What's the lowest temperature to ride, without causing damage to your battery? Is it also safe to use insulation??
If we are talking properly cold -5 to -20 degrees centigrade then there is a real issue of damage.Why should there be damage when riding ? When I was a boy, battery power output fell with temp so range will reduce.
Batteries have a temperature range specified and usually printed somewhere on the battery. Look in the manual. You'll be surprised what's in there.What's the lowest temperature to ride, without causing damage to your battery? Is it also safe to use insulation??
Batteries have a temperature range specified and usually printed somewhere on the battery. Look in the manual. You'll be surprised what's in there.
Your question needs some clarification however.
If you have the bike at room temperature and then go out and ride in the freezing cold, the battery will keep itself warm. Insulation may or may not help, I doubt it, the thing will look after itself.
If you plan to store the bike outdoors in the cold but "protect" the battery with insulation, you're wasting your time. No matter how well you insulate it, it will reach ambient temperature if there is no heat source. In other words, in the morning when you break your two bikes out of the ice, the one with the battery in a blanket and the one with the naked battery will be at exactly the same temperature.
As commented elsewhere - the 10C figure seems like rubbish. However, I have found a proper reference to it - so your comment is not daft - you just used data that cannot be correct. The source I found indicated that the battery would not function below 10C - and I know I have cycled perfectly well below that - even when my bike+battery had been in the shed all night at below that (that was before I knew better!)Pulled from Google search- should cover general guidance of operating range
The use of a lithium-ion battery is possible in a temperature range of 10°C to +55°C. However, the charging should take place only at a battery temperature of +5°C to +45°C. The ideal temperature range of the batteries is room temperature.
If we are talking properly cold -5 to -20 degrees centigrade then there is a real issue of damage.
As the battery capacity reduces dramatically at these temperatures (90% to 65% of capacity) as well as just shortening the range you can get permanent damage from cell reversal as you are more likely to run some cells within the battery flat.
Whenever you get close to fully discharging a multi cell battery there is a risk/certainty that various cells within the battery will have various levels of charge, when a cell has a significantly lower charge it risks a current flow from the surrounding cells in the wrong direction to recharge it, this will cause cell reversal which is permanent damage.
The same is of course true whenever you get close to fully discharging a battery pack in the warm, but protective electronics may say "no more power" when there is still some power left to avoid this.
As the temperature reduces cells with significantly lower capacity will discharge faster proportionally than their surrounding cells thus may be enough to kill a few cells but not enough of an overall power drop to trigger the protection circuitry.