The State-of-Energy: A New Criterion for the Energetic Performances Evaluation of Electrochemical Storage Devices

Abstract

One simple question always obsesses any designer of an energetic system using electrochemical storage: is the battery able to deliver or absorb the requested power during the requested duration? Even nowadays, the battery's available reserve is considered in terms of quantity of charge (or capacity) Thus, intermediate stages are necessary to get to its energetic and power reserves. The general approach to evaluate a battery's energetic reserve consists into two modeling. One model describes the remaining capacity while the second describes its voltage variations. This global approach makes the final modeling complex and moreover it brings up multiple sources of error. We propose a new approach that allows a direct determination of battery's power and energetic performances directly from a power solicitation profile. It is based on a new criterion: the SOE as for State-Of-Energy.

Accurate Real Time On-Line Estimation of State-of-Health and Remaining Useful Life of Li ion Batteries

“…The interaction of the discharge current and temperature as reflected in the k values can be plotted as shown in Figures 9 and 10, as part of the DoE analysis. Using these values and applying the 2 2 factorial design analysis, we obtain the equations for k 2 and k 3 as given in Equations 3and (4). k 1 is zero as our experiments do not involve high temperatures.…”

“…The important health indexes for LiB have already been discussed extensively [1][2][3][4][5]. State-of-health (SoH), state of charge (SoC), state of energy (SoE), and state of safety (SoS) were discussed in detail for LiB.…”

Semi-Empirical Capacity Fading Model for SoH Estimation of Li-Ion Batteries

“…This, in turn, also decides the SoC and SoH of the batteries [4]. To estimate the maximum distance before the LiBs need to be charged again requires the knowledge of the road conditions ahead and an accurate SoC, and this can be represented by the state-of-energy (SoE) [5,6]. SoE indicates the remaining energy, instead of charge, that can be used from the battery, which describes a more precise state or condition of the battery.…”

On-line remaining energy prediction: A case study in embedded battery management system

“…Ref. [23] presented a new criterion for direct evaluation of the remaining energy which allows a direct determination of battery's power and energetic performances from a power solicitation profile. Based on a combination of electrochemical impedance spectroscopy (EIS) method and charge/discharge curves analysis.…”