Transcript SPOC - UCF EECS

TEAM 28 (S.P.O.C.)
Solar Power Optimized Cart
TEAM MEMBERS


Cameron Boozarjomehri

Computer Engineer

Team Leader


Team Mentor

Consultant (Supreme Overlord)
Jacob Bitterman

Electrical Engineer

Hardware Lead (Leader of away
team)

William Ellett

Computer Engineer

Software Lead (redshirt 1)
Dr. Richie



Zaza Soriano
Being a Swell Guy
Sponsor

Duke Energy

Desire to work with Solar Technology

Interested in transportation project

Environmental conservation interests

Have an excuse to drive a golf cart to and from campus
MOTIVATION
CURRENT METHODOLOGY (SEV)
►Solar Electric Vehicle
►Gas Power converted to Electric
►Cost: $25,000
CURRENT METHODOLOGY (TESLA SUPERCHARGER)
►Solar Power station for the model S
►Electric car using charge stations
►Cost: $62,400 (1,170 for Vehicle Dock)
►Super Charge station incorporate PV cells (Separate Assembly)
CURRENT METHODOLOGY (UCF ZENN)
►Zero Emission No Noise
►Electric Car modified with a PV array
►Cost: $15,995 (just car, no integrated PV hookup)
►Range of 35 Miles
GOALS



Electric vehicle

Powered solely by photovoltaic cells

Able to drive as long as possible given adequate sunlight

Able to charge while driving
Vehicle drive modes to control performance

Performance mode

Balanced mode

Eco mode
Clearly Demonstrate vehicle information to user

Battery life/longevity

Vehicle current mode

Charge time

Range
SPECIFICATIONS

Cart can reach top speeds in excess of 10 miles per hour

Considered normal for this model cart

Cart will have parallel charging circuits

Vehicle load capacity of 700lbs (including passengers and all components)

Charge from no energy in 6 hours during optimal sunlight exposure
SPECIFICATION CONT.

Rear panel adjustable with 80º of freedom to optimize solar energy collection

Optimization system that suggests best panel angle to within 5º

User Interface

Displays current drive mode (Performance, Balanced, Eco Boost)

Display current maximum range in miles +/- 1 mile

Display speed in mph to nearest 1/10th of a mile

Display energy absorption rate in watts to nearest watt

Battery charge percentage accurate to nearest whole percent
GOALS/SPECIFICATIONS OF DRIVE MODE
Drive Mode
Performance
Balanced
Eco Boost
Tuning
Favors Speed
Behaves Normally
Favors Range
Requirements
Cart is able to surpass
factory restricted top
speed
Vehicle operates
within standard
factory settings
Cart is able to surpass
factory specified top
range
Performance Targets
Cart can go in excess
of 14 mph
Cart can travel more
than 25 miles
between charges
Cart travels as long as
possible past 25 miles
between charges
Intended Design
settings
Vehicle uses both
battery and solar
panel output to
maximize speed and
acceleration
Cart uses battery
power only for normal
cart function
Combines Battery
and Panels in parallel,
while limiting
speed/acceleration
to maximize range

