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Small-sized sealing nickel hydride charging button cell and preparation method thereof

A button-type battery and nickel-metal hydride technology are applied in the field of small sealed nickel-metal hydride rechargeable button batteries for medical equipment and the field of preparation thereof, which can solve the problems of easy falling off of negative electrode active materials, affecting battery life, poor conductivity of positive electrode, and the like. To achieve the effect of increasing the amount of negative electrode added, long service life, and excellent conductive current collection effect

Active Publication Date: 2011-06-08
LIAONING JIUYI ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing nickel-metal hydride button battery, its process is basically the same as the disposable button battery, but its negative electrode is coated with a negative electrode active material on a conductive substrate such as a steel strip or foamed nickel, and loaded into the battery after punching. The problem with this method is that the negative electrode active material is easy to fall off, which affects the service life of the battery; the positive electrode of the positive electrode is coated on a conductive substrate such as nickel foam, punched and then layered into the battery case. The problem with this method is that the positive electrode is conductive. Poor performance, affecting battery discharge

Method used

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  • Small-sized sealing nickel hydride charging button cell and preparation method thereof
  • Small-sized sealing nickel hydride charging button cell and preparation method thereof
  • Small-sized sealing nickel hydride charging button cell and preparation method thereof

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Embodiment Construction

[0014] A small sealed nickel-metal hydride rechargeable button battery, the preparation method is as follows: image 3 As shown, the positive electrode conductive substrate 7 is evenly divided into equal parts, the positive electrode conductive substrate 7 is compacted to a certain thickness δ1 before coating the active material, and then the positive electrode active material is coated on the spaced positive electrode conductive substrate 7, The coating width is equal to the diameter of the positive electrode of the button battery, and the conductive substrate in the non-coated area is sealed with tape and compacted to 0.2 mm. After the active material is coated and compacted, the thickness is δ2, and a crease 11 is made between the coated area 9 and the non-coated area 10. The width of the crease is the same as the thickness of the rolled film in the coated area, and the positive electrode is punched with a die to conduct electricity. Substrate 7, the positive conductive sub...

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Abstract

The invention relates to a small-sized sealing nickel hydride charging button cell for medical devices and a preparation method thereof. The method comprises the following steps: firstly, dividing anode conductive base materials evenly; coating anode active materials on the spaced anode conductive base materials; making a crease between the coating area and non-coating area, wherein the width of the crease is the same as the roll forming thickness of the coating area; stamping the anode conductive materials into a continuously circular shape in an integrally stamping manner after rolling the anode active materials; then folding the anode conductive base materials into anode groups according to the crease; placing the folded anode group into an anode shell; covering a septum on the anode group; dipping electrolyte solution and placing an insulating ring into the anode shell; placing the integrally die-casting cathode group into a cathode shell with cathode conductive base materials, and covering the cathode shell on the anode shell; and finally pressing and sealing. The invention has good security, favorable charging performance, simple manufacturing process, long service life and is suitable for large-scale and quick production.

Description

technical field [0001] The invention relates to a small sealed nickel-hydrogen rechargeable button battery for medical equipment and a preparation method thereof. Background technique [0002] Button battery is a commonly used battery, mostly used in medical equipment, household toys and other industries. Its characteristics require the battery to be small in size and high in safety. Disposable button batteries are routinely used, and the harmful substances are mainly mercury, and lead is also a heavy metal, which is toxic to the human body. A waste button battery can pollute 600,000 liters of water, which is equal to the amount of water a person drinks in a lifetime. A large amount of toxic and harmful substances such as mercury, cadmium, lead, acid and alkali in waste batteries leak into the environment, which will cause serious pollution and harm. [0003] The conventional production process of disposable button battery is to put the positive electrode material into the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/30H01M10/28
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 刘国忠付亮
Owner LIAONING JIUYI ENERGY TECH
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