BIPOLAR PLATE USING A SECONDARY FLOW CHANNEL FOR A PEM FUEL CELL

摘要

A bipolar plate for a PEM fuel cell inserted with a secondary flow channel is provided to improve reaction uniformity by locally injecting the fresh reaction gas in the performance-decreased area of a fuel battery and to prevent the local degradation of water discharge. A bipolar plate(1) for a PEM fuel cell inserted with a secondary flow channel supplying reaction gas through a gas diffusion layer includes a bipolar plate carved with a flow channel, gas diffusion layer, catalyst layer and electrolyte membrane. A plurality of skew flow channels(12) is formed by forming a plurality of partitions(11) in the bipolar plate parallely. A secondary flow channel(14) is installed with a secondary partition(13) connected to the bipolar plate after being fractionized from the partition having the shortest skew section among a plurality of inlet partitions forming the skew flow channel. The reaction gas is supplied through the secondary flow channel additionally.