JPS61260617A - Manufacture of aluminum electrolytic capacitor - 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] [Technical Field] The present invention relates to a method of manufacturing an aluminum electrolytic capacitor in which capacitance is increased by increasing the surface area of a dielectric formed on the surface of an anode foil. be.

[Background Art] Conventionally, in this type of aluminum electrolytic capacitor, in order to increase the surface area of the dielectric formed on the surface of the anode foil, the surface of the aluminum foil is etched to increase the surface area, and then anodized. Forming a dielectric is being practiced. However, there is a limit to the capacitance of simply increasing the surface area by etching aluminum foil.C1 Various methods have been studied to increase the capacitance of aluminum electrolytic capacitors. .

[Objective of the Invention 1] The present invention has been made in view of the above points, and provides a method for manufacturing an aluminum electrolytic capacitor in which capacitance is increased by forming C1 anode foil into a comb shape. The purpose is to provide

[Disclosure of the Invention] 1. In other words, the method for manufacturing an aluminum electrolytic capacitor of the present invention involves laminating an anode foil 3 having a dielectric 10 on its surface with a cathode foil 8 via an electrolyte 7, and forming this into a coil shape. In manufacturing an aluminum electrolytic capacitor, a pair of strip-shaped aluminum foils 1.1 are arranged horizontally with a gap between them.
A plurality of aluminum wires 6 are passed through one opening, and the aluminum wires 6 and aluminum foil 1 are connected, and then both aluminum wires 6 are connected to each other. f! + 1. Aluminum foil 1 was cut by cutting aluminum #16 along the longitudinal direction at 1 open.
A pair of comb-shaped aluminum foils 14 and 14 to which a plurality of aluminum wires 6 are bonded are formed, and then the surface of the comb-shaped aluminum foil 14 is anodized to produce an anode [3]. Is it aluminum? 11. A plurality of aluminum wires 6 are hung between the aluminum foil 1 and the wires 6 are passed and joined together, and the aluminum wires 6 are cut from the approximately medium-heated part, thereby forming a plurality of aluminum #i wires on the aluminum foil 1.
A comb-shaped aluminum v314 to which I6 is attached is produced, and then the comb-shaped aluminum foil 14 is etched and anodized to easily produce the anode foil 3 in which the surface area of the dielectric 10 is increased. ] The target has been achieved.

The present invention will be described in detail below based on examples. In manufacturing the anode foil 3, as shown in FIG. 1(a), the purity is 9.
A pair of belt-shaped aluminum foils 1 of 9.9・-99,99% are arranged in parallel with a gap between them, and both aluminum foils 1, 1
Between 99.9 and 99°99% purity aluminum #! 6
The two ends of the aluminum #i6 are joined to the aluminum foil 1 by ultrasonic bonding or the like. Here, it is preferable to use a thin wire or an extremely fine wire as the aluminum #i6. Then, the first
As shown in Figure (b), approximately the center of aluminum II & 6 between both aluminum foils 1 and 1 is
A comb-shaped aluminum foil 14. is cut along the longitudinal direction and a plurality of aluminum foils 4 & 6 are bonded to aluminum foil -3=1. ．． 14 are made in pairs on the left and right. Thereafter, the surface was etched in accordance with a conventional method, and then wound into a coiled shape, as shown in FIG. 1(d). A lead wire 9 made of 1 mm aluminum is connected with aluminum cream solder 13, and then anodized (formed).

Further, this anodization may be performed by anodizing the surface of the comb-shaped aluminum 14 in the unfolded state shown in FIG. 1(b), and then winding it up.

When anodized, each aluminum #! of comb-shaped aluminum 9i14! An oxide film of aluminum oxide is formed on the surface of 6 to form a dielectric 10. and,
As shown in FIG. 4, the anode foil 3 thus formed is laminated with a cathode trJ8 made of aluminum foil or the like via a separator paper 11 impregnated with an electrolyte 7, and this is wound into a coil. This constitutes a cylindrical aluminum electrolytic capacitor as shown in FIG. An aluminum lead wire 9 is attached to the aluminum foil 1 of the anode foil 3.
are connected with aluminum cream solder 13 or the like, and another lead wire 9 is led out from the cathode foil 8.

Therefore, by forming the anode foil 3 in a comb shape, the dielectric 10 is formed on the surface of each aluminum wire 6 of the anode foil 3, and the surface area of the dielectric 10 can be increased and the capacitor This can be solved by increasing the capacitance, and by freely changing the bonding interval of the aluminum wires 6 to change the number, or by changing the thickness, length, etc. of the aluminum wires 6. The surface area of the dielectric 10 can be freely changed, and thereby the capacitance of the aluminum electrolytic capacitor can be changed.

