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Higher Lithium cell count device like bq20z95?

VT
Genius 3300 points
Other Parts Discussed in Thread: TIDA-010030, BQ34Z100-G1, BQ76930, TIDA-01093, BQ76952, BQ76940, BQ78350-R1A, BQ40Z80, BQSTUDIO, BQ78350

1. Do TI have similiar device with higher cell count like bq20z95 (need upto 16 cells), device should have all lithium battery protection features , SOC/SOH calculation etc and TI's software like bqeasy to read/write paramteres just like bq20z95?  

2. Do same things comes in Automotive grade also for EV applications? SOC/SOH calculations must need.

  • 0
    TI__Guru* 78383 points

    Hi VT,

    For 16S with gauging, your best option might be to use 2 x BQ76930 battery monitors with the BQ34Z100-G1 battery gauge. There are two TI reference designs - one that show how to stack the monitor for higher cell count (TIDA-01093) and one that shows how to use the BQ34Z100-G1 for gauging along with the BQ76930 (TIDA-010030). 

    Another option is the BQ76952 (16S battery monitor) which will release very soon. You can use this in combination with the BQ34Z100-G1. There is a video series on this new battery monitor here: https://training.ti.com/training-series-bq76952-bq76942-3-16s-3-10s-battery-monitors

    We do not have automotive grade versions of these devices unfortunately. We do offer a selection of automotive battery monitors, but these do not include gauging.

    Best regards,

    Matt

  • 0 in reply to Matt Sunna
    Genius 3300 points

    Hi Matt,

    1. BQ76930 + BQ34Z100-G1  will have two I2c(SBMUS) ports no?  Bq76930 for individual cell voltage read etc and BQ34Z100-G1  for battery SOC/SOH?

    2. For single output port for reading all paratmers & writing all paramters will bq78350-r1a + BQ76940 (9 to 15 cells) work?

    So that it seems like one complete block like bq20z95, need to read individial cell voltage, SOC/SOH, current, and SBS parameters, same as bq20z95?

  • 0 in reply to VT
    TI__Guru* 78383 points

    Hi VT,

    1. Yes, that is correct. You actually will have 3 devices on the I2C bus (there are two BQ76930 devices). 

    2. BQ78350-R1A + BQ76940 is the easiest solutions for up to 15 cells.

    There is no fully integrated device like BQ20Z95 for very high cell count. The BQ40Z80 is a fully integrated solution for up to 6 cells.

    Best regards,

    Matt

  • 0 in reply to Matt Sunna
    Genius 3300 points

    Hi

    "2. BQ78350-R1A + BQ76940 is the easiest solutions for up to 15 cells."

    Will it have single BQeasy screen to setup and read all parameters like Individual cell voltge, current, SOC/SOH? 

    Dont want to integrate any separate MCU, looking for complete solution, it could have more IC thats not an issue, but complete set with all the paramters.

  • 0 in reply to VT
    TI__Guru* 78383 points

    Hi VT,

    This device uses BQStudio software which is used for all newer battery gauge devices. If you download the BQ76940 EVM User Guide, it will show how to set up and use this software. BQStudio can be used to read all parameters and to set all of the configuration registers. It also has multiple debug tools for calibration, data logging, etc.

    There is no need for a separate MCU. The BQ76940 and BQ78350 are designed to work together and there is just one BQStudio screen.

    There is a video showing some of the capabilities of this software here: https://training.ti.com/introduction-battery-management-studio-bqstudio

    Best regards,

    Matt