Glossary: State of Charge (SoC)

State of Charge (SoC) is a measurement that indicates the remaining energy available in a battery, expressed as a percentage of its total usable capacity.

Expanded Explanation

SoC represents how “full” a battery is at a given moment and is a critical parameter for battery-powered devices. It is typically estimated using voltage measurements, current tracking, and battery models within a Battery Management System. Accurate SoC estimation allows devices to predict remaining runtime, manage power consumption, and alert users before the battery reaches unsafe discharge levels.

Why it matters

Reliable SoC information prevents unexpected shutdowns and supports safe, predictable device operation.

iTECH Context

iTECH designs battery systems with accurate SoC monitoring tailored to application requirements.

Applications

Portable medical devices, industrial equipment, smart battery systems