Systems and methods for adaptive electrochemical cell management

A method for adaptive electrochemical cell management in an energy storage system including a plurality of battery management system (BMS) nodes, the method comprising:

• obtaining a first signal identifying a plurality of hazardous failure mechanisms of a first cell assembly of a first BMS node of the plurality of BMS nodes, the first cell assembly including one or more first electrochemical cells;
• generating a composite hazardous failure value at least partially based on the plurality of hazardous failure mechanisms and respective weights for each of the plurality of hazardous failure mechanisms;
• determining that the composite hazardous failure value does not exceed a threshold value for deactivating the first cell assembly;
• and
• in response to determining that the composite hazardous failure value does not exceed the threshold value for deactivating the first cell assembly;
• selecting, from a plurality of predetermined operating state changes stored in a memory, a first operating state change that is appropriate for mitigating a selected one of the plurality of hazardous failure mechanisms of the first cell assembly, each operating state change of the plurality of predetermined operating state changes being appropriate for mitigating a different respective type of hazardous failure mechanism, and
• controlling a first power converter of a first BMS node controller of the first BMS node to change a state of operation of the first cell assembly according to the first operating state change, to mitigate at least one of the plurality of hazardous failure mechanisms of the first cell assembly, independently of operation of a second power converter of a second BMS node of the plurality of BMS nodes.

A method for mitigating degradation in an energy storage system including a plurality of cell assemblies, each cell assembly including one or more electrochemical cells, the method comprising:

• performing a selection process wherein at least a first cell assembly of the plurality of cell assemblies and a second cell assembly of the plurality of cell assemblies are selected for preventative discharge at different respective times according to a predetermined selection sequence;
• and
• for at least each of the first cell assembly and the second cell assembly, performing a preventative discharge procedure when the cell assembly is selected for preventative discharge, the preventative discharge procedure including:
• increasing a respective power contribution of the cell assembly selected for preventative discharge, and
• decreasing respective power contributions of at least one cell assembly of the plurality of cell assemblies, other than the cell assembly selected for preventative discharge, to compensate for increasing the respective power contribution of the cell assembly selected for preventative discharge.