An air-cooled system with a control strategy for efficient battery thermal management

Chen, Kai; Zhang, Zhenli; Wu, Bingheng; Song, Mengxuan; Wu, Xiaoling

doi:10.1016/j.applthermaleng.2023.121578

Cited by 45 publications

(2 citation statements)

References 28 publications

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“…A previous study [36] indicated that the results of two-dimensional (2D) calculations for parallel air-cooled BTMSs were in good consistency with those of the three-dimensional systems. Different grid numbers were considered and a grid dependence analysis was carried out.…”

Section: Btmsmentioning

confidence: 84%

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Efficient Design of Battery Thermal Management Systems for Improving Cooling Performance and Reducing Pressure Drop

Chen,

Yang,

Chen

et al. 2024

Energies

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The air-cooled system is one of the most widely used battery thermal management systems (BTMSs) for the safety of electric vehicles. In this study, an efficient design of air-cooled BTMSs is proposed for improving cooling performance and reducing pressure drop. Combining with a numerical calculation method, a strategy with a varied step length of adjustments (∆d) is developed to optimize the spacing distribution among battery cells for temperature uniformity improvement. The optimization results indicate that the developed strategy reduces the optimization time by about 50% compared with a strategy using identical ∆d values while maintaining good performance of the optimized system. Furthermore, the system’s pressure drop does not increase after the spacing optimization. Based on this characteristic, a structural design strategy is proposed to improve the cooling performance and reduce the pressure drop simultaneously. First, the appropriate flow pattern is arranged and the secondary outlet is added to reduce the pressure drop of the system. The results show that the BTMS with U-type flow combined with a secondary outlet against the original outlet can effectively reduce the pressure drop of the system. Subsequently, this BTMS is further improved using the developed cell spacing optimization strategy with varied ∆d values while the pressure drop is fixed. It is found that the final optimized BTMS achieves a battery temperature difference below 1 K for different inlet airflow rates, with the pressure drop being reduced by at least 45% compared with the BTMS before the optimization.

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Section: Btmsmentioning

confidence: 84%

“…A previous study [36] indicated that a BTMS with a U-type flow (denoted as BTMS U) achieved a smaller pressure drop than BTMS Z. In this section, the proposed strategy with varied ∆d values is used to design the cell spacing distribution of BTMS U.…”

Section: Improvement Through Changing the Flow Patternmentioning

confidence: 99%

Efficient Design of Battery Thermal Management Systems for Improving Cooling Performance and Reducing Pressure Drop

Chen,

Yang,

Chen

et al. 2024

Energies

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Effects of air inlet and outlet on thermal management of electric vehicle battery pack equipped with fins

Yu,

Zhang,

et al. 2024

Asia-Pacific J Chem Eng

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To solve the high heat dissipation problem of lithium ion battery, the air‐cooled heat dissipation with fins is adopted for the thermal management. Heat dissipation characteristics of two types of air inlets and outlets (single air inlet and outlet, and double air inlet and outlet) and two types of surfaces (smooth and fin structure) were simulated and compared. When the air inlet and outlet are single inlet and single outlet, compared with smooth battery packs, finned construction packs can increase the Nusselt number by 24.9%. When the air inlet and outlet are double inlet and double outlet, compared with smooth battery packs, finned construction packs can increase the Nusselt number by 13.3%. The double‐air inlet and outlet battery pack can significantly reduce the average temperature of the battery pack compared with the single‐air inlet and outlet battery pack. Compared with the single‐inlet and single‐outlet solar smooth battery pack, it can increase the Nu by 131.6%, and the comprehensive performance index can reach 1.66.

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Performance enhancement for a novel cylindrical system Li‐ion battery with MXene‐based dielectric fluid for immersion cooling

Singh,

Sahoo

2024

Heat Trans

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This research looks at the impact of dielectric fluids and fluid speeds on cell temperature control in innovative cylindrical lithium‐ion batteries during high‐rate discharges (C‐rate) using the multiscale multidomain battery model. The goal is to improve the battery thermal management system to increase battery performance, longevity, and safety. The present study includes reducing thermal strains, enhancing efficacy, and forestalling overheating risks across various applications in electrified systems. The assessment focuses on four dielectric fluids—ester, mineral, kerosene, and Novec 7200—flowing at 0.01 m/s to gauge their efficiency in managing cell temperatures. Results demonstrate the criticality of effective thermal management in maintaining optimal battery performance and longevity. Ester oil emerges as the most efficient coolant, maintaining cell temperatures at 305.84 K and showcasing a 44% reduction compared with scenarios without coolant. In contrast, kerosene oil, mineral oil, and Novec 7200 yield temperature reductions of 42.86%, 42.51%, and 43.11%, respectively. Furthermore, combining 1% v/v. MXene nanoparticles with ester oil enhance cooling capabilities, with remarkable cell temperature reductions of 50% at 0.01 m/s velocity. Subsequent increments in flow velocity lead to enhanced cooling effects: at 0.05 and 0.1 m/s, reductions reach 51.89% and 52.155%, escalating to 52.58% and 54% at 0.5 and 1.0 m/s, correspondingly.

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An air-cooled system with a control strategy for efficient battery thermal management

Cited by 45 publications

References 28 publications

Efficient Design of Battery Thermal Management Systems for Improving Cooling Performance and Reducing Pressure Drop

Efficient Design of Battery Thermal Management Systems for Improving Cooling Performance and Reducing Pressure Drop

Effects of air inlet and outlet on thermal management of electric vehicle battery pack equipped with fins

Performance enhancement for a novel cylindrical system Li‐ion battery with MXene‐based dielectric fluid for immersion cooling

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