tom-evnut / teslabmsv2 Goto Github PK

Hello,

I wanted to compile the programm. The compiler says:
Serial_CAN_Module_Teensy.h: No such file or directory

Where can I find the library. Or do I have another problem? How can I solve this problem?
Thanks in advance

defuse53

Hi all.
I have a setup of 16 tesla modules with SimpBms but it does not indicate when is balancing on the Nextion display, it is always showing 0, on the display, if someone could help me on that I would be grateful.
thanks

I have been using the SIMP BMS with Victron CX for a number of months with the SIMP connect to the 'VE - CAN' port and a Victron terminator in the second port on the CX. Running at 500kbps with the CX set to CAN-BUS BMS on the VE CAN port. Its been working with no real issues.

I purchased and additional Victron Solar charger with VE CAN connectivity , after a bit of trial and error I set the VE-CAN port on the CX to VE-CAN & CANBUS 250kbps. I also set the speed on the Simp to match at 250kbps. This seemed to work OK and I could see both the Solar charger and SIMP on the Victron CX. An hour later the SIMP BMS goes offline and investigating it seem to have burnt out 'C13' please see attached picture. As this had been running fine for a number of month prior to the change I can only assume I have run into hardware/configuration compatibility. Hence I'm


reaching out to you for some assistance.

Thanks

Hi Tom,
t0.txt -> +- not shown

you forgot

Serial2.write(0x22);
Serial2.write(0xff);
Serial2.write(0xff);
Serial2.write(0xff);

after

Serial2.write(0x22);
if (bms.getAvgTemperature() > 0)
{
Serial2.print("+");
}
else
{
Serial2.print("-");
}

If i set a value for "h" -> "j" will be reset to "0"

h - Discharge Current Taper Offset: 300mV
j - Discharge Current Temperature Derate : 40.00C

h 200

after that:

h - Discharge Current Taper Offset: 200mV
j - Discharge Current Temperature Derate : 0.00C

Hello,

in my opinion PreCharge should be switched off after main contactors are activated.

• saves energy and wear
• prevents possible damages if main contactor fails

Thomas

Hi Tom,

I am building a TeslaBMS for a boat conversion project and based a lot of my initial work from the hackaday thread that directed me to your github.

After essentially rewriting all your code in python and using it with an rpi with a sci module to talk to the modules so far, I am now considering moving towards using an arduino module (likely a teensy 3.1) to avoid having too much current draw and to mimmic your setup.

The teensy 3.1 only outputs 3.3v on its sci UART. Are you using some level shifting circuit for it to work?

Do you plan on adding a UI to monitor the balancing in production?

Thanks

Hi, Im running an variation of your code and sometimes I get missing module reads which disconnects main contactor due to Series cell fault. Some other times, at power up, I get a series Cell fault. When I check in the debug window, it says a cell number lower than the saved pack configuration (missing reads). It comes back online after "cells present reset".

Have you seen something similar in the past?

The stat.txt field in nextion displays never geht to "ready" in ESS Mode.

Value is stuck in "boot".

Setting "Discharge Current Taper" sets "SOC Setpoint 1" to zero -> see attached picture.

Hello,

I cannot find the wiring diagram. Can you please help me?

Thanks in advance
defuse53

h - Discharge Current Taper Offset: 300mV

-> is not explained in manual V0.14

Firmware Version : 190729

Pressing "R" to restart the BMS is not working. The serial connection is reseted but the device is not coming back to life.

See the screenshot there, Cells 20 and 21 keep bouncing back and forth between unusually high and low values. Unsure of the cause. Not documentation found to support this behavior.

Tom, any consideration for an export/import of the configuration. Recent issue wrote a new value to the (I)nore option which disabled my temp readings.

Being able to export existing configuration, zero all variables, and then import after an upgrade would reduce weirdness. Otherwise it’s manually record all settings, upgrade, and manually check all settings.

When updating the hex file, getting error TeslaBMSV2.ino.TEENSY31.hex (unreadable)
Verbose information states "ihex: parse error line 1"
Teensy Loader 1.48
TeslaBMSV2.ino.TEENSY31.hex uploaded 7 days ago

I have put together a new battery rack for my motorhome using pre-charge, positive and negative contactors which doesn't seem to be supported by ESS mode.

