Intelligent door lock power supply circuit and system

Abstract

The invention provides an intelligent door lock power supply circuit and system, the intelligent door lock power supply circuit comprises a main battery module and a standby battery module which are connected with each other, when a main battery in the main battery module is electrified, the main battery supplies power to an electric component of an intelligent door lock and charges a standby battery in the standby battery module, and when the main battery is out of power, the main battery supplies power to the electric component of the intelligent door lock and charges the standby battery in the standby battery module. In this way, the standby battery can supply power to the electric components of the intelligent door lock, a user does not need to carry, borrow or purchase a power bank, and therefore the experience feeling of the user on the intelligent door lock is improved.

Description

Technical Field

[0001] This invention relates to the field of smart door lock technology, and in particular to a power supply circuit and system for a smart door lock. Background Technology

[0002] Currently, most smart door locks on the market use lithium batteries or dry cell batteries and are equipped with an emergency USB power bank port to solve the problem of sudden battery failure that prevents users from opening the door. For example, if a user is away for a long time and returns home, the battery may suddenly be dead, making it impossible to open the door. However, in such cases, users need to carry a power bank to charge the smart door lock via the USB power bank port. If users forget to bring a power bank, they may need to borrow one from someone else or buy one, which reduces the user's experience with smart door locks. Summary of the Invention

[0003] The purpose of this invention is to provide a power supply circuit and system for smart door locks, so as to improve the user experience of smart door locks.

[0004] This invention provides a power supply circuit for a smart door lock. The power supply circuit includes: a main battery module and a backup battery module connected to each other, and the main battery module and the backup battery module are respectively connected to the power-consuming components of the smart door lock. The main battery module is used to supply power to the power-consuming components of the smart door lock when the main battery in the main battery module has power, and to charge the backup battery in the backup battery module. The backup battery module is used to supply power to the power-consuming components of the smart door lock through the backup battery when the main battery in the main battery module has no power and an emergency unlocking signal sent by the user is received.

[0005] Furthermore, the main battery module includes a first main battery and a second main battery; the main battery module is also used to supply power to the electrical components of the smart door lock through the first main battery when the power of the first main battery is higher than that of the second main battery, and to charge the backup battery in the backup battery module.

[0006] Furthermore, the main battery module is also used to supply power to the electrical components of the smart lock through the second main battery when the power of the first main battery is lower than that of the second main battery, and to charge the backup battery in the backup battery module.

[0007] Furthermore, the main battery module is also used to supply power to the electrical components of the smart lock through the first main battery or the second main battery when the power of the first main battery is equal to the power of the second main battery, and to charge the backup battery in the backup battery module.

[0008] Furthermore, the backup battery module is used to charge the main battery when the main battery in the main battery module is out of power and an emergency unlocking signal is received, so that the charged main battery can power the electrical components of the smart door lock.

[0009] Furthermore, the main battery module includes: The first main battery has a charging terminal, a positive terminal, and a negative terminal, with the negative terminal grounded. The second main battery has its negative terminal grounded. The first diode has its anode connected to the positive terminal of the first main battery and its cathode connected to the power-consuming components of the smart door lock. The second diode has its anode connected to the positive terminal of the second main battery and its cathode connected to the power-consuming components of the smart door lock. The third diode has its anode connected to the charging terminal of the first main battery and its cathode connected to the cathode of the first diode.

[0010] Furthermore, the backup battery module includes: The backup battery has a charging terminal, a positive terminal, and a negative terminal. Its charging terminal is connected to the cathode of the second diode, and its negative terminal is grounded. An emergency switch has its first terminal connected to the positive terminal of a backup battery and its second terminal connected to the anode of a third diode; it is used to generate an emergency unlocking signal when the emergency switch is turned on according to user operation.

[0011] Furthermore, the power supply circuit also includes: a Type C terminal; the Type C terminal is connected to the anode of the third diode; the Type C terminal is used to charge the first main battery through the external charging device when connected to an external charging device; to supply power to the electrical components of the smart lock through the third diode, and to charge the backup battery.

[0012] Furthermore, the electrical components include: a microcontroller, a peephole, and a motor.

