Impact of Temperature and Discharge Rate on the Aging of a LiCoO2/LiNi0.8Co0.15Al0.05O2Lithium-Ion Pouch Cell

Wu, Yao; Keil, Peter; Schuster, Simon F.; Jossen, Andreas

doi:10.1149/2.0401707jes

Cited by 82 publications

(42 citation statements)

References 74 publications

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“…Meanwhile, the proposed adaptive PMS can reduce the average charging and discharging powers, and the time at low SOC operation of TCS by 21.9% to 30.1%, 16.9% to 26.2%, and 85.7% to 90.9%, respectively. Since the battery capacity deteriorates with charging/discharging rates [41,42], the battery life is possible to be increased by reducing average charging/discharging powers. Meanwhile, the battery efficiencies can be increased by reducing the time of low SOC operation which leads to larger internal resistance as shown in Figure 9.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

Design of an Adaptive Power Management Strategy for Range Extended Electric Vehicles

Guan

Chen

2019

Energies

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The cruising distance of the range extended electric vehicle (REEV) can be further extended using a range extender, which consists of an engine and a generator, i.e., a genset. An adaptive power management strategy (PMS) based on the equivalent fuel consumption minimization strategy (ECMS) is proposed for the REEV in this paper. The desired trajectory of the state of charge (SOC) is designed based on the energy-to-distance ratio, which is defined as the difference between the initial SOC and the minimum allowable SOC divided by the remaining travel distance, for discharging the battery. A self-organizing fuzzy controller (SOFC) with SOC feedback is utilized to modify the equivalence factor, which is defined as the fuel consumption rate per unit of electric power, for tracking the desired SOC trajectory. An instantaneous cost function, that consists of the fuel consumption rate of the genset and the equivalent fuel consumption rate of the battery, is minimized to find the optimum power distribution for the genset and the battery. Dynamic programming, which is a global minimization method, is employed to obtain the performance upper bound for the target REEV. Simulation results show that the proposed algorithm is adaptive for different driving cycles and can effectively increase the fuel economy of the thermostat control strategy (TCS) by 11.1% to 16%. The proposed algorithm can also reduce average charging/discharging powers and low SOC operations for possibly extending the battery life and increasing the battery efficiency, respectively. An experiment of the prototype REEV on a chassis dynamometer is set up with the proposed algorithm implemented on a real-time controller. Experiment results show that the proposed algorithm can increase the fuel economy of the TCS by 7.8% for the tested driving cycle. In addition, the proposed algorithm can reduce the average charge/discharge powers of TCS by 7.9% and 11.7%, respectively.

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Section: Simulation and Experimental Resultsmentioning

confidence: 99%

Design of an Adaptive Power Management Strategy for Range Extended Electric Vehicles

Guan

Chen

2019

Energies

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“…It is shown that the reversible capacity decreases with cycling, while the degradation rate follows the order of cell A > cell B > cell C. It is interesting that the capacity degradation is more severe under the condition of low discharge rate, not the widely accepted high discharge rate. Many researchers hold the view that capacity degradation accelerates as the discharge rate increases . High temperature caused by high discharge rate can induce cracks in SEI film, thus accelerate the side reaction with the consumption of recyclable lithium.…”

Section: Resultsmentioning

confidence: 99%

“…Many researchers hold the view that capacity degradation accelerates as the discharge rate increases. 18,37,38 High temperature caused by high discharge rate can induce cracks in SEI film, thus accelerate the side reaction with the consumption of recyclable lithium. However, the capacity degradation behavior shown in this study reveals that low discharge rate during the low-temperature cycling could aggravate the performance degradation.…”

Section: Capacity Fadementioning

confidence: 99%

“…Besides poor performance, the aging rate of LIBs will be accelerated during cycling conditions at low temperature especially below 0°C, which will limit their long‐term use in cold regions . Many previous studies have been devoted to study the low‐temperature cycling performance and deduced degradation mechanisms of LIBs with variations in factors, such as temperature, cycling rate, cell chemistry, and format . It has been found that under low‐temperature condition, lithium plating was highly responsible for the performance degradation of LIBs .…”

Section: Introductionmentioning

confidence: 99%

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Low‐temperature reversible capacity loss and aging mechanism in lithium‐ion batteries for different discharge profiles

Qiu

et al. 2018

Int J Energy Res

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Summary In this paper, reversible capacity loss of lithium‐ion batteries that cycled with different discharge profiles (0.5, 1, and 2 C) is investigated at low temperature (−10°C). The results show that the capacity and power degradation is more severe under the condition of low discharge rate, not the widely accepted high discharge rate. To shed some light on the aging phenomena, noninvasive electrochemical methods, ie, incremental capacity and differential voltage analysis, are applied to identify and quantify the effects of different degradation modes (DMs). Apart from the resistance increase, the DMs include the loss of lithium inventory (LLI) and the loss of active material (LAM). Both LLI and LAM decay to a greater extent for the cell cycled with lower discharge rate, and the growth of LAM is higher than that of LLI. Further, the analysis of state of charge (SOC) window shows that the earlier cutoff of the high discharge rate can lead to less mechanical and thermal stress on cathode materials, thus a lower degradation rate. Another cause is that the lithium plating on the anode materials can be mitigated by increasing the charging temperature which results from preceding high rate discharging.

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“…But when the film thickness increases, the resistance to the migration of Li-ions increases [19,20]. Studies [21][22][23][24][25] demonstrated that during charging/discharge cycling, the growth of SEI film increases the impedance of the batteries. The high impedance results in high internal heat accumulation, which in turn promotes the growth of the SEI film [26,27].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvements of Cobalt Oxide Cathodes for Rechargeable Lithium Batteries

Tian

Zhang

et al. 2018

ChemBioEng Reviews

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Lithium‐ion batteries are essential mobile power sources for portable devices and energy supplies. Among the various cathode materials, cobalt oxides are the most important materials used in lithium‐ion batteries. But the intrinsic drawbacks of cobalt oxides restrict their wide application. In this paper, we present an overview of current approaches to improve the electrochemical performance of the cathode materials, as well as the capacity and cycling capability of the lithium‐ion batteries.

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Impact of Temperature and Discharge Rate on the Aging of a LiCoO₂/LiNi_0.8Co_0.15Al_0.05O₂Lithium-Ion Pouch Cell

Cited by 82 publications

References 74 publications

Design of an Adaptive Power Management Strategy for Range Extended Electric Vehicles

Design of an Adaptive Power Management Strategy for Range Extended Electric Vehicles

Low‐temperature reversible capacity loss and aging mechanism in lithium‐ion batteries for different discharge profiles

Performance Improvements of Cobalt Oxide Cathodes for Rechargeable Lithium Batteries

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