Power supply circuit and intelligent lock

Abstract

The utility model provides a power supply circuit and an intelligent lock. The power supply circuit comprises a power supply protection module, a boost module and a control module. The input end and the output end of the power supply protection module are correspondingly connected with the power supply and the power utilization unit respectively and are used for transmitting electric signals output by the power supply to the power utilization unit; a power input end and a power output end of the boosting module are correspondingly connected to a power supply and a power utilization unit respectively and are used for boosting an electric signal output by the power supply and transmitting the boosted electric signal to the power utilization unit; the control end of the boosting module is connected to the control module and is used for boosting under the control of the control module; the power output end of the boosting module is connected to the output end of the power protection module, and the power protection module stops transmitting the electric signals to the power utilization unit based on the boosted electric signals. According to the utility model, when the power supply voltage is low, the voltage output to the electric unit can be increased, and the normal operation of the electric unit can be driven with low power consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply circuits, and particularly to a power supply circuit and an intelligent lock. Background Art

[0002] A power supply circuit is a circuit module connected between a power supply module and a power-consuming unit. Specifically, the power supply module can provide a working power supply for the power-consuming unit through the power supply circuit. However, in existing power supply circuits, only the power module is connected to the power-consuming unit to supply power to the power-consuming unit through the power module. Once the voltage of the power module is low, the voltage of the working power supply provided for the power-consuming unit is insufficient, which will affect the normal operation of the power-consuming unit at this time. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a power supply circuit and an intelligent lock, which can boost the voltage output to the power-consuming unit when the voltage of the power module is low and when the user needs it, and realize the normal operation of driving the power-consuming unit with low power consumption.

[0004] The first embodiment of the utility model provides a power supply circuit, including: a power protection module, a boost module, and a control module;

[0005] The input end and the output end of the power protection module are respectively connected to the power supply and the power-consuming unit, and are used for transmitting the electrical signal output by the power supply to the power-consuming unit;

[0006] The power input end and the output end of the boost module are respectively connected to the power supply and the power-consuming unit, and are used for boosting the electrical signal output by the power supply and then transmitting it to the power-consuming unit;

[0007] The control end of the boost module is connected to the control module and is used for performing boost work under the control of the control module;

[0008] The power output end of the boost module is connected to the output end of the power protection module, and based on the boosted electrical signal, the power protection module stops transmitting the electrical signal to the power-consuming unit.

[0009] The second embodiment of the present application provides an intelligent lock, the power supply circuit as described above and a power-consuming module; the power supply circuit is used for providing electric energy for the power-consuming module.

[0010] Compared with the prior art, when the power supply voltage is greater than or equal to a preset threshold, the present utility model outputs the power supply voltage to the power-consuming unit through the power supply protection module. When the power supply voltage is less than the preset threshold, under the control of the control module, the boost module boosts the power supply voltage and then outputs the boosted voltage to the power-consuming unit. That is, when the power supply voltage is small and the control module controls the boost module to work, the boost module will start to boost the voltage and output it to the power-consuming unit, enabling the power-consuming unit to operate normally. It can drive the normal operation of the power-consuming unit with low power consumption and reduce the waste of electric energy.

[0011] In order to understand the present utility model more clearly, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. Brief Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the modules of a power supply circuit according to an embodiment of the present utility model.

[0013] Figure 2 It is a circuit diagram of a power supply circuit according to an embodiment of the present utility model.

[0014] Figure 3 It is a schematic diagram of the modules of an intelligent lock according to an embodiment of the present utility model.

[0015] 100. Power supply circuit; 103. Power supply protection module; 105. Boost module; 107. Control module; 10. Intelligent lock; 200. Power-consuming module. Specific Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1-2 , Figure 1 which is a schematic diagram of the modules of a power supply circuit 100 according to an embodiment of the present utility model, Figure 2 and which is a circuit diagram of a power supply circuit 100 according to an embodiment of the present utility model. The power supply circuit 100 includes: a power supply protection module 103, a boost module 105, and a control module 107; the input terminal and the output terminal of the power supply protection module 103 are respectively connected to the power supply and the power-consuming unit, and are used to transmit the electrical signal output by the power supply to the power-consuming unit.

[0018] The power input terminal and the output terminal of the boost module 105 are respectively connected to the power supply and the power-consuming unit, and are used to boost the electrical signal output by the power supply and then transmit it to the power-consuming unit.

[0019] The control terminal of the boost module 105 is connected to the control module 107 and is used to perform boost operation under the control of the control module 107.

[0020] The power output terminal of the boost module 105 is connected to the output terminal of the power protection module 103, and based on the boosted electrical signal, the power protection module 103 stops transmitting the electrical signal to the power-consuming unit.

[0021] The control module 107 is used to output a control signal to the boost module 105. When the power supply voltage is less than the preset threshold, the boost module 105 boosts the power supply voltage to output a boosted voltage to the power-consuming unit. Optionally, Figure 2 the power supply is represented by +7V4_Battery, and the power-consuming unit is represented by MOTOR_+7.4V.

