| 摘要 |
The present invention relates to a system and method for controlling operation of a fuel cell system having a secondary cell, and more particularly to a system and method for maintaining stable output power of a fuel cell system. The fuel cell system includes a fuel cell stack for producing power using an electrochemical reaction between fuel and an oxidizer and a secondary cell for storing and discharging power. The fuel cell system further includes a stack voltage converting circuit for converting a voltage produced by the fuel cell stack and for transferring the converted voltage to a load node, where an output terminal of the secondary cell and a load are connected to the load node, and/or a secondary cell voltage converting circuit for converting a voltage discharged from the secondary cell and for transferring the converted voltage to the load node where the output terminal of the fuel cell stack and the load are connected to the load node. In addition, the fuel cell system includes a voltage converting controller for controlling a conversion ratio of the stack voltage converting circuit and/or the secondary cell voltage converting circuit so that a voltage on an output line of the stack voltage converting circuit and a voltage on an output line of the secondary cell respectively a voltage on an output line of the secondary cell voltage converting circuit and a voltage on an output line of the fuel cell stack are the same at the load node. |
