How to build a LiFePo4 battery bank.
A lot of people dont have any idea how easy it is to build a DIY LiFePo4 12V battery so I'll post a deicent video of how to do it so people can decide for themselves if it is in there capability. ...
Forum Discussion
time2roll wrote:StirCrazy wrote:My BMS cuts charging at 1C and discharge at -10C.
I was thinking about this at work, and I may be wrong... it all depends on the BMS and how it is configured for the internal pass through of power. if it is just one line then the cold weather will kill the whole battery, but if they spent some money and used diods and did two internal paths then you could controle charging and discharge independently. I guess we would have to dig into the BMS construction to know for sure...
Steve
What would you set the Tstat relay temp at to turn on the heat pads so there is time as the temp drops to arrest the fall in batt temp before it gets down to -10C and turn it around to climb back to the Tstat set temp?
You need to know how long it takes for the heat pads to have enough effect so they get turned on in time. If you leave them on at some "low" then you need to learn how much they can do vs ambient to keep above -10C or 1C as needed.
Thinking of a desert scenario down that way where it might get cold at night but you want the batts at 1C or better at sunrise so the solar can start its work.
-10C isn't all that cold so not much margin if the temp drops fast in the night. Can the heat pads counter a fast temp drop like that? Guess you will find out and adjust as required.
