Cell finishing

Example

Use in Lemonergy

Place operations and quality checks in process order.

This is a reference concept. No executable Lemonergy block has been verified for this term.

Learn it in Lesson 3 · Cell production →

Connected concepts

Related concepts from the knowledge graph. Connections show context, not cause and effect. Hover or focus a linked term for its definition.

Aging (production)

Storing freshly formed cells for days to weeks, at room or elevated temperature, so the SEI stabilises and any cell with a latent short reveals itself through voltage drop. Not to be confused with aging as degradation over a cell’s life.

Cell production

The three-phase process that turns powders and foils into finished cells: electrode making, cell assembly and cell finishing. Electrode making is a roll-to-roll chemical process; assembly is precision mechanics; finishing is electrochemistry that takes weeks.

Degassing

Removing the gas a cell releases during formation. A pouch cell’s extra gas pocket is opened in a dry atmosphere, emptied and sealed off; large prismatic cells often vent through their fill opening before final sealing.

End-of-line testing

The final measurements on every finished cell — capacity, internal resistance and open-circuit voltage — used to reject faulty cells and sort good ones into matched grades.

Formation

The first controlled charge and discharge cycles of a newly assembled cell, during which the SEI forms. It is part of cell production, before aging and grading.

References & further reading

Technical references

1. Current and future lithium-ion battery manufacturing

   Yangtao Liu, Ruihan Zhang, Jun Wang, Yan Wang · iScience · 2021

   Technical reference · Electrode preparation, cell assembly, formation and manufacturing trade-offs.