[0013] The present invention provides a smart door lock power supply system, comprising: a voltage conversion module, and a smart door lock power supply circuit of any of the above; the voltage conversion module is used to convert the power supply voltage provided by the main battery module or the backup battery module in the smart door lock power supply circuit to obtain a converted voltage, and to supply power to the electrical components of the smart door lock through the converted voltage.

[0014] This invention provides a power supply circuit and system for a smart door lock, comprising a main battery module and a backup battery module connected to each other. When the main battery in the main battery module is charged, it supplies power to the electrical components of the smart door lock and charges the backup battery in the backup battery module. When the main battery is depleted, the backup battery can supply power to the electrical components of the smart door lock. Users do not need to carry, borrow, or purchase a power bank, thereby improving the user experience of the smart door lock. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a power supply circuit for a smart door lock provided in an embodiment of the present invention; Figure 2 A schematic diagram of another intelligent door lock power supply circuit provided in an embodiment of the present invention; Figure 3(a) is a schematic diagram of an expansion board circuit provided in an embodiment of the present invention; Figure 3(b) is a schematic diagram of another expansion board circuit provided in an embodiment of the present invention; Figure 3(c) is a schematic diagram of another expansion board circuit provided in an embodiment of the present invention; Figure 4 A power supply circuit diagram of a front locking plate provided in an embodiment of the present invention; Figure 5 A schematic diagram of the front and rear locking plates of a smart door lock provided in an embodiment of the present invention; Figure 6 A schematic diagram of battery parameters for a backup battery provided in an embodiment of the present invention; Figure 7 This is a physical schematic diagram of a backup battery provided in an embodiment of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In related technologies, when a smart lock's battery runs out of power unexpectedly, the user needs to carry a power bank to charge the smart lock via its USB power port. If the user forgets to bring a power bank, they may need to borrow one from someone else or buy one. This reduces the user's experience with the smart lock. Based on this, this invention provides a smart lock power supply circuit and system, which can be applied to smart lock application scenarios.

[0019] To facilitate understanding of this embodiment, a power supply circuit for a smart door lock disclosed in this embodiment of the invention will first be described. This power supply circuit can be integrated into the smart door lock; for example... Figure 1 As shown, the power supply circuit includes a main battery module 10 and a backup battery module 11 connected to each other. The main battery module 10 and the backup battery module 11 are respectively connected to the power-consuming components of the smart door lock; for example, the power-consuming components can be the microcontroller, peephole, motor, etc. of the smart door lock. The main battery module 10 is used to supply power to the electrical components of the smart lock when the main battery in the main battery module 10 has power, and to charge the backup battery in the backup battery module 11; the backup battery module 11 is used to supply power to the electrical components of the smart lock through the backup battery when the main battery in the main battery module 10 has no power and an emergency unlocking signal sent by the user is received.

[0020] In actual implementation, the main battery module 10 contains a main battery. When the main battery has power, it supplies power to the electrical components of the smart lock, enabling the smart lock to open and close normally and ensuring normal user operation. The backup battery in the backup battery module 11 will not be activated. At the same time, since the main battery module 10 is also connected to the backup battery module 11, the main battery in the main battery module 10 can also charge the backup battery in the backup battery module 11 until the backup battery is fully charged, thus ensuring that the backup battery is always fully charged.

[0021] When the main battery is dead and the user needs to unlock the door in an emergency, they can trigger the relevant button on the smart lock to send an emergency unlocking signal to activate the backup battery. This backup battery can then power the electrical components of the smart lock, allowing it to open and close normally.

[0022] The aforementioned smart lock power supply circuit includes a main battery module and a backup battery module connected to each other. When the main battery in the main battery module has power, it supplies power to the electrical components of the smart lock and charges the backup battery in the backup battery module. When the main battery is depleted, the backup battery can supply power to the electrical components of the smart lock. Users do not need to carry, borrow, or purchase a power bank, thereby improving the user experience of the smart lock.

[0023] The number of main batteries in the main battery module can be one or more, and can be set according to actual needs, which is not limited here; in one embodiment, the main battery module includes: a first main battery and a second main battery; The main battery module is also used to power the electrical components of the smart lock through the first main battery when the power of the first main battery is higher than that of the second main battery, and to charge the backup battery in the backup battery module.

