Battery knowledge · Safety and abuse
Exothermic and endothermic
A reaction that releases heat is exothermic; one that absorbs it is endothermic. Thermal runaway is a chain of exothermic reactions; a few cell processes, such as graphite lithiation at some stages, are mildly endothermic and cool the cell.
Example
Safety and abuse: an example situation
A low normal-load temperature does not demonstrate thermal-runaway containment.
Read Exothermic and endothermic alongside Entropy coefficient in this context. The change of open-circuit voltage with temperature, dE/dT, usually a fraction of a millivolt per kelvin and varying with state of charge. It sets the reversible heat a cell absorbs or releases, which can be a large share of total heat at low current.
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.