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Definition and composition of aluminum electrolytic capacitors

HITS:77     DATE:2020-09-19 17:10:34    

1. Definition of Aluminum Electrolytic Capacitors Aluminum electrolytic capacitors are power capacitors with positive and negative levels. The basic structure of aluminum electrolytic capacitors is composed of a layer of anodic aluminum oxide platinum, a layer of cathode aluminum foil and a layer immersed in the middle seam. The gasket paper of the lithium battery electrolyte and its pure natural air oxide film are made by a superposition rewinding machine. After the lithium battery electrolyte is soaked in the lithium battery electrolyte, the power capacitor is sealed with an aluminum shell and a plastic cover. Second, the composition of aluminum electrolytic capacitors The raw materials that constitute aluminum electrolytic capacitors are: electrolytic paper, lithium battery electrolyte, anodized aluminum oxide platinum, cathode aluminum foil, rubber cover, rubber hose, guide pin and aluminum shell. The core of the aluminum electrolytic capacitor is produced by stacking anodized aluminum oxide platinum, electrolytic paper, cathode aluminum foil, and electrolytic paper in the order of the inside and outside, and the rewinding machine is made into a cylindrical shape. 3. Failure mode Basic elements: Invalidity: refers to the loss of the function required by the original design office of the parts. Invalidation principle: physics, organic chemistry or other reasons and the whole process that cause invalidity. Such as load, erosion, etc. nn failure modes: invalid methods, such as lead, short circuit failure, power failure, etc. Fourth, service life calculation From the perspective of invalidation principle, the application standard has great harm to the service life of aluminum electrolytic capacitors. Application standards can be divided into natural environmental standards and electrical standards. The natural environmental standards include temperature, environmental humidity, standard air pressure, vibration, etc., among which temperature is more harmful to service life. Electricity standards include working voltage, harmonic distortion current, and battery charging standards. 1. Ambient temperature and service life The harm of surrounding temperature to service life is reflected in the decrease in capacity and the expansion of the tangent of the loss angle. The reason for this situation is that the electrolyte of the lithium battery gradually diffuses from the sealed part to the outside. The correlation between the time transition of electrical performance and the ambient temperature can be obtained as follows...
 

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