Folded film capacitor and manufacturing method thereof

Abstract

The invention provides a folded film capacitor and a manufacturing method. The folded film capacitor comprises a metallized film, two gold-sprayed layers (4a, 4b), and two electrodes respectively connected to the two gold-sprayed layers (4a, 4b) The terminal and the housing are characterized in that the metallized film includes a first metal vapor-deposition film (2a), a second metal vapor-deposition film (2b) and an electrical insulating film sandwiched between the two metal vapor-deposition films (2a, 2b) The polymer base layer (1), the metallized film is repeatedly folded in the longitudinal direction to form a cuboid-shaped block, and the folded corners of the first metal vapor-deposited film (2a) and the second metal vapor-deposited film (2b) are superimposed to form the block respectively The first side and the second side of the object, and the two gold-sprayed layers (4a, 4b) are respectively located on the first side and the second side. The folded film capacitor and the manufacturing method of the present invention solve the problem of few contact points between the gold-sprayed electrode and the metal film at the end of the film capacitor, reduce the heat generation at the end of the capacitor, reduce the internal inductance and internal resistance of the capacitor, and improve the service life, especially Suitable for high current applications.

Description

technical field [0001] The invention belongs to the technical field of electronic components, and in particular relates to a folded film capacitor and a manufacturing method. Background technique [0002] For a long time, capacitors have been used in various electronic equipment, electrical equipment, and electromagnetic emission devices. In recent years, in order to meet the requirements of miniaturization of electronic equipment, electrical equipment, and electromagnetic emission devices, metallized film capacitors have been gradually used as the above-mentioned capacitors in large quantities. . The metallized film capacitor is characterized in that the metal film is attached to the insulating medium by evaporation method, so the thickness of the metal film is usually about 10nm, and the corresponding square resistance of the metal film is about milliohms. Since the thickness of the metal film is much smaller than the thickness of the insulating film, high energy storage ...

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Problems solved by technology

However, this process is complex and costly, and the small contact area cannot effectively improve the contact resistance at the end of the electrode, which is easy to fall off when the distance between the wrong sides is small; the large distance between the wrong sides will cause the increase of the non-stacked part, which will reduce the energy storage density of the capacitor.

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