Patent ID: 9601787
Date: 2017-03-21
CPC Classifications: H01M,Y02E,Y02T

Claim:
1. A fuel cell system, comprising: a fuel cell unit having a fuel cell; a circulating circuit in which coolant circulates to cool the fuel cell; a radiator that is disposed in the circulating circuit and radiates heat of the coolant to outside; a bypass passage that (i) is branched from the circulating circuit at a separating point that is located upstream of the radiator in a flow direction of coolant, (ii) is connected to the circulating circuit at a meeting point that is located downstream of the radiator in the flow direction of coolant, and (iii) makes the coolant bypass the radiator; a three-way valve device that is disposed in the circulating circuit and adjusts a flow ratio of a coolant flowing through the radiator to a coolant flowing through the bypass passage; a pump unit that is positioned downstream of the meeting point in the circulating circuit and makes the coolant circulate in the circulating circuit; and a pressure regulator that is connected to the circulating circuit at a connecting point located upstream of the pump unit in a flow direction of coolant and that regulates a pressure in the circulating circuit to be within a predetermined pressure range that is higher than or equal to an atmospheric pressure at the connecting point, wherein the three-way valve device is disposed upstream of the connecting point in the flow direction of coolant, the three-way valve device has a single valve body that changes an opening degree of a first opening connecting to the radiator and an opening degree of a second opening connecting to the bypass passage, and a total opening area of an opening area of the first opening and an opening area of the second opening in a case where the valve body is positioned at an intermediate opening position to open both the first opening and the second opening is larger than an opening area of one of the first opening and the second opening in a case where the valve body fully opens the one of the first opening and the second opening.