Rare earth grid alloy for lead-acid storage battery

A lead-acid battery and alloy technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as production restrictions, increased alloy grain size, and intergranular corrosion of alloys

Pending Publication Date: 2020-04-24
HENAN CHAOWEI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of tin content increases the grain size of the alloy, and at the same time, some tin will precipitate at the grain boundary, resulting in intergranular corrosion of the alloy.
There is also the addition of cadm

Method used

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  • Rare earth grid alloy for lead-acid storage battery
  • Rare earth grid alloy for lead-acid storage battery
  • Rare earth grid alloy for lead-acid storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of rare earth grid alloy for lead-acid battery, the element weight ratio of this rare earth grid alloy is: Ca is 0.125%, Al is 0.022%, Sn is 1.16%, Bi is 0.21%, RE is 0.059%, wherein RE is La, and the balance is Pb (refined lead with a purity of more than 99.95%).

[0031] The preparation method of the grid alloy is as follows:

[0032] (1) Prepare Pb-Ca master alloy, tin, aluminum, bismuth, RE and refined lead Pb according to the required ratio;

[0033] (2) Take the prepared refined lead and heat it to 400-550°C to make lead liquid;

[0034] (3) Take half of the lead liquid in step (2), add Pb-Ca master alloy to it, melt and mix at 500-600°C for 15-30min, and mix evenly to form a Pb-Ca alloy melt;

[0035] (4) Take the remaining lead liquid in step (2), add La therein, melt and mix at 600-720° C. for 15-30 minutes, melt and mix evenly to form a Pb-La alloy melt;

[0036] (5) Mix the Pb-Ca alloy melt in step (3) and the Pb-La alloy melt in step (4), then add ...

Embodiment 2

[0038] A kind of rare earth grid alloy for lead-acid battery, the element weight ratio of this rare earth grid alloy is: Ca is 0.119%, Al is 0.029%, Sn is 1.21%, Bi is 0.23%, RE is 0.121%, wherein RE is Nd, and the balance is Pb (refined lead with a purity of more than 99.95%).

[0039] The preparation method of the grid alloy is as follows:

[0040] (1) Prepare Pb-Ca master alloy, tin, aluminum, bismuth, RE and refined lead Pb according to the required ratio;

[0041] (2) Take the prepared refined lead and heat it to 400-550°C to make lead liquid;

[0042] (3) Take half of the lead liquid in step (2), add Pb-Ca master alloy to it, melt and mix at 500-600°C for 15-30min, and mix evenly to form Pb-Ca alloy;

[0043] (4) Take the remaining lead liquid in step (2), add Nd thereinto, melt and mix at 600-720° C. for 15-30 minutes, and melt and mix evenly to form a Pb-Nd alloy;

[0044] (5) Mix the Pb-Ca alloy melt in step (3) and the Pb-Nd alloy melt in step (4), then add Sn, Al...

Embodiment 3

[0046] A kind of rare earth grid alloy for lead-acid battery, the element weight ratio of this rare earth grid alloy is: Ca is 0.121%, Al is 0.026%, Sn is 1.35%, Bi is 0.32%, RE is 0.089%, wherein RE is Sm, the balance is Pb (refined lead with a purity of more than 99.95%).

[0047] The preparation method of the grid alloy is as follows:

[0048] (1) Prepare Pb-Ca master alloy, tin, aluminum, bismuth, RE and refined lead Pb according to the required ratio;

[0049] (2) Take the prepared refined lead and heat it to 400-550°C to make lead liquid;

[0050] (3) Take half of the lead liquid in step (2), add Pb-Ca master alloy to it, melt and mix at 500-600°C for 15-30min, and mix evenly to form Pb-Ca alloy;

[0051] (4) Take the remaining lead liquid in step (2), add Sm thereinto, melt and mix at 600-720° C. for 15-30 minutes, and melt and mix evenly to form a Pb-Sm alloy;

[0052] (5) Mix the Pb-Ca alloy melt in step (3) and the Pb-Sm alloy melt in step (4), then add Sn, Al and...

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Abstract

The invention discloses rare earth grid alloy for a lead-acid storage battery. The rare earth grid alloy comprises the raw materials of, by weight, 0.10% to 0.14% of calcium, 0.8% to 1.5% of tin, 0.02% to 0.05% of aluminum, 0.2% to 0.4% of bismuth, 0.05% to 0.15% of RE and the balance of Pb. When rare earth elements are added into the lead-based alloy for the lead-acid storage battery, the rare earth alloy has the advantages of a Pb-Sb system and a Pb-Ca system. The problems existing in preparation of a grid in the prior art are effectively solved. The performance of the grid is obviously improved, meanwhile, the performance of the battery is improved, and the service life of the battery is prolonged. The problem of poor charging acceptance in winter is solved. The rare earth grid alloy has a good application prospect in the field of lead-acid storage batteries.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a rare earth grid alloy for lead-acid batteries. Background technique [0002] With the continuous development of the new energy industry, the country pays more attention to environmental protection and the rational use of resources. The lead storage industry is pursuing high efficiency and practicality in the development, pursuing high performance of lead-acid batteries, improving battery life, deep cycle and charging acceptance. Capacity, etc., among which the grid alloy plays a very important role in the battery, and improving the performance of the alloy is a very important direction. [0003] The grid is the support of the lead-acid battery. It can support the active material, act as the carrier of the active material, and can also conduct and collect current. Therefore, the industry has great requirements on the corrosion resistance and electrical conductivity o...

Claims

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Application Information

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IPC IPC(8): H01M4/68
CPCH01M4/685Y02E60/10
Inventor 张恒王淼李松林闫新华
Owner HENAN CHAOWEI POWER SUPPLY
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