FablabSU

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Meeting Date: 15-2-2022
Location: Polytechnique and Sorbonne Université
People present: Stanislas, Lilit
# of Hours: 3.5 hours (+ 1.5 hours from 8-2-2022)
# of Hours Planned: 4 hours
Total # of Hours YTD: 9 hours

Planned tasks to complete:
The plan for the day was to:
Understand how cells are electrically connected
Complete IV measurement on cells
Come up with module design - must be possible to create with low cost resources, accessible and efficient
Inventory of module components

Summary of today’s meeting:
Sizing of the panel, measurements based on voltage and size of the cell. About 20 cells will be needed if the voltage of the cell is 0.6V to receive 12V total. See below for the planned sizing. The height may need adjustments based on the bus wiring distance and exit wire connections.


Understanding how the cells are electronically connected.
Connecting tab wire to the negative side of the cells
Then to solder the negative side to the positive side
Steps for this process was recorded in another file named “Steps for DIY PV”
Understanding the bus wire connection and research on which material to use for the panel
Inventory of module components:
Available: Cells, flux pen, tab wire, bus wire
Need: panel material (when chosen) front and back, frame,  exit wires, diode
Plexiglass is cheaper and transmits more, better insulation properties which make it resistant to intense sunlight and cold. Tempered glass has a longer life span and better resistance against hard-impact forces. 
The idea now is to use plexiglass, metal frame and resin or EVA as the back seal
Action items:
Plan for next week: 
Choose and order panel materials
Begin IV measurements of good cells to be used for the panel
Begin soldering the negative side contacts of the cells
Verify the design sizing
Planning for characteristic measurements

FablabSU

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