Bipolar plate for fuel cells and the method of forming the same
AssigneeChung-Hsin Electric & Machinery Mfg. Corp.
InventorsChe-Jung HSU, Chih-Hung LEE
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Abstract
A bipolar plate for a fuel cell is provided. The bipolar plate is formed by pressing a base plate, wherein the base plate is formed by a soft graphite plate. The soft graphite plate has a density of 0.8-1.3 g/cm3, a carbon content more than 98% and an ash content less than 2%. Based on the thickness of the base plate before pressing, the thickness compression ratio of the bipolar plate is 40-50%.
Claims12
A bipolar plate for fuel cells, wherein the bipolar plate is formed by pressing a base plate, and the base plate is formed from a soft graphite plate, wherein the soft graphite plate has a density of 0.8-1.3 g/cm3, a carbon content more than 98% and an ash content less than 2%, and based on a thickness of the base plate before pressing, a thickness compression ratio of the bipolar plate is 40-50%.
A method of forming a bipolar plate for fuel cells, comprising:
- a die-cutting step of cutting a soft graphite plate into a base plate;
- a matching step of placing the base plate in a mold;
- a pressing step of pressing the mold with the base plate in place;
- and
- a demolding step of detaching the pressed base plate from the mold to obtain the bipolar plate, wherein the soft graphite plate has a density of 0.8-1.3 g/cm3, a carbon content more than 98% and an ash content less than 2%, and based on a thickness of the base plate before pressing, a thickness compression ratio of the bipolar plate is 40-50%.
Dependencies are inferred from the claim text.