Power management method and system for intelligent electric hinge

Abstract

The invention discloses a power management method and system for an intelligent electric hinge. The method comprises the steps that primary temperature control is conducted on a circuit board and a power storage module of a door leaf receiving end; the door frame transmitting end adopts a full-bridge LLC resonant inverter circuit and drives a transmitting coil at specified high frequency, and after the door leaf receiving end receives electric energy, a synchronous rectification circuit is adopted for rectification to obtain initial voltage; the power management module carries out constant current-constant voltage equalizing charging on the battery pack in the power storage module, and carries out secondary temperature control on the receiving end circuit board according to a temperature threshold value; and a DC-DC unit in the power management module is utilized to convert the initial voltage or the power supply voltage of the power storage module according to the request of the multi-path function module and the control instruction of the power management module, and multi-path output voltage is obtained respectively. Smooth operation of each functional module is guaranteed, and power consumption in the electric energy conversion process is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of power management technology for electric hinges, and particularly to a power management method and system for intelligent electric hinges. Background Technology

[0002] Smart furniture represents an efficient lifestyle sought after by modern people, while intelligent access control and security management systems are a new type of modern security management system. It integrates microcomputer automatic identification technology and modern security management measures, involving numerous new technologies such as electronics, mechanics, optics, computer technology, communication technology, and biotechnology. It is suitable for various confidential departments, and existing electric hinge devices can be opened and closed by sending control signals.

[0003] However, since motorized hinges are installed on the door leaf, wiring is not suitable, and dry-cell batteries cannot meet the continuous power supply requirements of smart access control systems, thus limiting the functions that the various modules in the smart access control system can perform. To expand the functionality of smart access control systems, wireless charging motorized hinges have emerged on the market. However, existing wireless charging motorized hinges suffer from excessive power consumption and lack of effective temperature control during power conversion and supply, leading to a decline in their power output performance. Summary of the Invention

[0004] In existing technologies, wireless charging electric hinges suffer from excessive power consumption and lack of effective temperature control during the power conversion and supply process, leading to a decline in their power output performance.

[0005] To address the aforementioned issues, a power management method and system for intelligent electric hinges is proposed. This method effectively controls the temperature of the circuit board at the door receiving end by performing primary temperature control on the circuit board and energy storage module, and secondary temperature control on the receiving end circuit board based on temperature thresholds. This ensures the smooth operation of each functional module. Furthermore, by employing a full-bridge LLC resonant inverter circuit at the door frame transmitting end and driving the transmitting coil to output electrical energy at a specified high frequency, and then rectifying the received electrical energy using a synchronous rectifier circuit, the power consumption during the energy conversion process is effectively reduced.

[0006] In a first aspect, a power management method for an intelligent electric hinge includes: Step 100: Provide a power management system for an intelligent electric hinge, which performs temperature control on the circuit board and energy storage module at the door receiving end; Step 200: A full-bridge LLC resonant inverter circuit is used at the door frame transmitter end of the intelligent electric hinge, and the transmitting coil is driven at a specified high frequency to output electrical energy. After receiving the electrical energy at the door leaf receiver end of the intelligent electric hinge, a synchronous rectifier circuit is used to rectify it to obtain a preliminary voltage. Step 300: Input the initial voltage into the power management module. The power management module performs constant current-constant voltage equalization charging on the battery pack in the energy storage module and performs secondary temperature control on the receiving circuit board according to the temperature threshold. Step 400: Using the DC-DC unit in the power management module, the initial voltage or the power supply voltage of the energy storage module is converted according to the request of the multi-function module and the control command of the power management module to obtain multiple output voltages and simultaneously power multiple function modules. The multiple functional modules include an intelligent display module, a fingerprint module, and a control module.

[0007] In conjunction with the power management method for the intelligent electric hinge described in the first aspect of the present invention, in a first possible embodiment, step 100 includes: Step 110: Solder the circuit board of the door receiving end to the aluminum heat dissipation substrate, and then solder the aluminum heat dissipation substrate to the light steel frame of the door. Step 120: Leave a 2-3mm heat dissipation gap between the battery packs in the energy storage module, fill the heat dissipation gap with a thermally conductive silicone pad, and connect the thermally conductive silicone pad to the heat dissipation substrate to facilitate heat conduction.

