Korishan
Administrator
- Joined
- Jan 7, 2017
- Messages
- 7,525
Soooooo, came across this little gem today. He has 2 Tesla packs in this little cart. He isn't using a bms while charging it, AND using a dumb charger, apparently.
You can see there was a cable, then it disappeared. So we know what happened here.
ALWAYS use some sort of BMS while charging Lithium based cells, especially when more than 1s! If the charger only has 2 wires, it's a dumb charger and doesn't know the state of charge of the individual packs in series. This is HIGHLY dangerous and irresponsible.
Korishan@YT said:Ok, so reading a bit further, someone mentioned3:14. So I looked, and before3:13you can see a wire on the floor running up the side of the car and into the carriage. At3:14the wire is no longer there. Also, the guy jumped position as the video was edited right there, removing a few seconds worth.
Sooooo, the batteries were being charged WITHOUT a bms, and the cells were most likely OVERCHARGED causing the fire.?
You can see there was a cable, then it disappeared. So we know what happened here.
ALWAYS use some sort of BMS while charging Lithium based cells, especially when more than 1s! If the charger only has 2 wires, it's a dumb charger and doesn't know the state of charge of the individual packs in series. This is HIGHLY dangerous and irresponsible.