JPH07142050A - Sealed lead-acid battery and its manufacture - Google Patents

Abstract

PURPOSE:To provide a sealed lead-acid battery which is excellent in volumetric efficiency and by which the danger of separation of a plate group by strap corrosion is hardly caused. CONSTITUTION:Since a strap 14 (14a, 14b and 14c) and an inter-cell connecting body 15 are embedded in filled resin 16 (16a, 16b and 16c) in the reverse cover of a storage battery, the strap is not corroded, so that the separation of a plate group by strap corrosion can be prevented. When the strap and the inter- cell connecting body are formed of a single plate-like body, differently from a case of an usual U-shaped cross section, a plate height can be heightened up to the vicinity of the cover reverse, so that a cover reverse space can be reduced. Thereby, a sealed lead-acid battery excellent in volumetric efficiency can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed lead acid battery and a method for manufacturing the same.

[0002]

2. Description of the Related Art Main parts of a conventional sealed lead-acid battery are shown in FIGS. In these figures, 3a is a plate group of end cells, 4a is a strap of the plate group 3a, 8 is a strap 3
It is a pole connected to a. The pole 8 passes through the pole through hole 10 formed in the lid 1 and projects to the outside of the battery. Reference numeral 7 is an external terminal connected to the tip of the pole 8 and 6a is a filling resin that covers the joint between the pole 8 and the external terminal 7. 9 is a pole 8
The rubber packing is attached to the battery pack to prevent the filling resin 6a from leaking into the storage battery through the gap between the pole 8 and the pole through hole 10.

Reference numerals 3b and 3c are electrode plates of the intermediate cell, and have straps 4b and 4c, respectively. Reference numeral 5 denotes an inter-cell connection body for connecting adjacent cells, which has a U-shaped cross section. The top 5a of the inter-cell connection body 5 is embedded in the filling resin 6b with which the dam 10 provided on the back of the lid is filled.

The inter-cell connecting body 5 having a U-shaped cross section is for connecting the adjacent cells across the battery case partition walls 2. Further, the electrode plate groups 3 all have the same height. Further, the battery case 11 and the lid 1 are integrally joined by the filling resins 6c and 6b.

[0005]

However, in the conventional sealed lead-acid battery as described above, the strap 4a of the end cell is used.
Since the pole columns 8 are formed on the bottom, there is a space corresponding to the pole column height between the upper surface of the strap 4 and the back of the lid, which causes a problem that volume efficiency is reduced.

Further, the strap 4a is located away from the back of the lid, and the lid 1 has a through hole 1 for the pole 8.
Since there is 0, it is not possible to bury the inside of the lid with a filling resin or the like. Further, since the straps 4b and 4c of the intermediate cell are also separated from the back of the lid, it is also impossible to bury them in the back of the lid. Therefore, the problem that the strap is corroded by the electrolytic solution and the electrode plate group is detached occurs.

The present invention has been made to solve the above problems, and an object thereof is to have excellent volumetric efficiency and to prevent the electrode plate group from being separated due to strap corrosion. An object is to provide a sealed lead acid battery.

[0008]

Therefore, the strap and the inter-cell connecting body are embedded in the filling resin in the battery back cover, and the external terminal is joined to the end cell strap and the external terminal is connected. The sealed lead-acid battery and the manufacturing method thereof are characterized in that the joint between the strap and the strap is embedded in the filling resin, and the strap and the inter-cell connection body are made of one plate-shaped body. It solves the problem.

[0009]

Since the strap and the inter-cell connection body are embedded in the filling resin in the back cover of the storage battery, the strap is not corroded and the electrode plate group can be prevented from being detached due to the strap corrosion. Further, by forming the strap and the inter-cell connection body by one plate-shaped body, the conventional cross section U
Unlike the letter-shaped case, the electrode plate height can be increased to the vicinity of the back of the lid, so the space behind the lid is reduced. Therefore, a sealed lead-acid battery with good volume efficiency can be obtained.

