JP2982368B2 - Battery storage method for lead-acid batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a lead storage battery in a battery case, and more particularly to a method for injecting dilute sulfuric acid having a low specific gravity into a battery case before forming the battery case.

[0002]

2. Description of the Related Art In a method for forming a lead-acid battery in a battery case, dilute sulfuric acid having a specific gravity of about 1.200 is injected before the battery case is formed, and the electrolytic solution is concentrated by electrolysis during the formation and is formed from the electrode plate. There is a method in which the amount of the injected solution is determined in consideration of the amount of sulfuric acid and the battery case is formed, so that the specific gravity of the electrolytic solution after the formation of the battery case becomes a predetermined specific gravity. Also, in order to rationalize the amount of electricity for battery formation,
Dilute sulfuric acid having a low specific gravity of 1.180 or less is injected before the formation of the battery case, and after the formation of the battery case, the chemical electrolyte is removed. Then, sulfuric acid having a high specific gravity of about 1.400 is added, and 50 to 80 A of sulfuric acid is added. There is also a method of continuously recharging with a large current and stirring the electrolyte inside the battery within a short time to adjust the specific gravity of the electrolyte to a predetermined value. At the present time, the latter method is mainly used.

[0003]

In order to rationalize the amount of electricity during battery case formation, the specific gravity of the diluted sulfuric acid to be injected before the above-mentioned battery case formation is made low, and after completion of the battery case formation, the liquid is removed. It is effective to add high specific gravity sulfuric acid and stir by continuous recharging with a large current. However, since rely Stirring method for continuously recharged by a large current, the gas generation at that time is very intense. For this reason, sulfuric acid having a high specific gravity, which is added after dewatering after formation of the battery case, floats on the upper part of the battery, and the low specific gravity electrolytic solution remaining inside the battery is not sufficiently stirred.

[0004] Therefore, there has been a large problem that the specific gravity of the electrolytic solution after the stirring is greatly reduced, and the specific gravity difference between the upper portion and the bottom portion of the electrolytic solution is widened, so that the battery easily becomes a concentration battery.

[0005]

SUMMARY OF THE INVENTION The present invention solves a major problem that the stirring of an electrolytic solution cannot be sufficiently performed when the above-described method is used to rationalize the formation of a battery case. As a specific means, while recharging with a large current, agitating the electrolytic solution by gas generation at that time to bring the specific gravity of the electrolytic solution to a predetermined value, the recharging is performed for 2 seconds or more between energizations. This is a cycle charge in which a pause of less than a second is provided.

[0006]

In other words, in the conventional stirring method of continuously recharging with a large current, since the gas generated by recharging continuously moves to the upper part of the electrolyte, the high-concentration sulfuric acid added after draining removes the electrolyte. Soaring to the top. Therefore, sufficient stirring is not performed with the low-concentration sulfuric acid remaining inside the battery after draining, the specific gravity of the electrolyte after stirring is greatly reduced, and the difference in specific gravity between the upper and lower portions of the electrolyte is also widened, and the battery life becomes a concentration battery and the battery life May be shorter.

On the other hand, according to the present invention, a high-concentration sulfuric acid once soared due to gas generation by putting a pause between current supply during recharging allows the battery to be charged during the pause.
It will sink down to the bottom . Therefore, a region in which low-concentration sulfuric acid and high-concentration sulfuric acid are mixed is formed, and in this state, stirring is performed by recharging, so that sufficient stirring is performed. Thereby, the specific gravity of the electrolytic solution can be prevented from decreasing,
In addition, the difference in specific gravity between the top and bottom of the electrolyte is also eliminated,
The problem of short life due to the concentration battery can also be solved.

[0008]

Embodiments of the present invention will be described below.

First, a battery having a capacity of 5 HR and a capacity of 48 Ah was produced, and then a battery case was formed under the battery forming conditions shown in this battery (Table 1).

[0010]

[Table 1]

After the battery was inverted and drained, a specified amount of sulfuric acid having a specific gravity of 1.400 was injected so that the specific gravity after stirring became 1.280. The re-charging current for stirring is 50 A, and one energizing time is set to 20 seconds, and a pause between energizing times is set to a total energizing time of 120 seconds under various conditions shown in (Table 2). FIG. 1 shows the difference in specific gravity between the top and bottom of the electrolyte immediately after the charging and stirring.

[0012]

[Table 2]

[0013] It a difference in specific gravity is large stirring more downtime as apparent zero seconds, 1 second, 11 seconds A-B-with electrodeposition Kaieki top and bottom E in FIG. 1 has not been sufficiently I understand. This is because there is no pause time or a short period of 1 second, AB, cannot maintain the time for the high-concentration sulfuric acid soaring at the top of the electrolyte to settle to the bottom of the electrolyte. On the other hand, it is presumed that the high concentration sulfuric acid completely settles at the bottom of the electrolytic solution because E has a long resting time, which is too long.

[0014] It can be seen that stirring difference in specific gravity without etc. photons <br/> the top and bottom of the electrolytic solution for C-D of downtime for these two seconds, 10 seconds has been almost completely .

[0015]

As described above, according to the present invention, the specific gravity of the diluted sulfuric acid injected before the conventional battery case formation is set to a low specific gravity, and after the formation, the liquid is removed and high specific gravity sulfuric acid is added to increase the current. This solves the problem of insufficient stirring of the electrolytic solution, which was a major problem in the battery case formation method of continuous recharging and stirring, and rationalizes the case formation.

[Brief description of the drawings]

FIG. 1 is a diagram showing a specific gravity difference between an upper portion and a lower portion of an electrolytic solution according to a rest time during stirring and recharging.

[Explanation of symbols]

 A Pause time 0 sec. B Pause time 1 sec. C Pause time 2 sec. D Pause time 10 sec. E Pause time 11 sec.

────────────────────────────────────────────────── ─── Continuation of the front page (72) The inventor Isami Nagata 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-57-124859 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) H01M 4 / 22,2 / 38,10 / 12

Claims (1)

(57) [Claims] 1. A specific gravity was injected before battery container Kasei 1.180 following dilute sulfuric acid, after draining by inverting the battery after the battery container conversion completion, by injecting specific gravity 1.400 or less of sulfuric acid The battery is recharged, and a low-concentration electrolytic solution remaining inside the battery after the liquid is removed by the gas generation due to electrolysis and a high-concentration electrolytic solution added after the liquid removal are stirred to form a specific electrolytic solution specific gravity. In the method, the recharging is performed for two seconds or more between energizations.
A method of forming a battery case for a lead-acid battery, wherein the battery is cycle-charged with a pause of 0 second or less.