STMicroelectronics AEK-POW-BMSLV Battery Management System Board

STMicroelectronics AEK-POW-BMSLV Battery Management System Evaluation Board utilizes automotive-grade components to connect to a battery pack and monitor each battery's state of charge (SOC) and state of health (SOH). The AEK-POW-BMSLV manages battery balancing by passive discharge, implementing the software already preloaded on the onboard SPC58EC80E5 microcontroller.

The STMicro AEK-POW-BMSLV has been specifically designed to manage the battery management system for low-voltage applications whose voltage range is below 60V, such as motorcycle auxiliary power and electric bikes. The versatile CAN2.0A/B protocol enables integration into several systems and efficient component communication.

The AEK-POW-BMSLV has two CAN ports for flexible networked connections, while four high-side channel outputs optimize power distribution. The BMS accommodates various battery configurations, supporting 4 to 14-series connected cells.

Features

Low-voltage (<60V) single board for a complete battery management system (BMS)
Hosts:
- L9963E AEC-Q100 qualified automotive multicell battery monitoring and balancing IC
- L9963T AEC-Q100 qualified automotive general-purpose SPI to isolated SPI bidirectional transceiver
SPC58EC80E5 microcontroller automotive grade to perform charge balancing and to compute the state of charge (SOC) and the state of health (SOH)
VNQ7050AJ quad channel high-side driver for battery pack contactor driving
SPSB100 (custom version with CAN port) fully integrated power management system IC of which the following features have been implemented on the board - CAN FD transceiver for external communication
Additional external CAN transceiver

SPI for external communication
Configurable window watchdog
System wake-up feature and ignition wake-up
Fault collection control unit (FCCU) used to collect eventual issues raised by the micro and according to an implemented logic perform some actions like system shutdown
Fail-safe diagnosis from SPSB100 to microcontroller
Voltage and current monitoring of every single cell and of the entire battery node
8 GPIOs to connect temperature sensors as NTCs, of which four GPIOs wired to the microcontroller while the other four to the L9963E
Passive balancing is executed through 100kΩ external resistors
Dimensions of 145mm x 65mm
Included in the AutoDevKit ecosystem