My Roborock S7 once drove off its charging dock and stayed that way for several days. When I later tried to put it back on the dock, it would not charge and kept moving away from the dock. From what I found online, it seemed that the issue could be caused by a faulty resettable fuse (polyfuse), so I replaced it. After that, when I tried charging the original battery, the robot repeatedly displayed the message: "Battery error. Please try again after the battery temperature returns to normal." After a few attempts, it stopped displaying any messages, would not charge, and would not do anything at all. If I install a charged battery from another robot vacuum, the robot powers on and works normally. However, it is still unable to charge the battery. I have since reinstalled the original fuse, but the robot still does not charge. As I later realized, the original battery had probably failed, and I should have replaced the battery first before replacing the fuse. Could you please advise whether there is any way to repair my robot? What components or circuits should I check, and where should I start troubleshooting?
This is a Homeassistant Forum and not a Roborock Forum and it sounds a bit misplaced to ask hardware related issues that are irrelevant to HA here.
Moreover this does not sound like a Bug that happens because of HA and just a plain hardware issue with your vacuum bot.
How about you try Support Roborock or Reddit ?
I think the chance is higher that you find someone in there instead of here (unless you are lucky and someone had the same issue)
also: Have you put it in rice? Maybe this helps 
rice - its funny)
of course i tried to write to reddit, but community blocks my posts and i can do nothing with it.
it just chat gpt advised to write here, so maybe its not related place to find a solutions for my problem. Anyway, thank you for your reply
Despite you posting in the wrong forum, you might be in luck.
Had the same thing happen to me around 6 months ago but didn't get any battery errors, so you might have multiple issues.
However, if the charging dock has no lights at all when plugged in (aka totally dead), it not the fuse. Most likely it's the Shottky Diode as explained in this reddit post. If you have a multimeter, this is extremely simple to test - a dead short between the top & the bottom of the diode means it needs replacing.
While it's trivial to replace if you have a soldering iron, be extremely careful of the 2 large capacitors since they hold enough voltage to hurt or possibly kill you. I foolishly decided to discharge them using an isolated screwdriver, but the pop they made meant I also had to replace my underwear in addition to the diode.
Happy to report that the charger has been happily doing its job since then. The underwear has been safely discarded as I do not consider it suitable for the job any more.
EDIT: Reddit post links to this handy guide with pics. Posting it here because it's easy to miss in the flood of nested comments Schottky diode MBR5150 for Roborock S5Max charging dock repair - Uldis Melderis
Not if it got water in the internals. Works with mobile phones.
Sounds like you should invoke a warranty claim via the vendor. Fiddling with fuses, mains power and batteries for a self motivated robotic automaton let loose in your house unattended is probably not going to end well.
That must have been very violent event.
In many cases the hardware can be "regenerated" to useful condition with help of some chemicals and solvent.