Supercapacitor engineering notes

Short, sourced write-ups from the module floor: how AI rack power changed with GB300, how LIC compares with EDLC and Li-ion, and what actually happens between a bare cell and a rack-ready module.

Latest notes

Three reads, all numbers

Technician sliding a supercapacitor module into an AI server rack power shelf

AI POWER · SEP 2026

Why GB300 made supercapacitors standard in AI racks

65 J/GPU inside the power supply, up to 30% off grid peak demand — how LIC modules became the millisecond tier of rack power architecture.

An EDLC cell, a hybrid capacitor cell and a lithium pouch cell side by side on a dark workbench

CHEMISTRY · SEP 2026

Choosing the backup cell: LIC vs EDLC vs Li-ion

Energy density, cycles, temperature and safety compared with datasheet-class numbers — before you commit a chemistry to the ride-through seat.

Supercapacitor module production line with a laser welding station mid-spark

MANUFACTURING · SEP 2026

Inside a supercapacitor module line

From IQC to 100% final test: the six stations that turn cells arriving at −10/+30% tolerance into modules sorted to ±5%.

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