martii wrote: ↑Mon Dec 16, 2024 2:05 pm Is this battery from heavily crashed car? Sometimes BMS is locked if few airbags are deployed during accident

Yes this one was.

I also find that SOC can be read out in reg 0x358 0 byte.
case 0x358:
battery_soc = rx_frame.data.u8[0];

0-100 in decimals. No need for scaling.
But I found out that SOC is "frozen" will not move even if the battery is cycled up and down, which confirms my suspicion that some kind of activation ...

case 0x125:
battery_voltage = (rx_frame.data.u8[3] << 8) | rx_frame.data.u8[4];
battery_current = (rx_frame.data.u8[5] - 0x58) << 8 | rx_frame.data.u8[2];
break;

datalayer.battery.status.voltage_dV = ((float)battery_voltage / 128) * 10;

datalayer.battery.status.current_dA = ((float)battery ...

Gave up on deciphering the CANbus to get the relays working, reverse engineered the Relay Control Board instead, made a prototype to control them via the LilyGo board. the voltages, temperatures, and the SOC, LOAD can be read out via CANbus and the ESP32 can act as the brains controlling the relays ...

You need to make sure or HVIL and other hardware related signals are satisfied - would be good to check those on the car.


I think I did HVIL, just a jumper resistor of a few oms on all of the HV connectors HVIL and the HVIL in and out pin of the plug. I dont have a car, so its only guessing on ...

Having a whole pack you can easily try to replay canbus from ignition on dump provided by opelmantra - working out later what commands are critical for this.


Did that on my Peugeot e-partner HV battery can bus, no reaction, it looks like all the CAN bus ids that the battery sends are the same ...

All pictures are available at the google drive resources provided by opelmantra.


Got digging around myself for and found that indeed the pinout was right.
https://drive.google.com/file/d/1VE8KQg7MolkVpeZsysdt9z2gXNMVAycQ/view?usp=sharing

Can also report probably that pin-11 is HVIL out ...

Hi, Would you mind putting up a picture for the pinout of the BMC connections (12v, HVIL, CAN, ect.)? I just got a Peugeot e-partner battery and the BMC looks identical with the same layout and connectors, I am just now starting to figure the pinout so I can start sniffing the CAN connection. Would ...