New England Hybrid Festival 2013
Mikes You Tube Videos
Mikes Saturday Hybrid-Solar- Electric Workshop
Insight 20 AH lithium battery system
assembling the pack core
BMS board mounting position?
Capturing the mounting boss positions
Cell tester is modified and lithium test fixture takes shape.
Charging experiments
Cleaning the cell tabs
fixing and deburring the heat spreaders
Final assembled pack core
Finishing the connection blocks
finishing the fins and end plates
First discharge graph
Getting started on the final design and build
Heat sink fins
heatsink vs no heatsink comparison
Higher thermal sensitivity look at the cell heating still shows no dents
Hot and cold cells compared.
How do the big guys do it
Is using this asking for a problem?
main I/O terminals and Heat shrink
Making the 50 insulating strips
Painted cells to increase emissivity
Punching the holes in the tabs
Same discharge with huge heat sink on one side of cell
Testing the fans and layout of the BMS boards
The Battery case starts to take shape
The case is nearly finished
the connector plate is made and mounted
The tab punch
The world in IR Cool
Grid charger Users page
Mikes Surplus Loft
Renewable energy exhibits
New England Hybrid festival 2014

fixing and deburring the heat spreaders

fixing and deburring the heat spreaders
cleaning up the heat spreaders

When I went to do a dry assembly of the heat spreaders, I saw that the drill had wandered by as much as 1/8"when I drilled all of them together with the 1/4" plates. This will cause issues later so I took each plate and milled a corrected hole in the exact correct position, which ment 55 X 4 more operations, there goes another part of a day.
Once finished, the plates need to be cleaned up.
Decided that if the aluminum heat spreader plates were very thoroughly deburred, that there should be no issues with a cell/heatspreader/cell/heatspreader sandwich construction, so I spent the better part of a day cleaning up and deburring the plates.