Abstract: A circulation pipe for a coolant is connected to a fuel cell. A pump and a heat exchanger are connected to the circulation pipe. A bypass pipe is connected in parallel with the pump. An ion exchanger is connected to the bypass pipe. An electronic cooling device is connected to the bypass pipe on an upstream side of the ion exchanger. The coolant, which is supplied to the ion exchanger, is cooled by the electronic cooling device to a predetermined temperature, so that the ion-exchange resins are prevented from being abnormally heated by the coolant.

Abstract: A first rectangular pipe is connected along a path of an oxidation gas supply pipe that supplies an oxidation gas from a pump to an oxidant pole of a fuel cell. A second rectangular pipe is connected to an oxidation off-gas pipe connected to an outlet of the oxidant pole. A lower surface of the first rectangular pipe is contacted with an upper surface of the second rectangular pipe. A connecting path is provided to the contact surface, and a vapor permeable membrane is disposed at the connecting path. An upper surface of a third rectangular pipe is provided in surface contact with a lower surface of the second rectangular pipe, the third rectangular pipe being provided to a coolant out-pipe connected to a cooling jacket of the fuel cell. Generated water in the second pipe is heated and evaporated by a coolant heated in the third rectangular pipe. The water vapor then permeates the vapor permeable membrane, and is directed inside the first rectangular pipe so as to humidify the oxidation gas.

Abstract: A discharge port is located at a lower portion of the case of a gas-liquid separator. A discharge valve is located at the discharge port. A water retaining portion is located at the bottom of the case. The water retaining portion is located at a position lower than the discharge valve. An upward inclination surface is formed on the bottom of the water retaining portion. The upward inclination surface is inclined upward toward the discharge valve. A downward inclination surface is formed on the bottom of the water retaining portion. The downward inclination surface is inclined downward toward the upward inclination surface. A cover portion is located in an upper portion of the water retaining portion. The cover portion defines a gas passage in an upper portion of the water retaining portion. The gas passage is open at a portion closer to the inlet and connected to the discharge valve.

Abstract: An ion-removing apparatus includes a housing, a first ion-removing unit and a second ion-removing unit. The housing includes an inlet port, a liquid discharge port and a gas discharge port. The first ion-removing unit is disposed within the housing, so that the fluid that has entered the housing via the inlet port flows through the first ion-removing unit. The first ion-removing unit serves to remove a first ion, such anions, contained in the fluid. The second ion-removing unit is disposed within the housing, so that the fluid that has flown though the first ion-removing unit flows through the first ion-removing unit. The second ion-removing unit serves to remove a second ion, such as cations contained in the fluid. The liquid contained in the fluid that has flown through the second ion-removing unit is discharged from the liquid discharge port. The gas contained in the fluid that has flown through the second ion-removing unit is discharged from the gas discharge port.

Abstract: A first rectangular pipe is connected along a path of an oxidation gas supply pipe that supplies an oxidation gas from a pump to an oxidant pole of a fuel cell. A second rectangular pipe is connected to an oxidation off-gas pipe connected to an outlet of the oxidant pole. A lower surface of the first rectangular pipe is contacted with an upper surface of the second rectangular pipe. A connecting path is provided to the contact surface, and a vapor permeable membrane is disposed at the connecting path. An upper surface of a third rectangular pipe is provided in surface contact with a lower surface of the second rectangular pipe, the third rectangular pipe being provided to a coolant out-pipe connected to a cooling jacket of the fuel cell. Generated water in the second pipe is heated and evaporated by a coolant heated in the third rectangular pipe. The water vapor then permeates the vapor permeable membrane, and is directed inside the first rectangular pipe so as to humidify the oxidation gas.

Abstract: A circulation pipe for a coolant is connected to a fuel cell. A pump and a heat exchanger are connected to the circulation pipe. A bypass pipe is connected in parallel with the pump. An ion exchanger is connected to the bypass pipe. An electronic cooling device is connected to the bypass pipe on an upstream side of the ion exchanger. The coolant, which is supplied to the ion exchanger, is cooled by the electronic cooling device to a predetermined temperature, so that the ion-exchange resins are prevented from being abnormally heated by the coolant.

Abstract: A discharge port is located at a lower portion of the case of a gas-liquid separator. A discharge valve is located at the discharge port. A water retaining portion is located at the bottom of the case. The water retaining portion is located at a position lower than the discharge valve. An upward inclination surface is formed on the bottom of the water retaining portion. The upward inclination surface is inclined upward toward the discharge valve. A downward inclination surface is formed on the bottom of the water retaining portion. The downward inclination surface is inclined downward toward the upward inclination surface. A cover portion is located in an upper portion of the water retaining portion. The cover portion defines a gas passage in an upper portion of the water retaining portion. The gas passage is open at a portion closer to the inlet and connected to the discharge valve.

Abstract: A gas-removing device serves to remove impurity gases from the air supplied to a fuel cell via an air supply system. The gas-removing device includes a porous material and an alternate adsorption membrane. The porous material has micropores formed therein in order to absorb impurity gas particles contained in the air. The alternate adsorption membrane is formed on the inner walls of the micropores of the porous material in order to further adsorb and retain at least one type of impurity gas particles from among the impurity gas particles absorbed by the porous material. The alternate adsorption membrane includes at least one positively charged layer and at least one negatively charged layer laid alternately to one another.

Abstract: Fibers usable for an ion exchange filter includes a base material and ion exchange resin particles. The base material is made of a hydrophobic resin. The ion exchange resin particles are embedded within the base material At least some of the ion exchange resin particles are exposed on a surface of the base material.

Abstract: A gas-removing device serves to remove impurity gases from the air supplied to a fuel cell via an air supply system. The gas-removing device includes a porous material and an alternate adsorption membrane. The porous material has micropores formed therein in order to absorb impurity gas particles contained in the air. The alternate adsorption membrane is formed on the inner walls of the micropores of the porous material in order to further adsorb and retain at least one type of impurity gas particles from among the impurity gas particles absorbed by the porous material. The alternate adsorption membrane includes at least one positively charged layer and at least one negatively charged layer laid alternately to one another.

Abstract: An ion-removing apparatus includes a housing, a first ion-removing unit and a second ion-removing unit. The housing includes an inlet port, a liquid discharge port and a gas discharge port. The first ion-removing unit is disposed within the housing, so that the fluid that has entered the housing via the inlet port flows through the first ion-removing unit. The first ion-removing unit serves to remove a first ion, such anions, contained in the fluid. The second ion-removing unit is disposed within the housing, so that the fluid that has flown though the first ion-removing unit flows through the first ion-removing unit. The second ion-removing unit serves to remove a second ion, such as cations contained in the fluid. The liquid contained in the fluid that has flown through the second ion-removing unit is discharged from the liquid discharge port. The gas contained in the fluid that has flown through the second ion-removing unit is discharged from the gas discharge port.