System and method for estimating battery state-of-charge (soc) via hybrid algorithm approach

A battery comprising a battery management unit (BMU), wherein the BMU is configured to:

• determine a state-of-charge (SOC) of the battery during a first interval of time via a voltage look-up algorithm;
• transition from the voltage look-up algorithm to a Coulomb counting algorithm based on battery characteristic data satisfying transition criteria;
• and
• determine the SOC of the battery during a second interval of time after the first interval of time via the Coulomb counting algorithm.

A method comprising:

• determining a state-of-charge (SOC) of a battery via a hybrid algorithm comprising a voltage look-up algorithm component and a Coulomb counting algorithm component;
• transitioning from the voltage look-up algorithm component to the Coulomb counting algorithm component based on battery characteristic data satisfying transition criteria;
• and
• transitioning from the Coulomb counting algorithm component to the voltage look-up algorithm component based on additional battery characteristic data satisfying additional transition criteria.