[0008] In conjunction with the power management method for the intelligent electric hinge described in the first aspect of the present invention, in a second possible embodiment, step 200 includes: Step 210: Use the full-bridge inverter arm in the full-bridge LLC resonant inverter circuit to invert the bus voltage into a high-frequency square wave voltage; Step 220: The high-frequency square wave voltage is shaped into a quasi-sine wave voltage using the LLC resonant network in the full-bridge LLC resonant inverter circuit, and then resonantly matched with the transmitting coil to transmit electrical energy. Step 230: The receiving coil at the receiving end of the door frame induces the quasi-sinusoidal voltage, which is then rectified using an H-bridge synchronous rectifier circuit to obtain the preliminary voltage.

[0009] In conjunction with the second possible implementation of the first aspect of the present invention, in the third possible implementation, step 300 includes: Step 310: In the initial stage of charging the battery pack, constant current charging is performed, and the total voltage of the battery pack gradually increases. Step 320: After the total voltage of the battery pack reaches the rated voltage, constant voltage charging is performed, and the charging current gradually decreases. Step 330: Monitor the voltage difference between individual cells in the battery pack during the constant current charging stage and the constant voltage charging stage in real time. If the voltage difference is greater than the first voltage difference threshold, then initiate passive equalization. The passive equalization involves discharging high-voltage cells to lower the voltage difference.

[0010] In conjunction with the third possible implementation of the first aspect of the present invention, in the fourth possible implementation, step 300 further includes: Step 340: If the voltage difference is less than the second voltage difference threshold, then turn off passive equalization; Step 350: Perform trickle charging to keep the battery pack fully charged; Wherein, the second differential pressure threshold is less than the first differential pressure threshold.

[0011] In conjunction with the second possible implementation of the first aspect of the present invention, in the fifth possible implementation, step 300 further includes: Step 360: Monitor the temperature of the circuit board of the door receiving end in real time. If it is greater than the first temperature threshold, reduce the output current of the circuit board of the door receiving end. Step 370: Monitor the temperature of the circuit board at the receiving end of the door leaf in real time. If it exceeds the second temperature threshold, forcibly cut off the current output of the circuit board. Wherein, the second temperature threshold is greater than the first temperature threshold.

[0012] Secondly, a power management system for an intelligent electric hinge, employing the power management method for the intelligent electric hinge described in the first aspect, includes: Door frame transmitter; Door panel receiver; The gate frame transmitter is used to output electrical energy by employing a full-bridge LLC resonant inverter circuit and driving the transmitting coil at a specified high frequency. The door receiving end performs temperature control by fixing and assembling the circuit board, including: The power management module is used to perform constant current-constant voltage equalization charging of the battery pack in the energy storage module, and to perform secondary temperature control on the receiving circuit board according to the temperature threshold. The power management module includes: The DC-DC unit is used to convert the initial voltage or the power supply voltage of the energy storage module according to the requests of the multi-function modules and the control instructions of the power management module, so as to obtain multiple output voltages and simultaneously power multiple function modules.

[0013] In conjunction with the power management system for the intelligent electric hinge described in the second aspect of the present invention, in a first possible embodiment, the full-bridge LLC resonant inverter circuit includes: The full-bridge inverter arm is used to invert the bus voltage into a high-frequency square wave voltage; An LLC resonant network is used to shape the high-frequency square wave voltage into a quasi-sinusoidal voltage and to resonate and match it with the transmitting coil. A transmitting coil is used to transmit electrical energy.

[0014] In conjunction with the first possible embodiment of the second aspect of the present invention, in the second possible embodiment, the step of performing temperature control through the fixed assembly of the circuit board includes: The circuit board of the door receiving end is soldered onto an aluminum heat dissipation substrate, and the aluminum heat dissipation substrate is soldered onto the light steel frame of the door. A 2-3mm heat dissipation gap is reserved between the battery packs in the energy storage module. The heat dissipation gap is filled with a thermally conductive silicone sheet, and the thermally conductive silicone sheet is connected to the heat dissipation substrate to facilitate heat conduction.

