Browse Topic: Wireless charging
A mobile wireless charger is a device that charge a smartphone or other compatible gadgets without the need for physical cables. Principle of wireless mobile charger system based on inductive coupling phenomena. The main objective of this paper aims to address the challenge of packaging wireless mobile charger in peculiar door trim profile keeping overall functionality and aesthetic appearance of door trim intact. This paper deals with integration of a wireless charging system within the door trim of a vehicle to provide convenience and advanced functionality. The objective is to pack a wireless charger in door trim meeting the ergonomic target and equilibrium state stability while maintaining sleek and minimalist design of the door trim. The study focuses on innovative packaging solutions related to space optimization in door despite multiple challenges involved. Major challenge lies in packing the unit amidst complex mechanisms such as window regulators, speakers, structural
A research team led by Prof. Jinho Chang from the department of electrical engineering and computer science at DGIST has developed an ultrasound-based wireless charging technology capable of rapidly and efficiently charging the batteries of implantable medical devices. The technology has achieved world-class energy efficiency, fully charging a commercial battery within two hours, even inside the human body.
As the United States Army explores electrified tactical vehicles, wireless power transfer (WPT) has emerged as a promising recharging method. WPT allows multiple vehicles to recharge while in proximity of a charging station based on a mobile platform. This study examines the requirements of WPT by analyzing geo-location data from over 400 tactical vehicles at the National Training Center. The data was extracted, cleaned, and analyzed to identify periods when vehicles were close enough for effective WPT. The analysis quantifies the amount of time vehicles spend in proximity and their average distance apart, both while stationary and moving, to establish initial WPT requirements. These results were combined with energy consumption rates to estimate the power throughput of a WPT system. Vehicles were found to be stationary and close to other vehicles for most of the day, making WPT a practical solution in those situations. Although the analysis found that WPT is feasible during convoys
The SAE J2954 standard establishes an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless power transfer (WPT) of light-duty plug-in electric vehicles. The specification defines three charging levels up to 11 kVA and in future revisions up to 22 kVA. A standard for WPT based on these charge levels enables selection of a charging rate based on vehicle requirements, thus allowing for better vehicle packaging and ease of customer use. This is meant to be used in conjunction with communications standard SAE J2847/6 and use cases J2836/6 and ground assembly WPT Certification UL 2750. The specification supports home (private) charging and public wireless charging. In the near term, vehicles that are able to be charged wirelessly under SAE J2954 should also be able to be charged conductively by SAE J1772 plug-in chargers. This standard addresses stationary light-duty
To shape future mobility MAHLE has committed itself to foster wireless charging for electrical vehicles. The standardized wireless power transfer of 11 kW at a voltage level of 800 V significantly improves the end user experience for charging an electric vehicle without the need to handle a connector and cable anymore. Combined with automated parking and autonomous driving systems, the challenge to charge fleets without user interaction is solved. Wireless charging is based on inductive power transfer. In the ground assembly’s (GA) power transfer coil, a magnetic field is generated which induces a voltage in the vehicle assembly (VA) power transfer coil. To transfer the power from grid to battery with a high efficiency up to 92% the power transfer coils are compensated with resonant circuits. In this paper the Differential-Inductive-Positioning-System (DIPS) to align a vehicle on the GA for parking will be presented. This system utilizes five standardized magnetic fields which are
Daegu Gyeongbuk Institute of Science and Technology Daegu, Republic of Korea
A team of researchers at the University of Missouri have made a significant breakthrough in their ongoing development of an on-skin wearable bioelectronic device. Zheng Yan’s lab, which specializes in soft bioelectronics, recently added an important component to the team’s existing ultrasoft, breathable and stretchable material. The key feature: wireless charging — without batteries — through a magnetic connection.
