JPS63152856A - Electrolyte pouring equipment for storage battery - Google Patents

Abstract

PURPOSE:To make it possible to remarkably shorten electrolyte poring time by fitting the connecting part of an electrolyte pouring unit to the electrolyte pouring hole of a storage battery, and inserting a hose connected to an electrolyte supply part into the battery from the electrolyte pouring hole. CONSTITUTION:A hollow part 5' serving as gas reservoir or electrolyte reservoir is formed inside an electrolyte pouring unit 5 having a connecting part 6 which is fitted to an electrolyte pouring hole 4. The electrolyte pouring unit 5 is connected to the electrolyte pouring hole of a battery 1 via a sealing gasket 7 made of acid resistant neoprene rubber fixed on the bottom of the connecting part 6. An electrolyte pouring valve 10 is closed and a vacuum switching valve 14 is opened to make the inside of the battery and the unit 5 vacuum. When the valve 10 is opened, the electrolyte in a container 9 is poured into the battery through a hose 15 from a hole 16. If gas evolution is violent, the electrolyte remains in the bottom of the electrolyte pouring unit 5. The valve 10 is closed and the air in the space of the unit 5 is removed with a vacuum pump 12, then the valve 10 is opened for several seconds to completely remove the remained electrolyte. Thereby, the electrolyte pouring time is remarkably shortened without damage of separators.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in an electrolyte injection device for a storage battery.

Conventional technology and its problems Storage batteries, especially lead-acid batteries, have become increasingly smaller in recent years.

As capacity increases (volume efficiency increases), the proportion of electrode plates and active materials in the battery case increases, leaving almost no space for the electrolyte.

Since the electrolytic solution is structured to soak into the separators and electrode plates, it takes more than 5 minutes to inject, for example, 200 cc of electrolyte. Furthermore, when injecting liquid under vacuum using a liquid injection jig that fits into the liquid injection port of a lead-acid battery, the liquid blows out from the injection port in one place, which tends to damage the isolator, which is made of soft and thin glass fiber. . Also, from the time sulfuric acid is injected, a chemical reaction begins between the electrode plate and the electrolyte, generating carbon dioxide gas. As a result, the internal pressure rose and the liquid could not be filled completely, making it necessary to perform vacuum injection again.

The present invention solves the above-mentioned problems and injects electrolyte into a storage battery, and aims to significantly shorten the injection time without damaging the separator during vacuum injection of electrolyte into a storage battery. be.

Means for Solving the Problems 'Ml!' of the present invention. The electrolyte injection device for the pond has an injection jig that has a connection part that fits tightly into the injection port of the storage battery, and a hollow part.
It is equipped with an electrolyte supply part and a vacuum switching part, and when the connection part of the liquid injection jig is tightly fitted into the liquid injection port of the storage battery, the cylinder connected to the electrolyte supply part is connected to the inside of the battery from the liquid injection port of the storage battery. It is characterized by being configured so that it can be inserted into.

By inserting the tube into the battery and directly filling the battery with electrolyte, injection time can be significantly shortened.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the liquid injection device of the present invention. In the figure, 1 is a lead-acid battery, 2 is a group of electrode plates, 3 is a battery case, and 4 is a liquid injection port. Reference numeral 5 designates a liquid injection jig having a connection part 6 that fits tightly into the liquid injection port 4, and a hollow part 5' separate from the battery case for storing gas and liquid is formed inside the jig for connection. It is in close contact with the liquid injection port of the battery 1 via a sealing packing 7 made of acid-resistant neoprene rubber fixed to the base of the part 6. Reference numeral 8 denotes an electrolytic solution supply section having an electrolyte solution container 9 and a liquid injection valve 10; 11 a vacuum switching section consisting of a vacuum pump 12 and a vacuum switching valve 14 having an air suction port 13; The portion 11 is fixed to the upper part of the liquid injection jig 5. 15 is a cylinder connected to the electrolyte supply part, the tip of the cylinder is inserted into the battery from the liquid injection port °4,
A hole 16 for pouring liquid is formed on its side.

