JP2001025176A - Uninterruptible power facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability and performance of an uninterruptive power unit more by enabling a storage battery to be positively kept at prescribed output, even when in the case where the outside air temperature is low. SOLUTION: This power facility is provided with a first casing 1, where incidental facilities excluding a storage battery 2 are stored, a second casing 3 where the storage battery 2 is stored, a first communication path 5 which leads gas through a quantity-of-wind adjusting means 9 from the first casing 1 to the second casing 3, and a second communication path 13 which returns the gas from the second casing 3 to the first casing 1, and the first casing is provided with a suction port 4 and a discharge port 6 capable of letting gas flow in and out, and the second casing 3 is provided with a discharge port 12 capable of letting gas flow out, thus this is constituted so that it can keep the temperature of a storage battery at a prescribed temperature, by leading the gas warmed up within the first casing 1 into the storage battery 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply, and more particularly to an uninterruptible power supply capable of stably supplying power in an emergency such as a power outage of an electric equipment.

[0002]

2. Description of the Related Art A typical prior art of an uninterruptible power supply having a storage battery as an emergency power supply is disclosed in JP-A-10-243558 and Japanese Patent No. 284490. The former prior art is a device having a commercial power supply, a storage battery, and an inverter having a function of converting a direct current from the storage battery to an alternating current when the commercial power supply is abnormal, and outputting a harmonic current. In order to prevent this, a feature is provided in which a control section (electric control circuit) of the inverter is provided with an active filter function, and the electric control circuit is improved in terms of hardware.

[0003] In the former prior art, only the function of charging the storage battery is provided, and there is no point in taking measures for stabilizing the performance of the storage battery.
It may be said that no measures have been taken. Generally, it has been found that the output of a storage battery fluctuates depending on the ambient temperature and is greatly affected. When the storage battery is installed in an environment where the ambient temperature is stable, for example, it is good if the storage battery is indoors with air conditioning, but if not, the above problem occurs. Due to various restrictions on the installation location, it is often installed outside the room where air conditioning is not at all possible. In particular, in such a case, when the temperature of the outside air decreases, the performance of the storage battery decreases, which may hinder operation as an uninterruptible power supply that requires a predetermined output as the storage battery.

[0004] On the other hand, the latter prior art relates to the configuration of an uninterruptible power supply which aims to improve reliability and performance by preserving a storage battery. When the battery temperature increases, the amount of charged electricity increases. When the open circuit voltage of the battery falls below a predetermined value, addressing the problem leading to early deterioration,
The battery is charged for a time calculated based on the opening time, and the replacement time is displayed by various monitor functions for the battery.

As is apparent from the above description, this latter prior art is rather a passive measure to prevent the reliability of the uninterruptible power supply from deteriorating due to the consumption and deterioration of the battery. Therefore, in both prior arts, there is no suggestion of any aggressive measures to prevent the battery output from decreasing or fluctuating. It is hard to say that it is perfect in terms of improving reliability and performance.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and an object of the present invention is to provide an external air temperature as a factor affecting the output of a storage battery. By minimizing the effect and enabling the storage battery to be actively maintained at a predetermined output even when the outside air temperature is low, it is intended to further improve the reliability and performance of the uninterruptible power supply. On the point.

[0007]

The present invention has the following configuration to achieve the above object. That is, in the present invention, in the uninterruptible power supply having at least a storage battery as a power source, the invention of claim 1 guides the gas heated by auxiliary equipment except the storage battery to the storage battery, and the temperature of the storage battery (battery temperature, hereinafter referred to as battery temperature). ) Can be maintained at a predetermined temperature.

In the present invention, the invention of claim 2 is
With respect to the uninterruptible power supply according to the invention of claim 1, temperature detection means for detecting one of a temperature of a gas heated by ancillary equipment except the storage battery and a temperature of the storage battery,
An air flow adjusting means for adjusting an amount of gas guided to the storage battery based on a temperature signal detected by the temperature detecting means is provided.

In the present invention, the invention of claim 3 is
The uninterruptible power supply according to the second aspect of the invention is characterized in that the storage battery and auxiliary equipment excluding the storage battery are housed in different housings.

In the present invention, the invention of claim 4 is
In the uninterruptible power supply system according to the second aspect of the present invention, a first housing in which ancillary equipment except the storage battery is housed, a second housing in which the storage battery is housed, A first communication passage for guiding gas from the housing to the second housing via the air volume adjusting means, and a second communication passage for returning gas from the second housing to the first housing. A passage provided with a suction port and a discharge port through which gas can flow into and out of the first housing; and a discharge port through which gas can flow out of the second housing. It is characterized by having done.

