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Capacitor core cladding, preparation method thereof and solid aluminum electrolytic capacitor

A capacitor and core package technology, applied in the field of solid aluminum electrolytic capacitors, can solve the problems of reducing energy consumption and complex manufacturing process, and achieve the effects of low loss rate, simple operation and energy saving

Active Publication Date: 2017-08-25
深圳市金富康电子有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation method not only has a complicated process, but generally requires a higher temperature, usually above 200°C, which is not conducive to reducing energy consumption.

Method used

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  • Capacitor core cladding, preparation method thereof and solid aluminum electrolytic capacitor
  • Capacitor core cladding, preparation method thereof and solid aluminum electrolytic capacitor

Examples

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preparation example Construction

[0028] The invention provides a method for preparing a capacitor core pack, comprising the following steps:

[0029] (1) A non-woven fabric is arranged between the anodized aluminum foil and the cathode aluminum foil, and is wound into a core pack;

[0030] (2) Carrying out the repair treatment of the positive electrode oxide film by putting the core bag in the chemical forming solution to obtain the chemical forming core bag;

[0031] (3) The chemical-forming core is soaked in a polyvinyl alcohol solution to obtain a primary impregnated core bag;

[0032] (4) The first-level impregnated core obtained in step (3) contains the impregnated monomer and the oxidizing agent to obtain a second-level impregnated core bag;

[0033] (5) The secondary impregnated core package obtained in step (4) is subjected to primary polymerization, secondary polymerization and tertiary polymerization in sequence to obtain a capacitor core package.

[0034] In the present invention, a non-woven fab...

Embodiment 1

[0053] The anodized aluminum foil, cathode foil and 1 layer of PET non-woven fabric are rolled into a capacitor core package through the nail coiler, which is a special production equipment for aluminum electrolytic capacitors. The non-woven fabric is interposed between the anodized aluminum foil and the cathode foil. When the core is wrapped, the non-woven fabric is used as the core, the length of the cathode foil is greater than the length of the anodized aluminum foil, and the length of the non-woven fabric is longer than the length of the overlapping part of the anodized aluminum foil and the cathode aluminum foil.

[0054] Put the wound core pack into 3wt% ammonium adipate aqueous solution, apply a direct current voltage of 2A, and the temperature of the forming solution is 45°C for 1 hour.

[0055] Wash the formed core bag with pure water for 20 minutes, then dry it, and impregnate the PVA aqueous solution with a mass concentration of 0.2% for 20 minutes.

[0056] The dr...

Embodiment 2

[0061] The anodized aluminum foil, cathode foil and 2-layer PET non-woven fabric are rolled into a capacitor core package through the nail coiler, which is a special production equipment for aluminum electrolytic capacitors. The non-woven fabric is interposed between the anodized aluminum foil and the cathode foil. When the core is wrapped, the non-woven fabric is used as the core, the length of the cathode foil is greater than the length of the anodized aluminum foil, and the length of the non-woven fabric is longer than the length of the overlapping part of the anodized aluminum foil and the cathode aluminum foil.

[0062] Put the wound core pack into 3wt% ammonium dihydrogen phosphate aqueous solution, apply a DC voltage and current of 2A, and form the solution at a temperature of 45°C for 1 hour.

[0063] Wash the formed core bag with pure water for 20 minutes, then dry it, and impregnate the PVA aqueous solution with a mass concentration of 3% for 20 minutes.

[0064] The...

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Abstract

The invention provides a capacitor core cladding, a preparation method thereof and a solid aluminum electrolytic capacitor. The preparation method of the capacitor core cladding provided by the invention is simple to operate, high-temperature carbonization is not required to be performed, and the energy is saved. In addition, the capacitor acquired according to the invention has the characteristics of high capacitance, low loss rate and low ESR value. According to the result of an embodiment, the capacitance of the capacitor acquired in the embodiment is 205-220UF which is far higher than the capacitance 138-152UF of a comparison sample; the loss rate of the acquired capacitor is only 1.3-1.9% which is far lower than the loss rate 4.2-4.6% of the comparison sample; the ESR value of the acquired capacitor is 25-35 milliohms which his far lower than the ESR value 36-40 milliohms of the comparison sample; and the leakage current per minute is 15-30UA.

Description

technical field [0001] The invention relates to the technical field of solid capacitors, in particular to a capacitor core pack, a preparation method thereof, and a solid aluminum electrolytic capacitor. Background technique [0002] A solid aluminum electrolytic capacitor is a capacitor that uses a solid conductive polymer as a capacitor dielectric material. Solid aluminum electrolytic capacitors are widely used due to their more stable electrical properties than liquid aluminum electrolytic capacitors, lower equivalent series resistance (ESR), higher resistance to ripple current, higher temperature resistance, and longer life. [0003] The method for manufacturing solid aluminum electrolytic capacitors in the prior art mainly uses electrolytic paper as a diaphragm, and then performs high-temperature carbonization treatment on the core package. However, this preparation method not only has a complicated process, but generally requires a relatively high temperature, usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/15
CPCH01G9/151
Inventor 王兴久
Owner 深圳市金富康电子有限公司
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