I recently found out about oppo’s supervooc charging (for smartphones)
The company puts 2 batteries in the device, so it can load them simultaneously, thus needing only half the time (actually even less)
The charger outputs 10V/5A which get pushed in 2x 5V batteries
I’m not the best in electric circuits, so sorry i’ll write complete BS
I thought, we could do that for our eskates too
Let’s say we have 2 12S batteries and a 24S bms in the board
Connect it like this:
So AC to charger
charger to bms
bms to batteries in serial
the batteries have the connection for the bms to charge, but also a connection to the vesc which you use like a loop-key
Instead of just looping one wire out and back in, you need 1 (let’s say male) plug for the 2 + wires and 1 (male) plug for the 2 - wires
you build an 1 (female) to 2 (male) plugs adapter (a bit bulkier than a normal loop key) and that’s it
you still only need 1 antispark plug, the female one
I think you should take the time to draw these diagrams out in paint or a similar software. My electronically challenged eyes and brain assumes there is some sort of formatting issue, or at least the pictures would make it more clear
I saw some videos about SuperVOOC, my impression is that they are just taking advantage for the lack of knowledge of most people to pass it as something new
The thing is, the limitation is the battery itself, it doesn’t matter if the series parallel arrangement, the speed will be the same
That being said, in a phone environment, where the cables wouldn’t be capable of handling 10A/5V, it helps
But the main innovation here is not the charging scheme, but the battery being able to take that much current, supposedly without much degradation, only time will tell
Now bringing this to our use case, it doesn’t make much sense, if you have a 24S battery, is way easier to get a 24S charger than make all the switching for 24 cells
How much current we can pass through a charge cable it’s not limited like on mini/micro USB cables
As soon as you plug in the ESC you will short the batteries and they will burn using that wiring.
For faster charging, just use a higher current charging system. Most builds aren’t charging at their battery’s rated charge current. It does reduce battery lifetime a bit to push charging rates to the limits.
I took out my Picasso skills and made a small redrawing of your drawing.
Hope like this it’s more understandable.
Maybe I got your drawing wrong, but if you first put the packs in series and than in parallel you short out your pack. Doesn’t matter how much loopkeys you use.
I don’t look at the bms at all.
Just your main power leads.
If you wire it up like you was drawing it the + of the first 12s pack is on the same connection like the - of the first pack. It’s a direct short of plus and minus.
I in general don’t see a reason for all that troubles.
Why not to get 2x12s packs, wire them in parallel and just double the charger amps.
easy peasy and takes half the time charging as well.
It’s not going to save you anything that way. You’ll be charging at half the amperage, but also charging half the cells – so the per-cell charge current will be exactly the same.
ok ähm ja…so lets come back to the basics.
If you wire up 2x 12s in parallel it’s still 12s.
I think that’s clear right?
If you have a 12s2p the charging current is going to be half half for each parallel pack.
So 8a Charger would mean 4a for one pack, 4a for the other pack.
I don’t see any problem with that.
But look the blue marked connection
easy peasy and takes half the time charging as well.