This SAE Recommended Practice establishes the communication for the variety of potential functions for plug-in electric vehicle (PEV) customers. This includes features for use case items in SAE J2836/3 that may be PEV/customer optional equipment, such as AC vehicle-to-load (V2L) and AC vehicle-to-vehicle systems. These systems conform to SAE J1772 with variations required to identify to the PEV bidirectional onboard charger (OBC) the mode of operation changes and output requirements. SAE has published multiple documents relating to PEV and vehicle-to-grid (V2G) interfaces. The various document series are listed below, with a brief explanation of each. Figure 1 shows the sequencing of these documents and their primary function (e.g., the SAE J2836 and SAE J2847/1 documents start with smart charging, SAE J2836 and SAE J2847/2 then adds DC charging, etc.). The intent is to have subsequent slash sheets complement each other as more functions and features are included. The /6 series of
Volkswagen announced recently that its three-year-old Innovation Hub in Knoxville, Tenn., is making major gains in lightweighting, EV wireless charging and sustainable interior materials. Volkswagen's Innovation Hub specializes in applied materials science and frequently collaborates with neighbors the University of Tennessee and Oak Ridge National Lab. “We are accelerating innovation with electric vehicles and contributing more to sustainable transportation in America by focusing our efforts on some of the most transformative automotive research being done in the country,” said Pablo Di SI, president and CEO of Volkswagen Group of America, in a release. He said that the research partnerships are a “unique blend of world-class academic research and Volkswagen's leading industry capabilities.”
The published SAE J2954 standard established an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless power transfer (WPT) for light-duty plug-in electric vehicles. This SAE Information Report, SAE J2954/2, defines new power transfer levels in the higher power ranges needed for heavy-duty electric vehicles. This document addresses the requirements based on these charge levels and different vehicle applications as a first step in the process of completing a standard that the industry can use, both for private (fleet) and public wireless power transfer, including for charging electric vehicle batteries. This document is the first step in a process towards HD static and dynamic WPT. This document lacks specific requirements and solutions, for which field data is needed. This document is not intended to be a guideline to enable manufacturers to design systems with minimal
The SAE J2954 standard establishes an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless power transfer (WPT) of light-duty plug-in electric vehicles. The specification defines various charging levels that are based on the levels defined for SAE J1772 conductive AC charge levels 1, 2, and 3, with some variations. A standard for WPT based on these charge levels enables selection of a charging rate based on vehicle requirements, thus allowing for better vehicle packaging and ease of customer use. The specification supports home (private) charging and public wireless charging. In the near term, vehicles that are able to be charged wirelessly under SAE J2954 should also be able to be charged conductively by SAE J1772 plug-in chargers. SAE J2954 addresses unidirectional charging, from grid to vehicle; bidirectional energy transfer may be evaluated for a future standard
Researchers have developed a system to safely deliver electricity over the air, potentially turning entire buildings into wireless charging zones. The technology can deliver 50 watts of power using magnetic fields.
Although wireless charging pads already exist for smartphones, they only work if the phone is sitting still. For cars, that would be just as inconvenient as the current practice of plugging them in for an hour or two at charging stations.
WiBotic — a maker of wireless charging and fleet energy management solutions for aerial, mobile, marine, and industrial robots — partnered with Astrobotic, Bosch, and the University of Washington to develop and commercialize wireless charging solutions for robots on the Moon.
This SAE Information Report SAE J2836/6 establishes use cases for communication between plug-in electric vehicles and the EVSE for wireless energy transfer as specified in SAE J2954. It addresses the requirements for communications between the on-board charging system and the wireless EV supply equipment (WEVSE) in support of detection of the WEVSE, the charging process, and monitoring of the charging process. Since the communication to the charging infrastructure and the power grid for smart charging will also be communicated by the WEVSE to the EV over the wireless interface, these requirements are also covered. However, the processes and procedures are expected to be identical to those specified for V2G communications specified in SAE J2836/1. Where relevant, the specification notes interactions that may be required between the vehicle and vehicle operator, but does not formally specify them. Similarly, communications between the on-board charging sub-system and the on-board vehicle
SAE International on October 22, 2020 announced publication of the first global standard that specifies, in a single document, both the electric vehicle (EV) and EV supply equipment (EVSE) ground system requirements for wireless charging of electric vehicles. The new standard, SAE J2954, helps pave the way for charging without the need for plugging in — widely considered to be a key enabler for accelerating the adoption of EVs and autonomous vehicles.
