EV & Battery Manufacturing calculator
Cell Capacity Variation Sorting Capacity Calculator
Cell capacity variation drives grading, matching, module balance, and pack performance. This calculator helps battery test teams estimate how many cells can be screened and accepted into usable capacity bins during a production window.
What this calculator does
- Estimate usable capacity-screening output from cells per grading cycle, available cycles, tester uptime, and acceptable bin yield.
- a grading or test team needs to know whether capacity screening can keep up with formation and module assembly
- Returns usable cells after capacity grading capacity and bin-yield losses.
Formula used
- Gross capacity-screening output = cells per grading cycle × available grading cycles
- Usable capacity-graded cells = gross output × tester uptime × acceptable bin yield
Inputs explained
- Cells screened per grading cycle: Use the number of cells a tester group can capacity-grade per cycle.
- Available grading cycles: Use available screening cycles in the shift, day, or planning window.
- Capacity tester uptime: Account for tester downtime, fixture issues, data holds, and loading delays.
- Acceptable capacity-bin yield: Use cells that land in bins usable for the module or pack plan.
How to use the result
- Use it for grading-room planning, module matching, launch ramp support, and tester investment reviews.
- It does not calculate statistical variation, Cpk, impedance matching, or exact bin distributions.
Common questions
- What is acceptable bin yield? It is the share of screened cells that land in capacity bins approved for the planned module or pack.
- Should off-grade cells count? Count them only if they can be used in another approved product; otherwise they belong in yield loss.
- How is this related to variation? High variation usually lowers acceptable bin yield or forces more inventory into nonpreferred bins.
- How can I use the result? Use it to size tester capacity and protect module assembly from grade shortages.
Last reviewed 2026-05-12.