Flow frame for redox flow battery

A flow frame for a redox flow battery, the frame comprising:

• a frame body having a plate-like shape and an electrode hole in its center where an electrode is to be disposed;
• four through holes disposed at corners of the frame body, respectively;
• a flow channel disposed at a front of the frame body above and below the electrode hole so that two of the through holes diagonal to each other as a pair are connected to each other via the electrode hole;
• through channels disposed at distal ends of the flow channel to cause electrolyte flows toward a rear of the frame body;
• and
• a distribution channel connecting the through channels with the electrode hole at the rear of the frame body,
• wherein the flow channel has at least one branch point, and a change in cross sectional area of the flow channel before and after the branch point is 10% or less,
• wherein the flow channel comprises a first flow channel connected to the through hole and second flow channels connected to the through channels after the branch points, and the second flow channels branch off from the first flow channel, and
• wherein a length of the first flow channel is 80% or more of an overall length of the flow channel.