The present disclosure is directed to a method for tuning the performance of at least one electrochemical cell of an electrochemical cell stack. The method includes supplying power to an electrochemical cell stack. The electrochemical cell stack includes a plurality of electrochemical cells. The method further includes monitoring a parameter of at least one electrochemical cell and determining if an electrochemical cell becomes impaired. The method also includes diverting a fraction of the current flow from the impaired electrochemical cell during operation of the electrochemical cell stack.

The present disclosure is directed to a method for tuning the performance of at least one electrochemical cell of an electrochemical cell stack. The method includes supplying power to an electrochemical cell stack. The electrochemical cell stack includes a plurality of electrochemical cells. The method further includes monitoring a parameter of at least one electrochemical cell and determining if an electrochemical cell becomes impaired. The method also includes diverting a fraction of the current flow from the impaired electrochemical cell during operation of the electrochemical cell stack.

An interconnector for an electrochemical module includes a stack of electrochemical cells and interconnectors, each cell being disposed between two interconnectors and in electrical and mechanical contact with the interconnectors, and electrical insulating elements between two interconnectors and surrounding a cell. The interconnector includes at least one intermediate plate received between two end plates defining gas supply and gas collection chambers therebetween. The intermediate plate includes a central region delimited externally by a lateral region having n lateral branch regions, n being at least equal to 1, each lateral extension being configured to be movable towards and to come into contact with a lateral extension of an intermediate plate of a directly adjacent interconnector in the stack, so as to provide electrical conduction between the two interconnectors, the intermediate plate not being covered by at least one of the two end plates at a lateral branch region.

The invention relates to a method for restoring the performance of a vanadium redox flow battery module in a battery system, the method comprising the following steps in the order indicated: identifying at least one degraded battery module; switching off the pumps of the at least one degraded battery module at a time t1; switching on the pumps of the at least one degraded battery module at a time t2; wherein the length of the time interval t=t2t1 is selected such that, at the time t2, a terminal voltage of the degraded battery module is negative, but overcharging of the electrolyte located in the cell assembly of the degraded battery module is avoided, and wherein these steps, with the exception of the first step, take place while the battery system is being discharged.

A redox battery comprises a plurality of redox battery cells stacked in a stacking direction, wherein each of the redox battery cells comprises a first half cell connected to a positive current collector, a second half cell connected to a negative current collector and an ion exchange membrane separating the first and second half cells. The redox battery additionally comprises a positive conducting bus bar extending in the stacking direction and electrically connecting the positive current collectors of the redox battery cells in parallel, and a negative conducting bus bar extending in the stacking direction and electrically connecting the negative current collectors of the redox battery cells in parallel. One or both of the positive and negative bus bars are configured as fastening means for mechanically fastening the stacked redox battery cells in the stacking direction.