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

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

Example Embodiment

[0013] Example 1

[0014] This embodiment includes a pole group unit formed by winding a nickel positive electrode sheet, a zinc negative electrode sheet and a separator, 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 arranged between the group unit and the inner wall of the battery case, which completely isolates the pole group unit from the inner wall of the battery case.

[0015] Preparation: adopt the existing known method to prepare nickel positive electrode piece and zinc negative electrode piece, and then wind the pole piece and separator together to form a pole group unit; adopt acid electroplating tin method to coat a layer of metal tin on the surface of the battery shell; After the positive and negative plates are wound into a pole group unit, they are placed in the battery case, and then between the pole grou...

Example Embodiment

[0017] Example 2

[0018] In this embodiment, the inner wall surface 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 pole group unit and the inner wall of the battery case to completely isolate the pole group unit from the inner wall of the battery case Paper. The same as in Example 1.

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

Example Embodiment

[0020] Example 3

[0021] The lead-zinc alloy is sprayed and plated on the inner wall surface of the battery case by the electrospraying method, and the electrode group unit is completely isolated from the inner wall of the battery case by using a polytetrafluoroethylene diaphragm.

[0022] Also using the battery cycle life experiment described in Example 1, 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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