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EarthX Battery Tester

 
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PostPosted: Wed Nov 28, 2018 4:20 pm    Post subject: EarthX Battery Tester Reply with quote

https://earthxbatteries.com/shop/optimate-lithium-battery-charger-lifepo4
The chargers EarthX sell will wait 30 minutes after charging and then check the voltage to see if the voltage has been retained. If it passes, it will wait up to 12 hours and then check again to check for excessive self discharge.
Is this sufficient to confirm that the battery is healthy or would some sort of load test also be a good idea?


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zwakie



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PostPosted: Thu Nov 29, 2018 3:47 am    Post subject: Re: EarthX Battery Tester Reply with quote

Looking at the specs that "Lithium" model seems to be identical to the model I have for my Odyssey 545 battery, it also uses the same charging/testing strategy.

Having a different model, my experience does not necessarily apply to this one, but I'd like to share it anyway as I had a similar line of thinking when I bought the thing couple of years ago:

Mine does a good job of maintaining the voltage level the battery is at and can recover from small discharge levels, but not much more than that. Mine certainly is not capable of recovering from deep discharges.

Given those 'limited' capabilities, I do a load charge test one year after bought new (I do this in spring-time), and replace it with a new battery the next year.

I want to have a high level of confidence that my battery is capable to deal with a alternator-out situation and allows me to finish the flight as planned when this happens. FYI: I have a single alternator - single battery setup and do daytime VFR only)


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PostPosted: Thu Nov 29, 2018 7:11 am    Post subject: EarthX Battery Tester Reply with quote

Hi Marcel;
Hi All;
It is for that very reason that I have two (2) twenty amp, internally regulated, permanent magnet alternators installed.
Cheers! Stu.

---


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kenryan



Joined: 20 Oct 2009
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PostPosted: Thu Nov 29, 2018 7:45 am    Post subject: EarthX Battery Tester Reply with quote

Marcel, what do you use for your "load" when you do the load test?

Ken
On Thu, Nov 29, 2018 at 2:52 AM zwakie <mz(at)cariama.nl (mz(at)cariama.nl)> wrote:

Quote:
--> AeroElectric-List message posted by: "zwakie" <mz(at)cariama.nl (mz(at)cariama.nl)>

Looking at the specs that "Lithium" model seems to be identical to the model I have for my Odyssey 545 battery, it also uses the same charging/testing strategy.

Having a different model, my experience does not necessarily apply to this one, but I'd like to share it anyway as I had a similar line of thinking when I bought the thing couple of years ago:

Mine does a good job of maintaining the voltage level the battery is at and can recover from small discharge levels, but not much more than that. Mine certainly is not capable of recovering from deep discharges.

Given those 'limited' capabilities, I do a load charge test one year after bought new (I do this in spring-time), and replace it with a new battery the next year.

I want to have a high level of confidence that my battery is capable to deal with a alternator-out situation and allows me to finish the flight as planned when this happens. FYI: I have a single alternator - single battery setup and do daytime VFR only)

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Marcel Zwakenberg
Europa XS TG || 912ULS || PH-SBR




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zwakie



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PostPosted: Thu Nov 29, 2018 7:56 am    Post subject: Re: EarthX Battery Tester Reply with quote

kenryan wrote:
Marcel, what do you use for your "load" when you do the load test?

One of these: http://www.westmountainradio.com/product_info.php?products_id=cba4


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zwakie



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PostPosted: Thu Nov 29, 2018 7:59 am    Post subject: Re: EarthX Battery Tester Reply with quote

ashleysc(at)broadstripe.n wrote:
Hi Marcel;
Hi All;
It is for that very reason that I have two (2) twenty amp, internally regulated, permanent magnet alternators installed.
Cheers! Stu.
---

Yeah, I have that on my wishlist too for that same reason but it has a little lower priority than what I am working on right now (upgrading panel to glass) as with the new panel I can last over 2 hours on battery only according to load calculations and battery specs Wink

[edit] plus: getting rid of my vacuum pump needs to be done first on my 912ULS to create the option for 2nd alternator...


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PostPosted: Thu Nov 29, 2018 10:59 am    Post subject: EarthX Battery Tester Reply with quote

Quote:

Mine does a good job of maintaining the voltage level the battery is at and can recover from small discharge levels, but not much more than that. Mine certainly is not capable of recovering from deep discharges.