All drive modes have emergency shutoff to protect cart components
OVERALL BLOCK DIAGRAM
Solar
Panels
MPPT
Batteries
MicroController
Bluetooth
Onboard
Display
Governor
/Motor
COMPONENT POSITIONING (SIDE)
Solar
Panels
5’ 4”
Display
Microcontroller
Housing
5’ 7.5”
Battery
Housing
*Banana for Scale
7’ 9.5”
COMPONENT POSITIONING (BACK)
3’ 3”
3’ 11”
Microcontroller
Housing
5’ 4”
5’ 7.5”
VEHICLE (GOLF CART)
Specs
E-Z-GO Freedom-TXT
36 Volt Electric Golf
Cart (2005)
Energy Source
Trojan 105h 6Volt
Deep Cycle wet
battery (x6) DC
Motor
36-volt 4-hp@4400 rpm
(can handle up to 48
volts)
Projected Top Speed
20mph
Realistic top speed
10mph
Load Capacity
800 pounds
Price
$1,600.00 after tax
PHOTOVOLTAIC OPTIMIZATION
Solar
Panels
MPPT
Batteries
MicroController
Bluetooth
Onboard
Display
Governor
/Motor
SOLAR (PHOTOVOLTAIC) PANEL
Specs
Grape Solar GS-S-390TS
390-Watt
Monocrystalline Solar
Panel
Grape Solar GS-S-250- Power Film Solar
Fab5
Charger, RV-15-3900
250-Watt
60-Watt
Monocrystalline Solar
Panel
Rated Power
390W
250 Watts
60 Watts
Watts
341 (PTC)
222.1 (PTC)
54.5 (PTC)
Max Voltage
49.4V
31.7V
15.4V
Cell Efficiency
15.2%
15.4%
10.6%
Dimensions
LxWxT
77.2” x 51.5” x 1.57”
64.6” x 39” x 1.57”
80.05” x 26.14”
Flexible
Price
$969.00
$374.99
$1,382.00
MICROCONTROLLER
Specs
MSP430G2xx 16 bit
Microcontroller
ATmega328
Operating Voltage
1.8-3.6V
1.8-5.5V
Flash Memory
56Kbytes
32Kbytes
I/O Pins
14/20
32
Operational Range
-40 to 85C
-40 to 85C
IDE
MSP-EXP430G2
Arduino IDE
Price
$12.50
$12.84
MPPT SENSORS
Specs
Phidgets RB-Phi-86
Precision Voltage
Sensor
AttoPilot
Voltge/Current Sense
Breakout – 45A
(Added to PCB)
Voltage max
40V
51.8V
Current Max
N/A
44.7A
Current offset
3.6mA
≈0
Easily added to PCB?
no
yes
Dimensions
LxWxT
19mm x 19mm x 4mm
Approx.
19mm x 15mm x 4mm
Price
$19.00
$19.95 (x2)
MPPT DESIGN
DC-DC converter
DC-DC converter
COMPONENT POSITIONING (BATTERIES)
Thermal
Sensors
18 Volts
per circuit
Thermal
Sensors
BATTERY
Specs
Smart Battery 12V
40AH Lithium Ion
Battery Kit
Trojan Line Flooded
Deep cycle 6V battery
(Model T-105)
Voltage
12.8V
6V
Max Capacity
80A-H
225A-H
Weight
46.0lb
62lb
Dimensions
LxHxW
7.75” x 6.87” x 6.50”
10.375” x 7.125” x
10.875”
Temperature Range
-15 to 70 C
-20 to 45 C
Price
$672.90
$149.00
ADDITIONAL SENSORS
TMP36 – Temperature Sensor
SEN-09088 Mini Photocell
33mm
18mm
2.7 to 5.5 V
100mW Max Power
10 mV/C Sensitivity
150V Max Voltage
±1 C at -40 to 125C
(In battery operational range)
-30 to 70C
Responsive range
Dimensions
5 x 4 x 3mm
13mm lead length
Dimensions
2 x 4 x 5mm
31mm lead length
$1.50 (x6)
$1.50 (x2)
DRIVE CIRCUIT
Solar
Panels
MPPT
Batteries
MicroController
Bluetooth
Onboard
Display
Governor
/Motor
DRIVE MODES
Standard Mode
Eco Boost Mode
Performance Mode
DISPLAY
Solar
Panels
MPPT
Batteries
MicroController
Bluetooth
Onboard
Display
Governor
/Motor
COMPONENT POSITIONING (DASH BOARD)
B0
B1
USER DISPLAY
Specs
Adafruit Blue
Character OLED 16x2
Adafruit HDMI 4 Pi –
10.1” Display 1280x800
IPS – VGA/NTSC/PAL
Resolution
16 characters x 2 rows
1280x800 pixels
Lighting
LED Pixel-based
White LED backlight
Required Voltage
3/5V
5-12VDC
Easily added to PCB?
no
no
Dimensions
LxWxD
80mm x 36mm x
10mm
Approx.
230mm x 150mm x 5mm
Contrast ratio
2000:1
800:1
Price
$27.95
$144.95
USER DISPLAY
Program start
B0
Display
range
B1
Display
welcome
page
B0
Drive Mode
menu
B1
B0
Display energy
consumption
B0
Range
menu
B1
B0
Speed
menu
B1
B0
Display
current mode
B0
B0
Speedometer
B1 (change mode)
B0
Energy
menu
B0
Battery
charge menu
B1
B0
Display current
battery levels
PROJECT BUDGET
Component
Budgeted Cost
Actual Cost
Difference
$1,999.00
$1,600.00
+$399.00
$0.00
$0.00
$0.00
PV Cells
$433.95
2x $374.99
-$316.03
Screen
$149.95
$27.95
+$122.00
$91.89
$0.00
$55.00
+$36.89
$69.90
-$69.90
$2,502.83
+$171.96
Cart
Battery
Controller
Sensors, etc.
Total:
$2,674.79
TIMELINE
Panel/Component Mounting
Charge Circuit Testing
User Interface Testing
Attempting Stretch Goals
11
10
Mar
14th
Mar
7th
Feb
28th
Feb
18th
Now
Power Mode Testing
7
Apr
19th
7
-Labeled in Days
STRETCH GOAL
 Bluetooth
 PV
•
Redundant Data Distribution from display
•
Android application converts Metadata to useful displays
Optimization using GPS
•
Phone GPS used to look up module determines cart orientation
•
Cart heading relayed via Bluetooth
•
Application suggests panel angle and cart heading based on
time/position
DISTRIBUTION OF LABOR
Task
Jacob Bitterman
Battery Motor
Connection
X
Maximum Power
Point Tracking
X
X
X
X
X
Microcontroller and
Sensor Connections
User Interface
X
X
Drive Mode
Implementation
Panel Positioning
System (PPS)
William Ellett
X
X
Battery Charging
Circuit
Power Switching
and Distribution
Cameron
Boozarjomehri
X
X
X
Progress
Research
90%
Design
30%
Prototyping
10%
Testing
10%
Overall
25%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
QUESTIONS?