Aluminium electrolytic capacitor dry type negative electrode foil making method
A technology for aluminum electrolytic capacitors and manufacturing methods, which is applied in capacitor manufacturing, electrolytic capacitors, capacitors, etc., can solve the problems of unstable surface characteristics and inability to meet the requirements of aluminum electrolytic capacitor electrodes, and achieves improvement of electrostatic capacity and surface electron conduction rate. , the effect of improving stability
Inactive Publication Date: 2004-02-25
立敦科技股份有限公司
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Problems solved by technology
It is a dry physical method using physical vapor deposition of aluminum foil electrodes, and its steps are as follows: (a) pretreatment is to use oxidizing acid aqueous solution to remove pollutants on the surface of the original aluminum foil; (b) physical vapor deposition is to deposit a layer of metal film , to increase the surface area to produce dry-type aluminum foil electrode products; however, the above-mentioned physical vapor deposition aluminum foil electrode method is mainly based on the conditions of electrode thickness and characteristics, so it is more suitable for use as negative electrode materials for batteries, not suitable for Aluminum electrolytic capacitors; and their surface characteristics are still unstable in the atmosphere, so that they cannot meet the electrode requirements of aluminum electrolytic capacitors
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[0027] Such as image 3 As shown, the aluminum electrolytic capacitor includes a capacitor element 1 housed in a case 3 , a lead wire 2 connected to the capacitor element 1 , and a sealing member 4 that seals the opening of the case 3 . The capacitor element 1 is formed by rewinding a positive electrode foil and a negative electrode foil with a separator interposed therebetween; the lead wire 2 includes a pair of lead wires 2 connected to respective ends of the anode foil and the cathode foil, the pair of lead wires 2 pass through the through holes of the sealing element 4 and are pulled out from the outside of the box body 3; the material of the negative electrode foil in the aluminum electrolytic capacitor is usually electrolyte, but the function of the negative electrode foil of the aluminum electrolytic capacitor is mainly responsible for conducting electrons, wherein:
[0028] 1 / CT=1 / C+ + 1 / C-
[0029] CT: total capacitance of aluminum electrolytic capacitor;
[0030] C...
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Abstract
The present invention relates to a preparation method of dry negative foil of aluminium electrolytic capacitor. It utilizes the method for making dry negative foil by adopting the process of physicalgas deposition to continuously deposit proper conductive layer on the surface of aluminium foil material so as to obtain high-efficiency electronic conducting action and obtain stable surface property.
Description
technical field [0001] The invention relates to a method for manufacturing negative electrode foil of an aluminum electrolytic capacitor, in particular to a method for manufacturing a dry type negative electrode foil of an aluminum electrolytic capacitor. Background technique [0002] Low-impedance aluminum electrolytic capacitor products are a major mainstream in the use of electrical equipment at present and in the future. At present, this product is limited by the lack of inherent stability of wet electrochemical corrosion foil and the selection of materials. It is impossible to break through, and its quality has reached the bottleneck. [0003] Furthermore, if figure 1 As shown, the conventional manufacturing method of aluminum electrolytic capacitor cathode foil is such as Taiwan Publication No. 403923 patent case (hereinafter referred to as the cited case), which mainly adopts the etching method and includes the following steps; (a) pretreatment is to use oxidizing ac...
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IPC IPC(8): H01G9/045H01G9/055
Inventor 柯村忺刘文贵
Owner 立敦科技股份有限公司