[0022] As Figure 2 shown, the power supply circuit 100 further includes an inductor L2. The input terminal of the power protection module 103 is connected to the power supply via the inductor L2. The inductor L2 can be used for charging and discharging to delay the influence of the change of the power supply voltage on the power-consuming unit.

[0023] Among them, the control module can be any structure that can be triggered by the user, including a key structure, a lock body handle rotation structure, etc.

[0024] The working principle of this embodiment is as follows:

[0025] When the power supply voltage is greater than or equal to the preset threshold, the power supply voltage is output to the power-consuming unit through the power protection module 103. When the power supply voltage is less than the preset threshold, under the control of the control module 107, the boost module 105 boosts the power supply voltage and then outputs the boosted voltage to the power-consuming unit.

[0026] Compared with the prior art, in the present invention, when the power supply voltage is greater than or equal to the preset threshold, the power supply voltage is output to the power-consuming unit through the power protection module 103. When the power supply voltage is less than the preset threshold, under the control of the control module 107, the boost module 105 boosts the power supply voltage and then outputs the boosted voltage to the power-consuming unit. That is, in the present invention, when the power supply voltage is small and the control module 107 controls the boost module 105 to work, the boost module 105 will start to boost and output to the power-consuming unit so that the power-consuming unit can operate normally. It can drive the normal operation of the power-consuming unit with low power consumption and reduce the waste of electric energy.

[0027] Please refer to Figure 2, in a feasible embodiment, the boost module 105 may include a boost chip U6 and a first resistor R20; wherein, the boost chip U6 includes a chip input terminal, a chip output terminal, and a chip enable terminal; the first resistor R20 includes a first end and a second end.

[0028] The chip input terminal of the boost chip U6 is the power input terminal of the boost module 105, and the chip enable terminal of the boost chip U6 is the control terminal of the boost module 105; the chip output terminal of the boost chip U6 is connected to the first end of the first resistor R20 to serve as the control terminal of the boost module 105.

[0029] Optionally, the boost chip U6 may adopt a chip of model KF9104. When the boost chip U6 can adopt a chip of model KF9104, the pin VDD of KF9104 is the chip input terminal, the pin CE of KF9104 is the chip enable terminal, the pin FB of KF9104 is the chip output terminal, and the pin GND of KF9104 is grounded.

[0030] Among them, the boost module 105 may further include a switch chip U5, and the switch chip U5 may adopt a chip of model KF4812. When the switch chip U5 adopts a chip of model KF4812, the pin EXT of KF9104 is connected to the pins G1 and G2 of KF4812, the pins S1 and S2 of KF9104 are grounded, and the pins D1 and D2 of KF9104 are both connected to the power supply through an inductor L2.

[0031] In this embodiment, the boost effect can be achieved through the boost chip U6 to drive the normal operation of the power-consuming unit with the boosted boost voltage.

[0032] In a feasible embodiment, the boost module 105 further includes a second resistor R33 and a switch component Q7; the switch component Q7 includes a switch input terminal, a switch output terminal, and a switch drive terminal. Optionally, the boost module 105 may adopt an Nmos transistor.

[0033] The first end of the second resistor R33 is connected to the output terminal of the power supply protection module via the first resistor R20, and the second end of the second resistor R33 is connected to the switch input terminal of the switch component Q7; the switch output terminal of the switch component Q7 is grounded, and the switch drive terminal of the switch component Q7 is connected to the chip enable terminal of the boost chip U6.

[0034] Among them, when the control module 107 does not send a boost control signal to the boost module 105, the switch driving end of the switch component Q7 is at a low-level signal, and the switch component Q7 is turned on. The current output by the power supply passes through the inductor L2 and the protection module, and is respectively output to the power-consuming unit, and flows to the ground via the first resistor R20, the second resistor R33, and the switch component Q7, preventing the current output by the power module from flowing through the first resistor R20 and then to the control end of the boost chip U6. When the control module 107 sends a boost control signal to the boost module 105, the switch driving end of the switch component Q7 is at a high-level signal, and the switch component Q7 is turned off, so that the boost voltage output by the control end of the boost chip U6 only acts on the power-consuming unit via the first resistor R20. And at this time, due to the action of the power protection module 103, even if the boost voltage output by the control end of the boost chip U6 is higher than the voltage output by the power supply output end of the power supply, there will be no current flowing back to the power supply, which can protect the safety of the power supply.

[0035] In this embodiment, when the boost chip U6 is not working, it is possible to prevent the current output by the power supply from flowing into the boost chip U6, so as not to affect the boost chip U6. When the boost chip U6 is working, the boost voltage output by the control end of the boost chip U6 can only act on the power-consuming unit via the first resistor R20, enabling the boost chip U6 to work stably.

[0036] In a feasible embodiment, the boost module 105 further includes a current-limiting resistor R43, and the boost signal output end of the control module 107 is connected to the control end of the boost module 105 via the current-limiting resistor R43. Optionally, Figure 2 , the boost signal output end of the control module 107 is represented by MOTOR_CE.

[0037] In this embodiment, the current-limiting resistor R43 can be used to limit the current of the electrical signal received by the control end of the boost module 105 to protect the boost module 105.

