Low-power-consumption intelligent door lock

Abstract

The utility model discloses a low-power-consumption intelligent door lock which comprises an MCU (Microprogrammed Control Unit), a first power supply module, a second power supply module and a self-locking module, the first power supply module and the second power supply module are electrically connected with the self-locking module and the MCU respectively, and are used for supplying power to a circuit load through the self-locking module; and the self-locking module is electrically connected with the MCU and is used for carrying out self-locking according to a control instruction of the MCU and stopping supplying power to a circuit load when the power is low. Through the arrangement of the self-locking module and the MCU, when the MCU detects that the electric quantity is low and is not used for a long time, the MCU outputs a low level, and the whole power supply system is closed, so that a battery discharge loop is reduced, the power consumption of the whole machine is reduced, the purpose of prolonging the standby is achieved, the electric quantity is effectively saved, and the unnecessary waste of the electric quantity is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the power supply technical field of intelligent door lock especially relates to a low -power consumption intelligent door lock. BACKGROUND

[0002] Now intelligent door lock adopts two way battery power supply, one way uses 4 section 5 no. dry battery direct power supply, until the battery capacity is low, still there is still big standby current of current, as long as there is wake -up interrupt signal generation, the whole machine will automatically detect and start.

[0003] Another way uses lithium battery power supply, at this moment also same in using to low electricity, still there is big standby current phenomenon all the time, like this remaining battery capacity has not obtained the full effective use, most of the remaining battery capacity, in the invalid scene application is wasted. UTILITY MODEL CONTENTS

[0004] The existing battery power supply intelligent door lock, the remaining battery capacity has not obtained the full effective use, most of the remaining battery capacity, in the invalid scene is wasted.

[0005] In view of the above problem, a low -power consumption intelligent door lock is provided, by setting the self -locking module and MCU, when the MCU detects that the battery capacity is low, and there is no use for a long time, the MCU outputs low level, and the whole power supply system is closed, the battery discharge loop is reduced, the power consumption of the whole machine is reduced, the standby time is prolonged, the battery capacity is effectively saved, and unnecessary battery capacity is wasted.

[0006] A low -power consumption intelligent door lock, comprising:

[0007] MCU;

[0008] First power supply module;

[0009] Second power supply module;

[0010] Self -locking module;

[0011] The first power supply module, second power supply module is connected with the self -locking module and the MCU respectively, is used for supplying power to the circuit load through the self -locking module;

[0012] The self -locking module is connected with the MCU, and is used for locking according to the MCU control instruction when the battery capacity is low, and stopping power supply to the circuit load.

[0013] In the first possible implementation of the low -power consumption intelligent door lock, the first power supply module comprises:

[0014] First switch unit and first switch control unit;

[0015] The first switch unit is electrically connected with the dry battery and the self-locking module respectively, and is used for controlling the switch of the dry battery power supply.

[0016] The first switch control unit is electrically connected with the first switch unit and the MCU respectively, and is used for lowering the level according to the control signal, and closing the dry battery power supply.

[0017] In the second possible implementation manner of the low-power-consumption intelligent door lock, the second power supply module comprises:

[0018] The second switch unit and the second switch control unit;

[0019] The second switch unit is electrically connected with the lithium battery and the self-locking module respectively, and is used for controlling the switch of the lithium battery power supply.

[0020] The second switch control unit is electrically connected with the second switch unit and the MCU respectively, and is used for lowering the level according to the control signal, and closing the lithium battery power supply.

[0021] In the third possible implementation manner of the low-power-consumption intelligent door lock, the self-locking module comprises:

[0022] The third switch unit;

[0023] The third switch control unit;

[0024] The output unit;

[0025] The third switch unit is electrically connected with the first switch unit, the second switch unit and the output unit, and the output unit is also electrically connected with the MCU, and is used for supplying power to the MCU.

[0026] The third switch control unit is electrically connected with the first switch unit, the second switch unit and the MCU, and is used for maintaining the third switch unit to be turned on when the power supply is normal, and maintaining the third switch unit to be closed when the power supply is low.

[0027] In the fourth possible implementation manner of the first possible implementation manner of the utility model, the first switch unit comprises:

[0028] The first MOS tube, the second MOS tube and the first resistor;

[0029] The drain of the first MOS tube is electrically connected with the dry battery, the gate of the first MOS tube is electrically connected with the first end of the first resistor and the gate of the second MOS tube after being connected in common, the first switch control unit is electrically connected, the source of the first MOS tube, the second end of the first resistor and the source of the second MOS tube are electrically connected, and the drain of the second MOS tube is electrically connected with the self-locking module.

