JPH06223817A - Sealed type lead-acid battery and its manufacture - Google Patents

Abstract

PURPOSE:To prevent electrolyte from attaching to a nozzle hole or overflowing during pouring or charging by furnishing an overflow preventing plate having a hole or notch situated below the nozzle hole. CONSTITUTION:An electrolyte pouring nozzle 1 is approached to an overflow preventing plate 7 provided with a hole 8, wherein the setting is such that the min. clearance A between the nozzle 1 and plate 7 is zero while the maximum is several times as large as the diameter of the nozzle hole. If in this condition the electrolyte is poured, the electrolyte discharged from the nozzle 1 is put in the battery in the lower part of the plate 7 upon passing through the hole 8. The electrolyte runs against the plate group 11 and sputters, and its portion sputtering upward runs against the overflow preventing plate, and does not attach to the nozzle hole 2. The gas generated due to charging is turned into bubbles in the electrolyte, and they are destroyed at the surface of electrolyte, when the electrolyte will sputter. The electrolyte sputtered upward runs against the plate 7 having hole 8, and does not attach to the nozzle hole 2.

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 having a structure in which an electrolyte does not overflow from a liquid injection port during liquid injection and battery case formation, and a method for manufacturing the same.

[0002]

2. Description of the Related Art A conventional sealed lead-acid battery will be described with reference to the drawings.

FIG. 1 shows a state in which a conventional sealed lead-acid battery is charged and an electrolyte is injected. In FIG. 1, 1 is an injection nozzle, 2 is an injection port, 3 is an overflow prevention plate,
Reference numeral 4 is an electrolyte solution that has been injected, 5 is an electrolyte solution that scatters when the solution is injected, 6 is an electrolyte solution that adheres to the injection port, 11 is an electrode plate group, 1
Reference numeral 2 denotes a gas generated during charging in the form of bubbles in the electrolytic solution, and 13 denotes an electrolytic solution scattered when the bubbles 12 are broken on the surface of the electrolytic solution.

In FIG. 1 (a), the gas generated by charging becomes bubbles 12 in the electrolytic solution, and the bubbles 12 are broken on the surface of the electrolytic solution, at which time the electrolytic solution 13 is scattered. The electrolytic solution 13 scattered in the upward direction hits the overflow prevention plate 3 and is blocked, so that it does not adhere to the injection port 2. That is,
When the internal pressure of the battery rises due to the gas generated during charging, the electrolytic solution 6 attached to the liquid injection port 2 spouts out of the battery together with the gas from the liquid injection port 2 and overflows. 3 serves to prevent this.

[0005]

However, in the above-mentioned conventional configuration, as shown in FIG. 1B, when the electrolytic solution is injected, the electrolytic solution 5 discharged from the injection nozzle 1 is injected into the injection port 2
Will adhere to the lower part of the nozzle and the liquid injection nozzle 1. The electrolytic solution 6 that has adhered has the drawback that it is lifted up together with the liquid injection nozzle 1 when the liquid injection nozzle 1 is removed and overflows, or it is ejected together with the gas and overflows as described above. For this reason, a technology has been developed in which the liquid injection nozzle is inserted into the liquid injection port, and the liquid is injected using a nozzle with the discharge port opened in the lateral direction, but this method also causes scattered electrolyte to adhere to the liquid injection port. It was not possible to completely prevent it.

The present invention solves the above-mentioned problems of the prior art, the electrolytic solution does not adhere to the injection port and does not overflow when the electrolytic solution is injected, and the electrolytic solution does not adhere to the injection port during charging. An object of the present invention is to provide a sealed lead acid battery having a structure that does not overflow and a method for manufacturing the same.

[0007]

In order to achieve this object, the sealed lead-acid battery of the present invention is provided with an overflow prevention plate having a hole or a notch located below the electrolyte solution inlet. .

Further, according to the method of manufacturing a sealed lead-acid battery provided with the overflow prevention plate having the hole located below the electrolyte injection port of the present invention, the overflow does not have the hole before the injection of the electrolyte. A sealed lead-acid battery provided with a liquid prevention plate was assembled, and then a hole was formed in the overflow prevention plate, and an electrolytic solution was injected through the hole.

