Wound capacitor packaging structure and sealing element thereof

A wound capacitor packaging structure, comprising:

• a wound assembly;
• a conductive assembly including a first conductive pin and a second conductive pin;
• a package casing configured to receive the wound assembly;
• and
• a sealing element disposed inside the package casing and cooperating with the package casing, wherein the sealing element is configured to prevent the wound assembly from contacting an external environment;
• wherein the package casing has a surrounding concave position-limiting portion recessed inward to press the sealing element, and a surrounding convex end portion protruding from the surrounding concave position-limiting portion to abut against the sealing element;
• wherein the sealing element includes an elastomeric seal structure pressed by the surrounding concave position-limiting portion, and an oleophobic and high-temperature-resistant structure for protecting the elastomeric seal structure;
• and
• wherein the wound capacitor packaging structure is configured to provide a predetermined initial capacitance, the oleophobic and high-temperature-resistant structure of the sealing element is configured to enable the wound capacitor packaging structure to retain more than 93% of the predetermined initial capacitance when the wound capacitor packaging structure is powered off at a maximum temperature of 150° C. for less than 4,000 hours, and the oleophobic and high-temperature-resistant structure of the sealing element is configured to enable the wound capacitor packaging structure to retain more than 85% of the predetermined initial capacitance when the wound capacitor packaging structure is powered on at a maximum temperature of 150° C. for less than 4,000 hours.

A sealing element applied to a wound capacitor packaging structure including a wound assembly, a conductive assembly and a package casing;

• wherein the sealing element is disposed inside the package casing and cooperating with the package casing, and the sealing element is configured to prevent the wound assembly from contacting an external environment;
• wherein the package casing has a surrounding concave position-limiting portion recessed inward to press the sealing element, and a surrounding convex end portion protruding from the surrounding concave position-limiting portion to abut against the sealing element;
• wherein the sealing element includes an elastomeric seal structure pressed by the surrounding concave position-limiting portion, and an oleophobic and high-temperature-resistant structure for protecting the elastomeric seal structure;
• and
• wherein the wound capacitor packaging structure is configured to provide a predetermined initial capacitance, the oleophobic and high-temperature-resistant structure of the sealing element is configured to enable the wound capacitor packaging structure to retain more than 93% of the predetermined initial capacitance when the wound capacitor packaging structure is powered off at a maximum temperature of 150° C. for less than 4,000 hours, and the oleophobic and high-temperature-resistant structure of the sealing element is configured to enable the wound capacitor packaging structure to retain more than 85% of the predetermined initial capacitance when the wound capacitor packaging structure is powered on at a maximum temperature of 150° C. for less than 4,000 hours.