Abstract:
A fuel cell system comprises a fuel cell unit in a housing and comprising an anode part and a cathode part, a hydrogen source for supplying hydrogen to the fuel cell unit, an air supply unit for supplying air to the fuel cell unit, and a catalytic converter for catalytically converting oxygen and hydrogen to generate an inert gas mixture and supplying it to the interior of the housing. The catalytic converter comprises a cathode exhaust gas intake for receiving a cathode exhaust gas from the cathode part of the fuel cell unit. In a method for generating inert gas for a fuel cell system, a purge gas is supplied from the anode part of the fuel cell unit, and/or fresh hydrogen is supplied from a hydrogen supply unit of the fuel cell unit to the catalytic converter, to generate the inert gas mixture.
Abstract:
Some embodiments of the disclosure provide a cathode circulation system of a fuel cell connected to a power generation unit of the fuel cell. The cathode circulation system includes a first gas supply tank for providing an inert gas, a second gas supply tank for providing a reaction gas, a mixing tank connected to the first gas supply tank and the second gas supply tank for mixing the inert gas and the reaction gas, a gas-liquid separator connected to the power generation unit, and at least one cathode gas pump provided between the mixing tank and the gas-liquid separator and between the mixing tank and the power generation unit.
Abstract:
A system and method for cooling and humidifying a cathode subsystem of a fuel cell for an automobile. The system includes a compressor, an air input line including an intercooler configured to cool air output by the compressor, a fluid output line including a fluid injection system, a cathode stack configured to receive air via the air input line and output a fluid to the fluid output line, and an electronic processor. The electronic processor is configured to control the fluid injection system such that the fluid output from the cathode stack is injected into the air input line.
Abstract:
The invention relates to a fuel cell system (1) suitable for operation with a cathode operating gas containing oxygen and inert gas and an anode operating gas containing hydrogen and inert gas; an appliance system operated by means of the fuel cell system (1); and a method for operating the fuel cell system (1). In the method according to the invention, the single components of the operating gases are stored separately, and mixed to the required portions during operation of the fuel cell system, thereby constantly recirculating the inert portion of the operating gases. During operation of the fuel cell system, gases are neither taken in from the environment nor released into the environment nor are fuel cell exhaust gases stored in the fuel cell system or the appliance system. In an alternative variation, only the anode operating gas is mixed and recirculated, while the cathode operating gas and the cathode exhaust gas are taken from the environment and released into the environment, respectively.
Abstract:
Methods of determining concentrations and/or amounts of redox-active elements at each valence state in an electrolyte solution of a redox flow battery are provided. Once determined, the concentrations and/or amounts of the redox-active elements at each valence state can be used to determine side-reactions, make chemical adjustments, periodically monitor battery capacity, adjust performance, or to otherwise determine a baseline concentration of the redox-active ions for any purpose.
Abstract:
A method for measuring an electrolyte balance of a redox flow battery may include: charging the redox flow battery by applying a current to a stack; measuring temperatures of an anode electrolyte solution and a cathode electrolyte solution while the redox flow battery is charged; calculating a temperature change rate of the anode electrolyte solution over time and a temperature change rate of the cathode electrolyte solution over time; deciding a first change time corresponding to an inflection point of the temperature change rate of the anode electrolyte solution over time and a second change time corresponding to an inflection point of the temperature change rate of the cathode electrolyte solution over time; and calculating an average electrolyte oxidation number of the redox flow battery, using the first change time, the second change time, an oxidation number of the anode electrolyte and an oxidation number of the cathode electrolyte.
Abstract:
A flow battery system and method of operating the system minimizes performance losses. The flow battery system includes at least one cell, a first tank including a liquid electrolyte, a pump operably connected to the first tank and to the at least one cell, and a second electrolyte tank operably connected to the at least one cell. The flow battery system further includes a memory including program instructions stored therein, at least one sensor configured to a generate at least one signal associated with a sensed condition of the battery system, and a controller operably connected to the at least one sensor, the pump, and the memory and configured to execute the program instructions to determine a dead zone condition exists based upon the at least one signal, and control the pump to pulse flow of the liquid electrolyte to the at least one cell based upon the determination.
Abstract:
The invention relates to a fuel cell system (1), comprising at least one fuel cell (2), wherein the fuel cell (2) comprises an anode chamber (3) and a cathode chamber (4) separated from the anode chamber (3), and wherein the fuel cell system (1) also comprises a cathode gas source (5), a gas supply line (6), which is connected to the cathode gas source (5), for feeding cathode gas into the cathode chamber (4), and an exhaust air line (7), which is connected to the cathode chamber (4), for the conducting exhaust air out of the cathode chamber (4). According to the invention, the gas supply line (6) and the exhaust air line (7) are connected by means of at least one gas flow regulation element (8, 9), which opens the gas supply line (6) in the direction of the exhaust air line (7) and/or the exhaust air line (7) in the direction of the gas supply line (6) in dependence on an operating status of the fuel cell (2).
Abstract:
Systems and methods for improving conditions for anion contaminant removal in a cathode of a PEMFC system are presented. A fuel cell system consistent with certain embodiments may include a cathode compartment having a compressor coupled thereto. The compressor may be configured to receive an input cathode gas via a compressor input and supply the input cathode gas to the cathode compartment via a compressor output. The fuel cell system may further include a cathode gas recirculation value coupled to the cathode compartment configured to receive a cathode exhaust gas output and to selectively provide at least a portion of the cathode exhaust gas output to the compressor input. Consistent with certain embodiments disclosed herein, the compressor may be further configured to supply at least a portion of the cathode exhaust gas output to the cathode compartment via the compressor output.
Abstract:
Methods and apparatus are provided for fuel cell air filter life prediction. The method for monitoring an air filter comprises receiving data indicating a concentration of a contaminant gas, and receiving data indicating a mass flow rate through the air filter. The method also comprises determining, with a processor, a total mass of the contaminant gas based on the concentration of the contaminant gas and the mass flow rate and calculating, with the processor, a remaining life of the air filter based on the total mass of the contaminant gas and a capacity of the air filter for the contaminant gas. The method comprises outputting notification data to a notification system based on the calculated remaining life of the air filter.