• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 721 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

EM1402EVM: Balancing within the battery pack

Anisha S
Prodigy 40 points
Part Number: EM1402EVM

I'm working on design of BMS with active cell balancing, referring to design guide TIDA-00817.

1.In the design, the charge is being exchanged between cell and external 12V battery. Can we alter the design of DC-DC converter to exchange charge between cell and stack? 

2.I went through the design of EM1401 as well. But two bidirectional controllers are being utilised. Why is that required? Why can we not work with one dc-dc converter?

3.Is it possible to balance multiple cells simultaneously with one converter ? If No, why not?

  • 0
    TI__Genius 11480 points
    Hi Anisha,

    1) Yes, this is most definitely possible! Your magnetics will change a little, primarily your transformer. If you follow the guidance in the datasheet that should be a good place to start.

    2) The EM1401 can also balance module to module if I remember correctly

    3)Unfortunately, I do not think this is possible. There is communication between the EMB1428 and EMB1499. It is likely that there will be faults if you try to have multiple EMB1428 communicate to a single EMB1499. I have seen multiple cells balanced at once, but it requires an extra DC-DC.
  • 0 in reply to David Wiest Jr
    Prodigy 40 points
    Thank You David.

    In one of the queries, someone had mentioned there is no balancing between modules in EM1401, as each EMB1428 has separate EMB1499 for balancing. Can you clarify that?
  • 0 in reply to Anisha S
    TI__Genius 11480 points

    Hi Anisha,

    Oops, that should be correct. I was mistaken and I apologize for that. Thank you for keeping me honest!