Hello,
i work with a microgrid that contains a battery and a supercapacitor, i want to estimate the SOC of the battery ( modeled by a DC voltage source with an internal resistance ) according to the Coulomb counting method and therefore i need to select the initial SOC of my battery.\
i take the dimension of my battery from a paper where they say that the rated voltage is 48 V and they took the 28 V (as operational or nominal voltage), so since we use it in 28 V and its rated voltage is 48 V can we say that we use it not fully charged at the initial state ?
and how can i fix for ex my initial SOC at a specified value (50,70%..)
thank you in advance
You have to get the OCV/SOC relationship of the specific battery to correlate Voltage to SOC.
Than you can start with any SOC you want to.
Sarah Kassir you can separate the SoC equation in the first time period from its equation in other time periods as:
SoC0=50,70%*BatteryCapacity
for t=1: SoC(1)=SoC0+(Ech(1)*Etach)-(Edis(1)/Etadis)
for t>1: SoC(t)=SoC(t-1)+(Ech(t)*Etach)-(Edis(t)/Etadis)
t: time period index
SoC0= initial SoC
Ech: Charging energy
Edis: Discharging energy
Etach: Charging efficiency
Etadis: Discharging efficiency
- Badges
- Science topic