Patent ID: 8148033
Filing Date: 2012-04-03
Classification: H01M,Y02E,Y02T

Abstract:
1. A fuel cell system comprising: a fuel cell; a compressor for supplying an oxidant gas to the fuel cell, having a first rotational speed region within which as a rotational speed increases, a noise becomes greater than a predetermined value, and a second rotational speed region within which as the rotational speed increases, the noise becomes equal to or less than the predetermined value; and means for controlling the compressor by calculating a command rotational speed for commanding the compressor based on a required amount of power generation, wherein the means for controlling the compressor prohibits the compressor from rotating at a rotational speed within the first rotational speed region, and when the command rotational speed within the first rotational speed region is calculated, the command rotational speed is changed to a rotational speed within the second rotational speed region which is above the first rotational speed region, or the command rotational speed is changed to a rotational speed within the second rotational speed region which is below the first rotational speed region; and means for controlling power generation of the fuel cell; a battery for charging/discharging an electric power generated by the fuel cell; means for detecting a SOC of the battery; and means for controlling the charging/discharging of the battery, wherein when the command rotational speed within the first rotational speed region is calculated, if the SOC detected by the means for detecting is less than the first SOC, the means for controlling the compressor changes the command rotational speed to the rotational speed within the second rotational speed region, the means for controlling the power generation allows the fuel cell to generate more electric power, and the means for controlling the battery allows the battery to be charged with an excess electric power of the fuel cell.