JPH0458739A - Uniterruptive power unit provided with inspecting function - Google Patents

Abstract

PURPOSE:To judge the capacity deterioration of a storage battery by counting the passage time from inspection start, and informing abnormality by means of an information means if the detected voltage of a storage battery gets under discharge end voltage before a timer counts power stoppage compensating time. CONSTITUTION:By turning on an inspection switch 19, the inspection is started in storage battery mode with out breaking a commercial power supply, and a timer 21 counts the passage time, and when a storage battery 14 falls below discharge stop voltage before it counts power stoppage compensating time, an information means informs abnormality without breaking the commercial power supply, whereby one can judge the capacity deterioration of the storage battery 14. Moreover, when the storage battery voltage falls below discharge end voltage and an inspection end signal is received by an inspection circuit 18, it is informed, so one can grasp the backup possible time to unspecific load without breaking commercial power supply. Furthermore, when the inspection ends, an inverter 16 stops, and a power source switch 12 is turned on, and commercial power is supplied to the load, so the power supply to the load does not cease.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an uninterruptible power supply (UPS) with an inspection function that supplies an input of commercial power or the like to a load such as a computer.

[Conventional technology]

Uninterruptible power supplies that provide constant commercial power supply normally supply commercial power directly to the load, and when a power outage occurs, a storage battery drives an inverter to supply AC output to the load.

Below, the operation of the conventional uninterruptible power supply will be explained based on FIG. The input terminal 50 of this device is connected to a commercial power source, and the output terminal 51 is connected to a load such as a computer. Normally (when receiving commercial power), commercial power is connected to the power switch 52.
It is output as is to the load via the . At the same time, the storage battery 53 is charged by the charger 54. When the power goes out,
The power failure detection signal is input to the control circuit 56 of the inverter 55, and upon receiving the signal, the control circuit 56 outputs a start command to the inverter 55, the inverter 55 starts operating, and the power switch 52 is turned off. During operation of the inverter 55, the control circuit 56 monitors the voltage of the storage battery 53, and when a preset discharge end voltage is reached, the operation of the inverter 55 is stopped to prevent the negative impact on the storage battery 53 due to overdischarge. There is.

[Problem to be solved by the invention]

In an uninterruptible power supply device of a constant commercial power supply type, the inverter 55 is normally inactive and the storage battery 53 is only being charged. However, if the storage battery 53 has deteriorated in capacity at the end of its life, even if the battery voltage during charging appears normal,
When a battery is discharged, the voltage drops in a short period of time, and the appropriate capacity may not be obtained. In addition, the uninterruptible power supply has a rated value called power outage compensation time that indicates the minimum possible time for backup amplifier when power is supplied at the rated output, but if the load is smaller than the rated value, the discharge amount of the storage battery 53 will be , will be smaller than the rated value, so the backup time will be extended. Therefore, the possible backup time differs depending on the capacity of the load. In order to understand the deterioration state of the capacity of the storage battery 53 and the possible time for hacking up an unspecified load, it cannot be determined unless a power outage actually occurs and the inverter 55 is operated.

Therefore, in order to understand the deterioration of the capacity of the storage battery 53 and the possible backup time, a means to bring the uninterruptible power supply into a power outage state is considered. For example, in the case of an uninterruptible power supply with an outlet plug, commercial power can be easily turned off by removing the plug from the outlet. However, in the case of the following uninterruptible power supplies, it is difficult to cut off the commercial power supply easily.■ The uninterruptible power supply is embedded in a raised floor or partition, etc., and the commercial wiring is directly connected to the uninterruptible power supply inside the floor or wall. When connected to a power supply.

■ Mutai i! If the commercial input part of the power supply has a terminal block structure and the wiring cannot be disconnected without using a tool.

In such cases, the aforementioned problems cannot be easily solved.

Further, even if the commercial power supply can be easily turned off, if the storage battery is discharged to the final discharge voltage, the output of the uninterruptible power supply will be cut off. Therefore, in order to perform the above confirmation, it becomes impossible to supply power to the load without interruption.

Therefore, it is an object of the present invention to be able to determine the capacity deterioration of a storage battery without cutting off the commercial power supply, to be able to grasp the possible backup time for an unspecified load, and to ensure that power is not supplied to the load even after inspection. It is an object of the present invention to provide an uninterruptible power supply device with an inspection function that does not fail.

