CN110907842B - Intelligent door lock electric quantity detection device and method and intelligent door lock - Google Patents
Intelligent door lock electric quantity detection device and method and intelligent door lock Download PDFInfo
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- CN110907842B CN110907842B CN201911213087.XA CN201911213087A CN110907842B CN 110907842 B CN110907842 B CN 110907842B CN 201911213087 A CN201911213087 A CN 201911213087A CN 110907842 B CN110907842 B CN 110907842B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
Abstract
The invention provides a battery electric quantity detection device of an intelligent door lock, wherein the intelligent door lock comprises a battery and a motor module, and the electric quantity detection device comprises a control module; the control module is respectively electrically connected with the battery and the motor module and used for collecting the floating voltage of the battery after receiving a door lock operation instruction input by a user, connecting the motor module with the battery to control the motor module to work, detecting the current internal resistance of the battery, calculating the dropping voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module, and judging the electric quantity state of the battery by using the dropping voltage and the floating voltage. The application also provides a method and an intelligent door lock. The judgment error caused by the difference of batteries of different manufacturers can be effectively solved, the judgment error that the high voltage of the battery cannot actually improve enough energy due to the difference of the temperature of the use environment is avoided, the detection accuracy of the residual electric quantity of the battery is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the field of intelligent home furnishing, in particular to an intelligent door lock electric quantity detection device and method and an intelligent door lock.
Background
The development of the smart home industry brings huge changes to the life of people, for example, compared with a common door lock, the smart door lock has the advantages that the networking function is added, the use scene of people is expanded, a user can control the lock without being beside the lock, and when the user is not at home and a temporary user needs to open the door lock, the mode adopted at present is that the user directly remotely unlocks the door through a mobile phone to open the door of the temporary user. The current intelligent door lock generally adopts a battery power supply mode, and because the energy consumption of the door lock is large, a user needs to determine whether to replace a battery according to the electric quantity condition of the intelligent door lock. In the prior art, two methods for judging the electric quantity of a battery by using a door lock exist at present:
one way is to collect the voltage of the battery and judge whether the battery has sufficient electric quantity according to the voltage of the battery; however, batteries of different brands have different electric quantities under the same voltage condition, and the battery electric quantities corresponding to the battery voltages are also different under different environmental temperatures, that is, the battery voltages cannot accurately represent the electric quantities of the batteries; the calculated battery charge needs to be accurate enough when the battery is in use.
The other way is that a coulometer is used to judge how much electric energy is consumed by the battery through the integration of the current and the voltage of the battery; however, the coulometer can accurately judge the consumed electric energy of the battery, but the existing electric energy of the battery must be known in advance to calculate the residual electric energy, and for the client, the brand of the battery used may be uncertain, so the method is limited by the fact that the total energy of the battery must be known in advance, and in addition, for low-power consumption products, the coulometer device per se can cause certain energy.
Disclosure of Invention
In view of this, the device and method for detecting the electric quantity of the intelligent door lock and the intelligent door lock provided by the embodiments of the present invention can effectively solve the battery electric quantity judgment error caused by the difference of batteries of different manufacturers, and simultaneously avoid the judgment error that the high voltage of the battery actually cannot provide enough energy due to the difference of the environmental temperature.
In order to achieve the above object, the present invention provides a battery power detection device for an intelligent door lock, which is applied to an intelligent door lock, wherein the intelligent door lock comprises a battery and a motor module, and the power detection device comprises a control module; the control module is respectively electrically connected with the battery and the motor module and used for collecting the floating voltage of the battery after receiving a door lock operation instruction input by a user, connecting the motor module with the battery to control the motor module to work, detecting the current internal resistance of the battery, calculating the dropping voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module, and judging the electric quantity state of the battery by utilizing the dropping voltage and the floating voltage.
Optionally, the control module is further configured to collect the working voltage at two ends of the motor module and the current flowing through the motor module after the motor module is connected with the battery, calculate the current internal resistance of the battery according to the floating voltage, the working voltage and the current flowing through the motor module, calculate the voltage transmitted to the motor module by the battery according to the falling voltage and the floating voltage, compare the calculated voltage transmitted to the motor module with a preset working voltage threshold of the intelligent door lock, and determine the electric quantity state of the battery.
Optionally, the electric quantity detection device further includes a switch circuit, one end of the switch circuit is electrically connected to the motor module, and the other end of the switch circuit is electrically connected to the battery;
and the switching circuit is used for receiving the control instruction sent by the control module and disconnecting or connecting the motor module and the battery.
