Zinc-manganese battery

Abstract

The invention is concerned with a kind of Zn-MnO2 battery and its product method belonging to cell technology field. It relates to bucket shell with bottom and wall, ring zinc bucket without cover as the cathode and inside of the said shell, manganese dioxide mixture as reactant, graphite as educing body of cell, false bottom sheet metal and closed cover on the top of bucket shell. The Zn-MnO2 battery is made up by the product of ring zinc bucket, the product of bucket shell, the product of cathode of Zn-MnO2 battery and assembling working procedure. The cathode of this cell is the ring zinc bucket, and the bucket shell having bottom is made up of plastic or other inorganic materials and the shell doesn't take part in electrochemistry reaction. This reduces the product cost and saves the dosage of zinc with simple craftwork. It solves the problems about liquid leakage of Zn-MnO2 battery and corrosion of electrical apparatus and circuit.

Description

Technical field [0001] The invention belongs to the technical field of batteries, and particularly relates to an environmentally-friendly zinc-manganese battery with low cost and good sealing performance. Background technique [0002] At present, the structure of a zinc-manganese dry battery includes a zinc cylinder as the negative electrode active material, in which a mixture containing manganese dioxide is chemically reacted with it, and a carbon rod as the battery's electrical energy exporter is fixed in the center, and The cover of the zinc cylinder and the false bottom metal sheet which is electrically connected to the bottom of the zinc cylinder for beautiful appearance. The preparation process is as follows: firstly, the metal zinc plate is punched into circular cakes, and then punched into a cylindrical structure with a bottom by a punching machine, and the metal zinc cylinder is filled with a mixture containing manganese dioxide and a carbon rod, and The metal zinc cylin...

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned operation for preparing zinc-manganese dry batteries and the prepared zinc-manganese dry batteries have the following disadvantages: (1) in the above-mentioned preparation process, the preparation of the zinc cylinder must be punched into a circular pie piece by a metal zinc plate, and then the It is punched by a punching machine, but due to the uneven thickness of the wall of the punched zinc cylinder, there are uneven reactions during use, and leakage is prone to cause corrosion of electrical appliances; (2) the above-mentioned zinc During the use of manganese dry batteries, the bottom of the zinc cylinder and about 70% of the wall of the zinc cylinder do not react. Therefore, the zinc cylinder formed by stamping is used not only as a reaction negative electrode but also as a container for manganese dioxide mixture. Caused the great waste of metallic zinc resource; (3) because of the reason of cost, there is certain difficulty in the recycling of dry battery, therefore, in the zinc cylinder of the lost zinc-manganese dry battery, contained harmful as corrosion inhibitor mercury, cadmium etc. Substances will cause unnecessary environmental pollution; (4) because the zinc cylinder constituting the negative electrode of the battery is punched into a circular cake sheet by metal zinc plate, and then punched by a punching machine, not only the process is complicated, but also because the punched The wall thickness of the finished zinc cylinder is uneven and the scrap rate is high

In the above structure, since the container used to hold the reactants is composed of a plastic tube, an insulating disc with a two-body structure, and a negative electrode iron bottom, after the battery is produced, the chemical reaction in the battery will be released inside the battery. A large amount of liquid and gas will be generated, which will easily cause the "two-body structure" to separate, resulting in liquid leakage at the bottom of the battery and scrapping

In addition, in the structure of the zinc-manganese battery, since the negative electrode of the battery is in direct contact with the negative electrode of the zinc cylinder and the iron bottom of the negative electrode to form the negative electrode of the entire battery, a phenomenon of low hydrogen evolution overpotential will occur, which will cause the battery to be scrapped in a very short time

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