Xiaomi M365 Repair - BMS Fuse - Part 1
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- Опубліковано 23 вер 2024
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Xiaomi M365 repair - BMS Fuse Fault - A common fault on the Xiaomi M365 is no power. My scooter had a faulty fuse that needed replacing, follow all my video to see how i got on! Please leave me a thumbs up!
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PART 2 - • Xiaomi M365 Repair - B...
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Just a little suggestion, and first off, hat's off for getting in there and giving it a go. I would suggest you watch a few videos on soldering technique. It did clearly work this time but your solder joints are a bit dodgy if might be so bold as to say. The problem with a bad solder joint (like where you have soldered the main power wires to the battery) is that even if it looks ok when you do it, the structure of the joint will be poor and will be prone to failure down the track. For a vehicle like a scooter you really want to make sure you don't have any cold solder joints (where the wire moves as the solder cools from a liquid to a solid). Sorry for being pedantic but I think in a vehicle that your ride, you want to make sure your are safe!
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a trick on desoldering fuses or any multi pad SMD/Through hole. solder a bare copper wire across the fuse ends, then just heat the wire in the middle and both ends solder pads will melt and you can flick it off. Even works with 20 pad inline switches. Good job for not being afraid to try and repair something.
your soldering skills , so amazing
A little messy but you show me how to replace the board on the battery .Bravo Chap good Gosh! great !!!! AAA++++ Job. And change the fuse
first off nice work for a newbie , I think your a natural , anyways the reading of 3.7 is not coming from your main battery, that 3.5 is a back up battery its there for GPS, if your model has GPS or not ,it will have that back up batter , and that back up battery is direct you cant shut it off its a low drain … so its like a Cmos battery they last forever . and if you would have wanted to test for the complete voltage you have to pushed the power button on while having your tester connected to the R/B wires. After that you get the 3.7 plus what ever the main battery's voltage would be … that's only if the fuse isn't blown , but you will always see the 3.1 -3.7 because their is no on and off or no fuse placed in line for the back up .. hope you understood my explanation, sorry I'm dyslexic, so for me this comment took about an hour of struggle.
great video. realised it probably isn't the problem I've got but watched it anyway, quite entertaining
That was some true "Made in England" z-fuse soldering there Dave.
Made in England. Love it.
Ya that was unreal, and they wonder why uk made cars so so unreliable.
I have same problem like you at 13:30 minute, so you have after fuse repair 3.7V, after you make a pause and after you battery work well. I weld new fuse and made bms reset. Connect the connector to battery and all the same 3.7V. How do you solve this problem ?
Lead-free solder is a pain to solder with cheap irons, also you need to apply flux to solder and it also helps with de-soldering since it helps to distribute the heat to the board and makes the melted solder stick firmly to the iron tip and that also helps with heat transfer.
Great video... Love the honesty too
Hi thanks for the tutorial, it will help a lot of people. Where can we buy the z fuse and temperature sensor?
Good show man!!! Great confidence builder.... It'll work out
cool, you are getting really professional!
At 13:37 when you tested and it showed only 3.7v did you get to find put why? Was that yellow main connector on the motherboard connected?
Anyway love your video man you are brave!
Wow nice ..at least you have some idea of what the problem is.
It seems like you followed some kind of manual….
“And then it says that I should check the Z fuse…” And you were lucky the error was here. If it hasn’t been the Z fuse, what was the next step in the manual?
Maybe you can leave a link to the manual here?
Thank you 🙏
Seems like electric fault. If you will put a lot bigger fuse then it's should work. But good luck. You are best, love to loke thease kinda videos
Ugis Putnins Thank you for your kind words! I'll try a bigger fuse.
I don't know much about
E scooters BMS boards.
But I would think they would all read lower voltage like 3 to 9v from the discharge wires.
Because needs to be turned on by connecting the other 4 wires to the scooter wire harness.
Where a switch should turns it on.
Awesome video, well done!
Hello there where can I buy this fuse ? Please
Hey man, like pelaton "YOU SMASHED IT!" Ive been trying everything since amazons insurance company turned out shyte
youve made me feel better with your resilience & youre nearly there! Ive replaced everything and now Im going to buy a new battery mother board, if that doesnt work I'm going to set fire to it and throw it off the top floor of my mates block of flats n dance round the fucker!
Hahaha I'd set fire to it dude!!
Thanx for youre Video.
But for it is not clear which step of your multiple operations fixed the problem. I have same red 4times blink Indikation and the 3.4V at output connector. Overal voltage B0_B10 is 36.7 V.