Optionally, the switching circuit comprises a relay and a relay driver circuit, wherein the relay driver circuit is configured to: controlling the relay to connect the motor module with the battery according to a connection control instruction from the control module, and controlling the relay to disconnect the motor module from the battery according to a disconnection control instruction from the control module; alternatively, the first and second electrodes may be,
the switch circuit comprises a transistor which is used for realizing the closing or opening according to a control instruction from the control module.
Optionally, the control module is further configured to determine that the battery is in a first low power state and control to send a prompt when the calculated voltage, which is transmitted to the motor module by the battery, is smaller than a preset first voltage threshold of the intelligent door lock.
Optionally, the control module is further configured to determine that the battery is in a second low power state and control disconnection between the motor module and the battery when the calculated voltage that the battery transmits to the motor module is smaller than a preset second voltage threshold of the intelligent door lock.
Optionally, the first voltage threshold of the intelligent door lock is greater than the second voltage threshold of the intelligent door lock, and the second voltage threshold of the intelligent door lock is the lowest working voltage value of the intelligent door lock.
The application also provides a method for detecting the battery power of the intelligent door lock, the method is applied to the intelligent door lock, the intelligent door lock comprises a battery and a motor module, and the method comprises the following steps: after receiving a door lock operation instruction input by a user, detecting the floating voltage of the battery and the current internal resistance of the battery; calculating to obtain the drop voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module; and judging the electric quantity state of the battery by utilizing the falling voltage and the floating voltage.
Optionally, the detecting the current internal resistance of the battery includes: after receiving a door lock operation instruction input by a user, controlling the motor module to be communicated with the battery, collecting working voltages at two ends of the motor module and current flowing through the motor module, and calculating the current internal resistance of the battery according to the floating voltage, the working voltages and the current flowing through the motor module; utilize fall voltage and superficial voltage to judge the electric quantity state of battery includes: and calculating the voltage transmitted to the motor module by the battery according to the drop voltage and the floating voltage, comparing the calculated voltage transmitted to the motor module by the battery with a preset working voltage threshold value of the intelligent door lock, and determining the electric quantity state of the battery.
The application also provides an intelligent door lock, intelligent door lock includes as above electric quantity detection device, and with electric quantity detection device electric connection's battery and motor module.
According to the device and the method for detecting the electric quantity of the intelligent door lock and the intelligent door lock, after a door lock operation instruction input by a user is received, the floating voltage and the falling voltage are detected in real time, and the electric quantity of the battery is judged according to the floating voltage and the falling voltage detected in real time, so that when the user needs to operate the door lock (such as opening or closing the door), the current actual electric quantity of the battery of the door lock can be detected, instead of directly judging the electric quantity of the battery according to the voltage of the battery, the problem of judgment error of the electric quantity of the battery caused by the difference of the batteries of different manufacturers can be effectively solved, meanwhile, the judgment error that the high voltage of the battery cannot provide enough energy due to the difference of the environmental temperature is avoided, the detection accuracy of the residual electric quantity of the battery is improved, and the user experience is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic circuit diagram of an electrical quantity detection device according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of an electrical quantity detection module according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of an electrical quantity detection module according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a method for detecting battery power of an intelligent door lock according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an intelligent door lock according to an embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
It should be noted that the terms first, second and the like in the description and in the claims, and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
As shown in fig. 1, the present application provides an intelligent door lock battery power detection device, which is applied to an intelligent door lock, the intelligent door lock includes a battery and a motor module, the power detection device includes a control module, and the control module may be a Micro Control Unit (MCU). The battery, the electric quantity detection module and the motor module are electrically connected with each other, and the control module in the battery detection module acquires parameters of the battery and the motor module by sending and receiving signals and controls the motor module to work or stop working.
The battery is used for supplying power to the motor module so that the motor works to realize the opening and closing of the intelligent door lock. In this embodiment, the battery is a household battery. In other embodiments, the battery may be a rechargeable battery, or other components that can provide power.
As shown in fig. 2, the control module is electrically connected to the battery and the motor module, and is configured to collect the float voltage of the battery after receiving a door lock operation instruction input by a user, and connect the motor module with the battery to control the motor module to operate.
As shown in fig. 3, in an optional embodiment, the electric quantity detection device further includes a switch circuit, one end of the switch circuit is electrically connected to the motor module, and the other end of the switch circuit is electrically connected to the battery; the switch circuit is used for receiving a control instruction sent by the control module and disconnecting or connecting the motor module and the battery.