[0030] In combination with the fourth possible implementation manner of the utility model, in the fifth possible implementation manner, the first switch control unit comprises:

[0031] The third MOS tube, the first capacitor and the second resistor;

[0032] The drain of the third MOS tube is electrically connected with the gate of the first MOS tube, the first end of the first resistor and the gate of the second MOS tube, the source of the third MOS tube is grounded, the gate of the third MOS tube is electrically connected with the first end of the first capacitor and the first end of the second resistor, and the second end of the first capacitor and the second end of the second resistor are grounded after being connected in common.

[0033] In combination with the second possible implementation manner of the utility model, in the sixth possible implementation manner, the second switch unit comprises:

[0034] The fourth MOS tube, the second capacitor, the third capacitor and the third resistor;

[0035] The first end of the second capacitor and the first end of the third capacitor are electrically connected with the drain of the fourth MOS tube, the second end of the second capacitor and the second end of the third capacitor are grounded, the fourth MOS tube is electrically connected with the first end of the third resistor and the self-locking module, and the gate of the fourth MOS tube is electrically connected with the second end of the third resistor and the second switch control unit.

[0036] In combination with the third possible implementation manner of the utility model, in the seventh possible implementation manner, the third switch unit comprises:

[0037] The fifth MOS tube and the fourth resistor;

[0038] The source of the fifth MOS tube is electrically connected with the first switch unit, the second switch unit and the first end of the fourth resistor, the gate of the fifth MOS tube is electrically connected with the third switch control unit and the second end of the fourth resistor, and the drain of the fifth MOS tube is electrically connected with the output unit.

[0039] In combination with the seventh possible implementation manner of the utility model, in the eighth possible implementation manner, the third switch control unit comprises:

[0040] The fourth capacitor, the fifth capacitor, the sixth MOS tube, the first voltage stabilizing tube and the fifth resistor;

[0041] The first end of the fourth capacitor is electrically connected with the first switch unit and the second switch unit, the second end of the fourth capacitor is electrically connected with the first end of the first voltage stabilizing tube, the first end of the fifth capacitor, the first end of the fifth resistor and the gate of the sixth MOS tube, the second end of the first voltage stabilizing tube is electrically connected with the MCU, the second end of the fifth capacitor, the second end of the fifth resistor and the source of the sixth MOS tube are grounded, and the drain of the sixth MOS tube is electrically connected with the gate of the fifth MOS tube.

[0042] In combination with the seventh possible implementation manner of the utility model, in the eighth possible implementation manner, the output unit comprises:

[0043] The sixth capacitor, the seventh capacitor and the eighth capacitor;

[0044] The first end of the sixth capacitor, the seventh capacitor and the eighth capacitor is electrically connected with the drain of the fifth MOS tube and the MCU respectively;

[0045] The second end of the sixth capacitor, the seventh capacitor and the eighth capacitor is grounded.

[0046] The low-power intelligent door lock is implemented, the self-locking module and the MCU are arranged, when the MCU detects that the power is low and is not used for a long time, the MCU outputs a low level, the whole power supply system is closed, the battery discharge circuit is reduced, the power consumption of the whole machine is reduced, the standby purpose is achieved, the power is effectively saved, and unnecessary power waste is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0048] Figure 1 It is a module structure diagram of the low-power intelligent door lock in the utility model;

[0049] Figure 2 It is a circuit structure diagram of the low-power intelligent door lock in the utility model;

[0050] Components and serial numbers:

[0051] 100 - first power supply module, 200 - second power supply module, 300 - self-locking module, 400 - MCU. DETAILED DESCRIPTION

[0052] The technical solutions in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0053] 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 the utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0054] It is to be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or indirectly on or connected to the other element by way of one or more other elements.

[0055] It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like as used herein refer to the orientation or position of the device or element shown in the drawings, and are used only for convenience and in the context of the present application and for simplifying the description, and therefore cannot be construed as indicating or implying that a specific orientation, configuration and operation of the device or element are required for the application, and therefore cannot be construed as limiting the application.

[0056] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0057] The existing battery-powered smart door lock does not fully and effectively utilize the remaining battery power, and most of the remaining battery power is wasted in invalid scenarios.

[0058] In view of the above problems, a low-power-consumption smart door lock is provided.

