How SOC is calculated in the PETLION model?

[steal-the-soul]

Hello, excuse me. The output value of SOC is calculated from values such as voltage and current. However, I do not know which calculation theory is used in the model. I want to know how SOC is calculated in the PETLION model. I hope to get your help,thanks for your answer.

[MarcBerliner]

The SOC is calculated using Coulomb counting, $$\text{SOC}(t) = \text{SOC}(t_0) + \frac{1}{3600} \int_{t_0}^{t} I(t') ~ \mathrm{d}t' ,$$ where $I(t)$ is in units of C-rate.