350V electrolytic capacitor and production process thereof
A technology of electrolytic capacitors and electrolytic paper, which is applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve the problems of short load life, etc., and achieve the effects of prolonging life, increasing overall volume, and improving temperature resistance
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Embodiment 1
[0050] Take cathode foil and anode foil: electrocorrode cathode foil and anode foil, oxidize cathode foil and anode foil after electrocorrosion, and form an oxide film on the surface of cathode foil and anode foil; cut cathode foil, anode foil and insulating electrolytic paper, respectively The lead wire is connected with the cathode foil and the anode foil to form the negative electrode lead and the positive electrode lead, and the insulating electrolytic paper, the cathode foil and the anode foil are wound; the electrolyte is added, and the electrolyte is impregnated on the insulating electrolytic paper; the final assembly and crimping are carried out , charging, aging test and parameter detection.
[0051] In this embodiment, the composition of the electrolyte includes: 40% ethylene glycol, 40% benzyl alcohol, 10% gamma-hydroxybutyrolactone, 1% branched chain polycarboxylic acid ammonium salt, 8.1% azelaic acid EG solution %, o-nitroanisole 0.6%, benzene 0.1%, phosphotungst...
Embodiment 2
[0055] This example is basically the same as Example 1, the difference is that in this example, the composition of the electrolyte includes: ethylene glycol 68.8%, benzyl alcohol 10%, γ-hydroxybutyrolactone 10%, branched Ammonium polycarboxylate 8.9%, azelaic acid EG liquid 1%, o-nitroanisole 0.1%, benzene 1%, phosphotungstic acid 0.1%, molybdic acid 0.1%.
[0056] In this embodiment, the voltage of the cathode foil is 5V, the capacity of the electrolytic capacitor is 8.2 μF, the diameter of the bottom surface of the housing is 13 mm, and the height is 21 mm.
Embodiment 3
[0058] This example is basically the same as Example 1, the difference is that in this example, the composition of the electrolyte includes: ethylene glycol 49.6%, benzyl alcohol 20%, γ-hydroxybutyrolactone 20%, branched chain Ammonium polycarboxylate 7.9%, azelaic acid EG liquid 1%, o-nitroanisole 0.1%, benzene 0.5%, phosphotungstic acid 0.5%, molybdic acid 0.4%.
[0059] In this embodiment, the voltage of the cathode foil is 3V, the capacity of the electrolytic capacitor is 10 μF, the diameter of the bottom surface of the housing is 13 mm, and the height is 21 mm.
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