JPH11162433A - Oil-dipped storage battery device and its operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-dipped storage battery device capable of easily compensating the pressure difference between the inside and the outside of a storage tank storing storage batteries and capable of easily removing the gas retained in an electrode group during an electric charge and to provide its operating method. SOLUTION: This oil-dipped storage battery device 10 storing storage batteries 12 in a storage tank 11 is provided with a storage container 20 storing part of electric insulating oil in the storage tank 11 and a pressure source 30 for applying pressure to the storage tank 11 or the storage container 20. When the electric insulating oil is to be injected into the storage tank 11, the pressure source 30 is connected to the storage container 20. When the electric insulating oil is to be injected into the storage container 20, the pressure source 30 is connected to the storage tank 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-immersed storage battery device and a method of operating the same. More specifically, the present invention is used as a power source for a submarine rescue boat, a diving survey boat, a diving work robot, and the like. In an oil-immersed storage battery to compensate for the pressure difference between the inside of the storage tank and the outside of the storage tank,
A mechanism for injecting electric insulating oil into the storage tank and a mechanism for facilitating the necessary operations when charging the storage battery and facilitating the removal of air bubbles due to gas generated in the electrode group during charging. The present invention relates to a configuration in which a mechanism for discharging electric insulating oil is improved.

[0002]

2. Description of the Related Art In recent years, with the progress of marine development, large submarine rescue boats, diving survey boats, diving work robots, and the like, which can meet the demand for deeper diving and longer dive time, have been introduced. Accordingly, it is indispensable for an oil-immersed storage battery used for the power supply to meet such a demand.

[0003] That is, large submarine rescue boats, diving survey boats, submersible work robots, and the like are equipped with a large-capacity oil-immersed storage battery in order to increase the power supply, and inside and outside the storage tank containing the storage battery. In order to compensate for the pressure difference between the tank and the storage tank, a large amount of electric insulating oil is held in the storage tank, and the electric insulating oil is discharged from the tank or injected into the tank according to a change in pressure outside the tank. A mechanism is required.

[0004] Japanese Patent Application Laid-Open No. 6-44023 discloses a device capable of coping with the above-mentioned applications.

That is, what is described in the above publication is
It is composed of a storage tank containing a storage battery provided with an electric insulating oil oil passage at the lower part, and a flexible hose filled with electric insulating oil. By moving the electric insulating oil in the hose, the pressure difference between the inside of the storage tank and the outside of the tank is balanced.

[0006]

However, according to the above-mentioned publication, when charging a discharged oil-immersed storage battery, gas bubbles are generated in the electrode plate group of the storage battery, and the electricity in the storage tank is reduced. Since the apparent volume of the insulating oil increases and the electric insulating oil leaks, it is necessary to lower the oil level during charging. For this reason, if the electric insulating oil is moved from the storage tank into the hose, a large hose must be mounted if a large amount of electric insulating oil is to be moved. There has been a problem that operations such as switching valves due to the movement of the electric insulating oil in the tank become complicated, and that it becomes difficult to secure a space for accommodating a hose.

[0007] When the installed hose is small, the oil level of the electric insulating oil is high, so that the electric insulating oil may overflow from the open portion above the storage tank.

Further, in any case, even after the charging is completed, gas bubbles in the electrode group do not escape and tend to stay in the electrode group, which not only causes a decrease in the performance of the storage battery, but also in a severe case. However, there is a problem that the storage battery is damaged.

In order to solve the above-mentioned problem, there is a method of transferring the electric insulating oil from the storage tank to another container by a pump. However, after charging is completed, the gas remaining in the electrode plate group can be sufficiently removed. At present, it is difficult to solve the above problem completely.

[0010]

According to a first aspect of the present invention, a storage battery is stored in a storage tank, and an electrical insulating oil is held in the storage tank, and the electrical insulation in the storage tank is maintained. An oil-immersed storage battery having a mechanism for adjusting the volume of oil, a storage container for storing a part of the electrically insulating oil in the storage tank, and a pressurizing source for applying pressure to the container or the storage tank. And the first configuration or the pressure source is connected to a storage container so that the pressurizing source is connected to a storage tank, and electrical insulating oil is sent from the storage tank to the storage container. An oil-immersed storage battery device having a second configuration in which electric insulating oil is sent from a storage container to a storage tank, whereby the electric insulating oil in the storage container is stored in the storage container. From the storage tank and the electrical insulating oil in the storage tank into the storage tank. Configuration and which can be easily realized.

