Intelligent lock and double-battery power supply circuit thereof

Abstract

The utility model discloses an intelligent lock and a double-battery power supply circuit thereof, the double-battery power supply circuit comprises a first switch module, a second switch module, a third switch module and a fourth switch module, or when the output voltage of the first power supply end is higher than the threshold voltage and the output voltage of the second power supply end is greater than 0, the first battery supplies power to the control mechanism through the first power supply end; when the output voltage of the first power supply end is 0 and the output voltage of the second power supply end is greater than 0, or the output voltage of the first power supply end and the output voltage of the second power supply end are both greater than 0 and the output voltage of the first power supply end is equal to or lower than a threshold voltage; the second battery supplies power to the control mechanism through the second power supply end; according to the technical scheme, a double-battery power supply mode is adopted, it is ensured that the intelligent lock can be automatically switched to the second battery for power supply when the electric quantity of the first battery is insufficient, and therefore continuous operation of the intelligent lock is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to intelligent door lock technical field especially relates to a kind of intelligent lock and its double battery power supply circuit. BACKGROUND

[0002] With the progress of science and technology, intelligent lock gradually replaces traditional mechanical door lock, and becomes the common equipment of modern family and office. The traditional mechanical door lock is usually opened manually by key, while the intelligent lock is connected wirelessly with intelligent device (such as mobile phone, tablet computer, etc.), to realize remote control of opening and closing, and improve the convenience and security of users. The working principle of intelligent lock usually includes built-in battery, sensor, wireless communication module, etc., to realize automatic control and remote monitoring. At present, most of the intelligent locks are built-in with a battery to provide power for its work. The continuous work of the battery is crucial for the normal operation of the intelligent lock, especially in places without power socket. In order to maintain the normal function of the intelligent lock, the user needs to charge the battery regularly. When the battery power is low, the user usually needs to connect to the intelligent lock through the charging line to charge the battery. However, when the battery power is depleted, the user cannot use the intelligent lock to open or close, which brings inconvenience to the user. SUMMARY

[0003] The embodiment of the utility model provides an intelligent lock to solve the above technical problem.

[0004] The first aspect of the embodiment of the utility model provides a double battery power supply circuit of intelligent lock, which comprises:

[0005] The first switch module is connected to the first power supply end at the control end, the input end is connected to the second power supply end, and the output end is connected to the control mechanism of the intelligent lock;

[0006] Among them, the first power supply end is used for connecting the first battery, the first power supply end is connected to the control mechanism, and the second power supply end is used for connecting the second battery;

[0007] In the case that the output voltage of the first power supply end is greater than 0 and the output voltage of the second power supply end is 0, or the output voltage of the first power supply end is higher than the threshold voltage and the output voltage of the second power supply end is greater than 0, the first switch module is in the off state, and the first battery supplies power to the control mechanism through the first power supply end;

[0008] In the case that the output voltage of the first power supply end is 0 and the output voltage of the second power supply end is greater than 0, or the output voltage of the first power supply end and the second power supply end is greater than 0 and the output voltage of the first power supply end is equal to or lower than the threshold voltage, the first switch module is in the on state, and the second battery supplies power to the control mechanism through the second power supply end.

[0009] Optionally, the dual-battery power supply circuit further comprises:

[0010] a main control chip, a first sampling end of which is connected to the first power supply end, and a second sampling end of which is connected to the second power supply end;

[0011] a second switch module, a first end of which is connected to the control end of the first switch module, a second end of which is grounded, and a third end of which is connected to the control end of the main control chip;

[0012] when the main control chip monitors that the output voltage of the first power supply end is equal to or lower than the threshold voltage and the output voltage of the second power supply end is greater than 0, the main control chip controls the second switch module to be turned on, so as to turn on the first switch module.

[0013] Optionally, the dual-battery power supply circuit further comprises:

[0014] a voltage dividing module, a first end of which is connected to the first power supply end, a second end of which is connected to the control end of the first switch module, and a third end of which is grounded, so as to output the output voltage of the first power supply end after voltage division to the first switch module.

[0015] Optionally, the voltage dividing module comprises a first resistor and a second resistor, a first end of the first resistor being the first end of the voltage dividing module, a second end of the first resistor and a first end of the second resistor being commonly connected as the second end of the voltage dividing module, and a second end of the second resistor being the third end of the voltage dividing module.

[0016] Optionally, the dual-battery power supply circuit further comprises:

[0017] a backflow prevention module, which is connected between the first power supply end and the control mechanism, so as to realize one-way conduction between the first power supply end and the control mechanism.

