Xiaomi Mi Vacuum Cleaner G9 G10 battery dissasembly red led accu broken. I don't know how to fix 

Have you used high-voltage batteries such as those for power tools? What cells did you use? I have one from a laptop and one from cordless screwdrivers.

@@CESHCESH i did not replaced my cell because one of the cell drop to 1v after leaving it for 3 months unused, and i managed to charge it up via external lithium charger. What i also learnt is that some BMS is dumb cause if one of the cell is full, then it will stop charging but does not means all the cells is full. But when come usage, if one of the cell hits the minimum voltage, the whole things stop. Hencewise, the replace the faulty battery with the equivalent capacity of what it is now. And when everything put together before charging, make sure they have roughly the same voltage, ie. 3.5v.

There are no hidden screws, I used a screwdriver to go from the side of the charging contacts and tighten. When removing the PCB, be careful because the temperature sensor soldered to the PCB is glued between the cells with white glue.

None seem compatible unfortunately. global.dreametech.com/collections/cordless-vacuum-cleaner

I think the only way is to reset the processor chip.... But I do not know how.

For now, I have bought a good battery from the Dreame T20PRO for half price and everything works. if I can solve the problem, I will return to this disassembled G9 battery. Good luck

How did you find out it is compatible with your G9 model? @@CESHCESH

try everything. I read that there is a problem with connecting the power directly to the motor with an additional switch. Brushless motors are problematic

@@CESHCESHPlease try running it wired! Would love to see it happen! :D

@@SuperBaburu For Xiaomi g9 1.5 years I use the Dreame T20 battery without any problems. When he dies, I'll have a problem to solve XD

@@CESHCESH does it still work with dreame battery?

Yes

Drill 2mm into each weld, not deep, 0.5mm is enough. then you take off the plates and bend them back. you can also try to just peel off or cut. Drilling helped and it was easy to solder with tin.

@@CESHCESH you should not solder li-ion cells. always use a spot welder. soldering will damage the cell.

Nobody has solved the problem easily yet.

Hi, did you solved your problem? I'm thinking to replacing de cells on my v9p, where did you buy the cells? Thanks

Same issue on my side. I will add another bms in parallel that will actively level the cells.

@@MrSavage77 if you add an additional BMS or replace the existing one entirely will it work?

@@cgrosuI've added a cell balancer....it seems is working, I didn;t yet measured the cells.

@@MrSavage77 can you please post for the entire 'community' the details of this upgrade? Thank you

@@MrSavage77 i would like to know too keep us updated

Can you share how-tos or videos? I also anticipated that the problem could not be solved, thank you

Did you use jtag/swd? On the socket two pins are labelled RX and TX, guess uart? What commands to send? Is it possible to solve with a black magic prober?

Максим, удалось ли победить блокировку платы? Есть решение? Спасибо.

could you pleaaase make a little DIY tutorial for us?

We are waiting

Charge the cells individually without disconnecting them from the PCB. this may help stabilize the battery.

@@CESHCESH I hope I didn't do something very wrong because I separated the batteries, got a TP4026 charging circuit, and started charging the batteries one by one.

@@muratyucedemir Unfortunately, the PCB will remember that it had no power and it will no longer work. I did the same and it doesn't work. The only hope is this battery from dreame t10/t20/pro which I have been using for 2 years and it does not break down. Maybe the cells in it can be replaced. And if not, the only option is to replace the PCB with one from aliexptess for $30, which has all errors erased and you can put any high-current cells there.

@@muratyucedemir merhaba, sorunu cozebildiniz mi?

@@burakozturk5147 merhaba, henüz çözmüş değilim

I don't know. Are you replacing the batteries with new ones or just experimenting on the board?

@@CESHCESH 2 of my batteries showed 1 V and the others 3.6v , so i tried charged 2 of it individually. After that i tested all of it, and the voltage is 26v, but my vacuum still not running and the battery indicator remains red. What should i do?

@@jarcho86 Charge them all up to 4.1v with an external battery charger. Probably 2 batteries damaged. You can replace them all with new high-current cells, such as for cordless drills. They must be high current, the usual ones didn't work for me.