Change the setting on multimeter down to 20 DC. that way when you re check battery voltage if it is indeed 3.7 volts the meter will stay at 3.7 volt. However if it is 37 volts your meter display will show a line of 0000000 or something indicating your measured voltage has exceeded the selected range. Without finishingthe video i am sure the multimeter is correct in it's decimal placement and you've got a soldered terminal on that battery pack loose. One of the series terminals? Yes, run around and probe lots of terminals like everywhere the BMS red thin wires connect. youll find 1 large terminal loose and only thru the BMS your making connection.
Hello, could you please let us know where you ordered the Z fuse from? Also, what is the amp of the fuse? TIA.
15amp he said
@@kianjones4954 thank you.
My temperature sensor registers 7.35. Does that mean I need to replace that? Fuse seems to work fine. Any idea where I can buy the sensor? Tried everywhere but no luck. Can it run without the sensor?
Better to use fuse socket, like i did. Once it happens again you just need to replace fuse from the socket with the new one.
idvlogCHANNEL sorry I know this is a year old but what do you mean fuse socket?
@@teddysurf He means a little thing where you place a fuse in it like a car and when it blows, you remove it and stick a new one in. I do it with my external battery, but never blown yet.
TheLondonCyclist Thank you for clarifying that, I would’ve never thought to do that on a bored but that’s an amazingly good idea.
damn thanks for this amazing idea ! I'll do that :D
I also made a video about this
You can click the link below
ua-cam.com/video/w0y9ZYRSKDk/v-deo.html
Microsurgery with a kitchen knife! Those of us willing to venture to the unknown appreciate the effort, and share the pain. Thanks for posting. When in doubt, get a bigger hammer!
Maybe a new circuit board if China can understand or fulfill request. I'd reluctantly try next bigger fuse, but not recommended as Lipo or Lifo can be dangerous. There's enough shared problem to at least start a UA-cam community and approach Xiaomi collectively. Use your combined views or subscription rates to amplify response.
Scott Mannear cheers mate. what's Lipo or LIFO? lol
Geeky Stuff On this scooter it's Lipo Suction!
Lithium ion polymer oxide battery or Lithium Ion Ferric oxide battery.
I left my scooter on the balcony for 6 month without using it or charge it. when I tried to charge it it didn't take power and the light of the charger remains green. now I have checked the battery and there is no light blinking red or blue. took the battery out but it seems all the connections are okay. the voltmetre reads 2.5 only. I checked also the Z fuse and is alright. Everything seem alright and in place but the battery does not charge.
can anyone give me a suggestion what to do to solv this?
does it need a bit of extra power to restart it again?
Heard you have to keep these type of scooters in a Charged state! If not cells die! Hope this helps
hi mr geeky, how old is your unit from the time you bought the m365 xiaomi scooter, before that had a problem in battery control board? did it just happen that your unit did not power ON? really am eager to buy a unit from my country, keep it up your videos are informative
fair play bud, love how you butchered that fuse :D watch a few soldering videos maybe before next attempt and you'll be flying!
just saw that it's broken, sorry!
You didn't get the right voltage with the meter because you didn't have the plug from the battery inserted into bms.
I hope you wrapped that battery...Good video all in all...
Hello, can you provide the link from where you bought the fuse? The exact fuse model? Thank you!
Bogdan Ristea uk.rs-online.com/mobile/p/non-resettable-surface-mount-fuses/7368757/
Geeky Stuff thanx man
I had the same problem. Wouldn't turn on, battery gave 41V on the battery itself, but 3.7 at the cable from the BMS... after pushing the reset button on the BMS, readings are 41V also on the cable from the BMS and the scooter turns on again. Didn't need to replace the fuse. So i suggest pressing the reset button first :-)
Hey Geeky Stuff. I had a similar problem with mine. My output leads said 20v, not 3v. (I'm based in Australia and almost no one has these here.) I also found the Spanish forum that explains the problem, and worked out how to solder a shunt in the fuse spot. Now I have 40v out of the battery, but it still will not turn on.
Can you post link to this topic?
Sure Grzegorz. Take a look at this thread. www.forocoches.com/foro/showthread.php?t=5305839
Also an update. I contacted youtube user MINI who makes a lot of Russian videos about the M365 and he sold me a new controller. After I changed in his new controller and replaced the fuse on my BMS board, I am up an running again.
You can see some of my problems and repair here: imgur.com/a/1gY2r
If you ever need to replace the fuse again. First ad some lead based solder to the contacts. It makes de soldering a lot easier. And lead based solder. Has more to give in the sense of vibration.
Hi everyone, I have received my scooter and it doesn't work at all since the beginning. I have never used it and it's brand new.