Further, according to the present invention, there is provided a method for manufacturing a sealed lead-acid battery provided with an overflow prevention plate having a notch located below the electrolytic solution injection port, the electrolytic solution injection port being provided before the electrolytic solution is injected. Assemble a sealed lead-acid battery with an overflow prevention plate having a notch located below, and inject the liquid while contacting the injecting nozzle with the notch, or by inserting the injecting nozzle, The hole was enlarged, and the electrolyte was injected in that state, and the injection nozzle was removed after the injection.

[0010]

With this overflow prevention plate having holes or notches, the electrolytic solution prevents the electrolytic solution from adhering to the injection port at the time of injecting the electrolytic solution, and the electrolytic solution scatters due to the destruction of bubbles due to the generated gas during charging. Can be prevented from adhering to the injection port.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows the state of the electrolyte solution injection port of the sealed lead acid battery provided with the overflow prevention plate having the hole of the present invention. In the figure, 7 is an overflow prevention plate having holes 8 and A is an overflow prevention plate 7
And B is the clearance of the liquid injection nozzle 1, B is the diameter of the liquid injection port of the liquid injection nozzle 1, and the other components denoted by the same reference numerals as in FIG. 1 are the same as those of FIG.

The operation of the sealed lead-acid battery constructed as above will be described. First, regarding the operation of injecting the electrolytic solution, the injecting nozzle 1 is brought close to the overflow prevention plate 7 having the hole 8. Nozzle 1 and overflow prevention plate 7 at this time
The clearance A is set to a minimum of 0 and a maximum of 10 times the diameter B of the nozzle injection port. When the electrolytic solution is injected in this state, the electrolytic solution discharged from the nozzle 1 is injected into the battery below the overflow prevention plate 7 through the hole 8 of the overflow prevention plate 7. At this time, the electrolytic solution hits the electrode plate group 11 and scatters, but the electrolytic solution scattered upward hits the overflow prevention plate 7,
Does not adhere to the injection port 2.

FIG. 3 shows the positional relationship between the liquid injection nozzle 1 and the overflow prevention plate 7 having the hole 8. As shown in FIG. 3A, the liquid injection nozzle 1 and the overflow prevention plate 7 are completely in contact with each other. It goes without saying that the liquid may be injected in this state, or as shown in FIG. 3B, the liquid may be injected with the liquid injection nozzle 1 penetrating the hole 8 of the overflow prevention plate 7.

FIG. 4 shows a charged state of the sealed lead-acid battery of the present invention. In the figure, 12 is gas generated during charging in the form of bubbles in the electrolyte, 13 is the electrolyte scattered when the bubbles are destroyed on the surface of the electrolyte, and the following is the same as the configuration of FIG. is there.

The gas generated by charging becomes bubbles 12 in the electrolytic solution, and the bubbles 12 are broken on the surface of the electrolytic solution, at which time the electrolytic solution is scattered. The electrolytic solution 13 scattered upward hits the overflow prevention plate 7 having the holes 8 and does not adhere to the liquid injection port 2. Since the amount of the electrolytic solution passing through the hole 8 of the overflow prevention plate 7 having the hole 8 and adhering to the lower part of the liquid injection port 2 is extremely small, it is necessary to form a film of the electrolytic solution at the lower part of the liquid injection port 2. It does not reach, and overflow does not occur.

FIG. 5 shows a typical example of another shape of the overflow prevention plate having holes. In the figure, 14 is an electrode plate joint, and 15 is a case on the battery case.

In FIG. 5 (a), an overflow prevention plate 7a having a U-shaped bent hole is inserted between the electrode plate joints 14 so that the flat surface of the overflow prevention plate faces upward. Things, Figure 5 (b)
5C, the overflow prevention plate 7b having a U-shaped bent hole was inserted into the upper case 15 of the battery case so that the flat portion of the overflow prevention plate faced downward. An upper case 15 with an overflow prevention plate function 7c is integrally formed.
It goes without saying that any shape may be used.

FIG. 6 shows a typical example of the method for processing the holes in the overflow prevention plate. In the figure, 16 is a punch, 17 is a die, and 1
8 is a punching waste, 19 is a punching needle, 20 is a hot iron,
FIG. 6 (a) shows a method for processing a hole by punching, FIG. 6 (b) shows a method for processing with a needle, and FIG. 6 (c) shows a method for processing with a hot iron. It goes without saying that a processing method may be used. In addition, FIG.
It goes without saying that the processing methods of (b) and (c) may be a method of processing after assembling the battery and before injecting the liquid.

