JPS605574Y2 - Wound electrolytic capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrolytic capacitor with an improved terminal connection structure.

As shown in FIGS. 1 and 2, conventional wound electrolytic capacitors have an anode electrode foil and a cathode electrode foil wound through electrolytic paper, and the internal terminal 1 is connected to the electrode foil by caulking, welding, etc.
, 1 are connected to form a capacitor element 2, which is impregnated with an electrolytic solution.

Next, the external terminals 3, 3 previously embedded in the sealing body 4, such as a resin, and the internal terminals 1, 1 are connected by caulking, welding, etc., and the capacitor element 2 is housed in the container.

Reference numeral 5 designates an upper welding electrode for connecting the internal terminals 1, 1 and external terminals 3, 3, respectively, and 6 designates a lower welding electrode.

Since the connection portions of the internal electrodes 1, 1 with the electrode foils of the wound electrolytic capacitor configured as described above are formed in a flat shape, the internal terminals 1, 1 led out from the capacitor element 2 are as shown in FIG. As shown in FIG. 2, the flat surfaces 1a face each other.

For this reason, when welding the external terminal 3.3 and the internal terminals 1, 1, it is difficult to weld between the two locations at the same time.
This method has drawbacks such as the need to weld one side of the internal terminal 1 and the other, which takes a lot of man-hours and is difficult to automate.

The present invention eliminates the above-mentioned drawbacks and is a wound type electrolytic capacitor that can be easily automatically welded without increasing the number of parts.

Hereinafter, the present invention will be described with reference to embodiments shown in FIGS. 3 to 8.

3 and 4 show the welding process of internal terminals 8, 8 led out from the capacitor element 7 and external terminals 9, 9 fixed to or penetrating the sealing body 10, 11 is an upper electrode for welding;
12 is a lower electrode for welding.

In this case, the internal terminals 8, 8 are twisted at a predetermined angle at the roots led out from the capacitor element 7, and the external terminal 9 and the internal terminal 8 are The connecting surfaces (B-B' planes) are different from each other.

That is, the flat connecting portions of the internal terminals 8, 8 connected to the external terminals 9, 9 are twisted so as to be in the same direction.

The internal terminal 8 may be bent either before or after the capacitor element is wound.

Therefore, since the connecting surfaces of the internal terminals 8, 8 and the external terminals 9, 9 are configured to be in the same direction, it is easy to weld two places at the same time, and it is possible to weld two or more internal terminals and external terminals. Objects can also be welded in the same way.

In this case, the cross section of the welded portion of the external terminal 9 may be flat or round.

This shortens the assembly work time, facilitates automation, and is particularly effective for products with narrow terminal spacing and products with a large number of terminals.

5, 6, and 7 show other embodiments of the internal lead terminal, in which the surface 8b connected to the electrode foil is at right angles to the surface 8a or at a predetermined angle when connected to the external terminal 9. Since the flat connecting portion of the internal terminal 8 connected to the external terminal 9 is in the same direction as described above, the external terminal 9 and the internal terminal 8 can be welded together as shown in FIG. There is an effect that can be made in the direction of the arrow.

13 is a container for a capacitor.

As mentioned above, the wound type electrolytic capacitor of the present invention connects the external terminal fixed to or penetrating the sealing body and the internal terminal led out from the capacitor element. The flat connecting portion of the internal terminal connected to the internal terminal is twisted at a predetermined angle and formed in the same direction, which is extremely advantageous in terms of mass production efficiency and has great practical value.

[Brief explanation of drawings]

Figure 1 is a plan view of a conventional electrolytic capacitor element, Figure 2 is an explanatory diagram of a conventional electrolytic capacitor in the middle of assembly, Figures 3 to 8 are examples of the present invention, and Figure 3 is an illustration of an electrolytic capacitor. FIG. 4 is an explanatory view of the electrolytic capacitor being assembled, FIGS. 5 to 7 are perspective views of internal terminals of the electrolytic capacitor, and FIG. 8 is a sectional view of the electrolytic capacitor. 7...Capacitor element, 8...Internal terminal, 8a, 8b...Flat connection surface, 9...
・External terminal, 10... Sealing body, 13...
·container.

Claims (1)

[Scope of utility model registration request] An electrolytic capacitor formed by winding a pair of electrode foils with a separator in between to form a capacitor element, connecting an internal terminal led out from the capacitor element to an external terminal fixed to or penetrating the sealing body, and storing it in a container. A wound type electrolytic capacitor characterized in that an internal terminal is twisted at a predetermined angle so that a flat connection portion with an external terminal is in the same direction as the insertion surface into the capacitor element.