Catalin wrote: ↑Wed Mar 19, 2025 6:26 am I get nothing, no output or communication frame. I’ve tried different setups but nothing…I tend to belive is dead for good:(

I agree, sounds like it's broken.

41V is a bit low voltage. To my knowledge, the FP can be set to minimum 44V and below this you will get maximum power output protection. I never tested that for a long period of time. Try to use a batterypack with higher voltage, 13-14S for lion or 16S for life.
Even if the dc-bus is disconnected ...

I have a theory to what might have caused the failure.
While doing low voltage testing, using a 6S battery to power the inverter power stage via a heater element in parallel with a 30A fuse, the motor was jerky and the fuse blow because the encoder pins needed swaping. Swaped the encoder pins and ...

Was that a fluke or an actual standby current? If so that would be worrysome.


I can't really say regarding the current. Will pay more attention to it once the inverter is replaced.


An intermittent gate drive signal could be unhealthy, perhaps... I like to check the connector pins with ...

Are there any checks that can be done to the OI logic board to rule it out as the cause, just to verify the same thing doesn't happen again?
Could it even have been the cause in this case? Seem very unlikely to me.

Diode tested it before my first post. All three low (if I remember correctly) transistors show 0,0V when doing diode test. Was 0,3V before, so indeed broken. I have not checked gate drivers for red light but I think diode test is enough.

Thank you johu for checking the parameters. Now that can be ...

I'm helping a friend getting his LDU to run.
Followed Damien:s video and everything was fine spinning the motor smooth and controlled on 22V via heater element.
Reconfigure with full pack, 72S (12 Tesla model S modules). First spin on HV battery in forward works fine (very smooth and at low speed ...

The outlander rear motor is alot smaler than the leaf and would still provide more torque than stock motor/gearbox (59*2,8). Connect it directly to transfere case an retain hi/low gear. How much room for batteries would there be left then?

Love those tiny trucks!
How about a Nissan Leaf motor connected directly to the propshaft. I belive the rear axle is approx 5:1 and the motor produces about the same torque as stock ICE in first gear. You can alwas limit max power.

In my car (Yaris OI-board) I have patched in a MCP2562 CAN-tranciever. It is powered from 5V and can have the I/O signals from 3,3V.
Screenshot_2024-11-06_04-18-10.png

I also use a separate 3,3V LDO to power the WiFi-module.

All this to avoid having spikes in the current and angle measurements ...

Quite some difference between storeCellVoltage:
My version:
void storeCellVoltage(uint8_t dataRegister, uint8_t readRegisterData[(2*numberOfSlaves + 5)])
{
for(int i=0; i<numberOfSlaves; i++)
{
uint16_t measVoltage = ((readRegisterData[(2*numberOfSlaves + 1) - i*2] << 8) + readRegisterData[(2 ...

evdc wrote: ↑Sat Oct 26, 2024 4:27 pm Hello, I was able to run the test code that you sent me and I compared the series output of the two codes and I think I understood what the main error is.

That sounds great. Please, share what the error was so I and others can learn from it.

No need to use CAN but you then need to setup the SPI-bus in another way.

The CAN init fails. The SPI-bus setup is done by CAN init, hence the MAX17841 init fails as well.
I suggest you start by looking at why the CAN-init fails.

Have you tried swapping position of the different modules? Do you still have the same effect when having module 7 as module 1 or as module 12?

Test with this SW and all modules. Do you still have the same behaviour?

When cell balancing is active you can not trust the cell voltage readings. When a cell is balanced it will have effect on adjecent cell voltage readings. To measure the cell voltages correctly, no balancing can be active while taking measurement.

An example from an old log.
Voltage reading at rest ...

Hello @bexander , I finally tried to balance the battery today with the attached code and it also has log files from the series motoring in which it can be seen that when the balance is turned on, it discharges even the most discharged cell, which should not be the case. (I use 18 modules)

Best ...

Please post the serial print-out that you get with the attached code.
You only have 3 modules connected, correct?

Set output voltage to desired end voltage, for example 54,6V (13x4,2V), and set desired max output current.

I ordered them from my local car dealership, Toyota Center Mölndal.
Took 1-2 day for them to get the parts.

Yes, will fit Leaf Gen2 80kW inverter.
Housings from Toyota.
Terminals from Mouser or AliExpress.
Seals from AliExpress.

Looking at your setup, you are using experimental board wire and they are a soure of error due to bad contact. Double check all wiring with multimeter or better solder the wires and/or use proper connectors.

In Error2.txt communication is somewhat working but maybe disturbance on the bus as it can ...

Yes, you need to have the slave connected to a battery otherwise it has no power and will not respond.
I'm a bit busy at the moment but will try to help more when I have more time on my hand.

Its' a Q211 out of a RX450h 2013 model year. I don't have any other details on the motor.

I played a little bit with the code. Maybe i wrote some data to the master, that is now stopping it from working correct? Could that be possible?


I don't think so? It should lose all it's settings when powered down, hence everything has to be set at start-up. Have you tried reverting to the ...