Redox flow battery

Abstract

To minimize, at least within a cell string (40, 41), the power limitation of cell strings (40, 41) of a redox flow battery (1, 42) caused by individual cell stacks (10) with insufficient electrolyte (14a, 14b), and thereby increase the overall power and efficiency of the redox flow battery (1, 42), a redox flow battery (1, 42) is proposed which has a fluid distribution system with piping (44a, 44b) comprising distribution pipes (47) branching off from the supply lines (16a, 15b) and collecting pipes (48) leading into the discharge lines (17a, 17b) in order to supply the electrolytes (14a, 14b) to the cell stacks (10, 101, 102, 103) of the stack levels. (45, 46) to supply and discharge from these, as well as inlet lines (49) and outlet lines (50) which connect the individual cell stacks (10, 101, 102, 103) of the stack levels (45, 46) to the distribution pipes (47) or the collecting pipes (50).In this case, at least the inlet lines (49) and / or outlet lines (50) of the piping (44a, 44b) are designed such that during operation of the redox flow battery (1, 42) the cell stacks (10, 101, 102, 103) are subjected to volume flows of the respective electrolytes (14a, 14b) at least within the respective cell string (40, 41), which are equalized and ideally approximately equal in size.