Charging Li-Ions batteries

pianotuna wrote:

StirCrazy wrote:

vermilye wrote:

pianotuna wrote:
DAMHIK that Li can't withstand freezing. Where I live, leaving them disconnected may not work.

According to Battleborn the considerations for my lithium batteries are: Don't charge under 32°F, don't draw power from them under -4°F, and there is the possibility of damage to the battery case if there are vibrations when temperatures are under -15°F.

you messed me up with the american temps. -4F is -20C . who wants to camp when its that cold anyways. and that is the min temp for discharging under use. I found this link on Amazon.ca so the LifePO4 cells are in canada now, although we are getting the usualy rip off on pricing.

280ah cells

now I have to do some serious thinking I need to replace 4 6V batteries in my 5th this spring. if i go LA then I want to increase to 6 batteries at 240/battery for 235 ah would be 1440.00 for about 350ah usable. if I went Sio2 then it would be a bit more weight on the tounge and be 2-3000 for that 350ish usable AH . or for 1899, plus 100.00 for a real good BMS that does auto ballancing and everything, and a bit of DIY making a case out of material I have in the garage I would have 448 usable AH of Li at 1/6th the weight and 1/4 the size of my set up I have now. plus I could move them from the front "generator" compartment and ut them in the basment right beside the inverter and they would be heated there.

tough choice, I know I am knocking SIO2 out right away, there just to expensive and the benifits done warent them over a normal battery yet. if the price would come down to where they are competitve they might be a good option.

Did you have to change your converter for the LI batteries?

Steve

Hi Steve,

If you want CHEAP drop in lifep04 then surf here:

https://ablithium.com/

I got a quote of $400 Cdn for a 100 amp-hour jar with BMS.

The only li chemistry that would work for me is Lithium Titinate and they are an arm and a leg and your first born child.

vermilye did not mess up on temperature conversion. At -15 F the BB batteries may suffer vibration damage. That is NOT what happened for me.

As to camping at -20, I enjoy it and do it on a regular basis. It is all about being prepared and modifying your RV so that there are no issues.

Hi vermilye,

I believe BFL13 ran his microwave from ONE SiO2 at 20% state of charge. The inverter didn't like it much. I suspect that Li may be able to do that, too.

Never said he messed up, I said me messed me up posting the american temp and I had to figure out what it was. been to long since I used american temps.. grade school is when canada switched over to metric... its actualy funny miles, feet inches and such I still prefer standard imperial, but for some reson I like metric better for temp..

yes LI can run somthing like that right down to around 10% because of it more constant voltage as it discharges it wont set off the low voltage alarm in the inverter. that alarm is how I actualy found out my 6V GC batteries need replacing. At 50% I can normaly run the microwave with out setting the alarm off , this last trip at 80% it was starting to go off so after 14 years its time for new batteries. I am just torn between getting new GC batteries and increasing the number from 4 to 6 or 8 or going with the LI. that one you posted is a good price for some one that wants 100ah but for the link I posted it works out a little cheeper to make your own and get 560ah out of two batteries but if you can build them thats a deicent price. wish I would have seen that before I bought the GC batteries for my camper. heck if SIO2 were say 100 bucks ore than normal GC batteries they would be a no brainer also. not getting the size or weight savings that I would get with LI, but getting the higher discharge capability somewhere in between.

Ill have to look into Lithium Titinate never hear of anyone using that yet so I dont know what there about.

Steve