KR20210049354A - Rechargeable Battery Device for digital doorlock - Google Patents

Abstract

The present invention relates to a battery device for a digital door lock which supplies power to the digital door lock having an operating power supply unit. The battery device for a digital door lock comprises: a first battery unit having a rechargeable first secondary battery cell and connected to an operating power supply unit of a digital door lock to supply power; and a second battery unit having a rechargeable second secondary battery cell and detachably coupled to the first battery unit to supply the power to the first battery unit, wherein the second battery unit is separated from the first battery unit to be charged, and the second battery unit is formed to have a charging capacity larger than a charging capacity of the first battery unit.

Description

Rechargeable Battery Device for digital doorlock

The present invention relates to a battery device for a digital door lock, and more particularly, a first battery part and a second battery part made of a rechargeable secondary battery, and even when one of them is discharged and needs to be charged or replaced, the digital door lock It relates to a battery device for a digital door lock that enables use.

In addition, the present invention relates to a battery device for a digital door lock capable of responding to an increase in power capacity of a battery device and reducing environmental problems caused by the use of non-rechargeable disposable batteries.

Door locks are installed and used on doors to restrict unauthorized outsiders from entering places where family members or many people live or do activities (apartments, detached houses, officetels, buildings, etc.). The door lock includes a method of opening and closing by a key, a method of opening and closing by a dial, as well as a method of a digital door lock combining mechanical and electronic technologies.

Among them, digital door locks are increasingly used as they can overcome disadvantages such as the user's inconvenience caused by the possession of a key and the possibility of a crime caused by theft and duplication of the key by a third party when using the existing mechanical door lock.

There are various types of digital door locks, such as a password input method through a key input unit, a magnetic card method with a magnetic strip, a radio frequency (RF) card method, and an integrated circuit (IC) card method. Typically, the digital door lock is formed on a door, and a driving unit that moves the dead bolt toward or retracts from the bracket by an electric signal, a control unit that controls the driving unit according to a door open/close command, and supplies operating power to the control unit and the driving unit It is formed on the operating power supply unit and the door frame, and includes a bracket, etc. into which the dead bolt is drawn out and inserted from the main body.

1 shows an operation power supply of a conventional digital door lock.

In the conventional digital door lock 100, referring to FIG. 1, a disposable battery is mainly used for the power supply unit 102. Since the conventional digital door lock 100 uses a disposable battery that cannot be recharged as an independent power source, there is an inconvenience of periodically replacing the disposable battery according to the consumption time of the disposable battery. In particular, digital door locks installed in hotels, inns, lockers, storage boxes, etc. have a problem in that maintenance costs such as labor and maintenance costs increase because disposable batteries must be frequently replaced due to high frequency of use. In addition, since an alkaline battery that can cause environmental problems is used as a disposable battery, a separate cost is required for the recovery of the waste battery.

On the other hand, in recent years, the development of remote control technology for digital door locks is becoming more active. For example, if there is a visitor in the home, the owner of the house remotely unlocks the digital door lock through his/her smart phone registered in the digital door lock so that the visitor can enter the house remotely. A technology for controlling the opening and closing of the door is being developed. On the other hand, technologies for recognizing users by introducing biometrics such as fingerprint recognition and facial recognition to digital door locks are also being introduced.

According to this new trend, an increase in the power capacity of the digital door lock is required. Disposable batteries have a relatively small power capacity, and thus, products in which a larger number of batteries are installed to respond to this trend are also being introduced in the digital door lock operating power supply unit. Therefore, the digital door lock needs to solve the problem of increasing power capacity in response to a new trend.

Korean Intellectual Property Office Registration Patent No. 10-1492963 (February 13, 2015) Korean Intellectual Property Office Registration Patent No. 10-1966600 (April 5, 2019)

The present invention includes a first battery unit and a second battery unit comprising a rechargeable secondary battery, and enables continuous use of a digital door lock even when any one battery is separated for charging or a battery replacement is required. It is an object to provide a battery device for a digital door lock.

In addition, an object of the present invention is to provide a battery device for a digital door lock capable of responding to an increase in power supply capacity.

In addition, an object of the present invention is to provide a battery device for a digital door lock capable of solving the environmental problem caused by the use of non-rechargeable disposable batteries.

A battery device for a digital door lock according to the present invention for achieving the above object is a battery device for a digital door lock that supplies power to a digital door lock having an operation power supply, and has a rechargeable first secondary battery cell, A second battery comprising a first battery unit connected to an operating power supply to supply power and a second rechargeable secondary battery cell, and is detachably coupled to the first battery unit to supply power to the first battery unit And a part, wherein the second battery part is charged separately from the first battery part, and the second battery part is formed to have a larger charging capacity than the first battery part.

In addition, the discharge voltage of the second secondary battery cell gradually or stepwise decreases as the use time of the first battery part and the second battery part increases, or the cell voltage of the first secondary battery cell and the second secondary battery cell It may be configured to detect and generate a charging notification signal when charging is necessary.

In addition, the first battery part and the second battery part are located outside the digital door lock, and the first battery part may be electrically connected to an operation power supply of the digital door lock by a connection cable.

