The bq34110 CEDV Battery Gas Gauge provides CEDV gas gauging and End-Of-Service (EOS)
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 bq34110 gas gauge supports multiple battery
chemistries, including Li-Ion and LiFePO4, lead acid (PbA), Nickel Metal Hydride (NiMH), and Nickel
Cadmium (NiCd).
The gas gauging function uses voltage, current, and temperature data with Compensated
End-of-Discharge Voltage (CEDV) technology to provide State-Of-Charge (SOC) and State-Of-Health
(SOH) data. The gas gauge also incorporates an End-Of-Service (EOS) 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 400-kHz
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.
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