Battery life in the cold

WheezyRider

Esteemed Pedelecer
Apr 20, 2020
1,690
938
I went out a few days ago on one of my usual routes and I was wearing my cold wet weather gear as it was 3 degrees, a little misty and a light wind. As the ride progressed the wind picked up and the mist turned to drizzle. Riding in sport mode this 25 mile route would normally use 3 of the 5 battery bars on the display but this time only 2 bars had been used.
I put this down to the fact that the battery was fresh off the charger, I was out riding within 5 minutes of the charge cycle completing so the battery didn't get a chance to cool down (Not that it felt warm)
I’m going to try and time my next charge to finish just before a ride, if that’s not possible I may put the battery in my airing cupboard for an hr before going out !;)
Be careful about charging to 42V for a 36V pack at room temp, then placing the pack in a warmer environment too long. This can lead to electrode degradation inside the cells.
 

Gringo

Esteemed Pedelecer
Jun 18, 2013
1,346
842
Northampton
Be careful about charging to 42V for a 36V pack at room temp, then placing the pack in a warmer environment too long. This can lead to electrode degradation inside the cells.
From my room temp say 20 degrees to airing cupboard for an hour probably 25 degrees, I think I’ll be ok
 

WheezyRider

Esteemed Pedelecer
Apr 20, 2020
1,690
938
Get a Scottish army MRE using a radioactive heater (cheap on ebay) and use the heater element to keep pedelec electrics & battery toasty warm - works for NASA for martian rovers etc.



With 1W heat output, you could be waiting some time :)
 

Advertisers