JPS6038808A - Form of inner surface etching case of cathode aluminum of small-sized aluminum electrolytic condenser and method of producing same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Generally, when manufacturing a small aluminum electrolytic capacitor, an electrolytic electrolytic capacitor having a structure in which an anode aluminum etched chemical foil and a cathode aluminum etched foil are wound up with an insulating paper in between, an electrolyte is injected into the case, and the case is sealed. Most of them are capacitors. It is believed that no electrolytic capacitor has been produced to date that uses the cathode aluminum inner surface etched case of the present invention and has an anode aluminum etched chemical round bar structure in which electrolyte is injected and sealed through insulating paper. This proves that the case of the present invention could not be produced.

The difference in cathode capacity between this case and the non-etched case is 50
The cathode capacity of the internally etched case can be adjusted when etching the plate material.

Next, for reference, we will compare the cathode capacitance values of the cathode-free aluminum case and the aluminum inner-etched case of the present invention.

A 3φm/m×5m/mL Unetched aluminum case capacity 0.55μF~0.6μFB 3φm/m×5m
/mL Invention case Capacity 3.75μF ~ 39.8μ
F anode opposing area cathode capacitance value A 0.22 μF B 15 μF Now, if the composite capacitance value with the anode 1 μF aluminum etched chemical round rod is used for B, characteristic problems will occur by using the case of the present invention as the cathode. do not. Taking these things into consideration, the aluminum internal etching case manufactured with the shape of the present invention is extremely effective, and up to now, electrolytic capacitors of this shape have not been commercialized, and it is possible to make it more miniaturized than ever before. It is. Also, 3φm/m and 4φm have relatively poor yield.
This is an epoch-making invention that can improve productivity by 1/m and contribute to the miniaturization of aluminum electrolytic capacitors.

4 Brief explanation of drawings Actual size x 10 Figure 1 Cross-sectional view of cathode aluminum inner surface etched case Figure 2 Cross-sectional view of electrolytic capacitor Figure 3 Anode aluminum etched chemical round rod 1 Aluminum inner surface etched case 2 Inner surface etched part 3 Welded part 4
Aluminum tab, lead wire welding parts 5 Tin plating CW wire (cathode) 6 Anode tin plating CW wire 7 Anode aluminum etching Chemical round rod and welded part 6 8 Curl sealing part 9 Insulating paper and electrolyte 10 Anode aluminum etching Chemical round rod etching part 11
Insulating paper 12 Space part 13 Rubber packing 14 Same as anode 10 15 Anode lead Sparrow CW wire Yoshikazu Okamoto

Claims (1)

[Scope of Patent Claims] When manufacturing an etched aluminum case on the inside surface as a cathode for a small aluminum electrolytic capacitor, it is extremely difficult to etch only the inside surface of a normally manufactured aluminum case. The present invention focuses on this point and provides a method of manufacturing a case using an eyelet manufacturing method after processing an aluminum case plate material by a known etching method on one or both sides, and this form.