Nickel-zinc secondary seal cylindrical alkaline battery with shell as cathode and manufacturing method for nickel-zinc secondary seal cylindrical alkaline battery

Abstract

The invention discloses a nickel-zinc secondary seal cylindrical alkaline battery with a shell as a cathode. The battery comprises a battery shell, a nickel plated cover, tin and copper plated tab anode plates, diaphragms, nickel plated tab cathode plates and a protective film, and is characterized in that the battery shell is the nickel-plated steel shell; each anode plate is prepared by coating an anode material on a tin-plated brass screen; each anode plate trough is formed by removing the anode material from the anode plate; an tin-plated copper tab which is arranged in each anode plate trough is welded with each tin-plated brass screen; the surface and the other side of each tin-plated copper tab positioned in each anode plate trough are pasted with an anode alkali-resisting tape; an anode tin-plated copper gasket, the tin-plated copper tabs and the bottom of the battery shell are sequentially welded; the cathode plates are welded with 1 to 3 nickel tabs; the surface and the other side of each nickel tab positioned in each cathode plate trough or rib with the nickel tab cathode plate are pasted with a cathode alkali-resisting tape; and the nickel tabs are welded with the nickel-plated cover. The invention also provides a method for manufacturing the battery. The battery has the advantages of rational structure, good electrical property, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a zinc-nickel secondary sealed cylindrical alkaline battery whose shell is a negative electrode and a manufacturing method thereof. Background technique [0002] For zinc-nickel secondary sealed cylindrical series alkaline batteries with the negative electrode shell, the steel shell originally used was firstly plated with a nickel layer, and then a layer of tin was plated on the outside of the nickel plated layer to improve the zinc electrode. Hydrogen evolution overpotential can reduce the corrosion of zinc electrodes, reduce the internal pressure of the battery, and prevent the phenomenon of battery alkali leakage. However, when the nickel-plated cap with secondary explosion-proof function realizes its function, the gas discharged contains alkaline electrolyte. , thus causing corrosion of the tin-plated layer on the outer surface of the battery casing, which not only affects ...

AI Technical Summary

Problems solved by technology

[0002] For zinc-nickel secondary sealed cylindrical series alkaline batteries with the negative electrode shell, the steel shell originally used was firstly plated with a nickel layer, and then a layer of tin was plated on the outside of the nickel plated layer to improve the zinc electrode. Hydrogen evolution overpotential can reduce the corrosion of zinc electrodes, reduce the internal pressure of the battery, and prevent the phenomenon of battery alkali leakage. However, when the nickel-plated cap with secondary explosion-proof function realizes its function, the gas discharged contains alkaline electrolyte. , thus causing corrosion of the tin-plated layer on the outer surface of the battery casing, which not only affects the electrical conductivity, but also makes it difficult for the appearance of the battery to meet the battery standard requirements, especially when it is used for a long time, this phenomenon is unavoidable

This problem is a serious obstacle to the market launch of zinc-nickel secondary sealed cylindrical alkaline series batteries with the negative electrode in the shell

In addition, the bottom of the shell is spot-welded with a negative electrode current collector, and the nickel-plated cap is spot-welded with a positive electrode current collector, but they are respectively connected to the negative electrode and positive electrode of the electrode group by crimping, and the contact resistance is relatively large. It is beneficial to maintain the battery capacity and prolong the service life, and the processing of the collector plate and the edge of the two ends of the electrode group are complicated, which reduces the production efficiency of the battery and increases the cost of the battery

In addition, there are still defects in the composition of the active material of the negative electrode material, and the use of a copper skeleton as a current collector is not conducive to further prolonging the battery life.

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