Next, a method of injecting an electrolyte using the device of the present invention will be explained. First, when the liquid injection valve 10 is closed and the vacuum switching valve 14 is closed, the inside of the battery and the jig are maintained at a vacuum of 730 si Hg.

Next, when the liquid injection valve 10 is opened, the electrolytic solution in the container 9 passes through the tube 15 and is injected into the battery through the hole 16.

The electrolyte is poured over the entire top without damaging the electrode plate, and the injection is completed.

FIG. 2 is a diagram showing the amount of gas generated when a left-standing electrode plate is immersed in sulfuric acid, using the number of days left as a parameter. The cases where the positive electrode plate was left for 180 days, 90 days, and 0 days are indicated by A, B, and C, respectively, and those of the negative electrode plate are indicated by A', B', and C.
Indicated by '.

When a conventional vacuum injection device is used, it takes about 40 seconds to inject liquid into an electrode plate that has been left for 0.5 months. In the case of the present invention, the liquid injection time is about 20 seconds, which is about half of the conventional method.

Additionally, if the electrode plate has been left alone for a month, the electrolyte may not be able to be injected using conventional equipment due to the generation of gas, which causes the solution to heat up, or the internal pressure will rise so much that the electrolyte cannot be filled. For this reason, it is necessary to perform evacuation again and inject liquid. In the case of the present invention, the pressure increase inside the battery is small and the injection is completed in one go.

Gas will blow out from the electrode plate if it has been stored for three months. Conventionally, this gas pushed the liquid back and the liquid could not enter.

However, in the case of the present invention, liquid injection is performed smoothly even with such an electrode plate, and there is no need to evacuate it again. This is because in the case of the present invention, the cylinder is inserted into the battery, and the path for the electrolyte to enter the battery and the path for gas to exit from the battery are separated into the inside and outside of the cylinder, and are different. This is because the generated gas escapes into the hollow part of the jig without pushing the liquid back. In addition, even more intense gas generation can be seen in electrode plates that have been left unused for more than six months.

In such a case, in the conventional device, it is necessary to perform evacuation three times, but in the present invention, the liquid injection is completed in two times.

The liquid injection method in this case will be described below.

When gas generation is intense, liquid remains at the inner bottom of the liquid injection jig 5.

At this time, the liquid injection valve 10 is closed and the vacuum pump 12 is used to remove the air in the liquid injection jig space, and the liquid injection valve is opened for a few seconds to drain out all the liquid in this area. Next, after closing this, the vacuum switching valve 14
is opened and atmospheric pressure is introduced from the air intake port 13. As a result, the electrolytic solution remaining in the injection jig is pushed from above by the atmospheric pressure that has entered the space inside the jig and pushed into the lead-acid battery 1, completing the injection.

Effects of the Invention According to the present invention, the separator is not damaged during vacuum injection of electrolyte into a storage battery, and the injection time can be significantly shortened.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the liquid injection device of the present invention, and Fig. 2 shows the amount of gas generated when the left electrode plate is immersed in sulfuric acid.
It is a figure showing the number of days of neglect as a parameter. 1... Lead-acid battery, 2... Plate group, 3... Battery case, 4
...Liquid injection port, 5...Liquid injection jig, 5'...Hollow part,
6... Connection part, 7... Backing, 8... Electrolyte supply part, 9... Electrolyte container, 10... Liquid injection valve, 11
...Vacuum switching unit, 12...Vacuum pump, 13...
Air intake port, 14...Vacuum switching valve, 15...Cylinder, 1
6...Hole λ 1N! lI

Claims (1)

[Claims] 1. A liquid injection jig having a connecting part and a hollow part that tightly fits into a liquid injection port of a storage battery, comprising an electrolyte supply part and a vacuum switching part,
When the connection part of the liquid injection jig is tightly fitted into the liquid injection port of the storage battery, the cylinder connected to the electrolyte supply part is inserted into the battery from the liquid injection port of the storage battery. Electrolyte injection device. 2. The electrolyte injection device for a storage battery according to claim 1, wherein the cylinder connected to the electrolyte supply section is a cylinder with a hole provided on the side of a portion located inside the battery.