Design and Simulation of Piezoresistance Temperature Sensor for Electric Vehicle Battery Monitoring System

Abstract

Abstract This paper discusses the design and simulation of a piezo resistance temperature sensor. The sensor was connected according to Wheatstone bridge configuration. The temperature sensor The COMSOL Multiphysics software was used for this study. With a 1µm piezo resistor of the graphene layer and an optimised doping profile of 1016 cm− 3, the simulated sensitivity is 24.90 mV/oC over a temperature range of -90oC to 90oC. The simulated results reveal that the sensitivity significantly depends on the piezo resistor layer thickness, combination of the materials, shape of the diaphragm, and the size of the diaphragm. With the low thermal mass and excellent sensitivity, the suggested temperature sensors based on graphene can be employed in battery health monitoring systems.