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if the (LiFePo4) cells experience a failure, gas can come out of the cells and increase pressure in the battery container. many LiFePO4 cells have a "pressure fuse" or vent that helps failure to happen at a "single point" venting can also refer to "day to day" temperature regulation, to encourage long term cell reliability.
Users share their experiences and opinions on using heating pads for LiFePO4 batteries in cold temperatures. See different sources, prices, and tips for keeping batteries warm and efficient.
This will not work because this is a resistive load that will discharge the battery down to nothing eventually because there is no charging going on at all. So, manufacturers of commercial LifePO4 batteries can't agree on this issue. This would be a good experiment for Andy of the Off Grid Garage but it never gets cold enough in Australia.
If you have the batteries connected in parallel, they would be at the same voltage. Because they would have different. BMS, one would cut off before the other but that should be fine. The other would then continue charging (at a higher current) until it also cuts out. I built a 160Ah battery out of four LIFEPO4 cells.
lifepo4 is up there in terms of being a safe type of lithium battery but if you have a fire in your house and it starts to burn the batteries they will release hydrogen fluoride gas. HF can also be produced if water contacts the electrolyte, so spraying water around to put out the burning cells is a risk too.
One of the reasons is that batteries are advertising things like "10,000" cycles if you only discharge 50% and "2,000" cycles if you discharge 100% and "4,000 cycles" if you discharge 80%. Which fits with how most battery chemistries work - if you veer away from the top and bottom, you don't stress the chemistry so much and it "lasts longer".
I just purchased/installed 3 100AH LifePO4 batteries (SOK). They are hooked up to 320 watts solar and I'm using a Samlex Solar Charge Controller (Model scc-30ab). I reached out to Samlex to get input from them, essentially the charger works fine but one catch, it won't go into bulk/absorption unless the batteries fall below 12.4 volts for one hour.
Our Lifepo4 batteries can be connected in parallels and in series for larger capacity and voltage. Allow to be extended up to 4 in series and 4 in parallel (Max 4S4P) to get more capacity (Max 800Ah) and higher voltage (24V, 36V, 48V).
Sounds like the person replying was thinking about Li-ion type batteries. There really isn't a good setup for that type to run a 12V inverter. 3 cells is just too low a nominal voltage, and 4 is too high.
I am Planning to install simple 6 lug, 300AMP bus bars for the upper 3 batteries linked to the lower rack rack using 2/0 cable to tie the bus bars together. Batteries and cables will all be exactly the same (to the bus bars) however the bus bar lengths will have slight differences as well as the cables tying the bus bars together.