Impregnation method of aluminum electrolytic capacitor core package

Abstract

The invention discloses an impregnation method of an aluminum electrolytic capacitor core package. The method comprises the following steps of preheating the core package; and then immersing the preheated core package into an electrolyte for impregnation treatment in a vacuum state, wherein before the core package is immersed into the electrolyte, a temperature difference between the core packageand the electrolyte is controlled to be above a room temperature. As the electrolyte is cold, and the temperature difference between the core package and the electrolyte is greater than or equal to the room temperature, a material in the core package is shrunk after being suddenly cooled due to the temperature difference; the relatively cold electrolyte is in direct contact with the relatively hotcore package, the relatively hot core package is used for heating the contacted electrolyte and the surrounding electrolyte; and after heating, viscosity of the electrolyte is reduced so that the electrolyte can permeate into the core package more easily, impregnation time is greatly shortened, impregnation efficiency and consistency are improved, performance of a capacitor is increased, the electrolytes with various viscosities can be impregnated, and a requirement to the viscosity of the electrolyte is reduced.

Description

Technical field [0001] The invention relates to the technical field of capacitor production, in particular to an impregnation method for aluminum electrolytic capacitor core packages. Background technique [0002] In the production of traditional aluminum electrolytic capacitors, the core package generally adopts the disordered vacuum impregnation method, that is, the core package is randomly placed in the impregnation tank and then immersed in a vacuum state for 10-20 hours to ensure the quality of the impregnation. But there are the following shortcomings: First, the impregnation time is long, generally 5-20 hours. For products with large core diameters, the conventional impregnation time is as high as 15-20 hours; the second is insufficient impregnation, which will reduce the capacity of the capacitor. , The loss angle is increased; third, because the core package is messy, the leads on the core package are easy to bend. [0003] In order to overcome the above problems, improve...

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Problems solved by technology

But there are the following defects: First, the impregnation time is long, generally 5-20 hours. For products with large core diameters, the conventional impregnation time is as high as 15-20 hours; second, the impregnation is insufficient, which will reduce the capacity of the capacitor , the loss angle increases; the third is that the lead wires on the core package are easy to bend due to the disorder of the core package

[0005] First, the impregnation time of the core package is still relatively long. The core inclusion immersion time for small-sized products is generally more than 3 hours, and the core inclusion immersion time for large-scale products is at least 10 hours. Longer impregnation time makes the entire operation time longer. Significantly increased the operating cycle and operating costs, reducing production efficiency

[0006] The second is that the impregnation effect of the whole batch of core packs is generally consistent. The core packs are made of aluminum foil and electrolyte, so the tightness of each core pack is different, and the viscosity of different positions in the electrolyte will be different. In the case of impregnation time, some core packages in the whole batch of core packages have been soaked, some core packages have just been soaked, and some core packages have unsaturated parts, which leads to different impregnation degrees of each core package in the whole batch, resulting in the failure of the finished capacitor. reduced consistency

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