Capacitor

Abstract

The invention discloses a capacitor comprising a capacitor shell, capacitor core monomers, a first electrode, a second electrode and at least one heat conducting bar. One or more capacitor core monomers are arranged in the capacitor shell, and the two end faces of the capacitor core monomers are connected in parallel to form a parallel end face. The first electrode and the second electrode are respectively led out from the two parallel end faces. The capacitor shell is provided with a heat conducting bar via hole, and the heat conducting bar is in contact with at least one of the two parallelend faces and extends to the outside of the capacitor shell through the heat conducting bar via hole. A plurality of capacitor core monomers included in the capacitor shell form a parallel end surfacethrough parallel connection of the two end surfaces, and the heat conducting bar contacts the parallel end surface and extends to the outside of the capacitor shell through the heat conducting bar via hole so that the thermal resistance from the capacitor core to the external contact surface is greatly reduced, the heat dissipation capability of the capacitor is enhanced, the ability of the capacitor to withstand high current is improved and the service life of the capacitor is prolonged.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to a capacitor. Background technique [0002] Film capacitors are made of metal foil as electrodes, which are overlapped with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends and then wound. In order to reduce the volume of the unit capacity of the capacitor, there is another improved manufacturing method of the film capacitor, and its finished product is called a metallized film capacitor. The method is to vacuum evaporate a thin layer of metal on the plastic film as an electrode, and then wind it to make a capacitor. [0003] The disadvantage of metallized film capacitors is that they have poor ability to withstand large currents. This is because the metallized film layer is much thinner than the metal foil and has a weaker capacity to carry large currents. In order to improve the defects of metallized film capac...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of metallized film capacitors is that they have poor ability to withstand large currents

This is because the metallized film layer is much thinner than the metal foil, and the ability to carry large currents is weak

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