An electronic unit includes an electrolytic capacitor, a covering resin layer, and electronic components. The electrolytic capacitor is on an upper surface of an insulating substrate. The covering resin layer covers the upper surface of the insulating substrate and the electronic components. Part of the covering resin layer serves as an electrolytic capacitor covering portion. The electrolytic capacitor covering portion includes an outer peripheral covering portion that covers an outer peripheral surface of the electrolytic capacitor and a top covering portion that covers a top portion of the electrolytic capacitor. A thin wall groove is formed in the top covering portion. The outer peripheral covering portion extends upward beyond the top covering portion by a height h. The top covering portion easily breaks at the thin wall groove so that an explosion-proof valve easily operates. A region corresponding to the height h creates an operating space of the explosion-proof valve.

A solid electrolytic capacitor that includes: a capacitor element; a sealing material that seals the capacitor element to form a sealing body; and a vent structure embedded in the sealing material such that a portion of the vent structure is exposed on an outer surface of the sealing body, the vent structure being composed of a material that has a self-sealing valve action in which the vent structure turns into a melt at a reflow mounting temperature and the melt cleaves when receiving pressure of vaporized components generated inside the sealing body so as to form a hole communicating from an inside to the outer surface of the sealing body to discharge the vaporized components, and upon being cooled from the reflow mounting temperature, the melt flows and then solidifies so as to block the hole.

An electric compressor includes a housing and a cover. The housing accommodates a compression portion and an electric motor. The cover is attached to an outer surface of the housing and cooperates with the outer surface of the housing to define an accommodation space. An inverter is accommodated in the accommodation space and configured to drive the electric motor. The inverter includes a circuit board, an electrolytic capacitor, and a capacitor cover at least partly covering the electrolytic capacitor. The electrolytic capacitor includes a cylindrical main body having a first end and a second end, a lead extending from the first end of the main body and connected to the circuit board, and a pressure relief vent on the second end of the main body. The capacitor cover is interposed between the circuit board and a peripheral edge of the second end of the electrolytic capacitor.

An electric compressor includes a housing and a cover. The housing accommodates a compression portion and an electric motor. The cover is attached to an outer surface of the housing and cooperates with the outer surface of the housing to define an accommodation space. An inverter is accommodated in the accommodation space and configured to drive the electric motor. The inverter includes a circuit board, an electrolytic capacitor, and a capacitor cover at least partly covering the electrolytic capacitor. The electrolytic capacitor includes a cylindrical main body having a first end and a second end, a lead extending from the first end of the main body and connected to the circuit board, and a pressure relief vent on the second end of the main body. The capacitor cover is interposed between the circuit board and a peripheral edge of the second end of the electrolytic capacitor.

A solid electrolytic capacitor is provided that includes a capacitor element having a valve action metal base with a porous portion on a first main surface of a core portion, a dielectric layer disposed on a surface of the porous portion, a solid electrolyte layer disposed on the dielectric layer, and a conductor layer disposed on the solid electrolyte layer. Moreover, the capacitor includes a sealing layer that seals a first main surface of the capacitor element, a cathode outer electrode electrically connected to the conductor layer, and an anode outer electrode electrically connected to the valve action metal base. The sealing layer and the cathode outer electrode are disposed on the conductor layer and a cathode through-electrode extends through the sealing layer on the conductor layer. The conductor layer and the cathode outer electrode are connected to each other with the cathode through-electrode interposed therebetween.

A solid electrolytic capacitor is provided that includes a capacitor element having a valve action metal base with a porous portion on a first main surface of a core portion, a dielectric layer disposed on a surface of the porous portion, a solid electrolyte layer disposed on the dielectric layer, and a conductor layer disposed on the solid electrolyte layer. Moreover, the capacitor includes a sealing layer that seals a first main surface of the capacitor element, a cathode outer electrode electrically connected to the conductor layer, and an anode outer electrode electrically connected to the valve action metal base. The sealing layer and the cathode outer electrode are disposed on the conductor layer and a cathode through-electrode extends through the sealing layer on the conductor layer. The conductor layer and the cathode outer electrode are connected to each other with the cathode through-electrode interposed therebetween.

The present disclosure generally relates to a venting system that includes a wall of a lid or a container. The lid or container defines a central longitudinal axis, and a line segment that is measured from the longitudinal axis to an outermost surface of the lid or container, and a pressure relief feature that is disposed along the lid or container. The pressure relief feature includes a thinned region of the lid or container that defines a minimum thickness that is less than 40% of a maximum thickness of the respective lid or container.

Included are: a cylindrical body (cylindrical portion 16) provided with a shaft portion (18); and a first valve body (11) that is in close contact with the shaft portion to close an opening portion (22) of the cylindrical body, and is separated from the shaft portion when pressure (P) in the cylindrical body rises to a threshold (Pth) or higher by gas that has entered the cylindrical body, to release the gas from the cylindrical body to the outside. The valve body includes a closing portion (40) that receives the pressure (P) of the gas in the cylindrical body. The pressure received by the closing portion (40) serves as a valve opening force. As a result, the discharge characteristics of the gas filling a case are improved to enhance a pressure regulation function.

Included are: a cylindrical body (cylindrical portion 16) provided with a shaft portion (18); and a first valve body (11) that is in close contact with the shaft portion to close an opening portion (22) of the cylindrical body, and is separated from the shaft portion when pressure (P) in the cylindrical body rises to a threshold (Pth) or higher by gas that has entered the cylindrical body, to release the gas from the cylindrical body to the outside. The valve body includes a closing portion (40) that receives the pressure (P) of the gas in the cylindrical body. The pressure received by the closing portion (40) serves as a valve opening force. As a result, the discharge characteristics of the gas filling a case are improved to enhance a pressure regulation function.

A can for an electrolytic capacitor is disclosed. In an embodiment a can for an electrolytic capacitor includes a bottom including a first area and a second area, wherein the first area is recessed relative to the second area at an outer surface of the bottom of the can.