Lead-acid storage battery and preparation method thereof

Abstract

The invention discloses a lead-acid storage battery and a preparation method thereof. The lead-acid storage battery comprises a positive plate and a negative plate. Coating of the negative plate of the lead-acid storage battery comprises, by weight, 1000 parts of lead powder, 1-20 parts of polyaspartic acid or poly-aspartate, 2-50 parts of silicon dioxide, 2-10 parts of barium sulfate, 4-20 parts of expanding agents, 80 parts of acid, 10 parts of mixed carbon and 106 parts of de-ionized water. By means of the lead-acid storage battery and the preparation method thereof, the battery failure due to the fact that the negative pole is sulfated is effectively delayed, negative pole hydrogen evolution caused by addition of a large amount of carbon is controlled, and the purposes that capacity of the lead-acid storage battery is improved, and the cycle life is prolonged are achieved. Moreover, carbon content of the negative pole of the storage battery is improved to a certain extent.

Description

technical field [0001] The invention relates to a battery, in particular to a lead-acid battery and a preparation method thereof. Background technique [0002] The polar plates of lead-acid batteries are divided into positive and negative. In order to improve the performance of the positive and negative plates of lead-acid batteries, it is necessary to add positive and negative additives separately when manufacturing the positive and negative plates. Generally speaking, the additives for the positive plates are relatively simple, while The additives of the negative plate are more complex, including expansion agents, corrosion inhibitors and hydrogen evolution inhibitors. For example, commonly used expansion agents can be divided into inorganic expansion agents and organic expansion agents. Inorganic expansion agents include barium sulfate, carbon black, strontium sulfate, etc., which are conducive to the diffusion of electrolyte in the battery and the deep discharge of the b...

AI Technical Summary

Problems solved by technology

[0006] The Chinese patent "Lead-Acid Battery Electrolyte and Preparation Method" with application number 201310668012.7 discloses a lead-acid battery electrolyte and a preparation method. ~2g, 1~2g sodium tetraborate, 0.1~0.5g stannous sulfate, 32~36g sulfuric acid and 58~65g pure water. The refinement of lead sulfate particles generated during the process, but because it is added to the electrolyte, sodium polyaspartate does not participate in the reaction process during the paste process, and the sulfuric acid generated during the paste process cannot be refined Lead particles, so it does not play a role in the conversion of lead sulfate into active substances during the chemical formation process

In addition, there is another disadvantage when adding it to the electrolyte, because sodium polyaspartate prevents or delays the formation of lead sulfate, which is not conducive to the discharge process, that is, the discharge capacity is low