Battery EQ and BMS discussion.

[ClassicCrazy]

Don't know for solar - but I have a LiFePo4 48v 10ah battery on my electric bicycle and have been using it for 5+ years . I only replaced a cell or two but that was because I my charger failed and I didn't know what I was doing so messed them up. But all in all I have about 10,000 miles on that battery pack and I would say it is still 60 to 70 % of original capacity despite having it bounce around and get wet in the back carrier of my bike.  No way lead acid would ever have come close to this kind of performance.

Larry

[russ_drinkwater]

Where was that particular cell made Larry?

[ClassicCrazy]

They are called Headway cells - got them on a group purchase - at the time they were hard to come by .
Lots of places sell them now but who knows if they are all from same source .
I just did a search and found this supplier
http://www.headway-headquarters.com/lithium-lifepo4-cells/

Endless Sphere is great  place for battery and electric vehicle info
https://endless-sphere.com/forums/viewforum.php?f=14&sid=f49fbb0f722e6a339e4388db7bdad922

[russ_drinkwater]

Reason i ask is I was watching a doco on lithium salt mining in a semi-desert part of the states (can not recall exact area).
From memory it was being used for medication and battery manufacture.
Also there was not a lot of suitable areas in the states  fro lithium production.
Surely lithium cells made in the usa would be a better more reliable item than a lot coming out of china?

[Westbranch]

I assume you mean the LiFePO4 ones in use daily by a consumer and not lab variety for life....

Anyone know what the age of the oldest fully functioning lithium cell is?

[australsolarier]

russ drinkwater

that lithium mining area is in nevada. giant factory making batteries for the tesla.

as for the lasting of lithium batteries, your friend Kurt seems to have a bicycle battery he reckons he charged a 1000 times, if i remember correctly. and is still going strong. and abused into the bargain.

[russ_drinkwater]

Yeah, I know he has several different lithium packs he has picked up second hand and also purchased new.
Being in the right place at the right time, lol.
Just curious what life the lithium cells in the PC towers have as well.
Some are well designed and made to last and there is also the other end of the spectrum which is just crap and disguised
to appear as a good product. But has inferior performance and no longevity.