Battery knowledge · Safety and abuse
Thermal-runaway energy
The heat a cell releases when it fails, which exceeds its stored electrical energy because decomposition reactions add heat of their own. Calorimetry on 18650 cells has measured decomposition energy up to about twice the electrical energy, and combustion of the vented contents up to about six times, so a battery fire carries far more energy than its kWh rating. [1]
- Also called
- heat release in thermal runaway, total heat release
Example
Safety and abuse: an example situation
A low normal-load temperature does not demonstrate thermal-runaway containment.
Read Thermal-runaway energy 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
Technical references
- Thermal runaway mechanism of lithium ion battery for electric vehicles: A review
Xuning Feng et al. · Energy Storage Materials · 2018
Technical reference · Electrical, mechanical and thermal abuse; thermal-runaway mechanisms and propagation.