Apparatus and method for humidified fluid stream delivery to fuel cell stack

A vehicle fuel cell system comprising:

• a first humidifier configured to receive a cathode fluid stream and to add water thereto from a recirculated fluid stream to provide a first humidified cathode stream, and
• a compressor configured to receive the first humidified cathode stream and to provide a pressurized humidified cathode stream, the compressor for generating a pressure differential across the first humidifier such that membranes in the first humidifier are humidified with the water.

The system of 10 wherein the first humidifier includes a first inlet for receiving the cathode fluid stream, a second inlet for receiving the recirculated fluid stream, and a third inlet for receiving the pressurized humidified cathode stream.

A vehicle fuel cell system comprising:

• a gas-to-gas (G2G) humidifier configured to receive a cathode fluid stream and to add water thereto from a recirculated fluid stream to provide a humidified cathode stream, and
• a compressor configured to receive the humidified cathode stream and to provide a pressurized humidified cathode stream, the compressor for generating a pressure differential in the G2G humidifier such that membranes in the G2G humidifier are humidified with the water.