A method and system are provided for measuring impedance and voltage characteristics of individual cells of multi-cell electrochemical devices, for example a battery or a fuel cell stack. The electrochemical system comprises a plurality of cells; a measuring device including a plurality of inputs connected...http://www.google.ca/patents/US7425832?utm_source=gb-gplus-sharePatent US7425832 - System and method for measuring internal resistance of electrochemical devices