[0018] Optionally, the backflow prevention module comprises a MOS tube, a drain of which is connected to the first power supply end, a source of which is connected to the control mechanism, and a base of which is connected to the control end of the main control chip.

[0019] when the main control chip monitors that the output voltage of the first power supply end is equal to or lower than the threshold voltage and the output voltage of the second power supply end is greater than 0, the main control chip controls the MOS tube to be turned off, so as to disconnect the connection between the first power supply end and the control mechanism.

[0020] Optionally, the dual-battery power supply circuit further comprises:

[0021] a first power supply management module, an input end of which is connected to the first power supply end, and an output end of which is connected to the control mechanism, so as to monitor and adjust the power supply process of the control mechanism by the first battery.

[0022] Optionally, the dual-battery power supply circuit further comprises:

[0023] A second power supply management module, the input end is connected with the second power supply end, and the output end is connected with the input end of the first switch module, so that the second battery is monitored and adjusted for the power supply process of the control mechanism.

[0024] Optionally, the capacity of the first battery is greater than the capacity of the second battery.

[0025] Optionally, the first battery is a lithium battery, and the second battery is a dry battery.

[0026] The utility model discloses a second aspect provides a kind of intelligent lock, including the double battery power supply circuit of the first aspect provided, first battery, second battery and control mechanism.

[0027] The technical effects of the utility model embodiment are as follows: by adopting the double battery power supply mode, the problem that the existing intelligent lock cannot be normally used when the battery power is depleted is solved. Firstly, by adopting the intelligent switching of the first switch module, the intelligent lock can be automatically switched to the second battery power supply when the first battery power is insufficient, so that the continuous operation of the intelligent lock is realized. Secondly, by designing the threshold voltage on the circuit to control the switching of the battery power supply, the intelligent lock can intelligently switch the power supply according to the battery state, avoiding the situation that the lock cannot be opened or closed due to the depletion of the battery power. The technical scheme not only improves the use convenience and reliability of the intelligent lock, but also effectively prolongs the service life of the intelligent lock and reduces the safety hazards caused by single battery failure. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the utility model embodiment, the drawings needed in the description of the utility model embodiment will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0029] Figure 1 is the first kind of structure schematic view of the double battery power supply circuit of the intelligent lock provided by the utility model embodiment one;

[0030] Figure 2 is the second kind of structure schematic view of the double battery power supply circuit of the intelligent lock provided by the utility model embodiment one;

[0031] Figure 3 is the third kind of structure schematic view of the double battery power supply circuit of the intelligent lock provided by the utility model embodiment one;

[0032] Figure 4 is the structure schematic view of the voltage dividing module in the double battery power supply circuit of the intelligent lock provided by the utility model embodiment one.

[0033] Figure 5 is a fourth structural schematic view of a double-battery power supply circuit of a smart lock provided by the embodiment one of the present application;

[0034] Figure 6 is a fifth structural schematic view of a double-battery power supply circuit of a smart lock provided by the embodiment one of the present application;

[0035] Figure 7 is a sixth structural schematic view of a double-battery power supply circuit of a smart lock provided by the embodiment one of the present application;

[0036] Figure 8 is a seventh structural schematic view of a double-battery power supply circuit of a smart lock provided by the embodiment one of the present application;

[0037] Figure 9 is a circuit diagram of a double-battery power supply circuit of a smart lock provided by the embodiment of the present application;

[0038] Figure 10 is a circuit diagram of a second power supply management module in a double-battery power supply circuit of a smart lock provided by the embodiment of the present application;

[0039] In the figure: 10, first battery; 20, second battery; 30, first switch module; 40, control mechanism; 50, main control chip; 60, second switch module; 70, voltage division module; 80, anti-backflow module; 90, first power supply management module; 100, second power supply management module; 101, first resistor; 102, second resistor. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] It should be understood that the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments presented herein. On the contrary, the embodiments are presented to make the disclosure complete and complete and to fully convey the scope of the present application to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity throughout the same reference numerals represent the same elements.

[0042] It should be understood that when an element or layer is referred to as being "on", "adjacent", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer, or one or more intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected to", or "directly coupled to" another element or layer, then there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are simply used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] For a thorough understanding of the present application, reference will be made to the following detailed description, in conjunction with the accompanying drawings, in which:

[0045] The embodiment provides a double-battery power supply circuit of an intelligent lock, as shown in the figure, comprising: Figure 1

[0046] The first switch module 30 is connected with the first power supply end A at the control end, connected with the second power supply end B at the input end, and connected with the control mechanism 40 of the intelligent lock at the output end.

