Intentional cold soak -15

[Maxx]

I am charging now at battery temp of 39.2 (ambient 17F). Coolant heater is off and no energy is going to warming battery to higher temp. So my battery does not need to be at 60F to be charged. Not sure how low it can go without heating the battery during charging. I just know during periodical battery heating process, heater shots off when battery get to 41F. It looks like after it shots off the battery temp still may go a little higher. At those temps I get 100% power.

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[TaxmanHog]

I am charging now at battery temp of 39.2 (ambient 17F). Coolant heater is off and no energy is going to warming battery to higher temp. So my battery does not need to be at 60F to be charged. Not sure how low it can go without heating the battery during charging. I just know during periodical battery heating process, heater shots off when battery get to 41F. It looks like after it shots off the battery temp still may go a little higher. At those temps I get 100% power.

See Dave's post in this thread, makes sense......
https://www.f150lightningforum.com/...ing-for-departure-by-itself.24174/post-467611

 

[Maxx]

See Dave's post in this thread, makes sense......
https://www.f150lightningforum.com/...ing-for-departure-by-itself.24174/post-467611

Thanks. Look images bellow. my truck was plugged in and battery was at 21F. so 25 may not be low limit for Lightning as it is for Mustang.

One more piece of Info: I just juiced up from 50% SOC to 70%. At 6.5 KW (charger was giving out 7.3 KW). At ambient temp of 16F battery temp went up 7.2 degrees. I assume at your charge rate it would heat up faster. This was from 39.2F to 46.4F. Heater was not used to warm up the battery. Just the process of charging. The other thing I noticed the delivery loss was at 10% but if I recall correctly, I was losing 7% during summer.

Also look at battery Temp and Energy at the same SOC

This is when almost juicing is done:

This is before I went out for a ride and used up 20%.

 

[Firn]

I am charging now at battery temp of 39.2 (ambient 17F). Coolant heater is off and no energy is going to warming battery to higher temp. So my battery does not need to be at 60F to be charged. Not sure how low it can go without heating the battery during charging. I just know during periodical battery heating process, heater shots off when battery get to 41F. It looks like after it shots off the battery temp still may go a little higher. At those temps I get 100% power.

Hmm, I will need to look at mine but I would swear my truck is heating the battery to 60 during charging. Mine was near freezing when I started charging.

Frankly, it's frustrating, even with the -4 today my garage was just under 40 degrees. I would prefer to not heat my battery every time I charge just for that heat to bleed off everywhere.

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