The switching circuit includes a relay and a relay drive circuit, wherein the relay drive circuit is configured to: controlling the relay to connect the motor module with the battery according to a connection control instruction from the control module, and controlling the relay to disconnect the motor module from the battery according to a disconnection control instruction from the control module; or the switch circuit comprises a transistor, and the transistor is used for realizing the closing or opening according to a control instruction from the control module.
Specifically, in a state that the battery is in low power consumption, the current consumption of the battery is less than 50uA, and at this time, the battery voltage measured by the control module for the battery is a floating voltage.
The control module is used for detecting the current internal resistance of the battery, calculating the drop voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module, and judging the electric quantity state of the battery by utilizing the drop voltage and the floating voltage.
The electric quantity state of the battery of the intelligent door lock is under different environmental temperatures, and the detection result difference is very large due to large internal resistance change, so that the current accurate electric quantity state data of the battery can be obtained only by real-time detection when the intelligent door lock is used. In this embodiment, each time the intelligent door lock receives a door lock operation instruction from a user, the current internal resistance of the battery needs to be determined.
Specifically, in this embodiment, the control module collects the working voltage across the motor module and the current flowing through the motor module after the motor module is connected to the battery, and calculates the current internal resistance of the battery according to the floating voltage, the voltage and the current flowing through the motor module. When the control module is connected with the motor module and the battery, the current flowing through the motor module can carry out load on the battery, and at the moment, the floating voltage, the voltage and the current flowing through the motor module have the following relations: u1 ═ I × R + U2, where U1 is the float voltage, I is the current flowing through the motor module, U2 is the operating voltage across the motor module when the motor module and battery are currently switched on, and R is the current internal resistance of the battery, so that the current internal resistance R ═ I (U1-U2)/I can be determined.
In the present embodiment, since the maximum operating current of the motor module and the current internal resistance of the battery calculated in real time are known, the drop voltage can be calculated by Δ U — Imax R, where Imax is the maximum operating current of the motor module and R is the current internal resistance of the battery.
In this embodiment, when the control module determines the electric quantity state of the battery by using the drop voltage and the floating voltage, the control module may calculate the voltage that the battery is transmitted to the motor module according to the drop voltage and the floating voltage, compare the calculated voltage that the battery is transmitted to the motor module with a preset threshold of the working voltage of the intelligent door lock, and determine the electric quantity state of the battery.
Specifically, in practical application, the voltage transmitted to the motor module by the battery is obtained by making a difference between the floating voltage and the falling voltage, and then the voltage transmitted to the motor module by the battery is compared with the working voltage threshold of the intelligent door lock, so as to determine the electric quantity state of the battery, for example, whether the battery is enough to support the motor of the intelligent door lock to work or support the intelligent door lock to perform other work.
The battery is at the course of the work, along with the increase of discharge time, the electric quantity of battery can constantly reduce, and then lead to the voltage of battery also constantly to reduce, lead to the fall of battery voltage, nevertheless because the voltage influence of environmental factor to the battery, make the voltage condition through directly surveying the battery can have the unequal condition rather than real electric quantity, consequently, before rotating at every turn at the lock, need determine the voltage that the motor module was carried to the battery, can avoid the influence of environmental factor to the battery effectively like this and lead to the inaccurate condition of electric quantity testing result to take place.
In an optional implementation manner, the control module is further configured to determine that the battery is in a first low battery state and control to send a prompt when the calculated voltage, which is transmitted to the motor module by the battery, is smaller than a preset first voltage threshold of the intelligent door lock.
In an optional embodiment, the control module is further configured to determine that the battery is in a second low battery state and control disconnection between the motor module and the battery when the calculated voltage, which is transmitted to the motor module by the battery, is smaller than a preset second voltage threshold of the intelligent door lock. For example, the second voltage threshold is the lowest operating voltage of the intelligent door lock.
In this embodiment, the first voltage threshold of the smart door lock is greater than the second voltage threshold of the smart door lock.
Through the embodiment, after receiving the lock operating instruction of user input, real-time detection floats airborne voltage and drop voltage, the electric quantity of battery is judged according to real-time detection's airborne voltage and drop voltage, therefore when the user needs to operate the lock (for example, open the door or close the door), can detect the current actual electric quantity of lock battery, rather than directly judging the battery electric quantity according to battery voltage, thereby the judgment error that the difference that can effectively solve different producer batteries caused, avoid simultaneously because the difference of ambient temperature leads to the battery high voltage can't improve enough energy judgement mistake, and then the detection accuracy of battery surplus electric quantity has been improved, user experience has been improved.
