Calibrating Smart Batteries with Impedance Tracking
he smart battery was hailed as an engineering marvel when first introduced in 1994 by Intel and Duracell. Unlike a regular battery that is being charged by the algorithm of the charger, the smart battery becomes the host controlling the charge. The heart, or SMBus, which provides state-of-charge (SoC), captures performance data, and detects anomalies, in addition to controlling the charge. To enable accurate data gathering, the smart battery needs periodic calibration to correct errors that occur with normal charge and discharge cycles.