[0047] The first power supply end A is used for connecting the first battery 10, and the first power supply end A is connected with the control mechanism 40. The second power supply end B is used for connecting the second battery 20.

[0048] ​In the case that the output voltage of the first power supply end A is greater than 0 and the output voltage of the second power supply end B is 0, or the output voltage of the first power supply end A is higher than the threshold voltage and the output voltage of the second power supply end B is greater than 0, the first switch module 30 is in the off state, and the first battery 10 supplies power to the control mechanism 40 through the first power supply end A.

[0049] In the case that the output voltage of the first power supply end A is 0 and the output voltage of the second power supply end B is greater than 0, or the output voltage of the first power supply end A and the second power supply end B are both greater than 0 and the output voltage of the first power supply end A is equal to or lower than the threshold voltage, the first switch module 30 is in the on state, and the second battery 20 supplies power to the control mechanism 40 through the second power supply end B.

[0050] Among them, the first power supply end A is connected to the first battery 10, when the voltage of the first battery 10 meets certain conditions (higher than 0 and greater than the threshold voltage), the first battery 10 supplies power to the control mechanism 40 through the first power supply end A, ensuring the normal operation of the control mechanism 40. The second power supply end B is connected to the second battery 20, as a backup power supply, through the on of the first switch module 30 to provide power for the control mechanism 40 of the smart lock. When the first battery 10 is insufficient (the voltage of the first battery 10 is 0 or lower than the threshold voltage), the first switch module 30 will automatically turn on, and the second battery 20 supplies power to the control mechanism 40 through the second power supply end B, ensuring the continuous operation of the equipment.

[0051] The control mechanism 40 is the power consumption mechanism that controls the operation of the smart lock, such as the actuator of the driving motor. In the case of power supply by the first battery 10 or the second battery 20, the control mechanism 40 performs the unlocking or locking operation of the smart lock, ensuring that the smart lock can respond normally when needed.

[0052] The first switch module 30 switches the power supply source of the smart lock according to the output voltage of the first battery 10, and selects the first battery 10 or the second battery 20 to supply power to the control mechanism 40 (such as a driving motor) of the smart lock. The threshold voltage is used to turn on or turn off the first switch module 30 under the condition of meeting the condition, and the threshold voltage is a specific voltage value set on the circuit according to the voltage that the first switch module 30 can be turned on, which is used to judge the high and low of the battery capacity. When the voltage of the first battery 10 is lower than the threshold voltage, the first switch module 30 will switch to the on state, and switch to the second battery 20 for power supply; when the voltage of the first battery 10 is high enough, the first switch module 30 is in the off state, and continues to be powered by the first battery 10. Specifically, when the output voltage of the first power supply end A is greater than 0 and the output voltage of the second power supply end B is 0 (for example, the second battery is not installed), or when the output voltage of the first power supply end A is higher than the set threshold voltage and the output voltage of the second power supply end B is greater than 0, the first switch module 30 is in the off state, the control circuit is powered by the first battery 10, and the control mechanism 40 of the smart lock works normally. When the output voltage of the first power supply end A is 0 (for example, the first battery is not installed) and the output voltage of the second power supply end B is greater than 0, or when the output voltages of the first power supply end A and the second power supply end B are both greater than 0 and the voltage of the first power supply end A is lower than the threshold voltage, the first switch module 30 is turned on, and the second battery 20 starts to supply power to the control mechanism 40 of the smart lock.

[0053] The technical effect of the first embodiment is that by adopting the dual-battery power supply mode, the problem that the existing smart lock cannot be normally used when the battery capacity is depleted is solved. First, by adopting the intelligent switching of the first switch module, it is ensured that the smart lock can automatically switch to the second battery power supply when the first battery capacity is insufficient, thereby realizing the continuous operation of the smart lock. Second, by designing the threshold voltage on the circuit to control the switching of the battery power supply, the smart lock can intelligently switch the power supply according to the battery state, thereby avoiding the situation that the lock cannot be opened or closed due to the depletion of the battery capacity. The technical solution not only improves the use convenience and reliability of the smart lock, but also effectively prolongs the service life of the smart lock and reduces the safety hidden danger caused by the failure of a single battery.

[0054] As an implementation manner, as shown in Figure 2 The dual-battery power supply circuit further comprises:

[0055] The first sampling end of the main control chip 50 is connected to the first power supply end A, and the second sampling end is connected to the second power supply end B.

[0056] The first end of the second switch module 60 is connected to the control end of the first switch module 30, the second end is grounded, and the third end is connected to the control end of the main control chip 50.

