We are currently fiddle with a step-up boost converter trying to use a 6s lipo to charge any 10s board at about 4A. My electronics skillz are a bit rusty and I haven’t found much about the converter online. It has three potentiometers, one at the input, one in the middle to somewhat limit the current, and one at the output to set the output voltage.
Well that’s what I wanted to avoid. Since the Lipo can output a lot of amps and the step up supplies up to 1200W it could happen that I charge the cells at way more than 4A until I got the right value dialed in. Sure it’s just a matter of seconds until I’ve adjusted the right value on the trimmer but I am not sure if this is good for the cells …
Thanks @dareno i was wondering if there was a thread about it yet. i’ve had success charging with a boost converter.
used a watt meter to set the amps and volts (although i found the volts were out by .5 with the multimeter). To start with i turned the amps all the way down, then adjusted up to where i wanted, about 5-6a. but it went all the way up to 10a!
old mate who commissioned a power box from me bought a 4s by mistake and i’ve concluded that 4s is not enough. it could only charge at 2a, no where near fast enough and only 40% efficiency
I’ve done bench tests with a small 6s pack, a 2200mah. at 5-6a i got 2000mah into my board, which is fine by me
Thanks, I did step one already, tuning the output voltage. However, I do not have a wattmeter. I have just a couple of amp/voltage meters around, hence using the power resistor load. Thanks for the tip with the poti!