JP2001008381A - Backup power-supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backup power-supply apparatus which is low cost and whose fluxibilities of mounting operation is higher. SOLUTION: This backup power-supply apparatus is provided with a power- supply terminal, which is connected to a battery at the outside of the apparatus. The backup power-supply apparatus is provided with an input terminal, by which a changeover signal used to change over a power supply is inputted from the outside. The backup power-supply apparatus is provided with a charger which is connected to the power-supply terminal and which charges the battery. The backup power-supply apparatus is provided with a DC/AC converter 5, which is connected to the power-supply terminal, and by which a DC current from the battery is converted into an AC current as a backup power supply. The backup power-supply apparatus is provided with an operating-state output terminal 6 which outputs the signal of the operating state of the backup power supply. The backup power-supply apparatus is provided with a backup output terminal 7 for the backup power supply, which is connected to the DC/AC converter 5. The DC/AC converter 5 is operated or stopped by the changeover signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup power supply for supplying a backup power supply to a host device upon receiving a switching signal when the supply of power to the host device is interrupted.

[0002]

2. Description of the Related Art There is a UPS (uninterruptible power supply) as a backup power supply for backing up a power supply to a host device in the event of a power failure. This UPS has a built-in battery and is widely used for OA equipment such as a personal computer, and has a function of automatically switching a power supply at the time of power failure and recovery from a power failure, and a function of allowing a personal computer to automatically save data at the time of a power failure.

[0003]

According to the above-mentioned backup power supply device, an automatic switching circuit and a control circuit for a personal computer or the like are required and are expensive. In addition, since the life of the battery built in the backup device is shortened when the ambient temperature is high, the backup power supply device cannot be installed in an atmosphere having a high temperature, and there is a limitation on a mounting place. In some higher-level devices, it is not necessary to automatically switch the power supply at the same time as the power failure, and a backup power supply may be supplied when the power supply becomes necessary after the power failure.

Accordingly, an object of the present invention is to provide a backup power supply which is inexpensive and has a higher degree of freedom in mounting.

[0005]

According to one aspect of the present invention, there is provided a backup power supply according to the present invention.
As shown in FIG. 1, a power supply terminal 4 connected to a battery outside the apparatus; an input terminal 9 for inputting a switching signal for switching power supply from outside; and a charger connected to the power supply terminal 4 and charging the battery. 3, a DC / AC converter 5 connected to a power supply terminal 4 and converting a DC current from the battery into an AC current as a backup power supply; and an operation state output terminal 6 for outputting information on an operation state of the backup power supply. A backup output terminal 7 of the backup power supply connected to the DC / AC converter 5;
The / AC converter 5 is operated and stopped by the switching signal.

With this configuration, since the power supply terminal is provided, a battery external to the apparatus can be connected to the power supply terminal. When a backup power supply is required, a power supply switching signal is input from the outside, and the switching signal is input. By DC
Since the / AC converter is operated, a DC current supplied from a battery outside the device is converted into an AC current, and can be supplied from an output terminal as a backup power source.
This can be confirmed by the signal of the power supply state.

The information on the state of the backup power supply means, for example, the presence or absence of the output of the backup power supply, the remaining amount of the battery, the presence or absence of the supply of the external steady power supply, and the like. Since the battery can be placed outside the device, the battery can be placed in a place having a low temperature suitable for the battery, and the backup power supply can be placed in a place having a higher temperature than the place where the battery is placed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding members are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 1 is a block diagram showing the configuration of a backup power supply 1 according to the present invention. The backup power supply 1 (this device 1) has an external commercial power supply 43 (AC100V)
An external power input terminal 2 to which a cable 34 (see FIG. 2) for inputting (see FIG. 2) is connected is provided. Further, an AC charger 3 as a charger of the present invention is provided, and the AC charger 3 generates a charging voltage by an external commercial power supply 43 supplied from the external power input terminal 2 in a normal state. External backup battery 21 connected via battery connection terminal 4 as a power supply terminal (see FIG. 2)
This charging voltage is applied to the battery 21 to appropriately charge the battery 21.

Since the battery connection terminal 4 is provided in the backup power supply 1, the battery can be installed outside the apparatus, and the backup power supply 1 can be downsized. Further, it is not necessary to remove the backup power supply 1 when replacing the battery. In addition, the battery can be easily installed by changing the capacity of the battery according to the purpose of use.

