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[SI-LIST] Re: Use of Li-ion batteries
- From: "Ecklund, Tim" <ecklundt@xxxxxxxxxxx>
- To: <shawnn@xxxxxxxxxxx>, <chockalingam_selvaraj@xxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 8 Mar 2007 10:40:09 -0800
CK,
We run Li-ion batteries at those temps in high vibration and shock =
environments. I would be hesitant to use off the shelf appliance =
batteries. See this supplier:
http://www.e-one.com.tw/
Tim
Tim Ecklund
EE Tablet and handheld Computing
www.itronix.com=20
12825 E Mirabeau Parkway
Spokane Valley, WA 99216=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
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,
=20
Not a good idea, it might explode. I used to live in a dry and hot =
place (Arizona) and I could tell that my cordless phone's Ni-Ca =
batteries last half as long as other states and would die a lot sooner =
too. Temperatures in car (especially near the dashboard which is =
directly under the sun) can reach 130-140 degrees. Best place to check =
would be the manufacturers websites. Here is a table for Li-Ion =
batteries in general:
=20
Check this: http://en.wikipedia.org/wiki/Lithium_ion_battery
=20
Storage Temperature
40% Charge
100% Charge
0 =B0C (32 =B0F)
2% loss after 1 year
6% loss after 1 year
25 =B0C (77 =B0F)
4% loss after 1 year
20% loss after 1 year
40 =B0C (104 =B0F)
15% loss after 1 year
35% loss after 1 year
60 =B0C (140 =B0F)
25% loss after 1 year
40% loss after 3 months
Source: BatteryUniversity.com[5] =
<http://en.wikipedia.org/wiki/Lithium_ion_battery#_note-prolong_life#_not=
e-prolong_life>=20
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=20
I hope this helps.
=20
Shawn Nikoukary.
=20
=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] =
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
=20
Hi,
We are planning to use Li-ion batteries for an automobile navigation =
system.
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The unit will be placed on the dashboard.
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# I am eager to know if vibration and temperature in the =
vicinity of
car dashboard affects the performance/lifetime of the battery.
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# Can we use the Li-ion batteries used for day-to-day appliances =
for
this purpose?
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Thanks and Best Regards
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CK
=20
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Chockalingam.S,
=20
MindTree Consulting Ltd
=20
Bangalore, India
=20
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