What are the characteristics of supercapacitor modules?

Supercapacitors have excellent pulse charge-discharge and large-capacity energy storage functions, and the single-unit capacity has now reached the 10,000-farad level. It is an energy storage element between electrostatic capacitors and batteries. Farad capacitors regard electric double-layer supercapacitors as 2 inactive porous plates suspended in an electrolyte, and a voltage is applied to the 2 plates. The potential applied to the positive plate attracts the negative ions in the electrolyte, and the negative plate attracts the positive ions, thus forming an electric double layer capacitor on the surface of the two electrodes . Fast charging. Supercapacitor charging is a physical process of charging and discharging of the electric double layer or a fast and reversible chemical process on the surface of the electrode material. It can be charged with a large current and can complete the charging process within tens of seconds to several minutes. Charge.

The electrochemical reactions that occur in the charging and discharging process of supercapacitors have good reversibility, and are not prone to a series of end-of-life phenomena such as crystal transformation, falling, and dendrite penetration of the active material in batteries. The theoretical cycle life is infinite, and it can actually reach more than 100,000 times, which is 10 to 100 times higher than that of batteries. Supercapacitors have high charge and discharge efficiency, have a certain ability to withstand overcharge and overdischarge, can be repeatedly charged and discharged stably, and theoretically do not require maintenance. Supercapacitors do not use heavy metals and other harmful chemicals in the production process, and have a long service life, so they are a new type of green power source.

However, the unreasonable installation position of supercapacitors easily causes problems such as electrolyte leakage, which destroys the structural function of the capacitor. The application of supercapacitors is limited to DC circuits, because the internal resistance of supercapacitors is larger than that of aluminum electrolytic capacitors , which is not suitable for the operation requirements of AC circuits. From a physical point of view, supercapacitors have the characteristics of short charging time, long running time, good temperature control effect, and strong environmental protection functions.