BQ40Z50-R2: The accuracy of remain capacity

Jason Shen

Intellectual 1965 points

Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: BQSTUDIO

Dears

We have find one battery after < 10 cycle, find the SOH only have 58%. after doing a full charge and discharge cycle, it become normal and FCC is close to the design capacity. so want to check with you about:

1. in which case will introduce the SOH dropped so much.

2. which kind of parameters will have impact on the FCC refresh.

3. if customer design the termination voltage of 12.5V, and termination current of 0.2A. but the charger voltage is only 12.2V, will our gauge detect the termination condition and refresh the FCC and SOH?

Thanks

Jun Shen

over 5 years ago

0 Wyatt Keller over 5 years ago

TI__Guru** 105590 points

Hello Jason,

Did you run a learning cycle on the battery and do a calibration? Can you also get a log file of this occurring?

Sincerely,

Wyatt Keller

0 Jason Shen over 5 years ago in reply to Wyatt Keller

TI__Intellectual 1965 points

Hi Wyatt

Thanks for the support, yes, they have done the learning cycle and also calibration for the firmware. So customer need to do learning cycle and calibration for each individual battery? and if the SOH jump to a very low value, is there some possible issue of the hardware itself? thanks.

B.R.

Jun

0 Andy Liu (BMS) over 5 years ago in reply to Jason Shen

TI__Guru 52115 points

We would need a bqStudio log file, in order to find the cause. Can you provide it? Also, share with us a gg file. Thanks.

Andy

Power management

Power management forum

BQ40Z50-R2: The accuracy of remain capacity