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
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[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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