Further, in the present invention, the invention of claim 5 is as follows:
In the uninterruptible power supply system according to the second aspect of the present invention, a temperature detecting means for detecting a temperature of the storage battery, and an output of the storage battery is supplied as information corresponding to a temperature signal detected by the temperature detecting means. And information transmission means for transmitting the information to an operation control system of an electric device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 schematically shows the structure of an uninterruptible power supply system according to a first embodiment of the present invention. The uninterruptible power supply equipment includes a storage battery group 2 including a plurality of storage batteries 2, a rectifier (not shown) that rectifies AC power from a commercial power supply, an inverter that converts DC power from this rectifier into AC power, Switches and ancillary equipment including electric equipment such as an electric control device that controls the operation of the power supply equipment. The ancillary equipment except for the storage battery group 2 is housed in a first housing 1 composed of a cubic small room (called a cubicle), and the storage battery group 2 is stored in a second housing 3 also formed of a cubic small room. Will be relocated to Both housings 1 and 3 are installed adjacent to each other at a predetermined installation location such as a machine room.

The first housing 1 has an inlet 4 and an outlet 6
Is provided on the outer surface plate, the suction port 4 is provided, for example, at a lower portion of the side plate opposite to the second housing 3, and the discharge port 6 is provided, for example, on the upper surface plate. The cooling air fan 8, which is provided at a position close to the second housing 3 and is disposed in the housing 1, is driven by the cooling air fan 8 to cool the outside air necessary for cooling the internal electric equipment. Is sucked from the suction port 4 to cool the electric device, and then is discharged from the discharge port 6 to the outside of the housing 1. The discharge port 6 is provided with a damper 7 as an air volume adjusting means for adjusting the amount of gas to be released.

A discharge port 12 is provided in the second housing 3 with an opening. For example, the discharge port 12 is provided at a position on the top plate far from the first housing 1 and is provided in the opening. A damper 11 is provided as an air volume adjusting means. This outlet 12
Is used for ventilating the inside of the housing 3 by adjusting the damper 11 when the temperature inside the housing 3 rises or the humidity rises.

Further, a cooling air duct 5 as a first communication passage and a cooling air duct 13 as a second communication passage are provided between the first housing 1 and the second housing 3. , Both housings 1, 3
It is provided to span. The cooling air duct 5 connects the inflow side end to an opening provided in an upper portion of the side plate facing the second housing 3 of the side plate of the first housing 1. The outflow side end port is connected to an opening provided in a lower portion of the side plate facing the first housing 1 of the side plates of the housing 3, and is provided from the first housing 1 to the second housing. 3 is designed to guide gas. The cooling air duct 5 includes:
A damper 9 as an air volume adjusting means is interposed. For example, a damper 9 is provided at a location near the outlet end to adjust the amount of gas guided to the second housing 3.

On the other hand, the cooling air duct 13 flows into an opening provided at a lower portion of the side plate of the second housing 3 which faces the side plate to which the cooling air duct 5 is connected. The outlet is connected to an opening provided at a lower portion of the side plate of the first housing 1 where the suction port 4 is provided. Gas is led from the housing 1 to the second housing 3. The cooling air duct 13 has a damper 1 as an air volume adjusting means.
For example, a damper 10 is provided at a position near the inflow side end port so that the amount of gas returned to the first housing 1 can be adjusted.

As shown in FIG. 1, the uninterruptible power supply further includes a thermometer 14 and a control device 15 as temperature detecting means. The thermometer 14 is provided so as to measure the temperature (battery temperature) of the group of storage batteries 2 in the second housing 3 and output a temperature signal 17 corresponding to this temperature to the control device 15. On the other hand, the control device 15 is provided by constituting a part of the electric control device that controls the operation of the power supply equipment. The detected temperature signal is input to an input port, and the output port is A control signal 16, a control signal 19, and a storage battery state signal 18 are output. The control signal 16 is a control signal that is output to the dampers 9 and 10 to adjust the opening including the fully open and fully closed. The control signal 19 is output to the damper 7 and the opening that includes the fully opened and fully closed. The storage battery state signal 18 is supplied to the electric control device in the first housing 1 as information corresponding to the output of the storage battery 2 group. This is an information signal transmitted to the operation control system of the electric device.