How about a mode where you activate the charger input, but not the run key; where it does the standard startup process of the Negative contactor, pre-charge and then positive contactor plus equalization?

Thanks

Thanks for making and sharing this great open-source BMS. I'd love to build a second life EV bat pack with a Sunny Island as basic off-grid solution. So far I could only find batrium and rec bms with support for the SI. In the .ino it says device "Victron/SMA" but I'm not sure whether that means that the SMA Sunny Island is supported or not. There are a lot of them out there, I'm sure there is more "demand" for a FOSS BMS solution working with them as it would be a very neat solution for Model S packs as seen here:

I am looking at adding more modules to my solar system and discovered today that the newer battery modules for the model S/W are daisy chained with a ribbon cable.

Is SimpBMS compatible with these OEM controllers?

Any idea on how to wire these modules up?

Thanks

Linux is case sensitive. compiling TeslaBMS in arduino studio fails because of #include "config.h"

since windows is not case sensitive, it would be a nice gesture to linux users to rename CONFIG.H to config.h.

Serial2.print("firm.val=");
Serial2.print(firmver);
Serial2.write(0xff); // We always have to send this three lines after each command sent to the nextion display.
Serial2.write(0xff);
Serial2.write(0xff);
Serial2.print("firm.val=");
Serial2.print(firmver);
Serial2.write(0xff); // We always have to send this three lines after each command sent to the nextion display.
Serial2.write(0xff);

Double serial output of the firmware version to Nextion Display.

It would be quite nice to have a page with the actual cell voltages ....

Maybe i can contribute that to your project ?

Jens

Hi @Tom-evnut - sorry to post this as an issue but I'm not sure where else to ask the question. I'm working on a system to read the BMS from the Tesla modules and was hoping to use the over / under voltage detection on the Tesla BMS as a backup (i.e. if my BMS failed, then this would trigger and potentially open a contactor).

I've managed to get the fault status working in terms of there being faults in the appropriate registers, however that line (on pins 6 and 10) never seems to go high. I've pulled it up with a 4.7k resistor, and when the BMS board is powered off it's high, but when the power's on it gets pulled low and kept there regardless of any fault conditions.

Did you ever see this line go high?

I would like to monitor BMS data with external tools.

Given I can connect to the serial port and monitor the diagnostic data, looking for patterns.

When I see "BMS Status " I know it's the beginning of a staus update, but I have no good end characters.

My requests:
1.) Add a unique character string at the end of the status update so that I can programmatically know the end of the datagram.
2.) Fix the order of the last line. Currently, all values have a label and value (e.g. Cell1: 3.80V or Avg Temp: 17.818C) but the last line looks like this: CANbus 0.00mA 71% SOC 988320.00mAh
Please set each to a label, value pattern ( e.g. CANbus 0.00mA SOC 71% ChargeCapacity 988320.00mAh)

Thank you!
David

Hello! I saw on a previous issue that it was asked if the Sunny Island units were supported and I see someone using it with a 6.0H. I was wondering if this support also covers the 6048 model?

Thank you.

Hi,

I flashed the latest version onto the BMS this morning . The cell voltages update but the SOC holds steady at whatever value it calculated when booted. regardless of any charge/discharge. Resetting the BMS and the SOC is correctly calculated during boot but then fails to refresh going forward. This value is also reflected on by Victron CX too, hence the frozen value is passed accross the CAN. The total pack voltage ( in my case something around 48v ) is correctly displayed and also updated depending on charge level.

I have 2 Tesla Packs in Series. ( 48v) configuration

thanks

Hi tomdebree,

I have downloaded all of the files provided here. However, when I try to compile/verify it in Arduino Studio I get errors for missing header files such as ADC.h and FlexCAN.h
Is there somewhere else that I need to pull these files from?

Thank you. Kind Regards,
Bailey

Hey,

We found out that connecting to the serial console on debian using screen or minicom has issues.
Connecting on the same laptop thru the arduino IDE serial monitor works fine.
The issues are that we were unable to change some settings.

A guess is that it has something to do with windows/unix newline, which arduino IDE probably handles better?

Cheers,
Tom