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[SI-LIST] Re: Use of Li-ion batteries
- From: "Dodd, Ian" <ian_dodd@xxxxxxxxxx>
- To: <ecklundt@xxxxxxxxxxx>, <shawnn@xxxxxxxxxxx>, <chockalingam_selvaraj@xxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 8 Mar 2007 12:14:05 -0800
Interesting,
I assume the Tesla Roadster all electric sports car has fans to bring
cooler air into its Li-ion battery pack
=20
http://news.com.com/Electric+sports+car+packs+a+punch,+but+will+it+sell/
2100-11389_3-6096377.html =20
Ian Dodd
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Ecklund, Tim
Sent: Thursday, March 08, 2007 11:40 AM
To: shawnn@xxxxxxxxxxx; chockalingam_selvaraj@xxxxxxxxxxxx;
si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Use of Li-ion batteries
CK,
We run Li-ion batteries at those temps in high vibration and shock =3D
environments. I would be hesitant to use off the shelf appliance =3D
batteries. See this supplier:
http://www.e-one.com.tw/
Tim
Tim Ecklund
EE Tablet and handheld Computing
www.itronix.com=3D20
12825 E Mirabeau Parkway
Spokane Valley, WA 99216=3D20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
=3D On Behalf Of Shawn Nikoukary
Sent: Wednesday, March 07, 2007 11:15 PM
To: chockalingam_selvaraj@xxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Use of Li-ion batteries
Hello CK,
=3D20
Not a good idea, it might explode. I used to live in a dry and hot =3D
place (Arizona) and I could tell that my cordless phone's Ni-Ca =3D
batteries last half as long as other states and would die a lot sooner =
=3D
too. Temperatures in car (especially near the dashboard which is =3D
directly under the sun) can reach 130-140 degrees. Best place to check
=3D would be the manufacturers websites. Here is a table for Li-Ion =3D
batteries in general:
=3D20
Check this: http://en.wikipedia.org/wiki/Lithium_ion_battery
=3D20
Storage Temperature
40% Charge
100% Charge
0 =3DB0C (32 =3DB0F)
2% loss after 1 year
6% loss after 1 year
25 =3DB0C (77 =3DB0F)
4% loss after 1 year
20% loss after 1 year
40 =3DB0C (104 =3DB0F)
15% loss after 1 year
35% loss after 1 year
60 =3DB0C (140 =3DB0F)
25% loss after 1 year
40% loss after 3 months
Source: BatteryUniversity.com[5] =3D
<http://en.wikipedia.org/wiki/Lithium_ion_battery#_note-prolong_life#_no
t=3D
e-prolong_life>=3D20
=3D20
=3D20
I hope this helps.
=3D20
Shawn Nikoukary.
=3D20
=3D20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
=3D On Behalf Of Chockalingam Selvaraj
Sent: Wednesday, March 07, 2007 9:10 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Use of Li-ion batteries
=3D20
Hi,
We are planning to use Li-ion batteries for an automobile navigation =3D
system.
=3D20
The unit will be placed on the dashboard.
=3D20
=3D20
=3D20
# I am eager to know if vibration and temperature in the =3D
vicinity of
car dashboard affects the performance/lifetime of the battery.
=3D20
# Can we use the Li-ion batteries used for day-to-day appliances
=3D
for
this purpose?
=3D20
=3D20
=3D20
=3D20
=3D20
Thanks and Best Regards
=3D20
=3D20
=3D20
CK
=3D20
************************************************************************
*=3D
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=3D20
Chockalingam.S,
=3D20
MindTree Consulting Ltd
=3D20
Bangalore, India
=3D20
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*=3D
****
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