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BQ28Z610: deep discharge test, data looging in BQ-Studio, logging errors

Part Number: BQ28Z610
Other Parts Discussed in Thread: BQSTUDIO

Hi,

our customer is using BQ28Z610 and close to ramp production.

He is facing some issues with the part.

1st:Is it possible to change the deep discharge voltage and is there a other way to get the battery pack up and running without unseal the pack.

Unseal Pack and CHG_FET_TOGGLE after deep discharge test required,

else the pack will be disabled forever, this should not happen too early (or better never):

After discharging the 2 battery cells down to ~4.4V (temporary bridging the FETs) charging didnt work anymore afterwards.

Unseal of Pack and CHG_FET_TOGGLE in bqstudio required

Which setting has to be changed to prevent that? Where is the Undervoltage limit?

 

2nd:

Is there data looging and scripting interface to BQ-Studio:

Long ago (~2010) there was a scripting interface to the old EV2300 Software

https://e2e.ti.com/support/power_management/battery_management/f/180/t/49259

Unfortunately VB6 only not supported any more, that’s real progress in Software, less features.

Can I start bqstudio at least in a mode that that starts logging automatically?

 

Firmware: we have not repgrogrammed the TI eval board, only made a readout to srec file

Where do I get the default srec content for the eval board?

 

I tried Update chemistry (ChemUpdate585.zip) though said successful, I ended up with a empty chemistry window

>       reinstall bqstudio required

 

3rd: data logging BQ-Studio:

 

In BQ-Studio it seems that the data logging does not work reliable with 4 samples

3 of samples produces random log errors, all 4 samples produces some times data glitches.

As a reference I have connected the TI bq28z610 evm, there I see no log errors or data glitches (over one hour).

The connection from the EVM2300 to the battery is as short as possible.

Many Thanks

Best wishes,

Olrik

  • We will look into this

  • Olrik,

    1. The customer needs to configure his undervoltage settings appropriately  as undervoltage is a safety condition for they battery. They need to make sure the pack can go down to 2.2V per cell and then configure the undevoltage thresholds and recovery appropriately. pls see the technical reference manual of the device on how to configure that.

    2. The EV2300 kit which you referenced from the prior post still exists for customers who want to write their own code to interface with the device using lanbview or what ever language they want. Scroll through the link and you will see the kit there.

    3. Update the firmware on the EV2300 to 3.1 m or 3.1r to prevent the logging issues. Firmware update and instructions in the link below.

    2330.EV2300FWUpdater.zip

    thanks

    Onyx