CN218783614U

CN218783614U - Power supply system applied to electronic lock and electronic lock system

Info

Publication number: CN218783614U
Application number: CN202222904636.1U
Authority: CN
Inventors: 孙宗林; 陈其嘤; 沈煌辉
Original assignee: Highland Barley Beijing Technology Co ltd
Current assignee: Highland Barley Beijing Technology Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-03-31
Anticipated expiration: 2032-11-02

Abstract

The application discloses power supply system and electronic lock system for electronic lock. The power supply system comprises an energy conversion device, a power management chip and a first energy storage element; the energy conversion device is used for converting light energy into electric energy; the first input end of the power management chip is connected with the output end of the energy conversion device, the first output end of the power management chip is connected with the input end of the first energy storage element, and the power management chip is used for adjusting direct current acquired from the energy conversion device and outputting the adjusted direct current to the energy storage element; the output end of the first energy storage element is connected with the second input end of the power management chip, the second output end of the power management chip is connected with the on-off lock functional module of the electronic lock, and the first energy storage element outputs electric energy to the on-off lock functional module through the power management chip. Adopt above-mentioned technical scheme, can ensure that the user can both normally switch the lock all the time, reduce because the electric quantity of electronic lock crosses lowly and leads to the condition of unable normal switch lock.

Description

Power supply system applied to electronic lock and electronic lock system

Technical Field

The application relates to the technical field of electronic locks, in particular to a power supply system applied to an electronic lock and an electronic lock system.

Background

At present, the common power supply modes of the electronic lock mainly include 3. Firstly, dry batteries or lithium batteries are used for power supply. Under normal conditions, generally, 4 sections of No. 5 dry batteries can supply power for the electronic lock for more than 8 months, and if 8 dry batteries are installed, the electronic lock can be normally used for 16 months. Most lithium batteries are applied to full-automatic electronic locks, and the 5000mAh capacity lithium battery can be used for about 6 months after being fully charged. Secondly, the electronic lock is provided with an external power supply interface, and a user can use a 9V laminated battery and the like to supply power to the electronic lock externally. And thirdly, emergency power supply. Once the battery has the condition of insufficient power supply or no power, emergency power supply such as a USB interface, a typeC interface and the like of the electronic lock can be realized through a charger and the like, and the requirement of opening the door in an emergency manner is met.

When the electric quantity of electronic lock was crossed lowly, the inside electron device work of intelligence lock was in unusual low-voltage state, and the function probably goes wrong, even also can appear the condition that can't open the door through the emergent power supply of USB.

SUMMERY OF THE UTILITY MODEL

An aim at of this application provides the power supply system who can be applied to the electronic lock, and this power supply system can ensure that the user can both normally switch the lock all the time, reduces because the electric quantity of electronic lock crosses lowly and leads to the condition of unable normal switch lock.

A first aspect of the present application provides a power supply system applied to an electronic lock, including an energy conversion device, a power management chip, and a first energy storage element;

the energy conversion device is used for converting light energy into electric energy;

the first input end of the power management chip is connected with the output end of the energy conversion device, the first output end of the power management chip is connected with the input end of the first energy storage element, and the power management chip is used for adjusting direct current acquired from the energy conversion device and outputting the adjusted direct current to the first energy storage element;

the first energy storage element is used for storing the regulated direct current; the output end of the first energy storage element is connected with the second input end of the power management chip, the second output end of the power management chip is used for being connected with the switch lock functional module of the electronic lock, and the first energy storage element outputs stored electric energy to the switch lock functional module of the electronic lock through the power management chip.

With reference to the first aspect, in a possible implementation manner, the lock opening and closing function module includes an electronic lock control module and an electronic lock body module, and further includes one or more of a biometric identification module, a digital identification module, and a security authentication module.

With reference to the first aspect, in a possible implementation manner, the power management chip is a micro energy power management chip.

With reference to the first aspect, in a possible implementation manner, the power management chip includes:

the cold start circuit is used for realizing the cold start of the power management chip;

the boost regulator is respectively connected with the first input end and the first output end of the power management chip and is used for boosting the voltage input from the first input end;

and the low-dropout linear regulator is respectively connected with the second input end and the second output end of the power management chip and is used for providing stable load power supply input for the switch lock functional module of the electronic lock.

