Thermal hazard evaluation of 18650 lithium-ion batteries at various discharge rates

Lai, Yen-Wen; Chi, Kuang-Hui; Chung, Yi-Hong; Liao, Sheng-Wei; Shu, Chi-Min

doi:10.1016/j.jlp.2024.105323

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Lai et al evaluated the thermal hazard of 18,650 lithium-ion batteries at different discharge rates (1C, 2C, 3C and 4C) [12]. The discharge capacity and discharge energy values were 3.117 Ah and 9.021 Wh during the 4C discharge rate.…”

Section: Introductionmentioning

confidence: 99%

Study on Discharge Characteristic Performance of New Energy Electric Vehicle Batteries in Teaching Experiments of Safety Simulation under Different Operating Conditions

Gong,

Chen,

Chen

et al. 2024

Energies

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High-voltage heat release from batteries can cause safety issues for electric vehicles. Relevant scientific research work is carried out in the laboratory. The battery safety of laboratory experiments should not be underestimated. In order to evaluate the safety performance of batteries in the laboratory testing of driving conditions of electric vehicles, this paper simulated and compared the discharge characteristics of two common batteries (lithium iron phosphate (LFP) battery and nickel–cobalt–manganese (NCM) ternary lithium battery) in three different operating conditions. The operating conditions are the NEDC (New European Driving Cycle), WLTP (World Light Vehicle Test Procedure) and CLTC-P (China light vehicle test cycle) for normal driving of electric vehicles. LFP batteries have a higher maximum voltage and lower minimum voltage under the same initial voltage conditions, with a maximum voltage difference variation of 11 V. The maximum current of WLTP is significantly higher than NEDC and CLTC-P operating conditions (>20 A). Low current discharge conditions should be emulated in teaching simulation and experiments for safety reasons. The simulation data showed that the LFP battery had good performance in maintaining the voltage plateau and discharge voltage stability, while the NCM battery had excellent energy density and long-term endurance.

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Section: Introductionmentioning

confidence: 99%

Study on Discharge Characteristic Performance of New Energy Electric Vehicle Batteries in Teaching Experiments of Safety Simulation under Different Operating Conditions

Gong,

Chen,

Chen

et al. 2024

Energies

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Performance study of fin structure in air-cooled thermal management system for column power battery

Han,

Wang,

Zhao

et al. 2024

Journal of Energy Storage

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Numerical Analysis of a Two-Layer PCM Based Battery Thermal Management System for Different Material Properties

Kavasoğulları

2024

Black Sea Journal of Engineering and Science

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The design and numerical analysis of the two-layer PCM (Phase Change Material)-based thermal management system for a 18650-type lithium-ion battery have been performed. In relation to simulation, the coefficient of thermal conductivity and melting temperature of the first layer of PCMs are varied. Other parameters are made identical to that of the next layer's parameters in order that the generation of two different layers of PCMs can be attained: PCM-1 and PCM-2. To obtain a more realistic approach in the numerical analysis, the battery thermal model was created in the COMSOL-MATLAB interface using the experimental internal resistance data obtained for 18650 type Li-ion batteries in the literature. While a cheaper and more accessible material with a thermal conductivity of 0.2 W/mK and a melting point of 50 °C was used in the PCM-2 layer, the thermal conductivity was changed to 0.2; 1 and 5 W/mK in the PCM-1 layer; and the melting point was changed to 30, 40 and 50 °C. In this way, for PCM layers with different thickness (tpcm), the system was optimized at two different discharge rates, 5C and 7C. As a result of the numerical analysis, it was determined that the optimum tpcm, kpcm,1 and Tm values for the 5C discharge rate were 2 mm, 0.2 W/mK and 40 °C, respectively; and the optimum tpcm, kpcm,1 and Tm values for the 7C discharge rate were 4 mm, 5 W/mK and 40 °C, respectively.

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Thermal hazard evaluation of 18650 lithium-ion batteries at various discharge rates

Cited by 3 publications

References 26 publications

Study on Discharge Characteristic Performance of New Energy Electric Vehicle Batteries in Teaching Experiments of Safety Simulation under Different Operating Conditions

Study on Discharge Characteristic Performance of New Energy Electric Vehicle Batteries in Teaching Experiments of Safety Simulation under Different Operating Conditions

Performance study of fin structure in air-cooled thermal management system for column power battery

Numerical Analysis of a Two-Layer PCM Based Battery Thermal Management System for Different Material Properties

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