Given those 'limited' capabilities, I do a load charge test one year after bought new (I do this in spring-time), and replace it with a new battery the next year.

I want to have a high level of confidence that my battery is capable to deal with a alternator-out situation and allows me to finish the flight as planned when this happens. FYI: I have a single alternator - single battery setup and do daytime VFR only)

CAPACITY equates to ENDURANCE. This is what the
e-bus is for. You can periodically shut off
the master switch, close the alternate feed
switch and then time how long your battery
will support the e-bus loads.

Not sure what a 'load charge' test would be.
The classic load test at the lead-acid battery
factory is to place so much load on the battery
that its terminal voltage drops by 1/2. This
means that the resistance of the load is equal
to internal resistance of the battery. Typical
test currents can be well over 1000 amps.

This condition is held for x seconds whereupon
voltages and currents observed must exceed
some minimum value.

A capacity test looks at useful energy available
in chemical storage. The battery is loaded with
y amps (endurance value) and time down to 11 volts
(in lead acid world) is noted. This measurement
speaks to sustaining battery only flight conditions
and is only loosely related to results of any
variation on a load test.

Lithium internal resistance is so low that the
classic Ipp (peak power load test) is impractical.
Hence, tests for x seconds at z amps (cranking
currents) are practical. Capacity testing
remains unchanged.



Bob . . .


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PostPosted: Thu Nov 29, 2018 11:15 am    Post subject: EarthX Battery Tester Reply with quote

Thank you Bob.

On Thu, Nov 29, 2018 at 11:07 AM Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:

Quote:
Quote:

Mine does a good job of maintaining the voltage level the battery is at and can recover from small discharge levels, but not much more than that. Mine certainly is not capable of recovering from deep discharges.

Given those 'limited' capabilities, I do a load charge test one year after bought new (I do this in spring-time), and replace it with a new battery the next year.

I want to have a high level of confidence that my battery is capable to deal with a alternator-out situation and allows me to finish the flight as planned when this happens. FYI: I have a single alternator - single battery setup and do daytime VFR only)

  CAPACITY equates to ENDURANCE. This is what the
  e-bus is for. You can periodically shut off
  the master switch, close the alternate feed
  switch and then time how long your battery
  will support the e-bus loads.

  Not sure what a 'load charge' test would be.
  The classic load test at the lead-acid battery
  factory is to place so much load on the battery
  that its terminal voltage drops by 1/2. This
  means that the resistance of the load is equal
  to internal resistance of the battery. Typical
  test currents can be well over 1000 amps.

  This condition is held for x seconds whereupon
  voltages and currents observed must exceed
  some minimum value.

  A capacity test looks at useful energy available
  in chemical storage. The battery is loaded with
  y amps (endurance value) and time down to 11 volts
  (in lead acid world) is noted. This measurement
  speaks to sustaining battery only flight conditions
  and is only loosely related to results of any
  variation on a load test.

  Lithium internal resistance is so low that the
  classic Ipp (peak power load test) is impractical.
  Hence, tests for x seconds at z amps (cranking
  currents) are practical. Capacity testing
  remains unchanged.  



  Bob . . .


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zwakie



Joined: 03 Aug 2009
Posts: 155

PostPosted: Thu Nov 29, 2018 1:38 pm    Post subject: Re: EarthX Battery Tester Reply with quote

[quote="nuckolls.bob(at)aeroelect"]
Quote:
A capacity test looks at useful energy available in chemical storage. The battery is loaded with y amps (endurance value) and time down to 11 volts (in lead acid world) is noted.

Thanks for correcting me Bob, and apologies for carelessly writing down he wording "load testing". I indeed meant to write "capacity testing", and the method that you describe here is exactly what I do.


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PostPosted: Thu Nov 29, 2018 3:29 pm    Post subject: EarthX Battery Tester Reply with quote

Quote:


Thanks for correcting me Bob, and apologies for carelessly writing down he wording "load testing". I indeed meant to write "capacity testing", and the method that you describe here is exactly what I do.


No problem. We're ALL interested in
precise speech for it is a fundamental
foundation of understanding.



Bob . . .


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