Multi-chemistry CEDV battery gas gauge for rarely discharged applications

Texas Instruments’ bq34110 CEDV battery gas gauge provides CEDV gas gauging and end-of-service determination for single and multi-cell batteries. The device includes enhanced features to support applications where the battery is kept fully charged and is rarely discharged, such as found in a wide variety of backup systems. The gas gauge supports multiple battery chemistries, including Li-Ion and LiFePO4, PbA, NiMH, and NiCd. The gas gauging function uses voltage, current, and temperature data with compensated end-of-discharge voltage (CEDV) technology to provide state-of-charge and state-of-health data. The gas gauge also incorporates an end-of-service determination function that alerts when battery capability has degraded and is approaching the conclusion of its usable service. The data available from the gauge can be read by the host through a 400kHz I2C bus. Two alert outputs are also available to interrupt the host or can be used for other functions, based on a variety of configurable options.