I am trying to develop a controller model for Battery charger in Simulink which include both Constant Current and Constant Voltage Method.
I have two separate PI controller for CC & CV charging method. Problem I face is to identify how two controller interact ? i.e. during constant voltage charging if the controller only look at voltage setpoint even if current output is beyond the limits the voltage controller doesn't get affected by it.
How the controlling is done for CC/CV charging of Lithium Ion battery in general ? Will be helpful to get any information.
Thank You.
Sreeraj Arole
There's a good paper that describes the control of CC/CV charging right here on ResearchGate:
Charging algorithms of lithium-ion batteries: An overview
TY - BOOK
AU - Shen, Weixiang
AU - Vo, Thanh
AU - Kapoor, Ajay
PY - 2012/07/01
SP - 1567
EP - 1572
SN - 978-1-4577-2118-2
T1 - Charging algorithms of lithium-ion batteries: An overview
DO - 10.1109/ICIEA.2012.6360973
JO - Proceedings of the 2012 7th IEEE Conference on Industrial Electronics and Applications, ICIEA 2012
ER -
Hi Sreeraj, for battery charging the transition between the two modes is very simple because the battery voltage is always increasing when you charge so let's say you set the CC at 0.5C and CV at 4.2V.
Then you charge controlling the current at 0.5C until the measurement of voltage reach 4.2V, then you start controlling the voltage a 4.2V and the current will naturally decrease. I have practical experience with this so if you need more detail please go ahead and ask.