Battery knowledge · Safety and abuse
Onset temperature
The temperature at which a cell begins to generate heat by itself, as the SEI starts to decompose, typically 80–120 °C. Measured in an accelerating rate calorimeter, it marks the start of the path to thermal runaway, not the runaway itself.
- Also called
- self-heating onset
- Unit
- °C
Example
Safety and abuse: an example situation
A low normal-load temperature does not demonstrate thermal-runaway containment.
Read Onset temperature alongside Accelerating rate calorimetry in this context. A test in which a cell sits in an adiabatic chamber that follows its temperature, so any self-heating is not lost to the surroundings. It measures the onset temperature, the self-heating rate and the temperature at which runaway becomes unstoppable.
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.