As shown in fig. 4, an embodiment of the present application provides a method for detecting battery power of an intelligent door lock, where the method is applied to the intelligent door lock, and the method includes:
step S710, after receiving a door lock operation instruction input by a user, detecting the floating voltage of the battery and the current internal resistance of the battery;
step S720, calculating to obtain the dropping voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module;
and step S730, judging the electric quantity state of the battery by using the falling voltage and the floating voltage.
Specifically, in step S710, the battery is used to supply power to the motor module so that the motor works to open and close the door of the intelligent door lock. In this embodiment, the battery is a household battery. In other embodiments, the battery may be a rechargeable battery, or other components that can provide power. When the battery is in a low power consumption state, the current consumption of the battery is less than 50uA, at this time, the battery voltage measured by the battery is a floating voltage, and because the load current is very small, the influence of the internal resistance of the battery on the measured voltage can be ignored. .
In an alternative embodiment, step S710 may include the following steps: after receiving a door lock operation instruction input by a user, controlling the motor module to be communicated with the battery, collecting working voltages at two ends of the motor module and current flowing through the motor module, and calculating the current internal resistance of the battery according to the floating voltage, the voltage and the current flowing through the motor module.
After the motor module is connected with the battery, the current flowing through the motor module can pull the battery, and at the moment, the floating voltage, the working voltages at two ends of the motor module and the current flowing through the motor module have the following relations: u1 ═ I × R + U2, where U1 is the float voltage, I is the current flowing through the motor module, U2 is the operating voltage across the motor module when the motor module and battery are currently switched on, and R is the current internal resistance of the battery, so that the current internal resistance R ═ I (U1-U2)/I can be determined.
In step S720, since the maximum operating current of the motor module and the current internal resistance of the battery calculated in real time are known, the drop voltage can be calculated by Δ U ═ Imax × R, where Imax is the maximum operating current of the motor module, and R is the current internal resistance of the battery.
In an alternative embodiment, step S730 may include the following steps: and calculating the voltage transmitted to the motor module by the battery according to the drop voltage and the floating voltage, comparing the calculated voltage transmitted to the motor module by the battery with a preset working voltage threshold value of the intelligent door lock, and determining the electric quantity state of the battery.
The battery is at the course of the work, along with the increase of discharge time, the electric quantity of battery can constantly reduce, and then lead to the voltage of battery also constantly to reduce, lead to the fall of battery voltage, nevertheless because the voltage influence of environmental factor to the battery for the voltage condition through directly surveying the battery can have the unequal condition rather than real electric quantity, consequently, through before the lock rotates at every turn, need determine the voltage that the motor module was carried to the battery, can avoid environmental factor to lead to the inaccurate condition of electric quantity testing result to take place like this effectively.
In an optional implementation manner, when the calculated voltage transmitted by the battery to the motor module is smaller than a preset first voltage threshold of the intelligent door lock, it is determined that the battery is in a first low-battery state, and a prompt is controlled to be sent.
In an optional implementation manner, when the calculated voltage transmitted by the battery to the motor module is smaller than a preset second voltage threshold of the intelligent door lock, it is determined that the battery is in a second low-battery state, and the connection between the motor module and the battery is controlled to be disconnected. For example, the second voltage threshold is the lowest operating voltage of the intelligent door lock.
In this embodiment, the first voltage threshold of the smart door lock is greater than the second voltage threshold of the smart door lock.
Through the embodiment, after receiving the door lock operating instruction of user input, real-time detection floats airborne voltage and drop voltage, the electric quantity of battery is judged according to real-time detection's airborne voltage and drop voltage, therefore when the user needs to operate the door lock (for example, open the door or close the door), can detect the current actual electric quantity of door lock battery, rather than directly judging the battery electric quantity according to battery voltage, thereby can effectively solve the problem of the judgement error that the difference of different producer batteries caused, avoid simultaneously because the difference of ambient temperature leads to the battery high voltage actually but can't provide enough energy judgement mistake, and then improved the detection accuracy of battery residual capacity, user experience has been improved.
Fig. 5 provides an intelligent door lock according to an embodiment of the present application, where the intelligent door lock includes the above power detection device, and a battery and a motor module electrically connected to the power detection device. The battery and the motor module in this embodiment may be the battery and the motor module in the above embodiments, and are not described herein.