In addition, the first battery part and the second battery part may be located inside the digital door lock.

In addition, the first battery part may be located inside the digital door lock, the second battery part may be located outside the digital door lock, and the first battery part and the second battery part may be connected by a connection cable.

In addition, the second battery unit and the first battery unit may be formed to selectively supply power to the operating power supply unit.

In addition, the connection cable may be formed of a flexible cable.

In addition, the first battery unit and the second battery unit may be connected through a USB terminal.

The battery device for a digital door lock according to the present invention includes a first battery part and a second battery part made of a rechargeable secondary battery, so even when any one battery is separated for charging or a battery replacement is required, the digital door lock is continuously operated. You can make it possible to use it.

In addition, since the first battery and the second battery are formed of secondary batteries having a relatively large power capacity, the battery device for a digital door lock according to the present invention can easily respond to an increase in power supply capacity.

In addition, since the battery device for digital door lock of the present invention uses a rechargeable secondary battery, environmental problems caused by the use of disposable batteries can be reduced.

1 is a perspective view of an operation power supply unit in a conventional digital door lock.
2 is a photograph of a control type of a digital door lock by a smartphone and an example of using a fingerprint recognition type digital door lock.
3 is a front view and a partial exploded perspective view of a battery device for a digital door lock according to an embodiment of the present invention.
4 is an exploded perspective view of a first battery unit and a second battery unit constituting a battery device for a digital door lock according to an embodiment of the present invention.
5 is a block diagram of a second circuit board constituting a battery device for a digital door lock according to an embodiment of the present invention.
6 to 8 are schematic circuit diagrams illustrating an electrical connection state between the digital door lock battery device and the digital door lock according to an embodiment of the present invention.
9 is a perspective view showing a combined state of a battery device for a digital door lock and a digital door lock according to an embodiment of the present invention.
10 is a graph showing discharge characteristics of a battery device for a digital door lock according to the prior art and according to an embodiment of the present invention.
11 and 12 are graphs showing operating characteristics of a boosting and discharging circuit according to an embodiment of the present invention.
13 is a partial exploded perspective view of a battery device for a digital door lock and a digital door lock according to another embodiment of the present invention.
14 is a partial exploded perspective view of a battery device for a digital door lock and a digital door lock according to another embodiment of the present invention.

Hereinafter, the configuration and operation of the battery device for a digital door lock of the present invention will be described in detail with reference to the accompanying drawings.

3 is a front view and a partial exploded perspective view of a battery device for a digital door lock according to an embodiment of the present invention. 4 is an exploded perspective view of a first battery unit and a second battery unit constituting a battery device for a digital door lock according to an embodiment of the present invention. 5 is a block diagram of a second circuit board constituting a battery device for a digital door lock according to an embodiment of the present invention. 6 to 8 are schematic circuit diagrams illustrating an electrical connection state between the digital door lock battery device and the digital door lock according to an embodiment of the present invention. 9 is a perspective view showing a combined state of a battery device for a digital door lock and a digital door lock according to an embodiment of the present invention.

(A) of FIG. 3 shows a state in which the first battery unit 210 and the second battery unit 230 are combined, and (b) the second battery unit 230 is separated from the first battery unit 210 It is a perspective view of the state. Referring to FIG. 3, a battery device 200 for a digital door lock according to an embodiment of the present invention includes a first battery unit 210 and a second battery unit 230. In the digital door lock battery device, as shown in FIG. 3, the first battery unit 210 and the second battery unit 230 are formed separately from the digital door lock 100 and are electrically connected to the digital door lock 100. Can be used in combination. In this case, the digital door lock battery device 200 may include a connection cable 250.

In addition, referring to FIGS. 4 and 6 to 9 along with FIG. 3, the first battery unit 210 and the second battery unit 230 include a first binding means 212c and a second binding means 232c. It can be mechanically bonded or separated from each other by means of. In addition, the first battery unit 210 and the second battery unit 230 may be mechanically coupled and electrically connected to each other.

The first battery unit 210 may include a first secondary battery cell 216 and a first circuit board 222. In addition, the second battery unit 230 may include a second secondary battery cell 236 and a second circuit board 242. The first secondary battery cell 216 and the second secondary battery cell 236 may be formed of a secondary battery capable of charging and discharging. The secondary battery may be formed of a battery such as a lithium secondary battery. The first secondary battery cell 216 and the second secondary battery cell 236 may supply charged power to a digital door lock.

When the first battery unit 210 and the second battery unit 230 are combined, the first secondary battery cell 216 of the first battery unit 210 is a second secondary battery unit of the second battery unit 230. It is charged while being electrically connected to the battery cell 236.

Meanwhile, after the second battery unit 230 is separated from the first battery unit 210, it may be charged by being coupled to a separate charging device (not shown). For example, the charging device may be a charging device for a smartphone.

The charging capacity of the second secondary battery cell 236 of the second battery unit 230 may preferably be greater than the charging capacity of the first secondary battery cell 216 of the first battery unit 210. Accordingly, the first secondary battery cell 216 of the first battery unit 210 can be smoothly charged by the second battery unit 230.

