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Zinc-nickel battery negative electrode sheet and preparation method thereof as well as zinc-nickel battery using negative electrode sheet

A battery negative electrode, zinc-nickel battery technology, applied in battery electrodes, alkaline battery electrodes, circuits, etc., can solve the problems of battery short circuit hidden danger, unfavorable winding core into the shell, plate burrs, etc., to increase the effective negative electrode/positive electrode. Capacity ratio, beneficial to increase and maintain, reduce the effect of battery internal pressure

Active Publication Date: 2014-03-05
XINXIANG CHAOLI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is usually an unavoidable problem in the winding battery: during the winding process of the electrode plate, as the number of winding turns increases, the winding core is deformed to form an ellipse, which is not conducive to the winding core entering the shell, and it is also easy to make the electrode The burrs on the board will cause potential short circuit of the battery, especially for high-capacity batteries.
[0003] At present, there is no report on the manufacturing process of zinc negative electrodes with gradient thickness distribution for zinc-nickel secondary batteries.

Method used

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  • Zinc-nickel battery negative electrode sheet and preparation method thereof as well as zinc-nickel battery using negative electrode sheet
  • Zinc-nickel battery negative electrode sheet and preparation method thereof as well as zinc-nickel battery using negative electrode sheet
  • Zinc-nickel battery negative electrode sheet and preparation method thereof as well as zinc-nickel battery using negative electrode sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Preparation of the positive electrode: 90g of spherical nickel hydroxide, 5g of cobaltous oxide and 5g of T255 nickel powder were mixed evenly with an appropriate amount of CMC with a mass concentration of 2.5% and a PTFE aqueous solution with a mass concentration of 60% to make a positive electrode slurry, and then drawn The slurry is put into the foamed nickel pre-pressed to a certain thickness, dried, rolled, and cut into a nickel positive electrode with a length and width of 90mm×43mm.

[0015] Preparation of the negative electrode: mix 86g of zinc oxide, 6g of bismuth oxide, 8g of calcium hydroxide with an appropriate amount of 2.5% CMC aqueous solution, 4% polyvinyl alcohol solution and 60% PTFE aqueous solution. The negative electrode slurry is made, coated on both sides of the tin-plated punched copper strip through a slurry drawing die, dried, rolled, and cut into a zinc negative electrode with a length and width of 122mm×43mm and a gradient thickness. The speci...

Embodiment 2

[0021] The positive electrode preparation of the control group is the same as the above-mentioned specific embodiment, and the production material and formula of the negative electrode sheet are the same as the above-mentioned specific embodiment. Sheets, the manufacturing method of the battery is also basically the same as the above-mentioned specific embodiment, and there is no need to distinguish the front and rear ends of the winding.

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Abstract

The invention discloses a zinc-nickel battery negative electrode sheet and a preparation method thereof as well as a zinc-nickel battery using the negative electrode sheet. The technical scheme of the invention has the key points as follows: the zinc-nickel battery negative electrode sheet is prepared by adopting a continuous double-surface sizing process and the thicknesses of the negative electrode sheet are in graded distribution, wherein the thickness of the battery negative electrode sheet in an area with a relatively high reaction efficiency is 0.31-0.38mm, the thickness of the battery negative electrode sheet in an area with a relatively low reaction efficiency namely a contact part between the battery negative electrode sheet and a battery steel shell is 0.24-0.28mm, and the connection part of the battery negative electrode sheets of the two areas is in circular arc transition. The invention also discloses the preparation method of the zinc-nickel battery negative electrode sheet and the zinc-nickel battery using the negative electrode sheet. According to the invention, by reducing the dosage of active substances at the tail part of the battery negative electrode sheet, the inner space of the battery can be improved and the internal pressure of the battery can be reduced to facilitate the increase and maintenance of electrolyte, so that the cycle life of the battery is obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of zinc-nickel secondary batteries, and in particular relates to a zinc-nickel battery negative electrode sheet, a preparation method thereof, and a zinc-nickel battery using the negative electrode sheet. Background technique [0002] In the existing cylindrical zinc-nickel secondary batteries, the positive electrode and the negative electrode are usually separated by a separator in a winding manner, and then rolled into a cylindrical battery steel case after being stacked, and then an electrolyte is added to seal the battery and form it. Finish the preparation. Among them, the active material of the positive electrode is generally spherical nickel hydroxide, which is usually made of foamed nickel as the plate skeleton, which is pressed by drawing slurry or dry powder infiltration; the active material of the negative electrode is zinc oxide or calcium zincate, which is made of copper The mesh or copper stri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/24H01M4/26
CPCY02E60/124H01M4/24H01M4/28H01M2004/021Y02E60/10
Inventor 上官恩波李晶李全民常照荣赵桐辉郭丹
Owner XINXIANG CHAOLI NEW ENERGY
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