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Alkaline Ni-MH secondary battery and its preparation method

A secondary battery and alkaline technology, which is applied in the manufacture of alkaline batteries, alkaline batteries, battery pack components, etc., can solve problems affecting popularization and use, and limit the cycle life of nickel-zinc secondary batteries, so as to reduce the impact of poisoning , Improve the effect of cycle life

Inactive Publication Date: 2010-03-31
SHENZHEN ZHENGXINTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the surface of the storage container (i.e. "battery shell") for the nickel-based secondary battery to accommodate the pole group unit is nickel-plated, which limits the improvement of the cycle life of the nickel-zinc secondary battery and affects its performance. promotional use

Method used

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  • Alkaline Ni-MH secondary battery and its preparation method
  • Alkaline Ni-MH secondary battery and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] This embodiment includes an electrode group unit wound by a nickel positive electrode sheet, a zinc negative electrode sheet, and a diaphragm, a battery case for accommodating the electrode group unit, and an alkaline electrolyte, and the inner wall surface of the battery case is coated with a layer of tin; An alkali-resistant insulating sleeve is provided between the group sheet and the inner wall of the battery case to completely isolate the electrode group sheet from the inner wall of the battery case.

[0015] Preparation: Prepare a nickel positive electrode sheet and a zinc negative electrode sheet by a known method, and then wind the electrode sheet and the separator together to form an electrode group unit; use an acidic tin plating method to coat a layer of metal tin on the surface of the battery case; After the positive and negative electrodes are wound into electrode group units, they are placed in the battery case, and between the electrode group unit and the ...

Embodiment 2

[0018] In this embodiment, the surface of the inner wall of the battery case is coated with a layer of tin-lead alloy by electroless tin-lead alloy plating; an alkali-resistant tape is provided between the electrode group unit and the inner wall of the battery case to completely isolate the electrode group unit from the inner wall of the battery case Paper. The rest are the same as embodiment 1.

[0019] Also using the battery cycle life test described in Example 1, the 2A / 6A cycle life results are also more than 250 times.

Embodiment 3

[0021] Electrospraying is used to spray and plate lead-zinc alloy on the inner wall of the battery case, and a polytetrafluoroethylene diaphragm is used to completely isolate the electrode group unit from the inner wall of the battery case.

[0022] The battery cycle life test described in Example 1 is also used, and the 2A / 6A cycle life results are more than 230 times.

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Abstract

A method for preparing an alkaline Ni-MH secondary battery and its preparation method, wherein the alkaline Ni-MH secondary battery comprises a pole group unit formed by coiling a nickel positive plate, a zinc cathode plate and a barrier diaphragm, a battery case accommodating the pole group unit, and alkaline electrolytic solution, the inner wall surface of the battery case is coated with a layerof lead, stannum or zinc metal coat, or a alloy coating of any two of lead, stannum and zinc; an alkali proof insulating sheath, an insulation circle, a hydrophobic barrier diaphragm or an alkali proof masking tape are arranged between the pole group unit and the inner wall of the battery case for totally isolating the pole group unit from the battery case. The invention further provides a methodfor preparing the alkaline Ni-MH secondary battery. The alkaline Ni-MH secondary battery of the invention greatly decreases the poisoning infection of the nickel impurity to the cathode plate becausethe zinc cathode plate is isolated from the nickel on the inner wall of the battery case, thereby enhancing cyclic life of the Ni-MH secondary battery.

Description

technical field [0001] The invention relates to an alkaline secondary battery and a preparation method thereof, in particular to an alkaline nickel-zinc secondary battery and a preparation method thereof. Background technique [0002] The short life of the existing zinc-nickel batteries is the main problem that restricts the development of zinc-nickel batteries for a long time. The reason for the short life of zinc-nickel batteries is that in addition to the defects in the positive and negative electrode materials, electrolytes, and diaphragms, the structure and assembly process of the batteries have great influence on the development of zinc-nickel batteries. The performance of zinc-nickel batteries is also greatly affected. The zinc electrode of the zinc-nickel battery is very active, and the voltage is very negative, and zinc is an active metal, so it is very sensitive to impurities, and the impact of nickel on the negative electrode is also obvious. At present, the surf...

Claims

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Application Information

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IPC IPC(8): H01M10/28H01M2/02H01M50/119H01M50/124
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 章聪颖
Owner SHENZHEN ZHENGXINTONG TECH
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