JPH02284352A - Electrolyte filling device for battery - Google Patents

Abstract

PURPOSE:To allow a certain quantity of electrolyte to be filled by closing a filling electromagnetic valve and opening a discharging electromagnetic valve when a short electrode detects an electrolyte level and closing the discharging electromagnetic valve when a long electrode deviates from the electrolyte level. CONSTITUTION:A filling port 5 is connected to an electrolyte servicing tank 1 via a filling electromagnetic valve 3 and a discharging port 6 is connected to a filling nozzle 11 for a battery 12 via a discharging electromagnetic valve 4. When a short electrode 7 detects an electrolyte level, the filling electromagnetic valve 3 is closed and the discharging electromagnetic valve 4 is opened, and hen a long electrode deviates from the electrolyte level, the discharging electromagnetic valve 4 is closed. It is thus possible to fill electrolyte the quantity of which is equivalent to a difference between the heights of the short electrode 7 and the long electrode 8 in a measuring tube 2. A certain quantity of electrolyte is filled in each battery cell, accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for injecting electrolyte into a storage battery.

BACKGROUND ART FIGS. 2 and 3 both show a conventional electrolyte injection device using a double pipe.

The device shown in FIG. 2 injects electrolyte into the storage battery 12 through an inner tube 20, and sucks and discharges the excessively injected electrolyte through a drain path 23 formed by the inner tube 20 and the outer tube 21. It has a structure. Further, in FIG. 3, electrolytic solution is injected into the storage battery 22 through the injecting path 22 formed by the inner tube 20 and the outer tube 21, and the excessively injected electrolyte is sucked and discharged from the inner tube 20. It has a structure.

Problems to be Solved by the Invention In the above-mentioned electrolyte injection device that uses double pipes to inject and drain liquid, when draining excessively injected electrolyte, the drain path is connected to the inside of the cell. There is a tendency for the drain passage to become clogged with constituent materials (such as active material that has fallen off from the electrode plates) and foreign matter from the outside, and the drain passage must be cleaned from time to time.

In order to solve this problem, it is possible to increase the diameter of the double tube, but since this double tube is used by inserting it into the storage battery's injection port, it is difficult to obtain sufficient dimensional margin. It is.

In addition, in order to inject a predetermined amount of electrolyte into the storage battery, it is necessary to accurately align the lower end of the drainage passage with the specified liquid level position in the storage battery, and since the amount of electrolyte in the storage battery varies depending on the model, The above operations will need to be performed frequently.

Furthermore, the injection using the double pipe described above is in principle a constant liquid level injection method, and the electrolyte is injected to a constant liquid level position regardless of the volume of the components in each cell of the storage battery. If there is variation in the volume of the parts, there will be a difference in the amount of electrolyte in each cell. For this reason, when forming the electrode plates using the in-container forming method, a difference occurs in the electrolyte specific gravity of each unit cell after the process is completed. In order to reduce this difference, it is desirable to inject a fixed amount of electrolyte into each unit cell.

Means for Solving the Problems The present invention eliminates the above-mentioned problems by arranging two long and short electrodes in the metering tube, and an electrolyte inlet and drain at the bottom of the tube. An outlet is provided, the tip of the short electrode is located at the upper part of the metering tube, the tip of the long electrode is located below the tip of the short 4 poles, and the inlet is injected with electrolyte via an injection solenoid valve. connected to the service tank,
The discharge port is connected to the injection nozzle to the storage battery via a discharge solenoid valve, and when the short electrode detects the electrolyte level, it closes the Tth magnetic valve for injection and closes the 'th magnetic valve for discharge. The discharge solenoid valve is configured to close when the long electrode is opened and the long electrode separates from the electrolyte surface, thereby discharging an amount of electrolyte corresponding to the difference in height between the short electrode and the long electrode in the metering tube. There are products that are characterized by being injected into storage batteries, and there are also products that accommodate different injection amounts depending on the type of storage battery.
By making the long electrode within the metering tube vertically movable, the amount of electrolyte injected into the storage battery from the metering tube can be adjusted.

Example The present invention will be described in detail below with reference to FIG.