According to a second aspect of the present invention, in the oil-immersed storage battery device of the first aspect, the storage tank has a vent plug for ventilating the inside and outside of the tank, and an electric insulating oil is injected into the tank. An oil tap for discharging electric insulating oil from the tank, wherein the storage container has a shut-off valve that opens only in a direction to discharge the electric insulating oil in the storage container into the storage tank. A stopper, a lubrication stopper for injecting the electric insulating oil in the storage tank into the storage container, and a pressure stopper for pressurizing the storage container,
An air tap having a shut-off valve that opens only in the direction of injecting the exhaust gas in the storage tank.The pressurizing source is connected to a vent plug, and the oil tap and the oil tap are connected. First
And connecting the pressure source to a pressure tap,
It is characterized in that it comprises a second configuration in which an air supply plug and a ventilation plug are connected, and an oil supply plug and an injection / discharge oil plug are connected,
This makes it possible to easily realize a configuration in which the electric insulating oil is sent from the storage tank into the storage container and a configuration in which the electrical insulating oil is sent from the storage container into the storage tank by operating a valve.

According to a third aspect of the present invention, in the oil-immersed storage battery device according to the second aspect, the opening position of the conduit in the storage tank leading to the oil filling / discharging plug is lower than the opening position of the gas-liquid separator of the storage battery. It is characterized in that it is higher than the position of the connecting conductors connecting the storage batteries to each other, so that when the storage batteries are charged, the surroundings of the connecting conductors between the storage batteries are easily filled with the electric insulating oil to a certain level. State.

According to a fourth aspect of the present invention, in the oil-immersed storage battery device according to the third aspect, the opening of the conduit in the storage tank leading to the filling / discharging oil stopper is located near the center of the storage battery arranged in the storage tank. When the electric insulating oil is delivered from the storage tank to the storage container, the amount of the electric insulating oil delivered is kept constant even if the device is tilted or shaken. can do.

According to a fifth aspect of the present invention, the oil-immersed storage battery device of the second aspect has a first configuration, and the electric insulating oil in the storage tank is kept at a constant liquid level by the pressure of the gas from the pressurizing source. This is a method of operating an oil-immersed storage battery device characterized in that the oil level is sent out to a storage container until the oil level reaches a predetermined level, whereby the oil level can be lowered to a predetermined level by a simple valve operation without using a pump. it can.

According to a sixth aspect of the present invention, the oil-immersed storage battery device according to the second aspect has a second configuration, and the closing valve of the oil feed plug is opened to store the electric insulating oil in the storage container in the storage tank. And applying a pressurization and normal pressure release or pressure fluctuation by a pressurization source, and then operating the oil-immersed storage battery device, characterized by closing the shut-off valve.
The storage tank can be filled with the electric insulating oil by a simple valve operation, and the gas accumulated in the electrode group can be removed in a short time.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on its embodiments.

The first configuration of the oil-immersed storage battery device according to the embodiment of the present invention is characterized in that, as shown in FIG.
A storage container 20 for storing a part of the electric insulating oil 13 in the storage tank 11, and a pressurizing source 30 for applying pressure to the storage tank 11.
The pressurizing source 30 is connected to the storage tank 11 so that the electric insulating oil in the storage tank 11 is sent out to the storage container 20.

In the first configuration described above, if the inside of the storage tank 11 is pressurized by the pressurizing source 30, the electric insulating oil in the storage tank 11 can be sent out to the storage container 20.

The characteristic of the second configuration of the oil-immersed storage battery device according to the embodiment of the present invention is as shown in FIG.
The storage container 20 and the pressurizing source 30 are attached to the oil-immersed storage battery 10, and the pressurizing source 30 is connected to the storage container 20 so that the electric insulating oil in the storage container 20 is discharged into the storage tank 11. It was done.

In the above-described second configuration, if the inside of the storage container 20 is pressurized by the pressurizing source 30, the electric insulating oil in the storage container 20 can be sent out into the storage tank 11 and released under normal pressure. If it is, the gas staying in the electrode group can be removed from the storage tank 11.

