Abstract: A method includes processes of (a processing part 8) calculating an estimated heat generation temperature by using drive conditions (22, a storage part 6) at least including drive timing information (18) and drive current value information (20), and temperature change characteristic information (24) of a capacitor, calculating state change information (28) of the capacitor after elapse of a reference time by using the estimated heat generation temperature, and calculating a lifespan estimation value (lifespan estimation result 30) of the capacitor by using the state change information. This enables capacitor lifespan estimation corresponding to fluctuations of a drive current value flowing through the capacitor, the applicability of the capacitor is confirmed, and the safety of equipment using the capacitor is improved.

Abstract: A method includes processes of (a processing part 8) calculating an estimated heat generation temperature by using drive conditions (22, a storage part 6) at least including drive timing information (18) and drive current value information (20), and temperature change characteristic information (24) of a capacitor, calculating state change information (28) of the capacitor after elapse of a reference time by using the estimated heat generation temperature, and calculating a lifespan estimation value (lifespan estimation result 30) of the capacitor by using the state change information. This enables capacitor lifespan estimation corresponding to fluctuations of a drive current value flowing through the capacitor, the applicability of the capacitor is confirmed, and the safety of equipment using the capacitor is improved.

Abstract: A capacitor includes a capacitor element having electrode foils on the anode side and the cathode side laminated via separators, connecting parts of terminal components being disposed inside a laminated portion of the electrode foils and the separators, the connecting parts being connected to the electrode foils on the anode side and the cathode side; and a case that includes a storage part storing the capacitor element and having an opening portion sealed by a sealing body, that has a crimped part crimped from the outside of the storage part toward a side surface of the capacitor element, and that holds the capacitor element with the crimped part. The case is crimped to form the crimped part while avoiding a position at which the electrode foils of the capacitor element in the storage part overlap with tip portions of the connecting parts of the terminal components.

Abstract: A capacitor includes a capacitor element having electrode foils on the anode side and the cathode side laminated via separators, connecting parts of terminal components being disposed inside a laminated portion of the electrode foils and the separators, the connecting parts being connected to the electrode foils on the anode side and the cathode side; and a case that includes a storage part storing the capacitor element and having an opening portion sealed by a sealing body, that has a crimped part crimped from the outside of the storage part toward a side surface of the capacitor element, and that holds the capacitor element with the crimped part. The case is crimped to form the crimped part while avoiding a position at which the electrode foils of the capacitor element in the storage part overlap with tip portions of the connecting parts of the terminal components.