Treatment process for edge of coated-type alkaline accumulator pole piece and auxiliary edge-covering equipment

Abstract

The invention relates to a treatment process for the edge of a coated-type alkaline accumulator pole piece and auxiliary edge-covering equipment. The process comprises the following steps of: covering an alkali-resistant insulating material having a width of 2-10 mm on the edge of foamed nickel by an automatic edge-covering machine before filling active substances in a cell pole piece preparing raw material namely foamed nickel; and compressing the part of the foamed nickel covered by the alkali-resistant insulating material until the thickness of the part is less than 1.5 mm; and finally filling the active substances in the edge-covered foamed nickel. After the process method is adopted, because the burred edge of the foamed nickel is covered by the smooth insulating material, the edge has no need to be trimmed during the subsequent machining; and because the burred edge of the foamed nickel is covered by the smooth insulating material, the edge cannot be damaged during the subsequent machining for the pole piece, and a powder in the pole piece cannot fall off, so that the problems of short circuit and low voltage caused by the burrs on the edge of the pole piece and the powder falling-off of the edge during the use process of the accumulator are eliminated.

Description

technical field [0001] The invention relates to a process for treating the edge of the pole piece of a coated alkaline storage battery and special equipment thereof. Through the process, the problems of short circuit and low voltage caused by edge burrs and powder removal of the pole piece of the alkaline storage battery are solved. Background technique [0002] Generally, the positive electrode of the coated alkaline storage battery uses foamed nickel as the carrier, and the edge of the foamed nickel carrier has burrs, such as figure 1 As shown, improper handling of this burr can lead to short circuit and low voltage of the battery. The current popular positive electrode edge burr treatment method is to cut off the edge by 1.5~2mm. In order to further eliminate the edge edge burr, the edge of the electrode piece is ground to an angle of 30~45° by specially designed equipment; the electrode processed by the above traditional process method slice status as Figure 2-4 As sh...

AI Technical Summary

Problems solved by technology

[0002] Generally, the positive electrode of the coated alkaline storage battery uses foamed nickel as the carrier, and the edge of the foamed nickel carrier has burrs, such as figure 1 As shown, improper handling of this burr can lead to short circuit and low voltage of the battery

The current popular positive electrode edge burr treatment method is to cut off the edge by 1.5~2mm. In order to further eliminate the edge edge burr, the edge of the electrode piece is ground to an angle of 30~45° by specially designed equipment; the electrode processed by the above traditional process method slice status as Figure 2-4 As shown, there are the following defects: ① Due to the good toughness of nickel foam, there are still tiny burrs on the edge of the pole piece after cutting

②Regardless of whether the edge of the pole piece with burrs is trimmed or not, the edge of the pole piece is open. Since the particle size of the positive electrode powder is very small, although various manufacturers use different types of adhesives and anti-powdering technology of the pole piece, the fine powder is still very small. It is easy to fall off from the edge of the pole piece, and the powder that falls off gathers at the bottom of the battery, which eventually leads to short circuit and low voltage of the battery

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