Patent ID: 7682717
Filing Date: 2010-03-23
Classification: H01M,Y02E,Y02T

Abstract:
1. A fuel cell system comprising: a fuel cell that generates an electric power and heat by a reaction of reaction gases; a heat exchanger; a coolant circuit for a coolant between the fuel cell and the heat exchanger; a coolant circulating pump for circulating the coolant in the coolant circuit; a drive motor for driving the coolant circulating pump, the coolant receiving and carrying the heat to the heat exchanger by the coolant circuit, the coolant circulating pump, and the drive motor; and a control unit that controls a rotational speed of the drive motor and changes an upper limit of the rotational speed of the drive motor to control the rotational speed of the drive motor using the upper limit, wherein the control unit determines the upper limit of the rotational speed of the drive motor on the basis of a cooling capacity of the heat exchanger.