With reference to the first aspect, in a possible implementation manner, the electronic lock further includes a second energy storage element, a fifth output end of the second energy storage element is connected to an extended function module of the electronic lock, and the extended function module is a function module of the electronic lock that needs to be powered except for the unlocking/locking function module.

With reference to the first aspect, in a possible implementation manner, a fourth output end of the second energy storage element is connected to a third input end of the power management chip, and the second energy storage element is further configured to output the stored electric energy to a switch lock function module of the electronic lock through the power management chip.

With reference to the first aspect, in a possible implementation manner, the extended function module includes: the system comprises one or more of a display module, an image acquisition module, a touch screen interaction module, a human body induction module and a wireless communication module.

A second aspect of the present application provides an electronic lock system, including any kind of power supply system of the first aspect, and an electronic lock, a second output end of a power management chip in the power supply system is connected with a switch lock function module of the electronic lock.

With reference to the second aspect, in one possible implementation manner, the electronic lock includes a front panel and a rear panel, and an energy conversion device of the power supply system is mounted on at least one of the front panel and the rear panel.

The power supply system is applied to the electronic lock, can ensure that a user can normally open and close the lock all the time, and reduces the situation that the lock cannot be normally opened and closed due to the fact that the electric quantity of the electronic lock is too low. In addition, for the electronic lock without the extended function module, for example, for a common fingerprint code non-networked electronic lock, no other battery is needed, and only the aforementioned power supply system is adopted to support normal use of the electronic lock, so that the electronic lock is energy-saving and environment-friendly. For the electronic lock with the extended function module, other power supplies, such as a dry battery, a lithium battery and the like, can supply power to the extended function module only or supply power to the switch lock function module only under the condition that the first energy storage element cannot normally supply power, so that the consumption speed of other power supplies can be effectively reduced, the service time of other power supplies is prolonged, and the use experience of a user is improved. And. For the electronic lock, the situation that the lock cannot be normally opened and closed due to the fact that the electric quantity of the electronic lock is too low can be further avoided.

Drawings

Fig. 1 is a schematic structural diagram of an exemplary power supply system and an electronic lock according to the present application.

Fig. 2 is a schematic structural diagram of another exemplary power supply system and an electronic lock according to the present application.

Fig. 3 is a schematic diagram of an exemplary power supply system of the present application.

Fig. 4 is a schematic view of a partial structure of the electronic lock system of the present application.

Description of the reference numerals:

a power supply system 100; an energy conversion device 120; an output 121 of the energy conversion device; a power management chip 110; a first input 111; a first output 112; a second input terminal 113; a second output terminal 114; a third input terminal 115; a first energy storage element 130; input 131 of the first energy storage element; an output 132 of the first energy storage element; a second energy storage element 140; a fourth output terminal 141; a fifth output 142; an electronic lock 200; a switch lock function module 210; an extended function module 220; a front panel 230; a rear panel 240.

Detailed Description

For a clear and complete description of the technical solutions of the present application, the following description will be further described with reference to the embodiments and the accompanying drawings.

The electronic lock may include many different functional modules, such as a control module, an electronic lock body module, a biometric identification module, a digital identification module, a security authentication module, an image acquisition module, an image display module, a touch screen interaction module, a human body sensing module, a wireless communication module, and the like. Illustratively, the control module and other modules may be connected by UART (universal asynchronous receiver/Transmitter), I2C (Inter-integrated circuit), SPI (serial peripheral interface), or the like.

Wherein, the control module: the method is generally used for coordinating and scheduling other modules to complete the management and authentication work of the electronic lock.

The electronic lock body module: generally used for performing the functions of locking and unlocking and monitoring the state of the lock body under the control of the control module.

A biological identification module: including but not limited to modules that enable the collection and recognition of human biometric data such as fingerprints, finger veins, human faces, irises, voice, etc.

