JPH0729558A - Sealed storage battery - Google Patents

Abstract

PURPOSE:To provide a sealed storage battery in which the danger of explosion is hardly caused. CONSTITUTION:A sealed storage battery has a storage battery cover 1 where the first exhaust hole 6 and a recessed part 2 are formed on an upper surface, an exhaust valve part 5 formed on a bottom surface 4 of an early period recessed part, the first exhaust hole sealing member 9 and a recessed part cover 7 in which the second exhaust hole 10 is formed. Since a cover reverse space can be reduced easily, staying of inflammable gas can be eliminated, and a sealed storage battery by which the danger of explosion is hardly caused can be provided at low cost. Connection between cells or initial charging can be carried out without hindrance.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a sealed storage battery.

[0002]

2. Description of the Related Art The space between the upper part of the electrode plate of the storage battery and the back surface of the storage battery lid is called the back cover space. The space behind the lid exerts functions such as a liquid reservoir for allowing the electrolytic solution to permeate between the electrode plates, and a liquid overflow prevention due to gassing during initial charging.

In the sealed storage battery, the residual liquid in the space behind the lid is removed after the initial charge is completed. Therefore, the sealed storage battery after the initial charge must have the space behind the lid.
On the contrary, if there is a space behind the lid, flammable gas fills the space and the risk of explosion increases.

Therefore, in order to reduce such a risk, conventionally, the height of the inter-cell connecting portion is lowered to lower the position of the storage battery lid to make the back cover space as small as possible, or the back cover space. The amount of staying gas was reduced by filling the space with a filling material to reduce the space volume.

[0005]

However, the method of lowering the height of the cell-to-cell connecting portion has a problem that the workability of welding is deteriorated, and a method of filling a space behind the lid with a filling material such as resin particles. Has a problem that the manufacturing workability is significantly deteriorated.

The present invention has been made to solve the above-mentioned problems, and the purpose thereof is to reduce the space behind the storage battery lid without lowering workability and to reduce the risk of explosion. The object is to provide a small number of sealed storage batteries.

[0007]

Therefore, a storage battery lid having a first exhaust hole and a recess formed on the upper surface, an exhaust valve portion formed on the bottom surface of the first recess, and a first exhaust hole sealing member are provided. , Second
The above problem is solved by providing a sealed storage battery including a recess lid in which the exhaust hole is formed.

[0008]

In the present invention, the recess formed on the upper surface of the lid allows
It is characterized by reducing the space behind the lid. At the time of initial charging, the exhaust valve portion and the first exhaust hole on the bottom surface of the concave portion may be opened and the electrolytic solution may be sufficiently filled. Since the gas generated during charging is discharged from the first exhaust hole, the initial charging can be performed without causing trouble such as liquid overflow. After completion of the initial charge, excess electrolyte is removed, the first exhaust hole is sealed with a sealing member, a rubber valve is attached to the exhaust valve portion, and a recess lid is attached. As a result, the internal volume of the storage battery in which the flammable gas generated during charging can stay can be greatly reduced. If the recess is formed on the upper surface of the lid while leaving the portion necessary for the cell-to-cell connection, the cell-to-cell connection can be performed without any trouble.

[0009]

EXAMPLES The present invention will be described below with reference to specific examples.

FIG. 1 is a diagram showing an embodiment of the present invention.
In the figure, 1 is a storage battery lid, 2 is a recess formed in the storage battery lid, 5 is an exhaust valve portion formed on the bottom surface 4 of the recess, 6 is a first exhaust hole formed in the storage battery lid 1, and 11 is A rubber valve mounted on the exhaust valve unit 5, a recess cover for covering the recess,
Reference numeral 10 is a second exhaust hole formed in the recess lid 7. Reference numeral 9 denotes a protrusion formed on the recess lid 7, and the first exhaust hole 6 is closed by fitting the first exhaust hole 6 and the protrusion 7. 1
Reference numeral 2 is a battery case, and 13 is an electrode plate. It is essential that the recess 2 be formed so that the space between the lids (not shown) is left and the space behind the lid is reduced as much as possible.

In such a storage battery, the recess lid 7 is not attached and the first exhaust hole 6 and the exhaust valve portion 5 are opened at the time of initial charging. As shown in FIG. 14, the electrolytic solution is filled up to above the bottom surface of the recess so as to sufficiently penetrate between the electrode plates. When charging is started in this state, a small amount of gas is discharged from the second exhaust hole located below the electrolytic solution surface level, and most of the charging gas is discharged from the first exhaust hole formed on the battery cover surface. To be done.

When the initial charging is completed, the excess electrolytic solution is completely removed, and after the rubber valve 11 is attached to the exhaust valve section 5,
The recess lid 7 is attached. In this example, the first exhaust hole is sealed by the projection 9 provided on the recess lid 7, but a separately provided sealing plug may be used.

At the stage where the initial charging is completed, the electrolytic solution is removed and is retained only between the electrode plates. Therefore, when gas is generated in the storage battery and the internal pressure rises, the gas passes through the exhaust valve section 5, The gas is exhausted to the outside through the exhaust hole 10. Rubber valve 1
1 also has a function of blocking outside air from entering the storage battery.

[0014]

As described above, in the sealed storage battery according to the present invention, the storage battery lid having the first exhaust hole and the recess formed on the upper surface, the exhaust valve portion formed on the bottom surface of the recess, First
The exhaust hole sealing member and the recess lid in which the second exhaust hole is formed are provided. Thereby, the space behind the lid can be reduced, so that the accumulation of flammable gas can be reduced, and the sealed storage battery with less risk of explosion can be provided at low cost. Moreover, cell-to-cell connection and initial charging can be performed without any trouble.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Battery Cover 2 Recess 5 Exhaust Valve 6 First Exhaust Hole 7 Recess Lid 9 Hole Sealing Member 10 Second Exhaust Hole

Claims (1)

[Claims] 1. A storage battery lid (1) having a first exhaust hole (6) and a recess (2) formed on an upper surface thereof, and an exhaust valve portion (5) formed on a bottom surface of the recess (2) at a first stage. A sealed storage battery comprising a first exhaust hole sealing member (9) and a recess lid (7) having a second exhaust hole (10) formed therein.