It doesn't turn on in any way and the battery doesn't charge at all. The light on the charger remains green, it never turns red.
I opened the bottom part and followed the instructions on this video and others I saw.
When I plug in the wire to the battery, inside the battery I can see the red light flashing only 4 times. After 4 times it stops blinking.
I saw the connections on the battery and they seemed well fused on it. No one is moving.
What do you think it could be the problem? I thought about something about the battery that doesn't work properly.
Can someone help me?
Bonjour, monsieur. J'ai un petit problème. J'ai un scooter électrique. Lors de l'installation du chargeur, puis du débranchement, cela ne fonctionne pas tant que je n'ai pas retiré la prise de la batterie, puis que je l'ai reconnectée, donc cela fonctionne, s'il vous plaît. Qu'est-ce que le problème?
Just awful soldering, that poor battery could be heard screaming during that repair. You need a proper soldering iron, 25w isn’t meant for that kind of work.
Either way glad you sorted it out, I wouldn’t trust the repair just due to the process.
Hi, can you tell me If I can buy the part that holds the bms, I mean NE-CONS-3P ROC? I just ripped one and wonder If I can buy spare. Alos I ripped the cables from the temp control. Can I repair it?
i want know information about fuse.
Do you have any experience with error code 21? I've got good voltage from the battery, but can't get rid of this error. Thanks!
Hi there.
My advise would be to replace speed controller and BMS to non Xiaomi make, as I did. My scooter had firs fault just after 20km of riding. I managed to fix it thanks to russian guys on youtube. But it developed a new fault shortly afterwards. Fixt it again and again and again, until it compleatly died. It just couldn't handle longer journeys.
I haven't done much miles on my scooter since, but it looks like mileage improved a bit. Exeleration is not as good, controler does only 350W. So fare no problems compare to original Xiaomi guts.
Good luck
Hi can you describe what controllers did you used ? Did you reused the old xiaomi m365 battery or you had to buy another one?
Hi.
Problems I had where downt po battery BMS. So I replaced it to one I bought on Amazon. Battery cels where fine. But I had to replace controller too. Xiaomi controller was fine but it works only with original BMS. There is seller L-Faster on Amazon and on Aliexpres too, I think. I boug a set, 350W controller and LCD with thumb control. They do offer thumb brake too, but I connected brake to existing one on the scooter. Controller allow you to set voltage, wheel size, revs, speed limit, power from zero or after push. Just light swich not working like advertised. But light I'm going to connect to original scooter swich.
Hope that helps.
All the best
Thank you for your reply! What bms you used to charge tha battery?
Also did you had to change the battery charger?
Hi. You don't need to change the charger if you use the same battery. It is designed for 36V battery. You need to look for 10S BMS. I bought BMS with balancer 40 amps. But 40 amps is way too much for 350W. 10-15 amps should be enough. Jus my worry was that cheap 10 amps BMS might not last too long.So don't get exited and set controller to more or less the same top speed as it was.
Do you know where I can get a replacement rubber kickstand end?
I have a old BMS with 1 Fuse. Is it possible to Upgrade / modify the BMS to 2 Fuses? I want to install a custom Firmware on my old M365.
i have a single fuse bms and i found a double fuse bms that i can buy online. Question: will it work if i replace the single fuse bms to the double fuse bms?
Do you think damaging the wrap will affect the water resistance of the pack. I need to do this repair but taking the clear wrap off a lithium battery pack not being able to put it back on scares me
Use kapton tape
Ok I have that flashing / blinking blue light but also a red led on in the plastic board next to it too??
Hello bro, is there any way i can contact you privately? I just have a problem on my scooter
its known that you should set the energy recovery system to weak via the app. This has apparently solved this issue however, most reviews state having it set to 'medium' or 'strong' whilst fully charged is what causes the problem. was your scooter fully charged? i was wondeeing if you could set it to medium or strong when the battery has drained from 100% or is that setting just producing too higher amps to cause the problem anyway regardless of what percentage the battery is at?
Not that this is my scooter or I am working on this particular problem but I believe that if the scooter has no power to turn it on or off there is no setting anything to hide medium or week because the connection needs to be made when there was power to the scooter
so, it appears that i dont get this red light on the controller part too.. i only get the blinking blue on BMS, and i reset it, it gets red for 3 seconds, and then all the scooter is dead? do i need just a fuse? or do i need more parts to buy and replace? in greece it kinda sucks we dont have service near here so i need to do this manually
Hello, thanks for your video. In my case scooter is staying on and is not powering off. It just occured but will probably remain off when battery dies. Hence i am thinking that the power button is not connecting properly. Any ideas? Thanks
I also took a video of whats going on in case you need it to help me out.
is there any video of someone changing the battery on one of these? ( a non electrician)
How long after use do you have to do this?
