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Method for forming extra high voltage anode foil

An ultra-high voltage, anode foil technology, applied in the direction of capacitor electrodes, capacitors, circuits, etc., can solve the problems of poor product leakage current performance, long time for foil-like boosting, etc., and achieve the effect of stable performance

Active Publication Date: 2013-06-26
新疆广投桂东电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to produce products that meet the needs according to the conventional forming method, mainly due to the long boosting time of the foil sample and the poor leakage current performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0018] In this embodiment, taking the formation of 750Vf products as an example, the method for forming the ultra-high voltage anode foil of the present invention is described in detail, including the following steps:

[0019] 1. Put the ultra-high pressure corrosion foil in the water vapor of 130 ℃ for 5 minutes;

[0020] 2. Place the steam-treated ultra-high pressure corrosion foil in a solution containing 0.2wt% diammonium hydrogen citrate at 60-80°C for 1 min;

[0021] 3. Place the ultra-high pressure corrosion foil treated with diammonium hydrogen citrate solution in the ultra-high pressure forming liquid at 90°C, and use 100mA / cm 2 Power up to 750V for 50 minutes to obtain the primary anode foil;

[0022] 4. Calcining the primary anode foil at 520°C for 3 minutes;

[0023] 5. Place the calcined primary anode foil in the ultra-high pressure forming liquid at 90°C, 2 Apply 750V for 30 minutes to obtain the secondary anode foil;

[0024] 6. Place the secondary anode foi...

Embodiment 2

[0028] In this embodiment, taking the formation of 850Vf products as an example, the method for forming the ultra-high voltage anode foil of the present invention is described in detail, including the following steps:

[0029] 1. Put the ultra-high pressure corrosion foil in the water vapor of 140 ℃ for 15 minutes;

[0030] 2. Place the steam-treated ultra-high pressure corrosion foil in a 0.5wt% diammonium hydrogen citrate solution at 70°C for 3 minutes;

[0031] 3. Place the ultra-high pressure corrosion foil treated with diammonium hydrogen citrate solution in the ultra-high pressure forming liquid at 90°C, and use 100mA / cm 2 Power up to 850V for 55 minutes to obtain the primary anode foil;

[0032] 4. Calcining the primary anode foil at 520°C for 3 minutes;

[0033] 5. Place the calcined primary anode foil in the ultra-high pressure forming liquid at 90°C, 2 Power up to 850V for 35 minutes to obtain the secondary anode foil;

[0034] 6. Place the secondary anode foil i...

Embodiment 3

[0038] In this embodiment, taking the formation of a 1000Vf product as an example, the method for forming an ultra-high voltage anode foil according to the present invention is described in detail, including the following steps:

[0039] 1. Put the ultra-high pressure corrosion foil in the water vapor of 150 ℃ for 20 minutes;

[0040] 2. Place the steam-treated ultra-high pressure corrosion foil in a solution containing 1.0wt% diammonium hydrogen citrate at 80°C for 5 minutes;

[0041] 3. Place the ultra-high pressure corrosion foil treated with diammonium hydrogen citrate solution in the ultra-high pressure forming liquid at 90°C, and use 100mA / cm 2 Power up to 1000V for 60 minutes to obtain the primary anode foil;

[0042] 4. Calcining the primary anode foil at 520°C for 3 minutes;

[0043] 5. Place the calcined primary anode foil in the ultra-high pressure forming liquid at 90°C, 2 Power up 1000V for 40min to obtain secondary anode foil;

[0044] 6. Place the secondary ...

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Abstract

Disclosed is a method for forming extra high voltage anode foil. Extra high voltage etched foil is placed in steam of 130-150 DEG C for 5-20 minutes, the extra high voltage etched foil is taken out and placed in a diammonium hydrogen citrate solution of 0.2-1.0wt% for 1-5 minutes, and the extra high voltage etched foil is taken out and subjected to sequent processing. By the aid of the method, the formed anode foil is stable in performance, the voltage rising time is less than 200 seconds, and the drain current of products is less than 25 mu A / cm2.

Description

[0001] technical field [0002] The invention relates to a method for forming an anode foil of an aluminum electrolytic capacitor, in particular to a method for forming an ultra-high voltage anode foil. Background technique [0003] With the widespread use of high-end household appliances and the rapid development of the electronics industry, the application of aluminum electrolytic capacitors is becoming more and more extensive, especially the demand for ultra-high voltage aluminum electrolytic capacitors is becoming more and more vigorous. The anode foil voltage requirements for the raw material used to manufacture ultra-high voltage aluminum electrolytic capacitors are also getting higher and higher. The current product voltage is only about 700V at the highest, while the voltage of ultra-high voltage aluminum electrolytic capacitors requires more than 750V. [0004] The current conventional forming method is: boiling the corroded foil in high temperature water, primary c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/055
Inventor 宋洪洲陆宝琳杨林桑
Owner 新疆广投桂东电子科技有限公司
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