Further, according to the manufacturing method of the present invention, since it is not necessary to previously provide the lid with the hole for penetrating the pole, the strap of the end cell also serving as the pole can be satisfactorily filled in the filling resin. Can be buried.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments.

FIG. 1 is a sectional view of a main part of a sealed lead-acid battery according to an embodiment of the present invention. In this figure, 13
Reference symbol a is an electrode plate group of the end cells, 13b and 13c are electrode plate groups of the intermediate cells, and the heights of these electrode plate groups are configured to reach near the back of the lid. Reference numeral 101 is a lid, which does not have a pole post through hole. 14a is a strap of the end cell, which is embedded in the acid resistant thermosetting filling resin 16c. 14b, 1
4c is a strap of the electrode plate groups 13b and 13c, and 15 is a cell connection body for connecting them. In this example, these are constructed as an integrated plate-shaped body connection body. This plate-like body connecting body is also filled with the filling resin 16 filled in the dam 110b on the back of the lid.
It is buried in b. Reference numeral 12 is a battery case partition wall. In this example, the straps 14b, 14c of the electrode plate groups 13b, 13c
The cell connection body 15 and the cell connection body 15 are integrally formed into a plate-shaped body connection body. .

In this storage battery, after the electrode plate group 13 is inserted into the battery case 111 to form the strap 14 and the plate-shaped body connection body,
Put the battery case upside down, and dam 1 behind the lid
By fitting the lids 11a and 110b filled with the filling resins 16c and 16b with the lid 101, the strap 14, the plate-like body connecting body, and the upper part of the battery case partition wall 12 are embedded in the resin 6, and the resin is solidified. Obtainable.

FIG. 2 is a diagram showing a state in which an external terminal 17 is connected to the storage battery. This storage battery obtains a sealed lead storage battery in which the strap 14a of the end cell is embedded in the filling resin 16c by the above method, and then the lid 101 and a part of the filling resin 16c in the back of the lid are drilled or the like. After cutting and exposing a part of the strap 14a of the end cell, the external terminal 17 is joined to the exposed portion of the strap with solder or the like, and finally the joining portion between the external terminal 17 and the strap 14d is filled with the filling resin 16a. It can be manufactured by coating.

[0015]

As described above, according to the present invention, the strap and the inter-cell connection body are embedded in the filling resin in the back lid of the storage battery, and the external terminal is joined to the strap of the end cell. At the same time, the joint between the external terminal and the strap is embedded in the filling resin, and the strap and the inter-cell connection body are made of one plate-like body, and a method for manufacturing the same. It is about. According to this, it is possible to easily provide a sealed lead-acid battery that has excellent volume efficiency and that can prevent the electrode plate group from being separated due to strap corrosion.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part of a conventional sealed lead-acid battery.

FIG. 4 is a cross-sectional view of a main part of a conventional sealed lead-acid battery.

[Explanation of symbols]

 14 Strap 15 Inter-cell connection body 16 Filled resin 17 External terminal

Claims (4)

[Claims] 1. A strap (14) and an inter-cell connection body (1)
5) and 5) are embedded in a filling resin (16) in the back lid of the storage battery. 2. The external terminal is bonded to the strap of the end cell, and the bonding portion between the external terminal and the strap is embedded in the filling resin.
The sealed lead-acid battery described. 3. The sealed lead-acid battery according to claim 1, wherein the strap and the inter-cell connection body are made of one plate-shaped body. 4. A step of embedding a strap and an inter-cell connecting body in a filling resin in a storage battery back cover, a part of the filling resin in the storage battery cover and the cover back is removed, and a part of a strap of an end cell. And a step of joining the external terminal to the exposed portion of the end cell strap, and a step of coating the joint portion between the external terminal and the end cell strap with a filling resin. Item 2
Alternatively, the method for manufacturing the sealed lead-acid battery according to 3 above.