[0015] In conjunction with the second possible embodiment of the second aspect of the present invention, in the third possible embodiment, the secondary temperature control of the receiving circuit board based on a temperature threshold includes: The temperature of the circuit board at the door receiving end is monitored in real time. If it exceeds the first temperature threshold, the output current of the circuit board at the door receiving end is reduced. If it exceeds the second temperature threshold, the current output of the circuit board is forcibly cut off. Wherein, the second temperature threshold is greater than the first temperature threshold.

[0016] The power management method and system for the intelligent electric hinge described in this invention effectively control the temperature of the circuit board at the door receiving end by performing primary temperature control on the circuit board and energy storage module and secondary temperature control on the circuit board at the receiving end based on a temperature threshold, thereby ensuring the smooth operation of each functional module. By using a full-bridge LLC resonant inverter circuit at the door frame transmitting end and driving the transmitting coil to output electrical energy at a specified high frequency, and then rectifying the electrical energy received at the door receiving end using a synchronous rectifier circuit, the power consumption during the power conversion process is effectively reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of one embodiment of a power management method for an intelligent electric hinge according to the present invention; Figure 2 for Figure 1 A schematic diagram of a specific implementation of step 100 in the diagram; Figure 3 for Figure 1 A schematic diagram of a specific implementation of step 200 in the diagram; Figure 4 for Figure 1 A schematic diagram of a specific implementation of step 300 in the process; Figure 5 for Figure 4 A schematic diagram of a specific implementation method following step 330; Figure 6 for Figure 5 A schematic diagram of a specific implementation method following step 350; Figure 7 This is a structural diagram of an intelligent electric hinge according to the present invention; Figure 8 This is a schematic diagram of one embodiment of the power management system for an intelligent electric hinge according to the present invention. Figure 9 This is a schematic diagram of one embodiment of the power management system for an intelligent electric hinge in this invention, showing the door frame transmitter. Figure 10 This is a schematic diagram of one embodiment of the door leaf receiver in the power management system of an intelligent electric hinge according to the present invention. Detailed Implementation

[0019] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are all within the scope of protection of this invention.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings of this application are intended to cover non-exclusive inclusion.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In existing technologies, wireless charging electric hinges suffer from excessive power consumption and lack of effective temperature control during the power conversion and supply process, leading to a decline in their power output performance.

[0024] To address the above problems, a power management method and system for intelligent electric hinges are proposed.

[0025] Firstly, a power management method for intelligent electric hinges, such as... Figure 1 , Figure 1 This is a schematic diagram of one embodiment of a power management method for an intelligent electric hinge according to the present invention; including: Step 100: Provide a power management system for an intelligent electric hinge, and perform temperature control on the circuit board and energy storage module of the door receiving end 20.

[0026] In one possible implementation, such as Figure 2 , Figure 2 for Figure 1 A schematic diagram of a specific implementation of step 100 is shown below; step 100 includes: step 110, welding the circuit board of the door receiving end 20 onto the aluminum heat dissipation substrate, and welding the aluminum heat dissipation substrate onto the light steel frame of the door; step 120, leaving a 2-3mm heat dissipation gap between the battery packs in the energy storage module, filling the heat dissipation gap with thermally conductive silicone pads, and connecting the thermally conductive silicone pads to the heat dissipation substrate to facilitate heat conduction.

[0027] like Figure 7 , Figure 7 This is a structural diagram of an intelligent electric hinge according to the present invention. The electric hinge includes a housing 101 accommodating a door frame transmitter 10, a housing 201 accommodating a door leaf receiver 20, and a hinge body 301 connected between the two. Figure 7 One transmitter 10 for the door frame and one receiver 20 for the door leaf can be set at the top and bottom respectively.

[0028] In this embodiment, the heat dissipation module in the circuit board of the door receiving end 20 includes a power management module 22 (BMS), a MOSFET, and a DC-DC unit 221. It is recommended that the door have a built-in light steel frame, allowing the circuit board to be soldered onto an aluminum heat dissipation substrate. The heat dissipation substrate is attached to the metal frame inside the door, using the metal frame as a heat dissipation extension. A 2-3mm heat dissipation gap is reserved between the lithium battery packs, filled with thermally conductive silicone pads to conduct heat from the battery cells to the heat dissipation substrate. The battery pack casing uses a perforated metal shell to enhance internal airflow.

