How to use the EV Battery State of Charge (SoC) Calculator
The Formula
Resting pack voltage maps to state of charge through the pack OCV curve. This tool uses a linear interpolation between your empty and full voltage endpoints—a planning baseline before applying chemistry-specific lookup tables.
Practical Example
The vehicle BMS blends coulomb counting, temperature compensation, and cell balancing. Voltage alone under load is not reliable—always measure at rest for field checks.
About EV Battery State of Charge (SoC) Calculator
Voltage-based SoC estimation
Resting pack voltage maps to state of charge through the pack OCV curve. This tool uses a linear interpolation between your empty and full voltage endpoints—a planning baseline before applying chemistry-specific lookup tables.
When readings differ from the dash
The vehicle BMS blends coulomb counting, temperature compensation, and cell balancing. Voltage alone under load is not reliable—always measure at rest for field checks.