JP2000123859A - Electrolyte injection method of negative electrode absorbing type lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make injection time constant without being influenced by a temperature change by a seasonal change, and to eliminate a fluctuation in performance by reserving heat of a plate group and a battery jar to a temperature of a specific range after housing the plate group in the battery jar, and injecting an electrolyte whose heat is reserved to the same temperature. SOLUTION: A storage battery before injecting an electrolyte assembled by housing a plate group in a battery jar is warmed to 40 to 70 deg.C. After reserving heat of the electrolyte to the same temperature, this electrolyte is injected inside the storage battery. The storage battery before injecting the electrolyte and the electrolyte are held for about 60 to 120 minutes in an atmosphere of 40 to 70 deg.C by, for example, an electric furnace. The electrolyte must be injected before the storage battery before injecting the electrolyte assembled after heating and the electrolyte grow cold to less than 40 deg.C. The electrolyte is desirably injected within 30 minutes. The electrolyte is injected immediately after mixing a gelatinization agent and a dilute sulfuric acid or before fluidity reduces after reserving heat to 40 to 70 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for injecting an electrolyte into a cathode absorption type lead-acid battery, and more particularly to a method for injecting a gel electrolyte into a battery.

[0002]

2. Description of the Related Art As a method of injecting a gel electrolyte in which a gelling agent such as dilute sulfuric acid and silica gel is mixed into a cathode absorption type lead-acid battery, conventionally, a method of spontaneously putting it at atmospheric pressure under normal temperature conditions, or For example, a method of inserting while reducing the pressure is used. However, these methods have a problem that the injection time is long. In addition, in the injection of the gel electrolyte in the cathode absorption type lead-acid battery, the required amount of liquid cannot be added at once, so after injecting a certain amount of liquid,
There is a pause for allowing the electrolyte to penetrate into the battery case, but there is also a problem here. In other words, the required downtime varies depending on the season and the temperature of the day, so the setting of the downtime must be changed for each preparation, and the final injection time is not constant, making the operation complicated. There is a problem that is.

[0003]

According to the present invention, the injection time of the electrolyte can be reduced, and the injection time can be kept constant without being affected by temperature fluctuations due to seasonal changes and the like. An object of the present invention is to provide an electrolyte injection method for a cathode absorption type lead-acid battery, which can stably obtain a battery having small variations in battery performance.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for pouring an electrolyte of a cathode absorption type lead-acid battery, comprising: storing a group of electrodes in a battery case; And injecting the electrolytic solution after keeping the temperature and / or temperature of the electrolytic solution at the same temperature.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention is applied to
It is a cathode absorption type lead storage battery. The electrolyte solution to which the injection method of the present invention is applied is a gel electrolyte solution used for a cathode absorption type lead storage battery, and a commonly used electrolyte such as a mixture of a dilute sulfuric acid and a gelling agent such as silica gel. Applicable to The method of the present invention is to heat the storage battery before electrolyte injection obtained by assembling and assembling the electrode group in a battery case to 40 ° C to 70 ° C, and / or after keeping the electrolyte at the same temperature, It is characterized in that the electrolyte is injected. Below 40 ° C,
The injection time is long, and the obtained batteries have large variations in capacity. On the other hand, when the temperature exceeds 70 ° C., the battery case undergoes thermal deformation. In the present invention, it is preferable that both the storage battery and the electrolyte before the injection of the electrolyte are warmed to 40 ° C to 70 ° C.

In order to maintain the temperature of the storage battery and / or the electrolyte before the injection of the electrolyte at such a temperature, for example, the storage battery and / or the electrolyte may be held in an atmosphere of 40 ° C. to 70 ° C. for about 60 to 120 minutes. Good. After the heating, the storage battery and / or the electrolyte before the injection of the assembled electrolyte is heated to 40 ° C.
Must be done before cooling down. Preferably, it is performed within 30 minutes. After maintaining the temperature at a predetermined temperature in an electric furnace or the like, the temperature of the storage battery and / or the electrolyte solution before the taken out electrolyte solution decreases with the passage of time. . The injection of the electrolyte is performed immediately after mixing the gelling agent and the dilute sulfuric acid, or after keeping the temperature at 40 ° C. to 70 ° C. before the fluidity of the electrolyte is reduced. May go.

