Fuel battery system and method for controlling quantity of reaction gas supplied

Abstract

The invention provides a fuel battery system and a method for controlling quantity of reaction gas supplied. The quantity of reaction gas supplied can be efficiently controlled while reducing the work. A control unit judges whether or not the atmospheric pressure detected value detected by an atmospheric pressure sensor continues to be out of a range from 0.6 V to 4.48 V for 50 ms or more. If thedetected atmospheric pressure does not continue to be out of the range for 50 ms or more, the detected atmospheric pressure is converted into an atmospheric pressure value and passed through a low-pass filter. Thus, an atmospheric pressure corrected value is outputted. Contrarily, if the atmospheric pressure continues to be out of the range for 50 ms or more, an alternative value of 101.3 kPa.absis outputted as the atmospheric pressure corrected value. Pressure detected values detected by pressure sensors are converted into gate pressure values, respectively. Absolute pressures of the reaction gas in the oxidizing gas piping system and the hydrogen gas piping system are determined by calculation by adding the atmospheric pressure corrected value to the gate pressure values. According to these absolute pressures, the quantity of reaction gas supplied to the fuel battery is controlled.

Description

technical field [0001] The present invention relates to a fuel cell system and a method for controlling the supply amount of reaction gas. Background technique [0002] A fuel cell system uses, as an energy source, a fuel cell that generates electricity through an electrochemical reaction between a fuel gas and an oxidizing gas that are reaction gases. In order to operate the fuel cell efficiently, it is necessary to control the supply amount of the reactant gas supplied to the fuel cell to suit various situations. As a method of controlling the supply amount of the reactant gas, for example, there is a method of installing a pressure sensor on a pipe that supplies the reactant gas to the fuel cell, and controlling the supply amount of the reactant gas based on the detection value of the pressure sensor (for example, refer to The following patent document 1). [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2004-342475 [0004] However, the absolute ...

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Problems solved by technology

That is, in this case, the supply amount of the reactant gas to the fuel cell cannot be efficiently controlled.

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