Battery knowledge · Testing methods
HALT and HASS
Two step-stress methods for electronics. HALT pushes prototypes through rising temperature, rapid thermal cycling and multi-axis vibration far beyond specification to find weak points and margins; HASS applies a gentler, proven fraction of those stresses to production units to catch manufacturing defects. Battery packs use them for BMS boards, connectors and solder joints.
- Also called
- highly accelerated life test, highly accelerated stress screen, HALT, HASS
Example
Testing methods: an example situation
Resistance immediately after a current step can differ from a ten-second value because slower polarization contributes.
Read HALT and HASS alongside End-of-line testing in this context. The final measurements on every finished cell — capacity, internal resistance and open-circuit voltage — used to reject faulty cells and sort good ones into matched grades.
Use in Lemonergy
Record specimen, state, instrument, temperature and timing.
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.
- Battery Test Manual For Electric Vehicles, Revision 3
Jon P. Christopherson · Idaho National Laboratory · 2015
Topic background · Performance characterization, pulse resistance/power, life testing and reference performance tests; historical 2015 edition.