JPH0218929Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an electrolyte filling device for a battery, and particularly to an electrolytic solution filling device suitable for use in filling a sealed battery with an electrolytic solution.

BACKGROUND ART FIG. 1 shows a so-called maintenance-free sealed battery. In the figure, 1 is a battery case, 2 is a battery case lid that covers the battery case 1, and these constitute the battery body. 3 is an anode plate made of lead and a lead-calcium alloy, two pieces per cell; 4 is a cathode plate made of lead and a lead-calcium alloy, three pieces per cell; 5 is an anode plate, between the positive and cathode plates 3 and 4. A linear separator made of glass fiber with a wire diameter of 1 μm or less is placed on the poles, 6 and 7 are pole pillars that are respectively straddled over the two anode plates 3 and the three cathode plates 4, and 8 and 9 are the anode poles. , is the cathode terminal. 10
11 is a gas exhaust part provided in the center of the upper surface of the battery body to discharge the gas exhausted from these exhaust holes 10 to the outside of the battery body; 12 is a gas exhaust part provided for each cell; This is an outer lid that is attached to the upper surface of the battery body to cover the part 11.

In the gas discharge part 11, a recess 13 is provided in the center of the battery case lid 2, and as is particularly clear from FIG. is formed. This cylindrical part 1
A plurality of notches 15 are formed at the upper end of 4. A rubber valve 16 is mounted on the cylindrical portion 14, and a filter 17 made of ceramic is attached to the opening step of the recess 13, and is held down by the outer lid 12. A gas outlet groove 18 extending in the longitudinal direction of the outer cover 12 and opening on the side of the battery body is formed on the back surface of the outer cover 12. Discharge hole 10 (first illustration)
When the internal pressure increases, the gas discharged from the cylinder passes through the notch 15 of the cylindrical part 14, expands the base of the rubber valve 16, flows out into the recess 13, passes through the filter 17, and enters the gas outlet groove 18 of the outer cover 12. After that, it is discharged to the outside.

This sealed battery consists of, for example, six cells, and injection ports 19a to 19f for injecting electrolyte into each cell are formed on the upper surface of each cell. When each cell is filled with electrolyte, caps 20a to 20f connected to each other are attached to each injection port 19a to 19f to seal the battery.

The sealed battery with this configuration has a rubber valve 16 in the middle of the gas exhaust passage to have a completely sealed structure that prevents water from evaporating in the electrolyte, and maintains the cathode plate in a discharged state for water splitting. In addition to preventing hydrogen gas from being emitted, the cathode plate is exposed to oxygen gas generated from the anode plate and this oxygen gas is absorbed by the cathode plate, which is the so-called oxygen cycle, which eliminates the need for water replenishment. . In addition, by using a calcium alloy electrode plate, the formation of an electrode battery due to antimony elution in the electrode plate is prevented, and the amount of self-discharge is suppressed, thereby eliminating the need for supplementary charging when left unused for a long period of time. Furthermore, a fine glass mat prevents the electrolyte from flowing out.

When injecting electrolyte into this sealed battery,
In conventional batteries, in which the electrolyte was injected into each cell using a dropper, etc., the amount of injected liquid could be confirmed from the outside, but in the case of batteries in which the electrolyte was absorbed into the separator 5, The amount of liquid can only be confirmed before injection, and since an electrolyte with a higher specific gravity than conventional electrolytes is used exclusively, it is necessary to prevent misuse of conventional electrolytes.

Summary of the invention Therefore, an object of the present invention is to provide an electrolyte filling device for a battery that has excellent workability and can uniformly fill each cell with electrolyte.

In the battery electrolyte filler according to the present invention, the liquid passages of each liquid injection part in a plurality of independent packages are each filled with approximately the same amount of electrolyte and are connected to each other with the tips of each liquid injection part sealed. A cylindrical flow rate adjustment valve is provided inside, and the end of the flow rate adjustment valve on the tip side of the liquid injection part is closed.
At the time of liquid injection, by cutting the liquid injection part of the package and the closing part of the flow rate regulating valve, the closing part of the flow rate regulating valve opens and becomes ready for liquid injection.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

In FIG. 3, an electrolyte filling device 3 according to the present invention is shown.
0 is for filling each cell of the sealed battery mentioned above with electrolyte, and 6 corresponding to each cell is used.
It has independent packages 31a to 31f. These packages 31a to 31f are made of resin, have substantially the same volume, and are connected to each other. Each of the packages 31a to 31f is filled with approximately the same amount of electrolyte, and the tips of each of the liquid injection portions 32a to 32f are sealed, for example, by thermal welding. In the liquid passages 33a to 33f of each liquid injection part 32a to 32f, in order to prevent the electrolyte from overflowing from the battery injection ports 19a to 19f (see Fig. 1) when filling the electrolyte as described later. Regulating valves 34a to 34f are provided to adjust the injection speed of the electrolytic solution.

