摘要:
A method of producing a fuel cell stack is disclosed, the method including the steps of compressing the fuel cell stack at a first pressure and compressing the fuel cell stack at a second pressure higher than the first pressure, wherein a shorting resistance of fuel cells in the fuel cell stack is maximized and a durability of the fuel cell stack is maximized.
摘要:
A bipolar plate for a fuel cell is provided that includes a flowfield having an active surface with an inlet region and an outlet region. The active surface of the flowfield is in communication with the inlet region and the outlet region and has at least one flow channel formed therein. The at least one flow channel further has a cross-sectional area at the outlet region that is less than a cross-sectional area at the inlet region. In particular embodiments, the at least one flow channel is bifurcated. A fuel cell stack including a fuel cell and the bipolar plate is also provided.
摘要:
An electrical shorting device for a fuel cell is provided, wherein the shorting device includes an electrically conductive body and an actuator coupled to the conductive body and adapted to selectively position the body between an electrically conductive and a non-electrically conductive position to selectively provide electrical communication between an anode plate and a cathode plate of the fuel cell. The shorting device facilitates electrical shorting of individual cells during the startup and shutdown of the fuel cell to eliminate the electrical potential across a proton exchange membrane that causes a degradation of a catalyst layer disposed on an a surface of an electrode of the fuel cells.
摘要:
A fuel injection nozzle has a tubular body adapted to receive fuel from a fuel line. A restriction member received at the inlet end of the tubular member limits the flow of fuel into the nozzle and is adjustable between minimum and maximum flow rates. The restriction member has an upstream member with a maximum flow orifice through which fuel entering the nozzle passes. A downstream restriction member nests within the upstream member such that a wall of the downstream member is in circumjacent, sliding relationship to a corresponding wall in the upstream member. The downstream member has a minimum flow orifice for establishing the minimum fuel flow into the nozzle and orifices in the wall portion which are blocked by the wall portion of the upstream member in the minimum flow position of the members and are subject to progressive unblocking to thereby establish a flow rate through the nozzle above the minimum.
摘要:
A twist lock for attaching a plastic shell of a thermal probe to a structural member such as a plastic intake manifold of an internal combustion engine in a socket in the structural member. The twist lock includes hooks on the plastic shell which traverse an annular shoulder at the bottom of the socket through notches in the shoulder when the shell is inserted in the socket and which are captured by the shoulder when the shell is rotated in the socket from an unlocked position to a locked position. The twist lock further includes a lug on the shell cooperating with a cam edge on a resilient lip around an open end of the socket to afford tactile representation of the progress of the shell toward and achievement of the locked position and to prevent reverse rotation of the shell from the locked position.
摘要:
A separator plate for a fuel cell is provided, including a substrate having a radiation-cured first flow field layer disposed thereon. A method for fabricating the separator plate is also provided. The method includes the steps of providing a substrate; applying a first radiation-sensitive material to the substrate; placing a first mask between a first radiation source and the first radiation-sensitive material, the first mask having a plurality of substantially radiation-transparent apertures; and exposing the first radiation-sensitive material to a plurality of first radiation beams to form a radiation-cured first flow field layer adjacent the substrate. A fuel cell having the separator plate is also provided.
摘要:
A fuel cell assembly is disclosed that utilizes a water transport structure extending from fuel cell plates of the assembly into fuel cell assembly manifolds, wherein the water transport structure facilitates the transport of liquid water from the fuel cell plates thereby minimizing the accumulation of liquid water and ice in the fuel cell stack.
摘要:
A bead seal structure is disclosed for sealing between plates of a fuel cell system, wherein the bead seal structure militates against a leakage of fluids from the fuel cell system and a cost thereof is minimized.
摘要:
A system for fabricating a radiation-cured structure is provided. The system includes a radiation-sensitive material configured to at least one of initiate, polymerize, crosslink and dissociate with exposure to radiation. At least one radiation source is configured to project a radiation beam toward the radiation-sensitive material. A smart glass device is disposed between the radiation-sensitive material and the at least one radiation source. The smart glass device includes at least one switchable layer selectively operable from an active state to an inactive state. The smart glass device is configured to expose the radiation-sensitive material to a desired exposure pattern when in one of the active state and the inactive state. A method for fabricating the radiation-cured structure is also provided.
摘要:
A method for fabricating a fuel cell component includes the steps of providing a mask having a plurality of radiation transparent apertures, a radiation-sensitive material having a sensitivity to the plurality of radiation beams, and a flow field layer. The radiation-sensitive material is disposed on the flow field layer. The radiation-sensitive material is then exposed to the plurality of radiation beams through the radiation transparent apertures in the mask to form a diffusion medium layer with a micro-truss structure.