Patent ID: 8531158
Filing Date: 2013-09-10
Classification: H01M,Y02E

Abstract:
1. Method for monitoring a lithium-ion battery cell, comprising: monitoring a battery cell voltage and a corresponding state of charge of the battery cell during an electric power event; determining a measured potential-derivative by differentiating the battery cell voltage in relation to the corresponding state of charge of the battery during the electric power event; comparing the measured potential-derivative with a preferred anode potential-derivative of an anode curve; comparing the measured potential-derivative with a preferred cathode potential-derivative of a cathode curve; determining a first state of health parameter of the battery cell corresponding to the comparison of the measured potential-derivative with the preferred anode potential-derivative of the anode curve; and determining a second state of health parameter of the battery cell corresponding to the comparison of the measured potential-derivative with the preferred cathode potential-derivative of the cathode curve.