The regulating valves 34a to 34f have a hollow cylindrical shape with one end closed, and are made of, for example, a rubber material. Then, the closed end is the liquid injection part 32a to 3
Liquid injection parts 32a to 3 are located on the tip side of 2f.
2f are arranged in each of the liquid passages 33a to 33f.
Stoppers 35a to 35f are provided on the package body side within the liquid passages 33a to 33f.
These stoppers 35a to 35f are integrally molded with the regulating valves 34a to 34.
It acts to prevent the movement of f towards the package body side.

Each liquid injection part 32a of package 31a to 31f
When the tip of 32f is sealed by thermal welding, a space in which electrolyte can accumulate will inevitably be created between the welded portions 36a to 36f and the closed ends of the regulating valves 34a to 34f, but as described above, Like adjustment valve 34
One end of a to 34f is sealed to block the liquid passage, and this closed end acts to prevent the electrolyte from moving into the space, so the electrolyte moves during transportation and accumulates in the space. This will allow you to prevent problems from occurring.

When filling a battery with electrolyte using the electrolyte filler 30 having such a configuration, first, as shown by the dashed line in FIG. Cut using the following tool. As a result, the regulating valve 34a
~34f is also cut at the intermediate portion at the same time, allowing the previously blocked liquid passage to pass through. and,
As shown in FIG. 4, by inserting each of the liquid injection parts 32a to 32f into the battery injection ports 19a to 19f, each cell is uniformly filled with the electrolytic solution. After inserting each liquid injection part 32a to 32f into the battery injection port 19a to 19f, each package 31
Air inlets 37a to 37f at the rear end of a to 31f
By forming this, it is possible to quickly fill the electrolyte.

In addition, as shown in FIG. 5, the regulating valves 34a to 34
By forming grooves 38a to 38f all the way around the intermediate peripheral wall of f, these grooves 38a to 38f form liquid injection parts 32a to 32 of packages 31a to 31f.
This serves as a mark indicating the cutting position when cutting f, and since the groove portions of the regulating valves 34a to 34f are thin, cutting can be performed more easily. Further, instead of forming the grooves 38a to 38f in the regulating valves 34a to 34f, marks such as lines may be attached to the peripheral walls of the regulating valves 34a to 34f or the liquid injection parts 32a to 32f.

Effects As explained above, according to the present invention, a cylindrical tube provided in the liquid passage of each liquid injection part in a plurality of independent packages each containing approximately the same amount of electrolyte and connected to each other. Since the tip of the flow rate adjustment valve is closed, the electrolyte will not move through the valve during transportation, and the flow rate adjustment valve can be closed by simply cutting off each liquid injection part and the closing part of the flow rate adjustment valve. Since the closed portion of the cell is opened and liquid can be injected, each cell can be easily and uniformly filled with electrolyte, thereby providing an electrolyte filler for batteries with excellent workability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view including a partially broken surface showing a sealed battery, Fig. 2 is a sectional view of the main part of Fig. 1, Fig. 3 is a sectional view showing an embodiment of the present invention, and Fig. 4 is a sectional view of the main part of Fig. 1. FIG. 5 is a cross-sectional view showing another embodiment of the present invention. Explanation of symbols of main parts, 30... Electrolyte filler, 31a to 31f... Package, 32a to 3
2f...Liquid injection part, 34a-34f...Flow rate adjustment valve, 38a-38f...Groove.

Claims (1)

[Scope of utility model registration request] a plurality of independent packages each filled with approximately the same amount of electrolyte and connected to each other with the tip of each liquid injection part sealed; and a cylinder provided in the liquid passage of each liquid injection part in the plurality of packages. The flow rate regulating valve has a distal end of the liquid injection part that is closed, and is cut integrally with the liquid injection part of the package during liquid injection. An electrolyte filler for a battery, characterized in that the closed portion opens and becomes ready for injection.