OK.. lets's talk about 24s lipo charger
I finished my setup to balance charge my 24s 3p zippy packs.
The goal is to bulk charge using my 1700W Meanwell compact charger and to finish by balancing and charging the last 14 to 15Ah.
With all these balance connectors and wires and anderson connectors, the danger to make an error and make a plasma blast is high.. so i decided that for my first experience with lipo need to be safe!!
I decided to use a DB37 connector to connect all at the same time all 4x 6s and also the current connectors ( the charger is charging at max 3A per channel at 6s ( 50W) so the pins of these connector aer perfect ( between 3 and 5A depending on the coating on the pin) Gold afre rated 5A and i'm using them.
The battery have a female DB37 and the 200W turnigy 24s charger have the male DB37.
The conversion job was not as easy as i hoped.
ALOT OD SOLDER TO DO !! and since each of the 4 channel have 9 wires that connect to teh battery it's 36 wires total.
I used 3 foot of wires ( 4 x 9 wires AWG#18 cables) so the voltage of the balance monitoring will not have a big error while current pass thru the 18 gauge wires
pin1= negative of the first 6s pack
pin 2 to 6 = balance wires
pin 9 = positive of the first 6s pack
pin10=negative of the first 6s pack
up to pin 36
NOW HOUSTON I got a big problem!!!
Stay on your chair...:
EVENTHOUGH THIS TURNIGY 4 x 6s CHARGER MEASURE INFINITE OHM BETWEEN ALL 4 individual 6s charger, and appear to be isolated... THEY ARE NOT !!!
in fact.. after i connected everything i had two charger indicating "broken connection" and error message when i tried to charge in 24s all 4 packs connected in serie!!!
I solved that but it took more time...
I know this 4 x 6s charger is in fact 4 individual charger desing in teh same casing. I decided to investigate on the 12V input section and found that it's just a parallel connection to all 4 chargers.
I cutted the traces that link all them and bought 4x 14.5V 5A power supply for 40$ total and connected all individual charger to one power supply.
Well.. after more than 11 hours of hard work i finally ahceived to make it work like i want.
IT WORK GREAT !!!!
I can now monitor and balance anc finalize the charge of all the 24s lipo with safety!!! and monitoring!!
Coming soon: multiplexing the 4 bottons of each charger (16 total) to 4 botton total ( all botton in parallel ( insulated by a relay contact)
So once i'll press to the botton of the charger no 1, all charger no 2 3 and 4 will do the same thing!!
that will decrease again the chance of error on seting up the charger for the charge and make error between every of the 4 chargers.
I have pics as well:
and video coming soon!