1.1 The Structure of the Powertrain System+ 1.2 The Respective Roles of the Poewrtrain System+ 1.3 The Layout Forms of Poewrtrain Systems and the Power Transmission Routes+ 1.4 The Functional Modes of the Poewrtrain System+ 1.5 The Structure of the Electric Vehicle Cooling System+ 2.1 The Performance Requirements of the Electric Vehicle Drive Motor+ 2.2 The Classifications of Electric Motors Used in Electric Vehicles+ 2.3 The Structure of a DC Motor (1)+ 2.4 The Structure of a DC Motor (2)+ 2.5 The Structure of Three-phase Asynchronous Motors+ 2.6 The Structure of Permanent Magnet Synchronous Motors+ 3.1 The Structure of a Motor Controller+ 4.1 The Structure and Working Principle of the Reducer+ 4.2 The Significance and Constraints of Regenerative Braking+