Fault tree analysis

Example

Use in Lemonergy

Connect mechanisms with appropriate test evidence.

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.

Failure mode and effects analysis

A structured review that lists every way a component or process could fail, its effect, and how likely it is to happen and be detected, scoring each to prioritise fixes. Battery programmes run it on the cell, the pack design and the production process.

Functional safety

The discipline, standardised for vehicles in ISO 26262, of making sure electronic failures do not cause harm. Battery functions such as overvoltage protection are classified by risk into ASIL levels A to D, which set how redundant and verified their hardware and software must be.

Hazard level

A scale, 0 to 7, for grading the outcome of an abuse test: from no effect through leakage, venting and fire to rupture and explosion. Vehicle programmes typically require that no cell test exceed level 4, venting without flame.

Thermal runaway

Self-accelerating heating in a cell: heat speeds up reactions that release more heat, until the cell vents, catches fire or ruptures. An internal short, overcharge or external heating can trigger it.

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. Thermal runaway mechanism of lithium ion battery for electric vehicles: A review

   Xuning Feng et al. · Energy Storage Materials · 2018

   Topic background · Electrical, mechanical and thermal abuse; thermal-runaway mechanisms and propagation.