Stefan Essmann
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View article: Exploring the Impact of Prior Degradation on the Performance and Lifetime of Second‐Life Li‐Ion Batteries
Exploring the Impact of Prior Degradation on the Performance and Lifetime of Second‐Life Li‐Ion Batteries Open
Second‐life batteries play a crucial role in advancing the principles of the circular economy and promoting sustainability in the energy sector. This study explores the impact of prior degradation referring to the extent and nature of agin…
View article: Ignition characteristics of hydrogen-enriched ammonia/air mixtures
Ignition characteristics of hydrogen-enriched ammonia/air mixtures Open
Ammonia is an attractive hydrogen carrier and potential fuel which could play a role in decarbonizing process heat, power or transport applications. However, the combustion properties of ammonia are disadvantageous for many technical proce…
View article: Thermal Electrical Tests for Battery Safety Standardization
Thermal Electrical Tests for Battery Safety Standardization Open
Battery safety tests are defined by several international standards in different ways and with heterogenous termination and failure criteria. In this work, lithium-ion cells were examined regarding their behavior in the event of overchargi…
View article: Experimental investigation of the stochastic early flame propagation after ignition by a low-energy electrical discharge
Experimental investigation of the stochastic early flame propagation after ignition by a low-energy electrical discharge Open
In the context of explosion protection, very conservative safety factors need to be considered, e.g. in the design of electrical devices. This is due to standards which are mainly based on empirical data as opposed to a detailed knowledge …
View article: Investigation of the Spark channel of Electrical Discharges Near the Minimum Ignition Energy
Investigation of the Spark channel of Electrical Discharges Near the Minimum Ignition Energy Open
In this work, we investigate the expansion of the hot gas kernel and pressure wave induced by electrical discharges near the minimum ignition energy experimentally by means of a schlieren setup and numerically through one-dimensional simul…