Energy storage soc and soe

What is the difference between SOC and SOE?

SOC, or State of Charge, is the percentage value that indicates the battery's state during the charge and discharge process as compared to its full-charge state. SOE, or State of Energy, indicates the energy state in the battery. Although they are related, they are not the same.

Can SOC and Soh be used in energy storage applications?

An experimental comparison between SOC and SOH estimation performed by suggested and standard methods is able to confirm the consistency of the proposed approach. To obtain a full exploitation of battery potential in energy storage applications, an accurate modeling of electrochemical batteries is needed.

How is State of Energy (SoE) calculated?

But a more valid way to calculate SoE is by taking the area of the State of Charge (SOC)-Open Circuit Voltage (OCV) Curves, multiply it with the nominal capacity, and then divide the result by the total area of the SOC-OCV curve multiplied by the nominal capacity. With this method, a 5% change in SoE would not be the same as a 5% change in SoC.

What are the critical aspects of energy storage?

In this blog, we will explore these critical aspects of energy storage, shedding light on their significance and how they impact the performance and longevity of batteries and other storage systems. State of Charge (SOC) is a fundamental parameter that measures the energy level of a battery or an energy storage system.

What is a battery SOE?

The battery SOE provides more useful EV driving range information. SOE can be defined as the residual available energy to the maximum available energy (EA) and mathematically expressed as follows: (13) SOE t = SOE t 0 − 1 E A ∫ t 0 t V t t I t dt where, SOE (t0) is the SOE at the time t0.

How is a SOE estimated?

The SoE is estimated based on a mathematical relationship between the SoE and the estimated OCV. The methods benefit from a low complexity but may suffer accuracy, especially for dynamic, real operations.