Texas Instruments has developed its first battery management gas gauge for multi-cell lead-acid battery packs.
The bq34z110 gauge uses an impedance tracking for up to a 95% accurate capacity measurement for the entire life of the battery.
The Impedance Track proprietary algorithm uses current, voltage measurements, temperature and battery characteristics to determine battery state-of-charge, state-of-health and capacity.
The gauge supports a range of lead acid batteries (4 V to 64 V), including large capacity batteries (1 Ahr to 65 Ahr and higher) and high-current applications (0 A to 32 A and higher).
TI also introduced the bq34z100 lithium-based multi-chemistry, multi-cell battery gas gauge, which supports a wide range of lithium-ion and lithium iron phosphate chemistries in 1- to 16-cell batteries.
Lead-acid batteries typically behave better than lithium chemistries in environments with wide temperature ranges, but lead-acid battery designs do not accurately measure and report current battery capacity.