Project 2

Aim:

Using MATLAB/simulink and  the drive cycle from the attached excel sheet, find-

1. The max heat generation of the battery 
2. The SOC of the battery at 2 *104second of the battery operation

Time	Time Step	Battery Current
00:00.4	0.1	-0.9632
00:00.5	0.2	-0.952
00:00.6	0.3	-0.9072
00:00.7	0.4	-0.9632
00:00.8	0.5	-1.0304
00:00.9	0.6	-0.9632
00:01.0	0.7	-1.0304
00:01.1	0.8	-1.008
00:01.2	0.9	-0.9856
00:01.3	1	-0.9632
00:01.4	1.1	-0.9184
00:01.5	1.2	-0.9296
00:01.6	1.3	-0.9296
00:01.7	1.4	-0.9296
00:01.8	1.5	-0.9184
00:01.9	1.6	-0.9408
00:02.0	1.7	-0.896
00:02.1	1.8	-0.9072
00:02.2	1.9	-0.9072
00:02.3	2	-0.9408
00:02.4	2.1	-0.9296
00:02.5	2.2	-0.9296
00:02.6	2.3	-0.9968
00:02.7	2.4	-0.9968
00:02.8	2.5	-0.9408
00:02.9	2.6	-0.9408

Battery resistance

2 milli ohm

Consider the battery resistance is 0.5 mOhm, delta time is 0.1 and entropic factor is 2

   1.The max heat generation of the battery 

     Max.heat generated = I^2 * R * T

                                  = 0.896^2 * 0.5 * 120

                                  = 48.1 J

   Total heat generated = Joules heat + 2

                                  = 48.1 + 2

                                  = 50.1 J

   2.The SOC of the battery at 2 *104second of the battery operation

 Simulink model:

Signal block is the input to this soure. 

Signal block is connected to controlld current source.

Controlled current source possitive is connected to the positive resistance.

Negative resistance is connected to the possitive of the battery.

Negative of current controlled source is connected to the battery negative.

Battery output is connected to the bus selector and it is connected to the scope.

Battery :

Parameters:

Discharge:

 Graph output:

 As given run time is for 208 seconds.

State of charge is decreased by 1%.

Current increase and decrease for 3 seconds and remains constant.

Voltage decreases from 8.4 to 8.1.