An electrolytic capacitor module includes a plurality of capacitor elements, an electrode lead, a sealing member, and a heat dissipation member. The electrode lead is electrically connected to each of the plurality of capacitor elements, and penetrates through the sealing member. The heat dissipation member has a plurality of housing portions that respectively house the plurality of capacitor elements. Further, the heat dissipation member has a first surface and a second surface opposite to the first surface. Each of the plurality of housing portions has an insertion opening opened in the first surface. The sealing member seals the insertion opening. The electrode lead is led out from the insertion opening.

An electrolytic capacitor that includes a resin molded body including a stack that includes a capacitor element with an anode exposed at a first end surface, a dielectric layer on a surface of the anode, and a cathode opposite to the anode and exposed at a second end surface; a first external electrode on the first end surface and electrically connected to the anode; and a second external electrode on the second end surface and electrically connected to the cathode, wherein the first external electrode and the second external electrode each include: a resin electrode layer containing a conductive component and a resin component; and a Ni plating layer on a surface of the resin electrode layer, wherein a ratio of a thickness of the resin electrode layer to a thickness of the Ni plating layer is 5 or less.

A solid electrolytic capacitor that includes: a capacitor element having a valve action metal base with a core portion, a first porous portion and a second porous portion, a first dielectric layer on the first porous portion, a first solid electrolyte layer on the first dielectric layer, a first conductor layer on the first solid electrolyte layer, a second dielectric layer on the second porous portion, and a second solid electrolyte layer on the second dielectric layer, the first dielectric layer and the first solid electrolyte layer constituting a first capacitance portion, and the second dielectric layer and the second solid electrolyte layer constituting a second capacitance portion; a cathode through electrode electrically connecting the first capacitance portion to a cathode external electrode; and a connection portion connecting the second capacitance portion to the first capacitance portion.

The electrolytic capacitor has a conductive sheet with a central portion defined by a peripheral edge, a first tail extending out from the peripheral edge in a first direction, and a second tail extending out from the peripheral edge in a second direction. The second direction is opposite the first direction. The first tail and the second tail each have a free end with a first recess at the free.

A solid electrolytic capacitor element that includes: an anode plate having a first main surface and a second main surface which oppose each other in a thickness direction thereof, and made of a valve-action metal; a porous layer on at least one main surface of the anode plate; a dielectric layer on a surface of the porous layer; a cathode layer including a solid electrolyte layer on a surface of the dielectric layer; and a stress relaxation layer, wherein in a plan view of the first main surface, at least a portion of the stress relaxation layer overlaps with the anode plate, and the portion of the stress relaxation layer does not overlap with the cathode layer.

A system and method for reforming an electrolytic capacitor. A method includes disabling a primary switch, the primary switch selectively couples a power supply to the electrolytic capacitor, and providing a signal to one or more reforming switches to control the one or more reforming switches. The method includes completing the reforming process based at least in part on a detection of a voltage of the electrolytic capacitor or a duration of time, and disabling the one or more switches responsive to completing the reforming process.

A stacked solid electrolytic capacitor is provided in the present disclosure. The stacked solid electrolytic capacitor includes a capacitive module, a conductive module and a packaging structure. The capacitive module includes capacitive units stacked up sequentially. The conductive module includes a positive terminal, a negative terminal and at least one anti-oxidizing layer. The positive terminal is electrically connected to one of the capacitive units. The negative terminal is electrically connected to the one of the capacitive units through a conductive paste layer. The at least one anti-oxidizing layer is arranged between the negative terminal and the conductive paste layer. The packaging structure surrounds the capacitive module and the conductive module. Therefore, it is difficult for an oxide layer forming between the negative terminal and the capacitive units, and the equivalent series resistance of the stacked solid electrolytic capacitor can be reduced.

A stacked solid electrolytic capacitor is provided in the present disclosure. The stacked solid electrolytic capacitor includes a capacitive module, a conductive module and a packaging structure. The capacitive module includes capacitive units stacked up sequentially. The conductive module includes a positive terminal, a negative terminal and at least one anti-oxidizing layer. The positive terminal is electrically connected to one of the capacitive units. The negative terminal is electrically connected to the one of the capacitive units through a conductive paste layer. The at least one anti-oxidizing layer is arranged between the negative terminal and the conductive paste layer. The packaging structure surrounds the capacitive module and the conductive module. Therefore, it is difficult for an oxide layer forming between the negative terminal and the capacitive units, and the equivalent series resistance of the stacked solid electrolytic capacitor can be reduced.

A solid electrolytic capacitor that includes a capacitor element laminate, a first external electrode, and a second external electrode. The capacitor element laminate includes capacitor elements, cathode lead-out layers, and a sealing body. At least one capacitor element includes an anode foil, dielectric layers, and cathode layers. The first external electrode is connected to the anode foil exposed at the first end surface of the capacitor element laminate. The second external electrode is connected to the cathode lead-out layers exposed at the second end surface of the capacitor element laminate. A first cathode lead-out layer and a second cathode lead-out layer are both conductive paste layers, and uniformly extend from where the first cathode lead-out layer and the second cathode lead-out layer are disposed on the cathode layers to the second external electrode.

The invention offers an ultracapacitor-based power system solution with four main functional blocks which are power conditioning block, monitoring block, charge-discharge block and protection block. The proposed system has the advantage of working well in the environment of vibration, high temperature, has a large capacity to provide a large amount and radiates less heat compared to systems using traditional batteries. In addition, the system has functions to protect and stabilize the output voltage, and the operating parameters of the system is monitored continuously.