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BQ34Z100-G1: BQ34z100-G1

Anay Joshi
Prodigy 145 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQ34Z100

Hello I am using BQ34z100-G1& EVM 2300 with the BMS studio.

I am using Panasonic NCR18650A cells (3100mAh) in 4S2P combination. 

The remaining capacity, %SOC & discharge currents are displayed correctly on the display ( on the PC screen and on a 5 - led dispaly as well) while the pack is discharged.

But the charging current ( > 3 Amp.) is not displayed, a intermittent current is dispalyed as 488 mA. and the % SOC is not updated realtime and is updated only when the pack voltage reaches full charge voltage ?

 

  • 0
    TI__Genius 14985 points
    Hi Anay,
    It should correctly report current and SOC during the charge, as well. Is this on your own PCB or using the TI bq34z100 EVM?
  • 0 in reply to dMax
    Prodigy 145 points

    I am using my own pcb dMax. tell me something after full discharge are you required to give some 'cooling time'  to the battery before Charging it again ? or you can start immediately for proper display of SOC ?

    Thanks for your reply dMax

  • 0 in reply to Anay Joshi
    TI__Genius 14985 points
    Hi Anay,
    No, there should be no time required between discharging and charging. You should be able to switch immediately between charging, discharging, and relaxing in any order. Did you select a chemID, perform a learning cycle, and configure the dataflash in your fuel gauge to match your design?
  • 0 in reply to dMax
    Prodigy 145 points

    Sorry for late reply dMax yes the chemID is Ok the dataflash is matched.

    this is what i have observed - if the pack is changed then at least a full discharge or charge has to be performed to have correct dispaly of SOC, otherwise the IC retains the earlier SOC value & displays accordingly.

  • 0 in reply to Anay Joshi
    TI__Genius 14985 points
    Hi Anay,
    That's very strange, but if you export the .gg.csv file or .srec file and program it into another pack then you should get accurate results right from the beginning without cycling. It appears that something was learned during your cycling which you hadn't initially configured properly. I'm not clear on whether you performed a learning cycle before your initial test or not, so if not then this sounds like your learning cycle and you are ready to export the .srec to use as your golden file.
  • 0 in reply to dMax
    Prodigy 145 points

    Hi dMax yes you are correct the file needs to be exported for correct reporting of SOC after changing the battery pack (which is usually at a different SOC).

    Thanks for your reply

  • 0
    Expert 2305 points
    hello anay , can you share the details how you performed learning cycle of bq34z100-g1. how do you discharged and charged . what are required steps to perfom regarding this.