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BMS design for 10s2p Li-Ion battery based system.

carlosgdj07
Prodigy 240 points
Other Parts Discussed in Thread: BQ76PL455A-Q1, EMB1499Q, EMB1428Q

Dear all,

I would want to develop a Battery Management System to manage a 10 Series 2 parallel Li-Ion cell pack (37V nominal) which is going to power a Electric Light Vehicle.

I Would want to develop a system which would be able to feature the following:

- To charge the pack from a 42V unregulated power source.

- To perform an active balance algorithm during charge/discharge of the battery pack.

- To have all the standard features for this kind of systems: OVP, OCP, OTP, enable/disable the availability of pack voltage to the system...

- The system must be controlled by a uC host (STM32F103), which is going to perform CAN communication with the resto of the vehicle.

I have checked TIDA-00817 evaluation board as starting point, but I am not sure if it has all the requirements I need...

Has anyone developed anything similar anytime?

Any recommended documentation to read as starting point?

Any reference design to follow?

Thank you and best regards!

  • 0
    TI__Mastermind 19795 points
    Hi Carlos,

    The BQ76PL455A-Q1 seems like a great fit for the battery protection and balancing portions of your use case. TIDA-00817 (see the EM1402 evaluation module to purchase this TI-Design) contains the necessary components for protection and balancing.

    I would highly recommend viewing the documentation associated with this TI design, and that of the components it uses (PL455, EMB1428Q, EMB1499Q) as a starting point. Particularly, deeply understanding the BQ76PL455A-Q1 (communications, schematics, layouts, etc.) will provide you with the best groundwork for understanding the rest of the system.

    For the charging portion, please view our library of chargers available for your use case.

    Additionally, I would recommend checking if active balancing is what is required for your use case, as you can see significant savings in BOM cost with high-current passive balancing.

    Best of luck with your design!

    Regards,
    Vince
  • 0 in reply to Vince
    Prodigy 240 points

    Dear Vince,

    Many thanks for the info. I will check it out and study fundamentals of all the parts included in TIDA-00817 board.

    Best regards,