<VV> Electric Corvairs

[jvhroberts at aol.com]

 All true. And, not all Li-ion batteries are the same, nor are all charge/discharge topologies are the same. And, Li-ion battery technology is the only mainstream battery technology that isn't mature, and already it's way better than anything else, and gets better every few months. 

 

John Roberts
 

 

-----Original Message-----
From: Joel McGregor <joelsplace at earthling.net>
To: virtualvairs <virtualvairs at corvair.org>
Sent: Thu, Dec 1, 2011 4:41 pm
Subject: Re: <VV> Electric Corvairs


The car batteries are treated much better.  I think the computer in the car 
keeps the charge level between 10 and 90% or something like that.  They all have 
cooling systems for the batteries too.  Heat and over/under charging are the 
quickest way to kill Lithium-ion batteries.  Most laptops will completely charge 
and discharge the battery which supposedly shortens the life significantly.  My 
experience with laptops is that newer batteries are much worse than older ones.  
I have a Compaq R3000 that is about 8 years old and the battery is still fine.  
A lot of other laptops I've had the battery starts degrading quickly after about 
a year.  My Fujitsu charges the battery to 100% but won't start charging again 
until it drops below 92-94%.  The Fujitsu will completely self discharge in a 
couple of weeks where the Compaq only loses around 2%.  I've had much better 
luck with cell phone batteries but my phones all quit charging when the battery 
gets hot.
Corvair content:  The laptop I use to monitor/tune the Megasquirt in my '65 has 
about a 10 year old battery in it and only lasts about 2-3 minutes which is good 
enough for when the inverter drops out when I'm starting the car.
Joel McGregor
________________________________________

If lithium-ion batteries are so long lived, then why do the ones we use in
our laptops die out after 4 or 5 years?  The first one I got with my Dell
lasted a little over 4 years and the second one is already down almost 40%
in  capacity after about 3 years of use.  My usage is primarily plugged into
120 volts AC with only very occasional use on only the Li-ion battery.
What aging experience do the rest of you get with the Li-ion batteries in
your laptops??????????

Frank Burkhard
Boonton, NJ
 _______________________________________________
This message was sent by the VirtualVairs mailing list, all copyrights are the 
property
of the writer, please attribute properly. For help, mailto:vv-help at corvair.org
This list sponsored by the Corvair Society of America, http://www.corvair.org/
Post messages to: VirtualVairs at corvair.org
Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs 
 _______________________________________________