Does anyone climate control their battery packs?

[bashers]

I'm building a power storage system this month based around a BMW i3 battery.
This has spent its working life in a climate controlled zone under the car, heated and cooled as required.
The 8 modules are 44V 94ah cells and the published ratings suggest 10ah more storage per module at 25 degrees (centigrade) than at -5 degrees, and that amounts to almost 4kw lost capapcity

I plan to install a heating element (large vivarium heat mat) in this pack before installing it in the garage and setting it on a themostat to keep it above say 15 degrees

This is the most efficient was to store and consume power, so why do i see very little mention of this in these forums??

 

[Oberfail]

This is the most efficient was to store and consume power, so why do i see very little mention of this in these forums??

Because it requieres a lot of work to implement correctly and having them sit in the basement, where its pretty much always between 10 & 20°c is not bad either.

 

[Wolf]

so why do i see very little mention of this in these forums??

Duno. But I have quite a bit of discussion about HVAC (more heating than cooling) in my thead.

Wolf's PowIRwall

When these are ready... do you have 14 packs and this will take you to 28 packs? Will you be having 2 x 14s batteries or paralleling these new packs in with existing packs. Its so much fun to get 1,000(s) of cells hooked up ready to charge and discharge!:) Yes it will take me to 28 packs. I am...

secondlifestorage.com

I implemented a system in my battery box and once all the winkles where ironed out it works quite well.

Wolf

 

[OffGridInTheCity]

I have 2 sets - the house powerwall and the trailer.
- Powerwall - is under the house for 'climate control' and ranges from 55F/13C to 75F/24C thru the year - which I hope will reduce stress.
- Trailer - The mini-spit is running year-round ranging from 60F/15C (as low as it will go for winter) to 80F/27C summer (so I can go in/out comfortably). I also have RV heating pads under the battery for <30F/01C if something happens to the mini-split.

Particularly for the house powerwall (~9,000 cells) I'm hoping the controlled temps + 40% DOD will actually get me to 5,000 or 8,000 cycles... I'm at 1,421 cycles so far. 8,000 cycles would be 18 more years (I'd be 85) - so I guess its also if I live that long

 

[Redpacket]

Also would depend on the temp range where you are + exposure to sun/heat.

 

[jdeadman]

Definitely required if you have temps that go below zero. Lithium cannot be charged when below 0 degrees C I live in Canada and we get weeks of -40 Degrees (it does not matter C or F) and when I will be setting up a Off-grid 4 season house I will my batteries climate controlled but in a separate Shipping container that will be temperature regulated the same way my house and garage will be and that is via Hot/Cold water radiant.
My Camp right now is not temp controlled but I only use it during the summer and the temps are always in the positive and I even though it does get hot here +40C I have not noticed my batteries have any issues with that temp