Flying ADC 16 channel BMS 96S test

[maiks]

Thank u

[skr]

Thank you, @johu. I just want to confirm—should I remove the components marked in red (as shown in the attached image) and replace them with 10 nF or 22 nF 0603 SMD ceramic capacitors?

see pic on my "implementation", ther resistors are beneath the caps

[maiks]

see pic on my "implementation", ther resistors are beneath the caps

image.png

Thanks for the clarification. I've placed the order for the capacitors—they should arrive within 10 days. I’ll update you once they’re here

[Proton]

So..... I was doing the CAN mappings for the motor and inverter. I saved the mappings and turned off the car and turned it back on.

The screen was not showing the SOC anymore and the voltage was 309V instead of 369V.
2nd BMS was blinking slow and when I looked it is MUXSHORT...

I posted the pictures here:
viewtopic.php?p=83431#p83431

[johu]

Can you repair it, install the caps and latest firmware?

[Proton]

Can you repair it, install the caps and latest firmware?

If you can send me a screenshot with which parts to replace and a link with the parts I have to buy I can try. I tried before on 2 boards with no success.

[johu]

Well the procedure hasn't changed, you have to check the diode inside the FETs with a multimeter in diode mode.
Q1 and Q5 (BSS123) are likely culprits so check them first. Also Q52 and Q39 (ST1005SRG)

The good thing about the power on self test is that no other FETs are destroyed in a chain reaction.

It's also interesting that it started straight into the mux short. It means without even trying switch the mux something is already broken.

Now that it's not longer a "running system" it's a good time to install the latest firmware on all modules and install the caps viewtopic.php?p=83307#p83307