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Preparation method of tetrabasic lead sulfate

A tetrabasic lead sulfate and sulfuric acid technology, applied in lead sulfate, lead-acid batteries, electrical components, etc., can solve the problems of low initial capacity, poor consistency, and difficulty in plate formation, so as to improve cycle life and overcome formation difficulties. , the effect of increasing battery cycle life

Active Publication Date: 2013-11-06
ANHUI YONGHENG STORAGE BATTERY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a preparation method of tetrabasic lead sulfate, improve the crystal structure of lead paste, make the formed 4BS fine and uniform, overcome the difficulties of plate formation, poor consistency, and low initial capacity, and shorten the Curing time, improving battery cycle life and other comprehensive properties to achieve real energy saving, low carbon, and environmental protection

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  • Preparation method of tetrabasic lead sulfate
  • Preparation method of tetrabasic lead sulfate

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Embodiment 1

[0025] A kind of preparation method embodiment 1 of tetrabasic lead sulfate of the present invention, comprises the following steps successively:

[0026] A. Weigh the sample: Weigh the lead powder and sulfuric acid, the oxidation degree of the lead powder is 75%, the lead powder includes Pb and PbO, and the amount of PbO is the same as that of H 2 SO 4 The ratio of the amount of the substance is 4:1, add appropriate amount of distilled water to make H 2 SO 4 The density is 1.07g cm -3 .

[0027]B. Hydrothermal reaction: Pour the weighed samples into the reaction kettle respectively, add distilled water to carry out hydrothermal reaction, the hydrothermal reaction temperature is 110°C, the reaction time is 3h, and cool down;

[0028] C. Ball milling treatment: put the product obtained in step B into a ball mill tank for ball milling reaction, and the ball milling reaction time is 2h;

[0029] D. Vacuum drying: put the product obtained in step C into a vacuum drying ov...

Embodiment 2

[0030] A kind of preparation method embodiment 2 of tetrabasic lead sulfate of the present invention, comprises the following steps successively:

[0031] A. Weighing samples: Weigh lead powder and sulfuric acid. The oxidation degree of lead powder is 80%. 2 SO 4 The ratio of the amount of the substance is 5:1, add appropriate amount of distilled water to make H 2 SO 4 The density is 1.10g·cm -3 .

[0032] B. Hydrothermal reaction: Pour the weighed samples into the reaction kettle respectively, add distilled water to carry out hydrothermal reaction, the hydrothermal reaction temperature is 130°C, the reaction time is 4h, and cool down;

[0033] C. Ball milling treatment: put the product obtained in step B into a ball mill tank for ball milling reaction, the ball milling reaction time is 5h;

[0034] D. Vacuum drying: put the product obtained in step C into a vacuum drying oven for vacuum drying at a drying temperature of 80° C. to obtain a tetrabasic lead sulfate prod...

Embodiment 3

[0035] A kind of preparation method embodiment 3 of tetrabasic lead sulfate of the present invention, comprises the following steps successively:

[0036] A. Weigh the sample: Weigh the lead powder and sulfuric acid, the oxidation degree of the lead powder is 85%, the lead powder includes Pb and PbO, and the amount of PbO is the same as that of H 2 SO 4 The ratio of the amount of the substance is 5:1, add appropriate amount of distilled water to make H 2 SO 4 The density is 1.15g cm -3 .

[0037] B. Hydrothermal reaction: Pour the weighed samples into the reaction kettle respectively, add distilled water to carry out hydrothermal reaction, the hydrothermal reaction temperature is 150°C, the reaction time is 6h, and cool down;

[0038] C. Ball milling treatment: put the product obtained in step B into a ball mill tank for ball milling reaction, the ball milling reaction time is 4h;

[0039] D. Vacuum drying: put the product obtained in step C into a vacuum drying oven ...

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Abstract

The invention discloses a preparation method of tetrabasic lead sulfate. The preparation method comprises following steps: A, samples are weighed; B, hydro-thermal reaction; C, ball milling processing; and D, vacuum drying. The preparation method may also comprise steps such as E, post-processing. Hydro-thermal reaction and ball milling processing are combined to prepare 4BS according to the invention. The 4BS prepared by the preparation method possesses characteristics that: the 4BS content can reach 95% or more; and average particle size can reach 10um or less. The preparation method is capable of solving problems that: pole plate formation is difficult, consistency is poor and initial capacity is less; shortening curing time; improving combination properties such as storage battery cycle life; and realizing true energy-saving, low carbon and environmental protection.

Description

technical field [0001] The invention relates to a preparation method of an additive for a lead-acid storage battery, in particular to a preparation method of tetrabasic lead sulfate. Background technique [0002] The curing of the positive electrode of lead-acid batteries is a key process in battery manufacturing. During the curing process, the chemical and physical structural basis of the active material is established, and the plate obtains mechanical strength, so that the subsequent process operations can be carried out. According to the AOS theory: as the battery cycle progresses, the positive electrode active material repeatedly expands and contracts, and the neck area between the particles becomes smaller, making the contact between the active material particles more and more poor, and the electrical conductivity deteriorates, eventually leading to The active material softens and falls off, the battery capacity is obviously attenuated, and the battery fails. Therefor...

Claims

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Application Information

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IPC IPC(8): H01M4/62C01G21/20H01M10/06
CPCY02E60/126Y02E60/10
Inventor 张靖佳
Owner ANHUI YONGHENG STORAGE BATTERY
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