The first battery unit 210 may include a first charge/discharge terminal 220. The first charge/discharge terminal 220 may be indicated as “D11, D12” and “C11, C12” on the first circuit board 216, referring to FIG. 6. The first charge/discharge terminal 220 ) May be formed as a USB terminal The first charging/discharging terminal may be formed as a USB male terminal or a USB female terminal The first charging/discharging terminal 220 is a first battery It may be installed to protrude to the outside of the part 210. In addition, the first charge/discharge terminal 220 may be located inside the first battery part 210. In addition, the first charge/discharge terminal ( 220) may be formed of a 5-pin terminal or a C-type terminal generally used for a charging terminal of a smartphone.

The connection cable 250 may be formed to extend outside the battery device 200 for a digital door lock. More specifically, one side of the connection cable is connected to the first circuit board 222 of the first battery unit 210 inside the battery device 200 for digital door lock, and the other side is the battery device 200 for digital door lock. It may be formed to extend outward of. Accordingly, the connection cable 250 can be electrically connected to the digital door lock battery device 200 with the operation power supply unit 102 of the digital door lock 100. That is, one side of the connection cable 250 may be electrically connected to the first battery unit 210 and the other side may be electrically connected to the operating power supply unit 102 of the digital door lock 100. The connection cable 250 may be formed of a flexible cable or a flexible substrate. The connection cable 250 may have a connection terminal in the form of an alligator clip or a model battery at an end thereof. The connection cable 250 may be connected to the operating power supply unit 102 through a groove or a gap of the digital door lock 100.

The second battery unit 230 may include a second charge/discharge terminal 240. The second charge/discharge terminal 240 may be displayed as “D21, D22” and “C21, C22” on the second circuit board 236, referring to FIG. 6. The second charge/discharge terminal 240 ) May be formed as a USB terminal The second charging/discharging terminal 240 may be formed as a USB male terminal or a USB female terminal. It may be formed in a form coupled to the first charge/discharge terminal 220. For example, when the first charge/discharge terminal is formed as a USB male terminal, the second charge/discharge terminal 220 is a USB female terminal The second charge/discharge terminal 240 may be located inside the second battery unit 230. The second charge/discharge terminal 220 is outside the second battery unit 230 In addition, the second charge/discharge terminal 240 may be formed of a 5-pin terminal or a C-type terminal generally used for a charging terminal of a smartphone.

4A is an exploded perspective view of the first battery unit 210 and the second battery unit 230, and FIG. 4B is a view of the first battery unit 210 and the second battery unit 230. It is an exploded perspective view of each.

Referring to FIG. 4, the first battery unit 210 may include a first case 212. The first case 212 may include a first case body 212a and a first case cover 212b. The first case body 212a may form a first accommodation space 214 for accommodating the first secondary battery cell 216. The first case cover 212b may cover the first case body 212a to shield the first accommodation space 214.

The first case 212 includes a first case body 212a in which a first accommodation space 214 for accommodating a first secondary battery cell 216 is formed, and a first case body 212a for covering the first case body 212a. Includes 1 case cover 212b. A first secondary battery cell 216 and a first circuit board 222 are accommodated in the first accommodation space 214. A first charge/discharge terminal 220 is installed above the outside of the first accommodation space 214. Meanwhile, although not specifically shown, the first case 212 may be provided with a charging notification audio output unit and an LED remaining amount display unit.

The first case 212 may be provided with a fixing means for fixing the battery device for digital door lock to the door at the rear side. Although not specifically shown, the fixing means may be formed of an adhesive layer, a magnetic film, or a Velcro tape. The fixing means may be formed in a predetermined area on the rear surface of the first case 212. In addition, when the fixing means is formed of an adhesive layer, a release film for protecting the adhesive layer may be attached to the surface of the adhesive layer. In addition, when attaching the digital door lock battery device to the door, the release film is removed and then attached to a suitable position on the door.

Referring to FIG. 4, the second battery unit 230 may include a second case 232. The second case 232 may include a second case body 232a and a second case cover 232b. The second case body 232a may form a second accommodation space 234 for accommodating the second secondary battery cell 236. The second case cover 232b may cover the second case body 232a to shield the second accommodation space 234. A second secondary battery cell 236 and a second circuit board 242 are accommodated in the second accommodation space 234. A second charging/discharging terminal 240 is installed below the outside of the second accommodation space 234. Meanwhile, although not specifically shown, the second case 232 may be provided with a charging notification audio output unit and an LED remaining amount display unit.

The first binding means 212c and the second binding means 232c, although not specifically shown, are implemented in the form of insertion grooves and insertion protrusions respectively formed in the first case 212 and the second case 232 Can be. At this time, the first binding means 212c and the second binding means 232c are formed on one surface of the first case 212 and the other surface of the second case 232, respectively. 2 When the battery unit 230 is in contact, they may be coupled to each other. However, the first binding means 212c and the second binding means 232c are not limited thereto, and may be formed in various shapes and structures capable of coupling the first case 212 and the second case 232. . Meanwhile, when the first charging terminal 220 and the second charging terminal 240 are formed as USB terminals and are coupled to each other, the first battery unit 210 and the second battery unit 230 are formed by the coupling force of the USB terminals. Can be combined. Therefore, in this case, the first binding means 212c and the second binding means 232c may be omitted.

