The present disclosure generally relates to systems and methods for using an energy storage device to assist a venturi or an ejector in a fuel cell or fuel stack system.

The present disclosure generally relates to systems and methods for using an energy storage device to assist a venturi or an ejector in a fuel cell or fuel stack system.

A control method and system of a fuel cell electric vehicle stack. The control method comprises obtaining insulation resistance of the stack, comprising at least two sub-stacks connected in parallel; and disconnecting a sub-stack with insulation failure from a DC bus and then causing the stack to enter a failure mode when it is determined that the insulation resistance of the stack is smaller than a first preset threshold. The stack is determined to have an insulation failure when it is determined that the insulation resistance of the stack is smaller than the first preset threshold. The sub-stack with the insulation failure is located and disconnected the sub-stack with insulation failure from a DC bus, and the stack is then caused to run in a failure mode to perform failure protection, avoid deterioration of the insulation failure and burnout of the stack and improve the safety performance of the stack.

In an example implementation, an energy storage device storage system is disclosed. The energy storage device storage system may include an energy storage device enclosure configured to be disposed between a first longitudinal support structure and a second longitudinal support structure. The first and second longitudinal support structures can extend between first and second support structures. The energy storage device enclosure may include one or more slots configured to receive an energy storage device. The one or more slots each include one or more ports configured to provide an electrical connection to the energy storage device. The energy storage device enclosure may further include one or more jammers attached to outer sidewalls of the energy storage device enclosure. The one or more jammers configured to hold the energy storage device enclosure between the first and second support structures.

The electrochemical system includes a plurality of identical fuel cells electrically connected in series and an air supply system configured to supply air to the fuel cells in parallel and to recover air from the fuel cells, the air supply system including an inlet manifold and an outlet manifold each including a common conduit and individual conduits, each individual conduit of the inlet manifold being connected to an air inlet port of a respective fuel cell, each individual conduit of the outlet manifold being connected to an air outlet port of a respective fuel cell and a single air compressor for forcing air to flow through the inlet manifold, the fuel cells and the outlet manifold.

Stacked bodies each formed by alternately stacking power generation cells and separators are fixed to an end plate, the separators each having a flow passage portion, a gas flow-in port, and a gas flow-out port. The end plate includes upper and lower end plates sandwiching the stacked bodies. The stacked bodies are arranged side by side and a first thermal deformation absorbing portion configured to absorb thermal deformation in a direction orthogonal to a stacking direction is formed between the stacked bodies. Fixing means for fixing the stacked bodies to the end plate fix at least outer peripheral portions of the stacked bodies arranged side by side to the end plate.

A cell includes a support substrate that is of a flat plate shape that includes a first principal surface and a second principal surface on an opposite side of the first principal surface and a columnar shape that includes a longitudinal direction and includes a gas flow path in an inside thereof, and a plurality of element parts that are arranged away from one another on the first principal surface and the second principal surface where at least a fuel electrode, a solid electrolyte film, and an air electrode are laminated thereon. The cell includes a first portion that is located on a side of the first principal surface with respect to the gas flow path and a second portion that is located on a side of the second principal surface with respect to the gas flow path. Structures of the first portion and the second portion are asymmetric.

A fuel cell system may include: a fuel cell unit connected to an output terminal; a battery unit connected to the fuel cell unit in parallel: and a controller configured to control the fuel cell unit to maintain an output voltage of the fuel cell unit at an idling voltage which is higher than zero and lower than an output voltage of the battery unit when a target output power is lower than an output power lower limit set for the fuel cell unit.

A fuel cell system may include: a fuel cell unit connected to an output terminal; a battery unit connected to the fuel cell unit in parallel: and a controller configured to control the fuel cell unit to maintain an output voltage of the fuel cell unit at an idling voltage which is higher than zero and lower than an output voltage of the battery unit when a target output power is lower than an output power lower limit set for the fuel cell unit.

Self-refueling power-generating systems and methods of configuring them are provided, which enable operation in a self-sustained manner, using no external resource for water, oxygen or hydrogen. The systems and methods determine the operation of reversible device(s) in fuel cell or electrolyzer mode according to power requirements and power availability, supply oxygen in a closed circuit, compressing received oxygen in the electrolyzer mode, and supplying water or dilute electrolyte in a closed circuit in conjunction with the closed oxygen supply circuit by separating oxygen produced by the reversible device(s) in the electrolyzer mode from the water or dilute electrolyte received from the reversible device(s). Membrane assemblies may comprise a binder and be hot-pressed to enhance their long-term performance and durability.