Recent content by Dave Knapp

The BMS says it's common port with balance. Shown are battery leads, temp sensor, and Bluetooth dongle. There is 1 vacant connector labeled Light Board.

Followed your link. Thanks. Shipped direct to Philippines, but looks a little slow. Aug 31. We'll keep our fingers crossed for a better schedule. I buy a lot of stuff from China. Sometimes it's only 10 days. Thanks again. I'll holler at ya when it comes in. Nothing to do now but have a...

Thanks for doing this leg work. Really appreciate it. The Daly BMS I have states that it has passive balancing, and came without any balancing cables. Maybe nothing else needed? I'll look online for the Battery Monitor. Not on Alibaba, though. They sent the last thing I ordered by fedex, and...

20 years in the Navy - I can handle it. Thanks for the tutorial. 2 questioins. Please tell me more about the Battery Monitor light with switch. I'm in the Philippines and sourcing it will be challenging. The more info the better. Second, I don't have balancing cables. I've seen them in a...

Well, I'm back again. With the old addage, There's no such thing as a stupid question, I feel ready to push that envelope. I have 2, 16s banks of 3.2v 150Ah Calb cells, I have 2 common port 48v, 16s, 150A Daly BMs units, one for each bank. The Daly instruction sheet is a little terse, so I...

These "cells" came physically and electrically in a pack of 4s, with busbars attached. The bottom line, to me, is will the BMS accommodate 7 of 32 cells being as much as 0.4v higher than the rest? Right now, 25 of the cells are between 3.30v and 3.35v. The highest cell is 3.72, then 3.69...

Well, after 2 weeks I'm back with an update and a plea for some guidance. I bought a bench power supply and 2 LifePO4 specific chargers. Since the batteries are physically bundled in a 12.8v bank of 4s, I used the chargers to bring them all to 13.5v. The theory was good, but the execution left...

Thanks for the reply. Since I'm a noob, I'm gonna stay conservative and charge each cell to 3.65 with a charger I'm buying on Aliexpress. It will take time, but there's virtually no risk of pilot error. Be safe.

I think that is the safest strategy, however time consuming it will be. The BMS is not connected yet, so no worries there. I'll just top off each cell to 3.65, then reassemble in 16s configuration, and hook up BMS. Thanks. There's a lot of info out there, some of it conflicting. I'll stay...

Thanks for the reply. The article is not in favor of bottom balancing, so I caught in the middle there. My plan is to use a LiFePO4 charger to charge each 4p bundle to 3.65v. Then put them back in series for 12v packs and assemble to bank (16s,2p) and the BMS and hopefully it will work.

Thanks for the encouragement. I'm in the Philippines, so Amazon is a little harder to do. I found a LifePO4 3.65v charger online here and just ordered it. It says it is specifically for LIfePO4 batteries. I was hoping that it would do the voltage control automatically since that appears to...

So, since these cells are already physically strapped together in packs of 4 cells, is the simplest way to proceed to get a CV/CC charger that will charge a pack of 4 cells in parallel to 3.65v. Daly's BMS instruction sheet, as terse as it is, says to connect the cells in parallel first, then...

Never done this before. I wasn't thinking of a power source at this stage, just wiring them up in parallel, in the bundles of 4, and letting them sit for a day - then putting them back in series and charging them in 12.8v bundles. To be honest, I wasn't prepared for this to be so complicated...

Good day. I find myself in almost the same situation as this, except that I haven't hooked everything up yet. I bought 32 CALB 3.2 v, 150 Ah cells that were bundled in fours, bound with fiberglass straps and bakelite end plates. They were arranged with every other one reversed, and had bus...

Thanks. I was hoping it would be this straight forward. Appreciate to info. Be safe.