5 is a block diagram of a first circuit board and a second circuit board constituting a battery device for a digital door lock according to an embodiment of the present invention.

5, the second circuit board 242 includes a second charging circuit part 242a for controlling charging of the second secondary battery cell 236, and a second charging circuit part 242a for protecting the second secondary battery cell 236. A protection circuit part 242b, a second booster circuit part 232c for boosting, a second discharge circuit part 242d for discharging control, and a second charge detection part 242e, and a second charge/discharge terminal 240 Can be electrically connected. The second charging status detection unit 242e may determine whether charging is necessary by sensing a cell voltage (or a discharge voltage) of the second secondary battery cell 236. When it is determined that charging is necessary, the second charging detection unit 242e may generate a charging signal and transmit a charging notification audio output unit and an LED remaining amount display unit formed in the second case 232.

The first signal terminals S1 and S2 may be formed together with the first charge/discharge terminal 220. That is, when the first charge/discharge terminal 220 is formed as a USB terminal, the first signal terminals S1 and S2 may also be formed on the USB terminal. In addition, the first signal terminals S1 and S2 may be separated from the first charging/discharging terminal 220 and formed as separate terminals.

Meanwhile, referring to FIG. 5, the first circuit board 222 may be formed similar to the configuration of the second circuit board 242. That is, the first circuit board 222 includes a first charging circuit part 222a, a first protection circuit part 222b for protecting the first secondary battery cell 216, a first boosting circuit part 222c for boosting, A first discharge circuit part 222d for discharge control may be included. In addition, the first circuit board 222 may further include a first charging detection unit 222e. The first circuit board 222 may be electrically connected to the first charge/discharge terminal 220. The first charging detection unit 222e may determine whether charging is necessary by sensing a cell voltage of the first secondary battery cell 216. When it is determined that charging is necessary, the first charging detection unit 222e may generate a charging signal and transmit a charging notification audio output unit and an LED remaining amount display unit formed in the first case 212. However, since the first secondary battery cell 216 is charged by the voltage supplied from the second secondary battery cell 236, the second secondary battery cell 236 does not need to be charged. Whether or not charging is necessary may be prioritized. Accordingly, the first charging detection unit 222e may not be formed on the first circuit board 222. The description of the specific configuration of the first circuit board 222 may be duplicated with the description of the second circuit board 242 and will be omitted. However, the first circuit board 222 may further include a switching unit 222f or an operation diode 222g shown in FIGS. 7 and 8. When the first battery unit 210 and the second battery unit 230 are coupled, the switching unit 222f connects the first charge/discharge terminal 220 to the discharge circuit of the first secondary battery cell 216 or the second It can be connected by changing to a discharge circuit of the secondary battery cell 236. Meanwhile, when the second battery unit 230 is separated from the first battery unit 210, the first charge/discharge terminal 220 may be connected to the discharge circuit of the first secondary battery cell 216.

6 to 8 are schematic circuit diagrams illustrating an electrical connection state between the digital door lock battery device and the digital door lock according to an embodiment of the present invention.

3 and 6, the first secondary battery cell 216 of the first battery unit 210 is connected to the operating power supply unit 102 of the digital door lock 100 through a connection cable 250 to supply power. Can supply. In addition, the second secondary battery cell 236 of the second battery unit 230 may serve as a power source for charging the first secondary battery cell 216 of the first battery unit 210.

In addition, referring to FIG. 7, the first secondary battery cell 216 of the first battery part 210 and the second secondary battery cell 236 of the second battery part 230 depend on the action of the switch 222f. As a result, it is selectively connected to the operation power supply unit 102 of the digital door lock 100 to supply power. At this time, the second secondary battery cell 236 of the second battery unit 230 serves as an operating power source for the digital door lock 100 and at the same time, the first secondary battery cell 216 of the first battery unit 210 is It can serve as a charging power source.

In addition, referring to FIG. 8, the first secondary battery cell 216 of the first battery part 210 and the second secondary battery cell 236 of the second battery part 230 are connected to the operation diode 222g. It may be selectively connected to the power supply unit 102 of the digital door lock 100 through a cable 250. For example, when the cell voltage of the second secondary battery cell 236 is greater than or equal to the set value of the operating power supply unit, the power of the second secondary battery cell 236 is supplied to the operating power supply unit 102, and the second secondary battery cell When the cell voltage of 236 falls below the set value, power of the first secondary battery cell 216 may be supplied to the operation power supply unit 102 by the action of the operation diode 222g. The operating diode 222g may be a Schottky diode.

