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Off-FF topic ESS eBike-Supercaps-Solar Proj

A forum for discussions not related to digital forensics!
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jaclaz
Senior Member
 

Re: Off-FF topic ESS eBike-Supercaps-Solar Proj

Post Posted: Apr 20, 19 08:06

- TinyBrain
How many charging cycles of an eBike battery (Li-Ion/LiFePov4) are realistic from experience?

897.
or maybe 379, but could be 1247 or 2186

The point is not much about charging cycles but rather on how much energy the battery can keep and return (ASE) after having been charged, and both are actually correlated to DoD (and temperature, and charging voltage level and ...).

batteryuniversity.com/..._batteries

A history of 80-100% DoD cycles will reduce the ASE, as well as a (relatively) high voltage charging level (which however is needed to get 100% ASE).

The good news are that - on average - the climate in Switzerland is much better than - say - California/Nevada for the duration of these batteries.

jaclaz
_________________
- In theory there is no difference between theory and practice, but in practice there is. - 
 
  

TinyBrain
Senior Member
 

Re: Off-FF topic ESS eBike-Supercaps-Solar Proj

Post Posted: Apr 21, 19 06:41

Nice you found batteryuniversity.com - the guy behind is Swiss Smile

Do you have an eBike? Can you please share your experience?  
 
  

jaclaz
Senior Member
 

Re: Off-FF topic ESS eBike-Supercaps-Solar Proj

Post Posted: Apr 21, 19 09:21

- TinyBrain
Nice you found batteryuniversity.com - the guy behind is Swiss Smile


Yep, though I would say "of Swiss origins" Rolling Eyes :
batteryuniversity.com/about/


Realizing that conservative Switzerland could not satisfy his entrepreneurial spirit, he immigrated to Canada in 1966.



- TinyBrain

Do you have an eBike? Can you please share your experience?

No, but I twice or thrice rode a friend's one for a nice "walkabout" (can we use walkabout for a bike? and for an e-bike? maybe "rideabout" or "cycleabout") and was appointed to the role of Chief Assistance Engineer for the thingy.

Does this qualify me as an expert? Question

This specific bike (an el-cheapest Chinese pedal assist one) - reportedly - had the battery last (with decent capacity left) about two and a half years with a calculated number of cycles (always in the roughly 30%-100% range) of 498, then it started, in the following six months of so, to dramatically fail to be fully charged, until it fell below the 70% capacity (empitically measured, when new it did home-office-and back with 30% charge left, after three years cold not do the whole distance).
The replacement battery costed 95% of the new, discounted price of a whole brand new (still el-cheapest Chinese) bike with a battery with better capacity, so he got a new bike, for which at the moment I have no valid statistical data.

jaclaz
_________________
- In theory there is no difference between theory and practice, but in practice there is. - 
 
  

TinyBrain
Senior Member
 

Re: Off-FF topic ESS eBike-Supercaps-Solar Proj

Post Posted: Apr 23, 19 21:07

Fine, 500 recharging cycles are a good estimate for calculation. We only miss the experience of discharging supercaps to an eBike (replaceable) battery.

Anybody having supercaps in use for electric storage?  
 

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