The operation that characterizes the present invention in the uninterruptible power supply having the above-described configuration will be described below. The first housing 1 is driven by the cooling air fan 8 being driven.
Cooling air necessary for cooling the electric devices in the air is sucked from the suction port 4. After cooling the electric device, the cooling air is guided to the second housing 3 by the cooling air duct 5. Here, after the storage battery 2 group is warmed, it is discharged to the outside through the discharge port 12. This makes it possible to set the temperature of the storage battery 2 group to a predetermined temperature (lower limit) or higher, and the storage battery 2
The output from the group can be increased.

If the temperature of the gas for warming the storage battery group 2 is too high due to the high outside air temperature and the temperature of the heated storage battery group 2 is likely to be higher than a predetermined temperature (upper limit), the damper 9 is turned off. Close it, open damper 7 instead,
The temperature of the storage battery group 2 is prevented from rising abnormally.

Conversely, when the outside air temperature is low, the damper 10 is opened, and the gas in the second housing 3 is guided again to the first housing 1 to reduce the temperature of the gas in the cooling air duct 5. By raising the temperature, it is possible to raise the temperature of the storage battery 2 group.

When the temperature of the storage battery group 2 is low, the output of the storage battery group 2 decreases, which may adversely affect the operation of the electric equipment. Thus, a storage battery state signal 1 representing the state of the storage battery 2 group
By feeding back 8 to the operation control system of the electric equipment to which the output of the storage battery 2 is supplied, it is possible to take measures in advance on the electric equipment side. The thermometer 14
May be a thermocouple, a hydrometer, or other instruments as long as they can monitor the state of the storage battery 2 group. Also, each damper 7,
Regarding 9, 10, and 11, any of those capable of simple open / close control such as an electromagnetic on-off valve and the like and those capable of continuous control such as a flow control valve may be used.

The general characteristics of the storage battery 2 are, as is clear from the storage capacity-battery temperature relationship graph shown in FIG. 2, the storage battery capacity (equivalent to output) greatly depends on the battery temperature. Therefore, for example, when the capacity is designed at 25 ° C., when the temperature becomes 0 ° C., the capacity decreases as illustrated,
In many cases, sufficient output cannot be obtained. On the other hand, if the temperature corresponding to the capacity required for the storage battery (25 ° C. in the above example) can be maintained, it is possible to minimize the use of a storage battery that allows for a surplus in the capacity as in the prior art. It is possible to use a small storage battery having a necessary capacity, and it is possible to expect miniaturization and high economic efficiency as uninterruptible power supply equipment.

In the first embodiment of the present invention described above, the opening of the damper 9 is adjusted based on the temperature signal 17 (temperature of the storage battery 2) to adjust the amount of gas introduced to the storage battery 2 side. However, instead of the temperature signal 17, a temperature signal corresponding to the temperature of the gas flowing through the cooling air duct 5 is adopted as a detection signal, and the damper adjustment is performed by the detection signal. It may be what you did.

FIGS. 3 to 5 show schematic diagrams of uninterruptible power supply equipment according to the second to fourth embodiments of the present invention.
In the second embodiment shown in FIG. 3, the first housing 1 in which the auxiliary equipment except for the storage battery 2 is housed and the second housing in which the storage battery 2 is housed.
This is an example in which the housing 3 is installed side by side.
In the third embodiment shown in FIG. 4, the second housing 3 in which the storage battery 2 is housed is built in the internal space of the first housing 1 in which the auxiliary equipment except the storage battery 2 is housed. In both cases, the cooling air duct is not used, and an opening is provided in a partition plate portion for partitioning the two housings 1 and 2, and a damper 9 is provided in the opening. Has formed.

With such a structure, the gas warmed by the heat generated on the electric device side is naturally guided to the storage battery 2 side through the opening provided with the damper 9, Thereby, the temperature of the storage battery 2 can be maintained at a predetermined temperature.

In a fourth embodiment shown in FIG. 5, an engine is provided separately from a first housing 1 in which ancillary equipment such as electric equipment is housed and a second housing 3 in which a storage battery 2 is housed. The device cubicle 20 in which other devices such as
And a duct 21 for guiding gas from the device cubicle 20 to the second housing 3 is provided between the housing 3 and the device cubicle 20. In addition, a heat source for warming the storage battery 2 is obtained from a housing other than the first housing 1. In such an embodiment, the temperature of the storage battery 2 group in the second housing 3 can be maintained at a predetermined temperature, as in the first to fourth embodiments.

