ennoid-bms's Introduction

ENNOID - BMS

ENNOID-BMS is an open-source configurable battery management system consisting of a Master board based on an STM32 microcontroller connected through an ISOSPI interface to several modular slave boards. ENNOID-BMS can monitor the specifics temperatures, currents & voltages that are critical for any lithium-ion battery packs. Based on the monitored inputs & the configured parameters, the master board can allow or interrupt the flow of energy from the battery pack by switching the state of external heavy-duty contactors. ENNOID-BMS can measure each cell voltage level & can trigger the passive balancing function during charging for cells above the configured limit to ensure that all cells have a similar State-Of-Charge (SOC). Parameters can be configured through the ENNOID-BMS-Tool software running on a USB connected host computer.

Ordering:

For ordering assembled BMS or battery packs, please visit:

https://www.ennoid.me/bms/gen-1

Documentation:

https://blog.ennoid.me/

Block diagram

The evolution of the BMS can be followed on this thread:

https://endless-sphere.com/forums/viewtopic.php?f=14&t=92952

Features:

Modular with master/slave topology
12S, 15S & 18S slaves board options
Master board options: High Voltage (Master-HV) & Low voltage (Master-LV)
Up to 500A continuous operation
Integrated bi-directional current sensor
12V drive coil outputs for charge, discharge & auxiliary circuits
Communication between slaves & master through a two-wire daisy chained ISOSPI interface
Isolated CAN bus interface
Isolated charger detection circuit
Voltage measurement for battery pack & load
Build-in precharge circuits
USB interface for programming and firmware upgrades through an easy to use graphical user interface
OLED Display, serial output & power button
0V to 5V cell voltage operation

Documentation:

ENNOID-BMS Datasheet

Software:

ENNOID-BMS GUI configuration tool: ENNOID-BMS tool

Firmware:

ENNOID-BMS firmware .bin file: ENNOID-BMS.bin

View this project on CADLAB.io.

ennoid-bms's Issues

How do I get the latest PCB and schematics?

Hello friend; Thank you for sharing the project;
How do I get the latest PCB and schematics?

Layout files are missing

Hello, thanks for this open source project. Would you be providing the .kicad_pcb files for the layout as they are missing you?

Regards, Prithvi

MCU code/SPI driver

Hi,

I want to make some changes at the SPI communication, please could you give me the MCU software project, or at least the library used to drive the LTC6820 with daisy chained LTC6813's

Thank you so much
Best regards

Code compiling

Hi!
I want to compile and build the code. Hence, may I know the procedure for the same?

Thank you
Jahnavi

One of the battery is not detected.

I have made one 6s1p pack to perform test on ENNOID BMS using Master-05/2019 and slave LT6811-05/2018. The issue I'm facing from last one month is whenever i connect 6s or 7s or any configuration Software shows -1 cell in its Real time data window. I tried to debug hardware i didn't find any issues as of now.

Firmware update problem

Hello,
I already post this message to
https://endless-sphere.com/forums/viewtopic.php?f=14&t=92952&start=350
but did not receive the answer.

I compiled and uploaded BMS FW to NUCLEO-F303RE for testing.
Seems that everything fine, but after updating FW version does not changing.
While sniffing serial communication I do see the upgrade process as transfering FW data packets, but obviously it does not finished successfuly.
Could you, please, explain what happened?

Support for: Bluetooth or WiFi

Nice product your have here.
Question: do you have in plan (roadmap) to add support for Bluetooth or WiFi?

With a Bluetooth/WiFi support I can build a mobile app (iOS / Android) and support this project.
From my research the Bluetooth/WiFi it can be integrated with the CAN interface, is this possible with your product?