Sodium-nickel chloride battery experimental transient modelling for energy stationary storage

- An in-depth analysis of the NaNiCl2 batteries transient behaviour is presented.
- A general NaNiCl2 batteries modelling approach is proposed.
- Several comparisons between model results and real measures are shown.
- The reaction front position influence on the battery resistance has been analysed.
- A precise NaNiCl2 battery equivalent electrical circuit has been derived.

The paper presents the analysis of Sodium Nickel chloride batteries in transient operation, and proposes a simple but very precise model to represent both the transient and steady battery behaviours. Hence, the main purpose of this model is to foresee the battery voltage during the most important network services, which require very fast transitions from the battery charge operation to the discharge one. In order to validate the model, several comparisons between experimental measures and model results are shown.