As described above, according to the present invention, after the storage battery and / or the electrolyte before the gel electrolyte is injected are maintained at a constant temperature, the gel electrolyte is injected to reduce the working temperature due to seasonal changes. There is no influence, and there is no need for adjustment such as changing the pause time. Further, since the temperature of the electrolytic solution is increased, the fluidity of the electrolytic solution is improved, the permeability of the electrolytic solution into the battery case is increased, and the injection time of the electrolytic solution can be shortened. Since the permeation of the electrolytic solution is also uniform, a battery with small variations in battery performance can be stably obtained.

[0008]

EXAMPLES The present invention will now be described more specifically with reference to examples, but the present invention is not limited thereto. Examples 1 to 4 Using a battery case and a plate group used for a lead storage battery [model MSE200, capacity 200 Ah (10 hour rate)], the plate group was housed in the battery case, and an electrolyte was injected. Not assembled batteries. As shown in FIG. 1, an electric furnace 1 was installed before a liquid injector 2. In the electric furnace 1, the assembled storage battery is
After maintaining the battery in an atmosphere of 40 ° C. to 70 ° C. for 60 minutes and warming the storage battery to 40 ° C. to 70 ° C. as shown in Table 1, after a short circuit test or an airtight test (not shown), a metering pump The gel electrolyte was injected by the liquid injector 2. Table 1 shows the time required to inject the gel electrolyte. The gel electrolyte contains silica gel and dilute sulfuric acid as gelling agents.
It was mixed at a mixing ratio (weight ratio) of 07 / 1.0. About 45 lead storage batteries thus obtained,
After fully charged to 100% charge, 10A at 20A
The battery was discharged for a time, and the voltage at this time was measured to evaluate the variation in the voltage. Table 1 shows the results.

Comparative Examples 1 to 3 The storage batteries before injecting the electrolyte were cooled using a thermostat to
The procedure was performed in the same manner as in Example 1 except that the temperature was kept at 25 ° C. The results are shown in Table 1. Comparative Example 4 The same operation as in Example 1 was performed except that the storage battery before the injection of the electrolyte was heated to 80 ° C. The results are shown in Table 1.

[0010]

[Table 1]

In Examples 1 to 4, the battery temperature at the time of injection was within the range of the present invention, and the injection time, the evaluation of the variation in voltage, and the stability of the battery case were good. In addition, except having used the storage battery of normal temperature, and having used what warmed the electrolyte solution to 40-70 degreeC, when it carried out similarly to the said Example 1-4, injection | pouring time was 2 minutes 30 seconds-3 minutes. Was needed. in this case,
The variation in voltage was almost the same as in Examples 1 to 4.
On the other hand, Comparative Examples 1 to 3 are examples in which the battery temperature at the time of liquid injection was low outside the range of the present invention, and the liquid injection time was long and the voltage variation was large. Comparative Example 4 was an example in which the battery temperature at the time of liquid injection was high outside the range of the present invention, and the battery case was subjected to thermal deformation.

[0012]

According to the electrolytic solution pouring method of the present invention, the pouring time of the electrolytic solution can be shortened, and the pouring time can be kept constant without being affected by temperature fluctuation due to seasonal changes. As a result, a battery with less variation in battery performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a liquid injection method in an example.

[Explanation of symbols]

 1 electric furnace 2 filling machine 3 storage battery before electrolyte injection

Claims (1)

[Claims] In the injection of an electrolytic solution for a cathode absorption type lead-acid battery, after the electrode group is housed in a battery case, the electrode group and the battery case are kept at 40 ° C. to 70 ° C. and / or the electrolytic solution is And injecting the electrolytic solution after maintaining the temperature at the same temperature.