Today's Message Index:
----------------------
1. 08:42 AM - What's all this 'maintainer' stuff anyhow? (Robert L. Nuckolls, III)
2. 09:13 AM - Re: Re: Premature EarthX death? ()
3. 09:25 AM - Re: Re: Premature EarthX death? (Ken Ryan)
4. 09:54 AM - Re: Re: Premature EarthX death? (Ken Ryan)
5. 02:16 PM - Re: Re: Premature EarthX death? (skywagon185guy .)
Message 1
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| Subject: | What's all this 'maintainer' stuff anyhow? |
The Battery Tender Jr. (BTJr) saga continued . . .
> Recall that our BTJr charger-maintainer 'relaxed'
> 'load' of 25mA.
> Now, if this value represents the battery's
> internal leakage, then one might predict
> that the battery would self-discharge to
> less than useless in 12000mAh/25mA = 480H
> or thereabouts ~ 20 days.
After 24+ hours, the maintenance current
is down to 19mA . . . which raises another
question . . . what is the long term behavior
of maintenance current for this battery?
I'll explore that later.
Now for the second cap-check.
Watch this space . . .
Bob . . .
Message 2
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| Subject: | Re: Premature EarthX death? |
You do know there is a specific process to =9Cre-activate=9D
an EarthX battery once the discharge protection is activated, right?
Was that tried? It won=99t accept a charge until that is
completed.
-James
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
Ryan
Sent: Friday, June 19, 2020 3:27 PM
Subject: Re: AeroElectric-List: Re: Premature EarthX death?
It was never in service. It was for an unfinished project. It was about
two or three years old, I think. It had been charged periodically during
the first couple of years using EarthX recommended charger. Then at
about 2 or 3 years old I finally developed a load test system and so I
did a load test. I no longer have that record, but it tested as
expected. Then I charged it back up and it sat for a year. That's when
it was dead. I suppose it is possible that I did not charge it after the
load test. But at the price of those things and having previous
experience failing motorcycle batteries, that seems unlikely.
On Fri, Jun 19, 2020 at 12:14 PM Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
At 02:19 PM 6/19/2020, you wrote:
Thanks Bob. Now that you have pointed it out, it seems obvious that the
BMS could never protect from self-discharge!
Ken
How long had the battery been in
satisfactory service before it when
t.u.?
Bob . . .
Message 3
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| Subject: | Re: Premature EarthX death? |
I believe the charger which I bought from EarthX has that capability. What
exactly is this procedure?
On Sat, Jun 20, 2020, 08:19 <berkut13@berkut13.com> wrote:
> You do know there is a specific process to =9Cre-activate=9D
an EarthX battery
> once the discharge protection is activated, right? Was that tried? It
> won=99t accept a charge until that is completed.
>
> -James
>
>
> *From:* owner-aeroelectric-list-server@matronics.com [mailto:
> owner-aeroelectric-list-server@matronics.com] *On Behalf Of *Ken Ryan
> *Sent:* Friday, June 19, 2020 3:27 PM
> *To:* aeroelectric-list@matronics.com
> *Subject:* Re: AeroElectric-List: Re: Premature EarthX death?
>
>
> It was never in service. It was for an unfinished project. It was about
> two or three years old, I think. It had been charged periodically during
> the first couple of years using EarthX recommended charger. Then at about
2
> or 3 years old I finally developed a load test system and so I did a load
> test. I no longer have that record, but it tested as expected. Then I
> charged it back up and it sat for a year. That's when it was dead. I
> suppose it is possible that I did not charge it after the load test. But
at
> the price of those things and having previous experience failing motorcyc
le
> batteries, that seems unlikely.
>
>
> On Fri, Jun 19, 2020 at 12:14 PM Robert L. Nuckolls, III <
> nuckolls.bob@aeroelectric.com> wrote:
>
> At 02:19 PM 6/19/2020, you wrote:
>
> Thanks Bob. Now that you have pointed it out, it seems obvious that the
> BMS could never protect from self-discharge!
>
> Ken
>
>
> How long had the battery been in
> satisfactory service before it when
> t.u.?
>
> Bob . . .
>
>
Message 4
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| Subject: | Re: Premature EarthX death? |
Here is a FAQ from EarthX that includes discussion of re-charging an
over-discharged battery. I have the Optimate charger and I tried it several
times.
https://earthxbatteries.com/faqs
On Sat, Jun 20, 2020 at 8:22 AM Ken Ryan <keninalaska@gmail.com> wrote:
> I believe the charger which I bought from EarthX has that capability. Wha
t
> exactly is this procedure?
