BQ34Z100-G1: remaining capacity after several condition

K.Shidara

Expert 3225 points

Part Number: BQ34Z100-G1

HI Team

Would you advise following two questions,

1, For the "BQ34Z100PWR-G1", will the battery level information be reset if the battery is removed during use

and the fuel gauge IC is not supplied with power, and then the same battery is connected again?

2, If the battery is removed during use and a battery with a different remaining charge(not fully charged)

is connected, what kind of charge will the battery show? ( Represents the previous battery remaining status

OR accurately represents the newly connected battery remaining status OR represents a completely unreliable value

OR other?)

Thanks

Best regards,

Shidara

over 5 years ago

0 Wyatt Keller over 5 years ago

TI__Guru** 105590 points

Hello Shidara,

The gauge will loose the RAM information but will retain any information in the data flash. The gauge should retain Qmax and Ra tables but it will loose current SOC information.

Let me double check with the other conditions.

Sincerely,

Wyatt Keller

0 K.Shidara over 5 years ago in reply to Wyatt Keller

TI__Expert 3225 points

Hello Wyatt,

Thanks for your update.

What SOC value will be showed after reconnected the same battery?

Is that zero or proper value which is calculated by using the data flash and measured voltage?

Please double check the other conditions.

Thanks

Best regards,

Shidara

0 Andy Liu (BMS) over 5 years ago in reply to K.Shidara

TI__Guru 52115 points

The SOC will be calculated using the voltage, current, and temperature measurements after the bq34z100-g1 is powered on again.

Andy

0 K.Shidara over 5 years ago in reply to Andy Liu (BMS)

TI__Expert 3225 points

Hi Andy-san

Understood.

Then if the reconnected battery is the different individuals with the same battery case,

This calculation process performed and show the correct SOC value, right?

Thanks

Best regards,

Shidara

0 Andy Liu (BMS) over 5 years ago in reply to K.Shidara

TI__Guru 52115 points

The gauge will still assume that the original battery cells are connected. Normally the new battery cells should have slightly different resistance or Qmax from the old cells and therefore the initial SOC reading might not be very accurate. The accurate SOC readings will be achieved after a few charge and discharge cycles.

Andy

0 K.Shidara over 5 years ago in reply to Andy Liu (BMS)

TI__Expert 3225 points

Hi Andy-san

Understood. Thank you so much for your detail information.

Best regards,

Shidara

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BQ34Z100-G1: remaining capacity after several condition