So the approval process is typically vague. I
doubt anyone is going to give you their proprietory on board circuitry.
Any LiFePO4 battery with a built in BMS should do
much the same thing. EarthX actually have two
redundant BMS built in but they are designed to
start engines and be charged in situ.
Alternatively build a pack from cells and install
an external BMS circuit board. This has the
advantage that you can manually check the BMS
performance as you have access to each cell.
LiFePO4 is currently the safest Lithium
technology but has a lower voltage per cell and
lower volumetric and mass energy than the Li-Co
lithium ion technology used in laptops, Tesla
cars, Boeing 787 (remember the fires? The company
that was subcontracted to do the BMS managed to
burn down the testing lab.) LiFePO4 ispopular in Chinese electric cars
Mike
At 08:45 AM 2/1/2019, you wrote:
From what I understand, it was looking at the
tech itself - the onboard circuitry. There was
also a bit of grandfathering since they'd been
used unofficially for a while with no
incidents. I see Sean has popped up here so
the GFA airworthiness group would be aware of
it, probably just a case of sending an email to
officially ask for approval to cad or
[email protected], then waiting some
time for a bit of investigation.Â
----- Original Message -----
From:
"Discussion of issues relating to Soaring in
Australia." <[email protected]>
To:
"Discussion of issues relating to Soaring in
Australia." <[email protected]>
Cc:
Sent:
Fri, 1 Feb 2019 08:43:27 +1100
Subject:
Re: [Aus-soaring] Lithium batteries
For a rare occasion I agree with Mike.Â
What were the evaluating criteria used to approve Fusion?
On 1 Feb 2019, at 8:33 am, Mike Borgelt
<<mailto:[email protected]>[email protected]>
wrote:
I'm sure that's nice for the Fusion dealer but
these seem to be similarly specified but with
higher allowable discharge current and similar internal protection circuitry.
The internal circuitry is designed to make the
battery "look" like a standard lead acid or gel
cell type and the EarthX brand is used in
Experimental homebuilts connected to the
charging system instead of a lead acid or gel
cell. That brand also can be used for engine
starting. They are available in Australia. There
was a good article in Kitplanes a while ago on
the manufacture and testing of those.
As the battery "looks" like a standard lead acid
no mods to the aircraft charging circuit are
necessary and any good lead acid battery charger should work.
If you try to use an intelligent LiFePO4 charger
you may get a conflict between the battery
internal protection and the intelligent charger. See that.
It would be nice to know what exactly the
approval process for the Fusion brand involved.
Mike
.
At 06:10 AM 2/1/2019, you wrote:
Same product (and same price) available at
Jaycar - although strictly speaking only fusion brand allowed at this stage?
<https://www.jaycar.com.au/12-8v-7-5ah-lithium-deep-cycle-battery/p/SB2201>https://www.jaycar.com.au/12-8v-7-5ah-lithium-deep-cycle-battery/p/SB2201
Nick.
On Fri, Feb 1, 2019 at 6:16 AM Mike Borgelt
<<mailto:[email protected]>
[email protected]> wrote:
This came in yesterday:
<https://www.techbrands.com/store/category/li-battery-feb19.aspx?utm_source=battery&utm_medium=Email&utm_campaign=TBNewFeb19>https://www.techbrands.com/store/category/li-battery-feb19.aspx?utm_source=battery&utm_medium=Email&utm_campaign=TBNewFeb19
These look good for avionics although you can't use them to start an engine.
Mike
Borgelt Instruments - design & manufacture of
quality soaring instrumentation since 1978
<http://www.borgeltinstruments.com/>www.borgeltinstruments.com
tel:Ã ÃÂ 07 4635 5784Ã Ã Ã Ã Ã overseas: int+61-7-4635 5784
mob: 042835 5784Ã Ã Ã Ã Ã Ã Ã ÃÂ Ã Ã
à à à à à à :àint+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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_______________________________________________
Aus-soaring mailing list
<mailto:[email protected]>[email protected]
http://lists.base64.com.au/listinfo/aus-soaring
Borgelt Instruments - design & manufacture of
quality soaring instrumentation since 1978
<http://www.borgeltinstruments.com/>www.borgeltinstruments.com
tel:Â Â 07 4635 5784Â Â Â Â Â overseas: int+61-7-4635 5784
mob: 042835 5784Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â :Â int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
_______________________________________________
Aus-soaring mailing list
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http://lists.base64.com.au/listinfo/aus-soaring
_______________________________________________
Aus-soaring mailing list
[email protected]
http://lists.base64.com.au/listinfo/aus-soaring
Borgelt Instruments - design & manufacture of
quality soaring instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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