Battery Management System
ENNOID-BMS
Our configurable battery management system is engineered to offer a complete solution for monitoring high voltage battery packs. It consist of a Master board based on an STM32 microcontroller connected through an ISOSPI interface to one or several slave boards. The modular BMS can be configured for various applications at any voltage & at any power level.
Thanks to the Open-Source nature of ENNOID-BMS, customers can contribute to the project and adapt it to their needs. Hardware and software repositories are available on our Github page. Information can also be found on our blog.
Slave board features:
Scalable & isolated 1000VDC+
Compatible with our Master-LV & Master-HV boards
From 5 to 18 cell levels monitoring per board
Daisychain Master/Slave ISOSPI communication
Up to 9 temperature sensors per slave
33 ohm balance resistors (0.125A capacity) on all channels
1.2mV accuracy, -40 to 120C operation
Extra low power consumption (Sleep mode = 6uA)
SMD fusing on all cell monitoring channel
Molex SL horizontal connectors for balance & temperature. (Comes with male, female + crimps)
Molex SL vertical connector for ISOSPI
Compliant with formula SAE requirements
Variant:
LTC6811 : Up to 12 cells voltage monitoring & 5 temperature sensors per slave
LTC6813 : Up to 18 cells voltage monitoring & 9 temperature sensors per slave
Slave board LTC6813-18S
Software download: ENNOID-BMS configuration tool
**Manufacturing lead time : 2 weeks
***Not included with master & slave boards: Main contactors, cabling, OLED display, Power button, cable lugs, power supply, charger. Check accessories offering
Master-HV board
Master-HV board features:
2022/09 updated design: Master-HV now comes with humidity sensor, isolated onboard 5V power supply for isolated CAN bus interface & USB C
100V to 400V operation (Not tested above 400V, but designed to monitor up to 1000VDC )
Isolated voltages measurements for load & battery pack
Isolated bi-directional current monitoring (up to 2500A pulsed, 500A continuous)
Isolated charger detection circuit
Isolated CAN bus interface with CAN wake-up signal
Daisychain Master/Slave ISOSPI communication
Dual PCB pattern for bolt-on EVC500/EV200 contactors
12V contactor coil outputs for charger & external temperature control circuits
Integrated predischarge circuit
USB & serial interface for configuring and firmware upgrades with the ENNOID-BMS-Tool or VESC-Tool
OLED display output (I2C display)
ON/OFF toggle/momentary switch input
Buzzer
Formula SAE: 72 additional temperature monitoring channel is possible with our isolated I2C expansion boards connected on the OLED display I2C port. Up to 9 expansion boards having 8 channels each is possible.
NEW FEATURES 2022:
Elcon/TC charger support over CAN bus (CAN1430)
VESC & VESC-tool CAN & USB compatibility for firmware updates, data monitoring & parameters configuration
Master-LV board features:
2021/06 updated design: Master-LV now comes with charger voltage measurement, humidity sensor, isolated onboard 5V power supply for isolated CAN bus interface & USB C
30V to 150V operation
Voltages measurements for load, charger & battery pack
Bi-directional current monitoring (up to 2500A pulsed, 500A continuous)
Isolated charger detection circuit
Isolated CAN bus interface with CAN wake-up signal
Daisychain Master/Slave ISOSPI communication
Single PCB pattern for bolt-on EVC500/EV200 contactor
12V contactor coil outputs for charger & external temperature control circuits
Integrated predischarge circuit
USB & serial interface for configuring and firmware upgrades with the ENNOID-BMS-Tool or VESC-Tool
OLED display output
ON/OFF toggle switch input
Buzzer
NEW FEATURES 2022:
Elcon/TC charger support over CAN bus (CAN1430)
VESC & VESC-tool CAN & USB compatibility for firmware updates, data monitoring & parameters configuration
Master-LV board
Boards dimensions