CEDV algorithm of BQ4050

Scofield

Other Parts Discussed in Thread: BQ4050, GPCCEDV

Hi，Expert

1. CEDV algorithm using BQ4050，It means that the EDV0/EDV1/EDV2 points are all changed?Or is it that only the voltage at EDV1/EDV2 changes?

2. Are the EDV2/EDV1/EDV0 voltages and delays set in Gas gauging useful using the CEDV algorithm?Or is it possible to not set it up?Just set the voltage and delay of EDV0?When the FIX_EDV0 function is turned on

over 2 years ago

0 Shirish over 2 years ago

TI__Guru 57747 points

Hello Scofield,

For best performance, use the report from the GPCCEDV tool to set the values.

0 Scofield over 2 years ago in reply to Shirish

Intellectual 570 points

Hi，Expert

CEDV algorithm using BQ4050，Using high current discharge, the SOC jumps at the end of the discharge, for example: 3%-->0%, 2%-->0%, how to optimize the situation so that the SOC does not jump?

The configuration of "CEDV Gauging Configuration&CEDV Smoothing Config" is as follows:

0 Shirish over 2 years ago in reply to Scofield

TI__Guru 57747 points

Hello Scofield,

I am assuming you programmed the values from the GPC report. Check if the initial capacity was specified correctly.

The FCC value is updated only after a full discharge. If the initial capacity was not a correct match to the cell, then what you see is normal. The next cycle would be more accurate in such cases.

0 Scofield over 2 years ago in reply to Shirish

Intellectual 570 points

Hi，Expert

The data in the picture is calculated by the GPCCEDV tool,Where is EDVV in the register?

0 Shirish over 2 years ago in reply to Scofield

TI__Guru 57747 points

Hello Scofield,

I couldn't find it either :-) Looks like there is an inconsistency in the TRM.

In one place it says that EDVV is in Pack Configuration but that parameter does not exist.

I searched through the TRM and finally found it. It has been renamed to "CEDV Gauging Configuration" in bq4050. It is found under "Settings". The bit name is EDV_PACK.

0 Scofield over 2 years ago in reply to Shirish

Intellectual 570 points

Hi，Expert

That means if EDV_PACK=0, then EMF and EDVR0 do not need to have to be multiplied by the number of serial cells when written to data flash？

0 Shirish over 2 years ago in reply to Scofield

TI__Guru 57747 points

yes

Power management

Power management forum

CEDV algorithm of BQ4050