The present invention will be explained below by giving specific examples.

As the aluminum wire, aluminum ultrafine wire (wire diameter 50
±1 (μ) type H1001I 1 roll purity 99.99%
, Furukawa Special Metal Industry Co., Ltd.! The aluminum foil used was a 99.99% pure aluminum foil with a thickness of 0.3 nm and a thickness of 0.3 nm.

This aluminum [1 has a thickness of 311 μm as shown in FIG.
Aluminum #i
6 using an ultrasonic bond (manufactured by Ultrasonic 4-Gyo Co., Ltd.) -C
Bonding in a continuous manner. Here, aluminum#
The bonding position of i6 is 0 from the edge of aluminum foil 1.
．． 3+am (L, ) was to be bonded, and the bonding interval between adjacent aluminum and M6 was 500μ. Next, the aluminum wire 6 was cut from the center #11 to obtain a single elbow comb-shaped aluminum i14, and then the surface of this comb-shaped aluminum foil 14 (the surface of the aluminum wire in vf) was etched, as shown in FIG. As shown, the comb-shaped aluminum foil 14 was wound and twisted until 100 aluminum plates t*@6 were left. Next, apply half a cream to the side end of the rolled comb-shaped aluminum foil 14.
Lead #a9 was connected at step 11, and then anode foil 3 was produced by anodic oxidation.

Note that when anodizing the surface of the comb-shaped aluminum foil 14,
It goes without saying that the film may be etched in the unfolded state as shown in Fig. 3 and then anodized, or it may be rolled into a film and then etched and anodized. , or even if lead #i9 is anodized before soldering, or lead #! 9 may be anodized after soldering.

[Effects of the Invention] As described above, the present invention arranges a pair of strip-shaped aluminum foils in parallel, and connects the aluminum wires and the aluminum foils by passing a plurality of aluminum wires across both aluminum foils. Next, the aluminum wires on both sides of the aluminum foil are cut along the cutting method to form a single-arm comb-shaped aluminum foil in which multiple aluminum wires are bonded to the aluminum foil, and then the surface of the comb-shaped aluminum foil is cut. Since the anode foil was made by anodizing the aluminum foil, the anode foil was formed into a comb shape with multiple aluminum wires extending from the aluminum foil, and the dielectric material formed on the surface of the anode foil It is possible to increase the surface area of aluminum electrolytic capacitors and increase the electrostatic capacity of aluminum electrolytic capacitors.Also, by changing the thickness and number of aluminum wires, it is possible to change the electrostatic capacity of aluminum electrolytic capacitors with a simple configuration. There is an advantage that it can be done.

Moreover, such an aluminum electrolytic capacitor can be easily manufactured using strip-shaped aluminum foil and aluminum wire.

[Brief explanation of the drawing]

Figures 1 (a) to (d) are explanatory diagrams showing a method of manufacturing an anode foil according to an embodiment of the present invention, Figure 2 is an enlarged front view of the main parts of the same, and Figure 3 is a front view of the electrolytic capacitor of the same. , FIG. 4 is an explanatory view of the same as the above, FIG. 5 is a front view showing a specific manufacturing example of the anode foil of the above, and FIG. 6 is a perspective view of the same. 1 is an aluminum foil, 3 is an anode foil, 6 is an aluminum wire, 7 is an electrolyte, 8 is a cathode foil, 10 is a dielectric, and 14 is a comb-shaped aluminum foil. Agent Patent Attorney Ishi 1) Ai 7=8- Procedural amendment (voluntary) December 28, 1985

Claims (1)

[Claims] (1) In manufacturing an aluminum electrolytic capacitor, in which an anode foil with a dielectric on its surface is laminated with a cathode foil via an electrolyte, and this is wound into a coil, a pair of strip-shaped aluminum foils are separated with a gap between them. A plurality of aluminum wires are placed in parallel between both aluminum foils, and the aluminum wires and the aluminum foils are connected, and then the aluminum wires between both aluminum foils are cut along the longitudinal direction. A method for manufacturing an aluminum electrolytic capacitor, comprising forming a pair of comb-shaped aluminum foils with a plurality of aluminum wires bonded to the aluminum foil, and then anodizing the surface of the comb-shaped aluminum foils to produce an anode foil. .