BQ34Z100-G1: .

SHYAM SUNDAR D G

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

Hi,

1) I am trying to get a fuel gauge ready for a 2s Li-Ion 6000mAH 4.2V max. The battery which I am using is from a local vendor which does not have any Datasheet, and also If i have to program a CHEM ID for the specifications mentioned above, without having to check Gauging Parameter Calculator: Match chemistry for Impedance Track gauges, as I have very less time to Complete the project, Can you please help me which CHEM_ID can I use it. I am unable to perform a successful Learning cycle as the BITS that determine the charge and discharge cycle are not acting as mentioned in the Technical Reference, even after passing the IT_ENABLE.

2) And since the Default settings are fro Li-ion, Is it Okay to just set the data flash without performing Learning cycle?; will the gauge LED's Work this way?

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

We cannot simply tell you which chemistry id you can use. It is necessary for you to use the GPCHEM tool to find a proper chemistry id. Also, you need to run the learning cycle. Otherwise, the state of charge reported will not be accurate.

0 SHYAM SUNDAR D G over 5 years ago in reply to Andy Liu (BMS)

Prodigy 200 points

Andy Liu,

Thank you for the response.

I have one more doubt, due to some reasons my device gets " No Acknowledge from device" for very few seconds, when performing learning cycle with a similar CHEM ID programmed. Do I have to re-perform the whole cycle of Learning cycle from initial steps else by Enabling IT from the step where the device did not get acknowledge will it work?

0 Andy Liu (BMS) over 5 years ago in reply to SHYAM SUNDAR D G

TI__Guru 52115 points

When did "No Acknowledge from device" occur? Could you provide a bqStudio log file?

Andy

0 SHYAM SUNDAR D G over 5 years ago in reply to Andy Liu (BMS)

Prodigy 200 points

0118.Log started at 1.55pm.log

0 SHYAM SUNDAR D G over 5 years ago in reply to SHYAM SUNDAR D G

Prodigy 200 points

Andy Liu,

After the first discharge, IT_enable and started to charge battery to full and relaxed for >5hrs, The FC bit is not set instead RUP_DIS bit is set. But for FC Bit to set, the Conditions that satisfy are

a. Battery voltage is within 0.1 V of the Charging Voltage as defined in bqStudio.
b. Battery current is below Taper Current, as defined in bqStudio.
c. Battery current stays below this Taper Current and above the Quit Current for over 40 seconds.

All the above conditions are satisfied, yet FC bit is not set. The Log file is attached above