JPS60189213A - Electrolytic condenser - 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 The present invention relates to an electrolytic solution for an electrolytic capacitor, which is obtained by mixing resin powder with the electrolytic solution.

Conventional electrolytic capacitors separate the anode and cathode foils and hold the electrolyte by inserting a separator between the two pole strips to create a winding element, soaking the electrolyte together, and sealing it using an aluminum case and rubber. He had completed an electrolytic capacitor.

The separator used here is usually made from paper made from kraft pulp or manila hemp, etc. When a conventional electrolytic capacitor like this is mounted on a printed circuit board and incorporated into an audio amplifier chassis, etc., the sound pressure decreases. It may be shaken by vibration. Regarding sound pressure, the aluminum case of the electrolytic capacitor compresses and expands in response to sound pressure, and the pressure of the air inside the aluminum case also changes, which affects the tightness of the foil and separator. The resistances Re and Rt in the equivalent circuit diagram of the electrolytic capacitor shown in FIG. 1 are changed. Here, e is the resistance of the electrolytic solution, the resistance of the separator paper, and the interface resistance between the electrode plate and the electrolytic solution, and R and f are the film resistances. L is the inductance due to the winding structure of the capacitor and the extraction electrode, D is the polarity of the film, C+ is the capacitance of the anodic oxide film, and C- is the capacitance of the natural air oxide film of the cathode.

Regarding vibration, when an electrolytic capacitor is mounted on a printed circuit board, the amplifier chassis holding the printed circuit board may be shaken by sound pressure and vibration. Due to these causes, the printed circuit board vibrates, and the mounted electrolytic capacitor also vibrates as shown in Figure 2. In FIG. 2, (1) is the center of gravity of the printed circuit board (2) and the column (3) of the capacitor, and L is the distance between the printed circuit board and the center of gravity of the capacitor. Also, there are cases where only the printed circuit board vibrates without the electrolytic capacitor vibrating. In the case of falling down, connect the lead wire (4) to the tab terminal (
5) is applied to the joint with the foil (6), changing the way the electrolyte-impregnated separator is tightened and changing the resistance values Re and FLf in FIG. 1. In the case of conventional separators, due to this mechanism,
Sound pressure and vibration affect the electrical elements of an electrolytic capacitor and change the sound quality, but according to the present invention, the electrolyte
Particle distribution path for Noryl, polypropylene, phenol, etc. 0
．． 0.01 to 20 wt% of resin powder of 1 μm to 50 μm
By impregnating the mixed electrolyte, the separator sandwiched between the anode foil and the cathode foil is impregnated with resin powder.
This prevents the tightening method of the separator from changing due to the influence of water pressure and vibration, and also improves the interface between the foil and the electrolyte to prevent electrolyte flow, thereby increasing the resistance value R.
It has been found that it is effective in preventing fluctuations in e and Rf, minimizing the influence of external sound pressure and vibration, and preventing changes in sound quality.

Similarly, the resin powder of the present invention is not limited to the above-mentioned noryl, polypropylene, and phenol, but any resin powder that is chemically stable to the electrolytic solution may be used.

Example (1) The present invention was applied to an electrolytic capacitor of type 04 25V-10.
Regarding 00μF, the size is 16# in diameter and 31.5+mm in length, and when cut to a limited length, the anode foil,
An element prepared by rolling up the cathode foil and separator is impregnated with the electrolytic solution of the present invention and then removed. A lead wire (4) is passed through the elastic sealing body (force), and the element is integrated with the element and housed in an aluminum case (8), and the sealing body portion is caulked and sealed.After that, a voltage is applied and aging is completed to complete the product.

In this measurement, the capacitor (0) is vibrated at 5 Hz to 5 KH2 with an output of 0.5 G using an external vibrator using the circuit shown in FIG. 5, and the noise of the capacitor is measured. In C, the test capacitor SG is an oscillator, the capacitor SG is a resistor, and A is a spectrum analyzer.

[Brief explanation of the drawing]

Fig. 1 is an equivalent circuit diagram of an electrolytic capacitor, Fig. 2 is a state diagram of the electrolytic capacitor in vibration, Fig. 3 is a structural diagram of the electrolytic capacitor, and Fig. 4 is a vibration measuring circuit of the electrolytic capacitor. Leather 1 Helmet 4 Figure

Claims (1)

[Scope of Claims] (1) An electrolytic capacitor comprising a separator for separating the anode foil and cathode foil of the electrolytic capacitor and for preserving the electrolyte, the electrolytic capacitor containing resin powder in the electrolyte. 2. The electrolytic capacitor according to claim 1, wherein the type of resin powder is a powder made of at least one of noryl, polypropylene, phenol, etc. (3) The content ratio of the resin to the electrolyte is 0.1
~20 wt% in claim 1 or 2.
Electrolytic condensate as described in section. (4) The particle size distribution of the resin powder is approximately 0.1 μm to 50 μm.
The electrolytic capacitor according to claim 1 or 2, wherein the electrolytic capacitor is m.