dutchlincoln
100 W
- Joined
- Sep 27, 2011
- Messages
- 135
Hello,
Recently i put 16Pcs. of Winston Cells in my electric scooter.
Free float voltage just after charging is 57 volts, which drops almost immediately to 52-53 volts when i turn on my lights.
When i pull the throttle, voltage drops to 48 volts, which is normal according to specs. (3v/cell under load)
Now, about one week later, during acceleration, voltage drops to 46 volts....
This is in the morning, with a fully charged pack.
I have not measured, but i assume approximately 40-50 amps load pulled max, which is exactly within even recommended discharge, not even peak.
This is my first expirience with Winston cells, so maybe someone could chime in, and tell me if this is normal?
I'm a bit disappointed about such voltage drop...
These 90Ah cells were taken from a brandnew "battery" of 4 cells in series, that are also sold by Winston.
What the company they sell claim, is that they are fine balanced 90Ah cells in one package, and a good alternative for loose sold cells, as the package of 4 is a bit cheaper.
When i look at the specs however, the loose cells and the "package cells" differ from specs.
Loose cells are given optimal vs max charge-discharge of 45 vs 270Ah.
Package cells are given optimal vs max charge-discharge of 45 vs 90Ah.
To me, this assumes that they actually are different then loose cells, and have an higher internal resistance, which explains the above mentioned voltage sag?
If anyone can shine his light about this, i'd be very happy.
Thank you.
Recently i put 16Pcs. of Winston Cells in my electric scooter.
Free float voltage just after charging is 57 volts, which drops almost immediately to 52-53 volts when i turn on my lights.
When i pull the throttle, voltage drops to 48 volts, which is normal according to specs. (3v/cell under load)
Now, about one week later, during acceleration, voltage drops to 46 volts....
This is in the morning, with a fully charged pack.
I have not measured, but i assume approximately 40-50 amps load pulled max, which is exactly within even recommended discharge, not even peak.
This is my first expirience with Winston cells, so maybe someone could chime in, and tell me if this is normal?
I'm a bit disappointed about such voltage drop...
These 90Ah cells were taken from a brandnew "battery" of 4 cells in series, that are also sold by Winston.
What the company they sell claim, is that they are fine balanced 90Ah cells in one package, and a good alternative for loose sold cells, as the package of 4 is a bit cheaper.
When i look at the specs however, the loose cells and the "package cells" differ from specs.
Loose cells are given optimal vs max charge-discharge of 45 vs 270Ah.
Package cells are given optimal vs max charge-discharge of 45 vs 90Ah.
To me, this assumes that they actually are different then loose cells, and have an higher internal resistance, which explains the above mentioned voltage sag?
If anyone can shine his light about this, i'd be very happy.
Thank you.