@@CESHCESH okay, will do. On going charge the batteries to 4.1V . Hopefully it will work, i'll give you the update later. Thanks a lot 🙏

Update : i've got all the batteries 4.1v, total 29.06v. Still no running for my vacuum, led indicator still on red. Help me

It is best to buy a silver used battery from DRAME T10 T20 or T20pro. I bought a used one and it's been working fine for me for a year and a half. Nothing more could be done with this damn xiaomi battery.

For now, I have bought a good battery from the Dreame T20PRO for half price and everything works. if I can solve the problem, I will return to this disassembled G9 battery. Good luck

@@CESHCESH Interesting. It looks like it is impossible to change the cells in the original battery, because the controller will store the error even after longer time being disconnected.

@@CESHCESH Would you mind to open the dreame battery? I'm really interested to see the layout and components of the controller, and if it is just a copy of the xiaomi battery. Here for me they are at the same price, above 100€ like the xiaomi.

Można kupić, jak się uda to biznes "regeneracja akumulatorów" :D no bo ogniwa są sprawne. A jak się uda lub nie to 14 dni na zwrot programatora.

Sołtys S maybe something will work. I am currently using a dreame battery in this g9 and everything works. If it breaks, I'll take it apart dreame t10 battery.

Buy high-current cells for drills on Aliexpress or buy a used battery from Dreame T10, T20 or T20PRO. They don't break down.

Everything works with the Dreame t20 battery

Looks like you have locked battery controller. For now there is no way to reset or unlock it. When replacing cells you should always keep the load on the controller, this is anti-repair protection )

They were 100% charged with a cell charger before being installed in the battery.

déjà fait , je les ai chargé a 100% et rien a faire ca ne fonctionne pas .

The V9P has a different battery which may have a different chip. Honestly, I was hoping for some simple way to repair my battery.

сначала нужно дамп рабочий снять,вот в чем трабл..

@@Oymaj слежу на форуме радиокот, там ребята хотели подключиться к рабочей батарее, но пока ещё никто не сдвинулся с места. Купили новую батарею, но не знаем к каким ногам подпаиваться чтоб попробовать поиграться.

@@sunsic1 я на коте старый мембер,дело не в том куда подпаяться,с этим проблем нет,дело в том что прошивки на МК залочены,не снять дамп рабочий,подобная хрень на батареях ноутов юзалась,на картриджах принтеров,но со временем научились бороться..Возможно конечно что снятие дампа с EEPROM рабочей батареи решит проблему,но это неточно

@@Oymaj поделитесь ссылкой, пожалуйста? тоже интересна эта тема

How did u do it?

@@Biegel114 with a lipo cahrger at the en of each battery. 1 by 1

Thanks for your help, good luck

I'm also working on it. It's impossible to power it with another battery or power the motor directly, because there is also a complicated control board and motor type. We would need the software to flash the controller again so it resets. But interestingly the poster of this video said the dreame battery also works, so maybe we can analyse this battery if it's possible to reset it after changing cells.

I will consider disassembling the Dreame Battery. I must admit that you made me think. I have not seen anyone on the internet selling a Dreame vacuum cleaner with a damaged battery. I have not seen damaged Dreame batteries either. It is possible that Dreame, which produces vacuum cleaners for Xiaomi, came up with it for money. But it doesn't change much, because even if the Dreame battery can be reset and the cells replaced, the owners of Xiaomi vacuum cleaners will have to spend € 100 on the Dreame battery. Maybe you can replace one pcb component with one from Dreame, but will it be a cheap and available part that does not require buying an old Dreame battery?

