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Laminated electrolytic capacitor and manufacturing method thereof

A technology of electrolytic capacitors and aluminum electrolytic capacitors, which is applied in the field of capacitors, can solve the problems of increased heat generation of capacitors, the inability to completely eliminate pinholes in electrolytic paper, and shortened lifespan, and achieve the goals of improving loss and heat generation, increasing capacity extraction rate, and prolonging service life Effect

Active Publication Date: 2020-09-01
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 comprises the following steps of providing a modified or unmodified bi-pass porous alumina template electrolytic paper; slitting; piercing and riveting; laminating; optionally demoulding; impregnating and packaging. According to the present invention, a bi-pass porous alumina template replaces a traditional electrolytic paper to be applied to the aluminum electrolytic capacitor, so that the problem of perforation of the electrolytic paper in the aluminum electrolyticcapacitor is avoided; meanwhile, the liquid content of an adsorption electrolyte is increased, so that the capacity extraction rate is increased, the loss and heating of the aluminum electrolytic capacitor are improved, and the service life of the aluminum electrolytic capacitor is prolonged.

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 Applications(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
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