JP2982350B2 - Lead storage battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improving the performance of a lead storage battery.

[0002]

2. Description of the Related Art Conventionally, when assembling a lead-acid battery, a required battery has been constructed by stacking a plurality of anode plates and cathode plates on a separator. At that time, a glass mat was attached to the separator, and the assembly was generally performed using a flat separator. In addition, recently, a separator using a synthetic resin material such as polyethylene as a separator material has been adopted. Polyethylene separators can be made thinner than conventional separators, and thus have the advantage of low electrical resistance and good oxidation resistance.

[0003]

However, when the above-mentioned conventional polyethylene separator is used integrally with a glass mat, as shown in FIG.
Since the glass mat 2 is bonded in a lengthwise direction in a state where the glass mat 2 is bonded to form a bag shape, the bonded portion 3 is formed by welding or a mechanical seal. There was a problem that sealing was not possible. Therefore, the width of the glass mat is small considering the width
That is, the glass mat 2 in which both ends of the glass mat width do not reach the bonded portion 3 of the separator is placed on the separator 1
Was adopted as one. In FIG. 5, reference numeral 4 denotes a cathode plate accommodated in the bag-like separator 1, and 5 denotes an anode plate. However, when the width of the glass mat 2 is reduced as described above, the anode plate 5 is bent and comes into contact with the polyethylene separator 1 during use of the lead-acid battery under severe conditions as shown in FIG. In some cases, the active material dropped from the lattice may adhere to the portion 1S and cause a short circuit with the cathode plate 4.

The present invention has been made in view of the above points, and has as its object to improve the life performance of a lead storage battery using a separator used in the form of a bag such as polyethylene.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the lead-acid battery , and has a cathode plate and two side edges.
Bonded by welding or mechanical seal
A bag-shaped separator, a flat glass mat and an anode plate
A lead-acid battery comprising a group of electrodes having
Is wrapped in the bag-shaped separator.
Between the parator and the positive electrode plate, the bag-shaped separator
The flat glass mat separate from the
The flat glass mat is formed of the anode plate and the cathode plate.
At least over the entire surface, the flat plate
The width of the glass mat depends on the welding or mechanical
Bag-like separator with both sides glued together
And the above-mentioned welding or mechanical seal
It is characterized in that it is equal to or greater than the difference between the widths of the combined side end portions .

[0006]

According to the arrangement of the glass mat according to the present invention, the anode plate can be prevented from being in contact with the cathode plate through the polyethylene separator during use by the curvature of the anode plate during use, and the life of the anode plate can be improved. There is an effect.

[0007]

An embodiment of the present invention will be described. FIG. 1 shows a flat glass mat arrangement of a battery A1 of the present invention. A glass mat 6 having the same width as a bag-shaped polyethylene separator 1 is placed between an anode plate 5 and a separator. It is arranged separately from 1.

FIG. 2 shows the arrangement of a flat glass mat of the battery A2 of the present invention. The width of the glass mat 7 is the same as the width of the bag-shaped polyethylene separator 1 excluding the width of the bonded portion. This is arranged between the anode plate 5 and the separator 1 separately from the separator 1.

As shown in FIGS. 3 and 4, the batteries A1 and A2 of the present invention have a glass mat 6 which covers the entire area between the anode and anode plates 4 and 5 even if the anode plate 5 is curved during use under severe conditions. , 7 are interposed, thereby preventing a short circuit between the negative and anode plates 4, 5. Hereinafter, the battery life test according to the present invention will be described in comparison with a conventional battery. The conventional battery B (FIG. 5) and the batteries A1 and A2 according to the present invention using a glass mat integral with the separator, in which both ends of the glass mat width do not reach the bonded portion of the mechanical seal of the polyethylene separator, to form a bag. Compare. Battery is 12V, 5HR capacity 4
An 8 Ah battery was manufactured and a life test was performed. The test was performed at 75 ° C. Charging was performed at 14.8 V for 10 minutes, and discharging was performed at 25 A for 4 minutes. FIG. 7 shows the transition of the discharge voltage at the 30 seconds at that time.

[0010]

As described above, the batteries A1 and A2 of the present invention
According to the above, there is an effect that the battery life can be improved by about 50% as compared with the conventional battery B, which is effective for improving the life of the lead storage battery.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, wherein (a) is a top view and (b) is a front view.

FIG. 2 shows another embodiment of the present invention, wherein (a) is a top view and (b) is a front view.

FIG. 3 is a state diagram after use of FIG. 1;

FIG. 4 is a state diagram after use of FIG. 2;

5A and 5B show a conventional example, in which FIG. 5A is a top view and FIG.
Is a front view.

FIG. 6 is a state diagram after use of FIG. 5;

FIG. 7 is a comparative characteristic diagram showing a change in voltage at 30 seconds during a life test between the battery of the present invention and a conventional battery.

[Explanation of symbols]

1 is a polyethylene separator, 3 is a bonded portion, 4 is a cathode plate, 5 is an anode plate, 6 is a glass mat, 7 is a glass mat, A1 is a battery of the present invention, and A2 is a battery of the present invention.

Continuation of the front page (56) References JP-A-63-252354 (JP, A) JP-A-63-24547 (JP, A) JP-A-53-72133 (JP, U) JP-A-57-23868 (JP) , U) (58) Field surveyed (Int.Cl. ⁶ , DB name) H01M 2/16-2/18

Claims (2)

(57) [Claims] 1. The cathode plate and both ends are welded or mechanically bonded.
Bag-shaped separator and flat plate bonded by a seal
With an electrode group having a glass-like mat and an anode plate
A storage battery, wherein the cathode plate is the bag-shaped separator
Wrapped in the bag-shaped separator and the positive electrode plate
In between, the plate-shaped separator separate from the bag-shaped separator
A glass mat is provided, and the flat glass mat is provided.
Is spread over at least the entire surface of the anode plate and the cathode plate.
The width of the flat glass mat is
Both attached to each other by mechanical or mechanical seals
The width of the bag-shaped separator including the side end and the welding or mechanical
With the width of both end parts stuck by the nical seal
The lead-acid battery is not less than the difference between the two . 2. The glass mat according to claim 1 , wherein
A bag containing both ends glued together by a canal seal
2. The lead-acid battery according to claim 1, wherein the width of the lead- shaped separator is the same as the width of the separator .