JPS6391952A - Electrolyte injecting method for lead storage battery - Google Patents

Abstract

PURPOSE:To shorten the injection time and save the labor without damaging an isolator by boring a hole on the side of a vacuum injecting jig provided with a liquid level sensor. CONSTITUTION:A liquid injecting jig 5 provided with a liquid level sensor 17 is fitted to the liquid injecting port 7 of a battery 1, a liquid injecting solenoid valve 10 is closed and a vacuum switching solenoid valve 14 is opened, then the battery 1 and the jig 5 are maintained vacuum. Next, when the solenoid valve 10 is opened, an electrolyte in a container 9 passes a cylinder 15 penetrating the jig 5 and is poured on the upper whole body of the battery 1 through a hole 16 bored on the side of the cylinder 15, thus the electrolyte is injected into the battery in a short time without damaging isolating plates such as electrode plates. Accordingly, the injection time is shortened and the labor is saved without damaging isolators.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an improvement in the electrolyte injection method for lead-acid batteries.

Conventional technology and its problems Lead-acid batteries have become increasingly smaller and larger in size (increased volumetric efficiency) in recent years, and the electrode plates inside the battery case have become smaller and larger in size (increased volumetric efficiency).

As the active material occupies a larger proportion, there is almost no space left 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 is aligned with 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. . Further, from the time VAPa is injected, a chemical reaction begins between the electrode plate and the electrolyte and carbon dioxide gas is generated. As a result, the internal pressure dropped and the liquid could not be filled completely, so it was necessary to perform vacuum injection again. In addition, it was necessary to check whether all the electrolyte had entered the battery, which required a lot of manpower.

The present invention solves the above-mentioned problems and injects electrolyte into a lead-acid battery. Moreover, the purpose is to save labor.

Means for Solving the Problems The electrolyte injection method for lead-acid batteries of the present invention uses an electrolyte injection jig that has a connection part that closely fits into the injection port of a lead-acid battery and a liquid level sensor. Fix the electrolyte supply section on the right side of the valve and the vacuum switching section having a vacuum switching solenoid valve, and insert a cylinder connected to the electrolyte supply section with a hole in the side into the battery from the liquid injection port of the lead-acid battery. , place the connection part of the injection jig tightly against the injection port,
The electrolyte is injected by operating the liquid injection solenoid valve and the vacuum switching solenoid valve.

By inserting the tube one width into the battery and making a hole on the side, the isolator will not be damaged when vacuum injecting the electrolyte into the lead-acid battery, and the injection time can be significantly reduced by directly injecting the electrolyte into the battery. By shortening it and adding a liquid level sensor, you can make it look ancient.

Example Hereinafter, an example of the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic diagram for explaining the liquid injection method of the present invention. In the figure, 1 is a 10 storage battery, 2 is a group of electrode plates, S is a battery case, and 4 is a liquid injection port. Reference numeral 5 denotes a liquid injection jig 11 that connects a connection part 6 that tightly fits into the liquid injection port 4, and injects the battery 1 through a sealing pad 7 made of acid-resistant neoprene rubber fixed to the base of the connection part 6. It is in close contact with the liquid port. 8 is an electrolyte supply unit that holds the electrolyte container 9 and the liquid injection solenoid valve 10 to the right; 11
is a vacuum switching section consisting of a vacuum pump 12 and a vacuum switching solenoid valve 14 having an air intake port 13;
The vacuum switching unit 11 is fixed to the upper part of the liquid injection jig 5. Reference numeral 15 denotes a cylinder connected to an electrolyte supply section, the tip of the cylinder is inserted into the battery through the liquid injection port 4, and a hole 16 for liquid injection is bored in its side. 17 is a liquid level sensor.

Next, a method of injecting the electrolyte will be explained. First, when the liquid injection solenoid valve 10 is closed and the vacuum switching solenoid valve 14 is opened, the inside of the battery and the jig is maintained at a vacuum of 730 mm 1-10. Next, when the liquid injection solenoid valve 10 is opened, the electrolyte in the container 9 passes through the cylinder 15 and is injected into the battery through the hole 16. Since there is a hole in the side of the tube, the electrolyte can be poured over the entire top and the electrode plate (
The injection is completed without being visible. In the present invention, 200
It takes about 30 seconds to inject cc liquid, which can be significantly shortened.

FIG. 2 is a diagram showing the gas light effect when a left electrode plate is immersed in sulfuric acid, using the number of left electrode plates as a parameter. The number of days 180 days, 90 days, and 0 days for the positive plate are shown as Δ, B, and C, respectively, and those for the negative plate are shown as A', B', and C.
' Indicated by '. If the electrode plate has been stored for three months, debris will blow out from the electrode plate. Conventionally, this gas pushed the liquid back and the liquid could not enter. However, 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. Since the gas generated escapes into the space inside the jig without pushing the liquid back, the liquid can be poured smoothly even on the electrode plate in this way, and there is no need to evacuate it again.

In addition, even more intense gas generation can be seen in electrode plates that have been left unused for more than six months. In this case, a portion of the liquid may remain in the cylinder 1G, and the liquid may be pushed up and remain at the inner bottom of the injection jig 5. In such a case, when the liquid level sensor 17 detects that the electrolyte has exceeded -F, the solenoid valve is activated as follows. Injection? u Solenoid valve 0 (1) Use the vacuum pump 12 to remove the air in the liquid injection jig space, open the liquid injection solenoid valve for a few seconds and let out all the liquid in this part.Next, close it and close the vacuum switching solenoid. The valve 14 is opened and atmospheric pressure is introduced through the air intake port 13. As a result, the electrolyte remaining in the injection jig is pushed from above by the atmospheric pressure that has entered the space inside the jig and is pushed into the lead-acid battery 1. Injection is complete.

Effects of the Invention According to the present invention, it is possible to significantly shorten the injection time and save labor by not using a separator during vacuum injection of electrolyte into a lead acid pond.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram for explaining the liquid injection method 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 idle accounts as a parameter. 1... Lead-acid battery, 2... Plate group, 3... Battery case, 4
...Liquid injection port, 5...Liquid injection jig, 6...Connection part, 7
... Seal backing, 8... Electrolyte supply section, 9.
...liquid receptacle, 10...liquid injection solenoid valve, 11...vacuum switching unit, 12...vacuum pump, 13...air suction port, 14...vacuum switching solenoid valve, 15 ...tube, 16.
...hole, 17...liquid level sensor 1 cause

Claims (1)

[Claims] 1. Fix an electrolyte supply section with a solenoid injection valve and a vacuum switching section with a vacuum switching solenoid valve to an injection jig that has a connection part that tightly fits into the injection port of a lead-acid battery and a liquid level sensor. death,
Insert the tube connected to the electrolyte supply section and with a hole on the side into the battery from the liquid injection port of the lead-acid battery, fit the connection part of the liquid injection jig to the liquid injection port, and connect the above liquid injection solenoid valve and the above. An electrolyte injection method for lead-acid batteries characterized by injecting electrolyte by operating a vacuum switching solenoid valve.