Core package, aluminum electrolytic capacitor and packaging method thereof

A core package, comprising:

• a plurality of first electrode foils and a plurality of second electrode foils laminated one on another, wherein every two adjacent first electrode foils are spaced by one of the plurality of second electrode foils, every two adjacent second electrode foils are spaced by one of the plurality of first electrode foils, the first electrode foil and the second electrode foil adjacent to each other are spaced by an electrolytic paper;
• and each of the first electrode foils is either of an anode foil and a cathode foil, and each of the second electrode foils is the other of the anode foil and the cathode foil;
• wherein among the plurality of first electrode foils, a first conductive foil is arranged at an edge of each of the first electrode foils, a first portion of the first conductive foil is electrically coupled to the corresponding first electrode foil, and a second portion of the first conductive foil extends and protrudes relative to the corresponding first electrode foil;
• and a plurality of first conductive foils are connected to one first conductive foil strip through the second portions;
• and
• wherein an oxide film is formed on a surface of the first conductive foil;
• wherein each of the first electrode foils comprises a main body portion and an electrode tab portion formed integrally, the electrode tab portion protrudes relative to an edge of the main body portion, and the first portion of the first conductive foil is connected to the first electrode foil through the electrode tab portion;
• and
• wherein the electrode tab portions of the plurality of first electrode foils are staggered in sequence along a first direction.