a snap-fit ​​structure, and has a waterproof adhesive strip on the edge, made of silicone. A wire hole 221 is located on the side of the power supply box cover 22 near the lock body 3, allowing the connecting wires between the door lock main board 20 and the lock body 3 to pass through.

[0040] The receiver box 25 has a cuboid structure and adopts a snap-fit ​​design with upper and lower covers (the upper cover is the receiver box cover 251). It is made of ABS material with a flame retardant rating of UL94 V0. The receiver box 25 internally houses the receiving coil 26, the receiving main board 27, and the energy storage device 28. The receiving coil 26 is fixed to the side of the receiver box 25 facing the door panel with double-sided adhesive, corresponding to the transmitting coil 13, and the center of the coil coincides with the geometric center of the receiver box 25.

[0041] The receiving coil 26 has the same parameters as the transmitting coil 13, and a 1 mm thick ferrite sheet is attached to its outer side. The receiving mainboard 27 integrates a rectifier and filter circuit, a voltage regulation module, and a battery protection circuit. The rectifier and filter circuit converts the AC power from the receiving coil 26 into DC power, removing noise interference; the voltage regulation module stabilizes the DC voltage at the rated charging voltage of the energy storage device 28, such as 4.2V or 3.7V for a lithium battery or 5.4V for a supercapacitor, through a voltage regulator chip. The energy storage device 28 uses a rechargeable electrochemical energy storage device, including a lithium battery, a supercapacitor, or a combination of both; when a rechargeable battery is used, the receiving mainboard 27 integrates a battery protection circuit, including overcharge protection, over-discharge protection, and short-circuit protection modules, which monitor voltage / current and cut off the circuit in case of overcharging (above 4.2V), over-discharge (below 2.7V), or short circuit.

[0042] As shown in Figure 7, when the energy storage device 28 is a 3.7V lithium battery (1500mAh), R1 is selected as 5.9KΩ (1% accuracy), and the output power is set to 3W (corresponding to a charging current of about 800mA), which meets the requirement of fully charging in 3 hours.

[0043] When the energy storage device 28 is a 5.5V supercapacitor (1F), R1 is replaced with 4.7KΩ, and the output power is increased to 5W (corresponding to a charging current of about 1.2A), which is suitable for high-frequency charging and discharging scenarios.

[0044] Connect an external 5uH inductor (model: CDRH3D16) to pin 5 (frequency adjustment) of chip 12 on the transmitting motherboard. Together with C3 (100nF NPO capacitor), stabilize the 131kHz resonant frequency to ensure that it is consistent with the frequency of coil 26 at the receiving end.

[0045] To address the impedance differences in the receiving coils 26 of different energy storage devices 28, the parameters of the resonant circuit at the transmitter 1 can be dynamically adjusted, as shown in Figure 8:

[0046] Lithium battery scenario: The transmitting coil 13 is connected in series with a 470pF NPO capacitor (model: CL21C471J) to form an LC resonance with the coil's own inductance (approximately 8uH), matching the receiver impedance (approximately 50Ω).

[0047] Supercapacitor scenario: A 330pF NPO capacitor is connected in series with the transmitting coil 13 to reduce the resonant impedance to 30Ω and improve energy transfer efficiency.

[0048] In the circuit, C1 (22uF / 16V) is the power supply filter capacitor, and R2 and R3 (both 47KΩ) are chip bias resistors to ensure stable operating point.

[0049] Gate status linkage and power control:

[0050] The Hall sensor (model: OH44E) is mounted on the edge of the transmitting mainboard 12, and works in conjunction with the neodymium iron boron magnet on the door panel to detect the door status and output an electrical signal.

[0051] When the gate is closed (magnetic field strength ≥100mT), a 3.3V high level is output to the EN pin of the XKT-510, and the 12 chips on the transmitting motherboard start working;

[0052] When the door is opened (magnetic field strength ≤ 10mT), a low level of 0.3V is output, the mainboard chip 12 enters standby mode (standby current ≤ 10μA), and the high-frequency inverter circuit is cut off to avoid unnecessary energy consumption.

