Bump & pricedrop to 200 euro + shipping

Bought it for my conversion, but after I changed plan to another batterypack I could not fit it anymore.
Designed a simple interfacePCB to let it communicate with my own VCU, but never tried to get it to work. So this interfacePCB has never been tested, but it should be a good starting point ...

From what car is this nice tiny square coolant reservoir ?

If I remember correctly, the I3 has a single-phase OBC integrated in the drive unit. If the car was ordered with a 3-phase OBC, a separate KLE was added for the two other phases. Since your message tells "internal" charging electronics, I guess there is something wrong with the OBC in the EME. Maybe ...

Thanks for the tips !

Just tried:
CAN-backend version
Initially stalled at the " (SD_MMC.begin())" instruction. After removing the SD initialisation, project runs & webserver is functional !

uart-backend version (which I need)
Does hang after the "entry 0x400805f0". Debug-message at the very ...

Did anyone else get the current version https://github.com/jsphuebner/esp32-web-interface running on an ESP32 (WROOM32 / Espressif) ? Tried two more random applications and they all download & run, just this one does not boot after download.

Earlier I did the programming with Arduino IDE 1.x. (FS / sketch). Just installed the python / platformio environment and got the "pio run --target upload" and "pio run --target uploadfs" to work. Both successfully download serial to the ESP32 (after editing the platformio-local-override.ini) but ...

Hi !
I have been trying for several hours to get a new ESP32 WROOM32 operational with the web interface, but cannot get it to work.
ESP32 Sketch data download OK (see screenshot)
ESP32 Sketch downloads OK. (see screenshot)

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Are available from BMW as a spare part, price is quite reasonable.

Are you just sending the 0x1C, or together with the other commands for reading the cell voltages/temperatures ?

- 0x16h (1byte, 100ms rate) requests specific slaves to report cell voltages (1Ah with incomplete pack, 1Bh when 10 modules connected)
- 0X17h (1byte, 100ms rate) requests all slaves to ...

Checked my notes again; it really should be the 0x01C telegram,3 bytes long, 100ms rate.
- First byte: Module to balance (19,1A, 1B, 1C, 1D etc.) My note also says that 'FF' triggers all the modules to react. Original BMS-master cycles every 100ms to the next module, so the a triggered balancing ...

Nice work !

....One major problem I experienced was that tapping the pressure relief port, and drilling the new outlet created significant burring inside the shaft. I had to very carefully file these to allow the piston to move freely....

If you enlarge the hole with a small (3mm) carbide mill, use a spiral ...

johu wrote: ↑Sun Mar 20, 2022 11:53 am

FJ3422 wrote: ↑Thu Apr 01, 2021 11:21 am Sure, or course. Will check one of these days if the V7 is released yet, else just start from the V6.

Any update on that side?

No sorry, because of a lack of time I ordered a V7 from you a couple of months ago.

Watch out a bit with the modern cell chemistries. I don't know if these are already NCM811, but thermal stability of low-cobalt cells is way less then your current rock-solid LGX-P1/P1.5 NCM111/NCM333 cells. The core-cell-temperature at which decomposition starts is way lower on the low-cobalt ...

Did you found out how the ballancing works?
If so can you tell me how it works.

Yes, I got it working but unfortunately didn't fully document it. If I remember correctly; module addressing for balancing is in the sample code (shared earlier in this topic), arangement of cell-bits still has to ...

The V60 has 10S modules and uses can communication
The V90 has 16S modules and uses "proprietary daisy chain interface" (catphish github).


Correct ! Completely different design. V60 BMS has full insulation between LV / HV sides and onboard dc-dc converters for supplying the BMS-chip. So no ...

If you are looking for these EQA 16S modules, I currently have 6 for sale due to some change of plans. You can contact me by PM.
They have nicely integrated watercooling. Celltap-connectors included, no BMS.

This is de rear of the connector in de newer KLE's

Have both here and just had a look; notch is unfortunately not at the right position. Also take into account that this chassis plug-in connections at the rear. Chassis of a KLE has M5 screws if I remember correctly.

Is this the connector at the i3 charging port cables ?

Isn't it available at BMW as a sparepart ? I know the HV-chassis connector of the batterybox (330e, 530e, i3) is listed. Might be the same (watch out with the coding notches).

...Open to feedback if my PWM voltage to the LIM is a stupid idea as well....


Will that work ? If I understand correctly, the LIM uses the voltage measurement to verify the pre-charge voltage on the chargerside of the contactors to prevent contactor damage. So that is with the contactors opened ...

ggeter wrote: ↑Thu Dec 02, 2021 8:54 pm Do we need to pre-charge this unit? Or can I just put a 400v/80a relay on the main supply and just flip it when I turn on everything else?

Did not check that (yet). But it's easy to check; look at the PCB and see if there is a current-limiting device between the HV-connector and the HV-capacitors.

Received mine yesterday and immediately tried some things;
- 0x398 byte0 goes 00->01 as soon as 0x285h is received.
- 0x398 byte4 seems to be inlet temperature
- 0x398 byte5 seems to be outlet temperature
- 0x398 byte7 h70 when HV is <175Vdc, h00 when HV >175Vdc. So 175V seems to be the low-voltage ...