Real-time Battery Cell Voltage Measurement Method Using LC Series Circuit Type Cell Voltage Equalizer

2019 ◽  
Author(s):  
Daiki Satou
Keyword(s):  
Real Time ◽  
Measurement Method ◽  
Cell Voltage ◽  
Voltage Measurement ◽  
Battery Cell

Analog Front-End Circuits Design for Electric Vehicles Battery Cell Voltage Measurement

2020 ◽  
Vol 57 (4) ◽  
pp. 33-41
Author(s):  
Kyuho Kim ◽  
Jinkook Yun ◽  
Ho-Yul Choi ◽  
Donggil Jeong ◽  
Hojeong Jin ◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Cell Voltage ◽  
Voltage Measurement ◽  
Battery Cell ◽  
Front End ◽  
Analog Front End ◽  
Front End Circuits

Real-Time Estimation of Lithium-Ion Concentration in Both Electrodes of a Lithium-Ion Battery Cell Utilizing Electrochemical–Thermal Coupling

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Satadru Dey ◽  
Beshah Ayalew
Keyword(s):  
Real Time ◽  
Unscented Kalman Filter ◽  
Lithium Ion ◽  
Time Estimation ◽  
Li Ion Battery ◽  
Battery Cell ◽  
Thermal Dynamics ◽  
Estimation Scheme ◽  
Real Time Estimation ◽  
Li Ion

This paper proposes and demonstrates an estimation scheme for Li-ion concentrations in both electrodes of a Li-ion battery cell. The well-known observability deficiencies in the two-electrode electrochemical models of Li-ion battery cells are first overcome by extending them with a thermal evolution model. Essentially, coupling of electrochemical–thermal dynamics emerging from the fact that the lithium concentrations contribute to the entropic heat generation is utilized to overcome the observability issue. Then, an estimation scheme comprised of a cascade of a sliding-mode observer and an unscented Kalman filter (UKF) is constructed that exploits the resulting structure of the coupled model. The approach gives new real-time estimation capabilities for two often-sought pieces of information about a battery cell: (1) estimation of cell-capacity and (2) tracking the capacity loss due to degradation mechanisms such as lithium plating. These capabilities are possible since the two-electrode model needs not be reduced further to a single-electrode model by adding Li conservation assumptions, which do not hold with long-term operation. Simulation studies are included for the validation of the proposed scheme. Effect of measurement noise and parametric uncertainties is also included in the simulation results to evaluate the performance of the proposed scheme.

scholarly journals A Cycle Voltage Measurement Method and Application in Grounding Grids Fault Location

Energies ◽  
2017 ◽  
Vol 10 (11) ◽  
pp. 1929 ◽  
Author(s):  
Fan Yang ◽  
Yongan Wang ◽  
Manling Dong ◽  
Xiaokuo Kou ◽  
Degui Yao ◽  
...  
Keyword(s):  
Measurement Method ◽  
Fault Location ◽  
Voltage Measurement ◽  
Grounding Grids

scholarly journals System protection for lithium-ion batteries management system: a review

2019 ◽  
Vol 13 (3) ◽  
pp. 1184 ◽  
Author(s):  
L. Rimon ◽  
Khairul Safuan Muhammad ◽  
S.I. Sulaiman ◽  
AM Omar
Keyword(s):  
Management System ◽  
Short Circuit ◽  
Lithium Ion ◽  
Cell Voltage ◽  
Battery Management System ◽  
Battery Management ◽  
Battery Cell ◽  
Safety Issues ◽  
System Protection ◽  
Faulty Cell

<span>Robustness of a battery management system (BMS) is a crucial issue especially in critical application such as medical or military. Failure of BMS will lead to more serious safety issues such as overheating, overcharging, over discharging, cell unbalance or even fire and explosion. BMS consists of plenty sensitive electronic components and connected directly to battery cell terminal. Consequently, BMS exposed to high voltage potential across the BMS terminal if a faulty cell occurs in a pack of Li-ion battery. Thus, many protection techniques have been proposed since last three decades to protect the BMS from fault such as open cell voltage fault, faulty cell, internal short circuit etc. This paper presents a review of a BMS focuses on the protection technique proposed by previous researcher. The comparison has been carried out based on circuit topology and fault detection technique</span>

Real-Time Measurement Method of Doppler Based on GPS Carrier Signals

2012 ◽  
Vol 226-228 ◽  
pp. 2050-2055 ◽  
Author(s):  
Shao Feng Dong ◽  
Bao Qiang Du ◽  
Wei Zhou
Keyword(s):  
Frequency Shift ◽  
Real Time ◽  
Measurement Method ◽  
Dynamic Range ◽  
Time Synchronization ◽  
Influencing Factor ◽  
Doppler Frequency ◽  
Time Measurement ◽  
Time Frequency ◽  
Real Time Measurement

According to Doppler effect of satellite on the time synchronization technology between satellite and the ground station, a real-time measurement method of Doppler is proposed based on GPS carrier signals. Using Doppler observations from GPS receiver, the method can real-timely measure Doppler frequency shift of GPS including dynamic Doppler and media Doppler whose error can be timely modified in the receiver end. Simulation results show that the frequency shift caused by dynamic Doppler, a main influencing factor in the course of transmission of time-frequency signal by GPS satellite, is between plus or minus several thousands Hz. Comparing to traditional measurement method of Doppler, the method makes it possible to fast track phase of signal in large dynamic range in synchronous technology.

Real-Time Measurement Method for Retardation of Eighth Waveplate Independent of Fast Axis

2011 ◽  
Vol 38 (5) ◽  
pp. 0508002 ◽  
Author(s):  
朱玲琳 Zhu Linglin ◽  
曾爱军 Zeng Aijun ◽  
李凡月 Li Fanyue ◽  
黄惠杰 Huang Huijie
Keyword(s):  
Real Time ◽  
Measurement Method ◽  
Time Measurement ◽  
Fast Axis ◽  
Real Time Measurement

scholarly journals Open-Source Dynamic Matlab/Simulink 1D Proton Exchange Membrane Fuel Cell Model

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3478 ◽  
Author(s):  
Arne L. Lazar ◽  
Swantje C. Konradt ◽  
Hermann Rottengruber
Keyword(s):  
Fuel Cell ◽  
Open Source ◽  
Real Time ◽  
Proton Exchange Membrane ◽  
Cell Model ◽  
Cell Voltage ◽  
Proton Exchange ◽  
Cell Parameters ◽  
Real Time Analysis ◽  
Exchange Membrane

This work presents an open-source, dynamic, 1D, proton exchange membrane fuel cell model suitable for real-time applications. It estimates the cell voltage based on activation, ohmic and concentration overpotentials and considers water transport through the membrane by means of osmosis, diffusion and hydraulic permeation. Simplified equations reduce the computational load to make it viable for real-time analysis, quick parameter studies and usage in complex systems like complete vehicle models. Two modes of operation for use with or without reference polarization curves allow for a flexible application even without information about cell parameters. The program code is written in MATLAB and provided under the terms and conditions of the Creative Commons Attribution License (CC BY). It is designed to be used inside of a Simulink model, which allows this fuel cell model to be used in a wide variety of 1D simulation platforms by exporting the code as C/C++.

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