On Nov 19, 2015, at 9:48 AM, EVDL Administrator via EV
wrote:
> Maybe non-plug hybrid designers really don't care about battery capacity
> (though that woiuld surprise me). However, for true EVs, we definitely care
> about usable capacity.
It'll be a function of total capacity, I think. A Tesl
I haven't received the article yet, but I suspect that they use that
definition because they are more interested in SOHp, State of Health with
regard to power output for hybrid applications. This is limited mainly by
an increase in internal resistance, which results in the cells being driven
to hi
On 19 Nov 2015 at 1:31, paul dove via EV wrote:
> Instead of defining
> battery End of Life (EOL) as an arbitrary percent of capacity loss, we use the
> cycle number when the battery voltage hits 3.6V/2V (maximum/minimum) voltage
> limits. This is the practical limit of operation without reduced p
I found his list of publications at Penn State. I think I may be able to
access copies.
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No, you have to be a member. I can email it
Sent from my Verizon Wireless 4G LTE smartphone Original message
From: tomw via EV Date: 11/19/2015 8:42 AM
(GMT-06:00) To: ev@lists.evdl.org Subject: Re: [EVDL] A math formula can model
li-ion pack aging, Pyrite pack
Yes I would
Yes I would like to get a copy. Could you post a link? Thanks!
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] A math formula can model li-ion pack aging, Pyrite pack
/"According to the researchers, this new simple aging formula takes into
account only the factors shown to most influence lithium-ion battery aging
by affecting growth of the SEI layer, which include state of charge, how
often the ba
/"According to the researchers, this new simple aging formula takes into
account only the factors shown to most influence lithium-ion battery aging
by affecting growth of the SEI layer, which include state of charge, how
often the battery charges/discharges completely, operating temperature, and
cu
Hart Subject: Re:
[EVDL] A math formula can model li-ion pack aging, Pyrite pack
The elevated temperature for Li-ion performance was known method at NEDRA PIR
and Wayland invitationals like 10 yrs back. I was there and I kept telling this
what we saw in our cell tests back then. Higher death rat
The elevated temperature for Li-ion performance was known method at NEDRA
PIR and Wayland invitationals like 10 yrs back. I was there and I kept
telling this what we saw in our cell tests back then. Higher death rate
too. NMC cells from TS at that time could be preheated with high current
charging
I was speaking of performance
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> On Nov 17, 2015, at 3:29 PM, Lee Hart via EV wrote:
>
> Michael Ross via EV wrote:
>> Years ago, before improvements in testing, that may have been applied to
>> "work better," but definitely, high temps are not a recipe for "works
>> longer."
>
Michael Ross via EV wrote:
Years ago, before improvements in testing, that may have been applied to
"work better," but definitely, high temps are not a recipe for "works
longer."
This is true for *all* battery chemistries, as far as I know. Higher
temperatures always increase their amphour cap
s videos I watched. I don't remember
> details but it was during all the Leaf problems in Arizona.
>
> Sent from my Verizon Wireless 4G LTE smartphone Original message
> From: brucedp5 via EV Date: 11/17/2015 2:19
> AM (GMT-06:00) To: ev@lists.evdl.org Su
--From: brucedp5 via EV Date: 11/17/2015 2:19 AM
(GMT-06:00) To: ev@lists.evdl.org Subject: [EVDL] A math formula can model
li-ion pack aging, Pyrite pack
'Cheap-materials fool’s-gold pyrite battery'
http://www.idtechex.com/research/articles/simple-mathematical-formula-models
'Cheap-materials fool’s-gold pyrite battery'
http://www.idtechex.com/research/articles/simple-mathematical-formula-models-lithium-ion-battery-aging-8646.asp?donotredirect=true
Simple mathematical formula models lithium-ion battery aging
Nov 11, 2015 Penn-StateU,Volvo Group Trucks Technology
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