The first circuit board 222 may further include first signal terminals S1 and S2 capable of providing a voltage value of the first secondary battery cell 216 to the digital door lock 100. The first signal terminals S1 and S2 may be formed together with the connection cable 250. That is, when the connection cable is formed as a flexible cable, it may be formed as a separate line and a terminal on the flexible cable. In addition, the first signal terminals S1 and S2 may be formed separately from the connection cable 250. The digital door lock 100 may detect the cell voltage of the first secondary battery cell 216 provided through the first signal terminals S1 and S2 through a sensing unit, and notify whether charging is necessary through a built-in voice unit. In addition, the digital door lock 100 can detect the cell voltage of the second secondary battery cell 236 provided through the first signal terminals S1 and S2 through the sensing unit, and notify whether charging is necessary through the built-in voice unit. have.

In addition, the first circuit board 222 and the second circuit board 242 further include second signal terminals S1 and S2 electrically connected to each other to transmit and receive signals, referring to FIGS. 6 to 8. can do. That is, the second signal terminals S1 and S2 are formed on the first circuit board 222 and the second circuit board 242, respectively, and are electrically connected to each other to transmit/receive necessary signals. The second signal terminals S1 and S2 may be formed together on the first charge/discharge terminal 220 and the second charge/discharge terminal 240, respectively. For example, when the first charge/discharge terminal 220 and the second charge/discharge terminal 240 are formed of a USB terminal, a 5-pin terminal, or a C-type terminal, the second signal terminals S1 and S2 are USB terminals. , May be formed together on a 5-pin terminal or a C-type terminal. In addition, the second signal terminals S1 and S2 may be formed separately from the first charge/discharge terminal 220 and the second charge/discharge terminal 240.

In addition, referring to FIGS. 7 and 8, the digital door lock 100 determines whether the first battery unit 210 or the second battery unit 230 needs to be charged through the first signal terminals S1 and S2. It is possible to determine that a charging signal or a notification signal is generated through the built-in voice unit to indicate that charging is required. The lithium secondary battery constituting the first battery unit 210 and the second battery unit 230 is formed by adding a circuit module with protection, boosting, and charging/discharging circuits to the secondary battery cell. The circuit module may be formed by adding an IC having functions such as protection, boosting, charging and discharging, and additional components. Each of the ICs may be provided with a sensing unit that measures a cell voltage of a secondary battery cell.

According to the remaining amount of the first secondary battery cell 216 and the second secondary battery cell 236 of the first battery unit 210 and the second battery unit 230, a battery using the voice part of the digital door lock body 104 is used. It can be formed to proceed with the replacement notification. In this case, the first battery unit 210 and the second battery unit 230 each receive the cell voltages of the first secondary battery cell 216 and the second secondary battery cell 236 through a signal terminal. 100) by sending it to the control unit (not shown) and controlling the control body 104 to output a charging notification signal through the voice unit. The system can be used.

Hereinafter, the operation of the battery device 200 for a digital door lock according to the present invention will be described with reference to FIGS. 3 to 8.

The battery device 200 for a digital door lock of the present invention is attached to a door adjacent to the digital door lock 100 and may be electrically connected to the operating power supply unit 102 of the digital door lock 100 through a connection cable 250. The digital door lock battery device 200 is connected to the operation power supply unit 102 of the digital door lock 100 and is connected to the first secondary battery cell 216 of the first battery unit 210 or the second battery unit 230. 2 The operation power is supplied from the secondary battery cell 236 to the operation power supply unit 102 of the digital door lock 100. Preferably, the digital door lock battery device 200 may supply power from the first secondary battery cell 216 of the first battery unit 210 to the operation power supply unit 102 of the digital door lock 100. In addition, the digital door lock battery device 200 turns on the power of the second secondary battery cell 236 of the second battery unit 230 in case of abnormal operation or discharge of the first battery unit 210. 100) can be supplied to the power supply unit 102.

In addition, the second battery unit 230 is electrically connected to the first battery unit 210, and the power charged in the second secondary battery cell 236 of the second battery unit 230 is supplied to the first battery unit ( It may be supplied to the first secondary battery cell 216 of 210). The first battery unit 210 is a first secondary battery by power of the second secondary battery cell 236 supplied through the first charging/discharging terminal 220 by the operation of the built-in first circuit board 222. The cell 216 is charged.

9 is a perspective view showing a combined state of a battery device for a digital door lock and a digital door lock according to an embodiment of the present invention. As shown in (a) of FIG. 9, the connection cable 250 of the battery device 200 for the digital door lock may be fixed to and connected to the digital door lock 100 by an alligator clip. In addition, as shown in (b) of FIG. 9, the connection cable 250 of the battery device 200 for the digital door lock may be fixed to and connected to the digital door lock 100 by a connection terminal in the form of a model battery.

10 is a graph showing discharge characteristics of a battery device for a digital door lock according to the prior art and according to an embodiment of the present invention. More specifically, (a) of FIG. 10 is a graph showing the discharge characteristics of a disposable battery, (b) is a graph showing the discharge characteristics of a secondary battery (lithium ion battery), and (c) is a voltage boosting and This is a graph showing discharge characteristics by constant voltage.

In general, digital door locks do not operate normally when the installed battery is exhausted and stop, resulting in a serious problem that no person can enter or exit. Therefore, in order to prevent such a problem, a conventional digital door lock measures the voltage of the battery every time it is opened and closed to calculate the remaining amount of the battery. In addition, the digital door lock may generate a notification signal for battery replacement to a user by outputting audio such as a melody from an audio unit when the remaining voltage of the battery falls below a set voltage.

