Low-temperature resistant negative lead paste of lead storage battery and preparation method of negative lead paste

A lead-acid battery and negative lead paste technology, applied in lead-acid battery, lead-acid battery construction, battery electrodes, etc., can solve the problems of low utilization rate of active materials, weak conductivity, difficulty in meeting low-temperature performance batteries, etc., and achieve higher capacity. and service life, improving low-temperature discharge capacity, and improving the effect of charging acceptance.

Active Publication Date: 2018-09-28
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Lignin and humic acid can improve the low-temperature performance of the battery and avoid the formation of a lead sulfate passivation layer on the negative plate, thereby preventing the further reaction of the negative lead active material and reducing the capacity. Therefore, these two substances are usually added to the negative electrode paste formula Substances, but the general sodium lignosulfonate and humic acid formulations can only meet the common standards for batteries, and it is difficult to meet the standards for batteries with high low-temperature performance requirements, such as the standard of minus 40°C for starter batteries and the standard for capacity discharge of electric vehicles at minus 20°

Method used

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  • Low-temperature resistant negative lead paste of lead storage battery and preparation method of negative lead paste

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Embodiment 1

[0045] 1. Negative electrode paste formula: 100kg of lead powder, 0.7kg of superfine strontium sulfate or barium sulfate, 0.12kg of sodium lignosulfonate, 0.6kg of humic acid, 0.5kg of rubber bowl extract, 3# synthetic mixture (1.045g / cm 3 aqueous solution) 0.8kg, carbon nanotubes 0.15kg, nano Ketjen black 0.08kg, conductive carbon fiber (length 3mm) 0.12kg, hydroxymethylcellulose sodium CMC 0.3kg, dilute sulfuric acid (1.30~1.40g / cm 3 )7.8kg, production water 11.5kg.

[0046] 2. According to the mixing process of Comparative Example 1, negative electrode lead paste was prepared.

Embodiment 2

[0048] 1. Negative lead paste formula:

[0049] Lead powder 100kg;

[0050] Negative electrode additives: ultrafine strontium sulfate or barium sulfate 0.7kg, sodium lignosulfonate 0.12kg, humic acid 0.6kg, rubber bowl extract 0.5kg, 3# synthetic mixture (1.045g / cm 3 aqueous solution) 0.8kg, carbon nanotubes 0.15kg, nano Ketjen black 0.08kg, conductive carbon fiber (length 3mm) 0.12kg, sodium hydroxymethyl cellulose CMC 0.3kg;

[0051] Production water 11.5kg;

[0052] Synthetic acid (density 1.30~1.40g / cm 3 sulfuric acid solution) 7.8kg.

[0053] 2. Preparation method

[0054] (1) Put the synthetic tanning agent into a stainless steel container, pass in 0.3-0.5MPa water vapor, and blow the solid synthetic tanning agent directly through the steam nozzle until the synthetic tanning agent is blown into a liquid state, then add 2 times the volume of pure water, Cool the synthetic tanning agent aqueous solution to 20-30°C, then adjust the density to 1.045±0.005g / cm with pure ...

Embodiment 3

[0061] 1. Negative lead paste formula:

[0062] Lead powder 100kg;

[0063] Negative electrode additives: ultrafine strontium sulfate or barium sulfate 0.8kg, sodium lignosulfonate 0.11kg, humic acid 0.5kg, rubber bowl extract 0.4kg, 3# synthetic mixture (1.045g / cm 3 Aqueous solution) 1.0kg, carbon nanotube 0.17kg, nano Ketjen black 0.06kg, conductive carbon fiber (length 3mm) 0.13kg, sodium hydroxymethyl cellulose CMC 0.4kg;

[0064] Production water 11.5kg;

[0065] Synthetic acid (density 1.30~1.40g / cm 3 sulfuric acid solution) 7.3kg.

[0066] 2. Preparation method

[0067] (1) Put the synthetic tanning agent into a stainless steel container, pass in 0.3-0.5MPa water vapor, and blow the solid synthetic tanning agent directly through the steam nozzle until the synthetic tanning agent is blown into a liquid state, then add 2 times the volume of pure water, Cool the synthetic tanning agent aqueous solution to 20-30°C, then adjust the density to 1.045±0.005g / cm with pure w...

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Abstract

The invention discloses low-temperature resistant negative lead paste of a lead storage battery and a preparation method of the negative lead paste, and belongs to the technical field of storage battery preparation. The negative lead paste comprises lead powder, a negative additive, water and paste synthesis acid, wherein the negative additive comprises the constituents based on 100 parts by weight of the lead powder: 0.5-1.0 part of strontium sulfate or barium sulfate, 0.1-0.15 part of sodium lignosulphonate, 0.4-0.8 part of humic acid, 0.3-0.6 part of valonea extract, 0.6-1.2 parts of synthesis tanning agent, 0.1-0.2 part of carbon nanotube, 0.05-0.1 part of nanometer Ketjen black, 0.1-0.15 part of conductive carbon fiber and 0.1-0.5 part of carboxymethyl cellulose sodium. During preparation of the negative lead paste, the additive is pre-processed, and the negative lead paste is high in dispersity. The low-temperature discharging capacity of the storage battery produced by employingthe negative lead paste can be improved by 10-25%, and the service lifetime under a low-temperature environmental is prolonged by 20-30%.

Description

technical field [0001] The invention relates to the technical field of storage battery preparation, in particular to a low-temperature resistant lead storage battery negative electrode lead paste and a preparation method thereof. Background technique [0002] Lead-acid batteries are used more and more in the fields of communication and energy storage. However, in the alpine regions, since the lowest temperature in winter can drop below -20°C, when the ambient temperature is lower than -20°C, the capacity of ordinary lead-acid batteries will decrease. Reduced to below 60% at normal temperature, the cycle life will also drop to below 40% at normal temperature. This is mainly due to the decline in the charging acceptance capacity of conventional lead-acid batteries in low-temperature environments. During the charging process, due to the PbSO 4 Solubility and dissolution rate of the low temperature will be reduced, so that the pre-charging process is restricted. The battery ca...

Claims

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Application Information

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IPC IPC(8): H01M4/57H01M10/42H01M10/12
CPCH01M4/57H01M10/12H01M10/4235Y02E60/10Y02P70/50
Inventor 程艳青熊正林方明学陆辉刘海凤
Owner TIANNENG BATTERY GROUP
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