On the other hand, the feature of the operation method of the oil-immersed storage battery device according to the embodiment of the present invention is that the discharged oil-immersed storage battery 1
When charging 0, gas bubbles are generated in the electrode group of the storage battery 12 during charging, and the apparent electrolyte level of the storage battery 12 rises. 11 and into the storage container 20, and after charging is completed, gas remaining in the electrode group during charging is removed, and the electric insulating oil is returned from the storage container 20 into the storage tank 11. is there. Needless to say, during charging, the position of the valve or the piping is set so that the generated gas is released to the atmosphere.

That is, an oil-immersed storage battery 10 in which a storage battery 12 is stored in a storage tank 11 has a storage container 20 for storing a part of the electric insulating oil in the storage tank 11, In an oil-immersed storage battery device provided with a pressurizing source 30 for applying pressure to the storage tank 11, if the storage tank 11 is pressurized by the pressurizing source 30, the storage tank 1
1, the electric insulating oil can be sent into the storage container 20 from the inside, and if the inside of the storage container 20 is pressurized by the pressurizing source 30, the electric insulating oil can be sent from the storage container 20 to the storage tank 11. In addition, if pressurization and normal pressure release are repeatedly applied to the inside of the storage container 20, bubbles caused by gas remaining in the electrode plate group during charging can be easily removed.
As a result, the gas remaining in the electrode group that could not be removed by the operation of sending the electrical insulating oil from the storage tank 11 into the storage vessel 20 using the pump or from the storage vessel 20 to the storage tank 11 was removed. Air bubbles can be easily removed.

[0023]

Next, an embodiment of the first configuration of the above-described oil-immersed storage battery device will be described with reference to FIG. 2, an embodiment of the second configuration with reference to FIG. 4, and an embodiment of an operation method thereof.

That is, as an embodiment of the first configuration,
As shown in FIG. 2, the storage tank 11 has a ventilation plug 111 for ventilating the inside and outside of the tank 11 and injecting or discharging electric insulating oil into or from the tank 11. The storage container 20 has a circulation function only in the direction of the arrow in FIG. 2, and is provided in a direction in which the electric insulating oil in the storage container 20 is sent into the storage tank 11. An oil tap 201 having a shut-off valve 201 ′ that only opens,
A lubrication plug 202 for injecting the electric insulating oil in the storage tank 11 into the storage container 20, a pressure plug 203 for pressurizing the storage container 20, and a note having a distribution function only in the direction of the arrow in FIG. A pressurizing source 30 is connected to the vent plug 111 of the storage tank 11,
Oil plug 202 of storage container 20 and oil plug 1 of storage tank 11
12 are connected.

In the first embodiment described above, the operation is performed such that the pressurizing source 30 pressurizes the inside of the storage tank 11 and discharges the electric insulating oil from the storage tank 11 into the storage container 20. One operation method is to do so.

As an example of the second configuration, FIG.
As shown in FIG. 7, the pressurizing source 30 is connected to the pressurizing plug 203, and the oil feed plug 201 and the injection / discharge oil plug 112 are connected.

In the second embodiment, the closing valve 201 'is opened, and the pressure source 30
The inside of the storage container 20 is pressurized so that the storage tank 1
Another operation method is to operate so as to discharge the electric insulating oil into the inside of the apparatus.

In this operation method, the exhaust gas from the storage tank 11 may be directly discharged to the atmosphere. Oil may be fed into the storage tank 11 by repeating normal pressure release, and the exhaust gas from the storage tank 11 may be discharged to the atmosphere via the storage container 20. By collecting a small amount of the discharged electric insulating oil in a small container (not shown), the oil can be quickly supplied. In the latter case, the electric insulating oil is filled in the storage tank 11 after charging is completed. By repeating the pressurization and the normal pressure release in the storage container 20 in a state where the gas inlet plug 204 and the exhaust plug 111 are connected, the gas remaining in the electrode group of the storage battery 12 is transferred into the storage container 20. Can be guided and released into the atmosphere.

