Capacitor module and power conversion device
View Patent ↗A power conversion device for a vehicle includes: a power module that includes a switching device and, upon operation of the switching device, converts DC power into AC power to be supplied to an electric machine for driving a vehicle; a capacitor module that includes a smoothing capacitor element, an input-side power source terminal for receiving DC power, and an output-side power source terminal for supplying DC power to the power module; and a noise removal capacitor for removing noise, wherein: the noise removal capacitor is built in the capacitor module, and the noise removal capacitor is electrically connected to the input-side power source terminal in a position where a distance between a connection position of the noise removal capacitor and the input-side power source terminal is less than a distance between a connection position of the noise removal capacitor and the output-side power source terminal of the capacitor module.
1. A capacitor module, comprising:
a capacitor element;
a filling material that seals the capacitor element;
a first electrode terminal-side rising portion that is electrically connected with the capacitor element and that rises from the filling material;
a second electrode terminal-side rising portion that is electrically connected with the capacitor element and that rises from the filling material;
a first electrode terminal-side capacitor terminal that is connected with an end portion of the first electrode terminal-side rising portion;
a second electrode terminal-side capacitor terminal that is connected with an end portion of the second electrode terminal-side rising portion; and
an insulation member disposed between the first electrode terminal-side rising portion and the second electrode terminal-side rising portion, wherein:
the second electrode terminal-side capacitor terminal is formed along a direction to be separated from the first electrode terminal-side capacitor terminal;
a connecting surface of the first electrode terminal-side capacitor terminal, facing outside of the first electrode terminal-side capacitor terminal, is formed lower than a connecting surface of the second electrode terminal-side capacitor terminal, facing outside of the second electrode terminal-side capacitor terminal; and
the insulation member is formed by being bent towards a side at which the first electrode terminal-side capacitor terminal is disposed.
2. A capacitor module according to claim 1 , wherein:
the insulation member is an insulation cover formed with an insulating member;
the insulation cover includes an insulation cover main surface unit sandwiched between the first electrode terminal-side rising portion and the second electrode terminal-side rising portion and includes an upper rising portion rising from an upper part of the insulation cover main surface unit; and furthermore
the insulation cover is arranged so that the upper rising portion covers a part of the first electrode terminal-side capacitor terminal.
3. A capacitor module according to claim 2 , wherein:
the insulation cover further includes a lateral rising portion rising from a lateral part of the insulation cover main surface unit; and
the lateral rising portion covers a part of the first electrode terminal-side capacitor terminal.
4. A capacitor module according to claim 2 , wherein:
the insulation cover further includes a lateral rising portion rising from a lateral part of the insulation cover main surface unit; and
the lateral rising portion covers a part of the first electrode terminal-side capacitor terminal and a part of the second electrode terminal-side capacitor terminal.
5. A power conversion device, comprising:
a power module that converts DC current into AC current;
a capacitor module that smoothes DC voltage;
a conductor plate that electrically connects the power module with the capacitor module; and
a metal housing that houses the capacitor module, wherein:
the capacitor module includes:
a capacitor element;
a filling material that seals the capacitor element;
a first electrode terminal-side rising portion that is electrically connected with the capacitor element and that rises from the filling material;
a second electrode terminal-side rising portion that is electrically connected with the capacitor element and that rises from the filling material;
a first electrode terminal-side capacitor terminal that is connected with an end portion of the first electrode terminal-side rising portion;
a second electrode terminal-side capacitor terminal that is connected with an end portion of the second electrode terminal-side rising portion; and
an insulation member disposed between the first electrode terminal-side rising portion and the second electrode terminal-side rising portion;
the second electrode terminal-side capacitor terminal is formed along a direction to be separated from the first electrode terminal-side capacitor terminal;
the conductor plate is constituted with a first electrode terminal-side conductor plate connected with the first electrode terminal-side capacitor terminal and a second electrode terminal-side conductor plate connected with the second electrode terminal-side capacitor terminal;
the second electrode terminal-side conductor plate is formed by covering the first electrode terminal-side capacitor terminal and the second electrode terminal-side capacitor terminal;
the first electrode terminal-side conductor plate is disposed between the first electrode terminal-side capacitor terminal and the second electrode terminal-side conductor plate; and
the insulation member is formed by being bent towards a side at which the first electrode terminal-side capacitor terminal is disposed so that the insulation member is sandwiched between the first electrode terminal-side conductor plate and the second electrode terminal-side conductor plate.
6. A power conversion device according to claim 5 , wherein:
the insulation member is an insulation cover formed with an insulating member;
the insulation cover includes an insulation cover main surface unit sandwiched between the first electrode terminal-side rising portion and the second electrode terminal-side rising portion and includes and upper rising portion rising form an upper part of the insulation cover main surface unit; and furthermore
the insulation cover is arranged so that the upper rising portion covers a part of the first electrode terminal-side capacitor terminal.
7. A power conversion device according to claim 6 , wherein:
the insulation cover further includes a lateral rising portion rising from a lateral part of the insulation cover main surface unit; and
the lateral rising portion covers a part of the first electrode terminal-side capacitor terminal.
8. A power conversion device according to claim 6 , wherein:
the insulation cover further includes a lateral rising portion rising from a lateral part of the insulation cover main surface unit; and
the lateral rising portion covers a part of the first electrode terminal-side capacitor terminal and a part of the second electrode terminal-side capacitor terminal.