JP2766690B2 - Battery disconnection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a battery disconnection method at the time of emergency power-off in a power supply device having a battery backup function, to provide a battery disconnection method capable of connecting an extension unit to a basic unit without limitation. A first and a second relay that are activated by a battery disconnection signal by disconnection of an emergency power disconnection switch, a first relay contact opened and closed by the first relay, and a battery connected to the first relay contact. , Between the AC-DC converter and the DC-DC converter, and, for a basic unit having a second relay contact opened and closed by the second relay, an expansion unit configured in the same manner as the basic unit. A battery is sequentially disconnected by sequentially connecting via a second relay contact and opening the first and second relay contacts.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery disconnection method for an emergency power-off in a power supply device having a battery backup function.

2. Description of the Related Art In recent years, non-stop computers have become non-stop, and at the time of a power failure or momentary interruption, a battery backup function mainly works. In an electronic computer system using a plurality of power supply devices having such a battery backup function, it is necessary to disconnect the battery when the emergency power supply is disconnected.

[Prior Art] FIG. 3 shows a conventional battery disconnection method when an emergency power supply is disconnected.

In FIG. 3, when an emergency power-off is performed, the emergency power-off switch 1 is turned off so that the basic unit 2 is turned off.
The AC / DC converter 3, the AC / DC converter 5 in the extension n unit 4, and the AC / DC converter 7 in the extension n + 1 unit 6 have no input so that the power supply is urgently cut off. However, as a countermeasure against power failure and momentary interruption, batteries 8 to 10 are respectively mounted, and since batteries 8 to 10 are connected to DC / DC converters 11 to 13, DC / DC converters 11 to 13 The output is maintained until the batteries 8-10 discharge.

Therefore, when the emergency power-off switch 1 is turned off, a signal for turning off the alarm contact 14 is received by the relays 15 to 17 as a battery cut-off signal and turned off.

For this reason, the relay contact 18 is opened and the battery 8 is cut off, and the relay contact 19 is opened and cut off to the battery 9, and at the same time, the relay contact 20 is opened and the battery 8 is cut off.
10 is cut. In this manner, all the batteries 8 to 10 are disconnected by opening the rerouting contacts 18 to 20.

[Problems to be Solved by the Invention] However, in such a conventional battery disconnection method, an alarm contact for turning on and off a relay of the basic unit in accordance with an increase in the number of expansion units connected to the basic unit. There is a limitation in increasing the capacity, and there has been a problem that the extension unit cannot be connected to the basic unit without limitation.

The present invention has been made in view of such a conventional problem, and by sequentially connecting an extension unit to a basic unit via a relay contact, the extension unit can be connected to the basic unit without limitation. It is intended to provide a battery disconnection method that can be connected.

[Means for Solving the Problems] FIG. 1 is an explanatory view of the principle of the present invention.

In FIG. 1, reference numerals 10 and 13 denote first and second relays operated by a battery disconnection signal by disconnection of an emergency power disconnection switch 16, reference numeral 18 denotes a first relay contact which is opened and closed by the first relay 10, and reference numeral 24 denotes a first relay contact. Battery connected to one relay contact 18,
4 is an AC-DC converter, 7 is a DC-DC converter, 21 is a second relay contact opened and closed by the second relay 13, 1 is a basic unit, and 2 is sequentially connected via a second relay contact 21. This is an extension unit configured similarly to the unit 1.

[Operation] In the present invention, when the emergency power-off switch is turned off, the first relay and the second relay of the basic unit are turned off, so that the first relay contact is turned off and the battery is cut off. Since the two relay contacts are turned off, the first relay and the second relay of the extension are turned off, and the battery of the extension is disconnected. In this way, the battery of the extension portion is sequentially disconnected.

The basic unit is provided with only two relays, the first relay and the second relay, and there is no need to increase the capacity of the alarm contact, so that the extension unit can be connected to the basic unit without limitation. .

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

 FIG. 2 shows an embodiment of the present invention.

In FIG. 2, reference numeral 1 denotes a basic unit constituting a power supply device;
Denotes an extension n unit constituting the power supply device, and 3 denotes an extension n + 1 unit constituting the power supply device. Extended n part 2 for basic part 1
Are connected, and the extension n + 1 section 3 is connected to the extension n section 2 respectively.

Reference numerals 4 to 6 denote AC / DC (AC-DC) converters.
The DC converters 4 to 6 convert the input alternating current into direct current.
Reference numerals 7 to 9 denote DC / DC converters.
The converters 7 to 9 exchange the plurality of direct currents with the exchanged direct current.

