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
Insulators
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

Higher thermal sensitivity look at the cell heating still shows no dents

Higher thermal sensitivity look at the cell heating still shows no dents
A better look at the cells for effects of the dents

The thermal images are in a special JPEG format that stores the ratiometric thermal data for each pixel, so reprocessing the image with different thermal scales and ranges is possible.
I reduced the thermal range represented by the color scale to show any thermal gradients across the cells, and still no sign of the dents, so I don't think it effects the cell performance at least in the limited samples I have.

The images is really 19,200 individual IR thermometers, so there is a lot of data there.

The test fixture photo with a few more thermal points
My dinner of some Polish Pierogies, the hot microwave, and a scary picture of the wife.