JP4488696B2 - Lead storage battery inspection equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a storage battery inspection device that inspects a short circuit state of a storage battery after battery case formation.
[0002]
[Prior art]
In general, a lead storage battery has a structure in which a plurality of cells in which a positive electrode and a negative electrode are arranged in a sulfuric acid electrolyte solution are connected in series. The positive electrode is a lead alloy lattice substrate filled with an active material of lead peroxide, and the negative electrode is a lead alloy lattice substrate filled with an active material of spongy metallic lead. In general, lead peroxide as the active material of the positive electrode and spongy metal lead as the active material of the negative electrode are mainly made of lead oxide and lead sulfate, respectively. It becomes lead oxide, and the active material of the negative electrode becomes spongy metallic lead.
[0003]
By the way, in the battery case formation process of the above lead acid battery, the short circuit between electrode plates may generate | occur | produce. This short circuit includes a severe short circuit that does not generate an electromotive force between the two electrodes, and a short circuit that can be left for several days after forming the battery case to show a voltage drop.
[0004]
As a method for detecting a short circuit of a lead storage battery, a method of applying a voltage between electrode plates before battery case formation (see Patent Document 1), a method of measuring the pressure or amount of gas generated in each cell during charging (See Patent Document 2) and the like. Patent Document 2 also describes a method for measuring the open voltage between the two electrode terminals and a method for measuring the specific gravity of the electrolyte after completing the charging of the lead storage battery as the prior art.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 4-138673 [Patent Document 2]
Japanese Patent Laid-Open No. 57-196481 [0006]
[Problems to be solved by the invention]
However, the technique described in Patent Document 1 has a problem that it is impossible to detect a short circuit state between electrode plates after the formation of the battery case. Further, the technique described in Patent Document 2 has a problem that it is difficult to accurately measure the pressure and amount of gas.
[0007]
Then, an object of this invention is to provide the inspection apparatus of the lead storage battery which can detect the short circuit state between the electrode plates after battery case formation in a short time.
[0008]
[Means for Solving the Problems]
The invention of claim 1 sets the specific gravity of the electrolyte before battery case formation small so that the specific gravity of the electrolyte after battery case formation becomes a predetermined value, and the electrolyte solution of the lead storage battery after battery case formation In the lead storage battery inspection device that inspects the short circuit state in each cell of the lead storage battery by measuring the specific gravity, the electrolyte specific gravity measuring means for measuring the specific gravity of the electrolyte of the lead storage battery is the number of cells of the lead storage battery. The electrolyte solution specific gravity measuring means connected to the electrolyte specific gravity measuring means, and the electrolyte specific gravity measuring means for introducing the electrolyte solution in the lead storage battery into the electrolyte solution specific gravity measuring means. It has the function to introduce in a batch into each electrolyte solution specific gravity measuring means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
[0010]
FIG. 1 is a schematic side view showing a state where an inspection apparatus for a lead storage battery according to an embodiment of the present invention is attached to a storage battery, FIG. 2 is a schematic front view corresponding to FIG. 1, and FIGS. FIG. 2 is a schematic top view corresponding to FIG. 1.
[0011]
1 to 4, 1 is a lead storage battery, 11 is a terminal, and 12 is a cell. The lead storage battery 1 has six cells 12 connected in series.
[0012]
1 to 4, reference numeral 2 denotes a specific gravity detection device as an electrolyte specific gravity measuring means, and the specific gravity detection device 2 is the same as the number of cells 12 and detects the specific gravity of the electrolyte in each cell 12. Be able to. The specific gravity detection device 2 includes a connecting pipe 21 that connects each cell 12 of the storage battery 1 and the specific gravity detection device 2, and a specific gravity meter 22 that can move up and down within the specific gravity detection device 2. In addition, 23 is the electrolyte solution sucked up from the lead storage battery 1, and 24 is the liquid level of the electrolyte solution 23.
