POLITECNICO DI TORINO
I FACOLTÀ DI INGEGNERIA
INGEGNERIA DELL’AUTOVEICOLO (AUTOMOTIVE ENGINEERING)

Thesis for degree of Bachelor of Science

Electric City Car – Energy consumption analysis Supervisor: Prof. Giuliano Cozzari, Prof. Andrea Festini

Applicant: Zheng Hang

1. Introduction
1.1. 1.2. 1.3. General introduction about EV and the team project Speed and acceleration, all about an EV Basic concept in calculation

2. Energy consumption calculation in design phase
2.1. Weight and distribution effect

2.1.1. Weight and climbing 2.1.2. Weight and speed 2.1.3. Weight affect range, Balance and other important facts

2.2.

Aerodynamic effect

2.2.1. Define of aerodynamic drag force 2.2.2. Other aerodynamic contributes 2.2.3. Effective of frontal area and coefficient of drag

2.3.

Rolling resistance

2.3.1. Definition of rolling resistance 2.3.2. Combined analysis of aerodynamic drag and rolling resistance 2.3.3. Maximum power that can be transferred by the tires to the road

2.4.

Transmission efficiency analysis

2.4.1. Structures about the transmission system available 2.4.2. Efficiency of the transmission system

3. Energy consumption calculation of EV
1

3.1. Calculation methodology overview and Target specification of our EV 3.2. Calculation and evaluation of the energy consumption

3.2.1. Required and available power 3.2.2. Motor output and acceleration 3.2.3. Acceleration time evaluation of our EV

3.3.

Conclusion

4. Influence on energy output
4.1. Mileage capability analysis

4.1.1. Mileage capability verification 4.1.2. Mileage capability modification 4.1.3. Energy regeneration basic introduction

4.2.

Total energy consumption link introduction

4.2.1. Best-case scenario with Well-to-wheel assumption 4.2.2. Life cycle assessment analysis for power consumption of the