Preparation method of flexible packed super-capacitor

Abstract

The invention discloses a preparation method of a flexible packed super-capacitor. The improvement of the invention includes that a liquid injection pipe with a copper bar is inserted into one side of an aluminum-plastic film bag after an electrical core is arranged in the bag, the open part and the joint part of the bag and the pipe are heat-sealed under the temperature of 200-300 degrees Celsius; the copper bar is pulled out and the bag is vacuumized to be under 0.05-0.09MPa, then is injected with electrolyte and laid aside for 8-12 hours under normal temperature, and then has formation process; the bag is vacuumized along with the formation, meanwhile, the inside pressure of the bag is kept within 0.01-0.05MPa, and the lost electrolyte is supplemented after the formation; finally, the protruding part of the liquid injection pipe is released from heat seal. The super-capacitor produced in the method has no gas expansion, avoids potential explosion danger, and guarantees good security and reliability; furthermore, the invention can ensure sufficient capacitance, improves the coherence of single body combination and cycle life of the module, and obtains excellent charge-discharge performance.

Description

technical field [0001] The invention relates to a method for manufacturing a supercapacitor, in particular to a method for manufacturing a soft-packaged supercapacitor. Background technique [0002] Supercapacitors also belong to electric double layer capacitors, which are currently the largest type of electric double layer capacitors. The basic principle is the same as other types of electric double layer capacitors. They all use activated carbon porous electrodes and electrolytes to form an electric double layer structure. Get super capacity. [0003] In an electric double layer capacitor, the activated carbon material is used to make porous electrodes, and an electrolyte solution is filled between the opposite carbon porous electrodes. When a voltage is applied to both ends, positive and negative electrons are collected on the opposite porous electrodes, while the electrolyte solution The positive and negative ions will be gathered on the interface opposite to the positi...

AI Technical Summary

Problems solved by technology

[0004] Usually, supercapacitors will generate gas when they are first formed. If they are not discharged in time, the electrochemical performance of supercapacitors will be affected. When the internal pressure reaches a certain level, if the pressure is not released in time, explosions may occur.

Especially in flexible packaging supercapacitors, once the gas is generated after it is fully encapsulated, it will be difficult to discharge, and the possibility of the above phenomenon will be greatly increased.

[0005] At present, there is no proper solution to the gas emission problem in the production process of flexible packaging supercapacitors.