Abstract: The present invention provides fuel cell stacks comprising effective means to maintain the fuel cell stacks at a constant temperature using plates mated to at least one face of the stack and in contact with the edges of the repeat and non-repeat layers while making use of the phase change of working-fluids such as water or water-organic species mixtures for heat transfer. Also provided are processes for maintaining said fuel cell stacks at a constant temperature by adjusting the flow rate and pressure of the cooling fluid so that both liquid and vapor are present at the same time.

Abstract: Systems and methods for controlling a temperature of a plurality of batteries of a vehicle are described. The systems and methods may transfer heat from a fuel cell system to the plurality of batteries of the vehicle. The heat produced by the fuel cell system may be transferred to the plurality of batteries through at least one heat transfer system.

Abstract: A high temperature proton exchange medium (PEM) fuel stack system includes features for enhancing the thermal management of the fuel cell. The fuel cell can include a plurality of membrane-electrode-assemblies (MEA) separated by bipolar plates. The upper and lower edges of the bipolar plates are configured such that a plurality of fins is formed therein. Air can be passed along the fins in the upper edges of the plates and along the fins in the lower edges in opposite directions. A plurality of channels is formed on one or both surfaces of the bipolar plates. The channels extend along a serpentine path. Except for the end plates, hydrogen is supplied to the channels on one side of each plate and air is supplied to the channels on the channels on the opposite side of each plate. Such features keep the fuel cell within acceptable temperature limits during operation.

Abstract: The invention relates to the design and manufacturing of a symmetrical polymer electrolyte fuel cell (the cell module) having two cells arranged in mirror symmetry with respect to a central plane of a non conductive fuel manifold. The symmetrical dual cell configuration allows application of adhesive seals for the innermost fuel electrodes. These seals are formed by gluing two membrane electrode assemblies to the opposing faces of the central manifold. The cell module employed as an array of individual modules, or combined into planar or stacked fuel cell configurations.

Abstract: A remote surveillance system (the system) of the present invention is designed to have a long independent operation, portability, and wireless transmission of digital data from any location worldwide. The system includes a hybrid power element having novel hydrogen storage and generation device, light weight polymer electrolyte membrane (PEM) fuel cell, and the low power and low weight electronics. The system also includes multiple day/night cameras, motion detector, global positioning system (GPS), and wireless module. The system is packed in a back pack case and is easily carried between multiple locations due to low weight and compacts size.