10-12 and 13-15 are AC / DC converters 4-6 and DC / DC
A first relay and a second relay connected between the converters 7 to 9;
The relay 13 is connected to an alarm contact 17 which is opened and closed by an emergency power-off switch 16, and the first relay 11 and the second
The relay 14 is connected to the second relay contact 21 of the basic unit 2, and further the first relay 12 and the second relay 12 of the extension n + 1 unit 3.
Reference numeral 15 is connected to the second relay contact 22 of the extension n unit 2.

The first relays 10 to 12 open and close the first relay contacts 18 to 20, respectively, and the second relays 13 to 15 open and close the second relay contacts 21 to 23, respectively.

24 to 26 are batteries, and batteries 24 to 26 are first
AC / DC converters 4-6 and DC / DC via relay contacts 18-20
It is connected between DC converters 7-9. The AC power input terminal 27 is connected to the AC power
/ DC converters 4 to 6 respectively.

 Next, the operation will be described.

During normal operation, the AC power is used as an emergency power off switch.
Input to AC / DC converters 4 to 6 via 16, convert AC to DC by AC / DC converters 4 to 6, boost DC by DC / DC converters 7 to 9, and output to each unit. At this time, the batteries 24 to 26 are charged by the AC / DC converters 4 to 6, respectively.

Next, at the time of power failure or momentary interruption, the AC / DC converter 4
No AC input to ~ 6, but batteries 24-26
, The outputs of the DC / DC converters 7 to 9 are maintained. Thus, the battery backup function works.

Next, at the time of emergency power-off, the emergency power-off switch 16
Is cut off, no AC power is input to the AC / DC converters 4 to 6, and the emergency power supply is cut off. In this case, the alarm contact 17 is turned off by turning off the emergency power cutoff switch 16, and the first relay 10 and the second relay 13 are turned off. Therefore, the first relay contact 18 is turned off, and the battery 24 is disconnected. Since the second relay 13 is turned off when the second relay 13 is turned off, the first relay 11 and the second relay 14 of the extension n unit 2 are turned off, and the first relay contact 19 and the second relay contact 22 are turned off. Is turned off. Therefore, battery 25 is disconnected. Also, the extension n + 1
The first relay 12 and the second relay 15 of the part 3 are turned off,
The first relay contact 20 and the second relay contact 23 are turned off, and the battery 26 is disconnected.

Thus, the battery 24 of the basic unit 1, the battery 25 of the extended n unit 2, and the battery 26 of the extended n + 1 unit 3 are sequentially disconnected. The first relays 10 to 12 and the second relays are provided in the basic unit 1, the extension n unit 2, and the extension n + 1 unit 3.
Two relays 13 to 15 are provided, and the second relay contact
Since the connection is made sequentially via 21 to 23, the basic unit 1
It is not necessary to increase the capacity of the alarm contact 17 in (1), and the extension units 2 and 3 can be connected to the basic unit 1 without limitation.

[Effects of the Invention] As described above, according to the present invention, the first and second relays of the basic unit are turned off by the disconnection of the emergency power-off switch, and the battery of the basic unit is turned off by the contact of the first relay. Is disconnected, and the battery of the extension unit is sequentially disconnected by turning off the second relay contact. Therefore, there is no need to increase the capacity of the alarm contact, and the extension unit can be connected to the basic unit without restriction. it can.

[Brief description of the drawings]

 FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing a conventional example. In the figure, 1... Basic part, 2... Extended n part, 3... Extended n + 1 part, 4-6... AC / DC converter (AC-DC converter), 7-9. -DC converter), 10 to 12 ... first relay, 13 to 15 ... second relay, 16 ... emergency power off switch, 17 ... alarm contact, 18 to 20 ... first relay contact, 21 to 23 … Second relay contact, 24 to 26… Battery, 27 …… Input terminal.

Claims (1)

(57) [Claims] The first and second relays (10), which are activated by a battery disconnection signal by disconnection of an emergency power disconnection switch (16),
(13), a first relay contact (18) opened and closed by the first relay (10), and a battery (24) connected to the first relay contact (18) are connected to an AC-DC converter (4). )
And a DC-DC converter (7) and a basic unit (1) having a second relay contact (21) opened and closed by the second relay (13). The extension unit (2) configured in the same manner as described above is sequentially connected via the second relay contact (21), and the first and second relay contacts (18) and (21) are opened to open the battery (2).
4) Battery cutting method characterized by cutting sequentially.