A digital identification module: including but not limited to modules that enable the collection and identification of digital keys such as passwords, door cards, cell phones, electronic keys, and the like.

A security authentication module: the method can support a symmetric algorithm (such as DES, AES, SM4, and the like) and/or an asymmetric algorithm (such as RSA, ECC, SM2, and the like), and is generally used for storing key data such as a public key, a private key, a symmetric key, a digital certificate, and the like, which are necessary for the algorithm, and for realizing secure authentication and encrypted communication between the electronic key device, the cloud service, and/or the mobile terminal application program, and the like through the algorithm.

An image acquisition module: generally, the method is used for realizing the function of acquiring images (which may include video) through an image acquisition device such as a camera. Some image acquisition modules can also have night vision capability and/or wide-angle shooting capability and the like.

An image display module: the display device is generally used for displaying image data acquired by an image acquisition module such as an output camera, and illustratively, the image data can be displayed through a display screen of an electronic lock. Of course, some electronic locks can also support displaying of the image data through mobile terminal applications such as a mobile phone APP, and can also support both display screen displaying of the electronic lock and mobile terminal application displaying.

A touch screen interaction module: through touch screen interaction modules such as a touch display screen and the like, rich information display and strong input capacity are provided, and simple and easy-to-use man-machine interaction is realized.

Human response module: generally, the electronic lock is used for realizing the automatic perception of human body approaching or moving within a certain distance range around the electronic lock through one technology or a combination of multiple technologies such as radar waves, infrared rays, ultrasonic waves and the like.

A wireless communication module: the method is generally used for establishing wireless communication with cloud services, door cards, mobile phones or electronic key equipment and the like through WiFi, BLE, NFC, zigBee, zig-Wave and other wireless communication protocols.

In a typical electronic lock system, the power supply system generally includes one or more energy storage elements, which as a whole supply all functional modules of the electronic lock that require electrical energy. As mentioned above, when the power of the power supply system is too low, the electronic devices in the functional module operate in an abnormal low voltage state, and the function may be in a problem, which may result in the situation that the door cannot be opened.

The scheme provides a power supply system applied to an electronic lock, which at least comprises a first energy storage element, wherein the energy of the first energy storage element is energy obtained by converting light energy. The functional modules (namely the functional modules of the switch lock) which are necessary for the switch lock of the electronic lock independently supply energy to the electronic lock through the power management chip and the first energy storage element, so that a user can normally switch the lock all the time, and the condition that the normal switch lock is influenced due to the fact that the electric quantity of the electronic lock is too low is reduced.

Referring to fig. 1 to 3, a power supply system 100 applied to an electronic lock according to an embodiment of the present disclosure includes an energy conversion device 120, a power management chip 110, and a first energy storage element 130.

The energy conversion device 120 is used for converting light energy into electric energy. In the embodiment of the present application, energy conversion devices in the prior art, such as solar panels/sheets, etc., may be used. When the solar cell panel/sheet is adopted, materials such as monocrystalline silicon, cadmium telluride, polycrystalline silicon, copper indium gallium selenide, amorphous silicon thin film and the like can be selected as an example, and the specific material is not limited in the application. The energy conversion device 120 has an output terminal 121, and can output the converted electric energy to other devices/apparatuses/modules.

Power management integrated circuits (powermanagement integrated circuits) 110, also referred to as power management Integrated Circuits (ICs), are chips that are burdened with converting, distributing, sensing, and/or other power management responsibilities within an electronic device system. The power management chip may convert the source voltage and/or current to a load power supply for a load such as a microprocessor, a sensor, an electronic lock function, etc. The embodiment of the application can adopt the existing power management chip, and can also adopt other possible power management chips, such as a micro-energy power management chip.

The power management chip 110 may include two input terminals and two output terminals, which are respectively referred to as a first input terminal 111, a second input terminal 113, a first output terminal 112, and a second output terminal 114 in this embodiment for convenience of distinction.

