Long-life silicon-based bipolar lead storage battery positive electrode lead paste and preparation method thereof

Abstract

The invention discloses a long-life silicon-based bipolar lead storage battery positive electrode lead paste and a preparation method thereof. The positive electrode lead paste formula comprises the following components: lead powder, short fibers, graphite powder, SnSO4, Ti4O7, Sb2O3, 4PbO.PbSO4, sodium perborate, dilute sulfuric acid and deionized water. The preparation method comprises the steps: S1, uniformly dispersing graphite powder, 4PbO.PbSO4, SnSO4, Ti4O7, Sb2O3, sodium perborate materials and the short fibers into lead powder during preparation of lead paste, and carrying out dry stirring for 5 minutes until the materials are uniformly mixed, so as to prepare a premix 1; S2, quickly adding deionized water into the premix 1, and stirring for 10 minutes until the deionized water and the premix 1 are uniformly mixed, so as to obtain a premix 2; S3, slowly adding dilute sulfuric acid into the premix 2, controlling the adding time to be 10 min and the mixing temperature to be 70 DEG C, continuously stirring for 10 min, cooling to 50 DEG C, measuring the apparent density, and controlling the apparent density to be 4.45+ / -0.1 g / cm<3>. According to the invention, the electric conductivity of the lead paste can be obviously improved, the softening and falling of the lead paste can be effectively delayed, and the cycle life cycle is prolonged.

Description

technical field [0001] The invention belongs to the technical field of lead-acid accumulators, in particular to the anode lead paste of long-life silicon-based bipolar lead accumulators. Background technique [0002] With the increasingly fierce competition in the lead-acid battery industry, and the increasingly high requirements for the battery at the same time, coupled with the impact of iron-lithium batteries on the battery industry, this requires battery manufacturers to continuously improve production processes and technologies, and create new products. Control manufacturing costs. Among them, the lightweight of the grid and its active materials has become a key technology researched by all battery manufacturers around the world, but due to the limitations of the battery itself, it is difficult to advance this work. [0003] At present, maintenance-free valve-regulated batteries in the industry generally use lead-calcium series alloys to make grids, but lead-calcium al...

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Problems solved by technology

Among them, the lightweight of the grid and its active materials has become a key technology researched by all battery manufacturers in the world, but due to the limitations of the battery itself, it is difficult to advance this work

[0003] At present, maintenance-free valve-regulated batteries in the industry generally use lead-calcium series alloys to make grids, but lead-calcium alloys have poor corrosion resistance, so it is necessary to find better alternative materials. Some manufacturers use lead-plated plastic grids. method to replace the lead grid, but due to the defects of the industrial manufacturing process of the plastic grid itself and the restriction of the use strength, it is difficult to promote it in enterprises, and it is difficult to find an alternative material with a suitable cost performance

[0004] At the same time, when lead-acid batteries are recycled, one of the main life attenuation modes is the softening and falling off of the positive electrode paste. On the one hand, the softening and falling off is related to the end-use conditions, and on the other hand, the change of the crystals of the lead paste leads to the deterioration of the lead paste. Soften and fall off in cyclic use

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