I decided not to worry about the flywheel for now. I've rigged up my encoder to the motor using 3D printed brackets and pulleys. I've also now got the remaining connectors needed to hook up the Prius inverter control board, so hopefully I can get it up and running soon. I'm rather unsure how to use...

I'm still very happy with my TEC heater/cooler after many years.
Using tesla model S batteries and original cooling loop.

https://openinverter.org/forum/viewtopic.php?t=221

Have been following this project. Looks great, can't wait to see the final result.

Didn't see all of this video, but I was immediately thinking that this was a mockup.
Maybe he is going to the "Burning man (car) festival"

Thank you for sharing, have been looking for something like this. I alredy have a Teensy as my main ECU/display.
Simple is good

alexbeatle wrote: ↑Tue Jun 28, 2022 7:15 am
So in the 75kWh pack =>
14modules * 25.2Vmax per module = 352.8Vmax per pack
Imax = 352.8V / 23ohm = 15.34A
So the the pre-charge contactor would just need to handle 15.3A peak. Correct?

Yes, looks sane to me. If the capasitors is seen as full short?

There's a few different ways to do it! The simplest, I think, is to route L1 to all 3 modules by default (for single phase operation) - that can be done with a single DPDT relay. Then the charger works in single phase mode as normal, so CP current limit divided by 3 to each module. This relay can b...

I hav struggled with the same noise problems, with isolating comm just with capasitors. It is not a good solution in noisy enviroment! It's to high impedanse, and that is bad in noisy enviroment. You want low impedance opto coupler, or a digital isolator. This is used on the tesla battery boardit is...

I would not trust it, trow it away! A contactor should always show 0 ohm, if it's closing properly, with right voltage and working economizer. You say you could use the economizer on the other contactor, then you could try to bypass the economizer and connect 12V directly on the Kilovac coil? Just f...

E46Driver wrote: ↑Mon Jun 13, 2022 2:17 pm But doesn't STM have internal pulldown 30K already?

Yes, don't know if that is enabled, but this is a mystery?

E46Driver wrote: ↑Mon Jun 13, 2022 3:11 am Hey joromy, thats interesting. I tried both a 10K pulldown and pullup - but neither worked for me. However, I did that AFTER the ULN chip.

You must put pulldown on the STM chip!!
And it's not pin13 is pin2.

Can someone scope the chain? STM32 pin, uln pin, I'm out of lab for a while I got the same problem with high impedance load. Could be "crosstalk" but not sure? A 10k pulldown worked for me. Also very important to have 12V all time on COM of the ULN chip!!! Measurements: OUT_DCSW PC13 comi...

I got the same problem with high impedance load.
I don't think this can be version related.

Moved to more appropriate place: https://openinverter.org/forum/viewtopi ... 309#p41309

Long shoot, do you still have them?

Wow, great project.
I guess you are swapping motor and inverter with openinverter and leaf motor

Is this a feature that could be useful for you?

Bi-directional throttle.
viewtopic.php?f=7&t=2076

It's a specialized BMS chip.
https://www.st.com/en/automotive-analog ... 9963e.html

This board extend with 14 more cell.
https://www.st.com/en/evaluation-tools/ ... e-nds.html

Got this evaluation board in the mail today.
BMS for 14 cells, can add slave boards with 14 cells.
Comes with preloaded firmware.
Christmas is saved

https://www.st.com/en/evaluation-tools/ ... l#overview

I think balancing before 3.95V is a waste of energy. I also think cells should never be discharged lower than 3.0V per cell. But what if I always charge to 80%, when should I then balance? (I usually charge to 4.00V, and they rest at about 3.95V) So what you actually mean is I should charge to high...

I think the quote from "Jack Bauer" is for the AC side

I start top balancing 3.8V, but it depends on the quality of cells, the size of bleed resistors.. You should also consider if you want to charge them to 100% all the time, if you charge to 80-90%, you may have to start balancing at lower voltage. If your batteries need much balancing, then they need...

Found this article about AC batteries, have seen something similar before. But this is new. Is this the end for HV inverter and charger? https://www.tu.no/artikler/vil-revolusjonere-batteriteknologien/515416?key=rbasNgz1&fbclid=IwAR2fn9rp2OQoozguHN4wM4gZRatIz7QCVcSOwLW3sXsGtUJlf-fu-Wvvg4M It's i...

janosch wrote: ↑Mon Nov 29, 2021 4:45 pm Wow this is great! Do you have a link to the video? Who is the guy in the picture?

Not sure i snipped it a while ago. But if I'm not wrong it was "Rich Rebuilds" on YouTube

janosch wrote: ↑Mon Nov 29, 2021 1:54 pm We considered drilling and tapping an extra bleed screw into our Gen2 charger because of our positioning (sideways & upright & high in the cooling circuit).

Not so easy to see the waterflow.
I found this

Is that the original Ford/Toyota (Panasonic) NiMh batteries?
If not you will have trouble with the dimensions, pole fitting and placement.