A supercapacitor is a new type of component that stores energy through a two-layer interface formed between an electrode and an electrolyte. When the electrode is in contact with the electrolyte, due to the effects of Coulomb force, intermolecular force and interatomic force, the solid-liquid interface exhibits a stable double-layer charge with opposite sign, which is called an interface double layer.
Today, supercapacitor manufacturers take you to understand the main parameters of the capacitor:
1. Voltage: The supercapacitor has a recommended voltage and an optimal working voltage. If the used voltage is higher than the recommended voltage, the life of the capacitor will be shortened, but the capacitor can work continuously for a long time under the high voltage state, and the activated carbon inside the capacitor will decompose to form a gas. It is advantageous to store electrical energy, but it can't exceed 1.3 times of the recommended voltage, otherwise the supercapacitor will be damaged due to the high voltage.
2, charging: Capacitor charging has a variety of ways, such as constant current charging, constant voltage charging, pulse charging and so on. During the charging process, connecting a resistor in the capacitor circuit will reduce the charging current and improve the battery life.
3. Temperature: The normal operating temperature of the supercapacitor is -40~70 °C. Temperature and voltage are important factors influencing the life of supercapacitors. For every 5 °C increase in temperature, the life of the capacitor will drop by 10%. At low temperatures, increasing the operating voltage of the capacitor, the internal resistance of the capacitor does not rise, and the efficiency of use of the capacitor can be improved.
4. Discharge: In the pulse charging technology, the internal resistance of the capacitor is an important factor; in the small current discharge, the capacity is an important factor.
5, life: the internal resistance of the supercapacitor increases, then the capacity reduction j is within the specified parameters, its effective use time can be extended, generally related to its characteristics as specified in Article 4. The impact on life is active dryness, increased internal resistance, and the ability to store electrical energy drops to 63.2%.