Abstract
One of the most critical parts of Electric Vehicles (EVs) is the Battery Management System (BMS). Replacing the traditional wired bus of the BMS by a wireless network brings several benefits. Since it is a critical application, the wireless network has to meet strict requirements such as low energy consumption, bounded latency, and high reliability. In this paper, we propose 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 coordinate the data plane, we introduce a reliable and predictable schedule based on the Low Latency Deterministic Network (LLDN) Group Acknowledgement (GACK) method to dynamically manage the retransmissions. To validate our proposal, we implement a Wireless BMS (WBMS) network for the Renault Zoe battery pack. After conducting several experiments, we demonstrate that our proposed architecture outperforms a traditional retransmission based strategy and achieve 100% of network reliability with bounded latency, and low energy consumption.
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