The battery device of a general digital door lock has an operating voltage of 6V and can be formed by connecting four 1.5V batteries in series. Referring to FIG. 10A, a graph of a discharge voltage according to a usage time of a disposable battery used in a conventional digital door lock is shown. The battery device of the conventional digital door lock starts at 1.5V and the discharge voltage gradually decreases as the usage time increases. As described above, in the battery device of the conventional digital door lock, the initial voltage at which four batteries are connected in series starts at 6V and gradually decreases. Whenever the digital door lock is opened or closed, the sensing unit measures the discharge voltage of the battery, and when the discharge voltage reaches a set voltage (usually 4.5V to 5V), the voice unit may output a replacement notification signal (usually a melody).

In addition, referring to (b) and (c) of FIG. 10, the relationship between the discharge voltage graph according to the usage time of the lithium secondary battery used in the digital door lock battery device 200 of the present invention and the replacement notification time point is shown. do. It can be seen that the lithium secondary battery differs from a disposable battery in a descending curve according to a discharge voltage and a use time. The lithium secondary battery requires a booster circuit that adjusts the discharge voltage to a 6V range in order to be used in the digital door lock battery device 200. In addition, the digital door lock battery device 200 needs to continuously maintain the discharge voltage of the lithium secondary battery in the 6V range and generate a charging notification signal when the discharge voltage falls below a predetermined voltage.

11 and 12 are graphs showing operating characteristics of a boosting and discharging circuit according to an embodiment of the present invention. 11 shows an example of boosting the discharge voltage at a constant rate according to the cell voltage of the lithium secondary battery, and FIG. 12 shows an example of boosting the discharge voltage in a stepwise manner according to the set expected voltage.

The battery device 200 for a digital door lock according to an embodiment of the present invention, as shown in FIGS. 11 and 12, includes a first secondary battery cell 216 of the first battery unit 210 (a first battery in the drawing). Described as) The discharge voltage can be controlled in the range of 6V-5V. The digital door lock battery device 200 can control the voltage supplied from the first battery unit 210 to the operation power supply unit 102 of the digital door lock 100 in a range of 6V-5V using a separate booster circuit. have. Here, 4V of the digital door lock 100 may be set as an operation stop voltage. More specifically, the first protection circuit 222 of the first battery part 210 and the second protection circuit 242 of the second battery part 230 are the first and second booster circuit parts 222c and 242c. The cell voltage can be boosted only by a certain ratio by using.

In the case of configuring a booster circuit so that the discharge voltages of the first secondary battery cells 216 of the first battery part 210 and the second secondary battery cells 236 of the second battery part 230 are boosted by a predetermined ratio, As the usage time elapses, the discharge voltage of the first secondary battery cell 216 of the first battery unit 210 and the second secondary battery cell 236 of the second battery unit 230 gradually decreases, and at 6V. Start and descend gradually. Accordingly, when the cell voltage is lowered and the charging voltage reaches the charging voltage due to the elapse of the use time of the battery device 200 for the digital door lock, the voice unit of the digital door lock 100 is controlled to operate, and a charging notification melody is output so that the user knows the charging timing. I can. In this case, the digital door lock battery device 200 can be installed and used in the existing digital door lock because the cell voltage is lowered in the same or similar to the existing disposable battery.

The first and second booster circuit units 222c and 242c may be configured with general and various circuits used to boost the discharge voltage of the secondary battery cell.

The first circuit board 222 and the second circuit board 242 are, as shown in Fig. 12 (a), by adding a Voltage Detector IC to the first secondary battery cell of the first battery unit 210 ( 216) (shown as a first battery cell in the drawing) is sensed, and an expected voltage before the discharge voltage of the first secondary battery cell 216 of the first battery unit 210 reaches the discharge end voltage can be set. have. Further, although not specifically shown, the same configuration and operation as described above may be applied to the second secondary battery cell 236 of the second battery unit 230. In addition, the first circuit board 222 and the second circuit board 242 are the first secondary battery cells 216 of the first battery unit 210 and the second secondary battery cells of the second battery unit 230 ( When the discharge voltage of 236 reaches the expected voltage, the first and second discharge circuit units 222d and 242d may be configured such that the discharge voltage decreases stepwise with respect to the set voltage by ON/OFF of the FET and the distribution resistance.

In addition, the digital door lock battery device 200 may be preferably designed to decrease the discharge voltage in a stepwise manner when the first battery unit 210 is discharged, as shown in FIG. 12B. . More specifically, the first circuit board 222 includes a plurality of pairs of FETs and distribution resistors, as shown in FIG. 12B, and before the discharge voltage reaches the discharge end voltage, a plurality of The first and second discharging circuit units 222d and 242d may be implemented to set the expected voltage of, and descend in a multi-step step of 0.1 to 0.2 V each time the set predicted voltage is reached. Accordingly, the digital door lock battery device When the cell voltage reaches the charging voltage due to the elapse of the use time of 200, the voice unit of the digital door lock 100 is controlled to operate, and a charging notification melody is output, so that the user can know the charging timing. In this case, the digital door lock battery device 200 can be installed and used in the existing digital door lock because the cell voltage is lowered in the same or similar to the existing disposable battery. This configuration of the first circuit board 222 can be applied equally to the second circuit board 242.

