STMicroelectronics AEK-POW-BMSLV

Overview

AEK-POW-BMSLV from STMicroelectronics is an automotive-grade evaluation board for low-voltage (<60 V) battery management systems, integrating the SPC58EC80E5 MCU, L9963E cell monitor, L9963T isolated SPI transceiver, VNQ7050AJ quad high-side driver, and customized SPSB100 PMIC with CAN FD. It supports 4–14 series-connected Li-ion/LiFePO₄ cells, performs passive balancing via 100 kΩ resistors, and computes SOC/SOH using an extended Kalman filter algorithm preloaded on the MCU.

For engineers reviewing the AEK-POW-BMSLV datasheet, AEK-POW-BMSLV pinout, AEK-POW-BMSLV application, or AEK-POW-BMSLV equivalent, this board serves as a production-ready reference for motorcycle auxiliary power, e-bike BMS, and 12–48 V EV subsystems - with dual CAN ports (CAN 2.0A/B + CAN FD), isolated SPI communication, real-time cell voltage/current/temperature monitoring, and fail-safe contactor control via four high-side outputs.

Technical Context

The board implements a hierarchical BMS architecture: the L9963E acquires per-cell voltage (±10 mV accuracy), stack voltage, temperature (via 8 NTC inputs), and coulomb count; data is transmitted over ISOSPI to the SPC58EC80E5 via the L9963T, enabling noise-immune daisy-chain expansion up to 31 devices. The MCU runs preloaded SOC/SOH estimation firmware (UM3185) and coordinates passive balancing, fault logging, and safety shutdown via the FCCU.

The SPSB100 PMIC delivers three regulated rails (1V@6A, 3.3V@3A, 5V@3A), integrates a CAN FD transceiver for domain controller communication, and provides fail-safe diagnosis signals to the MCU. The VNQ7050AJ drives battery pack contactors with analog current sense and thermal protection, while external TJA1057 CAN transceivers support redundant network interfaces.

Key Specifications

Availability

AEK-POW-BMSLV is available at Aetrix Electronics and suitable for motorcycle auxiliary power systems, electric bicycle battery management, and 48 V mild-hybrid subsystems requiring stable component supply, automotive qualification, and rapid prototyping capability.

Supply support for AEK-POW-BMSLV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade solutions used in over 200 billion devices annually.

The AEK-POW-BMSLV belongs to ST's AutoDevKit ecosystem - a family of automotive evaluation platforms built to accelerate development of ASIL-compliant battery, motor, and powertrain control systems using ST's AEC-Q100 qualified components.

FAQ

Is the AEK-POW-BMSLV compatible with high-voltage battery packs?

No - it is specifically designed for low-voltage applications below 60 V. Its L9963E monitor, SPSB100 PMIC, and VNQ7050AJ driver are rated for ≤60 V operation. High-voltage variants (e.g., AEK-POW-BMSHV) use different isolation, sensing, and driver architectures and are not interchangeable.

Does the board include preloaded firmware for SOC/SOH calculation?

Yes - the SPC58EC80E5 MCU ships with factory-preloaded firmware implementing an extended Kalman filter (EKF) algorithm for SOC estimation and SOH tracking, documented in UM3185. Real-time results (cell voltages, temperatures, current, SOC) stream via UART at 115.2 kbps to a PC terminal.

Can the passive balancing be disabled or reconfigured?

Yes - balancing is software-controlled and fully configurable via the MCU firmware. Users can enable/disable per-cell balancing, set voltage thresholds, define balancing duration, and adjust cycle intervals through register writes to the L9963E - no hardware modification required.

What certifications does the AEK-POW-BMSLV hold?

The board incorporates AEC-Q100 qualified components (L9963E, L9963T, SPC58EC80E5, VNQ7050AJ) and complies with ISO 11898-2 (CAN physical layer) and IEC 61000-4-2/4-4/4-5 (ESD, EFT, surge immunity). It is intended for development use and requires system-level validation for end-product certification.