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Safe working, tools and hazard management
Published in Tom Denton, Electric and Hybrid Vehicles, 2020
When working on EVs, normal protection should be used such as wing covers, floor mats etc. Disposal of waste materials is no different from ICE vehicles, with the exception of the high-voltage battery. If high battery stacks/modules develop a fault, it is possible that thermal runaway can occur. Thermal runaway refers to a situation where an increase in temperature changes the conditions in a way that causes a further increase in temperature, often leading to a destructive result. It is a kind of uncontrolled positive feedback.
The Evolving and Expanding Synergy Between Moore’s Law and the Internet-of-Things
Published in Lambrechts Wynand, Sinha Saurabh, Abdallah Jassem, Prinsloo Jaco, Extending Moore’s Law through Advanced Semiconductor Design and Processing Techniques, 2018
Lambrechts Wynand, Sinha Saurabh
Heat dissipation during resource-intensive tasks can be an effective technique to avoid thermal damage, typically caused by thermal runaway. However, researchers and designers are increasingly interested in improving the core efficiency of IoT devices, not only to limit heat generation but also to extend the lifetime of devices powered by either batteries or renewable sources. The following section reviews IoT core energy efficiency.
Batteries
Published in Cary R. Spitzer, Uma Ferrell, Thomas Ferrell, Digital Avionics Handbook, 2017
For sealed-cell batteries, only constant current or pulse current methods should be used. Constant potential charging can cause excessive heating, resulting in thermal runaway. Special attention must be given to the charge termination technique in sealed-cell batteries, because the voltage profile is relatively flat as the battery becomes fully charged. For example, it may be necessary to rely on the battery’s temperature rise rather than voltage rise as the signal for charge termination.
Prediction of self-heating in detergent powders for application to spray dryer wall accumulations
Published in Drying Technology, 2020
Lewis Maxfield, Luis Martindejuan, Andrew E. Bayly
Self-heating is the process by which some materials increase in temperature without the application of an external energy source. An exothermic reaction within the material causes the temperature to rise and the stability of these systems is a balance between the internal heat generation and heat loss from the system boundaries. Many materials exhibit self-heating behavior including milk powder,[1] coal,[2] and biomass,[3] and this behavior can cause problems in the processing and storage of these materials. During the spray drying of detergent formulations, layers of powder can build-up on the hot internal walls of the spray drying tower. If this build-up is of sufficient thickness and the local temperature high enough, the powder in these layers can self-heat. This can cause the powder to char which compromises the final product quality. In the worst cases, thermal runaway can occur, whereby an uncontrollable exothermic reaction leads to a rapid and often dangerous increase in temperature. Being able to understand this behavior and predict the self-heating of these materials aids in product quality assurance and the minimizing of risks in the process.
Experimental studies of a static flow immersion cooling system for fast-charging Li-ion batteries
Published in Experimental Heat Transfer, 2023
Hemavathi S, Srirama Srinivas, A S Prakash
Therefore, a fast charge event of 2C or 3C at 25°C can occur several times, thus reducing both the usable cell capacity and lifespan. In the worst-case scenario, thermal runaway can occur if heats are not properly controlled in a cell, resulting in fires and explosions.