Abstract: An ultracapacitor that contains at least one electrochemical cell is provided. The cell includes a first electrode that contains a first carbonaceous coating (e.g., activated carbon particles) electrically coupled to a first current collector, a second electrode that contains a second carbonaceous coating (e.g., activated carbon particles) electrically coupled to a second current collector, an aqueous electrolyte in ionic contact with the first electrode and the second electrode and that contains a polyprotic acid (e.g., sulfuric acid), and a separator that is positioned between the first and second electrodes. Through selective control over the particular nature of the materials used to form the ultracapacitor, as well as the manner in which they are formed, a variety of beneficial properties may be achieved.

Abstract: A supercapacitor module is provided. In some implementations, the supercapacitor module may include a first supercapacitor having a first parameter value for a capacitor parameter in a first test condition. The supercapacitor module may include a second supercapacitor having a second parameter value for the capacitor parameter in about the first test condition. A ratio of the second parameter value to the first parameter value may be from about 0.8 to about 1.2. The supercapacitor module may prevent overvoltages across the first and second supercapacitors, such that the supercapacitor module may satisfactorily operate without a balancing circuit.

Abstract: A module comprises a first ultracapacitor having a first terminal, a second ultracapacitor having a second terminal, and an interconnect strip is provided. The interconnect strip contains a central section positioned between a first attachment section and a second attachment section. The first terminal of the first ultracapacitor is connected to the first attachment section of the strip and the second terminal of the second ultracapacitor is connected to the second attachment section of the strip. Further, the central section is formed from a flexible conductive material.

Abstract: An ultracapacitor that is capable of exhibiting good properties even after being subjected to high temperatures, such as experienced during solder reflow, is provided. The ultracapacitor contains a housing having sidewalls that extend in a direction generally perpendicular to a base. An interior cavity is defined between an inner surface of the base and the sidewalls within which an electrode assembly can be positioned. To attach the electrode assembly, first and second conductive members are disposed on the inner surface of the base. The electrode assembly likewise contains first and second leads that extend outwardly therefrom and are electrically connected to the first and second conductive members, respectively. The first and second conductive members are, in turn, electrically connected to first and second external terminations, respectively, which are provided on an outer surface of the base.

Abstract: A stripper for stripping coating off of coated sucker rod is provided. The stripper can have a frame having spaced-apart and opposing end plates with a passageway for receiving the coated rod. Rollers located in the frame guide the coated rod as it passes through the passageway. A cutting bar contacts the coated rod to cut a strip off of the coated rod, leaving a remainder of coating that can be deflected off of the coated rod by a deflector as the coated rod passes through the stripper.

Abstract: Systems and methods of charging and discharging an ultracapacitor are disclosed. In one embodiment, a circuit for charging a capacitor can include a power source configured to provide a source voltage. The circuit can further include an ultracapacitor, a temperature sensing device, a power converter, and one or more control devices configured to receive signals indicative of a temperature from the temperature sensing device, and to control operation of the power converter based at least in part on the one or more signals indicative of the temperature.

Abstract: An ultracapacitor that comprises a first and second electrochemical cell that are connected in parallel is provided. The cells are define by a first electrode that contains a current collector having opposing sides coated with a carbonaceous material, a second electrode that contains a current collector having opposing sides coated with a carbonaceous material, and a separator positioned between the first electrode and the second electrode. The second cell is by the second electrode, a third electrode that contains a current collector having opposing sides coated with a carbonaceous material, and a separator positioned between the second electrode and the third electrode. The ultracapacitor also contains a nonaqueous electrolyte that is in ionic contact with the electrodes and contains a nonaqueous solvent and an ionic liquid. A package encloses the first cell, the second cell, and the nonaqueous electrolyte.

Abstract: An ultracapacitor that is in contact with a hot atmosphere having a temperature of about 80° C. or more is provided. The ultracapacitor contains a first electrode, second electrode, separator, nonaqueous electrolyte, and housing is provided. The first electrode comprises a first current collector electrically coupled to a first carbonaceous coating and the second electrode comprises a second current collector electrically coupled to a second carbonaceous coating. The capacitor exhibits a capacitance value within the hot atmosphere of about 6 Farads per cubic centimeter or more as determined at a frequency of 120 Hz and without an applied voltage.

Abstract: A stripper for stripping coating off of coated sucker rod is provided. The stripper can have a frame having spaced-apart and opposing end plates with a passageway for receiving the coated rod. Rollers located in the frame guide the coated rod as it passes through the passageway. A cutting bar contacts the coated rod to cut a strip off of the coated rod, leaving a remainder of coating that can be deflected off of the coated rod by a deflector as the coated rod passes through the stripper.

Abstract: In one embodiment, an electrical connector comprises a terminal and a connector body. The electrical connector may have a base and at least one resilient terminal beam, the terminal beam including an electrical contact surface and a locking tab at its free end. The connector body may have a cavity configured to house at least a portion of the terminal beam. The cavity may have one or more interior walls with at least one ramp along an interior wall (e.g., that reduces a portion of the cavity in at least one dimension), and a relief positioned at the end of the ramp, wherein the ramp momentarily deflects the resilient terminal beam during insertion of the terminal into the connector body, and the relief provides a reversible locking engagement with the locking tab of the terminal (e.g., fork terminal). Associated methods are also provided.

Abstract: A roll-up door system has been provided to position a roll-up door. The roll-up door system uses a combination of electrical and mechanical systems, to achieve automatic locking and automated maneuvering of the roll-up door. The roll-up door system includes a guide-track assembly, a roll-up door moving along the guide track assembly, a linkage mechanism connected to the roll-up door for guiding the roll-up door along the guide-track assembly, an automated driving mechanism connected to the linkage mechanism for controlling the movement of the roll-up door along the guide-track assembly, and a radio-controlled electrical circuit for activating the automated driving mechanism.

Abstract: A system and method for removing contaminants from water that has a relatively low oxygen content with naturally occurring chemoautotrophic bacteria, ferrous iron, manganese, sulfide, and other contaminants. The system comprises an oxygenation vessel for oxygenating the water and a filtration vessel having bio-filtration media with surfaces that are exposed to the oxygenated water. The chemoautotrophic bacteria propagate in the presence of the oxygenated water and deposit certain of the contaminants on the bio-filtration media as by-products. The contaminants are also precipitated in the presence of the oxygenated water and settle on the bio-filtration media in at least the filtration vessel. A secondary filtration stage can further remove contaminants from the water that were not sufficiently removed by the first filtration stage.

Abstract: A system and method for removing contaminants from water that has a relatively low oxygen content with naturally occurring chemoautotrophic bacteria, ferrous iron, manganese, sulfide, and other contaminants. The system comprises an oxygenation vessel for oxygenating the water and a filtration vessel having bio-filtration media with surfaces that are exposed to the oxygenated water. The chemoautotrophic bacteria propagate in the presence of the oxygenated water and deposit certain of the contaminants on the bio-filtration media as by-products. The contaminants are also precipitated in the presence of the oxygenated water and settle on the bio-filtration media in at least the filtration vessel. A secondary filtration stage can further remove contaminants from the water that were not sufficiently removed by the first filtration stage.