Power module connection capacitor and power conversion device provided with same

A power module connection capacitor comprising:

• a housing;
• a plurality of capacitor elements that are housed in the housing and are disposed adjacent to each other;
• a positive electrode conductor that connects positive electrodes of the plurality of capacitor elements and positive electrodes of power modules disposed outside the housing;
• a negative electrode conductor that connects negative electrodes of the plurality of capacitor elements and negative electrodes of the power modules, in a state where the plurality of capacitor elements are held between the positive electrode conductor and the negative electrode conductor;
• an insulation portion housed in the housing and disposed to fill respective spaces formed between an inner surface of the housing, the plurality of capacitor elements, the positive electrode conductor, and the negative electrode conductor, thereby insulating the housing, the capacitor elements, the positive electrode conductor, and the negative electrode conductor from each other;
• and
• a conductive plate housed in the housing, and disposed between a current path of the positive electrode conductor extending from the capacitor elements to the power modules and a current path of the negative electrode conductor extending from the capacitor elements to the power modules, via the positive electrode conductor, the negative electrode conductor, and the insulation portion,
• wherein the conductive plate is formed of a material with higher heat conductivity than the insulation portion.