[0059] A low-power-consumption smart door lock, such as Figure 1 , Figure 1This is a module structure diagram of a low-power smart door lock according to the present invention; it includes an MCU400, a first power supply module 100, a second power supply module 200, and a self-locking module 300. The first power supply module 100 and the second power supply module 200 are electrically connected to the self-locking module 300 and the MCU400, respectively, and are used to supply power to the circuit load through the self-locking module 300. The self-locking module 300 is electrically connected to the MCU400 and is used to self-lock according to the control command of the MCU400 when the power is low, stopping the supply of power to the circuit load. By setting the self-locking module 300 and the MCU400, when the MCU400 detects low power and long-term inactivity, the MCU400 outputs a low level, shutting down the entire power system, reducing the battery discharge circuit, reducing the overall power consumption, achieving the purpose of extending standby time, effectively conserving power, and reducing unnecessary power waste.

[0060] In this embodiment, the first power supply module 100 is powered by dry cell batteries (DRY_BAT), for example, a set of four 6V dry cell batteries can be used as the power supply for the smart lock, serving both energy storage and energy supply functions, providing power to the smart lock. The first power supply module 100 is also powered by lithium batteries (VBAT_Li), for example, a 4.2V lithium battery can be used, similarly serving as the power supply for the smart lock, providing power to the smart lock. When the battery level is low, the self-locking module 300 shuts off the entire device's power supply, minimizing overall power consumption and reducing the impact of the smart lock's power consumption on battery standby time.

[0061] Furthermore, the first power supply module 100 includes a first switch unit and a first switch control unit; the first switch unit is electrically connected to the dry cell battery and the self-locking module 300 respectively, and is used to control the switch of the dry cell battery power supply; the first switch control unit is electrically connected to the first switch unit and the MCU 400 respectively, and is used to pull down the level according to the control signal to turn off the dry cell battery power supply.

[0062] In this embodiment, the first switch control unit is connected to the MCU400 via pin VUSB.

[0063] Furthermore, the second power supply module 200 includes a second switch unit and a second switch control unit; the second switch unit is electrically connected to the lithium battery and the self-locking module 300 respectively, and is used to control the switch for power supply to the lithium battery; the second switch control unit is electrically connected to the second switch unit and the MCU 400 respectively, and is used to pull down the level according to the control signal to turn off the power supply to the lithium battery.

[0064] In this embodiment, the second switch control unit is connected to MCU400 via pin VUSB and pin MCU400_BAT_SWITCH.

[0065] Furthermore, the self-locking module 300 includes a third switch unit, a third switch control unit, and an output unit; the third switch unit is electrically connected to the first switch unit, the second switch unit, and the output unit respectively, and the output unit is also electrically connected to the MCU400 for supplying power to the MCU400; the third switch control unit is electrically connected to the first switch unit, the second switch unit, and the MCU400 respectively, and is used to keep the third switch unit on when the power supply is normal and to keep the third switch unit off when the power supply is low, according to the control signal.

[0066] In this embodiment, the third switch control unit is electrically connected to the MCU400 via the pin MCU400_SYS_SHUTDOWN, and the output unit is electrically connected to the MCU400 via VSYS to provide power.

[0067] Specifically, such as Figure 2 The first switching unit includes a first MOSFET Q44, a second MOSFET Q45, and a first resistor R425. The drain of the first MOSFET Q44 is electrically connected to the dry cell battery. The gate of the first MOSFET Q44, the first terminal of the first resistor R425, and the gate of the second MOSFET Q45 are connected together and then electrically connected to the first switching control unit. The source of the first MOSFET Q44, the second terminal of the first resistor R425, and the source of the second MOSFET Q45 are electrically connected. The drain of the second MOSFET Q45 is electrically connected to the self-locking module 300.

[0068] Specifically, such as Figure 2 The first switch control unit includes: a third MOSFET Q28, a first capacitor C617, and a second resistor R429; the drain of the third MOSFET Q28 is electrically connected to the gate of the first MOSFET Q28, the first end of the first resistor R, and the gate of the second MOSFET Q28; the source of the third MOSFET Q28 is grounded; the gate of the third MOSFET Q28 is electrically connected to the first end of the first capacitor C617 and the first end of the second resistor R429; the second end of the first capacitor C617 and the second end of the second resistor R429 are connected together and then grounded.

