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BQ78412 questions

Michael Rios
Prodigy 10 points
Other Parts Discussed in Thread: BQ78412

Hello,

I had a couple questions regarding the bq78412 IC for SLA battery monitoring. First, If I have two 12V SLA batteries connected in series should I put a bq78412 chip for each one or can I just use one for the string of two batteries? Second, Do I need to the development board to use the bq78412 chip? Or will it be functional without any initial programming via the evaluation board?

Sorry if these questions have already been asked, hope it's not too much trouble.

Thanks,

Michael


  • 0
    TI__Prodigy 60 points

    Michael,

    Thanks for interesting TI BMS products.

    1. Unfortunately, the bp78412 is designed for 12V lead-acid battery and the maximum input voltage is 26V, which is not compatible with two SLAs in series because the max voltage of two 12V SLAs in series may go beyond 26V when charging.
    2. Could you help me to understand your question again? Do you want to use the TI EVM for your product?
      The bq78412 requires some of registers to be initialized to meet your SLA battery spec; however, those registers only need to be initialized once at first time. Once they are initialized, the bq78412 will be functional properly without further initialization. The only thing needs to be considered is initializing SOC every time the bq78412 is powered up. A full charge cycle will set SOC to 100%, however it may take time. Or, the SOC can be set via IrDA/UART.

    Please let us know if you have any questions.

    Zane Zhu