Although the embodiments have been described above, in the present invention, the first housing 1 in which the storage battery 2 is housed may be a space such as a storage battery room. Also,
The electric device and the storage battery 2 may be structured such that they are housed separately in one housing.

[0029]

The present invention is embodied in the form described above and has the following effects.

According to the first aspect of the present invention, the uninterruptible power supply is provided by guiding the gas heated by the auxiliary equipment except the storage battery to the storage battery and maintaining the temperature of the storage battery at a predetermined temperature. It is possible to maintain the capacity of the storage battery required as equipment.

According to the second aspect of the present invention, there is provided a temperature detecting means for detecting one of a temperature of a gas heated by ancillary equipment except the storage battery and a temperature of the storage battery, and a detected temperature signal of the temperature detecting means. Based on the above, the configuration provided with the air volume adjusting means for adjusting the amount of gas guided to the storage battery is provided, thereby accurately maintaining the temperature of the storage battery and stably maintaining the capacity of the storage battery required as an uninterruptible power supply facility. It becomes possible.

Further, according to the invention of claim 4, the first housing in which the incidental equipment is housed, the second housing in which the storage battery is housed, and the second housing from the first housing. A first communication passage for guiding gas to the second housing via the air volume adjusting means, and a second communication passage for returning gas from the second housing to the first housing. The first housing has a suction port and a discharge port through which gas can flow in and out, and the second housing has a discharge port through which gas can flow out. Even when the temperature is particularly low, the storage battery can be heated to a predetermined temperature (since the gas once warmed can be circulated).

According to the fifth aspect of the present invention, the temperature detecting means for detecting the temperature of the storage battery, and the output of the storage battery is supplied as the information corresponding to the output of the storage battery using the temperature signal detected by the temperature detecting means. By providing the information transmission means for transmitting to the operation control system of the electric equipment, when the temperature of the storage battery does not reach the predetermined value and the predetermined output cannot be maintained, the information is transmitted to the related electric equipment. Further, the safety can be further improved without causing the abnormal operation of the related electric equipment due to the insufficient output of the storage battery.

[Brief description of the drawings]

FIG. 1 is a schematic structural view showing an uninterruptible power supply system according to a first embodiment of the present invention.

FIG. 2 is a graph showing a relationship between a storage battery capacity of a storage battery and a battery temperature in the uninterruptible power supply system shown in FIG.

FIG. 3 is a schematic view of an arrangement of uninterruptible power supply equipment according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating an arrangement of uninterruptible power supply equipment according to a third embodiment of the present invention.

FIG. 5 is a schematic diagram illustrating an arrangement of uninterruptible power supply equipment according to a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st housing | casing 2 ... Storage battery 3
… Second housing 4… inlet port 5… cooling air duct 6
… Discharge port 7… Damper 8… Cooling fan 9
… Damper 10… Damper 11… Damper 1
2 ... discharge port 13 ... cooling air duct 14 ... thermometer 1
5 ... Control device 16 ... Control signal 17 ... Temperature signal 1
8: storage battery status signal 19: control signal 20: equipment cubicle 2
1 ... duct

Claims (5)

[Claims] 1. An uninterruptible power supply having at least a storage battery as a power supply, wherein gas heated by auxiliary equipment except the storage battery is guided to the storage battery, and the temperature of the storage battery can be maintained at a predetermined temperature. Uninterruptible power supply equipment. 2. A temperature detecting means for detecting one of a temperature of a gas heated by ancillary equipment other than the storage battery and a temperature of the storage battery, and a guide to the storage battery based on a temperature signal detected by the temperature detection means. The uninterruptible power supply system according to claim 1, further comprising an air volume adjusting means for adjusting an amount of gas. 3. The uninterruptible power supply according to claim 2, wherein said storage battery and auxiliary equipment excluding said storage battery are housed in different housings. 4. A first housing in which ancillary equipment other than the storage battery is housed, a second housing in which the storage battery is housed,
A first communication path for guiding gas from the first housing to the second housing via the air volume adjusting means, and returning gas from the second housing to the first housing. A second communication path, a suction port and a discharge port through which gas can flow in and out of the first housing, and a discharge port through which gas can flow out are provided in the second housing. The uninterruptible power supply system according to claim 2, comprising: 5. A temperature detecting means for detecting a temperature of the storage battery, and a detected temperature signal of the temperature detecting means is transmitted as information corresponding to the output of the storage battery to an operation control system of an electric device to which the output of the storage battery is supplied. 3. The uninterruptible power supply according to claim 2, further comprising information transmission means.