I started out wanting this to be about battery heating....but after a little thought, I decided to throw out this title. With the recent discussion of temperature in the BMS "debate" and my impending need to re-stuff my EV full of lithium, I don't really want to pull them out again for more mods.
For a top performing battery, in all climates ( I realize yours may be different than mine) the battery box should control temperature...therefore perhaps heat and perhaps cool as needed (depending where u live)... both when connected to grid or when parked outside/at work/wherever (at least prior to driving).
Charging at temp is also of some concern since many bulk chargers don't have temp compensation.
For all these reasons, I've been visualizing different designs and have a whole bunch of random thoughts that need to get pulled into one (drawing perhaps) place.
Some of the hardware for heating.....
Farnam heating pads, soil cable, water bed heaters (I kind like this one), RV adhesive heating pads, temp controllers....etc etc.
Some of the ideas for cooling....
Forced air in/around/through batts... Sucking air out (opposite - this has some advantages to be discussed) Getting air movement under/through etc.
Winter vs summer changes to box if any.
Distribution of heat ie Aluminum sheet.
Best materials to use..
What to line box with top, sides, bottom.
Pack voltage DC
Grid 120AC and/or 240AC
Yes, this was dumped to get you thinking... it all has to get organized somehow. I'm gonna throw out a caveat up front. Please be aware and thoughtful of others' situations and that what works in Sacramento, may not work as well in Winnipeg. There are lots of ways to skin a cat... hopefully we can gather a lot of what works and what doesn't and perhaps some new ideas all into one place since all my searching has not turned up a lot of info or consensus.
Thank you all in advance.
I'll throw out some of my ideas soon.