The first input end 111 of the power management chip is connected to the output end 121 of the energy conversion device, and the first output end 112 is connected to the input end 131 of the first energy storage element. The power management chip obtains the dc power output by the energy conversion device 120 through the first input terminal, adjusts the dc power, such as boosting the dc power, and then inputs the dc power to the first energy storage element 130 through the first output terminal 112 and the input terminal 131 of the first energy storage element, and stores the dc power by the first energy storage element 1130.

It should be noted that the power management chip adjusts the direct current input thereto, which may be boost or the like as an example, and the voltage boost may be implemented by an existing power management chip, for example, by a boost regulator or the like in the power management chip.

The first energy storage element 130 is mainly used for storing the regulated dc power so as to provide power to a load (e.g., some functional module of the electronic lock) when the load needs to be used. The first energy storage element 130 may be an existing energy storage element, such as a rechargeable battery, a super capacitor, a large capacitor, a solid-state battery, a nickel metal hydride (NiMH) battery, or the like. For example, a lithium battery or the like of a self-discharge current pA class may be employed in the embodiments of the present application.

Alternatively, the first energy storage element may be such that its voltage does not fall below the turn-off voltage even when the load current occasionally peaks. If a capacitor is used, the leakage current of the capacitor can be chosen as small as possible, mainly because the leakage current directly affects the quiescent current of the subsystem.

The output end 132 of the first energy storage element is connected to the second input end 113 of the power management chip, and the second output end 114 of the power management chip is used for being connected to the switch lock function module 210 of the electronic lock 200, so that the first energy storage element 130 can individually output the stored electric energy to the switch lock function module 210 of the electronic lock 200 through the power management chip 110. Namely, the switch lock functional module is used as a load, and the first energy storage element provides working voltage for the switch lock functional module through the power management chip.

It will be appreciated that the power management chip may have other inputs and/or outputs in addition to the aforementioned first input, second input, first output, second output.

A typical electronic lock includes at least a control module, an electronic lock body module, and one or more modules for authenticating the identity of a user, such as the aforementioned biometric module, digital identification module, or security authentication module. Some electronic locks further include one or more modules capable of implementing extended functions, such as an image capture module, an image display module, a touch screen interaction module, a human body sensing module, a wireless communication module, etc., so as to implement diversified advanced functions of the electronic lock.

The control module, the electronic lock module, and the module for authenticating the identity of the user are functional modules that must be used when the electronic lock is unlocked, and the unlocking and locking functional module 210 of the electronic lock in the embodiment of the present application refers to these modules.

It should be noted that, as described above, the modules used for authenticating the identity of the user may specifically include one or more modules, and for the electronic lock with different functions, the functional modules specifically included in the unlocking/locking functional module may be different. For example, for an electronic lock supporting password authentication, the unlocking and locking function module may include a control module, an electronic lock body module and a digital identification module. For another example, for an electronic lock supporting password authentication and biometric identification, the unlocking and locking function module may include one or both of a digital identification module and biometric identification in addition to the control module and the electronic lock body module.

In addition to the switch lock function module, other function modules in the electronic lock that need to be powered are referred to as an extended function module 220 in the embodiment of the present application. Illustratively, the extended function module 220 may include one or more of a display module, a networking module, a cat eye module, a video intercom module, and a human body sensing module.

For the switch lock functional module, the electric energy obtained by light energy conversion is independently supplied, so that the basic requirements for opening and closing the door can be met, the problems caused by the existing integral power supply method are avoided, the problems that the electronic device is abnormal in function and cannot normally open the door due to the fact that the battery power is too low are solved, and a user does not need to worry that the battery of the electronic lock is dead to influence the opening and closing of the door. For the extended function module that may be included in the electronic lock, other power sources, such as dry batteries, lithium batteries, etc., may be used to supply power. For the sake of distinction, the other energy sources are also referred to as second energy storage elements in the embodiments of the present application.

The second energy storage element 140 may only supply power to the extended function module 220 of the electronic lock, or may supply power to the switch lock function module 210 through the power management chip 110 when necessary.

In some implementations, the fifth output terminal 142 of the second energy storage element is connected to the extended function module 220 of the electronic lock, and is used for supplying power to the extended function module 220. In some implementations, the fourth output 141 of the second energy storage element is connected to the third input 115 of the power management chip, and the second energy storage element 140 may supply power to the switch lock function module 210 of the electronic lock through the power management chip 110.