[0057] When the main control chip 50 detects that the output voltage of the first power supply end A is equal to or lower than the threshold voltage, and the output voltage of the second power supply end B is greater than 0, the main control chip 50 controls the second switch module 60 to be turned on, so that the first switch module 30 is turned on.

[0058] The main control chip 50 monitors the voltage states of the first power supply end A and the second power supply end B, and controls the working states of other modules according to the voltage conditions, so as to ensure that the smart lock can switch to battery power supply in a low voltage state. The main control chip 50 monitors the output voltage of the first power supply end A through the first sampling end, and monitors the output voltage of the second power supply end B through the second sampling end. When it is detected that the output voltage of the first power supply end A is lower than or equal to the threshold voltage and the output voltage of the second power supply end B is greater than 0, the main control chip 50 controls the level signal output by the control end to control the second switch module 60 to be turned on, so as to switch the power supply source.

[0059] The threshold voltage is a standard for judging whether the first battery 10 has enough power, which is set in the main control chip 50 by software according to historical values or experience.

[0060] The second switch module 60 is turned on or off according to the control signal of the main control chip 50, thereby affecting the working state of the first switch module 30 and switching the power supply. When the second switch module 60 is turned on, the control end of the first switch module 30 is connected with the control end of the main control chip 50, so that the level signal output by the control end of the main control chip 50 can turn on the first switch module 30, switch to the second battery 20 power supply, and ensure that the smart lock continues to work. The first switch module 30 determines whether to supply power to the control mechanism 40 of the smart lock by the first battery 10 or the second battery 20 according to the level signal of the main control chip 50. When the second switch module 60 is turned on, the first switch module 30 enters the turned-on state, allowing the second battery 20 to supply power to the smart lock through the second power supply end B. If the voltage of the first power supply end A is high enough, the first switch module 30 remains in the turned-off state, and the first battery 10 continues to supply power.

[0061] The technical effect of the embodiment is that when the first battery 10 is insufficient, the second battery 20 can be switched to power supply through the monitoring of the main control chip 50, avoiding the situation that the lock cannot be opened due to battery depletion. The main control chip 50 monitors the battery voltage in real time and controls the second switch module 60, so as to ensure that the smart lock is always supported by sufficient power. By setting a suitable threshold voltage and monitoring by the main control chip 50, the battery state can be accurately judged, the battery use efficiency is optimized, and the service life of the smart lock is prolonged.

[0062] As an embodiment, as shown in Figure 3 The double-battery power supply circuit further comprises:

[0063] The first end 1 of the voltage dividing module 70 is connected to the first power supply end A, the second end 2 is connected to the control end of the first switch module 30, and the third end 3 is grounded, so as to output the output voltage of the first power supply end A to the first switch module 30 after voltage division.

[0064] The main function of the voltage dividing module 70 is to divide the output voltage of the first power supply end A through resistance or capacitance division, and provide the divided voltage to the control end of the first switch module 30, so as to control the working state (turn on or turn off) of the first switch module 30. Through the design of the voltage dividing module 70, the turn-on and turn-off of the switch module can be accurately controlled under different voltage conditions, and the stable and reliable power management of the intelligent lock is ensured. The first end of the voltage dividing module 70 is connected to the first power supply end A and receives the voltage signal from the first battery 10. The voltage dividing module 70 is usually composed of two series resistors. The input voltage is divided into a lower output voltage through the two resistors. According to the proportional relationship of the resistors, the input voltage will be divided between the two resistors, and the divided voltage will be transmitted to the control end of the first switch module 30 to control whether it is turned on. When the voltage of the first power supply end A is high enough, the divided voltage is also high enough, and the control signal can keep the first switch module 30 in the off state. When the voltage of the first power supply end A is low, the voltage dividing module 70 will distribute a lower voltage to the control end of the first switch module 30, forcing the first switch module 30 to turn on, and then switching to the second battery 20 power supply.

[0065] For example, as shown in Figure 4 The voltage dividing module 70 includes a first resistor 101 and a second resistor 102. The first end of the first resistor 101 is the first end 1 of the voltage dividing module 70, the second end of the first resistor 101 and the first end of the second resistor 102 are connected together as the second end 2 of the voltage dividing module 70, and the second end of the second resistor 102 is the third end 3 of the voltage dividing module 70.

[0066] The technical effect of the embodiment is that by adjusting the value of the voltage dividing resistor, the turn-on or turn-off of the first switch module 30 can be accurately controlled, and the battery power supply can be accurately switched under different voltage conditions, so as to realize the stable control and operation of the intelligent lock.

