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Method for preparing new lead-acid battery from active substances of waste and old lead-acid battery

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 improving electrochemical performance and shortening production cycle

Active Publication Date: 2016-01-06
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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  • Method for preparing new lead-acid battery from active substances of waste and old lead-acid battery
  • Method for preparing new lead-acid battery from active substances of waste and old lead-acid battery
  • Method for preparing new lead-acid battery from active substances of waste and old lead-acid battery

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Comparison scheme
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 from active substances of a waste and old lead-acid battery. The method comprises the following steps of dismounting the waste and old lead-acid battery to obtain a positive electrode plate and a negative electrode plate; respectively processing the positive electrode plate and the negative electrode plate to obtain positive electrode powder and negative electrode powder; respectively performing desulfurization and calcination on the obtained positive electrode powder and the negative electrode powder to obtain new positive electrode powder and new negative electrode powder with high electrochemical performance; using the obtained new positive electrode powder and the new negative electrode powder for manufacturing the new lead-acid battery. The prepared new positive electrode powder and the prepared new negative powder can be directly used for manufacturing the new lead acid battery; the method is simple; the implementation is easy. The method has the advantages that the reduction process in the traditional waste and old lead-acid battery positive powder processing process is avoided; the electrochemical performance of the positive electrode powder can be obviously improved; the formation process of the lead acid battery is accelerated; the preparation process conforms to clean production requirements; the battery production period is shortened; the production cost is reduced.

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 Applications(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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