Preparation method for lead paste of negative plate of lead-acid battery and negative plate

A lead-acid battery, negative plate technology, applied in lead-acid battery electrodes, battery electrodes, circuits, etc., can solve the problems of difficulty in ensuring the uniformity of dispersion, increase the difficulty and process of auxiliary materials, etc., and is suitable for large-scale production. Application, battery performance improvement, the effect of increasing the contact area

Inactive Publication Date: 2013-02-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to first nanometerize or modify the excipients, which increases the difficulty and process of industrial production of excipients.
At the same time, in a short period of 8 minutes, it is difficult to spray the auxiliary material emulsion on the dry-stirred lead powder to ensure the uniformity of dispersion. This method is essentially to use the traditional mechanical stirring method for lead powder, carbon powder and other additives for mixing

Method used

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  • Preparation method for lead paste of negative plate of lead-acid battery and negative plate

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Experimental program
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Effect test

Embodiment 1

[0040]Turn on the mechanical stirring, prepare a total of 50Kg of a water-ethanol volume ratio of 9:1 mixed solution in the stirring tank, then add 37.5g of carbon black, 37.5g of graphite, 120g of barium sulfate, 18g of sodium lignosulfonate, humic acid 24g, 4g of 60% PTFE emulsion, 15Kg of lead powder, stirring for 10min. Under the condition of continuous stirring, the high-speed centrifugal spray dryer is used for spray drying, the rotation speed is 10000r / min, the air inlet temperature is controlled at 200°C, the peristaltic pump automatically feeds the material, the two-stage cyclone separator collects the powder, and the bag filter is turned on. , to prevent lead dust pollution.

[0041] After the spraying is completed, collect all the powder (the color of the powder is gray), weigh 12Kg and add it to the paste mixing machine.

[0042] Disperse 8g of polyester fiber in 1400g of deionized water, and then pour it into the paste mixer. After stirring for 10 minutes, add 1...

Embodiment 2

[0045] Turn on the mechanical stirring, prepare a total of 55Kg of a mixed solution with a water-ethanol volume ratio of 9:1 in the stirring tank, and then add 37.5g of carbon black, 37.5g of graphite, 750g of graphene (5% solid content), 120g of barium sulfate, Sodium lignosulfonate 30g, lead powder 15Kg, stir for 10min. Under the condition of continuous stirring, a high-speed centrifugal spray dryer is used for spray drying, the rotation speed is 10000r / min, and the temperature of the air inlet is controlled at 200°C. After the spraying is completed, weigh 12Kg of the collected powder and add it to the paste mixing machine, and follow the corresponding steps in Example 1 for subsequent operations to prepare the negative electrode plate of the battery.

Embodiment 3

[0047] Turn on the mechanical stirring, prepare a water-ethanol volume ratio of 14:1 mixed solution in the stirring tank, a total of 55Kg, then add 150g of carbon black, 75g of graphite, 120g of barium sulfate, 30g of sodium lignosulfonate, 7.5g of 60% PTFE emulsion g, 15Kg of lead powder, stirred for 10min. Under the condition of continuous stirring, a high-speed centrifugal spray dryer is used for spray drying, the rotation speed is 12000r / min, and the temperature of the air inlet is controlled at 200°C. Weigh the collected powder at 12Kg and add it to the paste mixing machine,

[0048] Disperse 10g of acrylic fiber in 1400g of deionized water, and add the mixed solution into the above-mentioned paste mixing machine; after stirring for 10min, add the 15℃ =1.38±0.004g / cm 3 dilute sulfuric acid, continue to stir and mix for 5 minutes, and finally add 100g deionized water to adjust the apparent density of the lead paste to 4.1g / cm 3 , to obtain the lead paste for the negativ...

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Abstract

The invention relates to a preparation method for lead paste of a negative plate of a lead-acid battery and the negative plate. The preparation method for the lead paste comprises the steps of preparation of mixed slurry of carbon powder, barium sulfate, organic additive, binder and lead powder, spray drying and mixing to obtain the paste. The prepared lead paste is coated on a negative plate gate and is then cured and dried to obtain the negative plate of the battery. Polytetrafluoroethylene is adopted as the binder, the mixed slurry is subject to the spray drying through a high-speed centrifugal spray drier, and the temperature of an air inlet is controlled to be 180-250 DEG C; and mixed solution of dispersed fibers and deionized water is added into the sprayed powder to prepare the paste. The uniformity of mixing for the negative material can be improved effectively, the contact area of the carbon powder and the lead powder can be enlarged, the conductivity of the negative plate can be improved, and the charge acceptance capacity of the battery can be improved. Meanwhile, the sulfate process of the negative plate can be effectively mitigated, the rate of utilization of active substances can be increased, and the service life of the battery can be prolonged.

Description

technical field [0001] The invention relates to a preparation method of a negative plate of a lead-acid battery, in particular to a method for mixing negative electrode materials of a lead-acid battery by using a spray drying technology, and belongs to the technical field of the lead-acid battery. Background technique [0002] In 1997, Japan's M.Shiomi et al. (see Journal of Power Sources, 1997, 64, 147–152) reported increasing the content of carbon materials in the negative plates of valve-regulated lead-acid batteries, according to hybrid electric vehicles (HEV) and photovoltaic The operation mode of the power generation system is tested for simulated cycle life, which can effectively reduce the accumulation of lead sulfate and prolong the cycle life. During the discharge process, the carbon material can be on the negative plate PbSO 4 A conductive network is formed around the particles, thereby increasing the conductivity of the negative plate. Especially in recent year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/57H01M4/21
CPCY02E60/126Y02E60/10
Inventor 范娜李现红孙常慧李恒孔德龙钱逸泰
Owner SHANDONG UNIV
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