Enabling Robust Wireless Communication for BMS on Electric Vehicles

Abstract

Battery Management System (BMS) is a critical part of Electric Vehicles (EVs). The introduction of a wireless communication and networking inside the BMS in order to replace the traditional wired bus brings multiple benefits. As it is a critical application, the network has stringent requirements such as high reliability, low energy consumption, and bounded latency. In this paper, we propose a network architecture based on an enhanced version of the IEEE Std 802.15.4 Time Slotted Channel Hopping (TSCH) Medium Access Control (MAC) mode running over the physical layer of Bluetooth Low Energy (BLE). To orchestrate the data transmissions, we present a reliable and predictable schedule based on the Low Latency Deterministic Network (LLDN) Group Acknowledgement (GACK) method which dynamically manages the retransmissions. We implement a WBMS for the Renault Zoe battery pack to demonstrate that our proposed architecture achieves 100% of network reliability with bounded latency, and low energy consumption.