Method and device for manufacturing alkaline battery

Abstract

The invention relates to a method and device for manufacturing an alkaline battery, in particular to a method and device for manufacturing an alkaline battery with low internal pressure. The method is characterized in that a battery body component and a battery sealing component are combined in a vacuum environment so that the internal pressure of the battery is reduced effectively. The device is mainly characterized in that a common vacuum device is improved to be specially used for the assembly of the battery body component and the battery sealing component so that the operation is simple and convenient and the assembly efficiency of the battery is effectively improved. The method and the device are easy to implement and have wide range of application. The practice proves that the method and the device have low cost, are easy and convenient to operate, can effectively reduce the internal pressure of the battery and can reduce the occurrence frequency of the self discharge an the electrolyte leakage of the battery due to long-term storage so as to ensure the reliability of the quality of the battery. The method and the device are suitable for producing the alkaline battery.

Description

technical field [0001] The invention relates to a manufacturing method and device of an alkaline battery, more specifically to a manufacturing method and a device thereof for reducing the inner pressure of the battery. Background technique [0002] Alkaline batteries are disposable batteries commonly used in the market. With people's requirements for high discharge performance, the performance of batteries after long-term storage, that is, the storage performance of batteries, also needs to be improved and improved accordingly. Generally speaking, alkaline batteries should not leak during the specified shelf life, and maintain sufficient power, so that they can be used normally on electrical appliances. Therefore, leakage and capacity reduction have become two major problems that affect battery storage performance and make the battery lose its use value. [0003] At present, the production method of alkaline batteries is to first make the positive electrode assembly of the ...

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Problems solved by technology

[0007] Finally, after the battery leakage occurs, due to the destruction of the battery sealing structure and the connection of the inside and outside of the battery, the air in the external environment will continue to infiltrate into the battery and continue to react on the zinc negative electrode (1), thereby further aggravating the damage of the battery. Self-discharge makes the battery fail prematurely under the dual constraints of leakage and capacity drop

[0008] The methods currently used to reduce the internal pressure of alkaline batteries mostly start with improving the materials for producing batteries, which will lead to an increase in the production cost of the battery. There are also technologies that propose sealing in a vacuum environment after the combination of the positive electrode assembly and the sealing assembly of the alkaline battery is completed. The idea of ​​this method to solve the internal pressure of alkaline batteries is to extract the internal gas of the battery through a vacuum environment during the sealing process of alkaline batteries, and at the same time improve the sealing strength. It has been proved to have a certain effect by experiments, but it does not grasp the fundamental point of the problem. The combination of the sealing assembly of the permanent battery and the battery body forms a sealed space inside, and because a certain amount of volume compression is performed in the radial and axial directions of the battery during the sealing process, the internal air pressure of the battery is greater than the external air pressure after the battery is sealed. , so this method does not grasp the fundamental point of the problem, and the effect is limited

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