Battery management system

[lachavusache]

Hi, I am looking to use AEK-POW-BMSWTX battery management system for EV related battery management experiments. Please let me know if I can use AEK-POW-BMSWTX with STM32 microcontroller boards. Also please let me know if any other boards are required to perform experiments with AEK-POW-BMSWTX.

Thanks and regards

[Max VIZZINI · Accepted solution]

Hi,

Yes, you can use AEK-POW-BMSWTX with STM32 microcontroller board, but you have to port the code from SPC58EC or write it by yourself.

The AEK-POW-BMSWTX supports 14 series batteries, if you need to add more, then you need to connect in daisy-chain other nodes like AEK-POW-BMS63EN. Each node will have max 14 cells in series, and you can have up to 31 nodes.

The code is available and configurable in AutoDevKit only for SPC58 microcontrollers (e.g. AEK-MCU-C4MLIT1).

Best Regards,

AutoDevKit Team

[lachavusache]

Hi, from the documentation and autodevkit demo pdf it is not clear whether I can perform experiment using only STM32 and AEK-POW-BMSWTX. Can you clarify if I need any other boards (AEK-POWBMS63EN, AEK-COMISOSPI1, AEK-POW-BMSHOLD) apart from these two to perform battery management related experiments?

[Max VIZZINI]

Hi,

Yes, you can use STM32 and AEK-POW-BMSWTX without any extra board. The only additional thing you need is the 14 cells to connect to AEK-POW-BMSWTX. Here you have the option to use or not to use our battery holder AEK-POW-BMSHOLD.

 Best Regards,

AutoDevKit Team

[lachavusache]

Thank you for the information. Is there a reference manual for the AEK-POW-BMSWTX, the document (DB5197 - Rev 2) given in the website has minimal technical information? Please let me know how to access the reference manual for the board.

Thanks and regards

[Max VIZZINI]

Here you go:

https://www.st.com/resource/en/user_manual/um3185-getting-started-with-autodevkit-battery-management-system-bms-evaluation-boards-stmicroelectronics.pdf

[Alioune]

Hi Max,

I'm using the AEK POW BMS WTX to read the cell voltages.

I'm powering the component with a voltage divider, so C14 is higher than 9.6V.
My problem is that I can't assign a new ID to the L9963E chip. I'm coding in STM32 Cube IDE, not just AutoDevKit.

I look forward to your reply. Thank you for your understanding.

[SRomeo]

Hi @Alioune,

Thank you for reaching out. However, your issue is not entirely clear. Please open a new thread with a clear and specific title.

Be sure to provide detailed information about your problem so we can offer the best possible support.
(Including pictures and schematics can also help clarify the problem)

Creating a dedicated thread helps others in the community find relevant solutions more quickly.

Thank you for your understanding.

Best regards,
Simone
AEK Team

[Alioune]

[Alioune]

Hi @SRomeo ,
As you can see in the photos, I am using a voltage divider (resistors in series) to power the AEK-POW-BMSWTX. However, when I attempt to read the cell voltages via SPI using my STM32F439ZI, the readings remain at zero. This is because the L9963E node ID assignment is being rejected every time

Thank you for understanding.

Best regards !