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Additive for high-carbon lead-acid storage-battery polar plate

A lead-acid battery and additive technology, applied in lead-acid battery electrodes, battery electrodes, circuits, etc., can solve the problems of being unsuitable for wide application and high price, and achieve the goal of improving plate strength, increasing utilization rate, and increasing discharge capacity Effect

Inactive Publication Date: 2011-05-25
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The capacitance of the carbon film composed of acetylene black and carbon fiber is insignificant compared with the special activated carbon for supercapacitors, and some of the additive materials in the patent are expensive and not suitable for wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, take 100 kg of lead powder, 80 grams of tin powder, and 800 grams of additives, including precipitated SiO 2 400 g and gas phase SiO 2 400 grams, the additive accounts for 0.8% by weight of the lead powder content in the positive plate formula, stirs for 3-5 minutes to make it evenly mixed, then adds the water of the formula quantity and stirs for 10 minutes, adds the dilute sulfuric acid of the formula quantity in 10~12min, Stir the lead paste continuously while adding the acid, and then stir for 10-15 minutes after adding the acid. During the stirring process, ensure that the temperature of the paste is not higher than 60°C. Measure the apparent density 5 minutes before the paste is released. It must meet the requirements of the process regulations. If it is too high , you can add an appropriate amount of water to adjust, if it is lower than the specified, you can properly extend the stirring time. Coating, acid leaching, surface drying, and then curing at 63°...

Embodiment 2

[0032] The implementation steps are the same as in Example 1, and the positive plate additive is 500 grams, including precipitated SiO 2 250 g and gas phase SiO 2 250 grams, the additive accounts for 0.5% by weight of the lead powder content in the positive plate formula; the negative plate additive is 800 grams, including precipitated SiO 2 300 grams, gas phase SiO 2 300 grams and 200 grams of CMC, the weight percentage of the additive in the lead powder content in the negative plate formula is 0.8%; the formation process adopts internal formation.

[0033] The test results show that the utilization rate of the active material is high, the discharge capacity of the battery is improved, the cycle life is prolonged, and the bonding ability of the grid and the paste is enhanced.

Embodiment 3

[0035] The implementation steps are the same as in Example 1, and the positive plate additive is 1000 grams, including precipitated SiO 2 250 grams, gas phase SiO 2 250 grams, 250 grams of CMC and 250 grams of PTFE, the additive accounts for 1% by weight of the lead powder content in the positive plate formula; the negative plate additive is 2000 grams, including precipitated SiO 2 500 grams, gas phase SiO 2 500 grams, 500 grams of CMC and 500 grams of PTFE, the percentage by weight of the additive in the lead powder content in the negative plate formula is 2%, and the formation process adopts internal formation.

[0036] The test results show that the utilization rate of the active material is high, the discharge capacity of the battery is improved, the cycle life is prolonged, and the bonding ability of the grid and the paste is enhanced.

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Abstract

The invention discloses an additive for a high-carbon lead-acid storage-battery polar plate. The weight percentage of the additive is 0.01-10 percent of the content of lead powder in the formula of the polar plate corresponding to a storage battery, and the additive comprises precipitated SiO2 and / or gas-phase SiO2 or also comprises any one or two in CMC (Carboxyl methyl Cellulose) and PTFE (Polytetrafluoroethylene); because of the existence of the precipitated SiO2 or the gas-phase SiO2, the additive can interact with a sulphuric-acid electrolyte to form a three-dimensional netted structure in a system, and sulphuric acid and water are packaged in the three-dimensional netted structure, so that the electrolyte can be fully contacted with active substances; and meanwhile, the specific surface area of the precipitated SiO2 or the gas-phase SiO2 is higher, the porosity of the polar plate is improved, the surface utilization ratio of the active substances is improved, the capacity of the storage battery is improved, the cycling life of the storage battery is prolonged, and the additive is widely applicable to various high-carbon lead-acid storage-battery polar plates.

Description

technical field [0001] The invention relates to a high-carbon lead-acid storage battery plate additive, which belongs to the technical field of lead-acid storage batteries. Background technique [0002] During the development history of more than 150 years, lead-acid batteries have always occupied an important position in the secondary battery industry because of their cheap price, easy availability of raw materials, and reliable performance. However, due to the limitations of the electrochemical system of the lead-acid battery, the mass density and power density of the battery are low, and the cycle life of the battery is low when used as a power battery, especially as an energy storage battery for a photovoltaic system and a wind power generation system. When the battery is used for hybrid electric vehicles, under the state of high-rate partial charge state, the negative plate is prone to sulfation, which makes the battery invalid, and the service life is very unsatisfacto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/14H01M4/62
CPCY02E60/126Y02E60/10
Inventor 陈红雨王富茜
Owner SOUTH CHINA NORMAL UNIVERSITY
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