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Aluminium Electrolytic Capacitors: Wound, Soaked and Sealed
An aluminium electrolytic capacitor is two aluminium foils wound up with a paper spacer between them. The anode foil is etched rough to multiply its surface and then "formed": a voltage in an electrolytic bath grows an insulating oxide layer whose thickness follows the forming voltage, and that oxide is the dielectric. The liquid electrolyte soaked into the paper, commonly ethylene glycol with boric acid, is the real cathode; the second foil only connects to it. The foils and paper are cut to width, wound with their terminals welded on, soaked with electrolyte under vacuum, put in an aluminium can, sealed with a rubber disc by curling the can's edge, sleeved, and finally run at rated voltage in heat to heal any oxide damaged by cutting and winding.
高级
Factory process
说明
1
1
Cut the foils and paper
Cut the foils and paper
Cut the etched and formed anode foil, the spacer paper and the cathode foil from their mother rolls to width.
此步骤所需材料：
腐蚀化成阳极箔1 as required
铝箔1 as required
电容器隔离纸1 as required2
2
Wind
Wind
Weld on the terminals, wind the foils with the paper between them, and cut the winding to length.
所需工具：
电容器卷绕机3
3
Impregnate
Impregnate
Soak the winding with electrolyte under vacuum.
此步骤所需材料：
乙二醇1 as required
硼酸1 as required所需工具：
真空浸渍室4
4
Case and seal
Case and seal
Put the winding in the aluminium can, fit the rubber sealing disc and curl the can's edge to seal it; add the insulating sleeve.
此步骤所需材料：
铝电容器外壳1 个
橡胶密封塞1 个
热缩管1 个5
5
Post-form and test
Post-form and test
Apply rated voltage at high temperature to heal the oxide, then measure capacitance, leakage current and impedance.
所需工具：
高温老化化成架材料
8- 1 as required占位符
- 1 as required占位符
- 1 as required占位符
- 1 as required占位符
- 1 as required占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
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