A seat plate assembly for fixing a capacitor on a circuit board, including a base plate, a first guard plate, a second guard plate, a third guard plate, a fourth guard plate, a first reinforcing rib and a second reinforcing rib. The first guard plate, the second guard plate, the third guard plate and the fourth guard plate are provided spaced apart on an upper end surface of the base plate in sequence. The first reinforcing rib is configured to connect the first guard plate with the second guard plate. The second reinforcing rib is configured to connect the third guard plate with the fourth guard plate.

A wet tantalum electrolytic capacitor containing a cathode, fluidic working electrolyte, and anode formed from an anodically oxidized sintered porous tantalum pellet is described. The pellet is formed from a pressed tantalum powder. The tantalum powder is formed by reacting a tantalum oxide compound, for example, tantalum pentoxide, with a reducing agent that contains a metal having an oxidation state of 2 or more, for example, magnesium. The resulting tantalum powder is nodular or angular and has a specific charge that ranges from about 9,000 μF*V/g to about 11,000 μF*V/g. Using this powder, wet tantalum electrolytic capacitors have breakdown voltages that ranges from about 340 volts to about 450 volts. This makes the electrolytic capacitors ideal for use in an implantable medical device.

A wet tantalum electrolytic capacitor containing a cathode, fluidic working electrolyte, and anode formed from an anodically oxidized sintered porous tantalum pellet is described. The pellet is formed from a pressed tantalum powder. The tantalum powder is formed by reacting a tantalum oxide compound, for example, tantalum pentoxide, with a reducing agent that contains a metal having an oxidation state of 2 or more, for example, magnesium. The resulting tantalum powder is nodular or angular and has a specific charge that ranges from about 9,000 μF*V/g to about 11,000 μF*V/g. Using this powder, wet tantalum electrolytic capacitors have breakdown voltages that ranges from about 340 volts to about 450 volts. This makes the electrolytic capacitors ideal for use in an implantable medical device.

A capacitor (2) includes a capacitor main body (4) and a base (6). The capacitor main body includes an opening sealing member (14) attached to an opening of an outer package case (10), and a terminal lead (16-1, 16-2) led out from a first insertion through hole portion (17-1, 17-2) of the opening sealing member. The base is disposed on the side of the opening sealing member of the capacitor main body, and has a second insertion through hole portion (18-1, 18-2). For example, the base includes a first protruding portion (20) surrounding the second insertion through hole portion, so that the second insertion through hole portion of the base forms an insertion through hole. The opening distance on the side of the substrate mounting face of the insertion through hole is larger than the opening distance on the side of the capacitor main body of the insertion through hole.

A capacitor (2) includes a capacitor main body (4) and a base (6). The capacitor main body includes an opening sealing member (14) attached to an opening of an outer package case (10), and a terminal lead (16-1, 16-2) led out from a first insertion through hole portion (17-1, 17-2) of the opening sealing member. The base is disposed on the side of the opening sealing member of the capacitor main body, and has a second insertion through hole portion (18-1, 18-2). For example, the base includes a first protruding portion (20) surrounding the second insertion through hole portion, so that the second insertion through hole portion of the base forms an insertion through hole. The opening distance on the side of the substrate mounting face of the insertion through hole is larger than the opening distance on the side of the capacitor main body of the insertion through hole.

A capacitor and capacitor assemblies are provided, configured to prevent damage from shock and/or vibration. A capacitor assembly according to the invention comprises an anode plate having an anode plate wire extending from a surface of the anode plate. An anode wire holder is positioned around at least a portion of the anode plate wire. A wire separator comprising a channel is provided, at least a portion of the anode plate wire received within the channel. Methods of forming capacitors and capacitor assemblies are also provided.

A capacitor and capacitor assemblies are provided, configured to prevent damage from shock and/or vibration. A capacitor assembly according to the invention comprises an anode plate having an anode plate wire extending from a surface of the anode plate. An anode wire holder is positioned around at least a portion of the anode plate wire. A wire separator comprising a channel is provided, at least a portion of the anode plate wire received within the channel. Methods of forming capacitors and capacitor assemblies are also provided.

A capacitor includes a capacitor element that holds a predetermined solution between an anode foil and a cathode foil wound up with a separator in between, a body case that is formed in the shape of a bottomed tube closed at one end with a wall and open at the other end to have an opening, a liquid supply sheet that is arranged between the inner face of the case and the outer face of the element, and a sealing member that seals the opening. The solution has a sealing member deterioration preventing agent dissolved in a lipophilic solvent. The sheet has an absorption portion that makes contact with the separator to absorb the solution and a supply portion that makes contact with the sealing member to supply it with the solution.

A capacitor includes a capacitor element that holds a predetermined solution between an anode foil and a cathode foil wound up with a separator in between, a body case that is formed in the shape of a bottomed tube closed at one end with a wall and open at the other end to have an opening, a liquid supply sheet that is arranged between the inner face of the case and the outer face of the element, and a sealing member that seals the opening. The solution has a sealing member deterioration preventing agent dissolved in a lipophilic solvent. The sheet has an absorption portion that makes contact with the separator to absorb the solution and a supply portion that makes contact with the sealing member to supply it with the solution.

An external terminal for an electric energy storage device, which is coupled to an upper end of a cylindrical metal case to cap the metal case and has a hollow formed at a center thereof so that a safety valve is installed therein, wherein the metal case includes an outer part exposed to the outside in an erect state in a normal direction and an inner part positioned below the outer part, and wherein the inner part includes a first surface adjacent to the hollow and a second surface stepped higher than the first surface (112a) toward the outer part (111).