The power supply system takes the power management chip as a core, light energy collection is carried out through energy conversion devices such as the solar cell panel, ambient light micro energy is obtained and stored in the energy storage element, and power is supplied to basic modules required by door opening and closing, such as the control module, the electronic lock body module, the biological identification module, the digital identification module and the safety authentication module of the electronic lock, so that the door opening and closing function of the electronic lock can be normally used all the time.

For an electronic lock without an extended function module, for example, an ordinary fingerprint code non-networked electronic lock, no other battery is needed, and only the aforementioned power supply system is adopted to sufficiently support the normal use of the electronic lock, so that the electronic lock is energy-saving and environment-friendly.

For an electronic lock with an extended function module, other power sources, such as a dry battery, a lithium battery, etc., may only supply power to the extended function module. In the low-power design scheme of the electronic lock, the expansion function modules do not need to be powered when the electronic lock is in a standby state, and the power supply is only needed in low-frequency operations or scenes such as management operation, networking, video acquisition and display. Therefore, the power supply system can effectively reduce the consumption speed of other power supplies, prolong the service time of the other power supplies and improve the use experience of users.

In some implementations, the power management chip 110 can employ a micro-energy power management chip. The micro-energy power management chip in the embodiment of the application can integrate the functions of energy management, charge and discharge management, energy storage device management and the like. The micro-energy power management chip can realize cold start under a very low energy input scene, and can obtain direct current from energy conversion devices such as a solar cell panel after start, charge for first energy storage elements such as a rechargeable battery or a super capacitor, and can provide stable working voltage for a door lock through an LDO (low dropout regulator) and the like.

Referring to fig. 3, in some possible implementations, it may include, in addition to the aforementioned two inputs and two outputs: a cold start unit, a boost regulator, a low-voltage linear difference regulator and the like.

And the cold start unit is mainly used for realizing the cold start of the power management chip. For example, some cold start units may enable low power or ultra-low power cold start of a chip in a low energy input scenario (e.g., 400mV input voltage). In some implementations, the cold start unit can be implemented by an existing cold start circuit.

The boost regulator, also called boost converter, is respectively connected to the first input end 111 and the first output end 112 of the power management chip, and is mainly used for boosting the voltage input from the first input end 111.

And a Low-dropout regulator (LDO) respectively connected to the second input terminal 113 and the second output terminal 114 of the power management chip, and mainly used for providing a stable load power input for the switch lock function module 210 of the electronic lock.

Optionally, the power management chip may further include a battery management module, configured to manage the first energy storage element, the second energy storage element, and other possible energy storage elements, and other modules in the battery management chip. Illustratively, for example: carrying out overcharge and over-discharge protection parameter configuration on a rechargeable battery or a super capacitor (such as a first energy storage element in the embodiment of the application); prompting when the battery is exhausted; prompting when the LDO is available; if a standby primary battery is accessed, when the energy storage batteries (such as the first energy storage element and the second energy storage element in the embodiment of the application) are exhausted, the primary battery is automatically switched; and when the energy storage battery recovers, the energy storage battery is automatically switched to.

Optionally, in some implementations, the power management chip further includes a Maximum Power Point Tracking (MPPT) module configured for the boost regulator. Exemplarily, the MPPT controller can detect the generated voltage of the energy conversion devices such as the solar panel in real time by detecting the MPPT open-circuit voltage at a time, and track the maximum voltage and current value, so that the system can keep the maximum power output to charge the first energy storage element. The MPPT in the embodiment of the present application may use an existing module/device/apparatus.

Optionally, a buck regulator, also referred to as a buck converter, may also be included in the power management chip to regulate the voltage if needed.

The power supply system in the embodiment of the present application may have a plurality of different modes, such as a sleep mode, an awake mode, a normal operation mode, an overvoltage mode, a standby mode, an off mode, and the like. The power supply system including the first energy storage element, the second energy storage element and the power management chip will be taken as an example to describe the operation conditions in different modes.

