Cylindrical cell

Example

Use in Lemonergy

Separate chemistry from form factor.

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.

Can

The rigid metal case of a cylindrical or prismatic cell, usually nickel-plated steel or aluminium. It holds the stack under pressure, contains the electrolyte and, in a cylindrical cell, doubles as the negative terminal.

Centre pin

A hollow metal tube placed in the core of a cylindrical cell’s jelly roll, in the hole left by the winding mandrel. It stops the winding collapsing inward and keeps a clear channel for gas to reach the vent during failure; X-ray studies of 18650 cells in thermal runaway showed unsupported cores collapsing after venting.

Jelly roll

Electrodes and separators wound together into a spiral. It is the inside of a cylindrical cell and of many prismatic cells; large pouch cells usually use stacked sheets instead.

Pouch cell

A cell sealed in a flexible bag of aluminium laminated with plastic, holding stacked electrode sheets in larger cells or a flattened wound roll in many small ones. It is light and easy to cool, but needs outside support and can visibly swell if gas forms inside.

Prismatic cell

A cell in a rigid rectangular metal case, holding either a flattened jelly roll or stacked sheets. Large prismatic cells pack tightly into battery packs.

Tabless design

A cylindrical-cell construction in which the whole uncoated edge of each foil is folded and welded to the end cap instead of one or two narrow tabs. The current path shortens from metres to millimetres, cutting resistance and heating in large-format cells.

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. A reflection on lithium-ion battery cathode chemistry

   Arumugam Manthiram · Nature Communications · 2020

   Topic background · Layered oxides, spinels and polyanion cathodes; links between composition, structure and performance.