For me it is not charging. Output is fine. Led is not blinking. Do u know what is the reason.i checked the connections and they seems to be fine.i tried charging the other battery using the same connector and it is also charging.
My xiaomi m365 electric scooter don't turn on.
I plug the charger it show green colour only, not turn into red {not charging}
What to do..? Can you please help me for repair..?
Hi guys. I just repaired the Z fuse of my m187. The led turned blue but the scooter isn’t turning on. I tried the battery to a friends m365 and the battery works. Any suggestings what to check-fix on my m187?
Ps: when I am trying to power up the scooter the led blinks some times but the scooter remains off.
Aerialcrete .com you blew your controller board you need a new one from the top one to the button one
hello geeky stuff, have you managed to get a bms that works with original battery? have you tried thisone from the link in the video? ferry bms, looks like it could be plug and play (with 2 solderings)
ua-cam.com/video/bUwwifcmp6w/v-deo.html
Got a mi 1s 2.02km on it lost drive wil spin slowly if I put on cruise controll an I got no error codes I know it's just guessing with out seeing but any ideas
Mine is still failing. I take it apart and it works.. Then when not doing anything the blue flashing light (on BMS) switches to blue/red flashing light. No idea why.
Lol yes put a higher rated fuse in so under fault conditions the fuse won't blow but it will catch fire...love the internet knowledge
Haha really?? Oh god!
Not 100% correct answer.. Short circuit will make thousand amps..so if he added higher rated fuse-wont change a thing.
what if my bms no light even battery balancer connected? checked fuses all ok
-mi electric scooter essential
What is the exact model of the fuse? I cannot find anything around. How many amps is the original fuse? Can you give me a link to buy it? replacing it with a higher capacity fuse will probably burn the controller. Instead, I am thinking of replacing the fuse with a lamp fuse (similar to those ones used to protect high power speakers, where the fuse converts surplus current into light) or, as a last choice, with a circuit breaker switch to fix somewhere easily accessible.
Leonardo Gualano the original is 15a fuse.
This is the one I bought uk.rs-online.com/mobile/p/non-resettable-surface-mount-fuses/7368757/
Thanks, if I will get the circuit breaker or any other alternative to work properly, I will post it here.
Leonardo Gualano Yes please do :)
Just an update: I tested my original fuse on the board and it seems fine, so I did not replace it. It seems that my full battery-board is gone. I am not actually willing to substitute it as it will surely break again. It is obvious that the circuit is not well designed and the board is uncapable of handling the current generated during a break. What I did is to exclude the battery-board and power the controller directly with the battery, but this did not work as the controller went into protection (I think this happened because it did not receive the signals from the battery-board). I think I will use a raspberryPI + a new motor controller and do my own control circuit. Between this problem and other problems, such as constantly flat wheels, unsoldered connections within the battery and the accellerator getting stuck, this scooter turned out to be a total waste of money and now I can only use it for hobbies... Sorry to give you such a negative reply, but I really wish I would have bought a different brand. Just as a cherry on the cake, I have a friend with the same scooter and he is experiencing exactly the same problems...
فيديو كاذب البيماس كان في حالة جيدة من الأول نلاحض عندما كان يخرجه من مكانه بالمكبس كان يومض تارة بالأحمر وتارة بالأزرق وذلك لأن السالب كان منزوع فقط وهذا دليل على سلامته وتغيير zليس له معنى وكان سليما من الأول
Wow you are the máster
Hey I have almost the same problem but when I unplug the main powerband plug it again it spark and let me turn on the scooter only once and then goes dead again. Do you have an idea what can it be?
señores! una consulta acerca de mi patinete:
ayer por la noche circulando (tras haberle dado algo de caña), de repente emitió pitidos como aleatorios... y se apagó del todo. Ya no arranca, cero.
Al ponerlo en el cargador la luz sigue verde, no carga ni hace nada... Lo he dejado toda la noche y nada, sigue igual.
Lo he desmontado y la bateria me da 35V, así que descarto tema de soldaduras...
Lo que me mosquea es que la rueda está todo el rato en modo 'frenar'. Es como que no para de retener aún estar apagado... El patinete está comprado en Europa hace poco, por lo que debería llevar doble fusible...
qué puede ser?:confused:
What is the value of this termistor to replace it?
Why ur fuse burning, u do some change of firmware?
My scooter was stored for over 2+yrs and now it wont turn on. The battery reads 30v but it wont charge. I dont have a blinking light on my battery either.