[0024] The main battery module is also used to power the electrical components of the smart lock through the second main battery when the power of the first main battery is lower than that of the second main battery, and to charge the backup battery in the backup battery module.

[0025] The main battery module is also used to supply power to the electrical components of the smart lock through the first or second main battery when the power of the first main battery is equal to that of the second main battery, and to charge the backup battery in the backup battery module.

[0026] In this embodiment, the power level of the first main battery can be understood as its current remaining power, and the power level of the second main battery can be understood as its current remaining power. The power levels of the first and second main batteries may be the same or different. When the power level of the first main battery is higher than that of the second main battery, the first main battery can supply power to the electrical components and charge the backup battery. When the power level of the second main battery is higher than that of the first main battery, the second main battery can supply power to the electrical components and charge the backup battery. When the power levels of the first and second main batteries are the same, either main battery can supply power to the electrical components and charge the backup battery.

[0027] Furthermore, the backup battery module is used to charge the main battery when the main battery in the main battery module is out of power and an emergency unlocking signal is received, so that the charged main battery can power the electrical components of the smart door lock.

[0028] In practical implementation, when the main battery is depleted and the user needs to unlock the door urgently, the relevant button on the smart lock can be triggered to send an emergency unlocking signal. At this time, the backup battery can be activated. When unlocking with the backup battery's power, the user usually needs to press and hold the relevant button, which may require the user to hold the button with one hand and operate the lock with the other. This is not very convenient for the user. In this case, the user can also press and hold the relevant button for a preset time, such as 3 seconds or 5 seconds. During this time period, the backup battery can charge the main battery. After the user releases the relevant button, the main battery can continue to power the electrical components, and the user can unlock the door normally, which is more convenient for the user.

[0029] Furthermore, such as Figure 2The diagram shows another power supply circuit for a smart door lock, where the main battery module includes: The first main battery BTT1 has a charging terminal, a positive terminal, and a negative terminal, with the negative terminal grounded. The second main battery BTT2 has its negative terminal grounded. The appropriate first main battery BTT1 and second main battery BTT2 can be selected according to actual needs. Usually, the same model of first main battery BTT1 and second main battery BTT2 are selected.

[0030] The first diode D2 has its anode connected to the positive terminal of the first main battery BTT1, and its cathode connected to the power supply component of the smart door lock. The second diode D3 has its anode connected to the positive terminal of the second main battery BTT2, and its cathode connected to the power supply component of the smart door lock. The appropriate first diode D2 and second diode D3 can be selected according to actual needs. Usually, the same model of first diode D2 and second diode D3 are selected. For example, the same model of Schottky diode can be selected.

[0031] The third diode D4 has its anode connected to the charging terminal of the first main battery BTT1, and its cathode connected to the cathode of the first diode D2. A suitable third diode D4 can be selected according to actual needs; this third diode can be the same as or different from the second diode D2 and the second diode D3.

[0032] Furthermore, such as Figure 2 As shown, the backup battery module includes: The backup battery BTT3 has a charging terminal, a positive terminal, and a negative terminal. Its charging terminal is connected to the cathode of the second diode D3, and its negative terminal is grounded. A suitable backup battery BTT3 can be selected according to actual needs. Since the backup battery BTT3 is mainly used in emergency situations, compared with the first main battery BTT1 and the second main battery BTT2, the backup battery BTT3 can be a battery with a relatively smaller capacity.

[0033] Emergency switch K1 has its first terminal connected to the positive terminal of backup battery BTT3, and its second terminal connected to the anode of third diode D4; it is used to generate an emergency unlocking signal when emergency switch K1 is activated according to user operation. Figure 2 As can be seen, the first end of the emergency switch K1 corresponds to the common connection terminal of pins 1 and 2 of the emergency switch K1, and the second end of the emergency switch K1 corresponds to the common connection terminal of pins 3 and 4 of the emergency switch K1. In actual implementation, when the main battery is dead and the user needs to unlock the door in an emergency, the relevant button on the smart door lock can be triggered to turn on the emergency switch K1. At this time, an emergency unlocking signal can be generated to activate the backup battery. Then, the backup battery can supply power to the electrical components of the smart door lock, so that the smart door lock can open and close normally.

