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Cyclic lead-acid storage battery positive electrode lead paste formula and preparation method thereof

A lead-acid battery, positive lead paste technology, applied in lead-acid batteries, electrode manufacturing, battery electrodes, etc., to enhance the conductivity and improve the capacity of normal and low temperature

Pending Publication Date: 2022-03-22
ANHUI LEOCH BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on environmental protection considerations, the state has introduced policies to restrict the application of lead-antimony-cadmium alloys, and various manufacturers have turned to lead-calcium alloy systems. Lead-calcium alloys have obvious early capacity decay during the cycle process, and antimony trioxide has been applied to positive electrode paste. In the formula, the early capacity fading caused by the "antimony-free effect" is solved, but it also has a significant inhibitory effect on the formation of tetrabasic lead sulfate during the paste and curing process

Method used

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  • Cyclic lead-acid storage battery positive electrode lead paste formula and preparation method thereof
  • Cyclic lead-acid storage battery positive electrode lead paste formula and preparation method thereof
  • Cyclic lead-acid storage battery positive electrode lead paste formula and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] A positive lead paste formula for a circulating lead-acid battery, the mass percentage of each component relative to lead powder: 8% dilute sulfuric acid, 8% deionized water, 0.05% short fiber, 0.1% colloidal graphite, 0.05% stannous sulfate, pentoxide Diantimony 0.05% and lead powder.

[0025] The density of dilute sulfuric acid at 25°C is 1.400±0.002g / cm 3 , stannous sulfate and antimony pentoxide are analytical grade, antimony pentoxide particle size distribution range: 0.2 ~ 1.8μm, D50 range: 0.45 ~ 0.55μm, lead powder oxidation degree of 72 ~ 78%.

[0026] The material of above-mentioned mass percentage is prepared according to the following steps:

[0027] S1. Dry mixing of materials: add lead powder, short fiber, stannous sulfate and antimony pentoxide with appropriate mass percentages into the mixing chamber for dry mixing, and the dry mixing time is 5.5 minutes;

[0028] S2. Wet mixing of materials: for the mixture in S1, quickly add water within 1 minute, an...

Embodiment 2

[0033] A positive lead paste formula for a circulating lead-acid battery, the mass percentages of each component relative to the lead powder: dilute sulfuric acid 10%, deionized water 12%, short fiber 0.05%, colloidal graphite 0.12%, stannous sulfate 0.12%, pentoxide Diantimony 0.12% and lead powder.

[0034] The density of dilute sulfuric acid at 25°C is 1.400±0.002g / cm 3 , stannous sulfate and antimony pentoxide are analytical grade, antimony pentoxide particle size distribution range: 0.2 ~ 1.8μm, D50 range: 0.45 ~ 0.55μm, lead powder oxidation degree of 72 ~ 78%.

[0035] The material of above-mentioned mass percentage is prepared according to the following steps:

[0036] S1. Dry mixing of materials: add lead powder, short fiber, stannous sulfate and antimony pentoxide with appropriate mass percentages into the mixing chamber for dry mixing, and the dry mixing time is 5.5 minutes;

[0037] S2. Wet mixing of materials: for the mixture in S1, quickly add water within 1 mi...

Embodiment 3

[0042] A positive lead paste formula for a circulating lead-acid battery, the mass percentages of each component relative to the lead powder: dilute sulfuric acid 9%, deionized water 10%, short fiber 0.085%, colloidal graphite 0.25%, stannous sulfate 0.85%, pentoxide Diantimony 0.085% and lead powder.

[0043] The density of dilute sulfuric acid at 25°C is 1.400±0.002g / cm 3 , stannous sulfate and antimony pentoxide are analytical grade, antimony pentoxide particle size distribution range: 0.2 ~ 1.8μm, D50 range: 0.45 ~ 0.55μm, lead powder oxidation degree of 72 ~ 78%.

[0044] The material of above-mentioned mass percentage is prepared according to the following steps:

[0045] S1. Dry mixing of materials: add lead powder, short fiber, stannous sulfate and antimony pentoxide with appropriate mass percentages into the mixing chamber for dry mixing, and the dry mixing time is 5.5 minutes;

[0046] S2. Wet mixing of materials: for the mixture in S1, quickly add water within 1 m...

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Abstract

The invention provides a circulating lead-acid storage battery positive electrode lead paste formula. The circulating lead-acid storage battery positive electrode lead paste formula comprises the following components in percentage by mass relative to lead powder: 8-10% of dilute sulfuric acid, 8-12% of deionized water, 0.05-0.12% of short fibers, 0.1-0.4% of colloidal graphite, 0.05-0.12% of stannous mono-sulphate, 0.05-0.12% of antimony pentoxide and the balance of lead powder. The preparation method has the advantages that 1, antimony pentoxide does not generate an inhibiting effect on the generation of tetrabasic lead sulfate; 2, Sb < 5 + > is connected with three hydrated polymer chains in a positive active material, and Sb < 3 + > is only connected with two hydrated polymer chains, so that the proton conductivity among the active materials is enhanced by antimony pentoxide; under the condition that the quality of the active substance is not changed, the normal and low temperature capacity of the battery is improved to a certain extent. And 3, the reaction between dilute sulfuric acid and lead powder is an exothermic reaction, the temperature in the paste mixing process can be increased by increasing the acid adding speed in the manufacturing process, air cooling is started when the temperature reaches 85 DEG C, and the high temperature maintained for a certain time is beneficial to generation of tetrabasic lead sulfate in the lead paste.

Description

technical field [0001] The invention relates to the technical field of lead-acid batteries, in particular to a formulation of a positive electrode paste of a cycle-type lead-acid battery and a preparation method thereof. Background technique [0002] Lead-acid batteries have a development history of more than 100 years and are widely used in many industries. In order to reduce greenhouse gas emissions, lead-acid batteries have shown explosive growth in the power market. Lead-acid batteries have simple structure, mature production technology, and safe and reliable performance. [0003] Based on environmental protection considerations, the state has introduced policies to restrict the application of lead-antimony-cadmium alloys, and various manufacturers have turned to lead-calcium alloy systems. Lead-calcium alloys have obvious early capacity decay during the cycle process, and antimony trioxide has been applied to positive electrode paste. In the formula, the early capacity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/57H01M4/62H01M4/04H01M10/06
CPCH01M4/57H01M4/04H01M4/628H01M4/624H01M10/06Y02E60/10
Inventor 程先清陈清元朱继昌李振华李志兵崔辉
Owner ANHUI LEOCH BATTERY TECH
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