thunderstorm80
1 kW
- Joined
- Mar 29, 2016
- Messages
- 383
Hi,
I use those cells on all my E-bikes.
I wrap all of them into a battery pack using several layers of gopher tape, which proved very well for applying the required pressure upon the cells. (I apply pressure by hand when I wrap them, as they require to be pressurized a bit)
Yesterday, I discovered that half of the cells inside the 10S pack on the touring bike got expanded.
So now I several unsolved dilemmas which I couldn't find solution for here by doing a search:
1. I assume that the shocks and vibrations on that bike (700x45 tires at 60PSI with no suspension) caused that? (The other packs on the other bikes which are sprung looks fine)
2. I know that these cells will vent in case the gas pressure builts up - so I wonder if any better pressurization of the cells would have helped (for example if they were inside a rigid metal case) since that gas has to go somewhere...
3. Will a rigid metal enclosure prevent that gas-out in the first place, in-spite of those vibrations due to lack of suspensions, or do these cells not recommended in such scenario in the first place?
4. Can the expanded cells be fixed some how by forcing the gas to be recombined with the electrolyte? (Each cell expanded just by a bit, but together as a 5 - that protrusion looks much more significant).
5. If not - Are they still usable? And what should be the order of the capacity loss?
6. I am curious why exactly half of them expanded (the left side of the battery, inside the frame triangle), although I guess this would remain a mystery...
I use those cells on all my E-bikes.
I wrap all of them into a battery pack using several layers of gopher tape, which proved very well for applying the required pressure upon the cells. (I apply pressure by hand when I wrap them, as they require to be pressurized a bit)
Yesterday, I discovered that half of the cells inside the 10S pack on the touring bike got expanded.
So now I several unsolved dilemmas which I couldn't find solution for here by doing a search:
1. I assume that the shocks and vibrations on that bike (700x45 tires at 60PSI with no suspension) caused that? (The other packs on the other bikes which are sprung looks fine)
2. I know that these cells will vent in case the gas pressure builts up - so I wonder if any better pressurization of the cells would have helped (for example if they were inside a rigid metal case) since that gas has to go somewhere...
3. Will a rigid metal enclosure prevent that gas-out in the first place, in-spite of those vibrations due to lack of suspensions, or do these cells not recommended in such scenario in the first place?
4. Can the expanded cells be fixed some how by forcing the gas to be recombined with the electrolyte? (Each cell expanded just by a bit, but together as a 5 - that protrusion looks much more significant).
5. If not - Are they still usable? And what should be the order of the capacity loss?
6. I am curious why exactly half of them expanded (the left side of the battery, inside the frame triangle), although I guess this would remain a mystery...