摘要:
A capacitor assembly that is stable under extreme conditions is provided. More particularly, the assembly includes a capacitor element that is positioned within an interior cavity of a housing. The housing includes a base to which the capacitor element is connected. The housing also includes a lid that contains an outer wall from which extends a sidewall. An end of the sidewall is defined by a lip extending at an angle relative to the longitudinal direction and having a peripheral edge located beyond a periphery of the sidewall. The lip is hermetically sealed to the base. In some cases, the peripheral edge of the lip is also coplanar with an edge of the base. The use of such a lip can enable a more stable connection between the components and improve the seal and mechanical stability of the capacitor assembly, thereby allowing it to better function under extreme conditions.
摘要:
A capacitor assembly that is stable under extreme conditions is provided. More particularly, the assembly includes a capacitor element that is positioned within an interior cavity of a housing. The housing includes a base to which the capacitor element is connected. The housing also includes a lid that contains an outer wall from which extends a sidewall. An end of the sidewall is defined by a lip extending at an angle relative to the longitudinal direction and having a peripheral edge located beyond a periphery of the sidewall. The lip is hermetically sealed to the base. In some cases, the peripheral edge of the lip is also coplanar with an edge of the base. The use of such a lip can enable a more stable connection between the components and improve the seal and mechanical stability of the capacitor assembly, thereby allowing it to better function under extreme conditions.
摘要:
A capacitor assembly that is thermally and mechanically stable in high temperature environments is provided. Thermal stability is provided by enclosing and hermetically sealing the capacitor element within a housing in the presence of a gaseous atmosphere that contains an inert gas, thereby limiting the amount of oxygen and moisture supplied to the solid electrolyte of the capacitor. To provide the assembly with good mechanical stability, a polymeric restraint is also employed that is positioned adjacent to and in contact with one or more surfaces of the capacitor element. Without intending to be limited by theory, it is believed that the strength and rigidity of the polymeric restraint can help the capacitor element better withstand vibrational forces incurred during use without resulting in delamination. In this manner, the capacitor assembly is able to better function in high temperature environments.
摘要:
A capacitor assembly for use in high voltage and high temperature environments is provided. More particularly, the capacitor assembly includes a capacitor element containing an anodically oxidized porous, sintered body that is coated with a manganese oxide solid electrolyte. To help facilitate the use of the capacitor assembly in high voltage (e.g., above about 35 volts) and high temperature (e.g., above about 175° C.) applications, the capacitor element is enclosed and hermetically sealed within a housing in the presence of a gaseous atmosphere that contains an inert gas.
摘要:
A capacitor assembly for use in high voltage and high temperature environments is provided. More particularly, the capacitor assembly includes a capacitor element containing an anodically oxidized porous, sintered body that is coated with a manganese oxide solid electrolyte. To help facilitate the use of the capacitor assembly in high voltage (e.g., above about 35 volts) and high temperature (e.g., above about 175° C.) applications, the capacitor element is enclosed and hermetically sealed within a housing in the presence of a gaseous atmosphere that contains an inert gas.
摘要:
A capacitor assembly that is thermally and mechanically stable in high temperature environments is provided. Thermal stability is provided by enclosing and hermetically sealing the capacitor element within a housing in the presence of a gaseous atmosphere that contains an inert gas, thereby limiting the amount of oxygen and moisture supplied to the solid electrolyte of the capacitor. To provide the assembly with good mechanical stability, a polymeric restraint is also employed that is positioned adjacent to and in contact with one or more surfaces of the capacitor element. Without intending to be limited by theory, it is believed that the strength and rigidity of the polymeric restraint can help the capacitor element better withstand vibrational forces incurred during use without resulting in delamination. In this manner, the capacitor assembly is able to better function in high temperature environments.
摘要:
The present invention relates to a method of manufacturing a porous article, in particular the anode of a valve action material based solid state capacitor, comprising the steps of combining a water soluble polymeric binder and particulate material before pressing the particulate material and the subsequent step of removing the binder form the pressed pellet. Thus, the present invention also relates to a method of removing a water soluble polymeric binder from pressed particulate material and to a composition comprising a water soluble polymeric binder for forming the anode of a valve action material based solid state capacitor.
摘要:
A wet electrolytic capacitor that includes a porous anode body containing a dielectric layer, a cathode containing a metal substrate on which is disposed a conductive polymer coating, and an electrolyte is provided. The conductive polymer coating is in the form of a dispersion of particles having a relatively small size, such as an average diameter of from about 1 to about 500 nanometers, in some embodiments from about 5 to about 400 nanometers, and in some embodiments, from about 10 to about 300 nanometers. The relatively small size of the particles used in the coating increases the surface area that is available for adhering to the metal substrate, which in turn improves mechanical robustness and electrical performance (e.g., reduced equivalent series resistance and leakage current). Another benefit of employing such a dispersion for the conductive polymer coating is that it may be able to better cover crevices of the metal substrate and improve electrical contact.
摘要:
An electrolytic capacitor that contains an anodically oxidized anode that is incorporated with an additional metallic element is provided. More specifically, the metallic element is built into the valve metal pentoxide of the dielectric layer. In one particular embodiment, the addition of the metallic element results in a niobium pentoxide dielectric that contains closely packed units of O atoms, Nb6 octahedral, and metal atoms (“A”) that serve as counter cations. The use of relatively small electropositive metal atoms (A″) helps fill the tetrahedral (e.g., Al, Si, Ti, Mg, or Mn), octahedral (e.g., Nb, V, Mg, or Mn) and trigonal bipyramid (e.g., V, Nb) interstices of the crystals. The stability of capacitor leakage current may be improved by variation in this crystal structure.
摘要:
The present invention concerns the field of solid state capacitors and is directed more particularly to a method for manufacturing solid state electrolytic capacitors formed from porous conductive metal oxide anode bodies and having a cathode layer of conducting polymer, and capacitors thereby formed. There is disclosed a solid state capacitor comprising a porous anode body, a dielectric layer formed on surfaces of the porous anode body and a cathode layer formed on the dielectric layer, characterised by the combination of the anode body being formed from an electrically conducting ceramic material and the cathode layer being formed from an electrically conductive polymer material. The conducting ceramic material may be a metal oxide or nitride.