Measuring and monitoring system for electric cars

This article describes the measuring and monitoring system for electric car. There are described basic function blocks and measuring traction batteries principles. Monitoring system enables measuring of all values, which are necessary for calculation of running time of car with electric power supply or other devices with battery source. It is composed from one on-board computer and 2 up to n slave units. The on-board computer controls a monitoring system, communicates with other ones slave units, an intelligent fast charger and a digital simulator. All slave units are connected via a vehicle CAN bus. On-board computer processes all measured quantities and informs a driver, or electric device operator, with state and operation mode of device on a display. The slave units measure values of battery cells voltage, and a battery temperature. Each of slaves unit measures seven values of voltage and one value of temperature. One of slave units is determined for current measuring.