BQ34Z100-R2: BQ34Z100-R2

Hello Max,

Today is a national holiday, and we will work on your ticket in the upcoming business days.

Thank you,
Alan

Hi 

Thanks

we are using a Dump pack battery pack.

Whether the battery pack positive and negative can be connected to this IC and we can calculate the SOC and communicated through I2C communication?.

If you have better IC for SOC calculation of Dump pack also, Kindly suggest us to check it out.

Regards

MAX

Hi 

It means a Battery with protection and has a output pins positive ,negative and a thermistor pin.

By this we can estimate right?.

Regards

MAX

Hi

In the following above circuit in EVM it is specified that BAT- and PACK-,Both are same right, When use separate discharge path we can connect to the pack- ,B- or else we can use only B+ and B_ right for sensing the current ?.

Hi

Thanks 

So we can connect the charger of the battery pack and load to this PACK-,so the current can be measured.

Also  for a 5S battery pack what to be configured in the following voltages 16V ,32V or 48V?

Regards

MAX

Hi

I have connected the Bq34z100-r2 EVM using EV2400 ,Few issues i am facing which is listed down below

1.When connected through EV2400,the Gauge is not Auto detecting, We need to open Bq Studio- Gauge  -then IC (bq34z100).In EVM datasheet it is stated that it will be auto detected.

2.We are using NCR18650BD cell and i have updated the correct CHEM-ID ,And when trying  to do learning cycle, the learning cycle fails. we have set the VOLSEL bit High ,charge current  threshold, design capacity etc as suggested in learning cycle document .also in evm we have set 16V Jumper selected(BAT voltage-16.4V)and the we have given following commands stated in TRM for doing learning cycle.

3.When battery is discharged to empty, and made to relax for 5 hrs and when started charging at C/2,VOK does not set automatically. during learning cycle.

The battery discharge and when we put 5Hours relaxation, again we have charged the battery, The FC bit set so early and charging also happens.

The remaining capacity and full charge capacity is also showing wrong values.

Kindly give us a solution to proceed further.

bq34z100-r2 gg.gg.csv

Attached the .gg file for reference

Hi Diego

W..r.to

1.The window detects the gauge and when selecting it's opening,

We have calibrated the voltage , current and temperature before going the learning cycle.

While charging FC BIT automatically sets during mid voltage in the learning cycle.Also when the battery is fully charged,the gauge shows the capacity as 300mah(full capacity), suddenly when the power supply is off the mah decrease to 70pmah and showing a discharge current of 20mA.

3.we have configured the necessary parameter of data memory for learning cycle..attached the gg file in previous thread FYI.

Expecting the reply at the earliest.

Hello Max, 

We have received your update and working on a response.

Thank you,
Alan

Hi

The window shows as follows and auto detected Device is as follows

dis.xlsx

2.I have only the discharge Log file

But after relaxing and done charging the battery reaches its max voltage and shows a capacity of 2986mah,but when i disconnected the power supPly,the battery mAh reaches 300mah .

WETHEHR THE BATTERY MAH WILL CHANGE WHEN CHARGER /LOAD IS DISCONNECTED AFTER CHARGING?

One More Query:-

1.When doing a Learning cycle 1S li-ion cell, while doing learning cycle we set cell Termination Voltage 3000V,the battery gets terminates at this point.

 In this point whether the battery will terminated at fuel Gauge IC Cell termination Voltage or it will be terminated w.r.to battery pack protection parameter?

Attach the discharge file for reference.

Regards

MAX

Hi 

Could you Share me the link to upload the file

The link has expired.

Hi

Thanks 

W.r.to 

Your post :- gauge will do nothing when terminate voltage is hit, this is only to notify the gauge that at this point SOC should be 0%.

So in my battery Fuel gauge it shows 0% in Bq34z100 window and battery discharges after that too some extent and it terminates. Is this is a problem ?

2.When during learning cycle While charging FC BIT automatically sets during mid voltage in the learning cycle. Also when the battery is fully charged, the gauge shows the correct capacity as 3000mah(full capacity), suddenly when the power supply(Charger)  is off the mah decrease to 100mah (Displays in Fuel Gauge Window) and showing a discharge current of 20mA.

What to be done to proceed on it.

Hi 

We have started learning cycle for 5S1P pack,In this we have discharged the battery ,relax for 5 hrs and then charged,

The battery is charged and the when put under idle case ,The Fuel Gauge shows -25mA discharge current taken from battery to discharge.

Kindly help us to solve the problem.