FIG. 7 shows a typical example of the shape of the holes of the overflow prevention plate having holes. As shown in FIG. 7A, the hole shape is
In addition to round holes, polygonal shapes such as triangular holes and square holes may be used. As shown in FIG. 3, when the liquid injection nozzle 1 and the overflow prevention plate 7 are completely in contact with each other or when the liquid injection nozzle 1 penetrates the hole 8 of the overflow prevention plate 7 having holes, Like 7 (b),
Instead of forming a complete hole, the overflow prevention plate 7 may have a notch. As shown in FIG. 3A, when the liquid injection nozzle 1 and the overflow prevention plate 7 having a hole are completely in contact with each other, the overflow pressure prevention plate is generated by the discharge pressure of the electrolytic solution discharged from the liquid injection nozzle 1. The notch 7 is bent to form a hole. In the case of FIG. 3B, a hole is formed by inserting the nozzle 1 into the cutout portion of the overflow prevention plate 7. When the overflow prevention plate 7 is formed with a notch, the hole formed in the overflow prevention 7 is closed by the restoring force during charging, so that the scattered electrolyte is injected into the injection port 2 during charging. It has a better structure because it can be completely prevented from adhering to.

[0021]

As described above, the present invention can realize an excellent sealed lead-acid battery that does not overflow by providing the overflow prevention plate having a hole or a notch located below the liquid injection port.

[Brief description of drawings]

FIG. 1A is a cross-sectional view of a sealed lead-acid battery with a conventional overflow prevention plate in a charged state. FIG. 1B is a cross-section of a sealed lead-acid battery with a conventional overflow prevention plate in an electrolyte-filled state. Figure

FIG. 2 is a sectional view of an embodiment of the sealed lead-acid battery of the present invention in a state of electrolyte injection.

FIG. 3 is a sectional view showing a positional relationship between a liquid injection nozzle and an overflow prevention plate of an embodiment of the sealed lead-acid battery of the present invention.

FIG. 4 is a sectional view of an embodiment of the sealed lead acid battery of the present invention in a charged state.

FIG. 5 is a cross-sectional view of another embodiment of the overflow prevention plate used in the sealed lead-acid battery of the present invention.

FIG. 6 is an explanatory view of drilling holes in the overflow prevention plate used in the sealed lead-acid battery of the present invention.

FIG. 7 is a perspective view of another embodiment of the overflow prevention plate used in the sealed lead-acid battery of the present invention.

[Explanation of symbols]

 1 Injection nozzle 2 Injection port 3 Overflow prevention plate 4 Electrolyte that has been injected 5 Electrolyte that scatters when injecting 6 Electrolyte that adheres to the injection port 7 Overflow prevention plate with holes 7a hole Overflow prevention plate having 7b Overflow prevention plate with hole 7c Overflow prevention plate with hole 8 Holes for overflow prevention plate 11 Electrode plate group 12 Bubbles 13 Scattered electrolyte solution 14 Electrode plate joint part 15 Battery case upper case 16 Punch 17 Die 18 Punching scrap 19 Drilling needle 20 Thermal iron A Clearance between overflow prevention plate and injection nozzle B Diameter of injection port of injection nozzle

Claims (3)

[Claims] 1. A sealed lead acid battery provided with an overflow prevention plate having a hole or a notch located below an electrolyte solution injection port. 2. A method for manufacturing a sealed lead-acid battery having an overflow prevention plate having a hole located below an electrolyte injection port, the overflow having no hole before injecting the electrolyte. A method for manufacturing a sealed lead acid battery, comprising assembling a sealed lead acid battery provided with a prevention plate, then forming a hole in the overflow prevention plate, and injecting an electrolytic solution through the hole. 3. A method for manufacturing a sealed lead-acid battery having an overflow prevention plate having a notch located below the electrolyte injection port, wherein the electrolyte injection port is provided before the electrolyte injection. Assemble a sealed lead-acid battery with an overflow prevention plate having a notch located below, and inject the liquid by contacting the injecting nozzle with the injecting nozzle, or by inserting the injecting nozzle, the hole is formed in the incising hole. The method for manufacturing a sealed lead-acid battery is characterized in that the electrolyte solution is injected in that state, and the injection nozzle is removed after the injection.