[0038] In a feasible embodiment, the boost module 105 further includes a shunt resistor R44, and the chip enable end of the boost chip U6 is grounded via the shunt resistor R44.

[0039] In this embodiment, the shunt resistor R44 can be used to shunt the electrical signal received by the chip enable end of the boost chip U6 to protect the boost chip U6.

[0040] In a feasible embodiment, the boost module 105 further includes a first capacitor C13, and the chip input end of the boost chip U6 is grounded via the first capacitor C13.

[0041] In this embodiment, through the first capacitor C13, the power supply received at the chip input terminal of the boost chip U6 can be filtered, so that the chip input terminal of the boost chip U6 can receive a stable power supply. Herein, the power supply refers to the power signal output from the power supply to the chip input terminal of the boost chip U6.

[0042] In a feasible embodiment, the power supply protection module 103 includes a diode D5; the anode of the diode D5 serves as the input terminal of the power supply protection module 103, and the cathode of the diode D5 serves as the output terminal 103 of the power supply protection module.

[0043] In this embodiment, by restricting the current flow direction through the diode D5, it is possible to prevent the situation where when the boost voltage output by the boost module 105 is higher than the power supply voltage, the current flows reversely to the power supply and damages the power supply, thereby protecting the safety of the power supply.

[0044] In a feasible embodiment, the power supply circuit 100 further includes a second capacitor EC4; the power supply is grounded via the second capacitor EC4.

[0045] Wherein, the capacitance of the second capacitor EC4 is greater than the capacitance of the first capacitor C13.

[0046] In this embodiment, through the second capacitor EC4, the power supply voltage can be filtered and / or energy stored.

[0047] In a feasible embodiment, the power supply circuit 100 further includes a bidirectional diode ESD5, and the power supply is grounded via the bidirectional diode ESD5.

[0048] In this embodiment, through the bidirectional diode ESD5, the power supply can be protected against overvoltage.

[0049] Please refer to Figure 3 , the second embodiment of the present application provides an intelligent lock 10, including: the power supply circuit 100 as described above and an electrical module 200; the power supply circuit 100 is used to supply electrical energy to the electrical module 200.

[0050] It should be noted that the intelligent lock 10 provided in the second embodiment of the present application and the power supply circuit 100 provided in the first embodiment of the present application belong to the same concept. The implementation process thereof is detailed in the method embodiment and will not be elaborated here.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power supply circuit, characterized in that: include: Power protection module, boost module and control module; The input end and the output end of the power protection module are respectively connected to the power supply and the power consumption unit, and are used to transmit the electrical signal output by the power supply to the power consumption unit; The power input terminal and the output terminal of the boost module are respectively connected to the power supply and the power consumption unit, and are used to boost the electrical signal output by the power supply and transmit it to the power consumption unit; The control end of the boost module is connected to the control module, and is used to perform boost work under the control of the control module; The power output end of the boost module is connected to the output end of the power protection module, and based on the boosted electrical signal, the power protection module stops transmitting the electrical signal to the power-consuming unit.

2. The power supply circuit according to claim 1, characterized in that: The boost module includes a boost chip and a first resistor; wherein the boost chip includes a chip input terminal, a chip output terminal and a chip enable terminal; the first resistor includes a first terminal and a second terminal; The chip input end of the boost chip is the power input end of the boost module, and the chip enable end of the boost chip is the control end of the boost module; the chip output end of the boost chip is connected to the first resistor to serve as the output end of the boost module.

3. The power supply circuit according to claim 2, characterized in that: The boost module further includes a second resistor and a switch component; the switch component includes a switch input terminal, a switch output terminal and a switch driving terminal; The first end of the second resistor is connected to the output end of the power protection module via the first resistor, and the second end of the second resistor is connected to the switch input end of the switch component; The switch output terminal of the switch component is grounded, and the switch driving terminal of the switch component is connected to the chip enable terminal of the boost chip.

4. The power supply circuit according to claim 2, characterized in that: The boost module further includes a current limiting resistor, and the control module is connected to the chip enable terminal of the boost chip via the current limiting resistor.

5. The power supply circuit according to claim 2, characterized in that: The boost module further includes a shunt resistor, and a chip enable terminal of the boost chip is grounded via the shunt resistor.

6. The power supply circuit according to claim 2, characterized in that: The boost module further includes a first capacitor, and a chip input terminal of the boost chip is grounded via the first capacitor.

7. The power supply circuit according to any one of claims 1 to 6, characterized in that: The power supply circuit further includes an inductor, and the input end of the power protection module is connected to the power supply via the inductor.

8. The power supply circuit according to any one of claims 1 to 6, characterized in that: The power protection module includes a diode; the anode of the diode serves as the input end of the power protection module, and the cathode of the diode serves as the output end of the power protection module.

9. The power supply circuit according to any one of claims 1 to 6, characterized in that: The power supply circuit also includes a second capacitor; the power supply is grounded via the second capacitor.

10. A smart lock, characterized in that: include: The power supply circuit and power module according to any one of claims 1 to 9; The power supply circuit is used to provide electrical energy to the power consumption module.

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