Positive grid lead-calcium alloy for lead-acid storage battery

A technology of lead-acid battery and lead-calcium alloy, which is applied in the direction of electrode carrier/collector, etc., can solve the problems of lead-acid battery early capacity decay, positive electrode grid alloy urgently needed to be improved, and poor deep discharge cycle performance, etc. Cycle performance, improvement of deep discharge performance, effect of refining alloy grains

Inactive Publication Date: 2018-01-16
WUHAN YIWEIDENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead-calcium alloy has excellent maintenance-free performance, high oxygen evolution overpotential, and less water loss. However, due to the poor conductivity of the corrosion film formed by calcium, lead-acid batteries are prone to early capacity decay and poor deep discharge cycle performance, and the grid resistance poor deformability
Lead-acid batteries used in automobile start-stop systems have higher requirements for maintenance-free performance, environmental protection performance and deep cycle life. The existing batteries cannot meet the needs, especially the positive electrode grid alloy of the battery needs to be improved urgently

Method used

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  • Positive grid lead-calcium alloy for lead-acid storage battery
  • Positive grid lead-calcium alloy for lead-acid storage battery

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Effect test

Embodiment 1

[0019] A lead-acid battery positive grid lead-calcium alloy, comprising the following components in weight percentages:

[0020] Calcium 0.08%, tin 0.1%, bismuth 0.0.09%, ytterbium 0.07%, gadolinium 0.02%, and the balance is lead.

[0021] According to the proportioning of the above-mentioned grid alloy, the preparation method is as follows:

[0022] Step 1. Divide the lead into two parts, one part of lead is melted at 450-470°C, and the other part is used; after the lead is melted, a part of tin is added, after it is completely melted, the temperature is raised to 1200-1400°C, calcium is added, After it is completely melted, stir evenly, and when it is lowered to 500-550°C, take it out of the furnace to obtain a lead-tin-calcium alloy;

[0023] Step 2. Melt another part of tin in a high-temperature furnace at 450°C. After it is completely melted, add bismuth. After it is completely melted, stir evenly; raise the temperature to 900-1000°C, add rare earth elements ytterbium an...

Embodiment 2

[0027] A lead-acid battery positive grid lead-calcium alloy, comprising the following components in weight percentages:

[0028] Calcium 0.05%, tin 1.5%, bismuth 0.06%, gadolinium 0.6%, lanthanum 0.03%, and the balance is lead.

[0029] According to the proportioning of the above-mentioned grid alloy, the preparation method is as follows:

[0030] Step 1. Divide the lead into two parts, one part of lead is melted at 450-470°C, and the other part is used; after the lead is melted, a part of tin is added, after it is completely melted, the temperature is raised to 1200-1400°C, calcium is added, After it is completely melted, stir evenly, and when it is lowered to 500-550°C, take it out of the furnace to obtain a lead-tin-calcium alloy;

[0031] Step 2. Melt another part of tin in a high-temperature furnace at 450°C. After it is completely melted, add bismuth. After it is completely melted, stir evenly; raise the temperature to 900-1000°C, add rare earth elements gadolinium and ...

Embodiment 3

[0035] A lead-acid battery positive grid lead-calcium alloy, comprising the following components in weight percentages:

[0036] Calcium 0.07%, tin 1.2%, bismuth 0.08%, ytterbium 0.08%, lanthanum 0.05%, and the balance is lead.

[0037] According to the proportioning of the above-mentioned grid alloy, the preparation method is as follows:

[0038] Step 1. Divide the lead into two parts, one part of lead is melted at 450-470°C, and the other part is used; after the lead is melted, a part of tin is added, after it is completely melted, the temperature is raised to 1200-1400°C, calcium is added, After it is completely melted, stir evenly, and when it is lowered to 500-550°C, take it out of the furnace to obtain a lead-tin-calcium alloy;

[0039] Step 2. Melt another part of tin in a high-temperature furnace at 450°C. After it is completely melted, add bismuth. After it is completely melted, stir evenly; raise the temperature to 900-1000°C, add rare earth elements ytterbium and l...

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Abstract

The invention relates to a novel positive grid lead-calcium alloy for a lead-acid storage battery. The alloy is prepared from components in percentage by weight as follows: 0.05%-0.12% of calcium, 0.5%-1.5% of tin, 0.06%-0.11% of bismuth, 0.07%-0.15% of rare earth elements and the balance of lead, wherein the rare earth elements are one or more of ytterbium, gadolinium and lanthanum. The ingredients of the grid alloy are improved by adding tin, bismuth, the rare earth elements and other additives, and a novel deep-cycle and maintenance-free grid alloy material for the lead-acid storage batterywhich is corrosion-resistant, good in charging property and mechanical property and long in cycle life is obtained.

Description

technical field [0001] The invention relates to the field of lead-acid storage batteries, in particular to a lead-calcium alloy for positive grids of lead-acid storage batteries. Background technique [0002] The lead-acid batteries currently used in the market can be divided into lead-antimony alloys and lead-calcium alloys as the positive grid lead alloys used. Lead-calcium alloy has excellent maintenance-free performance, high oxygen evolution overpotential, and less water loss. However, due to the poor conductivity of the corrosion film formed by calcium, lead-acid batteries are prone to early capacity decay and poor deep discharge cycle performance, and the grid resistance Poor deformability. Lead-acid batteries used in automobile start-stop systems have higher requirements for maintenance-free performance, environmental protection performance and deep cycle life. The existing batteries cannot meet the needs, especially the positive electrode grid alloy of the battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C11/06C22C1/03H01M4/68H01M4/73
CPCY02E60/10
Inventor 余俊
Owner WUHAN YIWEIDENG TECH DEV
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