[0034] Furthermore, such as Figure 2 As shown, the power supply circuit also includes: a Type C terminal; the Type C terminal is connected to the anode of the third diode D4; the Type C terminal is used to charge the first main battery BTT1 through the external charging device when connected to an external charging device; to supply power to the electrical components of the smart door lock through the third diode D4; and to charge the backup battery BTT3.

[0035] In actual implementation, the smart door lock has a Type-C port with a Type-C terminal. Users can connect external charging devices such as power banks to this Type-C port, and then charge the first main battery BTT1 through the charging terminal. The Type-C terminal is internally connected to the third diode D4, which can directly supply power to the electrical components and can also charge the backup battery BTT3 through the charging terminal. At the same time, the third diode D4 can also prevent reverse current surges.

[0036] Figure 3(a) shows a schematic diagram of an expansion board circuit, which corresponds to... Figure 2 The circuit diagram of the expansion board for the first main battery BTT1 in Figure 3(a) is shown below. In Figure 3(a), pins 1, 2, and 3 correspond to the positive, charging, and negative terminals of the first main battery BTT1, respectively. Figure 3(b) shows another schematic diagram of the expansion board circuit, which corresponds to... Figure 2 The circuit diagram of the expansion board for the second main battery BTT2 is shown in Figure 3(b). In Figure 3(b), pins 1 and 3 correspond to the positive and negative terminals of the second main battery BTT2, respectively, while pin 2 is left floating. Figure 3(c) shows another schematic diagram of the expansion board circuit, which corresponds to... Figure 2 The circuit diagram of the expansion board of the backup battery BTT3 is shown in Figure 3(c), where pins 1, 2 and 3 correspond to the positive terminal, charging terminal and negative terminal of the backup battery BTT3, respectively.

[0037] Smart door locks typically consist of a front lock plate and a rear lock plate, which can be connected via appropriate connectors. For example... Figure 4 The diagram shows a power circuit for a front lock plate. A button is connected to pins 1 and 2 of expansion connector J6, and pins 3 and 4 of expansion connector J6 can be connected to a Type-C terminal. Only when the button is pressed will the backup battery be connected to the emergency power port to power the entire smart lock. It should be noted that the VBAT_USB network signal is equivalent to the VBAT_C+ network signal; the only difference is the naming convention between the front and rear lock plates.

[0038] Furthermore, the electrical components include: a microcontroller, a peephole, and a motor. In a smart lock, the microcontroller is the control core, responsible for coordinating the operation of various functional modules (such as fingerprint recognition, password verification, and communication). The peephole is the monitoring component of the smart lock, typically equipped with a camera and display screen, supporting human detection, infrared night vision, and video intercom functions. The motor is used to drive the automatic unlocking or locking of the bolt. In practical implementation, the main battery and backup battery in the smart lock can provide the necessary power to the microcontroller, peephole, motor, and other electrical components.

[0039] See Figure 5 The diagram shows the front and rear lock plates of a smart door lock, including a peephole lens, a front lock plate, and a rear lock plate; as shown. Figure 6 The diagram shown illustrates the battery parameters of a backup battery. Of course, a suitable backup battery can be selected based on actual needs; for example... Figure 7 The diagram shows a physical schematic of a backup battery, where, from left to right, the positive terminal, the charging terminal, and the negative terminal of the backup battery are shown.

[0040] This invention provides a smart door lock power supply system, which incorporates a backup battery within the smart door lock. This backup battery can replace a power bank, providing emergency unlocking capability when the main battery of the smart door lock is depleted. The circuit design requires the backup battery to maintain a fully charged state for extended periods and to automatically recharge until fully charged after emergency use.

[0041] This circuit design provides a built-in emergency backup battery, essentially embedding a power bank inside the door lock. This solves the pain point of users having to carry, borrow, or buy a power bank when the main battery is dead. It also solves the problem of smart door locks suddenly running out of power and being unable to open. Furthermore, it allows users to open the door via an external button without needing a power bank, greatly improving the convenience and user experience of smart door locks.