[Means to solve the problem]

The uninterruptible power supply device with inspection function of the present invention includes: a power switch provided between an input terminal and an output terminal; a storage battery connected to the input terminal side of the power switch via a charger; and an output of the power switch. an inverter connected to a terminal side that converts the DC voltage of the storage battery into an AC voltage and applies it to the output terminal; and an inverter that detects a power outage at the input terminal and sends a start signal to the inverter and turns off the power switch. a control circuit that switches between a storage battery mode in which the voltage of the storage battery is detected and when the voltage of the storage battery becomes lower than a discharge end voltage, a stop signal is sent to the inverter, the power switch is turned on, and an inspection completion signal is output. , a timer for transmitting an inspection start signal that brings the storage battery mode to the control circuit when the inspection switch is turned on, receiving the inspection end signal, and counting the elapsed time from the time when the inspection switch starts being turned on. When the inspection circuit and the timer receive an inspection completion signal when the elapsed time is less than the power outage compensation time, an abnormality is notified;
The apparatus is provided with a notification means for notifying normality when an inspection completion signal is received when the elapsed time according to the timer is equal to or longer than the power failure compensation time.

[For production]

According to the uninterruptible power supply device with inspection function of the present invention, by turning on the inspection switch of the inspection circuit, inspection can be performed in the same storage battery mode without actually cutting off the commercial power supply. Then, a timer counts the elapsed time from the start of the inspection, and if the detected voltage of the storage battery falls below the discharge end voltage before the value counts the power outage compensation time, the notification means will notify an abnormality and determine whether the capacity of the storage battery has deteriorated. . In addition, when the detection voltage of the storage battery becomes lower than the discharge end voltage and the inspection completion signal is received by the inspection circuit, the notification means will notify you.
It is possible to understand the possible uptime for unspecified loads. Furthermore, when the detection voltage of the storage battery falls below the discharge end voltage and the inspection is completed, the inverter stops and the power switch is automatically switched on, automatically switching to the input mode, and the input commercial power is supplied to the output load. , the power supply to the load never stops.

〔Example〕

An embodiment of the present invention will be described based on FIG. In the figure, 10 is an input terminal connected to a commercial power supply, 11 is an output terminal connected to a load, 12 is a power switch, 13 is a charger connected to the input terminal 10 side of the power switch 12, 1
4 is a storage battery connected to the charger 13, and an inverter 16 is connected between the storage battery 14 and the output terminal 11 side of the power switch 12 via a diode 15, and converts the DC voltage of the storage battery 14 into AC voltage. and is applied to the output terminal 11. Reference numeral 17 is a control circuit, which operates in a storage battery mode that detects a power outage and sends a start signal to the inverter 16 and turns off the power switch 12, and a storage battery mode that detects the voltage of the storage battery 14 and detects the voltage of the storage battery 14 when the value becomes lower than the discharge end voltage. Then, the mode switches to an input mode in which a stop signal is sent to the inverter 16 and the power switch 12 is turned on. Furthermore, 18 is a check circuit, including a check switch 19, a reset switch 20. It has a timer circuit 21 and a buzzer 22.
．． LED 23 indicating charging abnormality. LED2 indicating charging normality
A notification means 25 consisting of 4 is connected.

Next, the inspection operation will be explained. By turning on the inspection switch 19, first, the same signal as a normal power outage signal is output from the inspection circuit 18 to the control circuit 17 (inspection start command). The control circuit 17 outputs a starting command to the inverter 16, and the inverter 16 starts operating, and at the same time, the power switch 12 is turned off, disconnecting the input terminal 10 from the output terminal 11 (storage battery mode). Power is supplied by an inverter 16. Also, at this time, the timer 21 of the inspection circuit 18 starts counting and continues counting until a preset power outage compensation time. During the inspection, the control circuit 17 monitors the voltage of the storage battery 14,
When the voltage value reaches the discharge end voltage of the storage battery 14, the inverter 16 is stopped and the power switch 12 is turned on again (input mode), thereby continuing power supply to the output terminal 11 without interruption. Also, once the inspection is complete,
An inspection completion signal is output from the control circuit 17 to the inspection circuit 18. Upon receiving the signal, the inspection circuit 18 stops the inspection start command and performs the following operations depending on the operating state of the timer 21.

- If the timer 21 receives an inspection completion signal before counting the power outage compensation time, the buzzer 22 sounds as a warning of charging abnormality (abnormality of the storage battery 14), and the LED 23 lights up to indicate the abnormality.

