A method for preparing new lead-acid batteries using active materials of waste lead-acid batteries

A lead-acid battery, active material technology, applied in lead-acid battery, lead-acid battery construction, secondary battery manufacturing and other directions, can solve problems such as simplifying waste lead-acid battery recycling process, and improve production efficiency , the effect of reducing the risk of contamination and simplifying the treatment

Active Publication Date: 2017-07-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, at present, there is no more simplified recycling process of waste lead-acid batteries and a method to further reduce the cost of recycling waste lead-acid batteries. This application discloses this technology

Method used

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  • A method for preparing new lead-acid batteries using active materials of waste lead-acid batteries
  • A method for preparing new lead-acid batteries using active materials of waste lead-acid batteries
  • A method for preparing new lead-acid batteries using active materials of waste lead-acid batteries

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Effect test

Embodiment 1

[0046] A kind of method utilizing the active material of waste lead-acid battery of the present invention to prepare new lead-acid battery comprises the steps:

[0047] (1) The waste lead-acid battery is cut from the upper part, and the positive electrode sheet and the negative electrode sheet, the electrolyte sulfuric acid, and the plastic casing are obtained by separation; the positive electrode sheet and the negative electrode sheet are respectively processed by water flow washing, ultrasonic wave or mechanical impact to obtain the positive electrode active material powder ( Hereinafter referred to as "positive electrode powder"), negative electrode active material powder (hereinafter referred to as "negative electrode powder"), positive electrode grid alloy, negative electrode grid alloy and waste separator;

[0048] (2) Put the positive electrode powder into a stirred reactor, and analyze the PbSO in the positive electrode powder obtained 4 content, according to PbSO 4 A...

Embodiment 2

[0056] The chemical treatment process of positive electrode powder and negative electrode powder is as follows:

[0057] Positive electrode powder treatment: put the positive electrode powder into a stirred reactor, analyze and determine the PbSO in the positive electrode powder 4 The content of sodium carbonate added and PbSO in positive electrode powder 4 The molar ratio is 0.5:1 to partially desulfurize the positive electrode powder. Stir to react, the reaction temperature is 30°C, and the reaction time is 1h; the solid is obtained by filtration, and then washed to remove sodium sulfate; the obtained solid is calcined in an air atmosphere at 500°C for 1h to obtain a new positive electrode powder;

[0058] Negative electrode powder treatment: put the negative electrode powder into a stirred reactor, analyze and determine the PbSO in the negative electrode powder 4 content, according to PbSO 4 The content of excess 5% NaOH aqueous solution is added to completely desulfuriz...

Embodiment 3

[0061] The chemical treatment process of positive electrode powder and negative electrode powder is as follows:

[0062] Positive electrode powder treatment: put the positive electrode powder into a stirred reactor, analyze and determine the PbSO in the positive electrode powder 4 content, according to PbSO 4 Add an excess of 5% KOH aqueous solution to completely desulfurize the positive electrode powder, and stir to make it react. The reaction temperature is 40°C, and the reaction time is 0.5h; the solid is obtained by filtration, and then washed to remove potassium sulfate; the obtained solid is calcined in an air atmosphere at 600°C for 0.5h to obtain a new positive electrode powder;

[0063] Negative electrode powder treatment: put the negative electrode powder into a stirred reactor, analyze and determine the PbSO in the negative electrode powder 4 content, the added potassium carbonate and PbSO in the negative electrode powder 4 The molar ratio is 0.9:1, so that the n...

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Abstract

The invention discloses a method for preparing a new lead-acid battery by using the active material of the waste lead-acid battery. powder and negative electrode powder; desulfurize and calcinate the obtained positive electrode powder and negative electrode powder respectively to obtain new positive electrode powder and new negative electrode powder with high electrochemical performance; use the obtained new positive electrode powder and new negative electrode powder for new lead-acid batteries manufacturing. The new positive electrode powder and new negative electrode powder prepared by the invention can be directly used in the manufacture of new lead-acid batteries, and the method is simple and easy; the invention avoids the reduction process in the traditional waste lead-acid battery positive electrode powder treatment process, and can significantly improve the efficiency of the positive electrode. The electrochemical performance of the powder accelerates the formation process of lead-acid batteries, the preparation process meets the requirements of clean production, and shortens the battery production cycle and reduces production costs.

Description

technical field [0001] The invention relates to a method for recycling waste lead-acid batteries, in particular to a method for preparing new lead-acid batteries by using active materials of waste lead-acid batteries, and belongs to the technical field of lead-acid battery recycling and production. Background technique [0002] Lead-acid battery is a kind of cheap and high-quality secondary battery, so it is widely welcomed by all walks of life. Like all industrial products, the performance will deteriorate after a long time, and it will no longer meet the needs of users, which forms waste lead-acid batteries. [0003] Existing studies have determined that the positive electrode active material of waste lead-acid batteries mainly contains low-activity PbSO with coarse crystals. 4 and PbO 2 , the negative electrode active material contains low-activity PbSO with coarse crystals 4 and metal Pb. One of the reasons for the deterioration of the performance of waste lead-acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M10/04H01M10/12
CPCH01M10/04H01M10/12H01M10/54Y02E60/10Y02W30/84Y02P70/50
Inventor 雷立旭刘巍张科马蓓蓓
Owner SOUTHEAST UNIV
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