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Graphene-containing lead alloy for lead storage battery grids, and preparation method thereof

A lead-acid battery and graphene technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems that lead alloy factories cannot achieve, the reduction reaction time is long, and it is difficult to popularize production, so as to enhance the performance of charge and discharge and cycle life, the effect of solving the decline in electrical conductivity and not easy to deform

Active Publication Date: 2015-10-21
SINO INNOV SEMICON (PKU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods have the following problems: 1. A large number of professional smelting and compounding reaction equipment and raw materials are involved, and the requirements for equipment sealing, pressure bearing capacity, and workshop environment are very strict, which cannot be achieved by general lead alloy factories.
2. The reduction reaction time is very long, often takes dozens of hours or even longer, requires high temperature and high pressure, and an oxygen-free environment. The technical difficulty is relatively large, and it is difficult to popularize production

Method used

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  • Graphene-containing lead alloy for lead storage battery grids, and preparation method thereof

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Embodiment 1

[0014] Example 1, a graphene-containing lead alloy for lead battery grids, comprising 0.015% graphene, 1.0% tin, 0.02% aluminum, 0.05% sponge calcium and 98.915% lead by weight . The preparation method comprises the following steps: (1) putting 2 / 3 of the amount of electrolytic lead into a lead melting pot, heating to 680°C until the electrolytic lead is completely melted; (2) then turning on the centrifugal mixer, and A certain amount of graphene is slowly and continuously added or added intermittently in batches into the lead liquid under the condition of stirring at a medium speed; (3) after 20 minutes, add the stated amount of pure tin bars and pure aluminum bars successively, and the centrifugal mixer continues Stir and mix for more than half an hour; (4) close the centrifugal mixer, add the amount of calcium sponge encapsulated with lead skin, press the calcium sponge encapsulated with lead skin into the bottom of the lead liquid with a bell jar with a leak at the bottom...

Embodiment 2

[0015] Example 2, a lead alloy containing graphene for lead storage battery grids, which contains 0.03% graphene, 1.2% tin, 0.04% aluminum, 0.08% sponge calcium and 98.65% lead. The preparation method comprises the following steps: (1) putting 2 / 3 of the amount of electrolytic lead into a lead melting pot, heating to 680°C until the electrolytic lead is completely melted; (2) then turning on the centrifugal mixer, and A certain amount of graphene is slowly and continuously added or added intermittently in batches into the lead liquid under the condition of stirring at a medium speed; (3) after 20 minutes, add the stated amount of pure tin bars and pure aluminum bars successively, and the centrifugal mixer continues Stir and mix for more than half an hour; (4) close the centrifugal mixer, add the amount of calcium sponge encapsulated with lead skin, press the calcium sponge encapsulated with lead skin into the bottom of the lead liquid with a bell jar with a leak at the bottom,...

Embodiment 3

[0016] Embodiment 3, a kind of lead-acid battery grid lead alloy containing graphene, calculated by weight percentage, it comprises 0.06% graphene, 1.2% tin, 0.04% aluminum, 0.1% sponge calcium and 98.6% lead. The preparation method comprises the following steps: (1) putting 2 / 3 of the amount of electrolytic lead into a lead melting pot, heating to 680°C until the electrolytic lead is completely melted; (2) then turning on the centrifugal mixer, and A certain amount of graphene is slowly and continuously added or added intermittently in batches into the lead liquid under the condition of stirring at a medium speed; (3) after 20 minutes, add the stated amount of pure tin bars and pure aluminum bars successively, and the centrifugal mixer continues Stir and mix for more than half an hour; (4) close the centrifugal mixer, add the amount of calcium sponge encapsulated with lead skin, press the calcium sponge encapsulated with lead skin into the bottom of the lead liquid with a bel...

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Abstract

The invention discloses a graphene-containing lead alloy for lead storage battery grids. The graphene-containing lead alloy includes 0.015-0.15% of graphene, 1.0-1.5% of tin, 0.02-0.04% of aluminum, 0.05-0.1% of calcium and 98.21-98.915% of lead. A preparation method of the graphene-containing lead alloy comprises the following steps: putting 2 / 3 of lead in a lead melting pot, and heating to 680DEG C in order to melt lead; adding graphene to molten lead; adding pure tin strips and pure aluminum strips 20min later, and stirring and mixing for above 0.5h; adding lead sheath packaged calcium, pressing calcium into the bottom of the molten lead by using a bell jar with the bottom provided with leakage holes, slowly stirring and mixing for above 0.5h when the molten lead does not bubble, adding the residual lead into the lead melting pot, continuously stirring after the lead is completely molten, and carrying out ingot casting 1h later. The preparation method has the advantages of simplicity, reliability, simple structure of a used device, and low cost; and the grids made by using the lead alloy prepared through the method have strong creep and corrosion resistance, and can meet deep cycle and heavy current charge and discharge requirements.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and relates to a lead alloy for grids of lead-acid batteries containing graphene and a preparation method thereof. Background technique [0002] In recent years, with the deterioration of the environment, green energy is attracting more and more attention from the society, and electric vehicles and micro-hybrid vehicles are just one of the effective ways to solve this problem. Low-cost, mature and reliable lead-acid battery, as a traditional power source, is in urgent need of technical improvement to meet the development needs of electric vehicles. The performance of the lead-acid battery mainly depends on the plate, and the grid is an important part of the plate, which determines the service life, water loss, and high-current discharge capacity of the battery. The battery made of lead-antimony-cadmium positive electrode grid alloy has the characteristics of deep cycle charge and dis...

Claims

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Application Information

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IPC IPC(8): H01M4/68H01M4/84
CPCH01M4/685H01M4/84Y02E60/10
Inventor 陈恒张戌有陈彥行崔艳良蔺更武马辉
Owner SINO INNOV SEMICON (PKU) CO LTD
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