[0069] Specifically, such as Figure 2 The second switching unit includes a fourth MOSFET Q20, a second capacitor C622, a third capacitor C623, and a third resistor R435. The first terminal of the second capacitor C622 and the first terminal of the third capacitor C623 are electrically connected to the drain of the fourth MOSFET Q20. The second terminals of the second capacitor C622 and the second terminals of the third capacitor C623 are grounded. The first terminal of the fourth MOSFET Q20 is electrically connected to the first terminal of the third resistor R435 and the self-locking module 300. The gate of the fourth MOSFET Q20 is electrically connected to the second terminal of the third resistor R435 and the second switching control unit.

[0070] Specifically, such as Figure 2The third switch unit includes a fifth MOS tube Q25 and a fourth resistor R427; a source of the fifth MOS tube Q25 is electrically connected with the first switch unit, the second switch unit and a first end of the fourth resistor R427, a gate of the fifth MOS tube Q25 is electrically connected with the third switch control unit and a second end of the fourth resistor R427, and a drain of the fifth MOS tube Q25 is electrically connected with the output unit.

[0071] Specifically, as shown in Figure 2 The third switch control unit includes a fourth capacitor C688, a fifth capacitor C621, a sixth MOS tube Q31, a first voltage stabilizing tube D13 and a fifth resistor R434; a first end of the fourth capacitor C688 is electrically connected with the first switch unit and the second switch unit, a second end of the fourth capacitor C688 is electrically connected with a first end of the first voltage stabilizing tube D13, a first end of the fifth capacitor C621, a first end of the fifth resistor R434 and a gate of the sixth MOS tube Q31, a second end of the first voltage stabilizing tube D13 is electrically connected with the MCU 400, a second end of the fifth capacitor C621, a second end of the fifth resistor R434 and a source of the sixth MOS tube Q31 are grounded, and a drain of the sixth MOS tube Q31 is electrically connected with a gate of the fifth MOS tube Q25.

[0072] Specifically, as shown in Figure 2 The output unit includes a sixth capacitor C615, a seventh capacitor C705 and an eighth capacitor C706; first ends of the sixth capacitor C615, the seventh capacitor C705 and the eighth capacitor C706 are respectively electrically connected with a drain of the fifth MOS tube Q25 and the MCU 400; and second ends of the sixth capacitor C615, the seventh capacitor C705 and the eighth capacitor C706 are grounded.

[0073] The self-locking principle of the embodiment of the application is as follows:

[0074] The energy storage unit C688 is a charging capacitor, which plays a role of charging when the battery is powered on, provides a control electrode (gate) voltage for Q31 at the moment of power-on, makes Q31 conductive, and makes the control electrode of Q25 low, because Q25 is a PMOS tube, low level is conductive, after conduction, the output RC time constant path time is reached, the purpose of conduction is achieved, then the MCU gets the supply voltage, and the MCU is started. After the MCU is initialized, a high level is output from the MCU_SYS_SHUTDOWN network pin, Q31 is maintained to be conductive, and Q25 is maintained to be conductive again. Therefore, the boot maintenance is realized, and the power supply is kept powered on.

[0075] When the MUC detects that the power supply is low, at this time, the MCU_SYS_SHUTDOWN network outputs a low level, thereby turning off the whole machine power supply, playing a role of power-off protection, thereby being beneficial to reducing the energy consumption of the battery in the low power state.

[0076] Application scenario description:

[0077] When the user uses to the low battery power, detects the low power, long time without use, the MCU outputs low level, controls Q31, pulls down the drain electrode of Q31, turns off Q25, the whole power supply system, handles the open circuit state, in this state, the battery discharge circuit is minimum, the whole machine power consumption is minimum, at this time, the only thing that will affect the battery consumption power is only the battery protection board and the self-consumption power inside the battery core, reaches the purpose of waiting for the extension standby, effectively saves the power, reduces the unnecessary power waste.

[0078] The low-power intelligent door lock is implemented, the self-locking module and the MCU are arranged, when the MCU detects the low power, long time without use, the MCU outputs low level, closes the whole power supply system, reduces the battery discharge circuit, reduces the whole machine power consumption, reaches the purpose of waiting for the extension standby, effectively saves the power, reduces the unnecessary power waste.

[0079] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A low-power smart door lock, characterized in that, include: MCU; First power supply module; Second power supply module; Self-locking module; The first power supply module and the second power supply module are electrically connected to the self-locking module and the MCU, respectively, and are used to supply power to the circuit load through the self-locking module; The self-locking module is electrically connected to the MCU and is used to self-lock according to the MCU control command when the power is low, thereby stopping the power supply to the circuit load.

