Abstract:
In an air-metal fuel cell battery system (1), metal-fuel tape (3), an ionically-conductive medium (2) and a cathode structure (4) are transported at substantially the same velocity at the locus of points at which the ionically-conductive medium contains the cathode structure and the metal-fuel tape during discharging and recharging modes of operation. In a first generalized embodiment of the present invention, the ionically-conductive medium is realized as an ionically-conductive belt, which is transported at substantially the same velocity as the metal-fuel tape and cathode structure at the locus of points where they are in contact. In a generalized second embodiment, the ionically-conductive medium is realized as a solid-state gel-like film layer integrated with the metal-fuel tape, which is transported at the same velocity as the cathode structure where they are in contact. In a third generalized embodiment, the ionically-conductive medium is realized as a solid-state film layer integrated with the movable cathode structure, which is transported at substantially the same velocity as the metal-fuel tape where they are in contact. By transporting the movable cathode structure, ionically-conductive medium and metal-fuel tape within the system as described above, generation of frictional forces among these components is minimized during the operation of the system, and damage to these components is reduced.
Abstract:
An uninterruptible power generation and distribution system having a refuelable and rechargeable metal-air FCB based power supply unit for generating and providing electrical power to at least one electrical-energy-consuming load device. An interruptible power source is used to recharge the metal-air FCB subsystems embodied therein. A control subsystem automatically transitions between discharging mode (wherein at least one metal-air FCB subsystem supplies electrical power to the electrical power-consuming load device) and a recharging mode (wherein the external power source is electrically coupled to at least one metal-air FCB subsystem to thereby recharge the metal-air FCB subsystem(s). The metal-air FCB subsystem(s) are refueled by manually loading and unloading metal-fuel from the metal-air FCB subsystem(s). Preferably, electrical power provided to the at least one electrical power-consuming load device is supplied solely by electrical power generated by discharging metal-fuel in the metal-air fuel cell battery subsystem(s).
Abstract:
A novel battery construction including a plurality of discharging cells formed by a cathode structure (20) having a plurality of relatively small cathode elements (21A) on a cathode support structure, and an anode structure (23) having one or more anode-contacting elements (24B) on an anode-contacting element support plate. Each discharging cell can be independently activated using a transistor-based power switching element operated by a switching controller. In some embodiments, the power switching elements are used to control the power delivered to electrical loads during discharging. In other embodiments, the power switching elements are used to produce high-frequency electrical currents. The battery construction may also include a plurality of recharging cells. In one embodiment, power switching elements are provided for controlling the recharging cells during recharging. In other embodiments, metal-fuel cards (29) are used as fuel in metal-air fuel cell modules (1).
Abstract:
A recyclable fuel distribution system comprising a hierarchy of operatively linked (with fuel supply and reaction product collection elements) fluid fuel transport vehicles, fluid fuel storage tanks, fuel supply reservoirs (optional depending on specific use), and fluid fuel usage devices operatively linked to the storage tanks or supply reservoirs, as applicable. The fuel, during use, undergoes a reversible chemical reaction, whereby collected reaction product is reversible to the original fuel. At least one and preferably all of the vehicles, storage tanks and reservoirs contain a storage volume with separated chambers, adapted to inversely change relative to fuel being supplied and reaction product being collected and stored. As a result, a single volume during transport, storage, and use, provides the dual function of fuel supply and collection of reversible reaction product, with concomitant nearly halving of transport, storage and use volumes and costs. Electrical production with a zinc fuel which reversibly forms a zinc oxide reaction product is a particularly suitable fuel for the present system for use in large scale fuel cell applications. Applications range from large scale megawatt power levels for industrial levels to tens of kilowatts for homes and transportation systems down to several watts for portable electrical and electronic appliances and devices.
Abstract:
Fuel cells (1) are stacked, supported and electrically connected into a battery structure with a connector block (20). The anode and cathode elements of each fuel cell are provided with conductive terminating elements, preferably extending downward U-shaped configuration from the upper ends of the elements. The connector block comprises a series of conductive apertures which positioned and sized to accommodate the conductive terminating elements. When the terminating elements and apertures are engaged, the connector block mechanically supports the anodes and cathodes. This arrangement also permits selective rapid cell removal for replacement or servicing. The connector block also includes electrically conductive elements which electrically connect the fuel cells in a desired interconnection, which may be serial, parallel, or mixed. The cells are also provided with keyed members for interlocking with a support tray (45) having cof-itting keyed elements (41). Lateral end elements extend between the connector block and support tray to complete and open enclosure. Air is circulated through a duct (50) defined by the connector block.
Abstract:
A refuelable and rechargable metal-air FCB based power supply unit for integration into a device/system for generating and providing electrical power to at least one electrical-energy-consuming load device disposed therein. An external power source is used to recharge the metal-air FCB subsystems embodied therein. A control subsystem automatically transitions between discharging mode (wherein at least one metal-air FCB subsystem supplies electrical power to the electrical power-consuming load device) and a recharging mode (wherein the external power source is electrically coupled to at least one metal-air FCB subsystem to thereby recharge the metal-air FCB subsystem(s). The metal-air FCB subsystem(s) are refueled by manually loading and unloading metal-fuel from the metal-air FCB subsystem(s). Preferably, electrical power provided to the at least one electrical power-consuming load device is supplied solely by electrical power generated by discharging metal-fuel in the metal-air fuel cell battery subsystem(s). In addition, the metal-air FCB subsystem(s) preferably has a modular architecture that enable flexible and user-friendly operations in loading of metal-fuel, unloading of consumed metal-fuel, replacement of the ionic-conducting medium, and replacement of the cathode.
Abstract:
A method of forming a plurality of thin strips of semiconductor material includes cutting a wafer having a thickness K from a semiconductor boule. The wafer is masked to form a plurality mask lines of a thickness associated with the desired thickness of the thin strips of semiconductor material. The wafer is etched to form plateaus of semiconductor material beneath the mask line having heights associated with the desired width of the thin strips of semiconductor material. The plateaus are removed thereby providing thin strips of semiconductor material.
Abstract:
In general, a system and method of the present invention include a seed material (for receiving deposited carbon atoms) is provided with an active edge, for instance, at a growth line. A form of carbon is provided from a suitable source, and it is deposited upon the edge generally in a deposition region. The growth line is a position where the portion of the seed attracts the materials for growth. The source is activated to produce carbon (C, C2, other C forms) in a form that has a sufficiently low activity so that it will bond to the active edge (as opposed to oxidizing into other molecules such as carbon oxides). As the carbon material is deposited (i.e., atomically bonded) to the edge, the seed material may be pulled at a desired rate, i.e., to "grow" carbon material in the form of a sheet, ribbon, roll, tube, or many other desirable forms as described further herein.
Abstract:
A nozzle structure is provided comprising a monolithic body having an array of nozzles. The nozzles having openings (360) with sectional openings having heights of about 100 nm or less. The nozzles are generally associated with one or more well structures (330).
Abstract:
A method for fabricating multi layer active devices on a bulk substrate is disclosed. Multi layer microelectromechanical and microfluidic devices are fabricated on a substrate with layers of predetermined weak and strong bond regions where deconstructed layers of devices at or on the weak bond regions. Multi layer integrated circuits are fabricated on a substrate with layers of predetermined weak and strong bond regions is disclosed. An arbitrary number of layers can be bonded and stacked to create a predetermined device on the substrate. Also disclosed are methods of creating edge interconnects and vias through the substrate to form interconnections between layers and devices thereon.