Battery knowledge · Safety and abuse
Intumescent material
A material that swells to many times its original thickness when heated, forming a porous char that insulates whatever lies beneath. Applied as coatings on pack lids or as pads between cells, it stays thin in normal service and expands only during a thermal event, which suits the tight spaces inside a battery.
- Also called
- intumescent coating, intumescent pad
Example
Safety and abuse: an example situation
A low normal-load temperature does not demonstrate thermal-runaway containment.
Read Intumescent material alongside Aerogel in this context. A solid foam, usually of silica, that is mostly air held in nanometre-scale pores, giving a thermal conductivity of only about 0.015–0.02 W/(m·K). Sheets a millimetre or two thick between cells slow heat transfer during a thermal event, though they must keep their insulation under the compression of swelling cells.
Use in Lemonergy
Connect mechanisms with appropriate test evidence.
This is a reference concept. No executable Lemonergy block has been verified for this term.
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.
- 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.