Hier mal die Fortführung einer Unterhaltung, die ich nicht im privaten Teil weiterführen, sondern eure Kommentare darauf hören wollte. Bei Greg(ster) scheint ein selbst-entworfenes "Auf-Zell-BMS" mit dem Temperatuirsensor-Eingang des originalen (?) Ladeprints gekoppelt worden zu sein. Für mich stellt sich die Frage, ob das übertagene "Voll"-Signal digitaler oder analoger Natur ist. Meinem Anschein nach könnte es analog sein, da auch die BMS-Platinen irgendwie analog aussehen (Einstellregler!)
Hi Greg,
thanks for the video! I know a little french but not enough to follow your speech ...
But the things are very clear to me: you have NO sophisticated special charging system, but the very basic first charger, the so called "Trafolader" (transformer charger) together with a "Ladeprint" (charging PCB-board under the seat). That is all "series" and nothing special. In this way, the El was built several hundred times until the beginning 2000's. Mine from '91 had the same setup, but I soon replaced it by three separate "switch-mode" chargers, each for one lead acid batt in this time. Now I have just one modified Meanwell 1.5kW switch-mode power supply near/under the seat that charges 13 Winston LFP cells.
The only one modification to the system I could detect in your video was that the pre-owner seemed to use the wires of the former temperature sensor ("NTC sensor") to tell the "ladeprint", that one or more of the cells is fully charged. I dont know a lot about programming options of the "Ladeprint", but maybe it's possible to programm the controller in a way that charging is switched off, when a signal from the on-cell boards is coming ("normal logic") or missing ("fail-safe" logic). Maybe that was done in your case.
In case the signal is digital, you could test with just shorting the 2 wires (blue and yellow) and see whats happening. (Of course the battery has to be wired and it's voltage is "seen" at the "Ladeprints'" terminals.) Then it's possible to wire your Daly to switch off charging in the same way (but to this later, after you made the described test).
If the signal from the cell boards to the "Ladeprint" was analogue then it's more complicated and would, in my eyes, directly lead to the need of a new charger/charging system, because not many are still able to reprogram the "Ladeprint". In this case you better ask for a new replacement charger in the forum. I can't recomend my solution, because you need to "tinker" a lot in order to use the 1.5kW Meanwell supply as a "constant current - constant voltage charger".
So I would go like this:
- wire your battery cells (if not already done)
- check, that the battery voltage is "visible" from the "Ladeprint" (one cooling/metal sheet is positiv, the other one is negative)
- leave the rest wired original (eg. connection to the "Kapamesser", the capacity measuring unit)
- connect a 47k resistors between yellow and blue
*- Put the "trafo" on (plug in the charger)
- check the display lights: what happens/which one is glowing?
- is the charging starting?
- if not, replace the resistor by a 10k one, return to *
- if not, replace by 1k, return to *
- at least, replace by 100 Ohm and then 12 Ohm and return to * (don't go less than 12 Ohm to prevent burning anything!)
if none of the resistors are showing an effect, I would tend to throw the Trafo and the "Ladeprint" out and replace it with a modern charger. But let's first see your result.
Best, Lars