[0067] As an embodiment, as shown in Figure 5 The double-battery power supply circuit further includes:

[0068] The anti-backflow module 80 is connected between the first power supply end A and the control mechanism 40, so as to realize one-way conduction between the first power supply end A and the control mechanism 40.

[0069] The main function of the anti-backflow module 80 is to prevent current from flowing back from the control mechanism 40 of the smart lock to the first power supply end A. When the control mechanism 40 is working, the current should normally flow from the first battery 10 to the control mechanism 40 through the first power supply end A. However, in some cases (for example, the battery is too low or other abnormal conditions), the current may flow in the opposite direction, which may cause damage to the battery or cause system failure. The anti-backflow module 80 is designed to ensure that the current can only flow in one direction, thereby effectively preventing the reverse flow of current. The anti-backflow module 80 is usually composed of a diode or other unidirectional conduction device (such as MOSFET, Schottky diode, etc.), which is connected between the first power supply end A and the control mechanism 40. If the anti-backflow module 80 is composed of a diode, the anode of the diode is connected to the first power supply end A, and the cathode is connected to the control mechanism 40. When the voltage of the first power supply end A is normal and provides current, the current flows to the control mechanism 40 through the anti-backflow module 80. At this time, due to the conduction characteristics of the diode, the current can flow normally, ensuring the normal operation of the control mechanism 40.

[0070] The technical effect of the present embodiment is that the anti-backflow module 80 is designed to flow in one direction, effectively preventing the current from flowing back from the control mechanism 40 of the smart lock to the first power supply end A, avoiding damage to the battery due to reverse current, thereby ensuring the safety of the battery and the control circuit.

[0071] As an embodiment, as shown in Figure 6 The anti-backflow module 80 includes a MOS tube, the drain of which is connected to the first power supply end A, the source of which is connected to the control mechanism 40, and the gate of which is connected to the control end of the master control chip 50.

[0072] When the master control chip 50 monitors that the output voltage of the first power supply end A is equal to or lower than the threshold voltage, and the output voltage of the second power supply end B is greater than 0, the master control chip 50 controls the MOS tube to be turned off, so as to disconnect the connection between the first power supply end A and the control mechanism 40.

[0073] The MOS tube functions to realize one-way current conduction between the first power supply end A and the control mechanism 40. Under normal working conditions, when the master control chip 50 detects that the voltage of the first power supply end A is higher than the threshold voltage, the master control chip 50 makes the MOS tube conduct through the control signal, thereby allowing current to flow from the first power supply end A to the control mechanism 40, ensuring the normal working of the smart lock. When the master control chip 50 monitors that the output voltage of the first power supply end A is equal to or lower than the threshold voltage, and the voltage of the second power supply end B is greater than 0, the master control chip 50 controls the MOS tube to be turned off, disconnecting the connection between the first power supply end A and the control mechanism 40. At this time, current cannot flow from the first power supply end A to the control mechanism 40, preventing the reverse flow of current when the first battery 10 has a low charge, thereby protecting the battery and ensuring the safety of the circuit.

[0074] The technical effect of the embodiment is that the MOS tube and the master control chip 50 jointly ensure the safe use of the battery, avoid over-discharge and reverse flow of current, thereby improving the stability and reliability of the smart lock.

[0075] As an embodiment, as shown in Figure 7 The double-battery power supply circuit further comprises:

[0076] The first power supply management module 90 has an input end connected to the first power supply end A and an output end connected to the control mechanism 40, so as to monitor and regulate the power supply process of the first battery 10 to the control mechanism 40.

[0077] The main function of the first power supply management module 90 is to monitor and regulate the power supply process of the first battery 10 to the control mechanism 40 through the first power supply end A, so as to ensure the stable operation of the smart lock and protect the first battery 10 from over-discharge or unstable voltage. The first power supply management module 90 continuously monitors the output voltage of the first power supply end A, and when the battery has sufficient charge, the output voltage remains within the set normal working range. When the voltage of the first power supply end A is maintained within the normal working range, the first power supply management module 90 allows current to flow from the first battery 10 to the control mechanism 40, driving the functions of the smart lock. When the voltage of the first battery 10 is detected to be too low, the first power supply management module 90 will take protective measures such as turning off the power supply or switching to the second battery 20 for power supply, which can effectively prevent the battery from being damaged due to over-discharge and improve the service life of the battery. The first power supply management module 90 also adjusts the current flow according to the power consumption demand of the control mechanism 40, so as to optimize the use efficiency of the battery and prolong the running time of the smart lock.

