Battery charging
#26
ignominious poltroon
Join Date: Jan 2022
Posts: 4,129
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 2277 Post(s)
Liked 3,500 Times
in
1,836 Posts
I thought I was bad for not changing the oil in 14 years.
#27
Senior Member
Join Date: Feb 2022
Location: GMT-5
Posts: 967
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 564 Post(s)
Liked 422 Times
in
279 Posts
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.
#29
Senior Member
Join Date: Oct 2023
Location: New Jersey
Posts: 598
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 382 Post(s)
Liked 288 Times
in
185 Posts
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.
#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
#31
LR÷P=HR
Join Date: Sep 2019
Location: SF Bay Area
Posts: 2,216
Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-)
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 882 Post(s)
Liked 1,232 Times
in
712 Posts
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
#32
Senior Member
Join Date: Apr 2016
Posts: 1,352
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 541 Post(s)
Liked 477 Times
in
364 Posts
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.