BQ34Z100-G1: Custom battery Chemistry

Also:

• Eneloop batteries are 1.2 V (3 in series),
• Enersys are 2 V (2 in series).

Should the config be set for a single cell with 3.6 V and 4 V appropriately, or is this a multi cell design from IC point of view?

Hi Lukasz,

For your primary question:

Please use the GPCCHEM tool to find a match for these batteries. The match may be found with either a single cell of these batteries, or the entire stack (but please update the series value in the config.txt to reflect this). More information on how to match the chemID may be found in the user guide of the GPCCHEM tool, found at http://www.ti.com/tool/gpcchem

For your second set of questions:

The eneloop batteries are a 3S configuration and the enersys batteries are a 2S configuration.

From the IC point of view, this is a multi-cell design, however, most device parameters are the single cell values. Please make sure to update the cell update OK voltage to before changing the series value in DataFlash.

Sincerely,
Bryan Kahler

Thank you for answer,
Please let me know either I understand this correctly: I need to make some measurements using the BQ battery studio tool + EV2300, send you the log files, and the you will email me back with information what is my CHEMID?

For Cyclon Enersys batteries cant I only change the capacity parameter? Because I see that the 2500 mAh is available in the tool (I need 500 mAh and 8000 mAh ones).

Hi Lukasz,

You will make the log with bqStudio and the EV2300 and submit it to the tool, following the instructions at the link above.

Thanks!

Sincerely,
Bryan Kahler

Hello, thank you for answer. Could please explain what exactly I need to do? If I inderstood corretly, Bq studio can gwnerate somw kind of a log? Do you mean a link that will be visible in bq studio? What actiona do you need me to take before commiting the log?

Thank you for answer, I will try to go on with this tool.

Could you please explain what did you mean by this?

"From the IC point of view, this is a multi-cell design, however, most device parameters are the single cell values. Please make sure to update the cell update OK voltage to before changing the series value in DataFlash."

What is the name of the register "cell update OK voltage"? I cannot find it anywhere, was that some figure of speach?

(Hi, I thought I'd help here becasue I'm interested in this thread) I believe that should be: "Flash Update OK Cell Volt" it can be found in the Data Memory> Power section of flash memory.

Thank you for answer,
I also thought only of this register, but I am not sure what does it have to do with anything. What I dont understand is this thing: I have 2 cells 2.2V max each. Is it a multicell, or single cell design? Because from what I understand, I need to set the device to use external divider now, since its a multicell design? If I set number of cells to 2 and set voltage to 4.4V, will it think full charge is at 8.8V or 4.4V? This is very unclear for me. I lack a proper guide and the answer time on this forums from TI employees is very, very long (if any). We want to implement this chip in an end product, I dont understand why is the support so poor. There should be a teamviewer session with someone who can show us how to set those registers one by one.

Much of what you are asking is explained in the BQ34Z100-G1 spec, T.I. document: "SLUSBZ5B" found here: www.ti.com/.../bq34z100-g1.pdf

With all due respect but there is not. That documents consist of many unspecific, very generic examples. There is not a single example taking the user through configuring an actual battery step-by-step, register by register. It only says what to do in a way one would tell someone that doesnt really care. Also I havent found the answers for my questions there thats why I posted the question here.