JP2974588B2 - Function-maintaining / restoring agent for lead-acid battery and electrolyte for lead-acid battery using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery function maintaining / restoring agent for maintaining and recovering the function of a lead-acid battery for a long period of time and improving power storage efficiency, and a lead-acid battery electrolyte using the same.

[0002]

2. Description of the Related Art As a method for maintaining and recovering the function of a reduced lead storage battery, a method of adding a water-soluble vitamin to an electrolytic solution (JP-A-52-72428, JP-A-54-7134),
A method of adding an organic acid such as a dicarboxylic acid or a tricarboxylic acid (JP-A-53-10827), a method of adding germanium sesquioxide of bis-β-ethylcarboxylic acid (JP-A-59-194367, JP-A-63-19771) is known.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a lead storage battery function-maintaining / restoring agent capable of maintaining the storage capacity of a lead storage battery and improving the charging effect during charging, and an electrolyte for a lead storage battery using the same. The purpose is to provide.

[0004]

The first aspect of the present invention is a function-maintaining / restoring agent for a lead-acid battery containing a metal sulfate and an amino acid or a salt thereof as an active ingredient, and the second aspect of the present invention is the lead-acid battery. It is an electrolyte solution for a lead storage battery to which a function maintaining and recovering agent is added. The metal sulfate used in the present invention is a component for maintaining the specific gravity of the electrolytic solution at the same time as maintaining the sulfuric acid concentration, and may be any metal sulfate that exhibits the effects of the present invention, for example, sodium sulfate, Light metal salts such as magnesium sulfate and aluminum sulfate, and heavy metal salts such as cobalt sulfate, barium sulfate, manganese sulfate, ferrous sulfate, and ferric sulfate. These metal sulfates may be used as a mixture of two or more kinds.

The amino acid used in the present invention is a compound having a carboxyl group and an amino group in the same molecule and may be any compound as long as it exerts the effects of the present invention, but is preferably an α-amino acid, and is preferably glutamic acid. And acidic amino acids such as aspartic acid. Further, these amino acids may be salts such as metal salts such as sodium salt, potassium salt, magnesium salt, calcium salt and aluminum salt, and may be any of L-form, D-form and mixtures thereof.

The mixing ratio of the metal sulfate and the amino acid or a salt thereof in the function-maintaining / restoring agent for a lead storage battery of the present invention is preferably 5 to 95 parts by weight of a metal sulfate or 5 to 95 parts by weight of an amino acid or a salt thereof. . If the compounding ratio of the metal sulfate is less than the lower limit, it is difficult to absorb the gas generated from the positive electrode plate in the final stage of charging by the negative electrode plate,
If the upper limit is exceeded, gas generation and absorption reaction on the positive and negative electrode plates are difficult to be performed. The mixing ratio of the metal sulfate and the amino acid or a salt thereof is more preferably 10 to 60 parts by weight of the metal sulfate or 40 to 90 parts by weight of the amino acid or the salt thereof.

[0007] The function-maintaining / restoring agent for a lead-acid battery of the present invention may contain a metal carbonate in order to further enhance the function-maintaining / restoring effect of the lead-acid battery. Examples of the metal carbonate used here include alkali metal salts such as sodium carbonate and potassium hydrogen carbonate, and alkaline earth metal salts such as magnesium carbonate. These metal carbonates may be used in combination of two or more. The mixing ratio of the metal carbonate is usually 0.1 to 80% by weight, preferably 1 to 70% by weight, based on the amino acid or a salt thereof.

The function-maintaining / restoring agent for a lead-acid battery of the present invention includes:
In order to further enhance the function-maintaining / restoring effect of the lead-acid battery, a known function-maintaining / restoring agent for a lead-acid battery such as vitamin C and citric acid may be added. The lead storage battery function maintenance / recovery agent of the present invention may be used in any of solid, liquid and semi-solid forms. In the case of a solid, it is preferably used in the form of powder or granules, and in the case of a liquid, it is preferably used by dissolving in dilute hydrochloric acid, dilute sulfuric acid or water. In the liquid, a metal sulfate and an amino acid or a salt thereof are combined, usually in the range of 2 to 95%.
%, Preferably 5 to 80% by weight. The specific gravity of the liquid is usually from 1.15 to 1.4.

The lead-acid battery function restoring agent of the present invention may be added to the electrolytic solution before filling the electrolytic cell of the lead-acid battery,
It may be added to the electrolytic solution filled in the electrolytic cell of the lead storage battery. The function-maintaining / restoring agent for a lead-acid battery is such that the metal sulfate and the amino acid or a salt thereof contained in the electrolytic solution are combined so that the total amount is usually 0.7 to 3% by weight, preferably 1 to 2% by weight of the electrolytic solution. Added. The specific gravity of the electrolyte in the lead-acid battery when the function-maintaining / restoring agent for the lead-acid battery is added is usually from 1.15 to
1.4, preferably 1.25 to 1.35.

