AI-based FPGA Accelerator for EVs Battery Management System

Abstract The swift progress of Electric Vehicles (EVs) and Hybrid-Electric Vehicles (HEVs) has driven advancements in Battery Management Systems (BMS). However, optimizing the algorithms that drive these systems remains a challenge. Recent breakthroughs in data science, particularly in deep learning networks, have introduced the Long Short-Term Memory (LSTM) network as a solution for sequence problems. While GPUs and ASICs have been used to improve performance in AI-based applications, Field Programmable Gate Arrays (FPGAs) have gained popularity due to their low power consumption and high-speed acceleration, making them ideal for AI implementation. One of the critical components of EVs and HEVs is the BMS, which performs operations to optimize the use of energy stored in lithium-ion (LiB) batteries. Due to the nonlinear electrochemical nature of these batteries, estimating States of Charge, States of Health (SOH), and Remaining Useful Life (RUL) is challenging. This paper proposes an advanced AI-based BMS that uses LSTM to accurately estimate Lithium-ion Battery states, providing crucial information for battery performance optimization. The proposed design is implemented in Python for training and validation. The hardware prototype is synthesized using Xilinx Vitis High-Level Synthesis (HLS) and implemented on Xilinx Zynq System-on-Chip (SoC) PYNQ Z2 board, achieving low RMSE values of 0.3438 and 0.3681 in training and validation, respectively.