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BQ28Z610: gas gauge for single cell LiFePO4

Paul Antunes
Intellectual 2590 points
Part Number: BQ28Z610
Other Parts Discussed in Thread: BQ34110

Dear BGP team,

I have a new request from customer who wants to design new product with battery integrated, single cell (LiFePO4).

Battery is used in back-up to maintain power supply in case of a power failure and to deliver extra power in case of heavy load (power supply not sized to deliver peak current). Battery is allways connected to the load. It is also always connected to the charging circuit .

What would be the best algorithm to track the battery capacity?

Does impedance tracking require to measure the open cicuit voltage?

Could you please recommend a suitable fuel gauge? BQ28Z610 sounds good fit, pls confirm.

thanks

paul

  • 0
    TI__Mastermind 49201 points

    Hi, Paul,

       Our gauge part bq34110 is the best one for your customer's need; it's the best for all systems power backup, like UPS, energy storage, building security asset tracking and emergencybBattery power modules.

      It has following mayjor features:

    1• Accurate End-Of-Service (EOS) Determination for

    Batteries in Rarely Discharged Applications

    • Compensated End-of-Discharge Voltage (CEDV)

    Gas Gauge for Single- and Multi-Cell Batteries,

    Providing

    – State-Of-Charge (SOC)

    – Time-To-Empty (TTE)

    – State-Of-Health (SOH)

    – Watt-Hour–Based Charge Termination

    • Supports Voltages up to 65 V, Capacities up to

    32 Ah, and Currents up to 32 A—with Options to

    Extend Beyond These Levels Using Scaling

    • Supports Li-Ion, LiFePO4, Lead-Acid (PbA),

    NiMH, and NiCd Chemistries

    • Dual Configurable Host Interrupt or GPO

    • Lifetime Data Logging Options

    • Precision Coulomb Counter, Voltage, and

    Temperature Measurement

    • Power Enable Control

    • I2C™ Communication with Host

    • Accumulated Charge Coulomb Counting with

    Configurable Interrupt

    • SHA-1 Authentication