A cable 22 (see FIG. 2) for connecting a backup battery 21 to the backup power supply 1 is connected to the battery connection terminal 4 of the backup power supply 1. Further, the backup power supply device 1 includes a DC / AC converter 5 (inverter).
The C / AC converter 5 converts the DC power supplied from the backup battery 21 to AC power (100 V AC) during a power failure.
And output. In order to simplify the circuit, the output waveform is not a sine wave but a square wave with a rising slope and a dull shape. Further, it has a function of starting operation in response to an operation signal from an external host device 31 (device to which backup power is supplied) (see FIG. 2) (details will be described later).

The backup power supply 1 further includes a DC
/ AC converter 5 is (1) outputting AC power as backup power to upper-level device 31 (during AC output); (2)
Three operating states: the remaining battery level is low (battery level warning), and (3) the external AC power supply to the charger 3 is energized (AC power is energized). And, if applicable, outputs a corresponding signal to each of the photocouplers 10A, B, and C of the status output means 10 to set the photocouplers 10A, B, and C to the H state, and
From A, B, and C, via the operation state output terminal 6 and the cable 40 (see FIG. 2) connected thereto, the display section 37 (see FIG. 2) provided in the host device 31 displays “AC output. "monitor,
Output to the "battery remaining amount warning" monitor and the "AC power supply energized" monitor (not shown).

The backup power supply 1 is further provided with a backup output terminal 7, and a cable 33 (see FIG. 2) for supplying backup power to the host device 31 when an external commercial power supply 43 (see FIG. 2) fails. Connected. DC /
A low-pass filter 8 is provided between the AC converter 5 and the backup output terminal 7, and suppresses a noise waveform generated by a load (in particular, inductance L) of the host device 31 connected to the backup output terminal 7.

Further, an external operation input terminal 9 is provided as an input terminal of the present invention, and is used to input an operation of an operation switch 38A (see FIG. 2) provided in the host device 31 to the DC / AC converter 5. The cable 41 (see FIG. 2) is connected.

A battery 21 (see FIG. 2) installed outside the device is connected to the backup power supply 1 via a cable 22 (see FIG. 2). The battery 21 may be a secondary battery such as a sealed lead battery.

Further, the backup power supply 1 can be inexpensive because it does not include an automatic switching circuit for switching the power supplied to the host device 31 and the backup power supply 1 and a control circuit for a personal computer or the like.

Next, referring to the block diagram of FIG. 2, the configuration of the host device 31 connected to the backup power supply 1
The connection with the device 1 will be described. The host device 31 includes a power supply unit 3
2, drive unit 35, shutter 36, display unit 37, operation switch 38
A, B, and a control unit 39 are provided.

The power supply unit 32 is connected to the apparatus 1 by a cable 33.
Connected to the backup output terminal 7, and receives a supply of backup power from the apparatus 1 when the commercial power supply 43 fails. A commercial power supply 43 is further connected to the power supply unit 32. The power supply unit 32 is connected to the external power supply input terminal 2 by a cable 34, and the commercial power supply 43 is supplied to the AC charger 3 of the present apparatus 1 (see FIG. 1). You. The commercial power supply 43 may not be supplied to the present apparatus 1 via the power supply unit 32 but may be directly connected to the present apparatus 1 and supplied.

The power supply section 32 is connected to the drive section 35 so that the drive section 35
Supply power to The drive unit 35 includes a motor (not shown), a drive chain, a shutter winding mechanism, and the like, and drives opening and closing of the shutter 36. The shutter 36 is a door that closes a garage or warehouse (not shown).

The display unit 37 is illuminated by a lamp (LED) (not shown) or a plasma display (not shown) to display the host device 31.
The power supply state of the device 1 and other operations that need to be known in the operation of the device 1 are displayed.

For example, when it becomes necessary to supply backup power to the host device 31 during a power failure, the operation switch 38
When the user operates A, this device 1
The supply of the backup power to 31 is started. For example,
When it is necessary to open and close the garage door when a power outage occurs, backup power can be supplied to the automatic door opening / closing device, which is a higher-level device. A two-stage parking device installed in a parking lot of a condominium or the like only needs to supply backup power when a passenger car needs to be taken in and out.

If the supply of power is interrupted during the use of the artificial dialysis machine, which is a host device, the artificial dialysis machine is required to be restarted at the discretion of the patient, doctor or nurse in use. Backup power can be supplied by patients, doctors and nurses. Therefore, there is no need to install an automatic switching circuit in the device 1, and the device can be made inexpensive.

