Electric double-layer capacitor and manufacturing method thereof

Abstract

The invention relates to an electric double-layer capacitor and a manufacturing method thereof. A screen printing method is adopted to enable a conductive adhesive to be made into a circular conductive adhesive sheet with a certain diameter and a certain thickness, and then, the circular conductive adhesive sheet is transferred to an inner shell and an outer shell. Compared with an existing method of adopting a dispensor to inject the conductive adhesive to the inner shell and the outer shell, and then, adopting polarity electrodes to carry out flattening and shaping on the conductive adhesive, the method enables the conductive adhesive sheet prepared through the manufacturing method to be regular in shape and uniform in thickness; and the diameter of the conductive adhesive sheet can be designed to be in an optimum size. The prepared electric double-layer capacitor can work for 1000 hours under the temperature of 70 degrees and the voltage of 2.5V; the internal resistance increase rate of the double-layer capacitor is low; capacity reduction rate is low; and performance is more stable and reliable.

Description

technical field [0001] The invention relates to the production field of electrical components, in particular to an electric double layer capacitor and a manufacturing method thereof. Background technique [0002] Button-type electric double layer capacitors have advantages such as high energy density, better charge-discharge cycle than secondary lithium batteries, and affinity characteristics. Therefore, in recent years, they have been often used as backup power sources for portable devices. In general, the life of an electric double layer capacitor is semi-permanent, and it is characterized by very slight changes in characteristics during charge and discharge cycles (Cycle), but when used at high temperature or high voltage, the resistance of the electric double layer capacitor changes rapidly, Capacity is also reduced. This situation is usually caused by a fatal defect in manufacturing such as leakage of electric double layer capacitors. However, for electric double laye...

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Problems solved by technology

If the polarized electrodes are pasted in this way, the unfolded state of the conductive adhesive cannot be distributed in a circular shape, and it is difficult to obtain sufficient sticking points between the polarized electrodes and the inner shell and the outer shell. / Under high voltage, the sticking point between the polarized electrode and the inner shell and outer shell made of SUS stainless steel will gradually become smaller, and even the polarized electrode will be separated from the inner shell and outer shell, which not only increases the internal resistance but also shortens it. service life, and cases that cause a sharp reduction in capacity

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