Guys this thread is about Lindqvist and it's variants.
I just noticed some comments on this new YT video:
https://www.youtube.com/watch?v=_EwtD_q2rUE
Which I already tried before I saw/read it.
There are consistent comments about ruining your 12V battery by depleting it down to 7V.
While it might not destroy the battery it can reduce it's cycle life and it is understandable that somebody might want to avoid that, including myself.
There is mention about using resistors, which was one of my first methods when I tried a couple of days ago.
I used 1Ω 100W(I have that stuff lying around) and the relays would not even click.
I tried two halogen globes 50W parallel (as a series resistor) and there was some weird behaviour, would glow a fair bit than go dark again and could not initiate charge, one or two relays would only click.
So resistors won't work. I assume the voltage drops are too dynamic for the charge logic.
I tried a small flight LiPo 3s 1000mAh that was only 30% charged and connected it to the jumpstart terminals, 12V battery removed of course.
That would start the charge fine.
Even tried timing it so that the charger click is just shortly AFTER I removed the the small battery, no reset, but charge would commence at least 20 times before the LiPo was so flat that not all the relays would go on
Surely I must have gone through the sweet spot when this D-method is supposed to do it's thing, but I might have missed the chance of getting it right at that moment.
After viewing just now the video I understand that the battery is left running while different functions in the car are shut down while in Auxiliary mode.
That I didn't do but it doesn't make sense because the battery is disconnected again. I has just been drained low, nothing else.
I doubt Mitsubishi would be so sloppy that a low 12V battery would delete vital settings in the ECU/BMU simply while it is being drained.
So it seems that the actual SoC of the 12V must be the key factor, while the charge is starting up.
Anyhow rather than draining your good 12V battery to critical levels, maybe find an old 12V car battery somebody might have lying around and connect it to the jumpstart terminals start auxiliary and drain that. Chances are it is already so low to Lindqvist with it.
What I am going to do tomorrow is set up a Lab Power Supply to the jumpstart terminals and try to find the exact voltage where the charge relays barely switch on and go from there.
I know already that the charge startup process does not use more than 5A because I used an in-wire fuse with that rating when I connected the LiPo.
This was very important to protect the LiPo when the charger switches on but I always lifted the connector very quickly after the charger went on and the fuse didn't blow.
I have a Lab supply that goes to 5A and it can handle external voltage on it's output.
Will update with a result tomorrow.
