Dodgy connection or bad 5V reg? Thou shall measure voltages. do 12V arrive at the regulator and do 5V come out? Do 3v3 come from the 1117 3v3 reg?

Hopefully someone out there can help me out with details on how to use these BMS? I'm not sure whether these have been reverse engineered. I'm assuming they are "dumb" modules that report to some main module and executes its balancing commands. You can find code for calculating various hi...

Finally got around to re-assigning the connector pins and made the flash SPI easier to access. Moved some components around to reflect the new placement also. I'm calling it 4.5b as it is electrically identical to 4.5. Didn't want to burn up another version resistor. Does that make sense? grafik.png...

johu wrote: ↑Wed May 15, 2024 8:03 pm Please extend like there's no tomorrow

Anyone? Bueller?
Take the BOM of Zombieverter for example and add its connectors.

I should repeat this here: EVERYONE whos got a forum login can use it for the wiki as well. You don't need special permissions

lalithroshan wrote: ↑Thu May 23, 2024 2:39 pm I'll give a few details below and please let me know if you need anything else apart from this

Hi, is this open source?

Great, congratulations
Is there any kind of inspection or just paperwork?

Good job

One things I noticed, the vacuum pump comes on often and could use some turn-off hysteresis. How is it controlled?

Yes, its a remix of Toms code and tailored for 8 modules:

https://github.com/jsphuebner/stm32-car ... mebbms.cpp

Should be sufficient for grasping the principle and proven to work

Welcome

An arduino can hack it. You'd not use 0-5V but rather PWM as that is more common.

When creating new threads use a descriptive title. I've changed it for you

But with one motor per wheel

Great

You could move the "negative" contactor between 48 and 49 and move positive and precharge to the end of the pack. Don't break between 41 and 42, by Murphys law this can and will go wrong

Following up on a kind nudge by no one else but The Greg I created a wiki page where we can collect various part numbers for connectors, even if this creates redundancies to the existing detailed board pages.

https://openinverter.org/wiki/Connector_Part_Numbers

Please extend like there's no tomorrow

Did some tests with different wheels:


On other news I've replaced the rear springs and front shocks and springs as well as the crusty hatch

Interesting, thanks

Actually this post comes a little late as the event is already over ;) On last years e-cannonball we won tickets to Formula E in Berlin. https://youtu.be/Uo5HlnGj0Hk https://www.youtube.com/watch?v=EKYxVAolPww I was super amazed when I learned that they complete 41 laps at full race speed with just ...

I have clarified this sentence in the wiki. Putting two contactors in series doesn't double their current capability and I'm sure it's not what arber meant to say. They need to be paralleled for double current capability

https://openinverter.org/wiki/Panasonic ... _Contactor

Decided to put these back up for sale as the second A2 project has question marks on it

Leave out all the contactor stuff for now and connect the battery directly to have less room for errors.
FOC itself doesn't care about the voltage but udcsw and udcmin should be set to 0 for the first tests

Nice, so will this work with all chargers out there, even old ones?

Yes, that would require much more RAM text data bss dec hex filename 683952 2112 154504 840568 cd378 stm32_ccs Solution would be either try to butcher some redundant stuff or bigger MCU like https://www.digikey.de/de/products/detail/stmicroelectronics/STM32U575RIT6Q/18085716 or https://jlcpcb.com/pa...

For Precharge TargetVoltage isn't used but BatteryVoltage. Is that mapped correctly?

Hmm, the bit order shouldn't be changed at all, just the byte order: word = (bptr[0] << 24) | (bptr[1] << 16) | (bptr[2] << 8) | bptr[3]; I think it should be consistent with SavvyCAN that the position now specifies the "end" of the data item. So little endian bit 0, length 16 becomes big ...

Forgot the obvious: when the inverter is in Run mode it won't save (because it interrupts the control loop). It must be in stop mode. The CAN Ui doesn't report this yet...

Hmm, not sure. It's the Nissan cable 296B1-3NF1A

I assume 35mm² or 50mm². I can only measure cable diameter. Used to charge at 180A on Aral Pulse