RegGuheert said:
TimLee said:
If you have such information, please provide the references and information.
You should never charge a Li-ion battery which is very cold, as it will destroy the battery. As a result, it is important to have the cold-weather package in very cold temperatures. Here is a pertinent quote from
Battery University:
Many battery users are unaware that consumer-grade lithium-ion batteries cannot be charged below 0°C (32°F). Although the pack appears to be charging normally, plating of metallic lithium can occur on the anode during a subfreezing charge. The plating is permanent and cannot be removed with cycling. Batteries with lithium plating are known to be more vulnerable to failure if exposed to vibration or other stressful conditions. Advanced chargers, such as those made by Cadex, prevent charging Li-ion below freezing.
Thank you, very good information. I was aware that charging at low temperature is the main concern.
Is there information though, that just dropping to extremely low temperature (without charging) can physically damage the battery?
Is a bit surprising that Nissan cold weather package only energizes at -4F and turns off at 14F, if sub 32F charging is highly detrimental? :?
My garage has a fairly common situation of attic above it, and the builder did not insulate the ceiling above the garage.
Good in that the garage usually stays >32F even with outside 0F weather (although haven't seen that in TN in over 5 years).
Bad in the summer though. I'm considering putting a large reversible efficient ventilation fan in the garage ceiling to keep the garage at outside ambient in summer with outside air coming in through screened garage window. Reverse flow in winter might help heat the garage, although probably not much help on a very cold day.