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Sheet for capacitor electrodes, method and apparatus for manufacturing the same, and electrolytic acpacitors

A capacitor electrode and thin plate technology, which is applied in capacitor manufacturing, electrolytic capacitors, capacitor electrodes, etc., can solve the problems of insufficient capacitance and bending resistance, poor bending resistance, and low manufacturing efficiency

Inactive Publication Date: 2006-11-22
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Under these circumstances, the electrode foil manufactured by Japanese Unexamined Patent Publication H6-267803 has poor ductility and extremely poor bending resistance
Also, in the electrode foil manufactured according to this method, only a very thin porous film can be formed, resulting in insufficient capacitance and bending resistance.
In addition, since the foil is manufactured using an evaporation device, the manufacturing efficiency is very low
As will be understood from the above, in conventional manufacturing techniques, it is difficult to secure sufficient bending resistance while obtaining a large capacitance

Method used

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  • Sheet for capacitor electrodes, method and apparatus for manufacturing the same, and electrolytic acpacitors
  • Sheet for capacitor electrodes, method and apparatus for manufacturing the same, and electrolytic acpacitors
  • Sheet for capacitor electrodes, method and apparatus for manufacturing the same, and electrolytic acpacitors

Examples

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example

[0182] Next, examples of the present invention will be explained.

example 1

[0184] by adopting image 3 The production apparatus 9 shown produces capacitor electrode thin plates. Specifically, a molten alloy of a Zr—Al alloy (Al: 90 atomic %, Zr: 10 atomic %) is supplied to the molten alloy storage tank 10 . An aluminum foil core material 3 of aluminum foil (Si: 30ppm, Fe: 15ppm, Cu: 40ppm) with a thickness of 50 μm and a purity equal to or greater than 99.9% is transported downward in the box 18 through an inert gas atmosphere while atomizing the alloy (Zr- The spraying flow 15 of Al-based molten alloy) is sprayed downward through the spraying hole 22 of the molten alloy storage tank 10 . A generally horizontal stream 19 of inert gas from a gas flow generator 11 is injected into the spray stream 15 to create a spray stream 16 of atomized alloy. The spraying branch stream 16 is sprayed against the side of the aluminum foil core material 3 that is being conveyed downward. The incident angle α of the spraying branch flow is 90°. The core material 3 ...

example 17

[0199] by adopting Figure 5 The production apparatus 9 shown produces capacitor electrode thin plates. In detail, each of the two molten alloy storage tanks 10 and 10 is supplied with a molten alloy of a Zr—Al-based alloy (Al: 90 atomic %, Zr: 10 atomic %). The aluminum foil core material 3 with a thickness of 50 μm and a purity equal to or greater than 99.9% (Si: 30ppm, Fe: 15ppm, Cu: 40ppm) is conveyed downward in the box 18 through an inert gas atmosphere while atomizing the alloy (Zr-Al system The spray stream 15 of the molten alloy) is sprayed downward through the spray holes 22 of the respective molten alloy storage tanks 10 and 10. A generally horizontal stream 19 of inert gas from each gas flow generator 11 and 11 is injected into the spray stream 15 to produce a spray stream 16 of each atomized alloy. The two spraying sub-streams 16 are sprayed against both sides of the aluminum foil core material 3 being conveyed downward. The angle of incidence α of each sprayin...

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Abstract

A sheet for capacitor electrodes includes an aluminum core sheet 3 and a porous layer 4 formed on at least one surface of the core sheet 3. The porous layer 4 includes an intermetallic compound made of one or more valve metals selected from the group consisting of Ti, Zr, Nb, Hf and Ta, and Al. The porous layer is constituted such that particles of the intermetallic compound are fixed in solid solution in which the one or more valve metals are dissolved in Al. Atomized molten alloy including valve metal and Al is sprayed approximately downward, and an inert gas flow 19 is injected against the spray flow to generate a branched spray flow 16 of the atomized alloy from the spray flow 15. The branched spray flow 16 is jetted against a foil-like core material 3 and then rolled. According to the sheet for capacitor electrodes, larger capacitance can be obtained and the sheet is excellent in bent-resistant performance.

Description

[0001] Priority is claimed from Japanese Patent Application 2003-302965, filed August 27, 2003, and US Provisional Application 60 / 499,364, filed September 3, 2003, the entire disclosures of which are incorporated by reference. [0002] Cross References to Related Applications [0003] This application is based on an application filed under 35 U.S.C. §111(a) pursuant to 35 U.S.C. §119(e)(1), requiring provisional application 60 / 499,364 filed September 3, 2003 under 35 U.S.C. §111(b) priority. technical field [0004] The present invention relates to a capacitor electrode thin plate capable of obtaining large capacitance and excellent bending resistance, a method and device for manufacturing the thin plate, and an electrolytic capacitor. [0005] In this disclosure, the term "aluminum" means aluminum and its alloys. In addition, in the present disclosure, the symbol "Al" represents aluminum (pure metal). Background technique [0006] With the digitalization of electrical ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/06H01G9/00B32B15/01C22C21/00C23C4/02H01G9/04H01G9/045H01G9/055H01G13/00
Inventor 山之井智明川畑博之大泷笃史
Owner SHOWA DENKO KK