Hi,
DISCLAIMER: I am a beginner with batteries but have some experience with electronics repair.
Last year, I acquired a VanMoof Electrified S. The bike had some issues, the main one being a suspected dead battery. After 15 minutes of biking, the eBike lost power and displayed some errors.
I removed the battery from the bike, checked the voltage, and identified that one of the 10 packs of 18650 LG cells had a significantly lower voltage. Due to other projects, I put the bike in storage.
Now, I'd like to try to fix the eBike again. I remeasured the voltage of the cells. It has 40 cells in total, arranged in 10 packs in series of 4 parallel cells. The battery is a Darfon 36.2V 11Ah/392.2Wh, model number: e4c08. The cells are LG GBMG11865 P237H244A1.
Using a voltmeter, I read the following voltages for the 4-packs:
My questions are:
Sander
DISCLAIMER: I am a beginner with batteries but have some experience with electronics repair.
Last year, I acquired a VanMoof Electrified S. The bike had some issues, the main one being a suspected dead battery. After 15 minutes of biking, the eBike lost power and displayed some errors.
I removed the battery from the bike, checked the voltage, and identified that one of the 10 packs of 18650 LG cells had a significantly lower voltage. Due to other projects, I put the bike in storage.
Now, I'd like to try to fix the eBike again. I remeasured the voltage of the cells. It has 40 cells in total, arranged in 10 packs in series of 4 parallel cells. The battery is a Darfon 36.2V 11Ah/392.2Wh, model number: e4c08. The cells are LG GBMG11865 P237H244A1.
Using a voltmeter, I read the following voltages for the 4-packs:
- 3.3V
- 3.3V
- 2.5V
- 3.4V
- 3.4V
- 3.2V
- 3.4V
- 3.4V
- 3.4V
- 3.3V
My questions are:
- It seems that just one of the cells is problematic. Is it viable to replace this one LG cell with a similar one?
- If it is viable, how should I proceed?
Sander