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相关概念视频

Charging Conductors By Induction01:15

Charging Conductors By Induction

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The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
8.2K
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

28.0K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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DC Battery01:21

DC Battery

868
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
868
Charge and Current01:14

Charge and Current

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Electric charge is the most fundamental quantity in an electric circuit. The effects of electric charge are encountered daily, such as when a wool sweater sticks to the human body or when a person receives a shock while walking on a carpet.
Charge is an inherent property of the atomic particles that make up matter and is measured in units called coulombs (C). Matter is composed of atoms, each consisting of electrons, protons, and neutrons. Electrons have a negative charge (-e), while protons...
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Electromotive Force01:02

Electromotive Force

4.7K
Electromotive force (emf) is the force that causes current to flow from a higher to a lower  potential. The term "electromotive force" is used for historical reasons, even though emf is not a force at all.
Any circuit with a constant current must contain an emf-producing source. Examples of emf sources include batteries, electric generators, solar cells, thermocouples, and fuel cells. All these sources transform energy of some kind (mechanical, chemical, thermal, and so on)...
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Faraday Disk Dynamo01:23

Faraday Disk Dynamo

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A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
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相关实验视频

Updated: Sep 11, 2025

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
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EVMCSDLT:使用分布式账本技术的电动汽车移动充电系统.

Neha Deshmukh1, Vaishali Khairnar1, Deepali Vora2

  • 1Terna Engineering College, University of Mumbai, Nerul, Navi Mumbai, 400706, Maharashtra, India.

MethodsX
|August 18, 2025
PubMed
概括

本研究介绍了EVMCSDLT,这是一个安全的支付框架,用于在没有互联网的地区为电动汽车 (EV) 充电. 它使用区块链和QR代码进行离线交易,提高EV基础设施的可访问性.

关键词:
区块链 区块链 区块链 区块链分布式账本技术分布式账本技术电动汽车 电动汽车是什么移动充电是指手机充电.线下支付是线下支付,而非线下支付是线下支付.安全的安全的安全的安全的安全.

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相关实验视频

Last Updated: Sep 11, 2025

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
09:49

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery

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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells
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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

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科学领域:

  • 计算机科学 计算机科学
  • 电气工程 电气工程
  • 区块链技术 区块链技术

背景情况:

  • 越来越多的电动汽车 (EV) 需要强大的充电基础设施.
  • 某些地区的互联网连接有限,这对安全的电动汽车充电支付构成了挑战.
  • 现有的支付系统通常依赖于连续的互联网接入,限制了可用性.

研究的目的:

  • 引入EVMCSDLT,这是一个用于在线环境中安全的电动汽车充电交易的新型支付框架.
  • 利用分布式账本技术 (DLT) 和区块链来提高安全性和可访问性.
  • 为了使可靠的电动汽车充电支付独立于互联网连接.

主要方法:

  • 开发了使用分布式账本技术 (DLT) 的支付框架EVMCSDLT.
  • 实施了两部分区块链安全机制,其中包括QR码认证和散列.
  • 集成React.js与Web3和MetaMask进行在线/离线交易处理.
  • 利用谷歌地图进行充电站的实时地理空间跟踪.

主要成果:

  • 经过证明可靠的交易范围高达8.13米.
  • 实现了一致的QR码扫描,平均响应时间为3.4秒.
  • 对模拟的中间人网络攻击表现出强大的抵抗力.

结论:

  • 在互联网连接有限的地区,EVMCSDLT确保了安全和可访问的电动汽车充电支付.
  • 该框架提高了交易的安全性和完整性,无论互联网状态如何.
  • 这一进步将电动汽车充电的可访问性扩展到服务不足的地区.