Battery charging
04-22-24, 05:00 PM
#26
ignominious poltroon
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I thought I was bad for not changing the oil in 14 years.
04-22-24, 06:02 PM
#27
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Sorry but the freebie chargers that comes included with ebikes won't do this for safety reasons. That way the chargers don't runaway, cause a short, then a fire, then a lawsuit.
Now I know why there are so many ebikes for sale that "needs a new battery".
I store all my ebike batteries in my basement during off-season which is marginally heated to about 60°F.
But to leave a naked battery in some unheated garage all winter, good luck with that.
04-22-24, 06:29 PM
#29
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I'm wondering how many charge/discharge cycles you get out of that $800 battery. A quick Google search suggested 500-2000 cycles for e-bike batteries.
One nice thing about other kinds of batteries is that you can often shop around for attractively priced alternatives.
One nice thing about other kinds of batteries is that you can often shop around for attractively priced alternatives.
04-22-24, 06:54 PM
#30
Really Old Senior Member
I'm wondering how many charge/discharge cycles you get out of that $800 battery. A quick Google search suggested 500-2000 cycles for e-bike batteries.
One nice thing about other kinds of batteries is that you can often shop around for attractively priced alternatives.
One nice thing about other kinds of batteries is that you can often shop around for attractively priced alternatives.
I've only had it about 2 months and probably have about 70 miles on it due to weather.
It was bequeathed to me by my BFF in high school's widow.
It's a Godsend to me because my COPD has cut me back to 2 -3 miles every other day on my grocery getter. I can also ride in about 10 degree cooler temps now. It's kind of a wind chill factor thing. You want body heat or propulsion? Now, I might do 2-3 different errands in a day if it's warmish.
https://www.giant-bicycles.com/us/explore-eplus-3--2019
04-22-24, 08:26 PM
#31
LR÷P=HR
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Li-Ion cells do not like being over discharged. Below about 3V per cell, they are irreparably damaged.
Both their capacity and their internal resistance are degraded.
The cells in the OP’s pack are below 1V each cell. In the imortal words….. “this is a dead parrot”. 🦜
If you charge it for a year, on a windowsill, facing north, with magnets, under a scale model of an Egyptian pyramid, it will still be a dead parrot. 🦜
If this battery pack were a bicycle chain, it would be elongated (stretched) to about 10yards long.
I’m now going unsubscribe from this thread before the structure fire occurs. 🔥 🚒
Barry
Both their capacity and their internal resistance are degraded.
The cells in the OP’s pack are below 1V each cell. In the imortal words….. “this is a dead parrot”. 🦜
If you charge it for a year, on a windowsill, facing north, with magnets, under a scale model of an Egyptian pyramid, it will still be a dead parrot. 🦜
If this battery pack were a bicycle chain, it would be elongated (stretched) to about 10yards long.
I’m now going unsubscribe from this thread before the structure fire occurs. 🔥 🚒
Barry
04-24-24, 12:09 PM
#32
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Likely the onboard BMS has isolated the battery because it's dropped below its minimum voltage. That's why I suggested going into the battery pack and connecting directly to the cells - they may not be as dead as it seems, and only need some charge to bring them back to nominal voltage, when the BMS will be happy again. You can get an idea of what's going on by checking individual voltages - it might also be that the cells are good and the BMS board is toast.
