Freeze tolerant fuel cell fuel pressure regulator

A fuel cell comprising:

• a fuel cell stack including an anode and a cathode configured to respectively receive a fuel and an oxidant, a manifold in fluid communication with the anode;
• and
• fuel pressure regulator unit mounted on the manifold and including:
• a housing providing a fuel inlet passage, regulated fuel outlet passage, a sense pressure passage, a recycle passage and a mixed fuel passage;
• a pressure regulator provided in the housing and arranged fluidly between the fuel inlet passage and the regulated fuel outlet passage, the sense passage fluidly interconnecting the mixed fuel passage and the pressure regulator, and the pressure regulator configured to regulate the flow of fuel from the fuel inlet passage to the regulated fuel passage in response to a pressure from the sense pressure passage;
• and
• an ejector arranged within the housing fluidly between the regulated fuel outlet passage and the mixed fuel passage, the ejector configured to receive recycled fuel from the recycle passage.