The fuel cell unit includes: a fuel cell stack; a cell monitor configured to detect voltage or current of the fuel cell stack; wire harness configured to connect the fuel cell stack and the cell monitor to each other; a power conversion unit configured to include a switching element and to perform conversion of output power of the fuel cell stack or conversion of supplied power to auxiliary machines used for operation of the fuel cell stack by using the switching element; and a bulkhead part that is made of metal and is configured to partition the wire harness and the power conversion unit from each other, the bulkhead part being grounded, wherein the wire harness and the power conversion unit are placed next to each other with the bulkhead part interposed therebetween. Thus, it becomes implementable to downsize the fuel cell unit while satisfying both the prevention of physical contact between the wire harness and the power conversion unit and the suppression of influences of switching noise on analog data.

A process for starting a PEM fuel cell module includes blowing air through the cathode side of the module using external power. An amount hydrogen is released into the anode side of the module under a pressure greater than the pressure of the air on the cathode side, while the anode is otherwise closed. Cell voltages in the module are monitored for the appearance of a charged state sufficient to start the module. When the charged state is observed, the module is converted to a running state.

The invention relates to a fuel processor component for a propylene glycol fuel processor, comprising at least one housing (G) having at least two inlets (E1, E2) and two outlets (A1, A2), wherein there is a multitude of first plates (P1) having a first side (S1) and a second side (S2) and second plates (P2) having a third side (S3) and a fourth side (S4) arranged as a stack in the housing (G), wherein the stacked first and second plates (P1, P2) form at least first cavities (H1) and second cavities (H2), wherein the first inlet (E1) has fluid connection to the first outlet (A1) via first cavities (H1) and the second inlet (E2) has fluid connection to the second outlet (A2) via second cavities (H2). The invention further relates to a propylene glycol fuel processor.

A cell monitor connector is inserted with a first surface following a guide portion. When the cell monitor connector is further inserted, the cell monitor connector makes contact with a projection portion. In a state where the attachment is completed, the projection portion is elastically deformed so as to press a second surface. Due to this force, the cell monitor connector is held such that it is sandwiched between the projection portion and the guide portion.

A stop control method for a fuel cell system of a vehicle can include: determining whether a fuel cell of the fuel cell system is shut down when a key-off signal is received; comparing a voltage of the fuel cell with a first set voltage when it is determined that the fuel cell is not shut down; controlling a voltage of a high-voltage terminal downwardly when the voltage of the fuel cell is larger than the first set voltage; turning on a cathode oxygen depletion (COD) relay a first time after controlling the voltage of the high-voltage terminal downwardly; turning off a high-voltage terminal relay a first time after turning on the COD relay, the high-voltage relay disposed between the fuel cell and the high-voltage terminal; and shutting down the fuel cell and performing key-off control after turning off the high-voltage terminal relay.

A vehicle installation structure for a fuel cell stack that includes: a framework member disposed at a vehicle lower side; a fuel cell stack that is disposed at a vehicle front section or a vehicle rear section, and that is elastically supported by the framework member via a vibration isolating member; and a drive motor that is disposed at a same section of the vehicle front section or the vehicle rear section as the fuel cell stack, that is separate from the fuel cell stack, and that is elastically supported by the framework member via a vibration isolating member such that a height position of at least one of an upper end, a lower end, or a height direction center of the drive motor is disposed between a height position of an upper end and a height position of a lower end of the fuel cell stack.

A fuel cell stack includes: a stacked body including unit cells stacked; end plates sandwiching the stacked body in a stacking direction in which the unit cells are stacked; a tension plate fastening the end plates; and fixing mechanisms fixing the tension plate to the end plates.

A fuel cell separator (first and second separators) of a fuel cell stack is formed in a plate shape, and includes a passage bead (projection) configured to form a seal that prevents leakage of fluid. The passage bead is formed integrally with a surface of the separator in a manner so as to project from the surface, and when viewed in cross section, is formed in a multistage trapezoidal shape.

A fuel cell stack array is disclosed. The fuel cell stack array includes a first fuel cell stack having a first upper frame structure formed with a first through-hole for exposing a first topmost connector layer positioned at top of a first single cell stack structure, a second fuel cell stack having a second upper frame structure formed with a second through-hole for exposing a second topmost connector layer positioned at top of a second single cell stack structure, and a first current collector electrically connecting the first and second topmost connector layers via the first and second through-holes.

The invention relates to a method for impressing an electrical alternating signal in an electrochemical energy supply device (1) by means of a control device (2), in which method a coupling capacitor (C.sub.k) is connected in series between the control device (2) and the energy supply device (1) during the duration of the signal impression operation comprising the following steps which are executed by the control device (2): a) outputting an output signal (S.sub.out) corresponding to the alternating signal to be impressed, for impression into the energy supply device (1), wherein the output signal (S.sub.out) is determined based on at least one setpoint (S.sub.set), which is set by the control device (2), of the alternating signal to be impressed; b) detecting an actual signal (S.sub.act) which corresponds to the output signal and which is applied to the energy supply device, c) comparing the actual signal (S.sub.act) with the setpoint (S.sub.set) of the alternating signal to be impressed and d) controlling the output signal (S.sub.out) in order to minimize the deviation between the actual signal (S.sub.act) and the setpoint (S.sub.set) of the alternating signal to be impressed.