[0078] The technical effect of the embodiment is that by introducing the first power supply management module 90, accurate monitoring and adjustment of the first battery 10 are realized, effectively ensuring the stable operation of the intelligent lock system and the long-term use of the battery. The first power supply management module 90 can monitor the voltage state of the first battery 10 in real time, ensure normal power supply when the battery is fully charged, and avoid damaging the battery due to excessive discharge. When the battery is low, the power supply is automatically turned off to protect the battery from damage; by accurately adjusting the power supply flow, the use efficiency of the battery is optimized, and the working time of the intelligent lock is prolonged.

[0079] As an embodiment, as shown in Figure 8 The double-battery power supply circuit further comprises:

[0080] The second power supply management module 100 is connected to the second power supply end B at the input end and connected to the input end of the first switch module 30 at the output end to monitor and adjust the power supply process of the second battery 20 to the control mechanism 40.

[0081] The main function of the second power supply management module 100 is to monitor and adjust the power supply process of the second battery 20 to the control mechanism 40 through the second power supply end B, to ensure that the second battery 20 can provide stable power supply to the control mechanism 40 of the intelligent lock when the first battery 10 is insufficient, thereby ensuring the normal work of the intelligent lock. Specifically, the second power supply management module 100 will continuously monitor the voltage state of the second battery 20, and when the first switch module 30 is turned on, the second power supply management module 100 controls the current to flow from the second battery 20 to the control mechanism 40. At this time, the second power supply management module 100 controls the output of the second power supply end B to ensure sufficient current supply to meet the working requirements of the intelligent lock. In addition, the second power supply management module 100 can also work in cooperation with the first power supply management module 90 to ensure seamless switching of the two batteries in different working states, optimize the use efficiency of the battery, provide longer power guarantee, and ensure the stability and continuity of the intelligent lock.

[0082] The technical effect of the embodiment is that the second power supply management module 100 accurately monitors and adjusts the power supply process of the second battery 20 to ensure that the second battery 20 can provide power to the control mechanism 40 of the intelligent lock in time and stably when the first battery 10 is insufficient.

[0083] As an embodiment, the capacity of the first battery 10 is greater than that of the second battery 20.

[0084] The capacity refers to the battery capacity when the battery is full, which refers to the maximum power storage capacity of the battery, i.e. when the battery is fully charged, the power that can be provided. The capacity of the battery is usually expressed in milliampere-hours (mAh) or ampere-hours (Ah), indicating the time the battery can continue to discharge at a certain current. The first battery 10 can store more power than the second battery 20, and the second battery 20 has a smaller capacity and is usually used for backup or emergency use to provide additional power when the first battery 10 is depleted.

[0085] For example, the first battery 10 is a lithium battery, and the second battery 20 is a dry battery.

[0086] The first battery 10 is a lithium battery, which is known for its high energy density, and can store more power in the same volume compared to other types of batteries. Therefore, the first battery 10 usually has a larger capacity and can provide power support for a smart lock for a longer period of time, and its charging and discharging efficiency is higher. The second battery 20 is a dry battery, usually an alkaline battery or other type of disposable battery, which has a smaller capacity than a lithium battery. Although the single power is less, the dry battery can be used as a backup power source to provide emergency power supply when the lithium battery is low.

[0087] As shown in Figure 9 and Figure 10 , the following will be described in detail through a specific circuit structure:

[0088] The first power management module 90 includes filter capacitor C1, filter capacitor C2, filter capacitor C3, filter capacitor C4, filter capacitor C5, filter resistor R1, filter resistor R2, filter resistor R3, voltage stabilizing tube D1 and first power management chip U1. The first end of the filter capacitor C1, the first end of the filter capacitor C2, the first end of the filter resistor R1 and the pin VIN of the first power management chip U1 are commonly connected as the first power supply end V_LilBat, the second end of the filter capacitor C1 and the second end of the filter capacitor C2 are commonly connected to the ground, the second end of the filter resistor R1 is connected to the pin CE of the first power management chip U1 and the first end of the voltage stabilizing tube D1 respectively, the second end of the voltage stabilizing tube D1 is grounded, the pin LX of the first power management chip U1 is connected to the first end of the inductor L1, the second end of the inductor L1, the first end of the filter resistor R2, the first end of the filter capacitor C3, the first end of the filter capacitor C4 and the first end of the filter capacitor C5 are commonly connected as the output end of the first power management module 90, the second end of the filter resistor R2 is connected to the first end of the resistor R3, the pin FB of the first power management chip U1 and the second end of the filter capacitor C3 respectively, the second end of the filter resistor R3 is grounded, and the second end of the filter capacitor C4 and the second end of the filter capacitor C5 are commonly connected to the ground.