(1) Sleep mode

In the sleep mode, all nodes in the system are deeply discharged, and no available energy is collected by the power management chip.

(2) Wake-up mode

When the wake-up pin satisfies the cold start voltage and the minimum power input, the power management chip is activated to enter a wake-up mode, the voltages of the boost converter and the buck converter rise, and then the voltage of the boost converter rises to the maximum voltage that the first energy storage element can bear alone. During cold start, the LDOs are all internally disabled with no output. If the voltage of the first energy storage element is lower than the minimum voltage required by the first energy storage element, the first energy storage element needs to be charged until the voltage reaches the maximum voltage which can be borne by the first energy storage element, and when the voltage of the first energy storage element exceeds the maximum voltage which can be borne by the first energy storage element, the circuit enters a normal mode again.

(3) Normal mode

When the power management chip enters the normal mode, the following three situations may generally occur in the working process:

(1) the power provided by the input source is equivalent to the load power, the voltage of the first energy storage element is kept between the lowest voltage and the highest voltage which can be borne by the first energy storage element, and the circuit is kept in a normal mode;

(2) the power provided by the input source exceeds the power consumed by the load, the voltage of the first energy storage element gradually exceeds the maximum voltage which can be borne by the first energy storage element, and the circuit enters an overvoltage mode;

(3) the power provided by the input source is lower than the power consumed by the load, the voltage of the first energy storage element gradually decreases to be lower than the lowest voltage borne by the first energy storage element, and the circuit enters a shutdown mode. If a backup battery (e.g., the aforementioned second energy storage element) is connected in the system, the circuit will enter a backup mode.

(4) Overvoltage mode

When the voltage of the first energy storage element reaches the maximum voltage that can be borne by the first energy storage element, the charging is completed, the voltage value of the first energy storage element is kept near the maximum voltage, and the hysteresis of a few millivolts is provided so as to prevent the first energy storage element and the internal circuit from being damaged. In this configuration, the boost converter is periodically activated to maintain the first energy storage element voltage, and the output of the LDO is still available.

(5) Standby mode: if the standby battery is connected, the standby battery becomes a new input source and is kept in the mode until the voltage of the first energy storage element reaches the maximum voltage which can be borne by the first energy storage element, and the circuit enters the normal mode. If the power supplied by the input source is not less than the power consumed by the load, the backup battery may not be accessed.

(6) An off mode: when the voltage of the first energy storage element is reduced to be lower than the lowest voltage which can be borne by the first energy storage element and the standby battery cannot supply power, the circuit enters a shutdown mode to prevent the first energy storage element from being damaged and the LDO from being unstable due to deep discharge. The LDOs remain enabled. If the energy of the input source is available and the first energy storage element voltage recovers to the maximum voltage that it can withstand within a short time (e.g., 600 ms), the power management chip returns to normal mode. However, if after a short time (e.g. 600 ms) the first energy storage element voltage does not reach its maximum voltage it can withstand, the circuit enters a sleep mode.

Referring to fig. 1 and fig. 4, an electronic lock system is further provided in an embodiment of the present application, where the electronic lock system includes any one of the foregoing power supply systems 100 and an electronic lock 200, and the second output terminal 114 of a power management chip in the power supply system 100 is connected to a switch lock function module 210 of the electronic lock. In some implementations, the electronic lock 200 includes a front panel 230 and a rear panel 240, and the aforementioned energy conversion device 120, such as a solar panel or the like, is mounted on at least one of the front panel 230 and the rear panel 240.

For the structure of the power supply system and the related structure of the electronic lock, reference may be made to the related description above, and details are not repeated here.

The starting power of different power management chips and the energy required by different electronic locks for maintaining daily standby, locking and unlocking and the like may be different, and parameters of the energy conversion device, such as the area of the solar panel, can be measured and adjusted according to actual requirements of the power management chips, the electronic locks, the environments where the electronic locks are located and the like, so as to ensure that a power supply system of the electronic locks can ensure the normal use of the door opening and closing function.