- When the timer 21 receives an inspection end signal after counting the power outage compensation time, the buzzer 22 sounds to indicate that charging is normal (the storage battery 14 is normal) and the LED 24 lights up to indicate normality.

The user can tell by the buzzer 22 that the inspection has been completed, and can determine whether the inspection is abnormal or normal by looking at the LEDs 23 and 24 that are lit at that time.

According to the uninterruptible power supply with inspection function configured in this way, by turning on the inspection switch 19 of the inspection circuit 18, inspection can be performed in the same storage battery mode without actually cutting off the commercial power supply. Then, the timer 21 counts the elapsed time from the start of the inspection, and if the detected voltage of the storage battery 14 becomes equal to or lower than the discharge end voltage before the power outage compensation time is counted, the notification means 25 notifies the user of an abnormality. In this way, capacity deterioration of the storage battery 14 can be determined without cutting off the commercial power supply.

Further, when the detected voltage of the storage battery 14 becomes equal to or lower than the discharge end voltage and an inspection completion signal is received by the inspection circuit in one day, the notification means 25 notifies the inspection circuit. Therefore, by measuring the time from the start of the inspection to the notification of the end of the inspection using a clock, stopwatch, etc., it is possible to grasp the possible hack amplifier time for an unspecified load without having to cut off the commercial power supply.

Furthermore, when the detected voltage of the storage battery 14 becomes lower than the discharge end voltage and the inspection is completed, the inverter 16 stops and the power switch 12 is automatically switched to the input mode, which turns on the power switch 12 and supplies commercial power to the load. The power supply never stops.

Another embodiment of the invention is shown in FIG. Note that the same parts as in the example of FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.

This embodiment is characterized by the use of a timer 30 with a digital display function, which also functions as the timer 21 in the example shown in FIG.

That is, the timer 30 starts counting at the same time as the inspection starts, and sends a signal to the inspection circuit 18 when the power outage compensation time comes. Further, when the storage battery 14 finishes discharging and reaches the voltage and the inspection is completed, the timer 30 also stops counting and displays the required time.

This allows the user to easily know the exact bank-up time without using a clock or the like.

〔Effect of the invention〕

According to the uninterruptible power supply with inspection function of the present invention, by turning on the inspection switch of the inspection circuit, inspection can be performed in the same storage battery mode without actually cutting off the commercial power supply. Then, the timer counts the elapsed time from the start of the inspection, and if the detected voltage of the storage battery falls below the discharge end voltage before the value counts the power outage compensation time, the notification means will notify you of an abnormality and determine if the capacity of the storage battery has deteriorated. . In addition, when the detection voltage of the storage battery becomes lower than the discharge end voltage and the inspection completion signal is received by the inspection circuit, the notification means will notify you.
You can understand the possible uptime for unspecified loads. Furthermore, when the detection voltage of the storage battery becomes lower than the final discharge voltage and the inspection is completed, the inverter stops and the power switch is turned on, automatically switching to the input mode, and the input commercial power is supplied to the output load. Therefore, it is possible to obtain the effect that power supply to the load is not interrupted.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is a circuit diagram of another embodiment of the invention, and FIG. 3 is a circuit diagram of a conventional example. 10...Input terminal, 11...Output terminal, 12...
Power switch, 13... Charger, 14... Storage battery,
16... Inverter, 17... Control circuit, 18...
・Inspection circuit, 19...Inspection switch, 21.30...
・Timer, 25...Notification means

Claims (1)

[Scope of Claims] A power switch provided between an input terminal and an output terminal; a storage battery connected to the input terminal side of the power switch via a charger; and a storage battery connected to the output terminal side of the power switch. an inverter that converts DC voltage of a storage battery into an AC voltage and applies it to the output terminal; a storage battery mode that detects a power outage at the input terminal and sends a start signal to the inverter and turns off the power switch; A control circuit that detects the voltage of the storage battery and switches to an input mode that sends a stop signal to the inverter when the voltage becomes equal to or lower than the discharge end voltage, turns on the power switch, and outputs an inspection completion signal, and turns on the inspection switch. an inspection circuit having a timer for transmitting an inspection start signal for setting the storage battery mode to the control circuit, receiving the inspection end signal, and counting elapsed time from the start of the on-operation of the inspection switch; and the timer. an inspection device comprising: notification means for notifying an abnormality when an inspection end signal is received when the elapsed time by the timer is less than the power outage compensation time; and notifying means for notifying normality when the inspection end signal is received when the elapsed time by the timer is greater than or equal to the power outage compensation time. Functional uninterruptible power supply.