>
> On Sat, Jun 20, 2020, 08:19 <berkut13@berkut13.com> wrote:
>
>> You do know there is a specific process to =9Cre-activate=9D
an EarthX
>> battery once the discharge protection is activated, right? Was that
>> tried? It won=99t accept a charge until that is completed.
>>
>> -James
>>
>>
>>
>>
>>
>> *From:* owner-aeroelectric-list-server@matronics.com [mailto:
>> owner-aeroelectric-list-server@matronics.com] *On Behalf Of *Ken Ryan
>> *Sent:* Friday, June 19, 2020 3:27 PM
>> *To:* aeroelectric-list@matronics.com
>> *Subject:* Re: AeroElectric-List: Re: Premature EarthX death?
>>
>>
>>
>> It was never in service. It was for an unfinished project. It was about
>> two or three years old, I think. It had been charged periodically during
>> the first couple of years using EarthX recommended charger. Then at abou
t 2
>> or 3 years old I finally developed a load test system and so I did a loa
d
>> test. I no longer have that record, but it tested as expected. Then I
>> charged it back up and it sat for a year. That's when it was dead. I
>> suppose it is possible that I did not charge it after the load test. But
at
>> the price of those things and having previous experience failing motorcy
cle
>> batteries, that seems unlikely.
>>
>>
>>
>> On Fri, Jun 19, 2020 at 12:14 PM Robert L. Nuckolls, III <
>> nuckolls.bob@aeroelectric.com> wrote:
>>
>> At 02:19 PM 6/19/2020, you wrote:
>>
>> Thanks Bob. Now that you have pointed it out, it seems obvious that the
>> BMS could never protect from self-discharge!
>>
>> Ken
>>
>>
>> How long had the battery been in
>> satisfactory service before it when
>> t.u.?
>>
>> Bob . . .
>>
>>
Message 5
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| Subject: | Re: Premature EarthX death? |
Here is a guess at the charging, or lack of, problem... from a guy that has
never used the Xearth battery.
Most Li based chargers, controllers, BMS, etc. have top and bottom voltage
state sensors.
Translating this.... if the battery voltage for any reason has fallen below
the minimum value, the charge controller will essentially block any attempt
to charge the battery as it believes the battery is unsafe to charge.
The typical method to overcome this charging blockage is to trick the
controller or bypass it for a very brief period of time. And, using a
conventional charger attached to the battery in such a way, usually the
battery posts, as to put a brief charge into the battery. Enough of a
charge to get the cells voltage to rise above a minimum level. Once that
is done, usually connecting the battery to the Li charger, it will sense
that the battery is sufficiently at a safe state and begin normal
charging...
On Sat, Jun 20, 2020 at 9:30 AM Ken Ryan <keninalaska@gmail.com> wrote:
> I believe the charger which I bought from EarthX has that capability. Wha
t
> exactly is this procedure?
>
> On Sat, Jun 20, 2020, 08:19 <berkut13@berkut13.com> wrote:
>
>> You do know there is a specific process to =9Cre-activate=9D
an EarthX
>> battery once the discharge protection is activated, right? Was that
>> tried? It won=99t accept a charge until that is completed.
>>
>> -James
>>
>>
>>
>>
>>
>> *From:* owner-aeroelectric-list-server@matronics.com [mailto:
>> owner-aeroelectric-list-server@matronics.com] *On Behalf Of *Ken Ryan
>> *Sent:* Friday, June 19, 2020 3:27 PM
>> *To:* aeroelectric-list@matronics.com
>> *Subject:* Re: AeroElectric-List: Re: Premature EarthX death?
>>
>>
>>
>> It was never in service. It was for an unfinished project. It was about
>> two or three years old, I think. It had been charged periodically during
>> the first couple of years using EarthX recommended charger. Then at abou
t 2
>> or 3 years old I finally developed a load test system and so I did a loa
d
>> test. I no longer have that record, but it tested as expected. Then I
>> charged it back up and it sat for a year. That's when it was dead. I
>> suppose it is possible that I did not charge it after the load test. But
at
>> the price of those things and having previous experience failing motorcy
cle
>> batteries, that seems unlikely.
>>
>>
>>
>> On Fri, Jun 19, 2020 at 12:14 PM Robert L. Nuckolls, III <
>> nuckolls.bob@aeroelectric.com> wrote:
>>
>> At 02:19 PM 6/19/2020, you wrote:
>>
>> Thanks Bob. Now that you have pointed it out, it seems obvious that the
>> BMS could never protect from self-discharge!
>>
>> Ken
>>
>>
>> How long had the battery been in
>> satisfactory service before it when
>> t.u.?
>>
>> Bob . . .
>>
>>
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