Team Name :
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Transcript of Team Name :
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Team Name:
Team Members:Branden Carpenter EE SeniorJon Stoker CS SeniorMaggie Richardson EE SeniorWayne Romine EE Senior
Project Title:LSV2 (Large Scale Vehicle)
Autonomous Battery Charger
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Initial Specifications _• Must remotely access the
battery chargers– Including all displayed values
such as:• Fault Indicators• Displayed values for Current and
Voltage– As well as providing control
capability:• Ability to change voltage and
current levels• Have an emergency stop function
• Graphical user interface mush be easy to understand/use
• Remote control function must have a PC control option– Charging algorithm will be
implemented in later project– Separate control unit will be able
to implement the charging algorithm• Unit will also act as a backup if there
is a computer failure
• Design must use the current control board installed in the charging units– Units have a local remote switch
that utilizes a PCB housed inside the charger
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Preliminary Results • From initial research the RS-485 pin
connection on the PCB inside the charging unit will likely be the point of control.
• A microcontroller will need to be employed to display and control the charging units remotely.
• A separate box will be created to handle the control and display of information. – PC control will be added at a later
time– Although this box should be able to
operate indecently, connections for the PC will be an important element to our design
• A optimum charging profile was designed for a previous Senior Design project.
• This profile will be used to create a charging algorithm that will automate the charging process.
• Commercial embedded controllers exist but our team should be able to design a more economical solution for our client.
• The Client presently has a system that displays the battery charging level. Connection from that system will provide a feedback loop for the charging algorithm implemented via a PC.
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Problem Statement• Presently a battery technician monitors screen displaying the voltage and current
levels being sensed in the seven battery strings comprising the LSV2 battery bank. • Once a condition requiring action is reached, the technician must leave the computer
workstation and adjust analog knobs located on the front panel of the charging units. These units are installed in a different location of the moorage facility.
• Once the alteration is manually set on the charging unit, the technician returns to the workstation to check that the desired effect begins to take place.
• This process is repeated for each of the seven charging units at specific points in the charging process.
• The optimized profile could be better implemented if the charging profile of each battery sting are controlled autonomously.
• Our team proposes to design a configuration that allows the chargers be controlled remotely, specifically at the workstation that monitors the charge.
• With this capability it is then possible to automate the entire process and control it from any location connected to the monitoring workstation.
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Images of the USS Cutthroat
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Initial Controller Conceptual Design
C:
V:
Charger #1 #2 #3 #4 #5 #6 #7
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UP
DN
UP
DN
Input Current
Input Voltage Select
charger
Charger #
Input voltage value
Input current value
Enter Voltage
Enter Current
Local /PC Toggle Switch
Fault Indicators