Question

what is it meant by capacitnace in the equivalent circuit of lithium ion batteries

Answer 1

Equivalent circuit of lithium ion battery from article:

Evaluation of Lithium-Ion Battery Equivalent Circuit Models  for State of Charge Estimation by an Experimental Approach  Hongwen He *, Rui Xiong and Jinxin Fan

RC model

Here Cc represents surface effects of the battery

Cb represents the battery capacity as electric capacitor. (capacitor stores electric charge and is equivalent to a battery)