21:03 no if it break again it mean there is an other problem. maybe an intensity regulator that's burned.
I've got 36,8v on mine between the + and - of the battery but on the connector i only have around 18v. But you have a LED that's blinking which i dont have.
hello my question my xiomi does not take gas. I opened the bottom and the battery lights up blue not blinking it is so right. he does not take gas
What's the green,white,yellow line do?
Fucked up my temperature sensor. Do I need to worry?
Hi, my battery direct output is 49 volt but bms output is 3.5 volt . How to resolve?
Any advice for someone who trashed the firmwares? I'm guessing I need all new control boards. :(
Well, I managed to flash the BMS with a STL over usb, and then the thing worked, but decided to go bank when I put it back in the case. :(
No idea what went pop when I closed it up, but hoping a new board will work fine.
Oh god! Just got to the part its gone again!!! haha!
Stuart Thomas Media Yea, bloody thing haha!
Hi guys, can I get some help, please?
Issue is, I cannot power on the scooter, it is brand new, never ridden. Was like that out of the box. Already got my money back from aliexpress and they do not want it back.
My M365 is a budged version with a 20 cell battery pack, which coincides with the 28V as it is basically 2/3 of the 40V, that I am reading on the solder contacts of the long red and black cable, that he soldered off in the video, after removing the waterproofing layer. (btw the sticker on the pack said 36V pack, but I assume that they just use one sticker for all variants)
My issue is different from his, as I am measuring 14V on the battery power cable connector (black plug, big red and big black cable). A further issue is, that the charging voltage of the charger is 42V, s this kind of contradicts my theory, unless they just gave me the wrong charger or i am missing something else.
I have also checked the usual online suggestions as spot welded connections on top of the battery pack and connection of cable going from controller to the handlebars, all seem t be fine.
I do not get any beeps or error codes from the controller, but the red LED on the battery pack is blinking 4 short times and then stops, when I connect the charging cable to the scooter.
I also tried resetting the BMS as per link below
xiaomiscooter.wordpress.com/2017/04/25/solve-the-battery-or-ignition-problems-of-your-xiaomi-scooter/
I am not quite sure, what is happening when the voltage is just halved on a battery pack between the main contacts of the packs and the power cable contacts. Not very surprising, as i am more mechanically minded, than electrically, haha.
After you take off the silicon there is a clip each side of the bms Got lucky it didn’t crack there
Can you give me a link for 15 amp fuse?
Mine keep turn off after few rides or few days. After I plugged out the red+black power cable for a while and plug in back and the plug in charger cable, the scooter able to turn on as normal. After few rides will turn off again. Anybody encounter the same issue or know how to solve this problem? Thank you very much.
How about using a car 15 amp breaker it resets after it cools off.
What to do if the bms has no light
Where it's the part 2 from this adventure serial ? :D
Timmaaaaayyy!!!
I guess problem might be Didn’t reset the BMS with the gold but after putting in the new fuse
Really bad idea to touch the board with a tongs , you easily rip off SMD parts from the board
10:22 you're putting way to much, only a little bit is needed, what's left on it is pretty much enough and you only need on one side then you can easily solder the other side once you've done the first side.
Flux mate... I can't watch soldering like this, however movie is very educational :)
😱 Like this no solder because burn the components and the pcb !!!!
This is painful to watch..
Yes bro! That was an ugly ugly fix... but a fix all the same! haha! 😂
Stuart Thomas Media haha yeah! It worked!
3:50 that's with Lead which is illegal in Europe, Lead is not alowed in Europe. Our corupted governments should not allow that to come here like that.
Did anyone see the tutorial on how to replace accelerator / throttle?
Why not disconnect the brake regeneration?
Glenn Reviews that's what I was thinking about today actual lol! I might just do that now.
не смотря на то что он знает что делает ( скорее всего прочитал в интернете ) техника исполнения просто ужас
Hi there, does anybody got an idea, where i can get the board with the Z fuse on? Something in the board seems not to work, so that the electricity flow is interrupted. I couldn't find it as a replacement part on Aliexpress. They only offer the whole battery unit for 225 Dollar. I'm thankfull for any help!
Hi. Where about are you based. I still have original BMS I replaced a while ago. And a fuse is ok on it.
Thanks for your answer. We found the problem. Everything is ok now! :-)
@Morangie what was the problem if you don’t mind me asking I’m having the same problem with my battery and I’m not sure whether it’s the fuse or the battery or the motherboard on the battery?
Just by-pass the fuse.
Mines has 2 ????
Why not contact Xiaomi directly asking for assistance. Maybe they will give you a new part for free
you're lucky this didn't blow up in your face