In the electrolyte for a lead-acid battery of the present invention, a metal sulfate and an amino acid or a salt thereof are combined, usually 0.7 to 3% by weight, preferably 1-2% by weight of the electrolyte for a lead-acid battery.
included. The specific gravity of the electrolyte for a lead storage battery of the present invention is usually from 1.15 to 1.4, preferably from 1.25 to 1.35. The lead-acid battery electrolyte solution of the present invention is obtained by dissolving the lead-acid battery function retention / restoring agent in the lead-acid battery electrolyte stock solution and uniformly mixing and stirring.

The electrolyte solution for a lead-acid battery according to the present invention may be any one, such as dilute sulfuric acid, which is commonly used as an electrolyte solution for a lead-acid battery. If the storage battery function is significantly reduced and the required power cannot be supplied to the lead storage battery, the lead storage battery function maintenance / recovery agent of the present invention is added, or the lead storage battery electrolyte solution of the present invention is injected into the lead storage battery electrolytic cell. The function of the storage battery can be restored. Also, if the lead-acid battery function maintenance / recovery agent is added to a lead-acid battery that can supply the required power initially even if the storage battery function is reduced, the power supply of the lead-acid battery can be maintained for a longer time in normal use. it can.

[0012]

The present invention will be described more specifically with reference to the following examples and test examples, but the scope of the present invention is not limited to these examples. Example 1 100 g of L-glutamic acid and 100 g of magnesium sulfate were uniformly mixed and pulverized while being ground in a mortar to produce 200 g of composition 1.

Example 2 100 g of L-glutamic acid,
80 g of aluminum sulfate and 20 g of magnesium carbonate were uniformly mixed and pulverized while being ground in a mortar to give composition 2 as 2
00 g was produced. Example 3 Composition 1 (6 g) was treated with 2.3% by weight of dilute sulfuric acid 10
It was dissolved in 0 ml to obtain Composition 3. The specific gravity of the composition was 1.26.

Example 4 Composition 2 (8 g) was dissolved in 100 ml of 3.0% by weight dilute sulfuric acid to obtain composition 4. The specific gravity of the composition was 1.26. Example 5 A composition 5 was obtained in the same manner as in Example 1 except that L-aspartic acid was used instead of L-glutamic acid.

Example 6 A composition 6 was obtained in the same manner as in Example 2 except that L-aspartic acid was used instead of L-glutamic acid. (Examples 7 to 13) A composition was prepared in the same manner as in Example 1 except that sodium sulfate, aluminum sulfate, cobalt sulfate, barium sulfate, manganese sulfate, ferrous sulfate or ferric sulfate was used instead of magnesium sulfate. 7-13 were obtained. The relationship among the example number, the composition number and the metal sulfate used is shown below.

[0016] (Examples 14 and 15) Compositions 14 and 15 were obtained in the same manner as in Example 2 except that sodium sulfate or magnesium sulfate was used instead of aluminum sulfate.

(Example 16) L-glutamic acid 100
g, aluminum sulfate 70 g, magnesium carbonate 20
g, 9 g of oxalic acid and 1 g of germanium oxide are ground and uniformly mixed and ground in a mortar to give 200 g of composition 16.
Manufactured. (Example 17) 160 g of L-glutamic acid, 25 g of aluminum sulfate, 5 g of magnesium carbonate, 9 g of oxalic acid and 1 g of germanium oxide were uniformly mixed and pulverized while grinding in a mortar to prepare 200 g of composition 17.

(Test Example 1) Addition test to lead-acid battery 1 A 10-gram each of composition 1, magnesium sulfate, citric acid or vitamin C was added to the electrolyte of a used 6V lead-acid battery for automobiles (Hitachi 6B x 8-3B). (Control is dilute sulfuric acid only), 6V using a charger (Nihon Battery GS SP1-75-15A)
After charging for 30 minutes, the tail lamp of 6V25W was turned on to discharge. The battery was charged again at 6 V for 10 minutes using a charger, and a lighting experiment was performed using a tail lamp of 6 V and 25 W, and a voltage drop with respect to time under each condition was examined.
The results are shown in FIG.

As apparent from FIG. 1, the highest recovery effect was obtained when the composition 1 was added. (Test Example 2) Addition test to lead storage battery 2 Composition 2, aluminum sulfate, magnesium carbonate or 10 g each of L-glutamic acid were added to the electrolyte of a used 6V lead storage battery for automobile (Hitachi 6B x 8-3B) (control). Is dilute sulfuric acid only), charger (Nihon Battery GS SP1-75-15)
After charging at 6 V for 30 minutes using A), a 6 V 25 W tail lamp was turned on to discharge. Again, using the charger,
After charging at 6 V for 10 minutes, a lighting experiment was performed using a 6 V 25 W tail lamp, and the voltage drop with respect to time under each condition was examined. The result is shown in FIG.

