msx pro, bricked M50 packs and fried controller

[0000]

1 hour ago, Paul A said:

https://revrides.com/products/msx-pro-mudguard?_pos=8&_sid=65d854ab8&_ss=r

Buying another mudguard was my first thought after I lost mine in a crash, but they're not very good at staying on the wheel and don't provide any crash protection in a slide or impact. Not only does the velcro-attached, ABS "full-length" mudguard provide more coverage and actually stay stuck to the wheel, but mine has also held up just fine after a good number small wrecks and slides while protecting the EUC shell.

Only reason I'm looking to get rid of it is I designed a similar 1-piece version and would rather this perfectly functional one not go to waste. That said, it's no worries if goatman isn't interested.

Edited April 26, 2022 by Vanturion

[goatman]

im ok for the mudguard

i printed this one for a msx but it didnt fit

https://www.thingiverse.com/thing:4564620

anyone local want a free black msx mudguard?

then i printed this one, like what Paul linked to

https://www.thingiverse.com/thing:4234328

i like using my printer 

[Paul A]

Goatman, nice to see you are offering the mud guard for free to anyone who may need one.

Great work on the knowledgeable posts, am sure many members are finding them beneficial, thanks.

[goatman]

i ride the wheel everyday and charge it everyday, even if i only go 5km

gone 120km in 2 weeks for a total of 170 km on the packs

opened up the 30q pack 

all groups were at 4.17v except for the 13s group, it was at 4.32v, so i drained it down to 4.17v

opened up the vtc6 pack all groups were at 4.17v except

from b3 to b4 it was 4.11v

13s group was at 4.21v

drained 13s to 4.17v

topped up b3-b4 to 4.17v

going to use it for another week and open it up again 

the 13s group bleed down resistors  arent working on either pack 

and/or

the bms is draining down all the other cell groups like it did to the original lg m50 cells

actually, ill go throw it on the charger and see whats happening

i know the vtc6 cells were in excellent condition, capacity was matching and they sat for a year at 4.09v without any self discharge

edit

also the wheel got a little rained on while i was at work and i lost my headlight and flashing headlight but not the tail light or led's

Edited May 1, 2022 by goatman

[goatman]

just checked the vtc6 pack, think i put on 80km's this week, charge everyday but in the morning so its not sitting balancing.

all groups are at 4.17v except

b3 to b4 was at 4.32v

itried jumping B- to C- to see if that resistor would kick on but it didnt

last week when all the cells were 4.17v except 13s p-group was 4.21v

b3 to b4 was 4.11v,  very strange

drained it down to 4.17v

ill go check the 30q pack now. actually im going to snip the bms leads on the vtc6 pack first and see what happens with those p-groups next week.

wound up snipping only the odd number leads b1,b3 etc

this time the 30q pack s13 p group was at 4.27v, last week was 4.32v

all the rest 4.17v

drained it to 4.17v and snipped the odd leads

Edited May 9, 2022 by goatman

[alcatraz]

Be careful.

[goatman]

i think i remember reading somewhere that lithiums are actually good to 4.5v

hopefully my p42a cells show up soon