[NSRCA-discussion] LiPo Fun Fact 'O The Day

[Jeff and Claire]

Yes, warm to at least 50deg F before charging.  Was charging at the field
last winter and the Powerlab6 was stopping charge at  90% of capacity.
Thought the charger was broken.  Turns out they use the internal temp sensor
to check ambient as well and if below 50F, it will stop at 90% to keep from
damaging the battery (with the assumption that battery is also <50F).  The
Powerlabs allow lowering that threshold to 41F, once I did that started
getting full charges (but made sure the batteries stayed warm before charge
via thermo-nuclear fusion (truck dashboard).       

 

>From FMA Revolectrix engineering group: Lithium is a poor performing battery
in cold weather. If the pack is cold, the cell damage voltage reduces from
4.35V down to 4.20V. That means charging a lithium pack to 100% when it is
below 50 deg F will reduce cycle life. Automatic temperature monitoring
prevents pack over-charging at low ambient temperatures

 

They also say:   LiPo packs charged to 100% should not be cooled below room
temperature. Cells at 90% or less capacity can be cooled below 32ºF (0ºC). 

 

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On
Behalf Of Stuart Chale via NSRCA-discussion
Sent: Saturday, October 10, 2015 9:01 AM
To: chuenkan at comcast.net; General pattern discussion
Subject: Re: [NSRCA-discussion] LiPo Fun Fact 'O The Day

 

What about if you store them in the fridge  during the week.  Should they
warm to room temp before charging or is charging them cold OK?

On 10/10/2015 10:08 AM, Phil Spelt via NSRCA-discussion wrote:

Correct!!!  I don't do that...

 


  _____  


Apparently you guys never put them on charge when they're hot!!  Then they
definitely cool down while charging.  :)

Sent from my average intelligence  phone 

 


On Oct 9, 2015, at 8:44 PM, Robert L. Beaubien via NSRCA-discussion
<nsrca-discussion at lists.nsrca.org> wrote:


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