How to increase the life of your lithium batteries

Created this video a year ago, and I think it has been buried under my most recent videos. Most of the information and references in this video could be very helpful to some of you. Let me know if it helps :D

January 14, 2020 Not so fast: Some batteries can be pushed too far
by Mike Williams, Rice University

Partial extract:

Intentional defects in batteries have given Rice University scientists a window into the hazards of pushing lithium-ion cells too far.
New simulations by Rice materials scientist Ming Tang and graduate student Kaiqi Yang, detailed in the Journal of Materials Chemistry A, shows too much stress in widely used lithium iron phosphate cathodes can open cracks and quickly degrade batteries.

Click to expand...

Looking at the temperature table, tends to contradict somewhat, what the CEO of battleborn stated. He said that the batteries preferred around 21degC, but the chart in Will's vid, it suggests a greater degradation, whether at 40% soc or 100% soc at temps above 0degC.
Unless, this is the difference between simply storing a battery and actually cycling it regularly?
This is why there is so much confusion. :-(

Will Prowse said:

Created this video a year ago, and I think it has been buried under my most recent videos. Most of the information and references in this video could be very helpful to some of you. Let me know if it helps :D

Click to expand...

Is it Throwback Thursday, @Will Prowse ? I don't think so.

The issue goes back to the BMS's that ppl are buying .. I will say that 99% of the BMSs do NOT allow you to set the MAX charge voltage and thus NON-Programmable BMS's charge at 100% ... but then again thats sort of OK ... with a fast as all of these chemistry's are changing and being developed, 5 years from now LiFePO4 will have gone the way of AGM ...

BUT with that said - we/YOU should NEVER take your eye off the "FIND THE PERFECT BMS" ball ...

The main idea I get from reading trough the forum and watching Will's videos, is that heat is the main factor that influences lithium batteries life.
So what's preventing people from adding active heat dissipation to their battery banks?!
I am no engineer, but I guess is not that difficult or costly to add active heat dissipation to a battery bank, specially to one that will get heavy usage.

Maybe something like this: (perhaps in a bigger scale)

Can you guys give an input if it could be useful for keeping a low temperature on a battery bank container?

Navig8tor said:

The main idea I get from reading trough the forum and watching Will's videos, is that heat is the main factor that influences lithium batteries life.
So what's preventing people from adding active heat dissipation to their battery banks?!
I am no engineer, but I guess is not that difficult or costly to add active heat dissipation to a battery bank, specially to one that will get heavy usage.

Maybe something like this:

(perhaps in a bigger scale)

Can you guys give an input if it could be useful for keeping a low temperature on a battery bank container?

Click to expand...

Totally useful ... #1 killer of LFP is heat ...

But it does take allot of heat to get the LFPs to get angry at you ... at work 158F is our shutdown the battery program although I have ran emergency equipment to 175F and the batteries was hot but still smiling at me ,,,,

So if you keep the batteries in a vented area where heat can escape and go no more than 1C -- that will probably be sufficient ...

With that said -- if we are running anything over 400aH and will be doing 2C discharge -- we will mount (2) computer fans on a thermal switch above the batteries to blow down to kick on at 145F (most LFP's start acting funny at 70C/158F)

BUT those are just our guidelines ...

What you could do is simply put a thermoter or FLIR to the battery and run it "hard" to see what temps you get ...