Preparation method of pure lead lead-carbon battery and pure lead lead-carbon battery

A lead-carbon battery and lead powder technology, which is applied to battery electrodes, lead-acid batteries, circuits, etc., can solve problems such as shortened cycle life, hinder electrolyte entry, and deteriorate battery cycle performance, so as to improve cycle performance and charge acceptance. The effect of ability improvement

Inactive Publication Date: 2018-03-30
JIANGSU LEOCH BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under such working conditions in traditional lead-acid batteries, coarse, chemically inert lead sulfate crystals are easily formed on the surface of the negative electrode, and a dense layer is formed on the surface of the negative electrode, which hinders the entry of the electrolyte, resulting in the inability of the active material inside the plate to participate in the reaction. Causes battery capacity loss and deteriorates battery cycle performance
[0003] At present, the carbon material used by various companies has a small density and a large specific surface area, which is very different from the lead powder, which is the main raw material for making lead-acid negative electrodes, which has a high density and a small specific surface area. It is difficult to disperse the two evenly by using the existing paste process
If the carbon material is unevenly dispersed, not only will it be impossible to combine the supercapacitor characteristics into the battery, but it will also lead to uneven current distribution during charging and discharging, especially during high-current charging and discharging, increasing battery polarization, and causing battery self-discharge Acceleration, resulting in degradation of battery performance and shortened cycle life

Method used

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  • Preparation method of pure lead lead-carbon battery and pure lead lead-carbon battery
  • Preparation method of pure lead lead-carbon battery and pure lead lead-carbon battery
  • Preparation method of pure lead lead-carbon battery and pure lead lead-carbon battery

Examples

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Effect test

Embodiment 1

[0032] Choose natural flake graphite as conductive graphite, with a specific surface area of ​​1300m 2 / g, mesoporous activated carbon is high specific surface area carbon. Follow the steps below to configure the negative lead paste (number A):

[0033] (1) Weigh 100 parts of lead powder, 1.0 part of barium sulfate, 0.2 part of lignin, 0.06 part of short fiber and 0.4 part of humic acid into the paste mixer, dry mix and stir for 8 minutes.

[0034] (2) Add 0.5 parts of conductive graphite and 0.5 parts of high specific surface area activated carbon to 10 parts of alcohol and water mixed solution (the volume ratio of alcohol to water is 1:4), and stir at 500rpm for 5 minutes to form uniformly dispersed carbon Predispersion.

[0035] (3) In the process of keeping the mixed ingredients composed of lead powder and other auxiliary materials under stirring, slowly add the dispersed carbon pre-dispersion liquid at a speed not exceeding 5mL / min, stir while adding, and then stir for ...

Embodiment 2

[0039] Choose expanded graphite as conductive graphite with a specific surface area of ​​1000m 2 / g, macropore-based activated carbon is high specific surface area carbon. Follow the steps below to configure the negative lead paste (number B):

[0040] (1) Weigh 100 parts of lead powder, 1.5 parts of barium sulfate, 0.4 parts of lignin, 0.05 parts of short fibers and 0.4 parts of humic acid and add them to the paste mixer, dry mix and stir for 8 minutes.

[0041] (2) Add 0.5 parts of conductive agent graphite and 1.0 part of high specific surface area activated carbon to a mixed solution of 10 parts of alcohol and water (the volume ratio of alcohol to water is 1:2), and stir at 400rpm for 5 minutes to form a uniformly dispersed Carbon predispersion.

[0042] (3) In the process of keeping the mixed ingredients composed of lead powder and other auxiliary materials under stirring, slowly add the dispersed carbon pre-dispersion liquid at a speed not exceeding 5mL / min, stir while...

Embodiment 3

[0045] Embodiment 3 (comparative example 1)

[0046] The lead paste produced by the original production process of the workshop is used as a blank control sample (numbered as C), and the specific production steps are as follows:

[0047] (1) Weigh 100 parts of lead powder, 1.5 parts of barium sulfate, 0.4 part of lignin, 0.05 part of short fiber, 0.4 part of humic acid, 0.1 part of ordinary graphite and 0.3 part of acetylene black and add them to the paste mixing machine. Blend for 8 minutes.

[0048] (2) Add 8 parts of pure water to the above mixed ingredients, and stir for 5 minutes at 1000rpm;

[0049] (3) Add 10 parts to the above paste mixing machine with a density of 1.260g / cm 3 sulfuric acid, stirred for 8 minutes, and then added to adjust the water to make a lead paste. Control the apparent density of the lead paste to 4.35±0.05g / cm 3 , The temperature of the lead paste is less than 45°C.

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Abstract

The invention provides a preparation method of a pure lead lead-carbon battery and a pure lead lead-carbon battery. Specifically, the preparation method of a negative lead plaster in preparation of the pure lead lead-carbon battery includes: subjecting lead powder and auxiliary materials to dry blending a obtain a mixed ingredient; dispersing a carbon additive in a mixed solution, and performing stirring to obtain a carbon pre-dispersion solution; mixing the mixed ingredient with the carbon pre-dispersion solution, adding sulfuric acid and performing stirring to obtain the lead-carbon batterynegative lead plaster. The battery made by the method provided by the invention not only accords with the nominal capacity and high-rate discharge performance, but also has charging acceptance abilityimproved by 30% or more compared with ordinary lead-acid storage batteries, and has PSoC cycle performance improved by 50% or more.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a preparation method of a pure lead-lead-carbon battery and the pure lead-lead-carbon battery. Background technique [0002] With the progress of society and the rapid development of economy, resources and energy are increasingly scarce, and the ecological environment is deteriorating. Energy problems and environmental crises have become two major challenges facing human society. Human beings are more dependent on clean and sustainable energy such as solar energy, wind energy, and hydrogen renewable energy. Lead-acid batteries used in energy storage systems and electric vehicle power drive systems are widely used due to their advantages such as good reliability, high cost performance, and recyclability. However, under such working conditions in traditional lead-acid batteries, coarse, chemically inert lead sulfate crystals are easily formed on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/56H01M4/62H01M10/06
CPCH01M4/362H01M4/56H01M4/62H01M4/625H01M10/06Y02E60/10
Inventor 闫大龙黎立华袁芳
Owner JIANGSU LEOCH BATTERY
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