DETECTING LATENT FAULTS WITHIN A CELL OF AN ENERGY STORAGE SYSTEM

A method of detecting a latent fault of at least one cell among a plurality of cells in an energy storage system, and a control unit performing the method, are provided. A method of a control unit of detecting a latent fault of at least one cell among a plurality of cells in an energy storage system is also provided. The method comprises determining State of Health Cell Capacity, SoHCC, and Open Circuit Voltage, OCV, of a selected cell; wherein the selected cell is indicated to have a latent fault if a determined value of the SoHCC of the selected cell is lower than a reference value for the SoHCC and if a determined value of the OCV of the selected cell is higher than a reference value for the OCV.