Patent ID: 7067216

Claim:
A bipolar plate gas moisturizing apparatus for a proton exchange membrane fuel cell (PEMFC) formed with a plurality of bipolar plates and membrane electrode stacks, both sides of each of the bipolar plates having a plurality of fuel channels and oxidant channels for a fuel gas and an oxidant to flow through and to have electrochemical reactions via the membrane electrode stacks, wherein the bipolar plate gas moisturizing apparatus is characterized in that: a communication channel being in fluid communications with each of the fuel channels at a middle section of the fuel channels and in fluid communications with a moisturizing main pipe through a permeating channel, the communication channel being located on at least one of the bipolar plates, and the bottom of the communication channel being attached with a layer of water-absorptive material and the permeating channel being filled with the water-absorptive material to supply a moisturizing water inside the moisturizing main pipe to the fuel channel to increase the humidity of the fuel gas therein.