Wolf already posted a link to the sheet I'm using, Daromer has posted his harvestingflow chart several times across the forum which , if you haven't read yet,is a great place to start.
I've found it absolutely necessary to work out a system in order to quickly and accurately log cell information (I have minimal free time at home). This has led to a couple pieces of kit to facilitate an orderly process.If you check out my google drive (link in signature) I've got photos of my resting setup, and a box to maintain cell order, both are based on the cheap and available cell holders.
My process is:
I use a YR1030 to measure the voltage and IR of each cell,write that on the cell, and then put the cell into the "inbox". Then, when the cell is going to be charged, I put four cells into the charger (Opus) andenter the voltage,IR, and cell model for each cellinto the spreadsheet. I always work from left to right on the charger.Once the cells aredone charging I write down the capacity measurement on the cell and log it in the spreadsheet, then put the cells in the resting setup. The resting setup has 24 columns, two for each day of the week in a 2 week (14 day) cycle, one column each day for the morning charge, and one for the evening charge.Working from left to right on the charger I pull the cell and place it from top to bottom in the resting setup in the columncorresponding to the correcttest slot (day of the week/time of day). If I miss a charging time I just skip a column in the resting set-up. I progress through the resting setup each day of the week, measuring the resting voltage of the cell that is 14 days old, and placing new cells in t rest. When I measure the 14-day resting voltage I enter that value in the spreadsheet.The spreadsheet is set up to flag if the cell passes all criteriaor not. Pass conditions are >2000mah, >80% remaining capacity, and 14 day resting voltage >4.12V. If the cell passes, I assign it a project cell number, and then place that cell in the next position inthe current order box. The order box is a 10x10 grid of cell holders so I can store 100 cells at a time and easily locate a cell within the grid (I number the 10's and 1's columns).
It's taken a bit for me to refine my process to this point, but now I can process8 cells a day while logging all the data I'm interesting in, in less than 10 minutesand keep those cells in an exact, easily searchable, order for later use. If I can keep up the pace of 8 cells a day for at least 300 days in a year I will have tested 2400 cells, and while I'm not currently screening cells based on IR, if I had the supply to do so and still keep up, you'd likely have nearly 100% cell pass rate, easily enoughfor a 14s150p wall.
