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BQ34Z100-G1: Can I use this part for 2S, 3P cell configuration

Karthik B
Expert 1300 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQ40Z50-R2, EV2400, BQ34110, BQSTUDIO, BQ34Z100EVM, GPCCHEM

Hi,

Can I use bq34z100-G1 fuel gauge for 7.4V,10Ah battery capacity, with 2S,3P configuration(image attached for your reference).

Is there any Linux drivers available for the above part, Please suggest?

Regards,

KarthikCell Organisation_1.2.pptx

  • 0
    TI__Mastermind 25955 points
    Hi Karthik,

    Yes, this gauge will work in this configuration as a system side or pack side gauge. If designing a pack side gauge where each series string of parallel cells in the stack may be monitored individually, the bq40z50-R2 should also be considered.

    Linux drivers are not available for the bq34z100-G1, however, it can be communicated with via i2C.

    For more information on communicating with i2C peripherals in linux, please refer to: www.kernel.org/.../i2c.html

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    Expert 1300 points
    Dear Bryan,

    Thanks for your reply.
    I didnt get the point with "system side or pack side gauge",could you explain it.

    Let me out in simple words, this gauge will be in the PCB where I2C signals are connected to the i.mx6 processor and the battery will be connected through the connector which will power uo the entire PCB , and the battery status need to be continuously to the processor and that value is displayed in the LCD (similar to that in the mobile phone). If this is refered to as system side?

    Please suggest.

    And how the initial new IC is programmed is it via EV2400 kit?
    whether this kit is really required to program the fuel gauge?
    Can I get the EV2400 kit in rental basis, just for prototype testing?
    In case of production we will purchase EV2400. Please suggest.

    Regards,
    Karthik
  • 0 in reply to Karthik B
    TI__Mastermind 25955 points
    Hi Karthik,

    By pack side, the gauge would be included inside the battery pack. This is common when the cells are individually monitored and/or protected by a gauge/gauge+protector.

    A system side gauge may also have the wires pulled out for each cell, but this design is less common than a standard +/- wires or tabs. The system side gauge is usually not part of the battery, but instead of the system the battery is attached to.

    If you have multiple cell connections available in your design, another gauge such as the bq40z50-R2 may be preferable.

    However, if you have a +/- lead from the battery (such as your connector), the bq34z100-G1 may be a better fit.

    From your description, it sounds like a system-side capable gauge such as the bq34z100-G1 or bq34110 would be the preffered component for this application.

    >> Let me out in simple words, this gauge will be in the PCB where I2C signals are connected to the i.mx6 processor and the battery will be connected through the connector which will power uo the entire PCB , and the battery status need to be continuously to the processor and that value is displayed in the LCD (similar to that in the mobile phone). If this is refered to as system side?

    Yes, this can be system side.

    >> And how the initial new IC is programmed is it via EV2400 kit?
    Yes. The firmware comes on the device, but the ev2400 is used to program the data memory configure the gauge.

    >>whether this kit is really required to program the fuel gauge?
    Yes, it is required to create the golden image, which may then be programmed via other means in production.

    >>Can I get the EV2400 kit in rental basis, just for prototype testing?
    I'm sorry, there is no EV2400 rental system through TI.

    >>In case of production we will purchase EV2400. Please suggest.
    To configure the gauge bqStudio + EV2400 + bq34z100EVM is the preferred development toolchain. For quick start instructions, please refer to this app note: www.ti.com/.../sluubv2

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    Expert 1300 points

    Hi Brayan,

    Thank for your kind support.

    For Initial prototyping only 5 No of IC is required to program only 5 IC , purchasing EV2400 kit will be costly for us just for prototypes.If there is no rental basis for this kit then we must look for different chip which handle automatic characterization of the battery . And no these kind of flashing can be avoided.

    Does TI have such kind of IC , where no characterization is required please suggest?

    Regards,

    Karthik

  • 0 in reply to Karthik B
    TI__Mastermind 25955 points
    Hi Karthik,

    Although the toolchain is highly recommended, the device can be configured without the EV2400 using a device capable of reading/writing I2C.

    The batteries associated with chemIDs have already been characterized by TI. Please use the free GPCCHEM tool to determine which chemID best matches your cell.

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    TI__Mastermind 25955 points
    Hi Karthik,

    Haven't heard back since this answer was suggested - hope the issue is resolved. If not, please let us know.

    If this answer resolved the issue, please hit the green 'resolved' button to help improve question/answer searchability on the forums. Thank you!

    Sincerely,
    Bryan Kahler