Short circuit

Example

Use in Lemonergy

Use consistent units and cell/pack basis.

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

Learn it in Lesson 1 · Cell anatomy →

Connected concepts

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External short circuit

A low-resistance connection between the terminals outside the cell, driving currents of hundreds of amperes. Fuses, the current interrupt device and a positive-temperature-coefficient element are the layers of protection against it.

Fuse

A link that melts and opens the circuit when current exceeds its rating. Packs use a main fuse in the high-voltage path and often a small fuse on each parallel cell connection, so one shorted cell does not drain its neighbours into the fault.

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.

Ohm’s law

Voltage across a resistance equals current times that resistance. Applied to a cell it predicts the voltage drop under load from the internal resistance, which is the first-order reason terminal voltage sags.

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. The International System of Units (SI), 9th edition

   Bureau International des Poids et Mesures · 2026

   Topic background · Definitions of SI units and coherent derived units; 2026 revision.