Search results for "business.product_category"
showing 10 items of 376 documents
Battery technologies for electric vehicles
2017
This chapter gives a brief overview of the following types of vehicles: battery electric vehicle (BEV), plug-in hybrid electric vehicle (PHEV), and hybrid electric vehicle (HEV). It then provides a comprehensive summary of the electrochemical energy storage including Ni-MH battery, Li-ion battery, and advanced rechargeable battery. Battery chemistry is explained in a detailed manner including an abbreviated modelling approach. Also, the issues of battery-charging method, management, and monitoring are addressed. The chapter concludes with a discussion on battery cell voltage balancing and temperature monitoring in addition to the battery state-of-charge (SOC) estimation.
Modeling and experimenting the thermal behavior of a lithium-ion battery on a electric vehicle
2018
This paper deals with an electro thermal model of a lithium-ion battery for hybrid and electric vehicles. It was developed to study the behavior of lithium-ion battery key parameters. The thermal model, under Matlab/Simulink, is capable of predicting the voltage, current, State of Charge and temperature of the battery. Thereafter, the thermal behavior of the battery was studied under different operating conditions. The results of the simulation were compared with experimental measurements carried out by thermocouples and thermal camera on a test bench. Finally, the model has been validated on the NOAO electric vehicle.
A Bidirectional IPT system for Electrical Bicycle Contactless Energy Transfer
2019
Contactless Energy Transfer characterized by Inductive Power Transfer (IPT) is a viable solution for Electric Vehicle (EV) battery charging, giving advantages in terms of safety, comfort and automatism of the recharging operation. IPT is a smart option for the Vehicle- To-Grid (V2G) implementation as well: the EV's battery can provide power to other users, if possible and if required, in order to adequately respond to an active demand scenario. IPT shall therefore allow a Bidirectional power flow, so that it can be properly defined as Bidirectional IPT (BIPT). In this paper, a 300 W BIPT system for E-bikes is proposed and experimental results are shown as well. Considering power level and s…
Tracing battery usage for second life market with a blockchain-based framework
2021
This work describes the design of a platform based on a permissioned blockchain for sharing relevant information among the actors involved in grid service provision programs. The information collected by a proprietary monitoring on-board system accessing the central unit of the Electric Vehicle, EV, is then sent to a dropbox folder owned by the car owner and then written on a blockchain platform. The platform could be supplied from similar data from the grid operator collected on the grid during the provision of services. In this way data can be validated and used for tracing the health status of the EV's battery. The design of customized smart contract allows to acquire the profiles of bat…
Water Conflict and Water Management in the Middle East
2004
“Water is Life”: this is often forgotten in countries with abundant water ressources. As a ressource it only gains importance once it is in short supply or once its quality declines. In the case of shortage the battle for water becomes inevitable. At the moment we have up to 200 conflicts of border-crossing water systems in the world. The Middle East is considered to be a typical example of this politically significant problem
BIO-Bragg gratings: structured molecular networks for on-fiber bioanalysis
2021
The research on photonic biosensors is a scientific hot topic at the moment, with a significant potential impact on industry and medicine. Label-free, miniaturized, inexpensive and low-loss biosensors are developed based on optical fiber technology. Our approach is based on a Bio-Bragg-Grating (BBG) patterned on the surface of a microfiber. We present the design, fabrication and proof of concept of our device, as well as its multiplexing and tunability perspectives [1] .
Normal faulting at convergent plate boundaries: Mylonitic extensional fabrics in the Franciscan subduction complex in Del Puerto Canyon, California, …
2004
[1] Using a strain and rotation analysis we tested the hypotheses that top-east mylonitic extensional structures in the uppermost Franciscan subduction complex in Del Puerto Canyon, California, accomplished exhumation of the Franciscan blueschists. We found no evidence of strongly noncoaxial deformation, instead our data indicate overall coaxial deformation in the proposed zone of mylonitic extensional deformation. There are no extensional strains, moderate vertical shortening occurred without horizontal extension and was compensated by modest deformation-related volume loss. There is also no strain gradient toward and within the proposed shear zone. Therefore the results of our work indica…
Variational approach to the mechanics of metal V-belt systems
2005
The mechanical behaviour of metal V-belt drives is strongly dependent on the elastic properties of both the belt and the pulley, which influence the belt penetration into the groove and the sliding on the pulley wall. The distribution of tension and penetration is quite different from the rubber belts, which may be dealt with in the assumption of perfectly rigid pulleys. The restoring effect of the centrifugal forces of the plate elements has also to be taken into account. The present analysis considers the combination of all those effects, choosing a three parameter deformation function to describe the plate bending and applying the principle of virtual work for the calculation of the unkn…
Priority Based Coordinated Electric Vehicle Charging System for Heterogeneous Traffic
2020
Despite the environmental and health merits associated with Electric vehicles (EVs), a massive deployment of EVs tends to create new technical and economic challenges for power systems. This is being addressed with different coordinated charging schemes where the charging coordination is distributed across multiple EVs and/or aggregators based on different objectives. This work analyzes an algorithm which maximize the operational profit of a charging station with a high charging station utilization while adhering all the constraints enforced by the utility grid. And it is analyzed the performance of the coordinated charging scheme which facilitates heterogeneous EV users whose arrival is un…
Influence of packaging on the aroma stability of strawberry syrup during shelf life
2001
Different types of packaging (glass bottle, PVC, and PET) were compared for the preservation of aroma quality of a strawberry syrup during shelf life. Esters, alcohols, and aldehydes were analyzed by solid-phase micro-extraction (SPME) and solvent extraction. During storage, hydrolysis of esters in acids and alcohols led to a modification of the aroma profile which can be explained by the replacement of “fruity” and “fresh” notes by “dairy note” in the syrup. Aroma compounds that are responsible for fruity notes, such as methyl cinnamate, methyl anthranilate, and methyl dihydrojasmonate, were strongly reduced after 90 days. This could be explained by a selective interaction of these compoun…