Mercury-free lead-free alkaline button battery

Abstract

The invention relates to a mercury-free lead-free alkaline button battery. The battery comprises a negative electrode cover, a negative electrode current collector, a sealing rubber ring, negative electrode zinc paste, a separator, a positive electrode material and a positive electrode housing, wherein the negative electrode current collector is arranged on the inner side of the negative electrode cover, the shape and size of the outer side of the negative electrode current collector are the same as those of the inner side of the negative electrode cover, the outer surface of the negative electrode current collector is in close fit with the inner surface of the negative electrode cover, and the inner surface of the negative electrode current collector is in contact with the negative electrode zinc paste. Aluminum, copper, aluminum alloy or copper alloy sheet with good conductive properties are utilized for manufacturing the negative electrode current collector, the surface of the aluminum, copper, aluminum alloy or copper alloy sheet is coated with indium, tin, indium alloy or tin alloy plating, and the collector is made by stamping. According to the invention, the negative electrode current collector is capable of effectively preventing the self-discharge hydrogen evolution of the battery, and also effectively avoiding phenomena such as gaseous distention, liquid leakage, cover blasting and even an explosion of the battery, which are caused by contact between the negative electrode zinc paste and the negative electrode cover, so that the safety performance and storage performance of the battery are improved. According to the invention, no deplating is needed, so that resources are saved, and the battery achieves environment-friendly and pollution-free effects.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a mercury-free lead-free alkaline button battery, including a mercury-free lead-free zinc-manganese button battery and a mercury-free lead-free silver oxide button battery. Background technique [0002] The existing production technology of mercury-free alkaline button cells is to directly plate indium or tin or indium-plated alloy or tin-plated alloy on the entire surface of the negative electrode iron cover of the battery by means of electroplating, chemical plating and deplating to prepare mercury-free alkaline Positive button battery negative current collector. It includes electroplating or electroless indium plating or tin plating or indium alloy plating or tin alloy plating on the entire surface of the negative electrode iron cover of the battery, and then removing the outer surface coating of the negative electrode cover of the battery with a deplating solution. Due to the struct...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a mercury-free lead-free alkaline button battery, which effectively solves the defects in the prior art of directly preparing the negative electrode current collector by electroplating or electroless plating on the entire surface of the negative electrode iron cover, and damages the inner coating of the negative electrode cover of the battery caused by deplating. , resulting in a chemical reaction of hydrogen evolution between the negative electrode zinc paste and the negative electrode cover iron substrate, causing safety problems such as battery inflation, leakage or even explosion

[0004] The invention does not need a deplating process, and effectively solves the problems of a large amount of heavy metal discharge in the existing process technology, causing serious pollution to the environment and waste of resources

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