The digital door lock battery device 200 may generate a replacement notification signal when the discharge voltage is lowered to 5V or less. Alternatively, the digital door lock battery device 200 supplies the voltage of the second battery unit 230 to the first battery unit 210 when the discharge voltage of the first battery unit 210 decreases to 5V or less. The first secondary battery cell 216 of the unit 210 may be charged. More specifically, the first battery unit 210 and the second battery unit 230 detect the cell voltage of the first secondary battery cell 216 and the second secondary battery cell 236 and when charging is required. A charging signal may be generated through a separate notification unit. In addition, the first battery unit 210 and the second battery unit 230 may generate a charging signal through a separate charging notification audio output unit or an LED remaining amount display unit.

The digital door lock battery device 200 may select a power source for supplying power to the operation power supply unit 102 of the digital door lock 100 by the switching unit 222f. For example, the switching unit 222f may be controlled so that the first battery unit 210 alone supplies power supplied to the operating power supply unit 102. In addition, the switching unit 222f may be controlled so that any one of the first battery unit 210 and the second battery unit 230 selectively supplies power. For example, when the first battery unit 210 detects a combination of the first battery unit 210 and the second battery unit 230, the switching unit 222f switches to the second charge/discharge terminal 240 Thus, the second battery unit 230 may supply power to the operating power supply unit 102. In this case, the first battery unit 210 may be switched so that the second battery unit 230 supplies power to the operating power unit when the discharge voltage falls below the required charging voltage as the discharge proceeds. In addition, when the discharge voltage of the second battery unit 230 is lowered, the switching unit 222f switches back to the first battery unit 210 to supply power from the first battery unit 210 to the operating power supply unit 102. I can. In this case, the first battery unit 210 and the second battery unit may be electrically connected in parallel.

The charging notification circuit unit of the second circuit board 242 outputs a charging notification signal through the charging notification audio output unit and the LED remaining amount display unit when the discharge voltage of the second secondary battery cell 236 falls below the required charging voltage for charging. It is done. When the second battery unit 230 is separated from the first battery unit 210, the first secondary battery cell 216 of the first battery unit 210 is applied to the operation power supply unit 102 of the digital door lock 100. Can supply operating power. The digital door lock 100, which is supplied with power from the first secondary battery cell 216 through the first signal terminals S1 and S2, determines whether it is in a state that needs to be charged, and needs to be charged through the built-in voice unit. You can signal that it is in a state. Meanwhile, after the second battery unit 230 is separated, it is connected to a separate charging device (not shown) to charge the second secondary battery cell. The second battery unit 230 and the first battery unit 210 include a second charge/discharge terminal 240 of the second battery unit 230 and a first charge/discharge terminal 220 of the first battery unit 210 Is coupled to each other and can be electrically connected.

In the above, the battery device 200 for a digital door lock of the present invention includes a first battery unit 210 and a second battery unit 230, and the first battery unit 210 and the second battery unit 230 are While being combined, an embodiment in which the digital door lock 100 is formed to be electrically connected to the digital door lock 100 from the outside of the digital door lock 100 has been described. Here, the first battery unit 210 is a spare battery and is electrically connected to the operation power supply unit 102 of the digital door lock 100 to supply power required for the operation of the digital door lock 100. In addition, the first battery unit 210 may supply power to the operation power supply unit 102 of the digital door lock 100 even when the second battery unit 230 is separated for charging.

In addition, the second battery unit 230 may be electrically connected to the first battery unit 210 to supply power required for charging the first battery unit 210. In addition, the second battery unit 230 may supply operating power to the operation power supply unit 102 of the digital door lock 100 similarly to the first battery unit 210.

In addition, the battery device 200 for a digital door lock according to the present invention may be formed such that the first battery unit 210 and the second battery unit 230 are located inside the digital door lock 100, referring to FIG. 13. have. More specifically, in the digital door lock battery device 200, both the first battery unit 210 and the second battery unit 230 are located inside the digital door lock 100, and the second battery unit 230 May be formed to be separated from the first battery unit 210 inside the digital door lock 100. In this case, the first battery unit 210 and the second battery unit 230 may be formed to form a single shape while being detachably coupled to each other.

In addition, the first battery unit 210 and the second battery unit 230 are configured with the first battery unit 210 and the second battery unit 230 of the digital door lock battery device 200 according to FIG. 3. It can be formed identically or similarly. However, the digital door lock battery device 200 may be formed differently in appearance so that it can be accommodated in an accommodation space of the digital door lock 100. To this end, the digital door lock 100 may include an accommodation space for accommodating the first battery unit 210 and the second battery unit 230.

