Today's Message Index:
----------------------
1. 02:40 AM - Re: Need to increase built-in Voltage Regulator limit by .5V (Peter Schwenn)
2. 06:11 AM - Re: Cable end crimping (Bill Allen)
3. 07:40 AM - Re: Cable end crimping (Charlie England)
4. 07:54 AM - Re: Cable end crimping (Bill Allen)
5. 10:41 AM - Small Lithium Battery Precautions (user9253)
Message 1
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Subject: | Re: Need to increase built-in Voltage Regulator limit |
by .5V
14.2 will charge a LiFePo battery but only about halfway and slowly. I use
3 Shorai LiFePo and an ultra light Micro (4ah) in a Ducati. They all share
the 4.7V requirement. Since high rates of discharge and charge, and very
low loss rate are properties of these cells, it doesn't make sense to use
half the capacity - as it wouldn't for any battery.
[I appreciate the info for EarthLink aircraft LiFePo - they are the best,
with a good controller built-in, and the fullest explanation of all details
of charging. Very expensive except that one is unlikely to destroy their
batteries.]
240-602-6931
On May 3, 2018 04:43, "Peter Schwenn" <peter@schwenn.com> wrote:
AeroElectrocutors,
Rotax 912iS internal voltage regulator cutoff is 14.2. Lithium-IRON
(LiFePO4) needs 14.7 for full and timely charge.
I can't reasonably modify the internal regulator.
Is there a reasonable way to get 14.7V?
Thanks,
Peter Schwenn
P.S. Why would I want to use a lithium-iron battery? Don't Lithium-Ion
batteries have a host of problems?
In my experience they have just one: if fully discharged (approx: <10
V) they can be difficult and slow to recover.
They don't overheat or catch fire (as LiPo, LiCoO2,...can), They
contain nothing toxic or hazardous. They needn't be charged slowly. They
can supply current rapidly. They don't require a protective or heavy
enclosure.
All battery types differ in their requirements. Lithium-Iron requires
a special charger; for balancing cells, recovery from discharge, and NOT
performing operations other types may require.
240-602-6931
6514 41st Av. U Park MD 20782
Eaa4 & Xenos N32XS @ KCGS
N16XN under construction -
Rivetless skins for Laminar Flow
http://www.schwenn.com
Message 2
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Subject: | Re: Cable end crimping |
Following on from that, I need to extend my starter motor feed, - could
anyone point me to a supplier of large but-splice connectors?
Bill Allen
On Sun, 6 May 2018 at 20:39, GLEN MATEJCEK <fly4grins@gmail.com> wrote:
> When it came time to put terminals on my battery / welding cables, I went
> to the local welding supply house. For ten bucks they would crimp whatever
> I brought in. Or, for the same ten bucks, I could have my very own hammer
> driven, bench mounted cable end crimper. Works fine, lasts long time.
>
> --
Bill Allen
LongEz160 N99BA FD51
CZ4 G-BYLZ EGBJ
Message 3
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Subject: | Re: Cable end crimping |
Your local electrical supply house.
Your local car stereo specialist.
Granger.
McMaster-Carr.
Ebay.
A short section of copper tubing.
Charlie
On 5/7/2018 8:09 AM, Bill Allen wrote:
> Following on from that, I need to extend my starter motor feed, -
> could anyone point me to a supplier of large but-splice connectors?
>
> Bill Allen
>
> On Sun, 6 May 2018 at 20:39, GLEN MATEJCEK <fly4grins@gmail.com
> <mailto:fly4grins@gmail.com>> wrote:
>
>> When it came time to put terminals on my battery / welding
>> cables, I went to the local welding supply house. For ten bucks
>> they would crimp whatever I brought in. Or, for the same ten
>> bucks, I could have my very own hammer driven, bench mounted
>> cable end crimper. Works fine, lasts long time.
>
> --
> Bill Allen
> LongEz160 N99BA FD51
> CZ4 G-BYLZ EGBJ
---
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Message 4
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Subject: | Re: Cable end crimping |
Thanks, I'll check them out.
On Mon, 7 May 2018 at 16:45, Charlie England <ceengland7@gmail.com> wrote:
> Your local electrical supply house.
> Your local car stereo specialist.
> Granger.
> McMaster-Carr.
> Ebay.
> A short section of copper tubing.
>
> Charlie
>
>
> On 5/7/2018 8:09 AM, Bill Allen wrote:
>
> Following on from that, I need to extend my starter motor feed, - could
> anyone point me to a supplier of large but-splice connectors?
>
> Bill Allen
>
> On Sun, 6 May 2018 at 20:39, GLEN MATEJCEK <fly4grins@gmail.com> wrote:
>
>> When it came time to put terminals on my battery / welding cables, I went
>> to the local welding supply house. For ten bucks they would crimp whatever
>> I brought in. Or, for the same ten bucks, I could have my very own hammer
>> driven, bench mounted cable end crimper. Works fine, lasts long time.
>>
>> --
> Bill Allen
> LongEz160 N99BA FD51
> CZ4 G-BYLZ EGBJ
>
>
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--
Bill Allen
LongEz160 N99BA FD51
CZ4 G-BYLZ EGBJ
Message 5
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Subject: | Small Lithium Battery Precautions |
Lithium batteries have low internal resistance. Unlike Lead Acid batteries, Lithium
batteries, if run down, could accept the full output capacity of the alternator.
Therefore the battery should be sized based on the alternator size.
If two Lithium batteries are installed, one big and one small, the small battery
could be charged at too high of a rate. For instance, a 60 amp alternator
could pump a full 60 amps into a 3 amp-hour Lithium battery if the battery was
completely run down. To prevent that, EarthX recommends putting a diode in
series with the charging circuit. The diode should have a voltage drop of 0.5
(Schottky diode). Lower charging voltage results in less current. Read all
about it in this document by EarthX:
https://earthxbatteries.com/dual-bus-lithium-battery-design
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=479917#479917
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