Hello, dear friend, you can consult us at any time if you have any questions, add WeChat: daixieit

EE3012 Assignment

Modelling of a Battery-Electric Vehicle

Abstract— In this research assignment for EE3012, the student is required to research the assigned battery-electric vehicle (BEV), model the BEV in a number of ways, and submit a related report.

Keywords—electric vehicles, modelling, Matlab, Simulink

I. Introduction

In this assignment the student is introduced to the modelling of electric vehicles. Software, vehicle modelling, feedback control, and report writing also feature as part of the project work. Life cycle assessment is a new topic for 2023-2024.

II. The Assignment

Research your assigned vehicle in order to complete all the information required in Table 2-1 [1]-[3], [8]. Recreate the relevant figures as noted below. Follow the classes week by week and submit the final report at the agreed date. This assignment is worth 15 %.

The report is to have the following key sections.

1) Abstract of 200 words maximum

2) Introduction to vehicle and assignment. Discuss your vehicle in light of the related developments at the company and the evolution of the vehicle itself.

3) Main body with text and brief theory/equations to cover results.

4) Results section with the following plots

· Plot of road-load power vs. speed (Figure 2-3).

o Student to generate related Matlab code.

· Plot of range of vehicle vs. speed (Figure 2-4).

o Student to generate related Matlab code.

· Plot of rated power and torque of the traction machine (Figure 2-7).

o See the code in Section 2.6.1.

· Plot of vehicle acceleration (Figure 2-8).

o See the code in Section 2.6.2.

· Plot of vehicle acceleration using feedback control and Simulink.

i. Using a PMDC machine;

ii. Using a WFDC machine.

5) A life cycle assessment (LCA) for your vehicle.

A life cycle assessment measures the environmental impacts of a product, such as a vehicle, from the sourcing of raw materials to manufacturing, transportation, usage and end-of-life. A common metric to use is the equivalent mass of CO₂ emitted from the over cycle in units of kg or tonnes of CO₂eq.

o Develop a LCA for your vehicle based on your own research and referenced to the Fisker LCA [7].

§ You need to know the key info on vehicle mass, battery chemistry, battery capacity, battery mass, and number of motors.

Phase 1: page 11, scale battery on gross size in kWh and chemistry (LFP or NMC)

Phase 2, 3 and 5: Use same as for Fisker, unless you find otherwise.

Phase 4: Use 15,000 km/year for 15 years at 0.234 kgCO₂eq/kWh. Reference fuelconomy.gov for the consumption of your vehicle in kWh/mile.

o See pages 1, 9, 11, 12, 13, 13, 16, 19 and 11 for relevant Fisker numbers.

6) Summary and Conclusions

7) Appendix

III. Estimating the Wheel Radius

The actual wheel radius can be calculated as follows. Consider both methods.

A. N/V Ratio Method

The effective wheel radius can be determined from the N/V ratio in column X of [2].

B. Tire Specification Method

The tire radius can also be determined based on the tire specification as per the following example [4].

The Model S tire is specified as follows: 245/45YR 19.0.

Thus, the standard tire for the Tesla is 245 mm wide.

The aspect ratio is 0.45, and so the tire height is 245mm x 0.45 = 110.3 mm.

The wheel rim diameter or the internal tire diameter is 19 inches (482.6 mm).

The tire diameter is twice the height plus the rim, 2 x 110.3mm + 482.6 mm = 592.82mm

The tire radius is half the diameter, r = 296.4mm.

IV. Guidelines on Report

Each individual is to submit a project report of no more than 5 pages plus the appendix. The appendix should contain your new Matlab files, if modified. The following notes should help with your report writing.

1) Use a single-columned format with a 1.5 line spacing with similar guidelines as the double-columned format of the IEEE conference template [5].

2) Do not plagiarize – write in your own words.

3) Use three to four significant digits maximum – it’s all an approximation after all.

4) Write the units correctly with a space between the number and unit, e.g. 100 kW, 60 km/h;

5) Be consistent with tense: is, was, will;

6) Do not overuse passive, occasional use of personal is acceptable;

7) A table is a Table, not a figure.

8) Be clear and consistent with equation format.

9) Number the equation.

10) Use page numbers;

11) Correctly reference sources.

12) Proofread for grammar when done – do not rely on your  computer. Reference [6] is a great resource.

13) Upload to Canvas.

References

[1] J.G. Hayes, G.A. Goodarzi, Electric Powertrain: Energy Systems, Power Electronics and Drives for Hybrid, Electric and Fuel Cell Vehicles, John Wiley & Sons, January 2018.

[2] Test car list data files webpage of USA EPA: http://www3.epa.gov/otaq/tcldata.htm

[3] Fuel economy labelling by USA EPA: http://www.fueleconomy.gov

[4] http://www.carsdirect.com/2015/tesla/model-s/specs

[5] https://www.ieee.org/conferences/publishing/templates.html

[6] Oxford Primary Grammar, Punctuation and Spelling Dictionary

[7] Fisker Ocean Life Cycle Assessment 2023

[8] https://ev-database.org/