Charging_logic.md

YamBMS charging logic

Note

Please read the documentation regarding the charging settings.

Charging Logic Diagram

The charging voltage and current correspond to the default values in the YAML script and can be modified.

Cut-Off Charging Logic Equation

Source: Charging Marine Lithium Battery Banks

Special thanks to @shvmm for deriving the equations.

Note: The equations below can be adopted for other chemistries like Li-ion and LTO with specific CVmin and CVmax values.

Cut-Off Charging Logic Diagram (what's happening in the yellow diamond)

Note: The diagram below is valid for other chemistries like Li-ion and LTO but with other CVmin and CVmax values.

LFP Cut-Off Values

• Nominal : 3.20 V
• CV min : 3.37 V
• CV max : 3.65 V

To enter the Cut-Off phase the only condition is that cutoff_voltage > cv_min.

Li-ion Cut-Off Values

• Nominal : 3.60 V
• CV min : 3.90 V
• CV max : 4.20 V

To enter the Cut-Off phase the only condition is that cutoff_voltage > cv_min.

LTO Cut-Off Values

• Nominal : 2.40 V
• CV min : 2.55 V
• CV max : 2.85 V

To enter the Cut-Off phase the only condition is that cutoff_voltage > cv_min.