AC Internal Resistance Measurement of Batteries
Jian Yong Feng, Jian Ping Sun, Zhiwei Li, Yinlai Yang · 2018
The AC internal resistance measurement method of batteries is introduced, which is based on synchronous sampling method by comparing with standard resistance. The improved DFT algorithm is used to eliminate influence of noise. A simulated resistor based on two-stage inductive voltage divider is designed to verify the method. The internal resistance of lithium ion batteries at 1 kHz are measured.