JP2001110380A - Oil-immersed battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an oil-immersed battery that can contribute to capacity expansion without weight increase. SOLUTION: This is equipped with a battery housing bath 1 that contains a plurality of unit cells 10 and tightly sealed with a lid 9, a pressure equalizer 2 that compensates pressure difference between interior and exterior by letting insulation oil filled inside flow into or out of the battery housing bath 1, and a cover 6 that encloses this pressure equalizer 2, and at least one of the battery housing bath 1, lid 9 and cover 6 is constructed with a metal plate of honeycomb structure sandwiched with metallic plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-immersed battery, and more particularly, to a main power supply for deep-sea equipment, a diving survey boat, a diving work robot, and the like, and instruments and communication equipment mounted thereon. The present invention relates to increasing the capacity of an oil-immersed battery that is used as an emergency power source and that compensates for internal and external pressure differences by flowing electrical insulating oil into or out of the battery storage tank against changes in external pressure. .

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for deep-sea equipment, diving survey vessels, diving work robots, and the like, with increasing diving depth and prolonging diving time. There is an increasing demand for large capacity batteries as emergency power supplies for communication devices.

[0003] Of the equipment mounted on the above-mentioned deep-sea equipment, diving survey boats, diving work robots, etc., batteries occupy 10 to 30% of the total drainage. Therefore, equipment other than batteries is housed in a pressure-resistant shell. Then, the battery is stored in a separately provided battery storage tank, and electric insulation oil flows into the battery storage tank or discharges the electric insulating oil from the battery storage tank in response to a change in external pressure to compensate for a pressure difference between the inside and the outside. , With an oil-immersed battery.

[0004] As shown in FIG. 3, such an oil-immersed battery is provided in a battery storage tank 1 in which a plurality of unit cells 10 are connected in series or in parallel and stored, and below the battery storage tank 1. A pressure equalizing device 2 that flows into or out of the battery storage tank 1 to compensate for a pressure difference between the inside and the outside, and that the pressure equalizing device 2 A bottom plate provided with a cover 6 for encapsulation, the upper portion of the battery storage tank 1 sealed with a lid 9 provided with a gas vent plug 11, and a bottom portion provided with an oil passage hole 3 for mounting a plurality of cells 10; 4, the cover 6 is provided with a seawater circulation hole 8 and has a structure in which the battery storage tank 1 and the pressure equalizer 2 are connected by bolts 5 inserted into an upper flange portion 7. ing.

The above-mentioned oil-immersed type battery is equipped with a pressure equalizer through a seawater flow hole 8 of a cover 6 when a deep-sea equipment, a diving survey boat, a diving work robot, etc., on which the oil-immersed type battery is mounted, when the water pressure increases with diving. 2 is compressed, the electric insulating oil moves into the battery storage tank 1 through the oil passage hole 3, compresses the gas remaining in the battery storage tank 1, and the compressed gas passes through the vent plug 11. When it is released outside and the water pressure decreases as it rises,
The gas in the battery storage tank 1 expands and the electric insulating oil flows through the oil passage hole 3.
This is a structure that compensates for a pressure difference between the inside and outside by flowing out of the battery storage tank 1 through the battery housing 1.

[0006]

In the above-mentioned conventional oil-immersed type battery, the deep-sea equipment, diving survey boat, diving work robot and the like on which it is mounted are required to have a deeper diving depth and a longer diving time. In order to cope with this, it is necessary to make the battery storage tank 1, the lid 9 and the cover 6 strong enough to withstand the weight and water pressure of the battery. However, the conventional oil-immersed type battery uses a solid plate for these. However, there is a problem that the weight increases.

