Formula of positive active material for lead-acid power battery and preparation method of positive active material

A positive active material, power battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of operator health hazards, accelerated corrosion of coating equipment, high sulfuric acid density, saving time for paste and improving Utilization, energy saving effect

Inactive Publication Date: 2013-03-27
江苏海宝电池科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional active material formula is a mixture of lead powder, sulfuric acid, deionized water and additives, and the paste process must strictly control the temperature (not higher than 65°C), and the sulfuric acid used in the paste has a high density (1.4g / cm 3 ), accelerated the corrosion of the coating equipment, and the acid mist caused environmental pollution and harm to the health of the operator

Method used

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  • Formula of positive active material for lead-acid power battery and preparation method of positive active material
  • Formula of positive active material for lead-acid power battery and preparation method of positive active material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] A positive electrode active material formula is used to prepare a positive electrode plate. The formula is 80% lead powder, 5% lead tetroxide, Na 2 O 2 5%, CMC 2%, deionized water 3%, sulfuric acid (specific gravity 1.05 g / cm 3 ) 5%; when making the paste, first mix and stir the lead powder, lead tetroxide and sodium peroxide powder for 3 minutes, then add CMC and stir for 5 minutes, then add deionized water, stir for 8 minutes, and finally add 1.05 g / cm 3 The positive electrode plate can be coated by stirring the sulfuric acid for 10 minutes; the coated electrode plate can be dried in a 60 ℃ drying room for 4-6 hours before entering the assembly and battery formation process. The rest of the process can completely use the current valve-controlled sealing lead The production process of acid batteries.

[0021] The prepared plates are assembled into a 12V12Ah valve-regulated sealed lead-acid battery for electric bicycles for performance testing. The 6A discharge time is 13...

Embodiment 2

[0023] A positive electrode active material formula is used to prepare the positive electrode plate. The formula is 70% lead powder, 8% lead tetroxide, Na 2 O 2 8%, CMC 3%, deionized water 5%, sulfuric acid (specific gravity 1.05 g / cm 3 ) 6%; when making the paste, first mix and stir the lead powder, lead tetroxide and sodium peroxide powder for 5 minutes, then add CMC and stir for 8 minutes, then add deionized water, stir for 10 minutes, and finally add 1.05 g / cm 3 The positive electrode plate can be coated by stirring the sulfuric acid for 15 minutes; the coated electrode plate can be dried in a 60 ℃ drying room for 4-6 hours to enter the assembly and battery formation process. The rest of the process can completely use the current valve-controlled sealing lead The production process of acid batteries.

Embodiment 3

[0025] A positive electrode active material formula is used to prepare a positive electrode plate. The formula is 75% lead powder, 5% lead tetroxide, Na 2 O 2 5%, CMC 2%, deionized water 5%, sulfuric acid (specific gravity 1.05 g / cm 3 ) 8%; when making the paste, first mix and stir the lead powder, lead tetroxide and sodium peroxide powder for 4 minutes, then add CMC and stir for 6 minutes, then add deionized water, stir for 9 minutes, and finally add 1.05 g / cm 3 The positive electrode plate can be coated by stirring the sulfuric acid for 12 minutes; the coated electrode plate can be dried in a 60 ℃ drying room for 4-6 hours before entering the assembly and battery formation process. The rest of the process can completely use the current valve-controlled sealing lead The production process of acid batteries.

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Abstract

The invention discloses a formula of a positive active material for a lead-acid power battery. The formula is characterized in that sodium peroxide, lead tetraoxide and CMC (Carboxy Methylated Cellulose) are added. The invention also discloses a preparation method of the positive active material. The preparation method comprises the steps of: firstly, mixing and stirring lead powder, lead tetraoxide powder and sodium peroxide powder for 3-5min, then adding the CMC, stirring for 5-8min, adding deionized water, stirring for 8-10min, finally adding sulfuric acid with the specific gravity of 1.05g / cm<3>, stirring for 10-15min, coating a positive plate, and drying the coated positive plate for 4-6h in a drying room with the temperature of 60 DEG C and then performing assembly and battery formation processes.

Description

Technical field [0001] The invention relates to a positive electrode of a lead-acid power battery manufactured by using a novel active material formula, and belongs to the technical field of sealed lead-acid batteries. Background technique [0002] In the traditional lead-acid battery production process, the lead powder used is not pure powdered lead particles, but a two-phase granular powder of metallic lead covered with a layer of lead oxide. The oxidation degree is generally 70-80. %, the remaining 20-30% free lead in the lead powder will be further oxidized in the subsequent paste and curing process until the free lead content drops below 5%, preferably not more than 1%. Free lead can only be converted into active material after it is oxidized to lead oxide. Otherwise, excessive lead will cause the positive plate to be formed during the formation process, due to Pb (density 11.34 g / cm 3 ) PbSO 4 The density is (6.32 g / cm 3 ) PbO 2 (The density is 9.37 g / cm 3 During the conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/57
CPCY02E60/12Y02E60/10
Inventor 沈维新闫智刚
Owner 江苏海宝电池科技有限公司
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