Batteries vs Cold ☃

General Discussion about electric vehicles.
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changeissimple   10 W

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Re: Batteries vs Cold ☃

Post by changeissimple » Dec 06 2017 5:43pm

I have been riding in 40F temperatures and am a bit new to the E-Bike scene. I have seen a performance dip on the battery at that temp- I am not worried about the performance . However I am worried about hurting the battery long term. Will charging and riding in these temps (40F) hurt or degrade the battery and the life of the battery?

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DrkAngel   10 GW

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Re: Batteries vs Cold ☃

Post by DrkAngel » Dec 09 2017 8:06am

No definite answer on damaging, by discharging battery when cold ... but definite suppressed battery performance!
Charging when cold is detrimental!

Allow to warm near room temperature, then charge.

Put warm battery on bike for good initial performance.
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And drinking largely, sobers us again.

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changeissimple   10 W

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Re: Batteries vs Cold ☃

Post by changeissimple » Dec 12 2017 12:43pm

I put my bike in the basement for the winter just last week because of the snow and ice here in Boston. Wondering if anyone has a recommendation for maintaining the battery until spring. It is a 48v 26.1ah panasonic 13650 lithium ion pack. I have a 4amp charger. Should I charge it once a week, one a month? should I run the motor and drain the battery periodically? I'd love help on this issue. Maybe there is thread on maintaining the battery for a few months - love some help/recommendations.

tomjasz   1.21 GW

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Re: Batteries vs Cold ☃

Post by tomjasz » Dec 12 2017 12:49pm

changeissimple wrote:
Dec 12 2017 12:43pm
I put my bike in the basement for the winter just last week because of the snow and ice here in Boston. Wondering if anyone has a recommendation for maintaining the battery until spring. It is a 48v 26.1ah panasonic 13650 lithium ion pack. I have a 4amp charger. Should I charge it once a week, one a month? should I run the motor and drain the battery periodically? I'd love help on this issue. Maybe there is thread on maintaining the battery for a few months - love some help/recommendations.
Best stored at refrigerator, NOT fewer temps. Best I can do is 55F. Store at 50% charge. 46.8V.
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tomjasz   1.21 GW

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Re: Batteries vs Cold ☃

Post by tomjasz » Dec 12 2017 12:52pm

Here's the complete chart.
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Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

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DrkAngel   10 GW

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Re: Batteries vs Cold ☃

Post by DrkAngel » Nov 08 2018 6:48am

.
...
Just to remind!

Cold hinders performance
Temperature greatly increases internal resistance causing moderate to severe voltage sag = poor performance and indicating premature empty.
Keeping battery near 70ºF ensures good performance!
Insulate battery to keep warm if exposed to cold for any length of time.
Consider additional heating if in extended cold, external power to heating element or possibly self powered?

Cold can damage battery!
It is, nearly universally, stated and agreed that charging a battery when cold is not recommended >> warned against as detrimental >> damaging to batteries.
Battery is optimally charged at near 70ºF.
A little learning is a dangerous thing;
Drink deep, or taste not the Pierian spring:
There, shallow draughts intoxicate the brain,
And drinking largely, sobers us again.

I enjoy enlightening ... and enlivening the spirit of the innovators.

New & Improved - Acronym Definitions

Index - Homemade Battery Packs - Updated - November 2018

EBike Toolbox - Bargains! $

Endless Sphere Wiki - Lost?

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