Nonlinear State-Variable Method for Solving Physics-Based Li-Ion Cell Model with High-Frequency Inputs

2017 ◽  
Vol 164 (11) ◽  
pp. E3001-E3015 ◽  
Author(s):  
Meng Guo ◽  
Xinfang Jin ◽  
Ralph E. White
Keyword(s):  
High Frequency ◽  
Cell Model ◽  
Variable Method ◽  
State Variable ◽  
Li Ion ◽  
Nonlinear State

Determination of voltage distribution on winding of transformer by state variable method

2021 ◽  
Vol 15 (1) ◽  
pp. 85-94
Author(s):  
Thanh Bao Doan ◽  
◽  
Quoc Vu Pham ◽  
Trung Duy Pham ◽  
◽  
...  
Keyword(s):  
High Frequency ◽  
Voltage Distribution ◽  
Voltage Fluctuations ◽  
State Variable ◽  
Maximum Value ◽  
Lightning Impulse ◽  
Overvoltage Protection ◽  
Negative Impacts ◽  
Transient Overvoltage

A transient overvoltage incident at the transformer terminal generates high-frequency voltage fluctuations that have negative impacts on the transformer. These oscillations may cause damage to the insulation of transformers. These problems are heavy, difficult to restore, and repair. Therefore, overvoltage protection for the transformers is essential. This paper pointed out that the interleaved disk winding has a larger capacitance than that of continuous disk windings. Therefore, the use of interleaved disk winding has the effect of making the voltage distribution on the winding wheels more even and increasing the overvoltage resistance of the transformer. In addition, the value of the voltage at each position of the winding when lightning impulses on the transformer terminal and the voltage distribution on the interleaved disk winding at the time when the lightning impulse has maximum value are also presented in the article. On that basis, the effectiveness of using the interleaved disk winding method in the transformer will be analyzed in detail.

scholarly journals Multiple-Input Single-Output Polynomial Nonlinear State-Space Model of the Li-ion Battery’s Short-term Dynamics

2018 ◽  
Vol 51 (15) ◽  
pp. 497-502
Author(s):  
Rishi Relan ◽  
Koen Tiels ◽  
Jean-Marc Timmermans ◽  
Johan Schoukens
Keyword(s):  
State Space ◽  
State Space Model ◽  
Short Term ◽  
Space Model ◽  
Single Output ◽  
Multiple Input ◽  
Li Ion ◽  
Nonlinear State

scholarly journals Study of a Li-Ion Cell Kinetics in Five Regions to Predict Li Plating Using a Pseudo Two-Dimensional Model

2019 ◽  
Vol 11 (22) ◽  
pp. 6392 ◽  
Author(s):  
Sanaz Momeni Boroujeni ◽  
Kai Peter Birke
Keyword(s):  
Cell Model ◽  
Simulated Data ◽  
Ionic Conductivities ◽  
Life Time ◽  
Einstein Relation ◽  
Side Reactions ◽  
Two Dimensional ◽  
Calculation Results ◽  
Li Ion ◽  
Aging Mechanisms

Detecting or predicting lithium plating in Li-ion cells and subsequently suppressing or preventing it have been the aim of many researches as it directly contributes to the aging, safety, and life-time of the cell. Although abundant influencing parameters on lithium deposition are already known, more information is still needed in order to predict this phenomenon and prevent it in time. It is observed that balancing in a Li-ion cell can play an important role in controlling lithium plating. In this work, five regions are defined with the intention of covering all the zones participating in the charge transfer from one electrode to the other during cell cycling. We employ a pseudo two-dimensional (P2D) cell model including two irreversible side reactions of solid electrolyte interface (SEI) formation and lithium plating (Li-P) as the anode aging mechanisms. With the help of simulated data and the Nernst–Einstein relation, ionic conductivities of the regions are calculated separately. Calculation results show that by aging the cell, more deviation between ionic conductivities of cathode and anode takes place which leads to the start of Li plating.

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