Week-3 Challenge: ADVISOR Tool

1) For EV_defaults_in file, if cargo mass is 500 kg with all other default conditions, can the vehicle travel for 45 km with FTP drive cycle? Conclude your observations.

Answer:

Main model: This is modelled with EV_defaults_in with cargo mass 500 kg and FTP drive cycle and all other default conditions as shown below:

Drivecyle and other parameters setup:

a) If only single FTP drive cycle used:

Output:

• From figure above, the distance covered by vehicle under given conditions for single drive conditions is only 17.8 kms.

b) If three FTP drive cycle are used:

Output:

• From figure above,the distance covered by vehicle under given conditions for single drive conditions is only 41.4 kms.

Conclusion:

• Therefore, if we use three drive cycles the vehicle will not cover 45 kms because the state of charge becomes zero after 41.4 kms.
• So, the vehicle will mot cover 45 km with FTP drive cycle.

2. In the above case, try changing the battery capacity and repeat the simulation.

Answer:

Main model: The battery capacity increased from 308V(25 modules) to 493V(40 modules) and all other parameters remains same as first model.

Drivecyle and other parameters setup:

• In this model we use FTP drive cyle.

a) If only single FTP drive cycle used:

Output:

• From figure above, the distance covered by vehicle under given conditions for single drive conditions is only 17.8 kms. That is here only battery capacity increased.
• So, the performance of vehicle will be same as the first model.
• Only the difference is that state of charge(SOC).
• In this case the state of charge will decrase slowly comapred to the first case.

b) If three drive cycle FTP are used:

Output:

Conclusion:

• Therefore, if battery capacity increased and use three drive cycles, the vehicle will cover nearly 54 km.

3) Perform gradeability test with PRIUS_Jpn_defaults_in file and Compare your results in table and conclude.

Answer:

Main model: The model shown below is PRIUS_jpn_defaults_in and it is simulated with all default conditions and enabled gradeability test.

Gradeability test: This test is performed to know the % gradeability at a givren speed.

i) when speed = 55 mph

ii) when speed = 65 mph

iii) when speed = 75 mph

iv) when speed = 85 mph

v) when speed = 95 mph

vi) when speed = 100 mph

Comparison:

Speed (mph)	Gradeability (%)
55	8.9
65	7.2
75	5.3
85	3.6
95	2.0
100	1.3

Conclusion: From the results obtained we can conclude that as speed increases, the percentage gradeability decreases. We can understand through waveform also.

Speed ∝ 1/(percentage gradeability)

• For plotting speed vs Percentage gradeability we consider matlab code as shown below.

Matlab code:

clc
Vel=[55 65 75 85 95 100];
Grad=[8.9 7.2 5.3 3.6 2 1.3];
stem(Vel,Grad)
title('comparision speed vs Gradability');
xlabel('Speed');
ylabel('Gradeability');
grid on;

Output:

• From discrete plot above, speed is speed is inversely proportional to percentage gradeability.

Note: All the .m files are attached in "attach file" section.