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Laminated electrolytic capacitor and manufacturing method thereof

The technology of an electrolytic capacitor and its manufacturing method, which is applied in the field of capacitors, can solve problems such as increased heat generation of capacitors, inability to completely eliminate pinholes in electrolytic paper, and increased thickness of electrolytic paper, so as to improve loss and heat generation, increase capacity extraction rate, and avoid perforation problems Effect

Active Publication Date: 2022-03-04
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method will lead to an increase in the thickness of the electrolytic paper, which will not only increase the size of the manufactured capacitor, but also increase the loss and ESR of the capacitor, which will increase the heat generation of the capacitor during use and shorten the life; and this method cannot completely eliminate the pinholes in the electrolytic paper. , the capacitors produced still have potential safety hazards

Method used

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  • Laminated electrolytic capacitor and manufacturing method thereof
  • Laminated electrolytic capacitor and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0060] In this embodiment, the manufacturing process of laminated aluminum electrolytic capacitors, such as figure 1 shown, including:

[0061] (1) Provide double-pass porous alumina template electrolytic paper with a thickness of 40 μm and a pore size of 100 nm;

[0062] (2) Slitting: cutting the anode foil, cathode foil, and double-pass AAO template electrolytic paper into specified sizes;

[0063] (3) Riveting: piercing and riveting the anode foil and cathode foil;

[0064] (4) Lamination: Laminate sequentially according to cathode foil-double-pass porous alumina template electrolytic paper-anode foil-double-pass porous alumina template electrolytic paper-cathode foil;

[0065] (5) Impregnation and encapsulation: The laminated cores are impregnated with an electrolyte solution, and then encapsulated in an aluminum shell to obtain a laminated aluminum electrolytic capacitor.

Embodiment 2

[0067] In this embodiment, the manufacturing process of laminated aluminum electrolytic capacitors, such as figure 2 shown, including:

[0068] (1) Dissolve methyl methacrylate in acetone to prepare a solution with a mass fraction of 0.5%; immerse a double-pass AAO template with a thickness of 40 μm and a pore size of 100 nm in the acetone solution of methyl methacrylate above, at 40 ° C Immersed for 3 minutes, and then treated at 150°C for 20 minutes to obtain a modified double-pass AAO template electrolytic paper;

[0069] (2) Slitting: cutting the anode foil, cathode foil and the modified double-pass AAO template electrolytic paper into specified sizes;

[0070] (3) Riveting: piercing and riveting the anode foil and cathode foil;

[0071] (4) Lamination: Laminate sequentially according to cathode foil-modified double-pass AAO template electrolytic paper-anode foil-modified double-pass AAO template electrolytic paper-cathode foil;

[0072] (5) Demolding: Wrap the laminat...

Embodiment 3

[0075] In this embodiment, the manufacturing process of laminated aluminum electrolytic capacitors, such as figure 2 shown, including:

[0076] (1) Ethyl methacrylate was dissolved in ethanol to prepare a solution with a mass fraction of 1%; the double-pass AAO template with a thickness of 20 μm and a pore size of 60 nm was immersed in the ethanol solution of ethyl methacrylate above, at 20 ° C Immersed for 2 minutes, and then treated at 120°C for 30 minutes to obtain a modified double-pass AAO template electrolytic paper;

[0077] (2) Slitting: cutting the anode foil, cathode foil and the modified double-pass AAO template electrolytic paper into specified sizes;

[0078] (3) Riveting: piercing and riveting the anode foil and cathode foil;

[0079] (4) Lamination: Laminate sequentially according to cathode foil-modified double-pass AAO template electrolytic paper-anode foil-modified double-pass AAO template electrolytic paper-cathode foil;

[0080] (5) Demolding: Wrap the ...

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Abstract

The invention provides a laminated aluminum electrolytic capacitor and a manufacturing method thereof. The manufacturing method includes: providing modified or unmodified double-pass porous aluminum oxide template electrolytic paper; cutting; rivet riveting; lamination; optional demoulding; impregnation and packaging. The present invention uses a double-pass porous alumina template to replace traditional electrolytic paper in aluminum electrolytic capacitors, avoiding the occurrence of electrolytic paper perforation in aluminum electrolytic capacitors, and at the same time increasing the amount of liquid contained in the adsorbed electrolyte, increasing the capacity extraction rate, and improving The loss and heat generation of aluminum electrolytic capacitors prolong the service life.

Description

technical field [0001] The invention belongs to capacitor technology, and in particular relates to a method for manufacturing a laminated aluminum electrolytic capacitor and a capacitor manufactured by the method. Background technique [0002] An aluminum electrolytic capacitor is composed of an anode foil, a cathode foil, electrolytic paper, an electrolyte, a lead-out strip, and a packaging case, wherein the electrolytic paper is used between the anode and the cathode of the aluminum electrolytic capacitor, on the one hand, it acts as a barrier between the anode and the cathode. Function; on the other hand, electrolytic paper absorbs and stores electrolyte, and improves the capacity extraction rate and high temperature resistance of aluminum electrolytic capacitors. The requirements for paper for aluminum electrolytic capacitors are different from ordinary paper. The requirements for paper are high purity, uniform thickness and tightness, uniform fiber arrangement, and abil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 余英凤邓利松何凤荣
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD