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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

27.6K
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...
27.6K
Potentiometer01:30

Potentiometer

790
Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...
790
Design Example: Automobile Ignition System01:14

Design Example: Automobile Ignition System

245
The automobile's ignition system plays a vital role by ensuring the timely ignition of the fuel-air mixture in each cylinder. This ignition is facilitated by a spark plug, which is composed of two electrodes separated by an air gap. A spark forms across this air gap when a substantial voltage is generated between the electrodes, leading to the ignition of the fuel.
One can generate a large voltage using a car battery of 12 volts with the help of inductors. Inductors are known for opposing...
245
Bus Impedance Matrix01:24

Bus Impedance Matrix

144
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
144

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相关实验视频

Updated: Jul 15, 2025

Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
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Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

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电动汽车离子电池的传感器故障估计方法

Tianyu Lan1, Zhi-Wei Gao1, Haishuang Yin1

  • 1Research Centre for Digitalization and Intelligent Diagnosis to New Energies, College of Electrical and Information Engineering, Northeast Petroleum University, Daqing 163000, China.

Sensors (Basel, Switzerland)
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概括

这项研究引入了一种新的基于电动汽车电池传感器的基于模型的故障诊断方案. 它可以早期检测电压,电流和温度传感器故障,从而提高安全性和可靠性.

关键词:
描述者 观察者 观察者错误诊断 错误诊断 错误诊断 是一个问题.错误估计错误估计 错误估计离子电池是一种离子电池.传感器故障传感器故障传感器

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科学领域:

  • 电气工程 电气工程
  • 材料科学 材料科学 材料科学
  • 汽车工程 汽车工程

背景情况:

  • 电动汽车 (EV) 和离子电池 (LIB) 正在迅速发展.
  • 电池的安全性和可靠性是LIBs关心的关键问题.
  • 电池管理系统 (BMS) 依赖于准确的传感器数据以实现最佳性能.

研究的目的:

  • 为LIBs开发经过验证的电热模型.
  • 为电池传感器建立基于模型的故障诊断方案.
  • 为了实现LIBs中传感器故障的早期检测.

主要方法:

  • 使用描述符的比例和衍生观察者系统进行传感器诊断.
  • 使用实验数据开发了LIB的验证电气和热模型.
  • 实现了电压,电流和温度传感器故障的实时估计.

主要成果:

  • 成功模拟了各种故障类型,以验证拟议的诊断方案.
  • 演示了观察员系统能够实时估计传感器故障的能力.
  • 使用实验电池数据验证了基于模型的方法的有效性.

结论:

  • 拟议的基于模型的故障诊断方案有效检测LIB中的传感器故障.
  • 早期故障检测可以提高电池管理系统的安全性和可靠性.
  • 这种方法有助于推进更安全,更可靠的电动汽车.