In the above-described embodiment of the second configuration, the oil feed plug 201 and the air feed plug 204 are one-way valves having a flow function only in the direction of the arrow in FIG.
Is the storage container 20 with the closing valve 201 ′ opened.
This is to prevent the electric insulating oil from flowing back into the storage container 20 via the oil pouring / discharging plug 112 when the inside is at normal pressure. This is to prevent the insulating oil from being sent into the storage tank 11 through the ventilation plug 111. If the position of the storage container 20 is higher than the position of the storage tank 11,
1 does not necessarily have to have the function described above. In this case, even if the inside of the storage container 20 is not pressurized, if the exhaust gas from the ventilation plug 111 is discharged to the atmosphere, the closing valve 2
Electric insulation oil can be injected into the storage tank 11 only by opening 01 '.

In the embodiments of the above-described configurations,
The position of the opening of the oil drain plug 112 in the storage tank 11 is
Is lower than the position of the opening of the gas-liquid separator 121 and higher than the position of the connecting conductor for interconnecting the storage batteries 12 (not shown). To a certain level around the connection conductor between the storage batteries 12 so that the oil is filled with the oil.

The pressurizing source 30 may be a gas high-pressure cylinder other than a compressor. In this case, no special power is required.

[0032]

As described above, the invention described in each claim is
In an oil-immersed storage battery device capable of compensating for a pressure difference between the inside of the storage tank containing the storage battery and the outside of the storage tank, gas remaining in the electrode group during charging can be easily removed. This is particularly effective in avoiding the problem caused by the above, and greatly contributes to the improvement of reliability in realizing a large-capacity oil-immersed storage battery device.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of the first configuration.

FIG. 3 is a diagram for explaining a second configuration of the device according to the embodiment of the present invention.

FIG. 4 is a diagram showing an embodiment of the second configuration.

[Explanation of symbols]

 Reference Signs List 10 oil-immersed storage battery 20 storage container 30 pressure source

Claims (6)

[Claims] 1. An oil-immersed storage battery having a mechanism for storing a storage battery in a storage tank, holding electric insulating oil in the storage tank, and adjusting a volume of the electric insulating oil in the storage tank, A storage container in which a part of the electric insulating oil is stored, and a pressurizing source for applying pressure in the container or the storage tank; connecting the pressurizing source to the storage tank; Or the first configuration in which the pressure source is connected to the storage container so that the electric insulating oil is discharged from the storage container into the storage container. An oil-immersed storage battery device having the following configuration. 2. The oil-immersed storage battery device according to claim 1, wherein the storage tank has a vent plug for ventilating the inside and outside of the tank, and electrically insulating oil is injected into the tank or electrically insulated from the inside of the tank. A storage container, wherein the storage container is provided with a shut-off valve that opens only in a direction in which the electric insulating oil in the storage container is discharged into the storage tank; A lubrication plug for injecting the electric insulating oil into the storage container, a pressurization plug for pressurizing the storage container, and a pneumatic stopper having a close valve that opens only in the direction of injecting exhaust gas from the storage tank. A first configuration in which the pressurizing source is connected to a vent plug and a lubricating plug and a lubricating and draining plug are connected or the pressurizing source is connected to a pressurizing plug, and An oil having a second configuration in which a plug and a vent plug are connected, and an oil feed plug and an injection / discharge oil plug are connected. Pickled storage battery device. 3. The oil-immersed storage battery device according to claim 2, wherein an opening position of a conduit in the storage tank leading to the oil filling / discharging plug is lower than an opening position of the gas-liquid separator of the storage battery, and a connection for connecting the storage batteries to each other. An oil-immersed storage battery device characterized by being higher than a conductor. 4. An oil-immersed storage battery device according to claim 3, wherein an opening of a conduit in the storage tank leading to the oil filling / discharging plug is provided near the center of the storage batteries arranged in the storage tank. Oil-immersed storage battery device. 5. The oil-immersed storage battery device according to claim 2, wherein
The operation method of an oil-immersed storage battery device, wherein electric insulating oil in a storage tank is sent out into a storage container until the liquid level reaches a certain level by the pressure of gas from a pressurized source. 6. An oil-immersed storage battery device according to claim 2,
And, while opening the shut-off valve of the oil tap and sending out the electrical insulating oil in the storage container into the storage tank, and applying a pressurization and normal pressure release or pressure fluctuation by the pressurizing source, A method for operating an oil-immersed storage battery device, comprising closing a closing valve.