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-   -   memory effect in lithium batteries (LiFeP04 tested) (

P-hack 08-05-2013 09:29 AM

memory effect in lithium batteries (LiFeP04 tested)
Not a deal breaker, nor do I see a large loss in capacity, yet, but there are going to be some apparent loss as state of charge gets a lot harder to compute. So next time someone says in absolute phrasing "lithium has no memory" you can say "You don't really know what you are talking about" :)

Memory effect now also found in lithium-ion batteries

Daox 08-05-2013 02:45 PM

Maybe I'm not totally understanding the article, but it doesn't seem like that big of a deal... I mean lithium batteries have been around 20 years now and we're just finding this out? It can't be a major problem.

P-hack 08-05-2013 03:01 PM

We have seen them in full-recharge applications, but not so much in hybrids.

sendler 08-05-2013 10:08 PM

Not a big deal. "a few parts per thousand". This paper only states that the memory effect is there in a tiny amount if you look hard enough for it but in practical terms, it is still a non issue.
Partial charge/ discharge use is proven to prolong useful life of these cells. You have to stay away from the last 7% on either end.
NanoTech LiFePo4 batteries such as the A123 AMP20 pouch cells are great batteries if you don't need huge discharge rates with an easy reach to 3,000 80% cycles. It will be a long time before anything significantly better comes along.

oil pan 4 08-28-2013 03:53 PM

Sounds good to me.
My evil plan for using LiFePO4 batteries as starting batteries and to run equipment with the engine off will work perfectly.

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