[0053] The receiving motherboard 27 of the wireless charging receiver module 2 achieves compatibility with the different requirements of lithium batteries (3.7V) and supercapacitors (5.5V) through modular circuit design, as detailed below:

[0054] Rectifier and filter circuit:

[0055] The alternating current induced by the receiving coil 26 (with parameters identical to the transmitting coil 13) is converted into direct current by a full-bridge rectifier circuit (model: MB10F, composed of four IN4148 diodes), followed by two cascaded filters:

[0056] First stage: 10uF / 25V electrolytic capacitor (model: Rubycon ZL series) to filter out low-frequency ripple;

[0057] Second stage: 100nF NPO ceramic capacitor (model: MLCC 0805 package) to suppress high-frequency noise and ensure output DC ripple ≤50mV.

[0058] Voltage regulation module: Lithium battery adapter (3.7V), receiving motherboard 27 uses TP4056 charging management chip, input voltage range 4.5-5.5V, by adjusting feedback resistors R4 (20KΩ) and R5 (100KΩ), the output voltage is stabilized at 4.2V (standard charging voltage of lithium battery), and the charging current is set to 800mA by R6 (200KΩ).

[0059] Supercapacitor adapter (5.5V): Replace the receiver motherboard 27 with an LM1117-5.5 voltage regulator chip, with an input voltage of 6-8V, an output voltage of 5.5V, and an output current of 1A. Add a 10uF input capacitor and a 22uF output capacitor (both solid-state capacitors) in series to ensure a dynamic response speed of ≤100us.

[0060] Lithium battery protection: The receiving motherboard integrates a DW01+MOSFET protection module, with specific threshold values ​​as follows:

[0061] Overcharge protection: When the battery voltage is ≥4.25V, the charging circuit will be cut off after a delay of 1.2s;

[0062] Over-discharge protection: When the battery voltage is ≤2.7V, the discharge circuit is cut off after a 300ms delay;

[0063] Short circuit protection: When a loop current ≥5A is detected, the MOSFET is turned off within 0.1s, and automatically recovers after the short circuit is cleared.

[0064] Supercapacitor protection: The receiving motherboard 27 uses the TC1185 overvoltage protection chip, with an overvoltage threshold of 5.5V. When the capacitor voltage exceeds the threshold, the chip outputs a low level to drive the transistor to cut off the charging circuit, with a response time of ≤50us. At the same time, a 100KΩ discharge resistor is connected in parallel to ensure that the voltage is ≤5V when the capacitor is idle.

[0065] Lithium battery charging scenario: After the door is closed, transmitter 1 detects a high-level signal and starts working. Receiver 2 rectifies and filters the signal to output 5V DC power. The TP4056 chip on the receiving motherboard 27 charges the 3.7V lithium battery (energy storage device 28) with a current of 800mA. When the battery voltage reaches 4.2V, the TP4056 automatically enters trickle charging mode until the voltage stabilizes at 4.2V and then stops. Throughout the process, the DW01 module on the receiving motherboard 27 monitors the risk of overcharge / over-discharge.

[0066] Supercapacitor charging scenario: The voltage regulation module of the receiving motherboard 27 of the receiver end 2 outputs 5.5V and charges the supercapacitor (energy storage device 28) with a current of 1.2A; when the capacitor voltage approaches 5.5V, the TC1185 on the receiving motherboard 27 triggers overvoltage protection and cuts off the charging circuit; when the door lock is working, the capacitor supplies power to the drive component of the lock body 3 through the voltage regulation module of the receiving motherboard 27 (stepping down to 3.3V). In high-frequency opening and closing scenarios, the capacitor charge and discharge cycle life is ≥100,000 times.

