Power management

Power management forum

State Resolved
Locked Locked
Replies 10 replies
Answers 3 answers
Subscribers 63 subscribers
Views 676 views
Users 0 members are here

Support feedback

Options

Options

Related

BQ40Z50-R2: Chemistry ID selection

Alexey Bulatov

Prodigy 185 points

Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: GPCRA0, GPCRB

Hello.

I've a 2s2p battery consist of 4x HTCF26650-3200mAh-3.2V LiFePo4. I also made battery charge/discharge/relax test and got a report from Chemical ID SelectionTool.

In the report I can't find ChemistryID of my cell (there are 2 or 3 chemistry with name HTCF26650 3200mAh). How could this happen?

And best chemical ID has DOD deviation ~8%. This max error looks too high. Is it normal to use such chemistry?

over 6 years ago

0 Batt over 6 years ago

TI__Mastermind 42535 points

Hi Alexey,

That is too large a DOD error to use with this battery. The best way for you to advance this forward is to select a different battery with an already matched chem ID. Characterization is a long process at TI and takes months.

0 Alexey Bulatov over 6 years ago in reply to Batt

Prodigy 185 points

Hello Batt
Thanks for the reply.

I'd like to continue using my battery. Where should I write or contact to make characterization?

Thanks.

0 Batt over 6 years ago in reply to Alexey Bulatov

TI__Mastermind 42535 points

Alexey,

I'll have to find out if requests are still being taken for the queue. Give me a day or two to reply here.

0 Batt over 6 years ago in reply to Batt

TI__Mastermind 42535 points

Hi Alexey,

Please use the GPCRA0 tool to optimize your performance for room temp. That can fix many issues with resistance.

0 Alexey Bulatov over 6 years ago in reply to Batt

Prodigy 185 points

I've tried gpc tool for parameters optimization, but still there were problems at low temperatures and the lack of accuracy in determining SOC.

Thanks.

0 Batt over 6 years ago in reply to Alexey Bulatov

TI__Mastermind 42535 points

GPCRB is the tool for low temperatures. Please calculate using that if you need low temp optimization.

0 Alexey Bulatov over 6 years ago in reply to Batt

Prodigy 185 points

GPCRB tool didn't help and I'd like to make characterization.

0 Batt over 6 years ago in reply to Alexey Bulatov

TI__Mastermind 42535 points

Alexey,

This is a process that can in the best case take 14 weeks. Is this OK?

0 Alexey Bulatov over 6 years ago in reply to Batt

Prodigy 185 points

Yes. Could you please let me know whom I can contact?

0 Batt over 6 years ago in reply to Alexey Bulatov

TI__Mastermind 42535 points

I'm moving this to PM. Please accept my friendship request and I will send you the details there. This thread is closed.