Electronics > Beginners
2s Life Charger
beanflying:
3am here and just had a visit on the roof by some very noisy Possums in heavy shoes |O but I Re found an old thread I made using the Mornsun modules and in that case LiPo 1S boards but LiFe boards would sub in just the same. https://www.eevblog.com/forum/projects/multi-cell-lithium-charger-from-a-single-5v-supply/msg1454259/#msg1454259
The Mornsun modules are effectively isolated power supplies because of this you can power them ALL from a common low voltage supply to power the 1S boards. The outputs of the 1S charge boards are then all isolated electrically from each other. Because of that you can gaisy chain these outputs and charge each cell by hooking up to them when the cells are in series. That is hook the positive of one 1S board into the ground of the next and so on.
If this doesn't make sense I will sketch up a wiring diagram of some sort when I wake up after hopefully some sleep.
Dave Wave:
In terms of hooking the 1s boards in a daisy chain....are you talking about the outputs?
I would appreciate a diagram if you have time.
I found the part on ebay and ordered up a couple.
Thanks for the help!
-Dave
beanflying:
What you are creating is two floating power supplies with chargers attached to their outputs. So if you used just te Mornsun modules without the chargers you could create a 10V output from a single 5V supply by hooking the positive of one with the negative of the other like a conventional dual power supply.
So after adding the chargers Negative Charger board 1 goes to pack negative and positive goes to the positive of the first cell which is also the junction with negative of cell 2. The Negative of Charger board 2 goes to the junction between the cells and then the positive goes to pack positive or the positive of cell 2.
Dave Wave:
Got it.
Thanks for the help.
Ill give it a go when the parts come in.
-Dave
beanflying:
No probs. Handy modules for all sorts of jobs :)
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