JPS59180971A - Manufacturing method for paste type lead positive electrode plate - Google Patents

Abstract

PURPOSE:To improve the sudden discharge characteristics of a paste type positive electrode at low temperatures by adjusting lead paste while containing a specified range of aluminosilicate soda for a lead powder compound and applying it to the support body of the positive electrode. CONSTITUTION:Aluminosilicate soda is mixed in a lead powder compound at a rate of 0.2-4wt% and is kneaded by adding water and the lead paste is adjusted by continuing kneading while adding dilute acid. In addition, a grid body made of a lead alloy is filled with it and a paste type positive electrode plate is formed by aging and drying. Thus, since aluminosilicate soda is porous and has an excellent property in the adsorption of positive electrode ions, it effectively actuates the move of a dilute ion and a lead ion at the charge and discharge of the negative electrode. As a result, the sudden discharge characteristics of the lead acid storage battery using this positive electrode can sharply be improved at low temperatures.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing paste acid lead electrode plates, particularly positive electrode plates.

Conventional Structures and Problems The main electrode plates of lead-acid batteries that use sulfuric acid as an electrolyte include paste-type electrode plates and clad-type electrode plates. Paste-type electrode plates are easy to manufacture, have relatively good discharge characteristics, and are inexpensive. On the other hand, clad plate plates have a robust structure, but have slightly inferior rapid discharge characteristics and are relatively expensive.

Paste-type positive electrode plates are usually made by adding water, dilute sulfuric acid, etc. to a lead powder compound (a mixture of lead and lead oxide, where the proportion of lead oxide is often about 5° to 80N). The resulting lead paste is coated and filled onto a support such as a lead (including lead alloy) lattice, expanded metal, punched metal, etc., and is then aged and dried.

In this way, the paste type positive electrode plate is easy to manufacture.
Nevertheless, the discharge characteristics, especially the rapid discharge characteristics, were Kana 9 good. In order to improve the rapid discharge characteristics, it is necessary to increase the amount of water or dilute sulfuric acid added to the lead paste to increase the porosity of the electrode plate, or to add various additives to the lead paste.
For example, attempts have been made to increase the porosity by adding diatomaceous materials, silicon dioxide, alumina, calcium silicate, etc., but there is still room for improvement.

OBJECTS OF THE INVENTION The present invention is intended to improve the above-mentioned conventional problems and aims to propose a manufacturing method that has excellent rapid discharge characteristics, particularly low-temperature rapid discharge characteristics, of a paste-acid lead positive electrode plate.

Structure of the Invention The present invention is a method for producing a paste-acid lead positive electrode plate, which comprises applying a lead paste prepared by kneading a lead powder compound, sodium aluminosilicate dilute sulfuric acid, and water as main components to a support. , a lead paste containing sodium luminosilicate in a certain range with respect to the lead powder compound, that is, a proportion of addition to the lead powder compound of 6゛'0゜2 to 4 weight molecules, is applied to the support, and the paste acid is added to the support. This can improve the rapid discharge characteristics of the lead positive electrode plate at low temperatures.

Description of examples Next, embodiments of the present invention will be described.

Sodium aluminosilicate (main component is A-type zeolite: Na2O・2S 102・A2) for 1 part lead powder compound
203.4.6H20) at a ratio of 30y, then kneaded by adding IBOml of water, and continued kneading while adding 80ml of dilute sulfuric acid with a specific gravity of 1.40 to prepare a lead paste. The lead paste obtained as a result of this mixing is
A lead alloy lattice having a width of 1', a height of 120 mm and a thickness of 1.4 mm is filled, and then aged and dried to obtain an unformed positive electrode plate having a dry paste amount of about 50 mm. Between the five positive electrode plates obtained in this way and six known paste-type negative electrode plates that are approximately the same size as the positive electrode plates, a valve-type separator with a glass mat of about 1.1 mm thick is placed between the glass mat and the positive electrode plate. A unit cell is constructed by stacking the cells alternately so as to be in contact with each other, and the sulfuric acid ratio M at the end of chemical formation is set to 1.28.

As a battery for comparison with Battery A of the above Example, Battery B was constructed, except that the sodium aluminosilicate used in the preparation of the lead paste in the Example was not used, and the other points were the same as in the Example. .

First, the above batteries A and B were heated to -150°C for 150°C.
When the current goes to 0, the terminal voltage becomes 1. The discharge duration when discharged to OV was investigated. The results are shown in the table below.

Sodium aluminosilicate can be mixed into lead paste by adding a predetermined amount of sodium aluminosilicate powder to a dry lead powder compound, by adding a predetermined amount of sodium aluminosilicate powder to a dry lead powder compound, by mixing a lead powder compound with water, or by mixing a lead powder compound, water, and dilute sulfuric acid. The method of adding sodium aluminosilicate powder can be carried out at any stage of lead paste preparation. Sodium aluminosilicate can be a compound whose main component is zeolite, representative examples of which include sodalite, A-type zeolite, X-type zeolite, and Y-type zeolite. Even when used, the addition ratio to lead powder is preferably 0.2 to 4 wt. When the addition ratio of sodium aluminosilicate to the lead powder compound is less than 0.2% by weight, almost no effect of adding sodium aluminosilicate is seen, and when it exceeds 4% by weight, it is clear that the properties deteriorate on the contrary. It became.

Effects of the Invention The present invention has been developed by applying a lead paste containing a certain range of sodium aluminosilicate to the support of the positive electrode plate, which is a lead powder compound. The discharge characteristics can be changed.

The reason why such effects of the present invention can be obtained is that, for example, sodium aluminosilicate is porous and has excellent adsorption properties for cations, which prevents sulfate ions and lead ions from being generated during charging and discharging of the negative electrode. It is thought that it is useful for the diffusion of water generated during charging and discharging, since it effectively acts on movement or diffusion.

Claims (1)

[Claims] The lead powder compound and the addition ratio to this lead powder compound are 0.
1. A method for producing a paste acid lead positive electrode plate, comprising applying a lead paste prepared by kneading 2 to 4 weight atomic sodium luminosilicate, dilute sulfuric acid, and water as main components to a support.