Through the embodiment, the judgment error caused by the difference of the batteries of different manufacturers can be effectively solved, the judgment error that the high voltage of the battery cannot actually provide enough energy due to the difference of the environmental temperature is avoided, the detection accuracy of the residual electric quantity of the battery is improved, and the user experience is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
The corresponding technical features in the above embodiments may be used with each other without causing contradiction in the schemes or without being implementable.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The battery electric quantity detection device for the intelligent door lock is characterized by being applied to the intelligent door lock, wherein the intelligent door lock comprises a battery and a motor module, and the electric quantity detection device comprises a control module;
the control module is respectively electrically connected with the battery and the motor module and used for collecting the floating voltage of the battery after receiving a door lock operation instruction input by a user, connecting the motor module with the battery to control the motor module to work, detecting the current internal resistance of the battery, calculating the dropping voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module, and judging the electric quantity state of the battery by using the dropping voltage and the floating voltage, wherein the step of judging the electric quantity state of the battery by using the dropping voltage and the floating voltage is that the voltage transmitted to the motor module by the battery is calculated according to the difference between the dropping voltage and the floating voltage, and the calculated voltage transmitted to the motor module by the battery is compared with a preset intelligent door lock working voltage threshold value, determining a state of charge of the battery.
2. The apparatus of claim 1, wherein the control module is further configured to collect an operating voltage across the motor module and a current flowing through the motor module after the motor module is connected to the battery, and calculate the present internal resistance of the battery according to the float voltage, the operating voltage, and the current flowing through the motor module.
3. The device of claim 1, wherein the power detection device further comprises a switch circuit, one end of the switch circuit is electrically connected to the motor module, and the other end of the switch circuit is electrically connected to the battery;
and the switching circuit is used for receiving the control instruction sent by the control module and disconnecting or connecting the motor module and the battery.
4. The apparatus of claim 3, wherein the switching circuit comprises a relay and a relay driver circuit, wherein the relay driver circuit is configured to: controlling the relay to connect the motor module with the battery according to a connection control instruction from the control module, and controlling the relay to disconnect the motor module from the battery according to a disconnection control instruction from the control module; alternatively, the first and second electrodes may be,
the switch circuit comprises a transistor which is used for realizing the closing or opening according to a control instruction from the control module.
5. The device of claim 2, wherein the control module is further configured to determine that the battery is in a first low battery state and control to send out a prompt when the calculated voltage, which is transmitted to the motor module by the battery, is less than a preset first voltage threshold of the smart door lock.
6. The device of claim 5, wherein the control module is further configured to determine that the battery is in a second low battery state and control the motor module to disconnect from the battery when the calculated voltage delivered by the battery to the motor module is less than a preset second voltage threshold of the smart door lock.
7. The apparatus of claim 6, wherein the smart door lock first voltage threshold is greater than the smart door lock second voltage threshold, and wherein the smart door lock second voltage threshold is a lowest operating voltage value of the smart door lock.
8. The method for detecting the battery power of the intelligent door lock is characterized by being applied to the intelligent door lock, wherein the intelligent door lock comprises a battery and a motor module, and the method comprises the following steps:
after receiving a door lock operation instruction input by a user, detecting the floating voltage of the battery and the current internal resistance of the battery;
calculating to obtain the drop voltage of the battery according to the current internal resistance of the battery and the maximum working current of the motor module;
the method comprises the steps of utilizing the drop voltage and the floating voltage to judge the electric quantity state of a battery, wherein the drop voltage and the floating voltage are utilized to judge the electric quantity state of the battery, the battery is conveyed to the voltage of a motor module according to the drop voltage and the floating voltage, the calculated voltage of the motor module is compared with a preset intelligent door lock working voltage threshold value, and the electric quantity state of the battery is determined.
9. The method of claim 8,
the detecting the current internal resistance of the battery includes:
after receiving a door lock operation instruction input by a user, controlling the motor module to be communicated with the battery, collecting working voltages at two ends of the motor module and current flowing through the motor module, and calculating the current internal resistance of the battery according to the floating voltage, the working voltages and the current flowing through the motor module.
10. An intelligent door lock, characterized in that, the intelligent door lock comprises the electric quantity detection device as claimed in claims 1-7 and a battery and motor module electrically connected with the electric quantity detection device.
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| CN201911213087.XA CN110907842B (en) | 2019-12-02 | 2019-12-02 | Intelligent door lock electric quantity detection device and method and intelligent door lock |
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| CN201911213087.XA CN110907842B (en) | 2019-12-02 | 2019-12-02 | Intelligent door lock electric quantity detection device and method and intelligent door lock |
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| CN114089197A (en) * | 2021-11-11 | 2022-02-25 | 珠海格力电器股份有限公司 | Door lock monitoring method and device, electronic equipment and storage medium |
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