Large-capacity super-capacitor and preparation method therefor

Abstract

The invention discloses a large-capacity super-capacitor, and the super-capacitor comprises a negative top cover assembly, a positive top cover assembly, a battery cell and a housing. The negative topcover assembly and the positive top cover assembly are welded and fixed on two ends of the battery cell, and the housing sleeves the battery cell. Two ends of the housing are respectively fixedly connected with the negative top cover assembly and the positive top cover assembly, and the negative top cover assembly includes a negative adapter piece and a negative pole welded and fixed at the center of the surface of the negative adapter piece. The negative pole is electrically connected with the negative adapter piece, and an insulating plastic layer is disposed at the periphery of the outer surface of a side wall of the negative pole, wherein the exterior of the insulating plastic layer is fixedly sleeved by a negative top cover piece. The super-capacitor solves a problem of large-currentconduction of a large-capacity super-capacitor, and there are the positive and negative electrode lugs with opposite polarities at the two ends of the battery cell and the corresponding current collecting pieces, the mandrels and insulating cement, and the positive and negative electrode lugs of the battery cell make area contact with the current collecting pieces, thereby greatly increasing thecurrent guiding areas of the charging and discharging of the battery cell, and enabling the battery cell to have the performances of large-current charging and discharging.

Description

technical field [0001] The invention belongs to the field of capacitor preparation, and relates to a large-capacity super capacitor and a preparation method thereof. Background technique [0002] A supercapacitor is a new type of energy storage element that uses the principle of an electric double layer to directly store electrical energy. Its capacity generally ranges from a few farads to tens of thousands of farads. It has a very high power density, and its charging and discharging speed is very fast. From the fully discharged state to the fully charged state, the charging and discharging performance of the supercapacitor affects the work of the supercapacitor. Although the existing supercapacitor has a large storage capacity, the efficiency of charging and discharging is low during the successful discharge process of a large current. And after using it for a long time, it will be short-circuited due to the contact between the capacitor and the shell due to the overflow of...

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Problems solved by technology

[0002] A supercapacitor is a new type of energy storage element that uses the principle of an electric double layer to directly store electrical energy. Its capacity generally ranges from a few farads to tens of thousands of farads. It has a very high power density, and its charging and discharging speed is very fast. From the fully discharged state to the fully charged state, the charging and discharging performance of the supercapacitor affects the work of the supercapacitor. Although the existing supercapacitor has a large storage capacity, the efficiency of charging and discharging is low during the successful discharge process of a large current. And after using it for a long time, it will be short-circuited due to the contact between the capacitor and the shell due to the overflow of the electrolyte

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