In terms of production, aluminum electrolytic capacitors occupy the second place in the capacitors. This kind of capacitor was originally a kind of DC capacitor, but now it has developed from DC to AC, from low temperature to high temperature, from low voltage to high voltage, from general type to special type, from general structure to chip type and flat. Book structure The upper limit capacity has been extended to about 4 f, the operating frequency has reached 30 kHz, the working temperature range has reached -55 ℃ -125 ℃, some h***e reached 150 ℃, and the rated voltage has reached 700 v. In short, aluminum electrolytic capacitors are developing more and more widely. The basis for these developments is as follows: electrolytic capacitors on materials