[0007]

In order to solve the above-mentioned problems, the invention according to the first aspect is characterized in that a plurality of unit cells are connected and stored in series or in parallel, and a battery storage tank sealed with a lid, It has a pressure equalizing device that compensates for the pressure difference between the inside and outside by injecting or flowing out the electric insulating oil filled inside into the battery housing against the change, and a cover that covers the pressure equalizing device. In the oil-immersed battery, at least one of the battery storage tank, the lid, and the cover has a structure including a metal plate having a honeycomb structure and metal flat plates disposed on both surfaces of the metal plate having the honeycomb structure. Thereby, the strength can be improved without increasing the weight of the battery storage tank, the lid, and the cover.

According to a second aspect of the present invention, in the oil-immersed battery according to the first aspect, the honeycomb structured metal plate is filled with a resin having a specific gravity of 1.0 or less in its space. Therefore, the strength of the cover can be further increased.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

FIG. 1 is a sectional view of an oil-immersed battery according to an embodiment of the present invention.

An oil-immersed battery according to an embodiment of the present invention is characterized in that a plurality of cells 10 are connected in series or in parallel and stored, and a battery storage tank 1 sealed with a lid 9 and a battery storage tank 1. A pressure equalizing device 2 provided at a lower portion of the battery pack for compensating a pressure difference between the inside and the outside by flowing an electric insulating oil filled in or flowing out of the battery housing tank 1 in response to a change in external pressure. And a cover 6 enclosing the pressure equalizing device 2, wherein the battery storage tank 1, the lid 9 or the cover 6
At least one of them has a structure including a honeycomb-structured metal plate and metal flat plates disposed on both sides of the honeycomb-structured metal plate.

A metal plate having a honeycomb structure used for the battery storage tank 1, the lid 9 or the cover 6 has a plane shown in FIG.
The resin 41 having a specific gravity of 1.0 or less in the space having the shape as shown in FIG. 2A or in the space of the honeycomb structure shown in FIG.
The material is preferably an aluminum alloy or a titanium alloy that is lightweight and has high strength, and the latter can have higher strength than the former. Also, the material of the above-mentioned metal flat plate is preferably an aluminum alloy or a titanium alloy which is lightweight and has high strength.

The battery storage tank 1 having the above-described structure, the pressure equalizing device 2
Has a structure in which the inside is hermetically sealed by bolts 5 inserted into the lid 9 and the flange portion 7. The pressure equalizing device 2 is provided at the lower portion of the battery storage tank 1, but may be provided on the side of the battery storage tank 1. .

[0014]

As described above, the oil-immersed battery of the present invention has
Since at least one of the battery storage tank, the lid or the cover has a structure including a metal plate having a honeycomb structure and metal flat plates arranged on both surfaces of the metal plate having the honeycomb structure,
The strength can be improved without increasing the weight of the battery storage tank, the lid or the cover, which can contribute to an increase in capacity.

[Brief description of the drawings]

FIG. 1 is a sectional view of an oil-immersed battery according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of a metal plate having a honeycomb structure used for a battery storage tank, a lid or a cover of the oil-immersed type battery of FIG.

FIG. 3 is a cross-sectional view of a conventional oil-immersed battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery storage tank 2 Equalizing device 3 Oil passage 6 Cover 8 Seawater circulation hole 9 Lid 10 Cell 11 Gas vent plug

Claims (2)

[Claims] 1. A plurality of unit cells connected and stored in series or in parallel and stored therein, and a battery storage tank sealed with a lid, and an electric insulating oil filled therein in response to a change in external pressure flows into or from the battery storage tank. In an oil-immersed battery having a pressure equalizing device that flows out of a battery storage tank to compensate for a pressure difference between the inside and the outside, and a cover that encloses the pressure equalizing device, at least one of the battery storage tank, a lid, and a cover includes a honeycomb. A metal plate with a structure,
An oil-immersed battery comprising a metal plate having a honeycomb structure and metal flat plates disposed on both sides of the honeycomb structure. 2. The oil-immersed battery according to claim 1, wherein the metal plate having the honeycomb structure has a space filled with a resin having a specific gravity of 1.0 or less.