Abstract
Some battery reliability assessments may utilize separate, isolated tests for thermal, electrical, and environmental stress. These approaches may not fully capture complex failure modes that can arise from combined effects in certain operating conditions. A methodology is described for power temperature humidity cycling (PTHC) testing. The method can involve simultaneously subjecting a battery (which may be part of a device such as a smartphone, smart watch, or other wearable) to continuous and potentially asynchronous cycles of power (e.g., charge/discharge), temperature (for example, from -20°C to 60°C), and relative humidity (for example, from 10% to 90%). By combining these stressors, which can include the battery's self-heating from power cycling, the test can be used to evaluate battery reliability. This integrated approach can simulate aspects of a device's operating environment and may facilitate the detection of some failure modes, such as battery swell, leakage, and capacity degradation, that can be influenced by the interaction of multiple stressors.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Chandrashekhar, Sandhya, "Combined Power, Temperature, and Humidity Cycle Testing for Battery Reliability Assessment", Technical Disclosure Commons, (October 27, 2025)
https://www.tdcommons.org/dpubs_series/8797