Comment on Sanity check for LiFePO4 Charger Design
Eheran@lemmy.world 1 year ago
Get a board with a TP5000. Like this one here.
Don’t charge LFP to 4.2 volt! The crude “check voltage and if below 3.6 V keep charging” is okay too as long as the maximum current is within battery spec. But measure while charging, don’t turn that off to measure the open circuit voltage.
Saigonauticon@voltage.vn 1 year ago
An international parts order is too complex for such a small thing. I’m not in the USA or China. So no TP5000 for me, got to work with what I have.
I agree, no charging at 4.2 volts. The current charger I built seems to work well enough. I ran some tests and it charges within spec. The reason I turn off the charger to measure cell voltage is because otherwise I’ll mainly be measuring SMPS noise.
Anyway it beats the charger available in the local market, which is clearly unsafe, no matter how much they assure me that it’s ‘totally OK’.
Eheran@lemmy.world 1 year ago
Perfect.