​Aluminum capacitor is a kind of energy storage element, which is used in circuit for tuning, filtering, coupling, bypass, energy conversion and delay. Capacitors are usually called capacitors. According to its structure, it can be divided into fixed capacitor, semi variable capacitor and variable capacitor. It is a kind of universal electrolytic capacitor with good electrical performance, wide application range and high reliability made of aluminum. The products have 30 models and thousands of specifications, which are widely used in air conditioning, recorder, washing machine, communication machine and other household appliances and electronic complete machines, instruments and instruments.

It is made of aluminum cylinder as the negative pole, and the surface is equipped with liquid electrolyte, and a bent aluminum strip is inserted as the positive pole. The core is made of anode aluminum foil, electrolyte impregnated backing paper, cathode aluminum foil, natural oxide film and other overlapping winding. The core contains electrolyte and then sealed with aluminum shell and rubber cover to form an electrolytic capacitor. Generally, there is a plastic sleeve outside the aluminum shell of the aluminum electrolytic capacitor. The color of casing is colorful, which is not only beautiful, but also of special significance. Aluminum electrolytic capacitor is characterized by large capacity, but large leakage, large error and poor stability. It is often used as AC bypass and filter, and also used for signal coupling when the requirement is not high. The electrolytic capacitance has the positive and negative parts, and cannot be connected to the reverse when used.