[0089] The pin VIN and the pin CE of the first power management chip U1 are connected with the first power supply end V_LilBat, so that the first power management chip U1 receives electric energy and is in a working state. The pin FB of the first power management chip U1 is used for receiving a feedback signal, so as to detect and adjust the output voltage output by the first power supply end V_LilBat.

[0090] The first switch module 30 is a MOS tube Q2, the second switch module 60 is a MOS tube Q3, the voltage division module 70 includes a voltage division resistor R5 and a voltage division resistor R6, the first power supply end V_LilBat is connected with the first end of the resistor R5, the second end of the resistor R5 is connected with the first end of the resistor R3, the first end of the resistor R6 and the source electrode of the MOS tube Q3 respectively, the second end of the resistor R6 is grounded, the second end of the resistor R3 is connected with the gate electrode G2 of the MOS tube Q2, the drain electrode D2 of the MOS tube Q2 is connected with the power supply end VDD_SYS of the control mechanism 40, the drain electrode of the MOS tube Q3 is grounded, the gate electrode of the MOS tube Q3 is connected with the first end of the resistor R7 and the first end of the resistor R8 respectively, the second end of the resistor R7 is grounded, and the second end of the resistor R8 is connected with the control end MCU_POWER_CTRL of the main control chip 50.

[0091] The second power supply management module includes a second power management chip U2, the pin VIN of the second power management chip U2 is connected with the second power supply end V_CR123A, and the pin VOUT of the second power management chip U2 is connected with the source electrode S2 of the MOS tube Q2.

[0092] In the first state, that is, the voltage of the first power supply end V_LilBat is 0, and the voltage of the second power supply end V_CR123A is greater than 0 (for example, the first battery 10 is not connected, and the second battery 20 is connected), the first switch module 30 is turned on, and the second battery 20 supplies power to the control mechanism 40 through the second power supply output end VDD_SYS.

[0093] In the second state, that is, the voltage of the second power supply end V_CR123A is 0, and the voltage of the first power supply end V_LilBat is greater than 0 (for example, the second battery 20 is not connected, and the first battery 10 is connected), the first switch module 30 is turned off, and the first battery 10 supplies power to the control mechanism 40 through the power supply output end VDD_SYS.

[0094] In the third state, that is, the voltage of the first power supply end V_LilBat and the voltage of the second power supply end V_CR123A are both greater than 0, and the voltage of the first power supply end V_LilBat is higher than a threshold voltage, the first switch module 30 is turned off, and the first battery 10 supplies power to the control mechanism 40 through the power supply output end VDD_SYS.

[0095] In the fourth state, i.e. in the case that the voltage of the first power supply end V_LilBat and the voltage of the second power supply end V_CR123A are both greater than 0, and the voltage of the first power supply end V_LilBat is equal to or lower than the threshold voltage, the first switch module 30 is turned on, and the second battery 20 supplies power to the control mechanism 40 through the power output end VDD_SYS.

[0096] For the MOS tube Q3, when the master control chip 50 monitors that the voltage of the first battery 10 is equal to or lower than the threshold voltage, a high-level control signal is output to the MOS tube Q3 through the control pin MCU_POW_CTRL, the MOS tube Q3 is turned on, and the MOS tube Q2 is turned on. At this time, the second battery 20 can supply power to the control mechanism 40 through the power output end VDD_SYS.

[0097] The anti-backflow module 80 is a MOS tube Q1, the drain D1 of the MOS tube Q1 is connected to the output end of the first power supply management module 90, the source S1 of the MOS tube Q1 is connected to the power supply end VDD_SYS of the control mechanism 40, and the gate G1 of the MOS tube Q1 is connected to the control pin MCU_POW_CTRL of the master control chip.

[0098] When the master control chip 50 does not send a control signal to the MOS tube Q1, the gate voltage of the MOS tube Q1 is 0V, and the MOS tube Q1 is closed. In the second state or the third state, the drain voltage of the MOS tube Q1 is greater than the source voltage S1, and the body diode in the MOS tube Q1 is turned on, and the first battery 10 outputs a first voltage (for example, 2.1V) to the control mechanism 40. The first voltage is used to supply power to the master control chip 50 in the control mechanism 40, and after the master control chip 50 obtains the power, a low-level control signal is output to the MOS tube Q1 through the control pin MCU_POW_CTRL to open the MOS tube Q1. After the MOS tube Q1 is opened, the drain voltage of the MOS tube Q1 is equal to the source voltage, and at this time, the first battery 10 outputs a second voltage (for example, 2.8V) to the control mechanism 40.

