Manufacturing method of lead-carbon positive grid for lead-acid storage battery

Abstract

The invention discloses a manufacturing method of a lead-carbon positive grid for a lead-acid storage battery. The manufacturing method comprises the following steps: putting a proper amount of saw dust into a muffle furnace to carbonize, taking the carbonized saw dust out, and grinding the saw dust to obtain active carbon; adding the obtained active carbon and a proper quantity of PVDF (Polyvinylidene Fluoride) bonding agent into a ball milling tank to prepare carbon slurry; adding copper blocks, calcium and aluminum blocks into a conventional vacuum induction furnace, and stirring the copper blocks, calcium and aluminum blocks uniformly to obtain copper-calcium-aluminum alloy liquid; stirring the copper-calcium-aluminum alloy liquid in a high-temperature smelting furnace, adding lead, tin and selenium in sequence, and stirring the materials till the materials are mixed uniformly to obtain a lead alloy; and pouring a half of the mixed lead alloy into a mold groove, injecting the obtained carbon slurry at a uniform speed along the middle line of the mold groove, injecting the remaining lead alloy along both sides of the mold groove at the same time, and performing cooling to obtain the lead-carbon positive grid. The obtained grid has the advantages of light mass, high weight specific energy, low production cost, high corrosion resistance and high oxygen evolution over-potential, so that the cycle life of the lead-acid storage battery is long.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a method for preparing lead-carbon positive electrode grids of lead-acid batteries. Background technique [0002] At present, the total output value of lead-acid batteries is half of the total output value of all chemical power sources. Lead-acid batteries are widely used in electric vehicles, hybrid vehicles, communication infrastructure and solar cells due to their high-current discharge performance; It is mature, has the characteristics of large capacity, good safety, low cost, and recyclability. It will still occupy a dominant position in the chemical power supply in the future, and the grid, as the core component of the lead-acid battery, plays a key role in the performance of the lead-acid battery. influences. [0003] In the prior art, lead-calcium grids are commonly used as positive grids in lead-acid batteries. Traditional lead-acid batteries have disadvanta...

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Problems solved by technology

[0003] In the prior art, the positive electrode grid in lead-acid batteries is commonly used as lead-calcium grids. Traditional lead-acid batteries have disadvantages such as low mass specific energy, short cycle life, and low capacity retention.

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