Abstract: A fuel cell system includes a fuel cell stack, a battery system, a power communication line and a power conditioning circuit. The fuel cell stack provides a stack voltage that stays near or below a first maximum voltage. The battery system includes a terminal that is coupled to the power communication line. The power conditioning circuit, in response to the stack voltage, provides a second voltage to the power bus. The second voltage stays near or below a second maximum voltage, and the second maximum voltage is greater than the first maximum voltage.

Abstract: A technique that is usable with a fuel cell stack includes providing a fuel flow and using at least some of the fuel flow to produce power with the fuel cell stack. A request is received to charge a battery. In response to the request, the technique includes determining if the remainder of the fuel flow is sufficient to produce additional power to charge the battery. Based on the determination, the remainder of the fuel flow is used to produce the additional power to charge the battery.

Abstract: An assembly includes a receptacle and a sensor body. The receptacle includes an orifice for receiving the sensor body. At least one tab is located on the receptacle or sensor body to engage a feature such as a notch on the other. The sensor body is adapted to be inserted into the orifice. At least one prominence may be included on the receptacle or sensor body to lift the tab(s) out of the feature to release the sensor body from the receptacle when the sensor body is rotated with respect to the receptacle.