Subsystem Design of EV Drive Train - II — Lesson 2

This lesson covers the intricate details of electric vehicle subsystems, focusing on the drive train, battery, DC-DC converter, and auxiliary control units. It explains how these components interact and their importance in the overall functioning of an electric vehicle. The lesson also delves into the concept of gear ratios and their role in adjusting the torque and speed of the vehicle. It further discusses the significance of motor controllers, battery capacity, and the impact of auxiliary power consumption on the vehicle's range. For instance, the lesson illustrates how air conditioners and heaters can significantly reduce an electric vehicle's range due to their high energy consumption.

Video Highlights

00:17 - Introduction
03:24 - Importance of gears in an EV
05:09 - Importance of thermal considerations in EV design
14:18 - Battery power used by motor and efficiency
22:56 - Concept of usable energy in a battery
31:51 - Battery power and vehicle control unit in an EV
34:34 - Home Assignment
36:25 - Impact of auxiliary power consumption on the range of an EV

Key Takeaways

- The drive train and battery are the primary parts of an electric vehicle subsystem.
- Gear ratios play a crucial role in adjusting the torque and speed of the vehicle.
- Motor controllers and battery capacity significantly influence the performance of an electric vehicle.
- Auxiliary power consumption, such as air conditioners and heaters, can significantly reduce the vehicle's range.
- The vehicle control unit acts as a data communication platform, coordinating various components of the vehicle.