Patent ID: 9595724
Date: 2017-03-14
CPC Classifications: H01M,Y02E

Claim:
1. A bipolar plate for an electrochemical cell, the bipolar plate comprising: two plate elements; a flow field disposed between said two plate elements and having a flow inlet and a flow outlet for a coolant flowing through said flow field; each of said plate elements having a contact plane for contacting a respective other one of said plate elements and a plurality of first protrusions projecting from said contact plane and facing away from said respective other plate element between said flow inlet and said flow outlet; at least one of said plate elements between said flow inlet and said flow outlet having second protrusions, said first and second protrusions having an aperture formed therein toward said contact plane of said plate elements, wherein flow channels being formed by means of said apertures of said first and second protrusions in that said first and second protrusions of said two plate elements being offset relative to one another such that each of said first and second protrusions only partially overlaps at least one of said first and second protrusions of said respective other plate element; said second protrusions being smaller than said first protrusions, so that said flow channels are constricted or interrupted in a region of said second protrusions; and said second protrusions disposed in a region of a connecting line between said flow inlet and said flow outlet.