Cleanroom

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.

Connected concepts

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

Cell assembly

The second phase of cell production: building the electrode–separator stack by winding or stacking, welding the tabs, inserting it into the case and filling the electrolyte. Most of it happens in the dry room.

Dry room

A production room whose air is kept extremely dry — dew points around −30 °C to −60 °C — so that no moisture reaches the cell while the electrolyte goes in. Water would react with the salt LiPF₆ to form hydrofluoric acid.

Internal short circuit

An unintended electronic path between the electrodes inside a cell — through a metal particle, a burr, a damaged separator or lithium deposits. It discharges the cell internally and turns its energy into local heat.

Metal particle contamination

Stray fragments of iron, copper, zinc or steel from raw materials, worn equipment or cutting. A particle tens of micrometres across can pierce the separator, or dissolve and regrow across it, causing high self-discharge or a latent internal short circuit — the cause of the 2006 laptop battery recalls. Magnetic filters, cleanroom discipline and K-value screening keep them out.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. Current and future lithium-ion battery manufacturing

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

   Topic background · Electrode preparation, cell assembly, formation and manufacturing trade-offs.