JPH11260393A - Anode absorbing type sealed storage battery and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anode absorbing type sealed storage battery, capable of preventing drop in characteristic frequency. SOLUTION: A filler 4 for filling a gap 3 so as to follow the recessed shape on the surface of a battery container 1 is filled in the gap 3 between the battery container 1, into which a power generating element is housed and an outer box 2. In an absorbing type storage battery, the gap 3 between the battery container 1 and the outer box 2 having stiffness is filled with the filler 4 filling the gap 3 to follow the recessed shape on the surface of the battery container, and the filler 4 is solidified, and thereby the drop in characteristic frequency can be prevented as a whole, and aseismatic property is enhanced. Especially, through the use of the filler 4, the gap 3 with a narrow inlet and wide depth between the battery container 1 and the outer box 2 can be filled easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed cathode absorption type storage battery such as a stationary cathode absorption type sealed lead storage battery and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a stationary cathode-absorption type sealed lead-acid battery has a structure in which a power generating element is housed in a relatively rigid resin battery container (container) such as ABS. An example in which a resin such as polypropylene is used for a battery container (container) has begun to appear. When such a resin battery container is used, the rigidity of the battery container is insufficient, so that the battery container may be housed in an outer box having rigidity such as iron.

[0003]

However, in the cathode absorption type sealed storage battery, oxygen in the air confined in the battery container is consumed by the cathode absorption reaction after the battery container is sealed, and the battery is not used. The inside of the container becomes negative pressure,
In the case of a battery container made of a resin such as polypropylene that can be deformed by pressure, the outer surface of the battery container is generally concavely deformed, and a gap is usually formed between the outer box and the battery container. In this case, there is no particular problem in the performance of the storage battery, but the natural frequency as a whole may decrease, and a problem may occur in the earthquake resistance.

An object of the present invention is to provide a cathode absorption type sealed storage battery which can prevent a natural frequency from lowering, and a method of manufacturing the same.

[0005]

SUMMARY OF THE INVENTION The present invention is to improve a cathode absorption type sealed storage battery having a structure in which a battery case containing a power generation element is housed in a rigid outer box.

In the cathode absorption type sealed storage battery according to the present invention, the gap between the battery case and the outer case is filled in a solid state with a filler filling the gap according to the concave shape of the surface of the battery case. Have been.

In this case, the gap between the battery case and the rigid outer case is filled with the solid-state filler in accordance with the concave shape of the surface of the battery case. A fall can be prevented and seismic resistance can be improved. In particular, according to the filler, the gap between the pond container and the outer box having a narrow entrance and a large depth can be easily filled.

Further, the present invention is to improve a method of manufacturing a sealed cathode absorption type storage battery in which a battery container housing a power generation element is housed in a rigid outer box.

In the method for manufacturing a cathode absorption type sealed storage battery according to the present invention, after the deformation of the battery container almost reaches saturation due to a negative pressure inside due to the cathode absorption reaction after the battery container is sealed. The gap between the battery container and the outer box is filled with a filler filling the gap according to the concave shape of the surface of the battery container. In this case, the battery container accommodating the power generating element may be incorporated into the outer case after the deformation of the battery container has substantially reached saturation, or may be incorporated before the deformation of the battery container has substantially reached saturation.

With this configuration, when the gap between the battery container and the rigid outer box is maximized and is in a stable state, the gap is filled with the filler, so that the battery container is surely provided. The gap between the battery case and the outer case can be filled with the filler in accordance with the concave shape of the surface of the battery container. In particular, according to the filler, the gap between the pond container and the outer box having a narrow entrance and a large depth can be easily filled by using the fluidity of the filler.

[0011]

FIG. 1 is a cross-sectional view of an embodiment of a stationary cathode-absorption type sealed lead-acid battery to which the present invention is applied, omitting an internal structure.

In this cathode absorption type lead storage battery of the cathode absorption type, a battery container 1 made of polypropylene and formed of a battery case containing a power generation element (not shown) and deformable by internal pressure is placed in a rigid iron outer box 2. It is stored. In the gap 3 between the battery case 1 and the outer case 2 deformed by the internal pressure (negative pressure), a filler 4 made of a thermosetting resin such as an epoxy resin follows the concave shape of the surface of the battery case 1. The gap 3 is filled and filled. In this case, the battery main body 5 is formed by the power generation element and the battery container 1 that houses the power generation element.

In such a cathode absorption type lead-acid battery of the cathode absorption type, the gap 3 between the battery case 1 deformed by the internal pressure (negative pressure) and the rigid outer case 2 has a concave shape on the surface of the battery case 1. Therefore, the natural frequency can be prevented from lowering as a whole, and the earthquake resistance can be improved.