For example, the energy supply effect of the aforementioned power supply system will be described and verified in some of the measured data below.

The illumination intensity and energy corresponding to different environments are different. The illuminance is generally identified in Lux (legal notation lx) illuminance units, with a 1 Lux equal to 1 flow (lm) luminous flux uniformly distributed over 1m ² The illuminance of the area. Light (es)The relationship between the illuminance and the environment can be referred to as the following table 1.

TABLE 1

/>

Firstly, the power supply system is adopted on the electronic lock, so that the cold start of the power management chip can be met, and the electronic lock can continuously and stably work.

Taking a 2.5cm × 2.5cm single crystal silicon solar panel as an example for evaluation, the power that can be provided in 4 different environments is shown in table 2 below.

TABLE 2

It can be seen that the amount of power that can be provided in room natural light conditions is relatively small compared to the other ambient conditions in table 2, but the micro energy management chip can be maintained in operation even in room natural light conditions by using a 2.5cm x 2.5cm single crystal silicon solar panel because the micro energy management chip has a low power-on (e.g., 15 μ W or less). The size of the solar panels mounted on the front and rear panels of the electronic lock is generally more than 20cm × 5cm, so that if the solar panels mounted on the front and rear panels of the electronic lock are larger than the size, sufficient energy can be provided to maintain the micro energy management chip to operate stably.

Secondly, the power supply system is adopted on the electronic lock, so that the standby current of the electronic lock can be met, and the standby of the electronic lock system can be maintained sufficiently.

In an area of 71cm ² In a 480Lx indoor natural light environment, the output voltage of the solar panel is 2V, the current is 0.5mA, the boosting efficiency is calculated according to 90%, and the energy storage amount in 12 hours is 38880mWs. The standby current of the door lock is less than 50uA, and 24 hours are waited forThe total consumption was 32400mWs. See table 3 for specific parameters used and calculation results. Therefore, the indoor natural light is enough to maintain the energy consumed by the system in standby state only by irradiating for 12 hours. If the light is enhanced, the irradiation time is prolonged or the area of the energy-saving plate is increased, the total stored energy is far larger than the total consumed energy in the standby state, and the standby state of the system is maintained sufficiently.

TABLE 3

Moreover, the electronic lock can also support the unlocking function of the electronic lock by adopting the power supply system.

Also in an area of 71cm ² For example, in a 480Lx indoor natural light environment, the output voltage of the solar panel is 2V, the current is 0.5mA, the boosting efficiency is calculated according to 90%, and the energy storage capacity in 12 hours is 38880mWs.1 time of unlocking process, the consumption of the door lock is 9210mWs. See table 4 for specific parameters used and calculation results. Therefore, 480Lx indoor natural light irradiation for 12 hours can satisfy 5 times of unlocking. If the light is increased, the irradiation time is lengthened or the area of the panel is increased too much, the number of supportable unlocks will also increase. For example, the panel of the electronic lock can be provided with 2 panels with an area of 71cm ² The cadmium telluride solar panel can meet the energy required by 10 times of unlocking after 480Lx indoor natural light irradiation for 12 hours, and can meet the energy requirement of a household lock.

TABLE 4

Therefore, the electronic lock can meet the energy requirements of daily standby and lock opening and closing by adopting the power supply system, and the condition that the battery is dead does not need to be worried.

Some schemes that adopt the photovoltaic board to supply power to the electronic lock, a plurality of photovoltaic boards are connected with the power management chip through a plurality of diodes respectively, can have the forward voltage drop of diode to account for in power supply system too big and to final output voltage great problem. Specifically, the forward voltage drop of the diode is large, and in general, the voltage drop of a silicon diode is about 0.6V. The photovoltaic panels with different specifications have different voltages, the output voltage of a single silicon solar cell is about 0.4V, a plurality of solar cells are connected in series to achieve the available voltage, and the solar cells are connected in parallel to output larger current. The solar cell modules are connected in series and in parallel for packaging protection, so that a large-area solar cell module can be formed. Due to the size limitation of the door lock panel, the solar cells capable of being connected in series and in parallel are limited, which results in a lower output voltage of the photovoltaic panel. In addition, the forward voltage drop of the diode is large in the electronic lock power supply system, and further the influence on the final output voltage is large, so that the final output voltage is possibly too low or the power supply system cannot work normally. Some schemes employ multiple power source processing chips, which may result in low overall efficiency of the power supply system and large loss of the multiple power source processing chips. Some schemes adopt an energy storage capacitor, but the energy storage efficiency is low due to large self-discharge current of the energy storage capacitor, and the problem that the super capacitor adopting self-discharge of more than 20 muA can not be charged under the condition of weak illumination can be caused.

