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BQ34Z100EVM: Technical help in selecting an appropriate battery fuel-gauge sensor for research

Part Number: BQ34Z100EVM
Other Parts Discussed in Thread: EV2400, BQSTUDIO, BQ34Z100-G1

Hello,

Our team is currently conducting academic & experimental research on lithium-ion battery charge/discharge cycles and DC generators used to charge them. For our purposes we need to record some battery parameters/data (mainly the state of charge : SOC). The project involves multiple cell battery packs and we want to use a ready-to-go battery fuel gauge sensor to retrieve this data into our system. Currently we are utilizing DAQ systems and recording data using data acquisition cards (such as LabView, arduino etc.). It seemed like one of your TI battery fuel gauge evaluation board EVMs could suit our needs.

There are a few questions here: Would the said FUEL GAUGE or similar, be able to do THAT for us directly or is the EV2400 box necessary? If yes/no, is it still possible to retrieve the sensor data (like SOC) directly from the I2C ports into our DAQ? Are the I2C ports directly readable without a USB?

I understand that you have provided a USB connection and TI software for the PC, but we want to retrieve data independent of that. Hope you can suggest a possible solution to this, or another similar suitable fuel-gauge for our application.

Thanks,

S. KALRA
Research Associate
Nanyang Technological University
Singapore

  • The bq34z100-g1 device has to be properly configured before it can report accurate state of charge readings. A few operations (e.g. programming chemistry id) can ONLY be done with bqStudio and therefore an EV2400 board is necessary since bqStudio has been designed to work with it.
    After the gauge is properly configured,  you can read the state of charge readings via i2c. It can easily be done using any micro-controller or your DAQ system that has an i2c port.
    Andy