[0099] It should be noted that due to the voltage drop of the body diode in the MOS tube Q1, the first voltage is less than the second voltage, and the second voltage can meet the power supply demand of more control mechanisms 40.

[0100] Embodiment Two

[0101] The embodiment two provides an intelligent lock, which comprises the double-battery power supply circuit, the first battery, the second battery and the control mechanism provided in the above embodiments.

[0102] The above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A dual-battery power supply circuit for a smart lock, characterized in that, include: The first switch module has its control terminal connected to the first power supply terminal, its input terminal connected to the second power supply terminal, and its output terminal connected to the control mechanism of the smart lock. Wherein, the first power supply terminal is used to connect to the first battery, the first power supply terminal is connected to the control mechanism, and the second power supply terminal is used to connect to the second battery. When the output voltage of the first power supply terminal is greater than 0 and the output voltage of the second power supply terminal is 0, or when the output voltage of the first power supply terminal is higher than the threshold voltage and the output voltage of the second power supply terminal is greater than 0, the first switch module is in the off state, and the first battery supplies power to the control mechanism through the first power supply terminal. When the output voltage of the first power supply terminal is 0 and the output voltage of the second power supply terminal is greater than 0, or when the output voltages of both the first power supply terminal and the second power supply terminal are greater than 0 and the output voltage of the first power supply terminal is equal to or lower than the threshold voltage, the first switch module is in the conducting state, and the second battery supplies power to the control mechanism through the second power supply terminal.

2. The dual-battery power supply circuit as described in claim 1, characterized in that, The dual-battery power supply circuit also includes: The main control chip has its first sampling terminal connected to the first power supply terminal and its second sampling terminal connected to the second power supply terminal. The second switch module has its first end connected to the control terminal of the first switch module, its second end grounded, and its third end connected to the control terminal of the main control chip. When the main control chip detects that the output voltage of the first power supply terminal is equal to or lower than a preset voltage threshold, and the output voltage of the second power supply terminal is greater than 0, the main control chip controls the second switch module to turn on, so that the first switch module turns on.

3. The dual-battery power supply circuit as described in claim 1, characterized in that, The dual-battery power supply circuit also includes: The voltage divider module has its first end connected to the first power supply terminal, its second end connected to the control terminal of the first switch module, and its third end grounded, so as to divide the output voltage of the first power supply terminal and output it to the first switch module.

4. The dual-battery power supply circuit as described in claim 3, characterized in that, The voltage divider module includes a first resistor and a second resistor. The first end of the first resistor is the first end of the voltage divider module. The second end of the first resistor and the first end of the second resistor are connected together to form the second end of the voltage divider module. The second end of the second resistor is the third end of the voltage divider module.

5. The dual-battery power supply circuit as described in claim 2, characterized in that, The dual-battery power supply circuit also includes: The anti-backflow module is connected between the first power supply terminal and the control mechanism to enable unidirectional conduction between the first power supply terminal and the control mechanism.

6. The dual-battery power supply circuit as described in claim 5, characterized in that, The anti-reverse current module includes a MOS transistor, whose drain is connected to the first power supply terminal, whose source is connected to the control mechanism, and whose base is connected to the control terminal of the main control chip. When the main control chip detects that the output voltage of the first power supply terminal is equal to or lower than the preset voltage threshold, and the output voltage of the second power supply terminal is greater than 0, the main control chip controls the MOS transistor to turn off, thereby disconnecting the connection between the first power supply terminal and the control mechanism.

7. The dual-battery power supply circuit as described in any one of claims 1 to 4, characterized in that, The dual-battery power supply circuit also includes: The first power supply management module has its input end connected to the first power supply terminal and its output end connected to the control mechanism, so as to monitor and regulate the power supply process of the first battery to the control mechanism.

8. The dual-battery power supply circuit as described in any one of claims 1 to 4, characterized in that, The dual-battery power supply circuit also includes: The second power supply management module has its input terminal connected to the second power supply terminal and its output terminal connected to the input terminal of the first switch module, so as to monitor and regulate the power supply process of the second battery for the control mechanism.

9. The dual-battery power supply circuit as described in any one of claims 1 to 4, characterized in that, The capacity of the first battery is greater than the capacity of the second battery.

10. The dual-battery power supply circuit as described in any one of claims 1 to 4, characterized in that, The first battery is a lithium battery, and the second battery is a dry cell battery.

11. A smart lock, characterized in that, It includes the dual-battery power supply circuit, the first battery, the second battery, and the control mechanism as described in any one of claims 1 to 10.

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