JPS58186166A - Positive electrode plate for ready-use type lead storage battery - Google Patents

Abstract

PURPOSE:To prevent a positive electrode plate from being deteriorated as well as to aim at improvement in storage capabilities for a long period of time, by adding a specific quantity of silica gel to an active material. CONSTITUTION:Fine powder of silica gel is added to lead powder and mixed well, while a paste-like substance made up of adding water and sulfuric acid to this mixture and being kneaded is used for filling up a pole base plate and then a positive electrode plate is secured through the conventional process. If the amount of silica gel added is 0.1% or less, the adsorbability of silica gel is very poor whereby there is a lesser effect during storage, but if it exceeds the range of 1.0%, its effect is lost anyway due to a drop in electric conductivity, so that there is necessary to limit the addition of silica gel to the range of 0.1-1.0wt%.

Description

[Detailed description of the invention] It is something that

Conventional ready-to-use storage batteries are sealed, but their ready-to-use performance deteriorates when stored for a long period of time.

The reason for this is mainly due to deterioration of the positive electrode plate.

This ready-to-use positive electrode plate is manufactured by first making a plastic plate using a water injection method and then using a single plate plastic process.

In this case, the anode active material produced by mK is mainly PbO
2, moisture (humidity) acts during storage to form a film with low electrical conductivity between the active material and the substrate lattice or within the active material, resulting in a decrease in battery performance.

Therefore, a serious modification was proposed for the conventional water injection type lead-acid battery. The one that filled it and put it in the battery improvement part was published in 1977.
-41890, and the silicic acid or aluona station is made by adding phosphoric acid to titanium oxide powder to form a paste, or drying it to form a powder, which is present inside the battery and watered during use. Monoga Tokko 1978-7
It is described in Publication No. 378. However, none of these efforts were made to improve the anode plate. Again! JP-A-56-109459 discloses a structure in which a porous silica material whose surface is coated with graphite is added as an electrode plate, but this is not intended for ready-to-use lead-acid batteries.

In view of the current situation, the present invention has been made through intensive research and has resulted in the discovery of an anode plate for ready-to-use lead-acid batteries that can prevent deterioration similar to that of a ferrule and can be stored for a long period of time while preventing a decline in performance. That is, in the active material [0. 1-1. It is characterized by the addition of 1% O-ITI silica dal.

The present invention involves adding and mixing fine powder of silica glue to lead powder, adding water and acetic acid to the mixture, kneading it into a paste, filling the paste into an electrode plate, and then using the conventional process. It is used to remove the shield plate.

This silica glue remains in the active material even after the rounded positive electrode plate, which is insoluble in water, is transferred. Furthermore, silica glue has a large porosity and has extremely high water adsorption properties.

Therefore, in the electrode plate according to the present invention, since silica glue exists in the active material, moisture during storage is adsorbed by the silica glue and does not easily react with the active material, preventing the formation of a film with low stain air conductivity, which improves storage performance. A good plate is blocked by scales or something.

In addition, in the present invention, the amount of silica glu added is 0.1~],
If it is less than 0.1%, the adsorption capacity of silica glue will be extremely small, so the effect during storage will be weak, and
．． When the temperature exceeds 0, the electrical conductivity decreases and the effect is lost.

Next, examples of the present invention will be described.

EXAMPLE A #4 electrode plate of the present invention was obtained by mixing 1% by weight of fine powder of 1 μm of silica glue into lead powder and using a water pouring method.

For comparison with the electrode plate of the present invention, a conventional electrode plate was obtained using the pbo2 only trap and water injection 8: acid method.

Using the thus obtained electrode plate of the present invention and the conventional electrode plate, N5 was obtained.
A 40Z type ready-to-use lead-in battery was manufactured and the relationship between the period of storage at room temperature and the 5-grain voltage was determined. the result? 'i first
As shown in the figure. In addition, the relationship between the discharge time and the voltage was determined for N54QZ type ready-to-use lead 11 electrodes made of the electrode plates of the present invention and the conventional electrode plates immediately after manufacture and after storage for 12 months. The result is the diagram shown in FIG.

As is clear from FIGS. 1 and 2, the storage battery using the electrode plates of the present invention has a remarkable effect in that the deterioration in battery performance is extremely small even when stored for a long period of time.

[Brief explanation of drawings]

The first problem is the storage period of the inventive plate and the conventional plate.
Fig. 2 is a diagram showing the relationship between the discharge electrode plate and the voltage for the electrode plate of the present invention and the conventional electrode plate. 1. f# side MCII) 2g itlM(&)

Claims (1)

[Claims] An anode plate for a ready-to-use lead-acid battery containing 0.1 to 1.0 weight of silica glue added to the active material.