Şarj Durumu (State of Charge, SoC) Nedir?

Şarj durumu (state of charge, SoC), aküde kalan elektrik enerjisinin bir göstergesidir. Yüzde 30 deşarj olmuş bir akünün SoC değeri yüzde 70’dir.

Kaynak:Yrd. Doç. Dr. Vehbi Bölat, “Aküler, Temel Kavramlar ve Dikkat Edilecek Hususlar”.

State of Charge (SOC): A key parameter in the electric vehicle is the SOC of the battery. The SOC is a measure of the residual capacity of a battery. To define it mathematically, consider a completely discharged battery.

Typically, the battery SOC is maintained between 20 and 95%.

A common mistake that people may make about a battery’s charge is that when a battery “goes dead,” the voltage goes from 12 to 0 V (for a 12 V battery). In reality a battery’s voltage varies between 12.6 V with a SOC of 100% to approximately 10.5 V with a SOC of near 0%. It is advised that the SOC should not fall below 40%, which corresponds to a voltage of 11.9 V. All batteries have a SOC vs. voltage curve which can be either looked up from the manufacturer’s data or determined experimentally. An example of an SOC vs. voltage curve of a lead acid battery is shown in Figure. Note that for a lithium-ion battery, the curve may be much flatter, especially for the mid-SOC range of 40–80%.