Preparation method of negative electrode lead plaster of lead-acid storage battery and negative electrode plate

A lead-acid battery and negative electrode paste technology, applied in the direction of lead-acid battery electrodes, battery electrodes, chemical instruments and methods, etc., can solve the problems of reduced electrochemical activity, end of battery life, etc., to reduce energy consumption and water consumption , cost reduction effect

Active Publication Date: 2021-03-02
FENGFAN
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AI Technical Summary

Problems solved by technology

[0004] When the lead-acid battery is in a partially charged state that is not fully charged for a long time, it is very easy to cause PbSO in the negative plate 4 Continuously grow into complete and coarse crystal grains, which reduces its electrochemical activity and leads to the end of the battery's service life

Method used

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  • Preparation method of negative electrode lead plaster of lead-acid storage battery and negative electrode plate
  • Preparation method of negative electrode lead plaster of lead-acid storage battery and negative electrode plate
  • Preparation method of negative electrode lead plaster of lead-acid storage battery and negative electrode plate

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preparation example Construction

[0041] The prepared barium-doped carbon nitride is added to the negative electrode paste of the battery as an additive material, and the preparation method of the negative plate includes the following steps:

[0042] ①Lead powder, short fiber, lignin, humic acid, barium sulfate, barium doped carbon nitride, carbon material according to 100: (0.05-0.5): (0-1.0): (0-1.0): (0-2.0 ): (0.1-1.0): (0-1.0) mass ratio for stirring and mixing;

[0043] ② Add water and sulfuric acid aqueous solution to the mixture obtained in step ① in sequence, and stir well for 1-30 minutes respectively to obtain negative electrode paste, the density of which is 3.5-4.5g / cm 3 ;

[0044] ③Scratch the lead paste evenly on the grid, the thickness of the lead paste is 0.5-10mm, cure at 20-80°C for 1-50h, the relative humidity during the curing process is 90-100%, and then dry at 50-100°C for 0.5 -24h, the relative humidity in the drying process is 0-20%, and the negative plate is obtained.

[0045] In t...

Embodiment 1

[0047] 1000g of lead powder with an oxidation degree of 80%, 3g of barium-doped carbon nitride additive, 0.6g of polyester fiber with a length of 3mm, 2.0g of sodium lignosulfonate, 3.0g of humic acid, 5.0g of fine barium sulfate, Mix 2.0g of carbon material evenly, add 110g of pure water and 85g of it with a density of 1.4g / cm 3 dilute sulfuric acid, stir to obtain the required negative lead paste, and then make the negative plate according to the above method, weld the negative plate with the positive plate and PE diaphragm, and get a 2V12Ah lead-acid single battery after chemical formation. The number of poles is 3 positive poles and 2 negative poles. The battery number is 1#. It is tested for 20hr, 0°C charge acceptance and continuous 17.5% cycle life. See Table 1 for the experimental results.

Embodiment 2

[0049] 1000g of lead powder with an oxidation degree of 80%, 5g of barium-doped carbon nitride additive, 0.6g of polyester fiber with a length of 3mm, 2.0g of sodium lignosulfonate, 3.0g of humic acid, 5.0g of fine barium sulfate, Mix 2.0g of carbon material evenly, add 110g of pure water and 85g of it with a density of 1.4g / cm 3 dilute sulfuric acid, stir to obtain the required negative lead paste, and then make the negative plate according to the above method, weld the negative plate with the positive plate and PE diaphragm, and get a 2V12Ah lead-acid single battery after chemical formation. The number of poles is 3 positive poles and 2 negative poles. The battery number is 2#. It is tested for 20hr, 0°C charge acceptance and continuous 17.5% cycle life. See Table 1 for the experimental results.

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Abstract

The invention discloses a negative electrode lead plaster of a lead-acid storage battery. The negative electrode lead plaster comprises the following components: lead powder, short fibers, lignin, humic acid, barium sulfate, barium-doped carbon nitride, a carbon material, purified water and dilute sulfuric acid in a mass addition ratio of 100:(0.05-0.5):(0-1.0):(0-1.0):(0-2.0):(0.1-1.0):(0-1.0):(10-15):(6-10). A barium-doped carbon nitride additive is added into the negative electrode lead plaster, so that the sulfation of the negative electrode plate is avoided, and the effect of prolonging the service life of the lead-acid battery is achieved; and the negative plate prepared by the method has higher partial charge state cycle life and static charging acceptance than a common negative plate.

Description

technical field [0001] The invention relates to a preparation method of a lead-acid storage battery negative electrode paste and a negative electrode plate, and belongs to the technical field of lead-acid storage batteries. Background technique [0002] With the rapid development of my country's economy and the improvement of people's living standards, the number of cars is getting higher and higher, especially in the morning and evening peak hours in cities, cars will experience multiple starts during driving. This causes the lead-acid battery in the car to be in a partially charged state for a long time, which affects the service life of the lead-acid battery. [0003] Generally speaking, lead-acid batteries are mainly composed of positive plates, negative plates, electrolyte, separators and shells. Among them, the plate made by coating the lead paste on the grid plays a vital role in the electrical performance of the lead-acid battery. The main active substance in the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/20H01M4/21C01B21/082
CPCC01B21/0605C01P2002/72C01P2002/85C01P2004/03C01P2004/61C01P2006/12H01M4/20H01M4/21H01M4/62H01M4/628Y02E60/10
Inventor 孙海涛陈二霞王再红霍玉龙高鹤闫娜陈志雪柴琳
Owner FENGFAN
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