[0029] Step 200: A full-bridge LLC resonant inverter circuit is used at the door frame transmitter 10 of the intelligent electric hinge to drive the transmitter coil 13 at a specified high frequency and output electrical energy. After receiving the electrical energy at the door leaf receiver 20 of the intelligent electric hinge, the synchronous rectifier circuit 21 is used to rectify it to obtain a preliminary voltage.

[0030] In one possible implementation, such as Figure 3 , Figure 3 for Figure 1 A schematic diagram of a specific implementation of step 200; step 200 includes: Step 210: The bus voltage is inverted into a high-frequency square wave voltage using the full-bridge inverter arm 11 in the full-bridge LLC resonant inverter circuit; Step 220: The high-frequency square wave voltage is shaped into a quasi-sinusoidal voltage using the LLC resonant network 12 in the full-bridge LLC resonant inverter circuit, and resonantly matched with the transmitting coil 13, and the electrical energy is transmitted through the transmitting coil 13; Step 230: The receiving coil at the receiving end of the gate frame induces a quasi-sinusoidal voltage, which is rectified by the H-bridge synchronous rectifier circuit 21 to obtain a preliminary voltage.

[0031] In this embodiment, the full-bridge inverter arm 11 can be implemented as follows: four MOSFETs (Q1 / Q4 as the upper arm, Q2 / Q3 as the lower arm) form an H-bridge to invert the DC bus voltage VDC into a high-frequency square wave voltage; the LLC resonant network 12 can be implemented as follows: it consists of a resonant inductor Lr, a resonant capacitor Cr, and a magnetizing inductor Lm. Lm is usually combined with the magnetizing inductor of the transmitting coil 13 (the inductance of the wireless charging coil itself can also serve as Lm, reducing discrete components); the transmitting coil 13 transmits energy to the receiving end through magnetic coupling.

[0032] The door frame transmitter 10 adopts a full-bridge LLC resonant inverter circuit with a high-frequency (100-200kHz) drive coil, which helps reduce switching losses and improve grid-side efficiency. The electric hinge door leaf body has two built-in wireless charging receivers, one at the top and one at the bottom. The receiver uses a synchronous rectification circuit 21 to replace the traditional diode rectification, reducing rectification losses (synchronous rectification losses are only 1 / 5 of diode losses) and adapting to high-power transmission. At the same time, the initial voltage output by the wireless charging receiver is 2-3V higher than the full-charge voltage of the battery pack in the energy storage module (for example, the full-charge voltage of a 24V battery pack is about 29.2V, and the initial voltage output by the receiver needs to be 30-32V) to meet the charging needs of the battery pack.

[0033] In one specific embodiment, the door panel's built-in battery selection is as follows: 24V, using either 8-cell lithium iron phosphate (29.2V fully charged) or 6-cell ternary lithium (25.2V fully charged), with a maximum output current of 12A. The battery cells support a discharge rate of ≥2C (for example, a 20Ah battery cell can continuously discharge up to 40A, meeting the 12A requirement); the capacity is based on the device's battery life to ensure that the device can continue to work for several hours after a power outage.

[0034] Step 300: Input the initial voltage into the power management module 22. The power management module 22 performs constant current-constant voltage equalization charging on the battery pack in the energy storage module and performs secondary temperature control on the receiving circuit board according to the temperature threshold.

[0035] In one possible implementation, such as Figure 4 , Figure 4 for Figure 1 A schematic diagram of a specific implementation of step 300; step 300 includes: Step 310: In the initial stage of charging the battery pack, constant current charging is performed, and the total voltage of the battery pack gradually increases; Step 320: After the total voltage of the battery pack reaches the rated voltage, constant voltage charging is performed, and the charging current gradually decreases; Step 330: The voltage difference between each cell in the battery pack is monitored in real time during the constant current charging stage and the constant voltage charging stage. If the voltage difference is greater than the first voltage difference threshold, passive equalization is initiated; wherein, passive equalization involves discharging the high-voltage cells to lower the voltage difference.

[0036] In one possible implementation, such as Figure 5 , Figure 5 for Figure 4 A schematic diagram of a specific implementation following step 330; step 300 further includes: Step 340: If the voltage difference is less than the second voltage difference threshold, then turn off passive equalization; Step 350: Perform trickle charging to keep the battery pack fully charged; wherein, the second voltage difference threshold is less than the first voltage difference threshold.

