Become a Patron!
3 couples of batteries in series can act as 3 cells for the balancer?
- Thread starter Rivas
- Start date
I'm not so sure about that. I fly R/C collective pitch Helicopters and they use LiPo batteries. However, for 2 and more cells (2s, 3s, etc.) you need to have a balance charger. This charger uses a separate wire for each cell, in order to equally charge each cell. Not every battery cell is equal, thus having a different internal resistance. Therefore a different way to charge the battery pack, in order to get as balanced as possible.
Here's a picture of a 4s LiPo connected to a balance charger. The thinner wires are the balancing wires.
https://www.google.com/imgres?imgur...d=0CEEQMygZMBlqFQoTCOGUjKKDicgCFYo1PgodCsAKHg
https://www.google.com/imgres?imgur...d=0CEEQMygZMBlqFQoTCOGUjKKDicgCFYo1PgodCsAKHg
It still doesn't balance the charge. That's why there are balance chargers, controlling each cell's charge, and balancing them accordingly. For example if cell 1 has a charge of 3.8V, cell 2 a charge of 3.9V, cell 3 a charge of 3.8V, the charger would discharge 0.1V from cell 2. This is electronically controlled by the charger.
I didn't realize until now, you're asking about how to connect your LiPo to the DNA 200. Sorry! However, check on Evolve's forum.
http://evolvapor.forumchitchat.com
http://evolvapor.forumchitchat.com
Here you go https://instagram.com/p/545cYQgWPy/
I think that lipo pack is a standard rc type pack with a balance lead. (from memory, without looking it up)
So, yeah, B+ and B- are to charge. The balance lead is to hook up to a proper balance charger to get all 3 cells to a full 4.2v when charging. Instead of one @ 4.15, another @ 4.20 and the other at 4.25 volts.
I'm 99.99999% sure that mod is charging to a total voltage, not a per cell voltage since that balance lead is not hooked into anything so there is no way for it to know individual cell levels or pull power from the high cell(s).
If you don't take the charge down to too low of a level it's probably ok to balance every few days as the cells levels shouldn't wander too much but over time they will and the danger is that when charging you could be taking one cell over 4.2v and on the other side if you run it all the way down the weakest cell may be dipping down below what you would want as the lowest.
Most likely the damage to a pack in this application is over charging, I doubt people take their mods to cut off voltage often but they do fully charge just about every time.
The good thing is that you can get packs for probably about $5 from hobbyking that still have 4 times the discharge rate a mod needs. So who cares if you shorten the life of the packs because you dont balance charge at that price. You should still see long life (6mo?) and ease of use.
What a pain in the ass it would be to drag the power supply and balance charger out every time you wanted to charge lol.
If I owned a mod like that, I would probably balance once a week and call it good.
So, yeah, B+ and B- are to charge. The balance lead is to hook up to a proper balance charger to get all 3 cells to a full 4.2v when charging. Instead of one @ 4.15, another @ 4.20 and the other at 4.25 volts.
I'm 99.99999% sure that mod is charging to a total voltage, not a per cell voltage since that balance lead is not hooked into anything so there is no way for it to know individual cell levels or pull power from the high cell(s).
If you don't take the charge down to too low of a level it's probably ok to balance every few days as the cells levels shouldn't wander too much but over time they will and the danger is that when charging you could be taking one cell over 4.2v and on the other side if you run it all the way down the weakest cell may be dipping down below what you would want as the lowest.
Most likely the damage to a pack in this application is over charging, I doubt people take their mods to cut off voltage often but they do fully charge just about every time.
The good thing is that you can get packs for probably about $5 from hobbyking that still have 4 times the discharge rate a mod needs. So who cares if you shorten the life of the packs because you dont balance charge at that price. You should still see long life (6mo?) and ease of use.
What a pain in the ass it would be to drag the power supply and balance charger out every time you wanted to charge lol.
If I owned a mod like that, I would probably balance once a week and call it good.
Charge and discharge are done through the B+ and B- wires like any other charger.
The balance wires tell the charger what voltage each cell is at and they will take a very small draw on the high cells till all are even and keeps them even through the end of the charge.
The balance wires tell the charger what voltage each cell is at and they will take a very small draw on the high cells till all are even and keeps them even through the end of the charge.
Rivas
Member For 4 Years
I mean the current input for the DNA 200!
it's not said on the spreadsheet where to connect the battery to the chip for input so I guess the B+ and B- are for charging of the battery AND current input for the chip. I'm right?
