Battery-fuel-gauge chip provides 99% accuracy

摘要

Battery-gauge ICsforlith-ium-ion-battery packs have always involved complex algorithms. For example, battery gauges in laptop computers and cell phones measure current, voltage, and temperature and integrate the current over time to find the charge. They must model the cell's reaction to discharge rate, temperature, age, and self-discharge rate, and they must releam the full-charge capacity over time. They also must predict and accumulate the error for all of these numbers.