LiFePO4 battery build
I got my new cells in today and I am going to start putting them together after I sort out whether I am getting a new cell or not, as one has some slight damage. It is probably fine to use but betwee...
Forum Discussion
pianotuna wrote:
Stir thanks for the link.
I'm glad you posted some of the details. I can't read what ever language they have. They are close to my needs but..close only counts in horseshoes and curling.
I have done more than a few 10 day trips where the daily high was below -30.
well, that's why it is in Chinese and English. you keep fixating on the outside temperature. that has nothing to do with whether the batteries will work or not for you. well, it has an influence. It's the actual battery temperature that matters, as in the internal temp. So, with a BMS that has a built-in heat control and having the batteries in an insulated space (even one that receives heat from the rv) you would have no problem. You could have the BMS heat the internal temperature of the battery to -30 then run the furnace. As you start using the battery, they make their own heat also which warms them up even more. before I moved my 280AH batter to an interior place in my camper I had it in the uninsulated exterior storage that gets pretty darn cold and at -10C (nighttime temps) the internal temp of the battery was still above 5C so I didn't have any issues as the act of running the furnace and lights was enough to keep the battery warm. Now that it is inside the camper there is even less of an issue as it is only cold when I first go somewhere and being able to discharge at 0.25C at -30C is more than I will ever need to start the furnace and warm everything up.
