Method for preparing positive pole plate for lead-acid storage battery

Abstract

The invention discloses a method for preparing a positive pole plate for a lead-acid storage battery. The method comprises the following steps of: mixing carbon fibers, graphite fibers, carbon nanotubes, carboxymethyl cellulose and polytetrafluoroethylene so as to prepare carbon fiber mixed plaster slurry; carrying out dry mixing on lead powder, acetylene black, polyvinyl alcohol, lead sulfate, aluminum sulfate and polyester fiber, adding deionized water, adding dilute sulfuric acid liquid in a spraying manner while stirring, and carrying out plaster mixing, thereby obtaining positive-pole lead plaster for the lead-acid storage battery; coating the carbon fiber mixture on a plate-grid-shaped current collector made from lead-antimony alloy, drying and curing, thereby forming a carbon fiber composite base layer on the current collector; and uniformly coating the positive-pole lead plaster on the carbon fiber composite base layer, curing and drying, thereby forming the positive pole plate. According to the positive pole plate for the lead-acid storage battery, prepared by the method, the structural strength and dimensional stability of a pole plate grid are enhanced, and the active substance utilization ratio, discharge depth and cyclical stability are improved; and when the positive pole plate is applied to the lead-acid storage battery, the lead-acid storage battery has the advantages of high specific capacity and longer cyclic service life.

Description

technical field [0001] The invention relates to a method for preparing a battery positive plate, in particular to a lead-acid storage battery positive plate and a preparation method thereof. Background technique [0002] After entering the 21st century, human beings are faced with two major challenges of the environment and resources. Natural resources are becoming increasingly depleted, and carbon oxide emissions are increasing day by day. In particular, the exhaust emissions of transportation have caused an inestimable impact on the greenhouse effect. Human beings are confronted with two urgent problems of environmental protection and rational utilization of resources. Moving closer to the era of electric vehicles and developing "green transportation", electric vehicles with zero exhaust emissions, no pollution, and no noise have broad prospects for development. [0003] The core of an electric vehicle is a power source for power. However, lead-acid batteries are used as ...

AI Technical Summary

Problems solved by technology

[0003] The core of an electric vehicle is a power source for power. However, lead-acid batteries are used as power sources for electric vehicles. Compared with battery systems such as nickel-metal hydride batteries and lithium batteries, they have low volume specific energy; low weight specific energy; use Disadvantages such as short life

[0004] According to the anatomy of the failed lead-acid batteries for electric vehicles, the reason for the failure of a considerable part of the batteries is that the positive active material of the battery softens, the positive lead powder falls off into the electrolyte, and the battery forms an internal short circuit, which causes the battery to lose capacity, resulting in battery failure

Existing manufacturers only use high temperature (temperature higher than 80°C) curing method to increase the content of tetrabasic lead sulfate in the lead paste, but the tetrabasic lead sulfate particles formed in this way are very large, with a size of 50-100 μm. When the plate is charged and formed, it is difficult to convert into an active material (PbO 2 ), and the consistency is poor