[0013]
1 to 4, reference numeral 3 denotes an electrolytic solution introduction device as an electrolytic solution introduction means for introducing an electrolytic solution into the specific gravity detection device 2, and 4 denotes a connecting pipe that connects the specific gravity detection device 2 and the electrolytic solution introduction device 3. It is.
[0014]
The electrolytic solution introduction device 3 includes a cylinder 31 connected to the specific gravity detection device 2. The cylinder 31 has a piston shaft 31a that reciprocates, and a head 31b at one end of the piston shaft 31a inside the cylinder 31. The cylinder 31 is open to the outside air on the piston shaft 31a side of the head 31b.
[0015]
Here, as illustrated in FIG. 3, the number of cylinders 31 of the electrolyte introduction device 3 is the same as the number of specific gravity detection devices 2, and each cylinder 31 is connected to the specific gravity detection device 2 on a one-to-one basis. As illustrated in FIG. 4, one cylinder 31 may be collectively connected to each specific gravity detection device 2 through the connecting pipe 4.
[0016]
The electrolyte introduction device 3 also includes a drive cylinder 32 for operating the piston shaft 31a of the cylinder 31, and the drive cylinder 32 is a reciprocating piston shaft 32a and the drive cylinder of the piston shaft 32a. 32 has a head 32b at one end inside. The drive cylinder 32 is provided with an electromagnetic valve 33 to drive the piston shaft 32a with air or the like. The piston shaft 31a and the piston shaft 32a are connected by a connecting body 34. Here, as illustrated in FIGS. 1 and 3, each piston shaft 31 a may be connected to one piston shaft 32 a via a coupling body 34, and as illustrated in FIG. The single piston shaft 31 may be connected to the single piston shaft 32 a via the coupling body 34.
[0017]
Hereinafter, an example of the operation state of the electrolytic solution introduction device 3 will be described with reference to FIGS. 1 and 3. First, the driving cylinder 32 is operated by the electromagnetic valve 33, and the piston shaft 32a moves to the right side in FIG. 1 (upper side in FIG. 3). The piston shaft 32a moves each piston shaft 31a to the right side in FIG. 1 (upper side in FIG. 3) via the coupling body 34, and each head 31b moves inside each cylinder 31 to the right side in FIG. 1 (upper side in FIG. 3). Move.
[0018]
Next, detection of the specific gravity of the electrolytic solution 23 in the specific gravity detection device 2 will be described with reference to FIGS. 1 and 2. As the heads 31b move as described above, the air in the specific gravity detection device 2 is pulled upward in FIG. 1 and FIG. 2, and the electrolyte solution 23 in each cell 12 of the lead storage battery 1 is in FIG. 1 and FIG. Pulled to liquid level 24. And the specific gravity of the electrolyte solution 23 can be detected by the hydrometer 22 in the specific gravity detection device 2 floating in the electrolyte solution at a predetermined scale position and detecting this visually.
[0019]
As mentioned above, although an example of the inspection apparatus of the lead storage battery which is embodiment of this invention was demonstrated, embodiment of this invention is not restricted to this.
[0020]
In addition to using a lead storage battery inspection device according to an embodiment of the present invention, in addition to a severe short circuit that does not generate an electromotive force between the two electrodes, it can be left to stand for several days after the battery is formed, and a decrease in voltage can be seen. Even a slight short circuit can be detected. An example will be described below.
[0021]
Lead peroxide, which is the active material of the positive electrode before the formation of the battery case, and spongy metal lead, which is the active material of the negative electrode, are mainly made of lead oxide and lead sulfate. Becomes lead peroxide, and the active material of the negative electrode becomes spongy metallic lead. In this battery case formation step, the sulfuric acid content in the active material is released into the electrolyte solution. Therefore, the specific gravity of the electrolyte solution before battery case formation is such that the specific gravity of the electrolyte solution after battery case formation becomes a predetermined value. By setting the value small, it is possible to eliminate the need to exchange the electrolyte.
