A fluid detection system and method for a fuel cell power plant is disclosed having a pressure sensor (61, 161) positioned in a fuel cell stack assembly (10) to measure pressure of fluid/liquid in a fluid/liquid flow path (40, 42, 44) therein and to provide a pressure-based signal (90, 63). The pressure-based signal (90, 63) is used to control a liquid management arrangement (53) at least during start-up and shut-down of the cell stack assembly (10) to regulate water level. The liquid management arrangement (53) may include means (50, 51) for controllably applying and releasing a vacuum to a water manifold (44, 54; 100) of the cell stack assembly (10) to regulate water flow and level therein. The pressure-based control of water level may extend across the entire operating range of the cell stack assembly (10), or may be complemented during steady state operation by voltage-based sensors (66, 166).

One embodiment provides a method for predicting maintenance of a redox flow battery, the method including: receiving, from a plurality of sensors, data regarding characteristics of the redox flow battery; weighting, using a processor, each of the characteristics to form an estimated state parameter for the redox flow battery; and determining, using the processor, a maintenance action for the redox flow battery using the estimated state parameter. Other aspects are described and claimed.

A fuel cell system includes fuel cell stacks, each of which includes a plurality of fuel cells that are connected in series and generate electricity through an electrochemical reaction between a fuel gas and an oxidant gas, fuel cell cartridges, each of which has headers that supplies the fuel gas and the oxidant gas to the fuel cell stacks and discharges a fuel off-gas and an oxidant off-gas from the fuel cell stacks, a fuel gas supply line that supplies the fuel gas to the fuel cell cartridges, a fuel off-gas discharge line that discharges the fuel off-gas from the fuel cell cartridges, and a first adjustment member provided in the fuel gas supply line or the fuel off-gas discharge line, and adjusting a flow rate of the fuel gas or the fuel off-gas, the first adjustment member including a first flexible pipe.

To provide a fuel-efficient fuel cell system configured to eliminate flooding in a fuel-based gas flow path, etc. The fuel cell system is a fuel cell system comprising a first fuel cell stack, a second fuel cell stack, a fuel gas supplier, a first supply flow path, a first circulation flow path, a second supply flow path, a second circulation flow path, a first bypass flow path which includes a first on-off valve, a second bypass flow path which includes a second on-off valve, a temperature detector, a current detector, a voltage detector and a controller.

The present disclosure relates to the technical field of energy storage devices, and in particular, to a battery module. The battery module includes a set of batteries, a case receiving the set of batteries, and a sampling unit for collecting a voltage signal and a temperature signal of the set of batteries. The sampling unit is provided with a connector, and a stopper for fixing the connector is formed on the case. By forming the stopper on the case, the connector can be directly assembled to the stopper during assembling process of the set of batteries without the need to fix the connector by glue or bolt connection. Therefore, not only an assembling process is simplified, but also the connector is not easily damaged during the assembling process.

A redox flow battery system includes an anolyte having chromium ions in solution; a catholyte having iron ions in solution, where a molar ratio of chromium in the anolyte to iron in the catholyte is at least 1.25; a first electrode in contact with the anolyte; a second electrode in contact with the catholyte; and a separator separating the anolyte from the catholyte.

A direct isopropanol fuel cell adapted for use in ambient conditions and utilizing as fuel isopropanol and water preferably with isopropanol at relatively high concentrations representing 30% to 90% isopropanol.

Provided is a fuel cell system including: a fuel cell that supplies electricity to a load; a fuel cell converter that is connected between the fuel cell and the load and boosts a voltage output from the fuel cell; and a control unit that causes the fuel cell converter to perform a voltage boosting action and controls output electricity to the load. Upon detecting a voltage boosting disabling failure that is a failure in which the fuel cell converter is unable to perform the voltage boosting action and able to pass a current, the control unit stops the voltage boosting action of the fuel cell converter and passes a current through the fuel cell converter.

A redox flow battery system includes an anolyte; a catholyte; a first half-cell including a first electrode in contact with the anolyte; a second half-cell including a second electrode in contact with the catholyte; a separator separating the anolyte in the first half-cell from the catholyte in the second half-cell; at least one state measurement device configured for intermittently, periodically, or continuously making a measurement of a value indicative of a state of charge of the anolyte or the catholyte before entering or after leaving the first half-cell or second half-cell, respectively; and a controller coupled to the at least one state measurement device for generating a temporal energy profile of the anolyte or the catholyte, respectively, using the measurements.

A redox flow battery system includes a battery cell that performs charge-discharge by supplying an electrolyte; a monitor cell to which the electrolyte is supplied; a voltmeter that measures an open circuit voltage of the monitor cell; a thermometer that measures a liquid temperature of the electrolyte; and a controller that controls the charge-discharge of the battery cell based on the open circuit voltage, and the controller corrects the open circuit voltage in accordance with the liquid temperature.