The first battery part 210 and the second battery part 230 are accommodated together in an accommodation space, and the second battery part 230 is separated from the first battery part 210 when necessary, and the digital door lock 100 It may leak outside of. The first battery unit 210 is fixedly coupled to the digital door lock 100 and may be formed to be separated by a digital door lock only when necessary, such as replacement of the first secondary battery cell 216 or a failure of the first battery unit. . The first charging and discharging terminals 220 of the first battery unit 210 and the second charging and discharging terminals 240 of the second battery unit 230 are each formed of a fixed contact terminal and an elastic contact terminal, so that the second battery unit The 230 may be formed to be in elastic contact with the first battery part 210 and to be easily separated. The second battery unit may be separated from the first battery unit 210 and charged by a separate charging device.

In addition, in the battery device 200 for a digital door lock according to the present invention, referring to FIG. 14, the first battery unit 210 is located inside the digital door lock 100, and the second battery unit 230 is the digital door lock ( 1000) can be formed to be located outside. The digital door lock battery device 200 may be formed so that the second battery unit 230 is located outside the digital door lock 100 and is electrically connected to the first battery unit 210 by a connection cable 250. have. In this case, the first battery unit 210 may be accommodated in an accommodation space formed inside the digital door lock 100. Accordingly, the first battery unit 210 may be formed differently in appearance to be accommodated in the door lock accommodation space of the digital door lock 100. In addition, the first battery unit 210 and the second battery unit 230 are internally configured with the first battery unit 210 and the second battery unit 230 of the digital door lock battery device 200 according to FIG. 3. These can be formed identically or similarly.

The first battery unit 210 is accommodated in the accommodation space, and the second battery unit 230 is located outside the digital door lock 100, and can be separated from the first battery unit 210 when necessary, such as recharging. have. In addition, the first battery part 210 is fixedly coupled to the digital door lock 100, and is formed to be separated into the digital door lock 100 only when necessary, such as abnormal operation or replacement of the first secondary battery cell 216. I can.

The connection cable 250 may be formed of a flexible cable or a flexible PCB cable like the connection cable described above. In addition, the connection cable 250 may have a USB terminal, a 5-pin terminal, or a C-type terminal formed at an end thereof. The connection cable 250 may be electrically coupled to a second charge/discharge terminal (not shown) of the second battery unit 230. The second battery unit 230 may be separated from the first battery unit 210 and charged by a separate charging device. When the second battery unit 230 is located outside, the second battery unit 230 can easily increase the capacity. The second battery unit 230 may be fixed to the door by a separate fixing means.

So far, the present invention has been looked at in detail centering on the preferred embodiments shown in the drawings. These embodiments are not intended to limit the present invention, but are merely illustrative, and should be considered from an illustrative point of view rather than a restrictive point of view. The true technical protection scope of the present invention should be determined not by the above description, but by the technical spirit of the appended claims.

100: digital door lock 102: operating power supply
104: digital door lock body 106: digital door lock cover
200: battery device for digital door lock
210: first battery unit 212: first case
212a: first case body 212b: first case cover
212c: first binding means 214: first accommodation space
216: first secondary battery cell 220: first charge/discharge terminal
222: first circuit board 222a: first charging circuit unit
222b: first protection circuit portion 222c: first booster circuit portion
222d: first discharge circuit unit 222e: first charge detection unit
222f: switching unit 222g: diode
230: second battery unit 232: second case
232a: second case body 232b: second case cover
232c: second binding means 234: second accommodation space
236: second secondary battery cell 240: second charge/discharge terminal
242: second circuit board 242a... second charging circuit part
242b: second protection circuit portion 242c: second booster circuit portion
242d: second discharge circuit unit 242e: second charging detection unit
250: connection cable

Claims (8)

It is a battery device for a digital door lock that supplies power to a digital door lock having an operating power supply,
A first battery unit having a rechargeable first secondary battery cell and connected to the operating power supply unit of the digital door lock to supply power, and
It includes a second battery unit having a rechargeable second secondary battery cell, detachably coupled to the first battery unit to supply power to the first battery unit,
The second battery part is charged separately from the first battery part,
The battery device for a digital door lock, characterized in that the second battery unit is formed to have a larger charging capacity than the first battery unit. The method of claim 1,
The discharge voltage of the second secondary battery cell gradually or stepwise decreases as the use time of the first and second battery parts increases, or
A battery device for a digital door lock, characterized in that it is formed to generate a charging notification signal when charging is required by sensing cell voltages of the first and second secondary battery cells. The method of claim 1,
The first battery part and the second battery part are located outside the digital door lock, and the first battery part is electrically connected to an operation power supply of the digital door lock by a connection cable. The method of claim 1,
The battery device for a digital door lock, wherein the first battery unit and the second battery unit are located inside the digital door lock. The method of claim 1,
The first battery part is located inside the digital door lock, the second battery part is located outside the digital door lock, and the first battery part and the second battery part are connected by a connection cable. For battery device. The method according to any one of claims 1 to 5,
The second battery unit and the first battery unit are formed to selectively supply power to the operating power supply unit, characterized in that the digital door lock battery device. The method according to claim 3 or 5,
The connection cable is a digital door lock battery device, characterized in that formed of a flexible cable. The method according to any one of claims 1 to 4,
The battery device for a digital door lock, characterized in that the first battery part and the second battery part are connected through a USB terminal.

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