Dalathegreat - second life EV-battery

[aiole]

Läuft stabil - ich bin da nicht ganz so ängstlich, da EV-Akkus mehrfach abgesichert sind. Manche ziehen ja gleich den feuerfesten Asbestanzug an, wenn sie LiIon hören .

An deiner Powerbank-Lösung würde mich interessieren, welches Modell du verwendet hast. So etwas hatte ich auch vor, aber selbst die mit Passthrough gelabelten Varta-Banks kommen nicht ohne kurze Unterbrechung aus, so dass sie als USV ausschieden.

Die 18W-USV-Teile gibt es mit integrierten LiIon-Akkus oder zum Selbstbestücken. Gut ist, dass sie 12V für die Relais und 5V für das Lilygo bieten.
https://www.ebay.de/sch/i.html?_nkw=DC1 ... m570.l1313

Wer Interesse an einer bestückten Platine hat, kann sich per PN melden. Ein paar nackte Platinen liegen auch noch herum.

[ruffieuxh]

Ich habe diese Powerbank genommen:
https://www.ideoon.ch/de/usb-powerbank- ... 3QQAvD_BwE

Die ist aber sogar teurer als Deine USV! Die ist einfach parallel zur 12V Speisung geschaltet (Dioden nicht vergessen, sonst killt es den DC/DC Wandler)

Schema sieht folgendermassen aus:
https://docs.google.com/presentation/d/ ... sp=sharing

Deine Printplatten nützen mir leider nicht mehr viel, weil ich unterdessen bereits die SSR's mit Hutschienen Montage gekauft habe. Schade, vor etwa 4-5 Wochen hätte ich diese SOFORT genommen. Wo und wie zeichnest Du diese und lässt sie herstellen? Was kostet sowas. Ich bin da eine absolute Banause....

Vielen Dank
Heinz

[aiole]

Oh ha - ganz schön Aufwand mit ACDC + DCDC für die Powerbank. Du bist ja aber auch schon bei Version 2 . Auf Anhieb klappt das meist nie.

Stromlaufplan und Layout erstelle ich mit KiCad. Fertigung bei AllPCB in CN. Für Prototypen geht auch Fa. Aisler. 5 PCB mit Versand um die 55 Eur. Die Arbeit steckt aber natürlich im gesamten Design. Da gehen schon mal 5 (Weihnachts-)Tage drauf.

Das Hauptproblem war, die Komponenten mit ihren vorgegebenen LED-Positionen (SSR und Lilygo) so zu platzieren, dass sie in der verbleibenden Hutschienenöffnung noch sichtbar sind. Zum Schluss noch die Lochbilder für die extra Hutschienenhalter integrieren. Das Ganze kompakt, um Material und Kosten zu sparen.

btw
Ich fand, dass erst mit Dalas letztem Doku-update die Sache rund wurde. Allein den korrekten Steuerkabelanschluss zum Akku muss man erstmal rausbekommen. Der fehlende pulldown-R war auch so ein Ding. Hat er aber nun gerade gezogen.

Wo hattest du den Leaf-Akku bezogen? Wir hatten den aus Kleinanzeigen vom spezialisierten Händler an der holländischen Grenze und lagen bei <4k Eur für 40kWh.

[ruffieuxh]

Danke für die Angaben. Das bei mir ist mindestens HW V4, aber ich habe auch schon im Mai letzten Jahres begonnen. Die Kommunikation mit der Batterie komischerweise kein Problem - als ehem. KFZ Mechaniker.

Den Akku hatte ich im Sommer 23 aus UK importiert. Ebenfalls 40kWh aber ich hatte fast das doppelte bezahlt und dann kam noch der Import dazu! Da siehst Du nur, wie die Batteriepreise sinken! Ich hatte damals mehrere Angebot in eBay verglichen. Es gibt auch viele Angebote aus den baltischen Staaten.

Hast Du mir einen Link für den Händler? Falls ich wieder mal eine brauche?

Heinz

[aiole]

Hast Du mir einen Link für den Händler? Falls ich wieder mal eine brauche?

Heinz

heißt Franzen
https://www.kleinanzeigen.de/s-anzeige/ ... 1-223-1396

[ruffieuxh]

Merci viel mal!

[aiole]

anbei noch ein paar Installationsbilder. Das System sitzt in einer abseits gelegenen Scheune.
In Bild 03 sieht man den Hager-Schrank mit den Aussparungen für die 3x SSR + Lilygo-LED und unten die 18W-DC-USV. Die 2 orangefarbenen Kabel sind für den Not-Stop-Schalter, der noch rein kommt.

Akkugewicht bei 40 kWh -> 303 kg . Unten vertikal gegründet und oben seitlich an der Wand fixiert.
Alles gesteuert von einer openWB - aktuell mit sw2.1.7-patch 1.

01_Installation.jpg (527.12 KiB) 442 mal betrachtet

02_Installation.jpg (324.73 KiB) 442 mal betrachtet

03_Installation.jpg (421.63 KiB) 442 mal betrachtet

[ruffieuxh]

Super coole Installation! Gratuliere.
Du scheinst ebenfalls mehr als ein PV Anlage zu haben (Growatt).
Ich bin gespannt, wie gut das im Winter funktioniert. Im Auto kann die Batterie auch rund um die Uhr den Temperaturen ausgesetzt sein. Bei 8kW Leistung des Inverters ist das wahrscheinlich kein Problem. Aber möglicherweise verlierst Du etwas an Effizienz.

Übrigens: Ich habe mir diese Woche in node-red gleich mein eigenes Dashboard gebaut:

Bildschirmfoto vom 2025-03-29 10-56-56.png (96.95 KiB) 234 mal betrachtet

[aiole]

sehr schick. Ziehst du die topics für NR aus openWB oder aus Dalas battery emulator?

[ruffieuxh]

sehr schick. Ziehst du die topics für NR aus openWB oder aus Dalas battery emulator?

Je nachdem.... Die Batteriewerte aus dem Emulator (via openWB MQTT Broker), die Ladewerte aus openWB und die Einspeisewerte aus dem Fronius (virtueller Zähler in node-red)

Falls von interesse, hier der node-red Code. Hat mich ein paar Stunden gekostet, weil ich vorher nie mit Dashboards gearbeitet hatte.

Code: Alles auswählen

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Die übergeordneten Einstellungen wie Hintergrund etc, stellt man oben rechts ein:

Bildschirmfoto vom 2025-03-29 16-42-33.png (26.2 KiB) 140 mal betrachtet