Tag: Electric and Hybrid Vehicle Technologies
Review compares lithium-ion battery state-of-charge estimation methods
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in EngineeringWhat the study found This paper reviews methods for estimating the state of charge (SOC), meaning the remaining charge, of lithium-ion batteries in electric vehicles. It describes the approaches in terms of their algorithms, mathematical models, strengths, weaknesses, and error rates. Why the authors say this matters The authors say SOC is an essential parameter…
PTFE membrane showed lower thermal stress than Nafion
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in EngineeringWhat the study found Using PTFE (polytetrafluoroethylene, a heat-resistant plastic) membrane instead of Nafion in a fuel cell reduced thermal stress by 44% in the study's simulation. Why the authors say this matters The abstract says membranes are necessary for fuel-cell chemical reactions, and that temperature changes generate thermal stress that affects membrane performance. The…
Fuel-cell truck study finds major energy and thermal losses
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in EngineeringEnergy flow analysis of a fuel-cell hybrid electric heavy-duty truck reveals 47.98% stack efficiency and identifies thermal management as critical bottleneck for powertrain optimization
High-speed planetary gearbox for electric vehicles is made smaller and lighter
Development of high-speed planetary gearbox for electric vehicles using double-crown gears with optimized bearing support configuration and advanced material selection methodology.
V2G cycling impact on lithium-ion cell lifetime depends strongly on temperature
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in EngineeringStudy quantifies lithium-ion cell degradation from vehicle-to-grid cycling using real-world EV charging data, revealing that shallow V2G cycling at moderate depths maintains cell functionality.
