README.md
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:

<![CDATA[]]>https://www.ennoid.me/bms/gen-1<![CDATA[]]>

Documentation:

<![CDATA[]]>https://blog.ennoid.me/<![CDATA[]]>

Block diagram



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

<![CDATA[]]>https://endless-sphere.com/forums/viewtopic.php?f=14&t=92952<![CDATA[]]>

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:

<![CDATA[]]>ENNOID-BMS Datasheet<![CDATA[]]>

Software:



ENNOID-BMS GUI configuration tool:
<![CDATA[]]>ENNOID-BMS tool<![CDATA[]]>

Firmware:

ENNOID-BMS firmware .bin file:
<![CDATA[]]>ENNOID-BMS.bin<![CDATA[]]>

View this project on CADLAB.io.