Mixed lead paste capable of improving binding force of positive grid of lead-acid storage battery and lead paste and preparation method of mixed lead paste

Abstract

The invention discloses mixed lead paste capable of improving the binding force of a positive grid of a lead-acid storage battery and lead paste and a preparation method of the mixed lead paste. The method comprises the following steps of adding lead powder which is 80-90% of total mass to a paste mixing machine, adding the following raw materials by percentages: 8-10% of sulfuric acid, 0.1-0.3% of stannous sulfate, 0.08-0.10% of conductive fiber, 0.3-0.5% of colloidal graphite, 0.05-0.15% of sodium borate and 1.0-1.2% of antimonic oxide, carrying out dry mixing for 8-10min, adding deionized water, carrying out wet mixing for 2min, adding residual paste and carrying out wet mixing for 8-10min; and dropwise adding the sulfuric acid which is 8-10% of total mass and stirring for 10-12min to obtain the lead paste of which the apparent density is 4.4+/-0.02g/cm<3>. According to the mixed lead paste, the interface problem between an existing battery grid and an active material of the lead paste can be effectively solved, the bonding force between the positive grid and the lead paste is improved, the strength of a polar plate is improved and the cycle life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a lead paste and a paste for improving the bonding force between the positive grid of a lead-acid storage battery and the lead paste and a preparation method thereof. technical background [0002] Worldwide, lead-acid batteries with stable voltage and low price have ranked first in chemical and physical power sources for many years, both in terms of output and output value. Lead-acid batteries have been widely used in various power and energy storage markets, so a lot of research has been done on power lead-acid batteries and their service life. With the development of science, the life of ordinary batteries has become longer and the maintenance has become simpler. [0003] The early capacity fading of lead-acid batteries using lead-calcium alloy mainly considers the interface between the grid and the lead paste, the bonding force between the lead paste and ...

AI Technical Summary

Problems solved by technology

At present, internalized lead-calcium grid batteries are mainly used in power lead-acid batteries. The main reason is to consider the problem of maintenance-free water loss of lead-acid batteries. Addition amount, high calcium content can effectively solve the interface problem, but the corrosion resistance of the grid will deteriorate; low calcium content can ease the interface problem, but it will lead to enhanced corros...

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