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A kind of preparation method of nickel-metal hydride power battery negative electrode sheet

A power battery and negative pole piece technology, which is applied in the direction of alkaline battery electrodes, batteries, circuits, etc., can solve the problems of poor toughness of the negative pole piece, easy powder removal, etc., so as to achieve not easy to break, improve safety and life, and high toughness Effect

Inactive Publication Date: 2017-02-15
DALI DEFEI NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing the negative electrode sheet of a nickel-metal hydride power battery, which solves the problems of poor toughness and easy powder removal of the negative electrode sheet in the existing dry preparation method

Method used

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Examples

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Effect test

preparation example Construction

[0029] The preparation method of a kind of nickel-hydrogen power battery negative pole piece of the present invention, specifically implement according to the following steps:

[0030] step 1,

[0031] Mix sodium carboxymethyl cellulose and deionized water at a mass ratio of 1.3:98.5 to 98.8: first slowly pour sodium carboxymethyl cellulose into deionized water, then stir continuously at a frequency of 20-25Hz until Sodium carboxymethyl cellulose solution is obtained until the sodium carboxymethyl cellulose solution is fully dissolved;

[0032] Step 2,

[0033] Weigh the following raw materials respectively by mass percentage:

[0034] 83% to 85% of hydrogen storage alloy powder, 13% to 15% of sodium carboxymethyl cellulose solution prepared in step 1, 0.3% to 0.5% of conductive carbon black, and 0.7% to 0.9% of SBR emulsion with a mass concentration of 50%. %, deionized water 0.6% ~ 0.8%, the sum of the above components is 100%;

[0035] Step 3,

[0036] Add the conducti...

Embodiment 1

[0052] Mix sodium carboxymethyl cellulose with deionized water at a mass ratio of 1.3:98.5: first pour sodium carboxymethyl cellulose into deionized water slowly, then stir continuously at a frequency of 20 Hz until the carboxymethyl cellulose Sodium carboxymethyl cellulose solution is obtained until the plain sodium solution is fully dissolved;

[0053] Weigh the following raw materials respectively by mass percentage:

[0054]83% of hydrogen storage alloy powder, 15% of sodium carboxymethyl cellulose solution, 0.5% of conductive carbon black, 0.7% of SBR emulsion with a mass concentration of 50%, 0.8% of deionized water, and the total content of the above components is 100%;

[0055] Add the weighed conductive carbon black into the sodium carboxymethyl cellulose solution, stir at a frequency of 10 Hz for 5 minutes, then adjust the frequency to 20 Hz and continue stirring until the conductive carbon black is fully suspended in the sodium carboxymethyl cellulose solution, Mi...

Embodiment 2

[0057] Mix sodium carboxymethyl cellulose and deionized water at a mass ratio of 1.3:98.6: first pour sodium carboxymethyl cellulose into deionized water slowly, then stir continuously at a frequency of 21 Hz until the carboxymethyl cellulose Sodium carboxymethyl cellulose solution is obtained until the plain sodium solution is fully dissolved;

[0058] Weigh the following raw materials respectively by mass percentage:

[0059] 84% of hydrogen storage alloy powder, 14% of sodium carboxymethylcellulose solution, 0.3% of conductive carbon black, 0.9% of SBR emulsion with a mass concentration of 50%, 0.8% of deionized water, and the total content of the above components is 100%;

[0060] Add the weighed conductive carbon black into the sodium carboxymethylcellulose solution, stir at a frequency of 12Hz for 4.5min, then adjust the frequency to 21Hz and continue stirring until the conductive carbon black is fully suspended in the sodium carboxymethylcellulose solution , Prepare m...

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Abstract

The invention discloses a preparation method for a negative electrode piece of a nickel hydrogen power battery. The preparation method comprises the following steps: in percentage by weight, mixing 83%-85% of hydrogen storage alloy powder, 13%-15% of a sodium carboxymethylcellulose solution, 0.3%-0.5% of conductive carbon black, 0.7%-0.9% of SBR (styrene butadiene rubber) emulsion and 0.6%-0.8% of de-ionized water to prepare negative electrode slurry, heating the slurry to a proper temperature, and performing slurry drawing and roller press briquetting to prepare the negative electrode piece of the power battery. According to the preparation method, the raw materials for manufacturing the electrode plate are converted into liquid slurry from solid powder, so that the problem of diffuse pollution due to falling of metal powder in a process of preparing the negative electrode piece by a dry process is solved and the production cost is reduced; moreover, the prepared negative electrode plate is relatively high in toughness and relatively low in self discharge rate, so that the negative electrode plate is not liable to be broken, the reliability of the battery is greatly improved, and the service life of the battery is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of power battery preparation, and in particular relates to a method for preparing a negative pole piece of a nickel-hydrogen power battery. Background technique [0002] With the development of society and the depletion of oil resources, the field of electric power has attracted more and more attention, and the research on power batteries has reached an unprecedented new stage. The so-called power battery mostly refers to the battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts. Due to the harsh conditions of use, it must have the characteristics of high energy density, long service life, safety and reliability. Therefore, its preparation process It also needs continuous improvement. [0003] At present, the negative electrode of the power battery in the industry is basically made of dry powder coating. Although the preparation process is simple, the dry powd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/26H01M4/32
CPCH01M4/26H01M4/32H01M2220/20Y02E60/10
Inventor 张杰王图强贾飞温杨厚胤
Owner DALI DEFEI NEW ENERGY TECH CO LTD
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