A signal for starting the supply of power is sent from the operation switch 38A of the host device 31 to the external operation input terminal 9 of the device 1 via the cable 41. On the other hand, the operation switch 38B is a switch for starting and stopping the host device 31, and a signal for starting and stopping from the operation switch 38B is sent to the control unit 39.

The control unit 39 controls each unit of the host device 31 and
Processing (control) is performed based on a signal from the operation state output terminal 6 for control of the present apparatus 1, a display signal is sent to the display unit 37, and a recovery control from a power failure is performed.

Next, the operation of the present apparatus 1 will be described with reference to the chart of FIG. 3 and to FIGS. 1 and 2 as appropriate. When the commercial power supply 43 is supplied to the AC charger 3 of the device 1 (AC
In the case of input, corresponding to the point 51 in FIG.
Applies a charging voltage to the battery 21 connected via the battery connection terminal 4, so that the battery 21
Is charged as appropriate.

A is also used for the DC / AC converter 5 (inverter).
Since the charging voltage from the C charger 3 is applied, this is DC /
Acting as a voltage signal to the AC converter 5, a signal indicating “AC power is being supplied” is sent from the DC / AC converter 5 to the photocoupler 10C of the status output unit 10, and the photocoupler 10C
State (corresponding to point 53 in FIG. 3). H from the photocoupler 10C to the terminal 84 (see FIG. 5) in the operation state output terminal 6
An output signal indicating the state is sent, and further output to the host device 31. In the host device 31, this output signal is
39, and further sent from the control section 39 to the display section 37. The display section 37 monitors that the charging voltage is applied to the battery by the commercial power supply 43 by the "AC power supply" monitor (not shown). ) Is turned on (corresponding to the point 55 in FIG. 3).

When the commercial power supply 43 is no longer supplied to the apparatus 1 or in the case of a power failure (when the AC input is lost, corresponding to the point 52 in FIG. 3), the charging voltage from the AC charger 3 is reduced. The photocoupler 10C is in the L state (corresponding to the point 54 in FIG. 3), and the "AC
The "power is on" monitor is turned off (corresponding to point 56 in FIG. 3).

Next, the operation of the apparatus 1 in the case of a power failure will be described with reference to the chart of FIG. Immediately after the power failure, the operation switch 38A (see FIG. 2) for operating / stopping the inverter 5 (DC / AC converter) is not operated (point 61), and therefore, the AC output ( There is no backup power supply output (point 65). Inverter 5
Monitors the supply voltage of the battery 21, and when the supply voltage of the battery 21 is close to overdischarge and is equal to or lower than a predetermined value that requires a warning, the photocoupler 10B corresponding to the "battery remaining amount warning" monitor is set to the H state. (Point 72). When the supply voltage of the battery 21 becomes equal to or higher than the above-described predetermined value, the photocoupler 10
B is in the L state (point 71).

The apparatus 1 can back up data even when the supply of the commercial power 43 (see FIG. 2) is stopped, unless the user operates the operation switch 38A provided on the host apparatus 31 (see FIG. 2). Do not start.

When the operation switch 38A of the host device 31 is operated by the user (when the contact is turned on).
(Point 62), a signal is output from the operation switch 38A, and this signal is output to the terminal 81 of the external operation input terminal 9 (see FIG. 1) of the device 1.
(See FIG. 5). With this input, the inverter 5 starts the backup operation, and the photocoupler 10A corresponding to “AC output”.
Is brought to the H state (point 66), and the photocoupler 10A outputs a signal to the terminal 82 of the operation state output terminal 6 (see FIG. 5). At the same time, if the battery supply voltage of the inverter 5 is equal to or higher than the predetermined value, the photocoupler 10B corresponding to the "battery remaining amount warning" monitor is in the L state.

The above operation is performed by the user again using the operation switch 38.
A is released by pressing A (blocking state L) (point 6
3), the inverter 5 stops the backup operation, and sets the photocoupler 10A corresponding to "AC output in progress" to the L state (point 67). The state of the photocoupler 10B corresponding to the "battery remaining amount warning" monitor is the L state.

Next, it is assumed that the user operates the operation switch 38A of the host device 31 again (points 64, 68, 74). Further, it is assumed that the life of the battery is approaching (or that the backup has been performed for a long time by the backup power supply device 1). At this time, if the supply voltage of the battery 21 is equal to or lower than a predetermined voltage for judging overdischarge, the inverter 5 detects this and sets the photocoupler 10B corresponding to the “battery residual warning” monitor to the H state (point 72). ), The photocoupler 10B is the terminal of the operation status output terminal 6.
83 (see FIG. 5).