[0037] In this embodiment, before reaching the rated voltage, constant current charging (CC) is performed: Buck outputs constant current (0.5C), and the total voltage of the battery pack rises; the BMS monitors the voltage difference of individual cells in real time, and when the voltage difference is >50mV (first voltage difference threshold), the corresponding cell passive balancing is initiated; when the rated voltage of the battery pack reaches the rated voltage, constant voltage charging (CV) is performed, the charging current gradually decreases, and balancing is carried out throughout the process until the voltage difference of all individual cells is ≤20mV (second voltage difference threshold), the balancing function is turned off, and trickle charging (0.05C) is entered to maintain a fully charged state.

[0038] In one possible implementation, such as Figure 6 , Figure 6 for Figure 5 A schematic diagram of a specific implementation following step 350; step 300 further includes: Step 360: Monitor the temperature of the circuit board of the door receiving end 20 in real time. If it is greater than the first temperature threshold, reduce the output current of the circuit board of the door receiving end 20. Step 370: Monitor the temperature of the circuit board of the door receiving end 20 in real time. If it is greater than the second temperature threshold, forcibly cut off the current output of the circuit board. The second temperature threshold is greater than the first temperature threshold.

[0039] In this embodiment, when the temperature exceeds the first temperature threshold of 65°C, the output current is automatically reduced (current limiting); when the temperature exceeds the second temperature threshold of 75°C, the output is forcibly cut off to avoid thermal runaway.

[0040] It is worth noting that a foreign object detection (FOD) circuit can be built into the door frame transmitter 10. When a metal foreign object such as a coin or key is present in the hinge gap, the power will be automatically reduced or the transmission will be stopped to prevent the foreign object from overheating. Redundancy can also be designed for the receiver output circuit. The BMS uses dual outputs, and when one DC-DC module fails, the other can automatically switch to ensure uninterrupted power supply.

[0041] Step 400: Using the DC-DC unit 221 in the power management module 22, the initial voltage or the power supply voltage of the energy storage module is converted according to the request of the multi-function module and the control command of the power management module 22 to obtain multiple output voltages, and power the function modules at the same time.

[0042] In this embodiment, the DC-DC unit 221 includes a boost circuit and a buck circuit. For example, if the battery pack is 24V and a 12V output is required, a buck module is used; if the battery pack is 12V and a 24V output is required, a boost module is used. Multiple output branches can be included to simultaneously power different functional modules, such as simultaneously powering two branches: 24V, 3A and 12V, 8A.

[0043] It is worth noting that the emergency power supply can be reset in the system. The output voltage of the emergency power supply can be converted by the power management module to power the functional modules.

[0044] In this embodiment, when supplying power, it can be implemented as follows: When the door is open, wireless power supply is paused, and the system consumes the energy stored in the battery module. When the door is closed, wireless charging and power supply resume.

[0045] In this embodiment, multiple functional modules include an intelligent display module (such as a display screen), a fingerprint module (such as a fingerprint lock control module), and a control module. By performing primary temperature control on the circuit board and energy storage module of the door receiver 20, and secondary temperature control on the receiver circuit board based on a temperature threshold, the temperature of the circuit board of the door receiver 20 is effectively controlled, thereby ensuring the smooth operation of each functional module. By employing a full-bridge LLC resonant inverter circuit at the door frame transmitter 10 and driving the transmitter coil 13 to output electrical energy at a specified high frequency, the door receiver 20 receives the electrical energy and rectifies it using a synchronous rectifier circuit 21, effectively reducing power consumption during the energy conversion process.

