Wireless Battery Management System for Electric Vehicles

In conventional Automotive Battery Monitoring Systems, measurements are carried out using "wired" solutions and data interchange between measuring unit and central unit takes place using isolated-CAN or isolated-SPI based communication channels. This arrangement comes with some drawbacks like considerable power dissipation, high cost, increased complexity of wiring harness and decreased accuracy. Here in this paper we present a qualitative analysis of different "wireless" communication protocols on the basis of parameters like Range, Power Consumption, Performance, Reliability and Simplicity. Implementation of wireless architecture will not only enable a monitoring system that is cheap and accurate but also result in decrease of the overall weight and size of the battery pack. A number of wireless protocols like ZigBee(IEEE 802.15.4), Bluetooth Low Energy(BLE5.0), Near Field Communication, Wi-Fi(IEEE 802.11) and Wi-Fi HaLow(IEEE 802.11ah) are considered as part of study in this paper.