jkbrigman
10 kW
My previous bad experience blowing up a balance connector led me to realize I need a more organized and clearly laid out way to balance charge. It's bad enough that I have to disassemble the pack to balance charge - it's completely unacceptable that it's possible to destroy a balance lead connector just by plugging it in. I decided to look at a balance charging PCB and ordred one from HobbyKing.com:
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=41306
It arrived quickly from the USA Warehouse. The product is really nice: it's fully coated and silkscreened. The solder pads are gold plated. The high current cables are a good size and the connectors on the board are high quality. It's a good deal for the price - less than $10.
Yes, I realize I'm the guy who posted instructions on how to build your own balance charging cable and here I am singing the praises of a balance charging PCB. My perspective on "n00b lipo" has shifted a little. Not everyone can make their own cables, especially balance charging cable. This PCB has both the power and balance connectors in a simple, safe form factor.I still don't see this kind of balance charging as a long-term solution, even for a casual rider. The JST-XH connectors just aren't durable enough to be reliable after being plugged/unplugged hundreds of times.
(BTW: I'm still using the cables with the balance board to charge more bricks simultaneously. Installed between the balance boards and charger, it would enable simultaneous charging of up to 18 LiPo packs! So nothing gets wasted, everything is re-used...)
Here's what it looks like plugged into the iCharger:
My objective is to have no more exposed metal components when balance charging on the iCharger and leave the charging PCB permanently plugged up to the iCharger. This product achieves that objective well enough: there's a black foam piece glued to the back and all the connectors are fully shrouded. The PCB handles all the current and balancing needs with no problem. The iCharger was very happy being plugged into the board and the batteries did great with it. Here's 6 bricks being charged from the little iCharger that could:
This is great: I shouldn't have any more trouble blowing up JST-XH conectors with this nice PCB. Yay!
But...two problems remain:
1) I still have to disassemble the pack...completely...to balance charge.
2) I can't charge all nine bricks of mighty lipo simultaneously with just the one board. I can only do six, disconnect, then reconnect three bricks to charge right after those.
Now: I can cascade the boards to do five + four or three + three + three. That makes it possible to do all nine simultaneously. The currents required by that configuration are well within the rating of the PCB (30A) but it would be a mess.
So....it's at least as good as the cables . Beyond that, it's more compact, better organized and easier to see and use. It does save time futzing with the cables and it's easier to use. I can leave it connected to the charger all the time, so it saves me the time of having to hunt for a cable. I'll keep using the board - no question. It improves safety. It's compact and i can leave it plugged in. It should help the connectors on the charger last longer. What would I change? I'd remove the JST-XH connectors for all the other sizes of LiPo pack. I've standardized on 6S, so I don't need them. But I guess it's nice to have them in case I ever consider going with a different sized LiPo pack.
But I am left with the nagging feeling that this is definitely not Phat.....
There's got to be a better way...can Phat Labs rise to the challenge?
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=41306
It arrived quickly from the USA Warehouse. The product is really nice: it's fully coated and silkscreened. The solder pads are gold plated. The high current cables are a good size and the connectors on the board are high quality. It's a good deal for the price - less than $10.
Yes, I realize I'm the guy who posted instructions on how to build your own balance charging cable and here I am singing the praises of a balance charging PCB. My perspective on "n00b lipo" has shifted a little. Not everyone can make their own cables, especially balance charging cable. This PCB has both the power and balance connectors in a simple, safe form factor.I still don't see this kind of balance charging as a long-term solution, even for a casual rider. The JST-XH connectors just aren't durable enough to be reliable after being plugged/unplugged hundreds of times.
(BTW: I'm still using the cables with the balance board to charge more bricks simultaneously. Installed between the balance boards and charger, it would enable simultaneous charging of up to 18 LiPo packs! So nothing gets wasted, everything is re-used...)
Here's what it looks like plugged into the iCharger:
My objective is to have no more exposed metal components when balance charging on the iCharger and leave the charging PCB permanently plugged up to the iCharger. This product achieves that objective well enough: there's a black foam piece glued to the back and all the connectors are fully shrouded. The PCB handles all the current and balancing needs with no problem. The iCharger was very happy being plugged into the board and the batteries did great with it. Here's 6 bricks being charged from the little iCharger that could:
This is great: I shouldn't have any more trouble blowing up JST-XH conectors with this nice PCB. Yay!
But...two problems remain:
1) I still have to disassemble the pack...completely...to balance charge.
2) I can't charge all nine bricks of mighty lipo simultaneously with just the one board. I can only do six, disconnect, then reconnect three bricks to charge right after those.
Now: I can cascade the boards to do five + four or three + three + three. That makes it possible to do all nine simultaneously. The currents required by that configuration are well within the rating of the PCB (30A) but it would be a mess.
So....it's at least as good as the cables . Beyond that, it's more compact, better organized and easier to see and use. It does save time futzing with the cables and it's easier to use. I can leave it connected to the charger all the time, so it saves me the time of having to hunt for a cable. I'll keep using the board - no question. It improves safety. It's compact and i can leave it plugged in. It should help the connectors on the charger last longer. What would I change? I'd remove the JST-XH connectors for all the other sizes of LiPo pack. I've standardized on 6S, so I don't need them. But I guess it's nice to have them in case I ever consider going with a different sized LiPo pack.
But I am left with the nagging feeling that this is definitely not Phat.....
There's got to be a better way...can Phat Labs rise to the challenge?