Cathode piece of hydrogen-nickel battery, and method for fabricating hydrogen-nickel battery by using the cathode pieces

Abstract

The invention discloses a hydrogen-nickel battery negative electrode sheet and a method for manufacturing a hydrogen-nickel battery using the same. The negative electrode sheet is a double negative electrode sheet, and the manufacturing method comprises welding a single negative electrode short sheet at the end of a single negative electrode long sheet through a negative electrode connection substrate. Double negative electrode sheet, first weld a small piece of protective film with a width larger than the width of the negative electrode connection substrate on the diaphragm corresponding to the connection seam of the double negative electrode sheet, and then place the diaphragm welded with the protective film between the positive and negative electrode sheets, and then place the The double negative plate, diaphragm, and positive plate are rolled into a cylindrical shape and loaded into the battery case, and finally the nickel-hydrogen battery is assembled by injecting electrolyte, installing a cap and sealing ring. It can effectively control and manufacture pole pieces with different thicknesses and different amounts of negative electrode active materials, improve the utilization rate of negative electrode active materials and the performance of the battery, correspondingly reduce the thickness of double negative electrode pieces and occupy the volume of the shell, and reduce the battery life. The manufacturing cost and assembly difficulty significantly improve the manufacturing efficiency of the battery, and are especially beneficial to the manufacture of high-capacity batteries.

Description

Technical field [0001] The invention relates to the manufacture of electrodes for batteries for directly converting chemical energy into electric energy, and in particular to a nickel-hydrogen battery negative electrode sheet and a method for manufacturing the nickel-hydrogen battery using the same. Background technique [0002] Nickel-hydrogen battery is a new generation of high-energy alkaline secondary battery after cadmium-nickel battery. It has the characteristics of high capacity, high power, and pollution-free. It is one of the important development directions of today's secondary battery. The structure of the existing AA-type nickel hydrogen battery with a single negative electrode is as follows: figure 1 As shown, it is mainly composed of the positive electrode sheet 2, the negative electrode sheet 4, the separator 3, the battery case 5, and the electrolyte and the cap sealing ring. The negative electrode sheet 4 passes through the separator 3 to completely wrap the pos...

AI Technical Summary

Problems solved by technology

[0003] A technical problem to be solved by the present invention is to overcome the defects of excess capacity and low utilization rate of the active material at the tail of the existing negative electrode, and propose a negative electrode sheet for a nickel-hydrogen battery from the aspects of internal structure and process improvement of the battery, which can not only improve The utilization rate of the negative electrode active material can improve the performance of the battery

[0004] Another technical problem to be solved by the present invention is to overcome the defects of excess capacity and low utilization rate of the active material at the tail of the existing negative electrode, and propose a hydrogen battery using the above-mentioned nickel-hydrogen battery negative plate from the aspects of internal structure and process improvement of the battery. A method for manufacturing a nickel battery, which can not only improve the utilization rate of the negative electrode active material, but also reduce the amount of the negative electrode active material on the basis of ensuring the performance of the battery, reduce the cost of the battery, and improve the performance of the battery

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