Patent ID: 9065099
Filing Date: 2015-06-23
Classification: H01M,Y02E

Abstract:
1. A fuel cell system having a fuel cell including at least one cell with an electrolyte membrane, the fuel cell system comprising: an index value acquirer configured to obtain a temperature index value correlated to temperature of a short circuit area in each cell; a controller configured to control a control parameter of the fuel cell affecting the temperature of the short circuit area, such that the temperature index value is within a predetermined range set to make the temperature of the short circuit area lower than a decomposition temperature of the electrolyte membrane to keep each cell within the fuel cell generating; and a resistance value acquirer configured to obtain a resistance value of the short circuit area, wherein the controller is programmed to set the predetermined range of the temperature index value, based on the resistance value of the short circuit area, the temperature index value is a voltage value of each cell, and the controller is programmed to determine whether a voltage value at low load of each cell, is reduced from an initial value, makes a comparison between a first characteristic and a second characteristic, controls the resistance value acquirer to reacquire the resistance value of the short circuit area when there is a reduction of a corrected voltage value at low load from the initial value, and updates the predetermined range based on the reacquired resistance value of the short circuit area, the voltage value at low load of each cell is a voltage value of each cell at a specified low load, the first characteristic is an I-V characteristic from low load to high load of a first cell having reduced voltage at low load from the initial value, the second characteristic is an I-V characteristic from low load to high load having unchanged voltage at low load from the initial value, the corrected voltage value is a voltage value of the first characteristic corrected based on a difference in voltage value between the first characteristic and the second characteristic at a specified high load, the specified low load is greater than 0, and the specified high load is greater than the specified low load.