well, i sent the new ebike pack out, as the new charge balance board was doing ok.
so they ran it hard, i mean really hard, charged it up fine, then ran it even harder still, till the smoke came out. i don’t know if you’ve ever seen lithium battery fires, youtube can show you, these cells have the equivalent of a few dozen laptops together, so the fire hazard was very real.
lucky, it was just the huge cutoff transistors that melted away. they must have not been fully “on” with my tap to the balancer board, as the fuses did not blow rated 250amps.
gonna be hard to remove them from the heat sink.
never seen inside one of these before.
now i know how the terminals work, can see the rest of them still attached to the PCB. i think i’ll do a breaker and shunt instead, a smart display and current monitor, and use the big contactor on the bike as the cutoff.
so looks like the smoke stayed in. all new 14x 48v 40Ah lithium cells, and a new charge balancer board. i couldnt find one that does 250amps, so i put the 50amp board to the charger, and tapped the cuttoff fet gates to the original 250A board to the motor. way more kick in the pants than i am comfortable on 2 wheels with. quantya.
these cells are 40Ah each, and supposedly the factory had to custom make them in this size again. would make a nice pack for a portable TIG welder, but instead i reubuilt this pack for an electric motorcycle. full testing tomorrow, but for now, it looks like i did it not wrong. :)
on the wrong antenna, i can still get decent pics from the International Space Station SSTV transmissions. i guess this is a short-time-trial thing, rumor is they will be sending live pics in the future?
best catch, Yuri G !!!
my dream woman, astronaut, playing with ham radio in orbit <swoon>.
this would have been a great catch, but was near direct overhead pass, and vertical antenna is deaf straight up :(
fading pass, serious doppler shift makes the frame drag to the right.
deployed the solar to power the DC3-reloaded for the pagan bunny burn 2016. good test of the setup, find things like shorter bolts are needed, weatherproof the quick-connects, the usual stuffs. some videos up on the tubez. fire pattern and lightning pattern and a close up of the crystal in magnetic suspension emitting polarized chernykov glow.
i stopped bringing any Fire to BinkyMan in 2007. i’m very pleased to have a chance to fire up an old project this weekend, “AF6MQ CWIR”. here’s the controls and solenoid on the bench all rewired and ready to be boxed. type a letter, and the flame will go “poof” in morse code. here’s a link to the original version for the crucibles legendary Fire Arts Festival (RIP).