[0022]
If the specific gravity of the electrolyte before battery case formation is set small, the specific gravity of the electrolyte after battery case formation will hardly change if a severe short circuit occurs between the electrode plates. When a slight short circuit occurs between the plates, the rate of change in the specific gravity of the electrolytic solution after battery case formation becomes small, so by detecting the specific gravity of the electrolytic solution after battery case formation, Can be detected.
[0023]
Actually, the active material of both electrodes was selected so that the specific gravity of the electrolytic solution before forming the battery case was 1.230 (20 ° C., the same applies hereinafter) and the specific gravity of the electrolytic solution after forming the battery case was 1.280. The specific gravity of the electrolyte after the formation of the battery case when a severe short circuit occurs between the electrode plates is 1.230 to 1.250, and the battery case when a slight short circuit occurs between the electrode plates The specific gravity of the electrolytic solution after chemical conversion was 1.260 to 1.270, and it was possible to detect a short circuit between the electrode plates using the lead storage battery inspection device according to the embodiment of the present invention.
[0024]
Moreover, when the lead acid battery whose specific gravity of the electrolyte solution after battery case formation is 1.260-1.270 was left for 48 hours, all the battery voltage fell to 12.50-12.70V, and it was mild. It was confirmed that a short circuit had occurred.
[0025]
Moreover, the time required to test | inspect the short circuit state of lead acid battery using the test | inspection apparatus of lead acid battery which is embodiment of this invention is several seconds-10 by one measurement in the state illustrated in FIGS. It is several seconds, and a short circuit of the lead storage battery can be detected in a short time regardless of the degree thereof, and the time shortening effect for detecting a light short circuit is particularly great.
[0026]
【The invention's effect】
As described above, according to the present invention, the electrolytic solution specific gravity measuring means for measuring the specific gravity of the electrolytic solution of the lead storage battery is provided in the same number as the number of cells of the lead storage battery, and connected to the electrolytic solution specific gravity measuring means. An electrolytic solution introducing means for introducing the electrolytic solution in the storage battery is provided, and the electrolytic solution introducing means has a function of collectively introducing the electrolytic solution in the lead storage battery to each electrolytic solution specific gravity measuring means. The short circuit of the lead storage battery after chemical conversion can be detected in a short time, and the effect of shortening the time for detecting a light short circuit in particular is increased.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an example of a state in which a lead storage battery inspection device according to an embodiment of the present invention is attached to a storage battery.
FIG. 2 is a schematic front view corresponding to FIG. 1;
FIG. 3 is a first example of a schematic top view corresponding to FIG. 1;
FIG. 4 is a second example of a schematic top view corresponding to FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lead acid battery 2 Specific gravity detection apparatus 3 Electrolyte introducing apparatus 4 Connecting pipe 11 Terminal 12 Cell 21 Connecting pipe 22 Hydrometer 23 Electrolytic solution 24 Liquid level 31 Cylinder 31a, 32a Piston shaft 31b, 32b Head 32 Driving cylinder 33 Electromagnetic valve 34 Connected body

Claims (1)

By setting the specific gravity of the electrolytic solution before the formation of the battery case to be small so that the specific gravity of the electrolytic solution after the formation of the battery case becomes a predetermined value, the specific gravity of the electrolytic solution of the lead storage battery after the formation of the battery case is measured. In the lead storage battery inspection device for inspecting a short circuit state in each cell of the lead storage battery, the electrolyte specific gravity measuring means for measuring the specific gravity of the electrolyte of the lead storage battery is provided in the same number as the number of cells of the lead storage battery, and the specific gravity of the electrolyte Electrolytic solution introduction means connected to the measurement means to introduce the electrolytic solution in the lead storage battery into the electrolytic solution specific gravity measurement means, and the electrolytic solution introduction means converts the electrolytic solution in the lead storage battery into each electrolytic solution specific gravity measurement means. Lead-acid battery inspection device characterized by having a function to be introduced into a batch.

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