[0042] This invention also provides a smart door lock power supply system, including: a voltage conversion module and a smart door lock power supply circuit of any of the above; the voltage conversion module is used to convert the power supply voltage provided by the main battery module or the backup battery module in the smart door lock power supply circuit to obtain a converted voltage, and to supply power to the electrical components of the smart door lock through the converted voltage.

[0043] In practical implementation, smart locks typically have multiple power-consuming components, each requiring a different supply voltage. The supply voltage provided by the main or backup battery module in the smart lock's power supply circuit may not be suitable for every power-consuming component. Therefore, a voltage conversion module can be used to convert the supplied supply voltage to a converted voltage, which can then provide the necessary supply voltage to each power-consuming component, thus ensuring the normal operation of each component.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An intelligent door lock power supply circuit, characterized by, The power supply circuit comprises a main battery module and a backup battery module connected with each other, and the main battery module and the backup battery module are connected with the power consuming components of the smart door lock respectively; The main battery module is configured to supply power to the power consuming components of the smart door lock when the main battery in the main battery module has power, and charge the backup battery in the backup battery module; The backup battery module is configured to supply power to the power consuming components of the smart door lock by the backup battery when the main battery in the main battery module has no power and an emergency unlocking signal sent by a user is received.

2. The power supply circuit according to claim 1, characterized in that, The main battery module comprises a first main battery and a second main battery; The main battery module is further configured to supply power to the power consuming components of the smart door lock by the first main battery when the power of the first main battery is higher than the power of the second main battery, and charge the backup battery in the backup battery module.

3. The power supply circuit of claim 2, wherein The main battery module is further configured to supply power to the power consuming components of the smart door lock by the second main battery when the power of the first main battery is lower than the power of the second main battery, and charge the backup battery in the backup battery module.

4. The power supply circuit of claim 2, wherein The main battery module is further configured to supply power to the power consuming components of the smart door lock by the first main battery or the second main battery when the power of the first main battery is equal to the power of the second main battery, and charge the backup battery in the backup battery module.

5. The power supply circuit of claim 1, wherein, The backup battery module is configured to charge the main battery by the backup battery when the main battery in the main battery module has no power and an emergency unlocking signal is received, so as to supply power to the power consuming components of the smart door lock by the charged main battery.

6. The power supply circuit of claim 1, wherein, The main battery module comprises: The first main battery has a charging end, a positive electrode end and a negative electrode end, and the negative electrode end is grounded; The second main battery has a negative electrode end grounded; The first diode has an anode connected with the positive electrode end of the first main battery and a cathode connected with the power consuming components of the smart door lock; The second diode has an anode connected with the positive electrode end of the second main battery and a cathode connected with the power consuming components of the smart door lock; The third diode has an anode connected with the charging end of the first main battery and a cathode connected with the cathode of the first diode.

7. The power supply circuit of claim 6, wherein, The backup battery module comprises: The backup battery has a charging end, a positive electrode end and a negative electrode end, the charging end is connected with the cathode of the second diode, and the negative electrode end is grounded; The emergency switch has a first end connected with the positive electrode end of the backup battery and a second end connected with the anode of the third diode, and is configured to generate an emergency unlocking signal when the emergency switch is turned on according to user operation.

8. The power supply circuit of claim 6, wherein The power supply circuit further comprises a Type C terminal; the Type C terminal is connected to an anode of the third diode; the Type C terminal is used to charge the first main battery through an external charging device when the external charging device is connected; the third diode is used to supply power to the power-consuming components of the smart door lock and charge the backup battery.

9. The power supply circuit of claim 1, wherein, The power-consuming components comprise a single-chip microcomputer, a cat eye and a motor.

10. A smart door lock power supply system, characterized by, The smart door lock power supply circuit comprises: a voltage conversion module and the smart door lock power supply circuit according to any one of claims 1-9; The voltage conversion module is used to convert a power supply voltage provided by the main battery module or the backup battery module in the smart door lock power supply circuit to obtain a conversion voltage, and supply power to the power-consuming components of the smart door lock through the conversion voltage.

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