The battery builders club

How-Tos & Esk8 mechanics
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#203

You probably wont notice anything, especially if you use a really big soldering iron like 150w and do it fast, but it can get messy with that many wires and lots of solder

#204

Just use a hair dryer or a ligher

@BCoad I have but Im in Croatia and it would probably take a week or two to get thereā€¦

#205

@Acido so youā€™ve used the silicon repair tape to insulate your battery?does it work,?

#206

When my cells get damaged i use the 18650 cell shrinkwrap

No, I have never used that tape or any tape to insulate my cells

2 Likes
#207

Ahh i think i misread your post thanks anyways i pretty much decided to wait for the fishpaper (dont really feal like being the one to try that stuff for science) :+1:

#208

just stumbled on this last night, active cell balancers. unlike bms, which bleeds off excess charge via resistors at full charge, these things transfer charge from cell to cell if it detects drift beyond 0.1v. and it does it at a pretty high rate of 1a.

https://www.youtube.com/results?search_query=active+battery+balancer

immediately ordered one to test.

has anyone used one of these before?

i really want to stop using bmsā€™ - theyā€™re so goddamned finicky.

14 Likes
#209

Iā€™ve ordered one as well. Iā€™ve got a 12s6p Im building currently, hopefully this will get here in time to test on this pack.

2 Likes
#210

I ordered one 6s and 13s as well. I think soon we get some good information about them :sweat_smile:

2 Likes
#211

oh shit, thereā€™s a post. sorry, should have searched.

anyway, letā€™s see how it goes.

1 Like
#212

No problem. Itā€™s good that we have this in this thread as well.

#213

Awesome. Thought they were more expensive. What u think of skipping the bms and just using this

@KfromtheBay @ducktaperules wouldnā€™t he have been fine if heā€™d had the fuse put on the side with the battery in the diagram above. And that wouldā€™ve disconnected and not rely on the individual cell fuses. All the cell fuses seem a risk if they were to break off in the battery and float around

3 Likes
#214

Why no 10s on these active balancing boards :joy:

#215

Do ten on the twelve

1 Like
#216

if you ask the chineese will make it :smiley:

1 Like
#217

You can just skip the ports you donā€™t need. Thatā€™s what as min the supplier said. So 13s work for everything below that.

2 Likes
#218

Oh I like this Idea :astonished:

#219

right, my understanding is unlike a bms that needs total pack voltage to start balancing, these balancers are looking strictly at each cellā€™s voltage. thatā€™s why it works for all chemistries.

1 Like
#220

So, Iā€™ve built a few batteries, all with a BMS. Im finding it difficult to decide if this cell balancer should be on while charging directly to a packs pos & neg leads or charge to 80% and then turn it on/connect it. Any ideas?

#221

not sure, i donā€™t have nearly enough experience to even guess.

2 Likes
#222

me either, I guess we will figure it out :slight_smile:.

1 Like