BQ27220: VDQ=0

xueqi zhu

Part Number: BQ27220
Other Parts Discussed in Thread: GPCCEDV

Tool/software:

Hello sir,

I have a 2-cell 3.6-4.2V lithium battery parallel power supply handheld device, for some reason set 3.74V on low power shutdown, now the application BQ27220 measure the battery power, the test found that there is no way to learn the power and update, after the test voltage to the EDV2 threshold, VDQ=0, that is, the qualified discharge has not been completed, please ask me if there is a problem with this configuration, the configuration of the BQ27220 is as follows:

over 1 year ago

0 Dominik Hartl11 over 1 year ago

TI__Guru 61006 points

How did you set EDV2 and the CEDV parameters? Do you have a register log file from full (with VDQ = 1) to the point where VDQ changes to 0?

0 xueqi zhu over 1 year ago in reply to Dominik Hartl11

Prodigy 10 points

1.I used the DOD curve given by the battery manufacturer to change the parameters directly，Is it necessary to use the CEDV tool to simulate the battery charge and discharge data?

2.Do CEDV curves have to be acquired with the GPCCEDV tool?

3.Does the CEDV tool generate the corresponding battery data when VDQ=1?

0 Dominik Hartl11 over 1 year ago in reply to xueqi zhu

TI__Guru 61006 points

How did you generate the CEDV coefficients with the information from the datasheet?

GPCCEDV uses six log files for analysis and to generate these parameters.

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BQ27220: VDQ=0