BQ34Z100-G1 :bq34z100

Lyes BACI

Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQSTUDIO

Bonjour tout le monde,

j'ai une carte avec une golden image pour une batterie de 51.2V avec 105Ah(16s) je veux monter une batterie avec une baterie de 51.2V 50Ah (16s16p) par contre l'identitie chimique sont pas pariel,

que je dois faire pour la rendre compatible (je parle des paramètres).

merci pour votre aide .

merci d'avance

over 3 years ago

0 Wyatt Keller over 3 years ago

TI__Guru** 105590 points

Hello Lyes,

I tried to translate your inquiry, but I do not understand what your question is. Could you translate to English?

What I think your question is: Can you use the same chem ID for 2 different packs

Answer: If you are using the same cell for both packs, you can use the same chem ID, but you will need to run a new learning cycle.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Good morning,
this is not my question

my question is :
currently I use a battery of 105Ah 51.2V (16s) I want to show another battery of 51.2V with 50Ah but with (16s16p) the two batteries do not have the same chimeric identity.
in the BQ you can only declare the cells in series, not in parallel.
what are the parameters I have to change before doing a training?

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

You will need to update the design capacity and re-run the learning cycle. The design capacity is what we use to compensate for the number of cells in parallel. Depending on how you setup the charge termination you may also need to adjust the Charge Term Taper Current and Charge Term Voltage.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Hello,
about term load taper current one cell is 0.01C and for 16 in parallel it is 0.16 C ?

thanks

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

This depends on your chargers taper current, the gauge needs to detect full charge before the charger cuts off charge. It should be around 10% higher than your chargers setting.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Hello Keller,

I give you a little summary of what I did:
before I have a golden image for a 16S battery chemical identity 009 now I use another battery of 16s16p HTCFR26650 chemical identity 409.
I changed the parameters to start a learning cycle.
so before that I put the Update status "=0x04 and it enable and rest
The problem is that the FCC does not correspond to what I put qcell0 and designate capacity =5120mah it displays 4110mah

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

The FCC is not the same as the Qmax value, FCC will be reduced by the expected load (depending on load select/mode) and the temperature at that load. Qmax is the ideal full capacity of the battery and does not account for the expected losses due to discharging.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

when I send it enable and reste the update status automatically changes to 04 or I have to do it manually?

then why does RC and FFC display this value before the learning cycle?

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

The update status should stay at 0x06 if you completed the learning cycle. You cannot manually change the update status to 0x06.

The values of RC and FCC before the learning cycle and the correct chem ID is uploaded would not be accurate. It will still report the values.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

je peux vous parler en privé pour plus de details

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

I can add you as a friend if you would like to share more details offline.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

hello wyatt,

when i send IT_enable and reste learned statut is 06.why it does not recover to 04?

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

The IT_EN command only switches on and off the impedance track, it does not clear the learned data (Qmax and Ra table) from the learning cycle, which is what the 0x06 indicates. 0x02 means the battery is learned but impedance track is off. 0x04 means impedance track is on but the pack is not learned.

You can write the register to indicate 0x04 to reset the learning process, or you can upload the default srec again (from before the learning cycle)

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Hello wyatt,

after a cycle of learning cycle the learned status has 06 so ok
why the SOH is 98 % knowing that I put the count cycle at 0 and learned status 02 to create golden image?

thanks

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

The impedance track algorithm will be disabled when the update status indicates 0x02. So all gauging related parameters will not be accurate.

If you can log the learning cycle and show the SOH is 98% we can take a further look into the reasons it may be reporting this.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Hello Wyatt,

you will find attached the learning cycle.

thank you for your answerlearncycle11.log

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

I will take a look tomorrow at the logs.

Sincerely,

Wyatt Keller

0 Wyatt Keller over 3 years ago in reply to Wyatt Keller

TI__Guru** 105590 points

Hello Lyes,

Could you also share your .gg file settings from before and after the learning cycle?

The SOH is calculated based on the ratio of FCC to Design Capacity, if your predicted FCC from the SOH load at 25degC is less than the design capacity, then the SOH will report that percentage.

You can see in the log that when Qmax is updated the SOH is 100%, then the Ra table updates and it goes back to 98%, this may be because the Ra table increased when it was learned.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Hello Wyatt,

thanks you for your answer
The design capacity is 51.2AH and the FCC 48AH I think because of that

you can tell me how to download .gg file please.
and I'll do the test again with a new pack.

thanks

Lyes

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

The FCC reported in the log is not the same as the one used for SOH, the FCC reported in the log uses the load mode and load select to predict FCC, the SOH uses a set current of 400mA by default that can be adjusted to match the application.

If the cells are slightly less than the manufacturer value, just set the design capacity to the Qmax you got from the learning cycle, it should report more accurate SOH if you do this, no need to export the .gg if this fixes the discrepancy.

You can export a .gg file in bqStudio by going to data memory > export.

Sincerely,

Wyatt Keller

0 Lyes BACI over 3 years ago in reply to Wyatt Keller

Prodigy 70 points

Hello Wyatt,

you will find attached .ggfile after learning cycleafter learned cycle.gg.csv

0 Wyatt Keller over 3 years ago in reply to Lyes BACI

TI__Guru** 105590 points

Hello Lyes,

Did adjusting the design capacity help the SOH difference?

Sincerely,

Wyatt Keller

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BQ34Z100-G1 :bq34z100