Design and application of Battery Electric Vehicle (BEV) power information acquisition system based on CAN bus

electric vehicle refers to the vehicle whose electric motor is driven in whole or in part by electric energy as power system. The most common classification includes Battery Electric Vehicle (BEV), Fuel Cell Vehicle (FCV) and Hybrid Electric Vehicle (HEV). The paper designs and applies one electric vehicle battery testing system on account of the characteristic of series battery pack in BEV and shortcomings of common battery test method. The system mainly includes isolated examination of EV battery pack voltage using the way of "bridge capacitor", designing hardware circuit of battery test system, finishing the manufacture and debugging of hardware circuit, solving the systematic sampling, communication and other related issues in the process of debugging, ensuring the stability of the system, designing and applying the master management and control software in battery testing system.