2. The low-power smart door lock according to claim 1, characterized in that, The first power supply module includes: First switch unit and first switch control unit; The first switching unit is electrically connected to the dry cell battery and the self-locking module respectively, and is used to control the switch powered by the dry cell battery; The first switch control unit is electrically connected to the first switch unit and the MCU respectively, and is used to pull the level low and turn off the dry battery power supply according to the control signal.

3. The low-power smart door lock according to claim 1, characterized in that, The second power supply module includes: Second switch unit and second switch control unit; The second switching unit is electrically connected to the lithium battery and the self-locking module respectively, and is used to control the switch for lithium battery power supply; The second switch control unit is electrically connected to the second switch unit and the MCU respectively, and is used to pull the level low and turn off the lithium battery power supply according to the control signal.

4. The low-power smart door lock according to claim 1, characterized in that, The self-locking module includes: Third switching unit; Third switch control unit; Output unit; The third switching unit is electrically connected to the first switching unit, the second switching unit and the output unit respectively. The output unit is also electrically connected to the MCU and is used to supply power to the MCU. The third switch control unit is electrically connected to the first switch unit, the second switch unit and the MCU respectively, and is used to keep the third switch unit on when the power supply is normal and to keep the third switch unit off when the power supply is low, according to the control signal.

5. The low-power smart door lock according to claim 2, characterized in that, The first switching unit includes: First MOSFET, second MOSFET, and first resistor; The drain of the first MOSFET is electrically connected to the dry cell battery. The gate of the first MOSFET, together with the first end of the first resistor and the gate of the second MOSFET, is electrically connected to the first switch control unit. The source of the first MOSFET, the second end of the first resistor, and the source of the second MOSFET are electrically connected. The drain of the second MOSFET is electrically connected to the self-locking module.

6. The low-power smart door lock according to claim 5, characterized in that, The first switch control unit includes: The third MOSFET, the first capacitor, and the second resistor; The drain of the third MOS transistor is electrically connected to the gate of the first MOS transistor, the first end of the first resistor, and the gate of the second MOS transistor. The source of the third MOS transistor is grounded. The gate of the third MOS transistor is electrically connected to the first end of the first capacitor and the first end of the second resistor. The second end of the first capacitor and the second end of the second resistor are connected together and then grounded.

7. The low-power smart door lock according to claim 3, characterized in that, The second switching unit includes: The fourth MOSFET, the second capacitor, the third capacitor, and the third resistor; The first terminal of the second capacitor and the first terminal of the third capacitor are electrically connected to the drain of the fourth MOS transistor. The second terminal of the second capacitor and the second terminal of the third capacitor are grounded. The fourth MOS transistor is electrically connected to the first terminal of the third resistor and the self-locking module. The gate of the fourth MOS transistor is electrically connected to the second terminal of the third resistor and the second switch control unit.

8. The low-power smart door lock according to claim 4, characterized in that, The third switching unit includes: The fifth MOSFET and the fourth resistor; The source of the fifth MOS transistor is electrically connected to the first switching unit, the second switching unit, and the first terminal of the fourth resistor; the gate of the fifth MOS transistor is electrically connected to the third switching control unit and the second terminal of the fourth resistor; and the drain of the fifth MOS transistor is electrically connected to the output unit.

9. The low-power smart door lock according to claim 8, characterized in that, The third switch control unit includes: The fourth capacitor, the fifth capacitor, the sixth MOSFET, the first Zener diode, and the fifth resistor; The first terminal of the fourth capacitor is electrically connected to the first switching unit and the second switching unit. The second terminal of the fourth capacitor is electrically connected to the first terminal of the first Zener diode, the first terminal of the fifth capacitor, the first terminal of the fifth resistor, and the gate of the sixth MOS transistor. The second terminal of the first Zener diode is electrically connected to the MCU. The second terminal of the fifth capacitor, the second terminal of the fifth resistor, and the source of the sixth MOS transistor are grounded. The drain of the sixth MOS transistor is electrically connected to the gate of the fifth MOS transistor.

10. The low-power smart door lock according to claim 8, characterized in that, The output unit includes: Sixth capacitor, seventh capacitor, eighth capacitor; The first terminals of the sixth, seventh, and eighth capacitors are electrically connected to the drain of the fifth MOS transistor and the MCU, respectively. The second terminals of the sixth, seventh, and eighth capacitors are grounded.

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