The production of such a cathode absorption type sealed lead-acid battery is performed as follows. In the battery case 1 made of polypropylene housing the power generation element, the inside of the battery case 5 becomes negative pressure by the cathode absorption reaction after the battery body 5 is manufactured and the battery case 1 is sealed, and the stacking direction of the electrode group (up and down in the figure) Direction) so that the side surface is concave inward. When the battery case 1 containing the power generating element is housed in a rigid outer case 2 made of iron, a gap 3 is formed between the battery case 1 and the outer case 2. Alternatively, if the battery container 1 is housed in the outer box 2 before the cathode absorption reaction proceeds, the cathode absorption reaction proceeds in the battery container 1 in the outer box 2 and the battery container 1 and the outer box 2 A gap 3 is generated between them. After the deformation of the battery case 1 due to the negative pressure inside the battery case 1 due to the cathode absorption reaction has substantially reached saturation, each gap 3 between the battery case 1 and the outer case 2
Next, a filling material 4 made of an epoxy resin is filled by a nozzle in a state of having fluidity before being cured to fill each gap 3. In this state, the filler 4 is cured at room temperature.

In this way, when the gap 3 between the battery case 1 deformed by the internal negative pressure and the rigid outer box 2 is maximized and is in a stable state, the gap 3 has fluidity. The filler 4 is filled according to the shape of the gap 3, so that the gap 3 between the battery container 1 and the outer box 2 can be reliably filled with the filler 4.

In order to verify the effects of the present invention, a cathode absorption type sealed lead-acid battery was prototyped, and its natural frequency was measured. The prototype battery uses a battery case 1 made of polypropylene, and the dimensions of the battery case 1 when placed horizontally so that the electrode plates of the power generation element are horizontal are about 14 cm in width and about 50 c in depth.
m, a height of about 40 cm and a capacity of 1500 Ah. The battery containers 1 were housed in an outer case 2 made of iron, stacked as single cells in two rows and four rows, and the natural frequency was measured.

As an example of the present invention, on the seventh day after the production of the battery main body 5 comprising the battery container 1 containing the power generating element, the outer box 1
Filler 4 made of epoxy resin in gap 3 between battery container 1 and
Was used. Also, as a comparative example 1, a battery main body 5 immediately after manufacturing, comprising a battery case 1 containing a power generation element.
And a battery body 5 comprising a battery container 1 containing a power generating element as Comparative Example 2
On the day, the gap 3 between the battery container 1 and the outer box 1 was not filled with the filler 4.

[0018]

[Table 1] Table 1 shows the measurement results of the natural frequency. 7 days after production (Comparative Example 2) compared to that immediately after production (Comparative Example 1)
Clearly has a lower natural frequency. On the other hand, it can be seen that the device of the present invention has a higher natural frequency than that of Comparative Example 1.

In the above example, an example in which an epoxy resin is used as the filler 4 has been described. However, the present invention is not limited to this, and a fluid thermosetting resin is injected into the gap 3 with a nozzle together with air. Or a method of filling the flakes of an expandable foamed resin (a thermosetting resin in which high-pressure closed cells are confined) and then expanding it by heating to fill the gaps 3, or a thermoplastic resin A method may be used in which the material is heated to a fluid state, filled and cooled and solidified.

The present invention is not limited to the above-described closed lead battery of the cathode absorption type, but can also be applied to a sealed alkaline storage battery of the cathode absorption type.

[0021]

As described above, in the sealed cathode absorption type storage battery according to the present invention, the gap between the battery container and the rigid outer box is formed by following the concave shape of the surface of the battery container. Is filled with the filler, and the filler is in a solid state, so that the natural frequency as a whole can be prevented from lowering, and the earthquake resistance can be improved. In particular, according to the filler, the gap between the pond container and the outer box having a narrow entrance and a large depth can be easily filled.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an example of an embodiment of a cathode absorption type sealed storage battery according to the present invention, in which an internal structure is omitted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery container 2 Outer box 3 Gap 4 Filler 5 Battery body

Claims (2)

[Claims] 1. A sealed cathode storage battery in which a battery case containing a power generating element is housed in a rigid outer case, wherein a surface of the battery case is provided in a gap between the battery case and the outer case. A filling material for filling the gap in a solid state in accordance with the concave shape of the negative electrode. 2. A method of manufacturing a sealed cathode storage battery in which a battery case containing a power generation element is housed in a rigid outer box, wherein the inside is negative due to a cathode absorption reaction after the battery case is sealed. After the deformation of the battery container due to the pressure becomes substantially saturated, the gap between the battery container and the outer box is filled with a filler filling the gap according to the concave shape of the surface of the battery container. A method for producing a cathode absorption type sealed storage battery, comprising: