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Preparation process for cathode of lead-charcoal superbattery

A super battery and preparation technology, applied in the direction of lead-acid battery electrodes, etc., can solve the problems of shortened cycle life, accelerated battery self-discharge, uneven current distribution, etc., and achieve the effect of high-current cycle life improvement and self-discharge reduction

Inactive Publication Date: 2013-01-09
ZHEJIANG NARADA POWER SOURCE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the carbon material used 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 process for cathode of lead-charcoal superbattery

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Embodiment 1

[0023] 1. Add 2 parts of activated carbon, add 15 parts of water, and stir with a high-speed mixer at 3000 rpm for 10 minutes;

[0024] 2. Put the dispersed activated carbon suspension into the paste machine, and then add other negative electrode additives, other negative electrode additives are 1.4 parts of barium sulfate, 0.5 parts of sodium lignosulfonate, 0.5 parts of humic acid, 0.1 part of short fiber, and stir for 5 minute;

[0025] 3. Add 100 parts of lead powder and stir for 5 minutes;

[0026] 4. Add 6 parts with a density of 1.40g / cm 3 Sulfuric acid, stirred for 10 minutes to make a lead paste, add water appropriately during the stirring process, control the apparent density of the lead paste to 4.0±0.1, and the temperature of the lead paste is less than 45°C.

Embodiment 2

[0028] 1. In the paste machine, add other negative electrode additives other than carbon material powder: 1.4 parts of barium sulfate, 0.5 parts of sodium lignosulfonate, 0.5 parts of humic acid, 0.1 part of short fiber, and add 100 parts of lead powder, and stir for 5 minutes ;

[0029] 2. Add 2 parts of activated carbon, add 15 parts of water, and stir with a high-speed mixer at 3000 rpm for 10 minutes;

[0030] 3. Add the dispersed activated carbon suspension into the paste mixer and stir for 5 minutes.

[0031] 4. Add 6 parts with a density of 1.40g / cm 3 Sulfuric acid, stirred for 10 minutes to make a lead paste, add water appropriately during the stirring process, control the apparent density of the lead paste to 4.0±0.1, and the temperature of the lead paste is less than 45°C.

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Abstract

The invention provides a preparation process for a cathode of a lead-charcoal superbattery. Carbon materials are evenly distributed in a plumbic acid cathode so that organic combination of super electrical characteristics and battery performance is achieved. By means of the preparation process for the cathode of the lead-charcoal superbattery, charcoal material powder is independently and evenly dispersed in water through high-speed stirring and then mixed with lead powder and other cathode additives to be evenly dispersed. The charcoal material comprises activated carbon. Capacity preserving rate of the battery manufactured through the previous manufacture process cannot reach the standard requirement (the capacity preserving rate of the battery is no lower than 96% in the standard requirement), the battery manufactured by firstly pre-dispersing carbon in water and then performing paste mixing is obviously reduced in self discharge, and the capacity preserving rate of the battery exceeds the standard requirement. Further, the current is large, and cycle life is obviously improved.

Description

technical field [0001] The invention relates to a preparation process for a negative electrode of a lead-carbon super battery, belonging to the field of chemical power sources. Lead-acid batteries that can be used in hybrid electric vehicles, electric tools, new energy storage and other fields. Background technique [0002] In recent years, with the aggravation of environmental pollution and energy crisis, the new energy industry has been paid more and more attention by people. In particular, electric vehicles (replacing pure electric and hybrid vehicles), as well as new energy generation systems such as wind power and solar energy, have become current hot research areas, and battery technology has become one of the key research objects. In recent years, people have added carbon materials with high specific surface area (including activated carbon, acetylene black, carbon black, graphite, etc.) to the negative electrode of lead-acid batteries, and integrated the performance...

Claims

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Application Information

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IPC IPC(8): H01M4/16
CPCY02E60/126Y02E60/10
Inventor 丁平陈建吴贤章相佳媛孔德帅
Owner ZHEJIANG NARADA POWER SOURCE CO LTD
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