Flow Battery SOC

What is battery state of charge (SOC)?

Battery State of Charge (SOC) might sound technical, but it plays a crucial role in determining the success of any battery energy storage project. We unpack what it means to you, how it’s measured, and how to translate a vanadium flow battery’s accuracy into a sustained economic advantage.

What does SoC mean in a vanadium flow battery?

We unpack what it means to you, how it’s measured, and how to translate a vanadium flow battery’s accuracy into a sustained economic advantage. At its core, SOC is a measure of how much charge is stored in your battery at any given time relative to the maximum full amount—your system’s “fuel gauge,” usually expressed as a percentage.

How does the SOC of a battery relate to the voltage?

At different densities of current, the open-circuit voltage of the battery is related to the SOC of the battery, and as the number of cycles increases, capacity decay occurs. Therefore, the data can be obtained through the established mechanism model to estimate the SOC of the battery.

Can battery systems be adapted for SOC estimation?

Additionally, the proposed framework can be easily adapted for SOC estimation in other battery systems, including lithium-ion batteries and the variable-sized batteries used in electric vehicles for SOC estimation under diverse operational conditions and driving patterns. The authors declare no conflicts of interest.