Further, the inverter 5 monitors the over-discharge of the battery 21, and when the battery 21 becomes lower than a predetermined voltage immediately before the over-discharge voltage, the AC output of the inverter 5 is stopped and the "in AC output" state is set. The corresponding photocoupler 10A is set to the L state (point 69), and the photocoupler 10A stops outputting an output signal from the terminal 82 of the operation state output terminal 6.

The display unit 37 of the host device 31 has an "AC output" monitor. When the photocoupler 10A corresponding to this monitor is in the H state, the "AC output" monitor is turned on, and when the photocoupler 10A is in the L state, it is turned off. I do. The display unit 37 of the host device 31 further has a "battery remaining amount warning" monitor. When the photocoupler 10B corresponding to this monitor is in the H state, it is turned on (point 74), and when it is in the L state, it is turned off (point 73). And

The host device 31 is configured such that the photocoupler 10A for monitoring “AC output” is in the L state, and the operation switch 38A
Is in the energized state H, the fact that the apparatus 1 has stopped to prevent overdischarge of the battery 21 is displayed on a monitor (not shown) of the display unit 37 (for example, "Overdischarge prevention inverter stopped"). It should be displayed on a monitor.).

The "AC output" monitor display displayed on the display unit 37 of the host device 31 may be "inverter in operation". In addition, the monitor display of “battery residual warning” is set to a monitor display of “within charge voltage regulation”, and when the supply voltage of the battery 21 is equal to or more than a predetermined value that is close to overdischarge and requires a warning, The photocoupler 10B corresponding to the "battery level warning" monitor may be set to the H state.

Referring to FIG. 5, the configuration of the front of the apparatus 1 will be described. The external operation input terminal 9 and the operation state output terminal 6 of the device 1 constitute one terminal block for control. External operation input terminal 9 is terminal 81, and operation status output terminal 6 is terminal 8.
2, 83 and 84 are provided. The terminals 81 to 84 may be individually provided instead of one terminal block.

External power input terminal 2, battery connection terminal
4. The backup output terminal 7 constitutes one terminal block, and nameplates labeled "AC input", "battery input" and "AC output" are attached below each terminal.
Instead of one terminal block, the terminal blocks may be provided individually.

The device 1 has a DC breaker 85, and disconnects a large current due to a reverse connection of the battery 21 (see FIG. 2) or a failure of the battery 21 by a supply line (not shown) from the battery 21. Protects internal circuits including inverter 5.

[0040]

According to the present invention, as described above, a power supply terminal connected to a battery external to the apparatus, an input terminal for inputting a switching signal for switching power supply from the outside, a backup output terminal of a backup power supply, and the like are provided. The battery can be installed outside the device, and a backup power supply device that is inexpensive and has a higher degree of freedom in mounting can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a backup power supply device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a host device and a connection with a backup power supply device.

FIG. 3 is a chart showing an operation of the backup power supply device.

FIG. 4 is a chart showing an operation of the backup power supply device in the case of a power failure.

FIG. 5 is a front view of the backup power supply device of FIG. 1;

[Explanation of symbols]

 1 Backup power supply 2 External power input 3 AC charger 4 Battery connection 5 DC / AC converter 6 Operation status output 7 Backup output 8 Low pass filter 9 External operation input 10 Status output 10A, B, C Photo Coupler 21 Battery 22 Cable 31 Host device 32 Power supply unit 33, 34 Cable 35 Drive unit 36 Shutter 37 Display unit 38A, B Operation switch 39 Control unit 40, 41, 42 Cable 43 Commercial power supply 51-54 points 61-69 points 71- 74 points 81, 82, 83, 84 terminal 85 DC breaker

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Choichiro Kozu 2-48-5 Chuo, Nakano-ku, Tokyo Nakanohira Kazu Building Takamizawa Cybernetics Co., Ltd. F-term (reference) 5G015 FA10 GA04 HA04 HA13 JA05 JA32 JA43 JA53 JA55 JA59

Claims (1)

[Claims] A power supply terminal connected to a battery external to the apparatus; an input terminal for externally inputting a switching signal for switching power supply; a charger connected to the power supply terminal for charging the battery; A DC / AC converter connected to convert a DC current from the battery to an AC current as a backup power supply; an operation state output terminal for outputting a signal indicating an operation state of the backup power supply; connected to the DC / AC converter A backup output terminal of the backup power supply; wherein the DC / AC converter is operated and stopped by the switching signal; a backup power supply device.