Intermittent sectional quick solidification method for cadmium-free internal formation storage battery

Abstract

The invention belongs to an intermittent sectional quick solidification method for a cadmium-free internal formation storage battery. An intermittent sectional high-temperature and high-humidity solidification method, a short-time high-temperature high-humidity seven-stage solidification method and a process clearance pause method are combined, and formation of a great amount of tetrabasic lead sulfate (4PbO.PbSO4.H2O) is avoided, so a mixture of tribasic lead sulfate and tetrabasic lead sulfate is easily formed in a pole plate, the tribasic lead sulfate is a major part in the pole plate, the cycle life of the storage battery can be prolonged, and the primary discharge capacity can be improved. The sectional high-temperature and high-humidity solidification method is employed, and the intermittent sectional quick solidification method is effective, practical and convenient and has the advantages that solidification time is greatly shortened, energy is saved, consumption is reduced, the quality of products is improved, and the cycle life of the storage battery is long.

Description

[0001] technical field [0002] The invention belongs to a cadmium-free internalization forming accumulator intermittent segmented rapid curing method. Background technique [0003] There is a step in the manufacturing process of cadmium-free internalized battery plates. Curing is to put the paste-coated wet plates in a special curing room, and use them within a specified time under certain temperature and humidity conditions. The residual free lead in the lead paste is further oxidized into lead oxide and basic lead sulfate. At the same time, the surface of the plate grid is corroded, and lead oxide is formed on the surface of the grid to combine with the lead oxide in the lead paste, thereby improving the grid. Binding power with active substances. The quality of the curing process directly affects the performance of the battery, especially the cycle life of the battery. [0004] In this step, if the curing temperature is too low, the constant speed stage will be prol...

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Problems solved by technology

[0004] In this step, if the curing temperature is too low, the constant speed stage will be prolonged, but due to the reduced diffusion rate of oxygen and moisture, the oxidation rate of metal lead in the plate and the corrosion rate of the grid will also be slowed down, resulting in If the drying and curing time is too long, it is easy to produce tribasic lead sulfate (3PbO·PbSO 4 ·H 2 O), directly affects the quality and production efficiency of the product; but if the curing temperature is too high, it will not only cause the water to evaporate too fast, but also destroy the constant speed drying. Although the curing time can be shortened, the plate is prone to cracks, metal lead oxidation and plate Gate corrosion ends prematurely, resulting in active material loosening

At the same time, when the curing temperature is too high, the metal lead will be oxidized, and the temperature of the plate is too high due to the large amount of oxidation heat, resulting in tetrabasic lead sulfate (4PbO·PbSO 4 ·H 2 O) generation, too much tetrabasic lead sulfate will affect the quality of the product