Abstract:
A fuel cell (100) includes a membrane electrode assembly (110) located together with a layer of porous gas diffusion material (150). The membrane electrode assembly (110) is activated by supplying reactants thereto. The porous gas diffusion material layer (150) operates to selectively limit the amount of reactants reaching localized areas of the membrane electrode assembly (110) in order to reduce hot spots.
Abstract:
Devices (302, 702, 800) with embedded control programs are provided are provided with RF-ID devices (114, 504) or other non-contact read data carriers (604) that provide configuration data, on which the execution of the embedded control programs is contingent. Preferred embodiments include wireless communication devices (302, 702, 800) provided with RF-ID devices (114, 504) or set of magnets (604) that encodes data embedded in front fascia. Embodiments of the invention increase the security of configuration data, and allow for functionality to enhance by replacing the front fascia.
Abstract:
Oxides of carbon and other impurities are removed from a hydrogen fuel supply stream (12) for a fuel cell (30). A getter element (20) sufficient for chemisorbing the oxides of carbon from the hydrogen is removably connected to the fuel cell anode side. The fuel stream is passed through the getter element so as to chemisorb the oxides of carbon onto the getter, thereby providing a purified stream of hydrogen (26) to the fuel cell anode. The getter is removed from the fuel cell when the getter when spent and replaced with a fresh getter.
Abstract:
An apparatus and method for temperature regulation of a fuel cell using differential heat capacity of the fuel storage media is disclosed. The method of regulating the temperature involves measuring the temperature of one or more fuel cells, comparing the temperature against target values, selecting a control method from a set of available control methods based on the result of comparison and using that control method to initiate and control a regulation cycle, and actuating a flow control means using the selected control method to alter the flow of fuel between one or more fuel storage containers, each containing fuel storage media which exhibit different enthalpies of formation and dissociation. The regulation process starts with measuring temperature (110) of a fuel cell system (100). The measured temperature is then compared (120) to a predetermined set of ideal target values designed to provide peak fuel cell performance. Following the comparison step, a control method (130) is selected from a list of available control methods. The control method has the necessary parameters and logic to define an fuel flow initiation process (140) which in turn actuates a flow control means (150). Actuation of the flow control means changes the temperature of the one or more fuel cells and alters its operating parameters (160).
Abstract:
The fuel cells (110) consists of one or more fuel cells (110), each having a major surface (140), and disposed next to each other in a side-by-side adjacent arrangement and a fuel storage container (120) having an exterior wall (150). The fuel cells (110) are positioned such that distance between the major surfaces (140) and the fuel storage container wall (150) along a direction normal to the major surfaces is substantially the same. In addition, one or more of the fuel cells are in thermal contact with the fuel storage container such that cell waste heat is transferred to the fuel storage container. During typical operation, a change in an operational parameter of the fuel cell system such as power output causes a change in the amount of waste heat generated in the fuel cell and the waste heat is transferred to the fuel storage container.
Abstract:
An adaptable mold assembly (10) consists of two mold bases (100, 102). One or both of the mold bases has at least one interchangeable portion (104, 105) removably mounted on the mold base, whose function is to actuate in a direction different from the draw direction. The interchangeable portion is typically used to facilitate the removal of the molded part from the mold, and often functions as a mold slide or pull. The ability to interchange and reconfigure the mold base reduces tooling costs and adds design flexibility to the tool. In another embodiment of the invention, the function of the interchangeable portion (106) is to provide process monitoring, process control or process optimization.