This device is a so-called 1 unit made up of 6 single cells.
This is for injecting electrolyte into each cell of a 2V monoblock storage battery, and includes a service tank 1, six sets of metering tubes 2, corresponding to each cell. Solenoid valve for injection 3. Discharge solenoid valve 4. Short electrode7. It consists of a measuring section consisting of a long electrode 8 and six liquid injection nozzles 11.

In the measuring section, each measuring tube 2 has a long electrode 8. The short electrode 7 is suspended, and the short electrode 7 is fixed. The long electrodes 8 are attached to an electrode holding plate 10 that is movable in the vertical direction with respect to the measuring tube 2. By moving the electrode holding plate 10 in the vertical direction, the six long electrodes can be moved to any position within the measuring tube at the same time. It is configured so that it can be set to

The electrolyte in the service tank 1 is sent through the vinyl hose 13 to the inlet side of the injection solenoid valve 3, and when the injection solenoid valve is opened, it is supplied into the metering tube from the injection port 5 provided on the bottom of the metering tube. Ru. The electrolyte level in the measuring tube is 4F! When the lower end of 7 is reached, the short electrode becomes conductive, thereby closing the injection solenoid valve 3 and completing metering. At the same time, that is, when the short electrode 7 becomes conductive, the discharge solenoid valve 4 opens, and the electrolyte is injected into the storage battery 12 from the injection nozzle 11 through the vinyl hose 14 from the discharge port 6 at the bottom of the metering tube.

When the electrolyte level in the metering tube moves away from the lower end of the long electrode 8,
The discharge solenoid valve 4 is closed by a signal from the long electrode, and the liquid injection is completed.

When injecting liquid into the next storage battery, it is sufficient to detect that the storage battery has been placed in a predetermined position and open the injection solenoid valve, and when the storage battery is placed at high speed, the discharge solenoid valve 4 must be closed. The injection solenoid valve may be opened at the same time as this, or with an appropriate time lag.

Note that if the injection port is provided at the top of the metering tube, the electrolyte in the metering tube may ripple when the electrolyte flows in, causing the short electrode to malfunction, so it is provided at the bottom of the metering tube.

Furthermore, in order to accommodate various types of storage batteries, the amount of electrolyte supplied to the storage battery is controlled by moving the long electrode 8 in the metering tube up and down.

Effects of the Invention In the conventional liquid injection method using double pipes, it is necessary to insert the liquid injection nozzle into the liquid injection port of the storage battery and maintain the insertion dimension accurately. High precision was required to position the injection nozzle. In addition, the drain passage becomes clogged with foreign matter, requiring periodic cleaning, making it difficult to unattend.

In the device of the present invention, an ordinary vinyl tube can be used as the liquid injection nozzle, and the electrolyte only needs to be dripped from the upper part of the liquid injection port of the storage battery, so the time for positioning the storage battery can be shortened and mechanization is possible. . Additionally, the injection nozzle was no longer clogged, making unmanned operation possible.

[Brief explanation of drawings]

FIG. 1 is a schematic illustration of an electrolyte injection device of the present invention, and FIGS. 2 and 3 are illustrations of a conventional injection device. 1...Service tank 3...Solenoid valve for injection 5...Inlet a...Short electrode 10...\h Pole holding plate 2...Measuring tube 4...Discharge solenoid valve 6...Discharge port 8...Long electrode 12...Storage battery 1 Figure

Claims (2)

[Claims] (1) In addition to placing two long and short electrodes in the measuring tube,
An electrolyte inlet and an outlet are provided at the bottom of the metering tube, the tip of the short electrode is located at the top of the metering tube, the tip of the long electrode is located below the tip of the short electrode, and the tip of the short electrode is located below the tip of the short electrode. The inlet is connected to the electrolyte service tank via a solenoid valve for injection, the outlet is connected to a nozzle for injecting liquid into the storage battery via a solenoid valve for discharge, and the short electrode detects the electrolyte level. An electrolyte injection device for a storage battery, characterized in that the electrolyte injection device for a storage battery is configured such that an injection solenoid valve is closed and a discharge solenoid valve is opened, and when a long electrode separates from the electrolyte surface, the discharge solenoid valve is closed. (2) The electrolyte injection device for a storage battery according to claim (1), wherein the long electrode is movable in the vertical direction.