A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

The inadvisability of charging LiFePO4 batteries below 32F/0C (akabelow freezing)



 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #37  
Old March 24th 18, 04:47 PM posted to rec.aviation.soaring
jfitch
external usenet poster
 
Posts: 1,134
Default The inadvisability of charging LiFePO4 batteries below 32F/0C(aka below freezing)

On Saturday, March 24, 2018 at 4:00:07 AM UTC-7, Jim White wrote:
When I wanted to install LiFeP04 batteries in my 27, I asked the factory
and Uli Kramer's response was as follows:

"in principle we have approved these batteries with TN 2-2008 (attached):

“3. Parts not belonging to the Minimum Equipment

• Electric equipment and its aerials may neither in themselves nor by
their mode of operation
or by their effect upon the operating characteristics of the sailplane and
its equipment
constitute a hazard to safe operation.
Every electric equipment has to be checked for reciprocal influence by
systematically
turning off and on and operating all other instruments.
The equipment and its control and monitoring devices must be arranged so as
to be easily
controllable. Their installation must be such that they are sufficiently
ventilated to prevent
overheating.“


So a battery is also an electric equipment…..

Kind regards

Uli"

TN 2-2008 applies to all Schleicher gliders.

Jim

The ASH26e Maintenance Manual, section 2.8 states that EITHER the YUASA
(or=
similar) or the Sonnenshein Dryfit A212 may be used. Nowhere does it say
O=
NLY a gel cell battery is permissible. Speaking as an electrical

engineer,
=
I consider the Odyssey PC680 to be "similar" to the YUASA in form and
funct=
ion. The LiFePO4 definitely is not and should necessitate a 337 STC for
cer=
tificated gliders like mine, not to say that it can't be done.

Tom


As neither the engine nor it's battery is required equipment in an ASH26, it appears the TN2-2008 allows the installation of an LFP starter battery, provided it meets the other requirements of TN2-2008 (which it does).
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
LifePO4 batteries for motorgliders - are we there yet? Chris Soaring 13 January 9th 16 03:43 PM
LiFePO4 Batteries on sale. [email protected] Soaring 20 December 9th 15 05:34 PM
K2 vs. StarkPower LiFePo4 batteries Fox Two[_2_] Soaring 36 April 16th 15 05:14 PM
LiFePO4 Batteries vontresc Soaring 56 June 27th 14 07:25 PM
LiFePO4 batteries JS Soaring 26 October 15th 12 02:51 PM


All times are GMT +1. The time now is 10:46 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 AviationBanter.
The comments are property of their posters.