A study on time-dependent low temperature power performance of a lithium-ion battery

Cho, Hyung-Man; Choi, Woosung; Go, Joo-Young; Bae, Sang-Eun; Shin, Heon‐Cheol

doi:10.1016/j.jpowsour.2011.09.111

Cited by 108 publications

(53 citation statements)

References 36 publications

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“…The properties of lithium ion cells, such as impedance and capacity, depend strongly on variables such as operating temperature, state of charge (SOC), the current rate and the relaxation time [7][8][9]. Lithium ion batteries require organic electrolytes due to the wide operating voltage of the cell [10].…”

Section: Introductionmentioning

confidence: 99%

Large format lithium ion pouch cell full thermal characterisation for improved electric vehicle thermal management

Grandjean

Barai

Hosseinzadeh

et al. 2017

Journal of Power Sources

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A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription.  Gradients across the cell thickness can be larger than across the cell surface. Similar heat distribution between charge and discharge scenarios. Self heating increases available capacity at low temperatures *Highlights (for review) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 AbstractIt is crucial to maintain temperature homogeneity in lithium ion batteries in order to prevent adverse voltage distributions and differential ageing within the cell. As such, the thermal behaviour of a large-format 20 Ah lithium iron phosphate pouch cell is investigated over a wide range of ambient temperatures and C rates during both charging and discharging. Whilst previous studies have only considered one surface, this article presents experimental results, which characterise both surfaces of the cell exposed to similar thermal media and boundary conditions, allowing for thermal gradients in-plane and perpendicular to the stack to be quantified. Temperature gradients, caused by self-heating, are found to increase with increasing C rate and decreasing temperature to such an extent that 13.4 ± 0.7% capacity can be extracted using a 10C discharge compared to a 0.5C discharge, both at -10°C ambient temperature. The former condition causes a 18.8 ± 1.1˚C in plane gradient and a 19.7 ± 0.8˚C thermal gradient perpendicular to the stack, which results in large current density distributions and local state of charge differences within the cell. The implications of these thermal and electrical inhomogeneities on ageing and battery pack design for the automotive industry are discussed.

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Section: Introductionmentioning

confidence: 99%

Large format lithium ion pouch cell full thermal characterisation for improved electric vehicle thermal management

Grandjean

Barai

Hosseinzadeh

et al. 2017

Journal of Power Sources

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“…[23][24][25][26][27] Among them, the 18650 cylindrical battery using LFP-2 as cathode exhibits better lowtemperature electrochemical performance, whose discharge capacities at 0, −20 and −40…”

Section: Electrochemical Performances Of Lifepomentioning

confidence: 99%

Synthesis and Electrochemical Performance of LiFePO₄/C Composite by Improved Solid-State Method Using a Complex Carbon Source

Xing

Liang

et al. 2017

J. Electrochem. Soc.

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A high-performance LiFePO 4 /C composite was synthesized by improved solid-state method using starch and PEG6000 as a complex carbon source. The raw materials were mixed by wet-mixing method using de-ionized water as medium. For comparison, a LiFePO 4 /C composite was prepared using PEG6000 as single carbon source. XRD results show that the sample prepared by improved solid-state method has ordered olivine structure and high purity due to the perfect mixing of the raw materials by wet-mixing method. Fine particles with an average particle size about 400 nm are examined by scanning electron microscopy (SEM). TEM observation illustrates that the complex carbon source leads to the homogeneous and complete carbon coating on LiFePO 4 particle surface, resulting in its uniform particle size distribution and enhanced electronic conductivity. All the above factors lead to the better room-temperature and low-temperature electrochemical performances of LiFePO 4 /C composite synthesized by improved solid-state method in both LiFePO 4 /Li half-cell and 18650 cylindrical full-cell. LiFePO 4 has been considered to be the preferred cathode material for electric vehicle battery due to its excellent properties, including high theoretical capacity, good cycling and thermal stability, environmental friendliness, 1-5 which are largely dependent on the synthesis methods. Up to now, the synthesis methods of LiFePO 4 can be roughly divided into solid-state method and liquid phase method, 6-10 and the former is considered to be most suitable for large-scale industrial production. However, the raw materials in solid-state method are generally mixed by solid-state mixing method with many disadvantages, such as long mixing time, mixing inequality and power-wasting, thus leading to impurity phase and uncontrollable particle size, which result in the worse electrochemical performance.11,12 But the wet-mixing method can make the raw materials mix in molecular-level, thus leading to sufficient reaction of raw materials and uniform carbon coating on LiFePO 4 particles, which result in fine particle size and excellent electrochemical performance. Currently, many researchers have synthesized LiFePO 4 materials by solid-state method using wet-mixing via adding a large number of volatile organic compounds to obtain good mixing effect at the cost of serious pollution and high cost. 13,14 Although the operation is simple and the cost is low when using water as medium, there must be a drying process, thus leading to bad mixing effect due to different density and solubility of various components, which results in the stratification and precipitation of components during drying process. Therefore, the wet-mixing method should be improved in order to achieve its application in industrial production.In this paper, the high-performance LiFePO 4 cathode materials were synthesized by improved solid-state method using starch and PEG6000 (polyethylene glycol, average molecular weight 6000) as a complex carbon source. The raw materials were mixed by wetmixing ...

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“…As the mass transfer of charged carrier has a strong negative correlation with temperature, increases in the resistance of LIB at low temperatures have been reported in the literature. 22,23 Thus, in order to distinguish each response of elemental steps in an LIB reaction, an expansion of the impedance of LIB was examined by lowering the temperature. Ac impedance spectra acquired under the temperature range between −20 o C and 20 o C were compared and analyzed.…”

Section: Evaluation Technique For Eismentioning

confidence: 99%

New Analysis of Electrochemical Impedance Spectroscopy for Lithium-ion Batteries

Osaka¹,

Nara²,

Mukoyama³

et al. 2013

Journal of Electrochemical Science and Technology

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ABSTRACT:First of all, we express our deepest sympathies for the passing of Professor Su-Moon Park. In the present paper, an electrochemical impedance spectroscopy (EIS), which Professor Su-Moon Park also used frequently for the investigation of electroconducting polymer, is introduced as a recent evaluation tool for a commercially available lithium-ion battery (LIB). The paper surveys how to design equivalent circuits while explaining physical and chemical phenomena in the LIB and how to get more accurate impedance spectra with varying the measuring temperatures. Additionally, a square current EIS (SC-EIS) technique, which we have suggested, is introduced for the larger LIB system as a promising technique for the future.

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A study on time-dependent low temperature power performance of a lithium-ion battery

Cited by 108 publications

References 36 publications

Large format lithium ion pouch cell full thermal characterisation for improved electric vehicle thermal management

Large format lithium ion pouch cell full thermal characterisation for improved electric vehicle thermal management

Synthesis and Electrochemical Performance of LiFePO₄/C Composite by Improved Solid-State Method Using a Complex Carbon Source

New Analysis of Electrochemical Impedance Spectroscopy for Lithium-ion Batteries

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A study on time-dependent low temperature power performance of a lithium-ion battery

Cited by 108 publications

References 36 publications

Large format lithium ion pouch cell full thermal characterisation for improved electric vehicle thermal management

Large format lithium ion pouch cell full thermal characterisation for improved electric vehicle thermal management

Synthesis and Electrochemical Performance of LiFePO4/C Composite by Improved Solid-State Method Using a Complex Carbon Source

New Analysis of Electrochemical Impedance Spectroscopy for Lithium-ion Batteries

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Synthesis and Electrochemical Performance of LiFePO₄/C Composite by Improved Solid-State Method Using a Complex Carbon Source