The Effect of Pulse Charging on Commercial Lithium Cobalt Oxide (LCO) Battery Characteristics

Kannan, D.

doi:10.20964/2021.04.30

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…The impact of the variation of pulse frequencies while charging the Li cell on its lifetime is extensively studied in [9,10]. The effects of PCC on the performance parameters, such as charging speed and impedance analysis, of Li-ion batteries are also equally important [11,12], and this performance evaluation also includes the study of electrochemical impedance spectrographs (EISs) for Li-ion cells [13,14]. Particularly in the impedance spectrographs shown in Figure 1, the radius of the semicircle in the medium-frequency range is crucial, as it signifies the variation in the charge transfer resistance of the cell.…”

Section: Introductionmentioning

confidence: 99%

Comparison of EV Fast Charging Protocols and Impact of Sinusoidal Half-Wave Fast Charging Methods on Lithium-Ion Cells

Althurthi,

Rajashekara,

Debnath

2024

WEVJ

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In electric vehicle fast charging systems, it is important to minimize the effect of fast charging on the grid and it is also important to operate the charging system at high efficiencies. In order to achieve these objectives, in this paper, a sinusoidal half-wave DC current charging protocol and a sinusoidal half-wave pulsed current charging protocol are proposed for the fast charging of Li-ion batteries. A detailed procedure is presented for implementing the following proposed methods: (a) a pre-defined half-sine wave current function and (b) a pulsed half-sine wave current method. Unlike the conventional full-wave sinusoidal ripple current charging protocols, the proposed study does not utilize any sinusoidal full-wave ripple. The performance of these new charging methods on Ni-Co-Al-type Li-cells is studied and compared with the existing constant current and positive pulsed current charging protocols, which have been discussed in the existing literature. In addition, the changes in the electrochemical impedance spectrograph of each cell are examined to study the effects of the applied charging methods on the internal resistance of the Li cell. Finally, the test results are presented for 250 life cycles of charging at 2C (C: charging rate) and the degradation in cell capacities are compared among the four different methods for the Ni-Co-Al-type Li cell.

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Section: Introductionmentioning

confidence: 99%

Comparison of EV Fast Charging Protocols and Impact of Sinusoidal Half-Wave Fast Charging Methods on Lithium-Ion Cells

Althurthi,

Rajashekara,

Debnath

2024

WEVJ

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“…Advanced charging protocols, e.g., pulse current (PC) charging, hold the potential to prolong the service life of current LIBs. [6,7] Specifically, PC charging with relaxation has been extensively employed in electrochemical testing of NMC/Graphite, [8][9][10] LiFePO 4 (LFP)/Carbon-based, [11,12] LiCoO 2 (LCO)/Graphite, [13] and LFP/Li [14] batteries from lab cells to commercial batteries. A typical PC charging protocol consists of a constant current (CC) charging step followed by a relaxation period., and the durations of the charging and following relaxation periods vary depending on the experimental design.…”

Section: Introductionmentioning

confidence: 99%

Unravelling the Mechanism of Pulse Current Charging for Enhancing the Stability of Commercial LiNi_0.5Mn_0.3Co_0.2O₂/Graphite Lithium‐Ion Batteries

Guo,

Xu,

Exner

et al. 2024

Advanced Energy Materials

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The key to advancing lithium‐ion battery (LIB) technology, particularly with respect to the optimization of cycling protocols, is to obtain comprehensive and in‐depth understanding of the dynamic electrochemical processes during battery operation. This work shows that pulse current (PC) charging substantially enhances the cycle stability of commercial LiNi0.5Mn0.3Co0.2O2 (NMC532)/graphite LIBs. Electrochemical diagnosis unveils that pulsed current effectively mitigates the rise of battery impedance and minimizes the loss of electrode materials. Operando and ex situ Raman and X‐ray absorption spectroscopy reveal the chemical and structural changes of the negative and positive electrode materials during PC and constant current (CC) charging. Specifically, Li‐ions are more uniformly intercalated into graphite and the Ni element of NMC532 achieves a higher energy state with less Ni─O bond length variation under PC charging. Besides, PC charging suppresses the electrolyte decomposition and continuous thickening of the solid‐electrolyte‐interphase (SEI) layer on graphite anode. These findings offer mechanistic insights into Li‐ion storage in graphite and NMC532 and, more importantly, the role of PC charging in enhancing the battery cycling stability, which will be beneficial for advancing the cycling protocols for future LIBs and beyond.

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The design of fast charging strategy for lithium-ion batteries and intelligent application: A comprehensive review

Ji,

He,

et al. 2025

Applied Energy

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The Effect of Pulse Charging on Commercial Lithium Cobalt Oxide (LCO) Battery Characteristics

Cited by 4 publications

References 26 publications

Comparison of EV Fast Charging Protocols and Impact of Sinusoidal Half-Wave Fast Charging Methods on Lithium-Ion Cells

Comparison of EV Fast Charging Protocols and Impact of Sinusoidal Half-Wave Fast Charging Methods on Lithium-Ion Cells

Unravelling the Mechanism of Pulse Current Charging for Enhancing the Stability of Commercial LiNi_0.5Mn_0.3Co_0.2O₂/Graphite Lithium‐Ion Batteries

The design of fast charging strategy for lithium-ion batteries and intelligent application: A comprehensive review

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The Effect of Pulse Charging on Commercial Lithium Cobalt Oxide (LCO) Battery Characteristics

Cited by 4 publications

References 26 publications

Comparison of EV Fast Charging Protocols and Impact of Sinusoidal Half-Wave Fast Charging Methods on Lithium-Ion Cells

Comparison of EV Fast Charging Protocols and Impact of Sinusoidal Half-Wave Fast Charging Methods on Lithium-Ion Cells

Unravelling the Mechanism of Pulse Current Charging for Enhancing the Stability of Commercial LiNi0.5Mn0.3Co0.2O2/Graphite Lithium‐Ion Batteries

The design of fast charging strategy for lithium-ion batteries and intelligent application: A comprehensive review

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Product

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Unravelling the Mechanism of Pulse Current Charging for Enhancing the Stability of Commercial LiNi_0.5Mn_0.3Co_0.2O₂/Graphite Lithium‐Ion Batteries