Troubles in Travel
New Member
- Joined
- May 16, 2022
- Messages
- 14
I ordered 4x 280 Ah cells on Aliexpress. QR codes were OK, terminals bit scratched. But overall there was no cut / puncture / deep scratches on cells. They were all in ok visual shape, no bloated cell either.
I assembled cells into a battery and after a few trials and errors, I think it worked out.
There was 1 think which worried me. During the charging cells I think I smelled some kind of smell. I was a bit afraid so made a few more charging / discharging tests and smell was only appearing in some occasions.
To test are they broken or not, I ordered a battery tester and tested battery twice (9A discharge). It showed 254Ah 3285Wh.
Before test all cells were top balanaced and charger to 3,65V. After discharge, there was quite a big difference in voltage: 1. 2,775 2. 2,829 3. 2,920 4. 2,974 (0,2V diff)
Cells are compressed, but I left minimal gaps to let them expand a bit.
BMS is JBD-SP04S020
My main question is: Are they safe to use? Should i sealed them in a box?
Thank You for all help
I assembled cells into a battery and after a few trials and errors, I think it worked out.
There was 1 think which worried me. During the charging cells I think I smelled some kind of smell. I was a bit afraid so made a few more charging / discharging tests and smell was only appearing in some occasions.
To test are they broken or not, I ordered a battery tester and tested battery twice (9A discharge). It showed 254Ah 3285Wh.
Before test all cells were top balanaced and charger to 3,65V. After discharge, there was quite a big difference in voltage: 1. 2,775 2. 2,829 3. 2,920 4. 2,974 (0,2V diff)
Cells are compressed, but I left minimal gaps to let them expand a bit.
BMS is JBD-SP04S020
My main question is: Are they safe to use? Should i sealed them in a box?
Thank You for all help