[0067] This utility model, through the above-described structural design, achieves fully automatic wireless charging, completely replacing wired power supply and avoiding the problem of wire fatigue and breakage caused by door opening and closing. Installation requires no damage to the door / frame structure and is compatible with various door types. The automatic alignment design ensures stable energy transmission without the need for manual calibration. Transmitter module 1 connects to external AC power for continuous supply, while receiver module 2 integrates an energy storage unit 28, enabling both real-time power supply and energy storage backup modes, solving the problem of door lock power loss due to wireless charging interruption when the door is opened. A resonant matching circuit improves energy transmission efficiency, a ferrite shielding layer reduces magnetic field leakage, and a protection circuit extends the lifespan of the energy storage unit 28. The modular design facilitates maintenance, and the overall structure is compact, safe, and reliable.

[0068] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0069] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0070] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A full-automatic wireless charging intelligent door lock, characterized in that: The device includes a wireless charging transmitter module (1) and a wireless charging receiver module (2). The wireless charging transmitter module (1) is installed inside the door frame, and the wireless charging receiver module (2) is installed on the door panel. The wireless charging transmitter module (1) receives power from the wireless charging receiver module (1) and supplies power to the door lock. The wireless charging transmitter module (1) and the wireless charging receiver module (2) automatically align when the door is closed to achieve contactless power transmission.

2. The full-automatic wireless charging intelligent door lock according to claim 1, characterized in that: The wireless charging transmitter module (1) includes a transmitter box (11) fixed on a locking plate (4). The transmitter box (11) includes a transmitter motherboard (12) and a transmitter coil (13). The transmitter motherboard (12) is connected to an external power supply.

3. The full-automatic wireless charging intelligent door lock according to claim 2, characterized in that: The transmitting motherboard (12) integrates a resonant matching circuit, and the transmitting coil (13) is embedded in the side of the transmitting box (11) facing the door panel.

4. The full-automatic wireless charging smart door lock according to claim 1, characterized in that: The wireless charging receiver module (2) includes a receiver box (25), which contains a receiver coil (26), a receiver motherboard (27), and an energy storage device (28). The receiver coil (26) receives the power from the wireless charging transmitter module (1) and stores it in the energy storage device (28) through the receiver motherboard (27). The receiver motherboard (27) is electrically connected to the door lock motherboard (20) to supply power to the drive components of the lock body (3).

5. The full-automatic wireless charging smart door lock according to claim 4, characterized in that: The receiving motherboard (27) integrates a rectifier and filter circuit and a voltage regulation module. The rectifier and filter circuit converts the AC power of the receiving coil (26) into DC power, and the voltage regulation module stabilizes the DC power to the charging voltage of the energy storage device (28).

6. The full-automatic wireless charging smart door lock according to claim 4, characterized in that: The energy storage device (28) adopts a rechargeable electrochemical energy storage device, including a lithium battery, a supercapacitor or a combination of the two; when a rechargeable battery is used, the receiving motherboard (27) integrates a battery protection circuit, including overcharge protection, over-discharge protection and short circuit protection modules.

7. The full-automatic wireless charging smart door lock according to claim 4, characterized in that: The receiver box (25) is detachably installed inside the power supply box (21). The power supply box (21) is fixedly installed above the lock body (3). The power supply box (21) includes a detachable power supply box cover (22) and a main board (20). The main board (20) and the receiver box (25) are respectively installed in the main board compartment (24) and the power compartment (23) of the power supply box (21). The power supply box (21) has a wire hole (221) for the connection wire between the main board (20) and the lock body (3) to pass through.

8. The full-automatic wireless charging smart door lock according to claim 2, characterized in that: The transmitting coil (13) and the receiving coil (26) are matched, and the deviation of the central axis does not exceed 3mm when the door is closed; both the transmitting coil (13) and the receiving coil (26) adopt a flat spiral structure, and the outer side of the coil is wrapped with a ferrite shielding layer.

9. A fully automatic wireless charging smart door lock according to claim 1, characterized in that: The wireless charging transmitter module (1) also includes a door status detection unit, which is a Hall sensor. When the door is closed, the Hall sensor outputs a trigger signal to the transmitter motherboard (12) to start wireless charging; when the door is open, the transmitter motherboard (12) stops supplying power.

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