[0046] Secondly, a power management system for intelligent electric hinges, such as... Figure 8-10 , Figure 8 This is a schematic diagram of one embodiment of the power management system for an intelligent electric hinge according to the present invention. Figure 9 This is a schematic diagram of one embodiment of the door frame transmitter 10 in the power management system of an intelligent electric hinge according to the present invention. Figure 10 This is a schematic diagram of one embodiment of the power management system for an intelligent electric hinge according to the present invention, specifically the door leaf receiver 20. The power management method for the intelligent electric hinge, based on the first aspect, includes a door frame transmitter 10 and a door leaf receiver 20. The door frame transmitter 10 outputs electrical energy by using a full-bridge LLC resonant inverter circuit and driving a transmitting coil 13 at a specified high frequency. The door leaf receiver 20 performs primary temperature control through a fixed assembly of the circuit board, including a power management module 22. This module performs constant current-constant voltage equalization charging of the battery pack in the energy storage module and performs secondary temperature control of the receiver circuit board based on a temperature threshold. The power management module 22 includes a DC-DC unit 221, which converts the initial voltage or the supply voltage of the energy storage module according to requests from multiple functional modules and control commands from the power management module 22, obtaining multiple output voltages and simultaneously supplying power to the functional modules.

[0047] In one possible implementation, the full-bridge LLC resonant inverter circuit includes: Full-bridge inverter arm 11 is used to invert the bus voltage into a high-frequency square wave voltage. LLC resonant network 12 is used to shape high-frequency square wave voltage into quasi-sinusoidal voltage and resonate with transmitting coil 13 in conjunction with the transmitting coil 13. The transmitting coil 13 is used to transmit electrical energy.

[0048] In one possible implementation, temperature control is achieved by fixing the circuit board, including: soldering the circuit board of the door receiving end 20 to an aluminum heat dissipation substrate, and soldering the aluminum heat dissipation substrate to the light steel frame of the door; leaving a 2-3mm heat dissipation gap between the battery packs in the energy storage module, filling the heat dissipation gap with thermally conductive silicone pads, and connecting the thermally conductive silicone pads to the heat dissipation substrate to facilitate heat conduction.

[0049] In one possible implementation, secondary temperature control of the receiving circuit board is performed based on a temperature threshold, including: The temperature of the circuit board of the door receiver 20 is monitored in real time. If it exceeds the first temperature threshold, the output current of the circuit board of the door receiver 20 is reduced. If it exceeds the second temperature threshold, the current output of the circuit board is forcibly cut off. The second temperature threshold is greater than the first temperature threshold.

[0050] The power management method and system for the intelligent electric hinge described in this invention effectively control the temperature of the circuit board of the door receiving end 20 by performing primary temperature control on the circuit board and energy storage module of the door receiving end 20 and secondary temperature control on the receiving end circuit board according to the temperature threshold, thereby ensuring the smooth operation of each functional module. By using a full-bridge LLC resonant inverter circuit at the door frame transmitting end 10 and driving the transmitting coil 13 to output electrical energy at a specified high frequency, the door receiving end 20 receives the electrical energy and rectifies it using a synchronous rectifier circuit 21, effectively reducing the power consumption during the power conversion process.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power management method of an intelligent electric hinge, characterized in that comprising: Step 100, providing a power management system of an intelligent electric hinge, performing primary temperature control on a circuit board and a power storage module of a door leaf receiving end; Step 200, adopting a full-bridge LLC resonant inverter circuit at a door frame transmitting end of the intelligent electric hinge, and transmitting a coil with a specified high-frequency drive to output electric energy, and adopting a synchronous rectification circuit to rectify the electric energy received by a door leaf receiving end of the intelligent electric hinge to obtain a preliminary voltage; Step 300, inputting the preliminary voltage into a power management module, and performing constant-current and constant-voltage equalization charging on a battery pack in the power storage module, and performing secondary temperature control on the receiving end circuit board according to a temperature threshold; Step 400, using a DC-DC unit in the power management module to convert the preliminary voltage or the power supply voltage of the power storage module according to a request of a multi-path function module and a control instruction of the power management module to obtain a plurality of output voltages, and simultaneously supplying power to a plurality of function modules; Wherein, the plurality of function modules include an intelligent display module, a fingerprint module, and a control module.

2. The power management method of the smart motorized hinge according to claim 1, characterized in that, The step 100 comprises: Step 110, welding the circuit board of the door leaf receiving end on an aluminum heat dissipation substrate, and welding the aluminum heat dissipation substrate on a light steel framework of the door leaf; Step 120, reserving a 2-3mm heat dissipation gap between the battery pack in the power storage module, filling the heat dissipation gap with a heat-conducting silica gel sheet, and connecting the heat-conducting silica gel sheet with the heat dissipation substrate for heat conduction.