Compared with the schemes, the power supply system in the embodiment of the application is particularly suitable for the electronic lock, the power consumption, the self-discharge current and the like of the power supply system are small, the energy conversion device is arranged on the panel of the electronic lock with the conventional size and can provide the energy required by normal locking and unlocking of the electronic lock, and the energy requirements of standby and normal locking and unlocking of the electronic lock can be met even under the condition of indoor weak illumination and the like.

It will be appreciated that, in order to avoid extreme situations, the electronic lock may also be supplemented by another backup power supply (e.g. the aforementioned second energy storage element), which assists in supplying power to the switch lock function module in the case where the first energy storage element is not normally supplying power.

It should be understood that, for the convenience of clearly describing the technical solutions of the embodiments of the present application, the words "first", "second", and the like are used in the embodiments of the present application to distinguish the same or similar items with basically the same functions and actions, or the concepts with certain differences. Those skilled in the art will appreciate that the terms "first," "second," and the like do not denote any order or importance, but rather the terms "first," "second," and the like do not denote any order or importance.

It should also be understood that in the structural description of the present application, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate an orientation or positional relationship generally based on that shown in the figures. These directions and positional relationships are for convenience of description and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the application.

It is also to be understood that, in the description of the present application, unless specifically limited otherwise, the term "coupled" is to be interpreted broadly, e.g., as either a direct coupling or an indirect coupling via an intermediary. Those skilled in the art can understand the specific meaning of the above terms in the present application according to specific situations.

The same and similar parts among the various embodiments in this specification may be referred to each other. The different implementations in the above embodiments may be combined with each other as long as they are not contradictory. The above embodiments do not limit the scope of the present invention.

Claims

1. A power supply system applied to an electronic lock is characterized by comprising an energy conversion device, a power management chip and a first energy storage element;

2. The power supply system of claim 1, wherein the on-off lock function module comprises an electronic lock control module and an electronic lock body module, and further comprises one or more of a biometric module, a digital identification module, and a security authentication module.

3. The power supply system of claim 1, wherein the power management chip is a micro-energy power management chip.

4. The power supply system of claim 1, wherein the power management chip comprises:

the boost regulator is respectively connected with the first input end and the first output end of the power management chip and used for boosting the voltage input from the first input end;

and the low dropout linear regulator is respectively connected with the second input end and the second output end of the power management chip and is used for providing stable load power supply input for the switch lock functional module of the electronic lock.

5. The power supply system according to any one of claims 1 to 4, further comprising a second energy storage element, wherein a fifth output terminal of the second energy storage element is connected to an extended function module of the electronic lock, and the extended function module is a function module of the electronic lock that needs to be powered except for the switch lock function module.

6. The power supply system of claim 5, wherein the fourth output terminal of the second energy storage element is connected to the third input terminal of the power management chip, and the second energy storage element is further configured to output the stored electric energy to the switch lock function module of the electronic lock through the power management chip.

7. The power supply system according to claim 5, wherein the extended function module includes: the system comprises one or more of a display module, an image acquisition module, a touch screen interaction module, a human body induction module and a wireless communication module.

8. An electronic lock system, characterized in that, includes the power supply system of any one of claims 1-7, and an electronic lock, and the second output terminal of the power management chip in the power supply system is connected with the switch lock function module of the electronic lock.

9. The electronic lock system of claim 8, wherein the electronic lock comprises a front panel and a rear panel, at least one of the front panel and the rear panel having an energy conversion device of the power supply system mounted thereon.