A capacitor array that includes a plurality of solid electrolytic capacitor elements each of which has a first main surface and a second main surface facing each other in a thickness direction and includes an anode plate made of a valve action metal, a porous layer on at least one surface of the anode plate, a dielectric layer on a surface of the porous layer, and a cathode layer on a surface of the dielectric layer and including a solid electrolyte layer; a first sealing layer in a sheet-like shape and covering the first main surface of the plurality of solid electrolytic capacitor elements; and a second sealing layer in a sheet-like shape and covering the second main surface of the plurality of solid electrolytic capacitor elements.

A capacitor array that includes a plurality of solid electrolytic capacitor elements each of which has a first main surface and a second main surface facing each other in a thickness direction and includes an anode plate made of a valve action metal, a porous layer on at least one surface of the anode plate, a dielectric layer on a surface of the porous layer, and a cathode layer on a surface of the dielectric layer and including a solid electrolyte layer; a first sealing layer in a sheet-like shape and covering the first main surface of the plurality of solid electrolytic capacitor elements; and a second sealing layer in a sheet-like shape and covering the second main surface of the plurality of solid electrolytic capacitor elements.

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.

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 capacitor, an assembly comprising a capacitor and a busbar and a method for manufacturing a capacitor are disclosed. In an embodiment a capacitor includes a winding element and a terminal having a first part of a first material and a second part of a second material, the second material being different than the first material, wherein the first part is electrically contacted to the winding element, and wherein the second part is an external contact of the capacitor.

A capacitor, an assembly comprising a capacitor and a busbar and a method for manufacturing a capacitor are disclosed. In an embodiment a capacitor includes a winding element and a terminal having a first part of a first material and a second part of a second material, the second material being different than the first material, wherein the first part is electrically contacted to the winding element, and wherein the second part is an external contact of the capacitor.

A capacitor bank which has a plurality of capacitor units, in which each capacitor has a plurality of electrical capacitor elements, and the capacitor units are divided into a plurality of groups of capacitor units. The arrangement has a plurality of group monitoring units, with one of the group monitoring units associated with each group of capacitor units. At least one of the group monitoring units is configured so that it monitors the respective group of capacitor units for a failure of a capacitor element in one of the capacitor units of the group and, when such a failure of a capacitor element is detected, transmits data which describe this failure of the capacitor element to a monitoring receiver.

A system that includes an energy device having an active region configured to generate or consume electrical energy provided by an electrical current is discussed. A current limiter is disposed between the energy device and a current collector layer. The current limiter controls the current flow between the energy device and the current collector layer. A plurality of electrochemical transistors (ECTs) are arranged in an array such that each ECT in the array provides localized current control for the energy device. Each ECT includes a gate electrode, a drain electrode, a source electrode, and a channel disposed between the drain and the source electrodes. An electrolyte electrically couples the gate electrode to the channel such that an electrical signal at the gate electrode controls electrical conductivity of the channel. The current collector layer is a shared drain or source electrode for the ECTs.

A system that includes an energy device having an active region configured to generate or consume electrical energy provided by an electrical current is discussed. A current limiter is disposed between the energy device and a current collector layer. The current limiter controls the current flow between the energy device and the current collector layer. A plurality of electrochemical transistors (ECTs) are arranged in an array such that each ECT in the array provides localized current control for the energy device. Each ECT includes a gate electrode, a drain electrode, a source electrode, and a channel disposed between the drain and the source electrodes. An electrolyte electrically couples the gate electrode to the channel such that an electrical signal at the gate electrode controls electrical conductivity of the channel. The current collector layer is a shared drain or source electrode for the ECTs.

A photocapacitor is provided. The photocapacitor includes: a perovskite solar cell and a supercapacitor attached to the perovskite solar cell. The supercapacitor includes a first carbon nanotube structure. The perovskite solar cell includes third carbon nanotube structure. The first carbon nanotube structure is directly contacted with the third carbon nanotube structure.