3. The power management method of the smart motorized hinge according to claim 1, wherein, The step 200 comprises: Step 210, using a full-bridge inverter arm in the full-bridge LLC resonant inverter circuit to invert a bus voltage into a high-frequency square wave voltage; Step 220, using an LLC resonant network in the full-bridge LLC resonant inverter circuit to shape the high-frequency square wave voltage into a quasi-sine wave voltage, and jointly resonating and matching with the transmitting coil to transmit electric energy through the transmitting coil; Step 230, the receiving coil of the door frame receiving end induces the quasi-sine wave voltage, and obtains the preliminary voltage after rectification by an H-bridge synchronous rectification circuit.

4. The power management method of the smart motorized hinge according to claim 3, wherein, The step 300 comprises: Step 310, performing constant-current charging in an initial charging stage of the battery pack, and gradually increasing a total voltage of the battery pack; Step 320, performing constant-voltage charging after the total voltage of the battery pack reaches a rated voltage, and gradually reducing a charging current; Step 330, monitoring a voltage difference between each single cell in the battery pack in the constant-current charging stage and the constant-voltage charging stage in real time, and starting passive equalization if the voltage difference is greater than a first voltage difference threshold. The step 300 further comprises:

5. The power management method of the smart motorized hinge according to claim 4, wherein, Step 340, closing the passive equalization if the voltage difference is less than a second voltage difference threshold; Step 350, performing trickle charging to maintain a full charge state of the battery pack; Wherein, the second voltage difference threshold is less than the first voltage difference threshold. The step 300 further comprises:

6. The power management method of the smart motorized hinge according to claim 3, wherein, ​ Step 360, real-time monitoring of the temperature of the circuit board of the door leaf receiving end, if greater than the first temperature threshold, reduce the output current of the circuit board of the door leaf receiving end; Step 370, real-time monitoring of the temperature of the circuit board of the door leaf receiving end, if greater than the second temperature threshold, forcedly cut off the circuit board current output; Wherein, the second temperature threshold is greater than the first temperature threshold.

7. A power management system for a smart motorized hinge, employing the power management method for a smart motorized hinge according to any one of claims 1-6, characterized in that, Including: Door frame transmitting end; Door leaf receiving end; The door frame transmitting end is used to output electric energy by adopting full-bridge LLC resonant inverter circuit and driving the transmitting coil at a specified high frequency; The door leaf receiving end is controlled once by fixedly assembling the circuit board, including: The power management module is used to balance charge the battery pack in the power storage module at constant current and constant voltage, and to control the receiving end circuit board twice according to the temperature threshold; The power management module includes: The DC-DC unit is used to convert the primary voltage or the power supply voltage of the power storage module according to the request of the multi-channel functional module and the control instruction of the power management module, to obtain multiple output voltages respectively, and to supply power to multiple functional modules at the same time.

8. The power management system of the intelligent motorized hinge according to claim 7, characterized in that, The full-bridge LLC resonant inverter circuit includes: Full-bridge inverter bridge arm, used to invert the bus voltage into high-frequency square wave voltage; LLC resonant network, used to shape the high-frequency square wave voltage into quasi-sine wave voltage, and to match with the transmitting coil in resonance; Transmitting coil, used to emit electric energy.

9. The power management system of the intelligent motorized hinge according to claim 8, characterized in that, The control once by fixedly assembling the circuit board includes: The circuit board of the door leaf receiving end is welded on the aluminum heat dissipation substrate, and the aluminum heat dissipation substrate is welded on the light steel framework of the door leaf; Reserve 2-3mm heat dissipation gap between the battery pack in the power storage module, fill the heat-conducting silica gel sheet in the heat dissipation gap, and connect the heat-conducting silica gel sheet with the heat dissipation substrate for heat conduction.

10. The power management system of the intelligent motorized hinge according to claim 9, wherein, The control twice according to the temperature threshold includes: Real-time monitoring of the temperature of the circuit board of the door leaf receiving end, if greater than the first temperature threshold, reduce the output current of the circuit board of the door leaf receiving end, if greater than the second temperature threshold, forcedly cut off the circuit board current output; Wherein, the second temperature threshold is greater than the first temperature threshold.

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