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A "Virtual Battery" for Mobile Home usage
#11
(06-05-2019, 06:52 PM)Cherry67 Wrote: Any interest on some circuit scetches ?

Certainly as I will be in Austria on a learning Holiday (not Vacation for Sean's benefit) I will pour over many diagrams and play with my arduino during my spare time. Don't worry mountain climbing and other "holiday" activity will take precedence. Big Grin

Wolf
Sean likes this post
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
            Cool
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#12
Austria ? less then 1000 km away from me.....
1 kWp in Test
4 kWh battery target - plus Mobile Home battery
Ultra low cost
Electronics ? No clue. Am machinery engineer.
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#13
(06-06-2019, 07:07 AM)Cherry67 Wrote: Austria ? less then 1000 km away from me.....
Yep flying in to Munchkin er I mean München (Munich) in the AM on the 16th from there to Salzburg on the train and then on the bus to my home town of Bad Ischl. Big Grin Big Grin Big Grin 
When I get there I will have my Frankfurter (Ein paar würstel bitte) with kren, good mustard and a Semmel at Zauners.
Can't wait.

Wolf
If 18 X 650 = 2200+mAh then we have power! 
May all your Cells have an IR of 75mΩ or less Smile
Last count as of 8/7/2019
Total Number of Cells Recorded and processed                 6149
Total Cells required for PowIRwall                                   2856
Total Cells ≥2200mAh, ≥80%, ≥35mΩ, ≤75mΩ, ≥4.12V   2760
For Info Google Drive
Not your average Wolf       
            Cool
Reply
#14
Just to Note, system ist running as i am in vacation with it.
1 kWp in Test
4 kWh battery target - plus Mobile Home battery
Ultra low cost
Electronics ? No clue. Am machinery engineer.
Reply
#15
(06-06-2019, 06:02 PM)Wolf Wrote:
(06-06-2019, 07:07 AM)Cherry67 Wrote: Austria ? less then 1000 km away from me.....
Yep flying in to Munchkin er I mean München (Munich) in the AM on the 16th from there to Salzburg on the train and then on the bus to my home town of Bad Ischl. Big Grin Big Grin Big Grin 
When I get there I will have my Frankfurter (Ein paar würstel bitte) with kren, good mustard and a Semmel at Zauners.
Can't wait.

Wolf
I love your Austrian & German food
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#16
Just to give an Update, i have Made a 10s18p block out of 3 Pedelec batteries. The converting in both directions simultaneously rund smootly. Its 36 V about 50 Ah.
4 Weeks Test in A mobile Home successful.
1 kWp in Test
4 kWh battery target - plus Mobile Home battery
Ultra low cost
Electronics ? No clue. Am machinery engineer.
Reply
#17
Real life experience has driven the combo in lots of strange but possible real life conditions.

And then the converter failed, without other notice (like fuses, smoke).

Failed hat the buck converter, its functionally dead, with life Mosfets, but obviously the IC is dead, and the input capacitors have blown....
They are marked as 50 Volts, so anything/anybody has put significantly more than 50 V there.

The usual suspicion goes to the Boost, which supplies there, but whatever i checked, i could not bring him to "confess".

In the end, it was the Buck (!!) which transferred energy from official Output (12 V) to official Input (36V), up to 0.3 Amps and up to 70 Volts.
Means it transferred energy from the ouput to the (Higher Voltage) Input - like a Boost. 

Who would have considered that ??

The answer to the secret is the IC used in the converter, a LM25116, which is capable of "Syncronous Mode". And this was enabled....
For the moment, i could disable the feature, and use the "Diode Emulation mode".

And soon i will check if the Syncronous Mode can deliver enough energy for me "Upward" - then i would have my bidirectional converter i have dreamed about.
1 kWp in Test
4 kWh battery target - plus Mobile Home battery
Ultra low cost
Electronics ? No clue. Am machinery engineer.
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