@@CESHCESH After I read that you used a dreame battery, I started searching for a broken one. I didn't find any, nor did I find a complete set with broken battery. For the xiaomi it took me three days to source two broken batteries. I only found a new dreame battery for around 100€, but I already spent some time and money for the broken xiaomi ones, so that is to expensive for me. The manufacturer of the two batteries is a different one, I contacted both if they will give out the software for the controller, but of course I don't think they will. As far as I understand the pcb design of the xiaomi battery, I don't think it is intentional that it doesn't balance, because why then use an ic especially designed for that job? My guess is they screwed something up with the programming, because I think the balance chip has to communicate with the main controller. Maybe it won't help with the broken xiaomi ones, but if everyone just buys one dreame battery after the original one died, they would still be able to save a lot if its possible to rebuild them. Maybe they are a exact copy of the xiaomi battery, but with fixed code an this time working balancing, I don't know. I still find it interesting that the dreame battery works, because there seems to be some communication between battery and the motor control board, so I think it has to be matching to work. I will try to analyse the communication, but I didn't know if its possible. My preferred option would be a new battery control board, so they won't earn anything as a result of their crappy design, and we could still use the otherwise great vacuum.

@@Lukas-tc7xx I will be following Polish stores and websites for damaged Dreame batteries. Would dismantling the Dreame battery and PCB photography help? I am wondering whether to take the batteries apart because it is not easy.

I bought a used G9 vacuum cleaner in Poland for 35 € and a used T20Pro battery for 45 €. Everything works, I think it will be possible to replace the cells in this battery when it dies. This solution is the cheapest. But if I were to recommend it, definitely do not buy a new Xiaomi. Better to buy a used Dreame.

@@CESHCESH Thanks for reply!

​@@CESHCESH Thank you for your honest reply. 2 years ago, i have bought from aliexpress (MC MART Store) 2 Xiaomi G9 vacuumcleaners for 150eur each. As a gift i have got 2 x oclean teethbrushes and 2 x 4k dashcams. It was a great deal since i sold the dascams for 50eur each. After a while the batterys of both vacuumcleaners went dead. The seller told me that there were no replacement batteries at the time and returning via Aliexpress was not possible. Now i am stuck with 2 stupid vacuumcleaners and a new battery costs 93eur each. I am pretty sure if I would buy replacement batteries that i am pretty sure going to face this problem again with dead batteries. So i have read in a forum that people who left there Oclean tootbrush constantly charging, they were facing mostly damaged batteries. I only charge when empty and are very happy with my toothbrush. Could this be also the case with these vacuumcleaners? Obviously the toothbrushes and the vacuumcleaners have a overcharge protection (don't really know about electronics). As you can see, I am in the same situation i am desperate

@@ZafZap I recommend you to buy a used Dreame T10 or T20 battery. On the portal allegro.pl you can ask him for shipping to your country. This website is very safe and secure. I haven't found anybody to break it yet. I bought it and it works when the links run out, then I will try to replace them and I think this Dreame will work after replacement. Xiaomi battery does not work after replacement and I am waiting for someone to solve it. I think Xiaomi is cheating people.

@@CESHCESH Does T20Pro battery work with Xiaomi G9?

Shock, broken Dreame T20 battery was on a standard vacuum cleaner charger for a week and after a week there is no red diode. Everything works. Did the original charger balance the cells for a week?

I installed fully charged and it didn't work. Does it work for you?

@@CESHCESH Mine was never blinking red and yours?

@@Apfelsaftkotzer Mine didn't flash but the battery only lasted 3 minutes. After replacing the cells, it worked normally for about 10 days. The battery lasted 40 minutes. Then it fell and started flashing red.

@@CESHCESH I will give you further feedback in 14 Days?

@@Apfelsaftkotzer I believe that this is a special Xiaomi operation because statistically, these batteries die from half a year to a year. And dreame vacuum cleaner batteries work without a problem.

The sound is turned off because the radio in my blacksmith shop is constantly playing and there is a lot of noise.

If I buy this E Link programmer, I can easily read the firmware from a working battery and program 2 damaged ones that blink red?

bulabildinmi

Great, how to do it?

MCU HOLTEK HF5032Q + PT6111 Analog Front End for 3~8 cells

Максим, если не затруднит, можете описать чуть подробнее: удалось ли полностью в остановить работу аккумулятора? Для людей далеких от микроэлектроники, возможно, кто-то оказывает такую услугу или можно дать какое-то подробное указание мастеру в локальной мастерской?

@@DimaAlexeev Пока в процессе - надо пробовать считать прошивку с рабочего аккумулятора -для этого нужен адаптер e-Link32 или J-Link . Китайцы протокол уже взломали и делают аналоги.