Gotway MSX Pro

went from really good deal to a fair deal :lol:
both LG M50 packs are at 0 volts, these packs have been burning down houses, might try and see if theyre salvageable

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all the caps are blown

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and 2 mosfets

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guess ill try trickle charging these batteries
 
the battery tear down got interesting, i was uploading to another forum. you can check it out here
https://forum.electricunicycle.org/topic/26868-msx-pro-bricked-m50-packs-and-fried-controller/

if the mods dont like it i can upload the pictures here instead of linking to another site
 
wound up with 14 reverse polarity cells
5 at 0 volts
4 at 3.78v
73 at 0.1 volts

going to put tinfoil and magnets on each 1s18p pack and slowly charge to see if if they can be brought back to life

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curve looks fine and nothing is getting warm

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charged it 3.3v and put it to the side
charging another one up
in order to get the tester to start on both packs i had to jumpstart the pack with another battery, tester wouldnt start at 0.1v but 0.25v it would

pack 1 took 5293mah to 3.3v/1s18p
pack 2 took 5537mah/1s18p
pack 3 took 6521mah/1s19p
 
Very strange corrosion damage on those capacitors.

Nice score on the one wheel, I know you said you got a pretty good deal on it but your still reserving spilling the beans on the price?

You must rent and not own.

goatman said:
wound up with 14 reverse polarity cells
5 at 0 volts
4 at 3.78v
73 at 0.1 volts

going to put tinfoil and magnets on each 1s18p pack and slowly charge to see if if they can be brought back to life
 
the capacitors, mosfets and B12 fuse on the bms all blew at once

i went to go and buy a nicola tesla from the guy for $300 but it was thrashed, wasnt worth $100, then he pulled this one out. the wheel was showing blown mosfets and it wouldnt turn on. he wanted $700, i only had $400 in my pocket, he accepted.

in my other ninebot thread theres a link to a video for the vesc controller in a msx euc

looks like i saved enough m50's (77) to run this wheel at 17s4p, like my bikes and boat
now i just need to buy a vesc

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I always play that trick to, when I bought the razor e200 with no good batteries who wanted $100 but I only got $80 in cash on purpose and told him I only have $50 in cash. I like to keep my eyes on the ad and see how long its up, but the posters like to delete it and repost it so you have to make notes or screen shots.
 
calab said:
Very strange corrosion damage on those capacitors.
not corrosion, is vapor-deposition of the metal that used to be the cap leads.
 
wound up just getting a new MSP board
theyre a different lay out than the original boards
have to stretch some of the wires to make the connections , which kind of sucks

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getting ready to solder the bms to the new packs to see if the bms is any good

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my battery guy has some p42a coming into stock mid may, ill be using these packs til then
 
packs wired then heat shrink and vba taped to the shell

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got everything working

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have velcro from amazon coming tomorrow for the torque pads

the wheel will be ready tuesday,
checked the weather forecast
theyre calling for snow, should be fun :lol: :lol: :lol:
heres some other people having fun :thumb:
https://www.youtube.com/watch?v=qTd39OgjeQw
 
theres a problem with both bms
if i measure the voltage from B- to C-
i was getting 5.97v, C- was Positive
unsoldered C- and put it at B-
the balance circuit is still working when fully charged, i tested it by making half the pack 0.1v lower than the other 12 groups
what would reverse the polarity of c- and not blow when the charger is hooked up?
 
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