As apparent from FIG. 2, the highest recovery effect was obtained when the composition 2 was added. (Test Example 3) Addition test 3 to lead storage battery 12 V lead storage battery for automobile (Hitachi 42B20
To the electrolytic solution of R), 10 g each of composition 16, composition 17, L-glutamic acid, aluminum sulfate, magnesium carbonate, oxalic acid or germanium oxide was added (control is only dilute sulfuric acid), and a battery charger (Hitachi PANB-24-) was added. 15)
The battery was charged at 12 V, and the rise in voltage with respect to time under each condition was examined. The results are shown in FIG.

As apparent from FIG. 3, a high charging effect was obtained when the composition 16 or the composition 17 was added. (Test Example 4) Addition test 4 to lead storage battery 12 V lead storage battery for automobile (Hitachi 42B20
To the electrolytic solution of R), 10 g each of composition 16, composition 17, L-glutamic acid, aluminum sulfate, magnesium carbonate, oxalic acid or germanium oxide was added (control is only dilute sulfuric acid), and a battery charger (Hitachi PANB-24-) was added. 15)
After charging at 12V for 30 minutes, the tail lamp of 12V50W was turned on to discharge. The battery was charged again at 12 V for 10 minutes using a charger, and a lighting experiment was performed using a tail lamp of 12 V and 50 W, and the voltage drop with respect to time under each condition was examined. FIG. 4 shows the results.

As is clear from FIG. 4, when the composition 16 or the composition 17 was added, a high electricity storage effect was obtained. (Test Example 5) Lead-Acid Battery for Automobiles The engine was not easy to operate, and the lead-acid battery (12V20-70Ah) would rise if it did not ride for 1-2 days, and the composition 1 was applied to a car that had been charged many times. When 6 g was added to each of the tanks of the lead storage battery (400 ml of electrolyte) and charged, the startability was improved and the engine could be started with a single shot even if the user did not ride for two days.

(Test Example 6) Lead-acid battery for motorcycles A lead-acid battery (6V3 to 18Ah) whose discharge made it impossible to start the engine of the motorcycle,
When the lead-acid battery was charged without adding anything, the engine of the motorcycle could not be started on the day after charging, whereas the lead-acid battery was charged after adding 3 g of Composition 1 to the electrolytic cell. In that case, the engine of the stopped motorcycle could be started for a week.

(Test Example 7) Lead-acid battery for golf cart A lead-acid battery (12 V) that could not travel around the golf course one round even if charged daily with a golf cart (Furukawa EB-65) driven by a lead-acid battery. ), The composition 2, the composition 5 or the composition 6 was placed in the electrolytic cell of the lead storage battery (the amount of the electrolytic solution was 600 ml).
Was added and charged, and all the compositions were able to travel around the golf course once.

(Test Example 8) Lead-acid battery for forklift A lead-acid battery (Hitachi 48D26R) whose discharge has made it impossible to start the engine of the forklift (Komatsu FG10) was charged without adding anything to the lead-acid battery. Starts the stopped forklift engine 5
While it could only be started for months,
Composition 7 was placed in each tank (400 ml of electrolyte) of the lead storage battery.
When charging was performed after adding g, it could be started for 8 months.

[0026]

According to the present invention, there is provided a lead storage battery function maintenance / recovery agent having a high maintenance / recovery effect for a lead storage battery having a reduced storage capacity, and an electrolyte for a lead storage battery using the same.

[Brief description of the drawings]

FIG. 1 is a diagram showing the effect of various additives on the power storage (discharge) effect of a lead storage battery.

FIG. 2 is a diagram showing the effect of various additives on the power storage (discharge) effect of a lead storage battery.

FIG. 3 is a diagram showing the effect of various additives on the power storage (charging) effect of a lead storage battery.

FIG. 4 is a diagram showing the effect of various additives on the power storage (discharge) effect of a lead storage battery.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01M 10/54 H01M 10/08 A61K 31/00

Claims (6)

(57) [Claims] 1. A function-maintaining / restoring agent for a lead storage battery, comprising a metal sulfate and an acidic amino acid or a salt thereof as active ingredients. 2. The metal sulfate according to claim 1, wherein the metal sulfate is at least one selected from the group consisting of sodium sulfate, magnesium sulfate, aluminum sulfate, cobalt sulfate, barium sulfate, manganese sulfate, ferrous sulfate and ferric sulfate. Functional maintenance and recovery agent for lead-acid batteries. 3. The function-maintaining / restoring agent according to claim 1, wherein the acidic amino acid is at least one selected from the group consisting of aspartic acid and glutamic acid. 4. The function-maintaining / restoring agent for a lead storage battery according to claim 1, further comprising a metal carbonate. 5. The function-maintaining / restoring agent for a lead storage battery according to claim 4, wherein the metal carbonate is magnesium carbonate. 6. An electrolyte solution for a lead-acid battery, to which the function-restoring agent for a lead-acid battery according to any one of claims 1 to 5 is added.