The SAE J2954 standard establishes an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless power transfer (WPT) of light-duty plug-in electric vehicles. The specification defines various charging levels that are based on the levels defined for SAE J1772 conductive AC charge levels 1, 2, and 3, with some variations. A standard for WPT based on these charge levels enables selection of a charging rate based on vehicle requirements, thus allowing for better vehicle packaging and ease of customer use. The specification supports home (private) charging and public wireless charging. In the near term, vehicles that are able to be charged wirelessly under SAE J2954 should also be able to be charged conductively by SAE J1772 plug-in chargers. SAE J2954 addresses unidirectional charging, from grid to vehicle; bidirectional energy transfer may be evaluated for a future standard
Currently, there are no specific standards on electromagnetic compatibility (EMC) test for wireless charging system of electric vehicles (EVs). However, the EMC test items have been summarized in some international standards. And the national standard is under developing. In order to support the formulation of corresponding national standards and regulations, promote the rapid development of EVs industry and support the implementation of the national strategy of new energy vehicles (NEVs) and intelligent network vehicle, we carry out the EMC test for wireless charging systems. In this paper, the wireless charging system of EVs is taken as the research object, which can also been called equipment under test (EUT). Firstly, an introduction of the research status was summarized. And then, the influence parameters such as output power and offset are analyzed. Based on the analysis, the EMC test was implemented to evaluate the EMC performance of EUT. Finally, the relevant research results
The Recommended Practice SAE J2954 establishes an industry-wide specification that defines acceptable criteria for interoperability, electromagnetic compatibility, EMF, minimum performance, safety, and testing for wireless charging of light-duty electric and plug-in electric vehicles. The specification defines various charging levels that are based on the levels defined for SAE J1772 conductive AC charge levels 1, 2, and 3, with some variations. A standard for wireless power transfer (WPT) based on these charge levels enables selection of a charging rate based on vehicle requirements, thus allowing for better vehicle packaging and ease of customer use. The specification supports home (private) charging and public wireless charging. In the near term, vehicles that are able to be charged wirelessly under Recommended Practice SAE J2954 should also be able to be charged by SAE J1772 plug-in chargers. This Recommended Practice is planned to be standardized after the 2018 timeframe after
In this study, we present an intelligent and wireless subsystem for powering and communicating with three sets of seat belt buckle sensors that are each installed on removable and interchangeable automobile seating. As automobile intelligence systems advance, a logical step is for the driver’s dashboard to display seat belt buckle indicators for rear seating in addition to the front seating. The problem encountered is that removable and interchangeable automobile seating outfitted with wired power and data links are inherently less reliable than rigidly fixed seating, as there is a risk of damage to the detachable power and data connectors throughout end-user seating removal/re-installation cycles. The present study tackles this issue through outfitting three removable and interchangeable rear seat assemblies with resonant capacitive coupling wireless power transfer as to power each rear seat across a variable gap between the interior paneling and that side of the seat closest to the
Wireless charging of Electric Vehicle adhere the mutual induction to transmit power to the battery and eliminates need of wire and physical connection. Power pad design, frequency of power transfer, distance between transfer coils and alignment of transfer coils are critical challenges of EV wireless charging. Power pad design entails optimization of coil shape and size, core shape, and material of coil and core along with economic analysis. The manuscript compares the already available coil shapes, with the introduction of ferrite core across the coils to design an extremely efficient power pad for the wireless charging of EV. A 3D finite element method (FEA) is being used for analysis, due to the unconventional distribution of the flux. Only three types of coils, D, DD, and DDQ, are taken to analyze the effect of magnetic ferrite core. The comparison is made based on simulation results, magnetic flux pattern as well as data imported from the results. Ansys 3D Maxwell simulation
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