Laadcurves

Laadcurves are graphical representations of how energy is delivered to a battery during charging. In Dutch-language technical contexts the term is used for curves that plot charging current, charging power, or state of charge against time. They are central to battery design, charging protocol development, and energy-storage operation, including electric vehicles and stationary storage systems. A typical charging curve for lithium-ion cells follows a CC-CV pattern: at the outset a relatively high constant current drives the SOC upward, then, as the cell approaches its voltage limit, the charger switches to a constant voltage and the current tapers down until charging is complete. The overall curve depends on battery capacity, charger power, temperature, and state of health.

Analysts use laadcurves to estimate charging time, evaluate efficiency, and model grid impact. Curves may be plotted for different temperatures, SOC ranges, or chemistries to compare performance. In fast-charging scenarios, the CC phase is shortened and the CV phase dominates the tail of the curve, which can affect heating and degradation if not managed properly.

Applications extend from battery management systems that monitor cell voltages and currents, to consumer charging apps that estimate time-to-full, to grid operators planning demand response. See also charging curve, state of charge, and constant current–constant voltage charging.