Effect analysis on performance enhancement of a novel air cooling battery thermal management system with spoilers

Wang, Ningbo; Li, Congbo; Li, Wei; Huang, Mingli; Qi, Dongfeng

doi:10.1016/j.applthermaleng.2021.116932

Cited by 100 publications

(24 citation statements)

References 48 publications

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“…Thus, a lumped-parameter model or an equivalent circuit model (ECM) is more often used in the simulation of large-format battery modules. [30,31] In such models, the heats generated from a single cell are generally calculated either by using the empirical energy balance, as originally proposed by D. Bernardi et al, [32] or by using Ohm's law assuming the internal resistance as a fixed value or as a 1D variation (usually as a function of the state of charge, SOC). [33,34] However, considering that the battery behavior is also largely dependent on temperature and C-rate, the relevant battery physics may be oversimplified through the abovementioned approach.…”

Section: Doi: 101002/ente202101131mentioning

confidence: 99%

An Integrated Flow–Electric–Thermal Model for a Cylindrical Li‐Ion Battery Module with a Direct Liquid Cooling Strategy

et al. 2022

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Lithium-ion batteries (LiBs) are on their way to becoming a dominating energy storage technology, especially for application in electric vehicles, [1,2] due to their excellent performance in terms of combinations of energy density, power capability, energy efficiency, and cycle life. In recent decades, there have been plenty of investigations, both using experimental measurements [3][4][5] and simulations, [6][7][8][9] aiming to improve the safety, energy, and power of LiBs. This has led to a consensus that the performance of LiBs is largely dependent on their operational temperature, [10][11][12][13][14] explaining the growing interest in thermal control of LiBs, both at the cell and system level and to increased efforts in coupled thermal and electrochemical modeling of cell behavior. [15][16][17][18][19] However, most of the existing coupled thermal and electrochemical models are either built on the single-cell level, which is not applicable in the investigation of the effect of the battery module design. Alternatively, they are built based on the most simply operational air-cooling system. The aim of the present study is, therefore, to establish an integrated model at the battery module level, which can take into account the simultaneous and interdependent thermal behavior of different cells and the effects from relevant multi-physical fields caused by different cooling strategies, incorporating fluid flow and heat transfer across both fluid and solid domains.Since the thermal behavior of the batteries/module is determined by the balance between heat generation and dispassion rate, the first step to building a convincing integrated model is to understand the heat generation within the battery, i.e., to build a precise thermal model. The existing thermal models for LiBs can be classified into lumped-parameter models, [20] electric-thermal models, [6,21] electrochemical-thermal models, [22,23] and thermal runaway models. [24,25] Among these, the electrochemical-thermal model can provide the most detailed information on the battery physics, which makes it possible to extract heat generated from different components, [26] making it favorable from a battery design point of view. For example, Kim et al. discussed the impact of geometry and position of the tabs on the temperature gradient in an operated battery, [27] while Lee et al. [28] found that the heat

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Section: Doi: 101002/ente202101131mentioning

confidence: 99%

An Integrated Flow–Electric–Thermal Model for a Cylindrical Li‐Ion Battery Module with a Direct Liquid Cooling Strategy

et al. 2022

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“…They conducted a CFD coupled multi-objective optimization approach for an air cooling BTMS with spoilers. By applying a spoiler to the battery gap of the air-cooled BTMS, the airflow path was changed, effectively improving the temperature uniformity of the battery module, and the difference in cooling performance was investigated according to the shape, number, and length of the spoiler (Wang et al, 2021). In the study of applying the air cooling method in the battery thermal management system, the application to the change of the battery electrical performance according to the environmental temperature by focusing only on the cooling performance of the battery is insufficient.…”

Section: Introductionmentioning

confidence: 99%

Correlation Between Changes in Environmental Temperature and Performance of High-Discharge Lithium-Polymer Batteries

Choi

Park

2022

Front. Energy Res.

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Electric vehicles (EVs) have been developed to solve environmental problems and the depletion of energy resources, and batteries have been used as their main energy source. The battery used in this study was a lithium polymer battery with the same chemical structure as lithium-ion. The use of a solid electrolyte has advantages, such as lack of leakage of electrolyte, high density per size, and convenient shape design. In this study, we analyzed the heat generation and performance characteristics of EV batteries through experiments on changes in environmental temperature. There is a difference in the heat generation depending on the discharge rate, and the performance characteristics of the battery improves as the environmental temperature rises. In the experiment, the battery discharge performance and heat generation were meaningful at 40°C environmental temperature, the worst battery discharge performance and heat generation at −30°C environmental temperature were 25.1 W (1 C), 81.0 W (2 C), and 151.5 W (3 C). In this study, the heat generation and performance characteristics of the battery were analyzed according to the change in the environmental temperature and discharge rate of the battery. We proposed a relationship between heat generation and environmental temperature in terms of discharge rate. The relationship is significant in designing thermal management system for battery powered devices.

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“…18 Only few articles have focused on enhancing the convective heat transfer efficiency of air-cooled BTMS. For instance, Wang et al 19 proposed the installation of spoilers in the battery gap spacing as a method for the improvement of heat dissipation performance of an air cooling-based BTMS. The influence of the geometrical parameters of the spoiler on the battery pack's thermal behavior were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer augmentation of lithium‐ion battery packs by incorporating an interrupted fin arrangement

Jishnu

Garg

et al. 2022

Intl J of Energy Research

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Summary The performance, lifetime, and safety of electric vehicles (EVs) are highly reliant on the battery's capacity and temperature. Battery thermal management system (BTMS) involves techniques to control the battery's thermal behavior by maintaining temperature and temperature uniformity within an optimal range. Air cooling BTMS is frequently used in EVs due to its design simplicity and cost‐effectiveness. Only limited works have utilized passive convective heat transfer enhancement strategies for air‐cooled BTMS, especially fin‐based structures for cylindrical lithium‐ion battery packs. Present work introduces a novel design by incorporating the interrupted fins into a conventionally air‐cooled BTMS. The proposed design offers superior heat transfer efficiency as well as ease of manufacturing when compared to the existent herringbone fin design used in prior air‐cooled BTMS literature. Results indicate that the average temperature of the cells and maximum temperature difference were reduced by 5.646 and 7.958 K, respectively, by incorporating an optimal uniform interrupted fin arrangement. The average temperature of the cells was reduced by 0.479 K when the interrupted fins were added to increase the area, compared to 0.088 K for an equivalent area enhancement in a conventional fin. The uniform interrupted fin improved the temperature uniformity by 5.05%, but the area enhanced conventional fin deteriorated it by 1.59%. The non‐uniform interrupted fin arrangement, resulted in an improvement of 4.47%, over uniform interrupted fins, in the battery pack's temperature uniformity.

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Effect analysis on performance enhancement of a novel air cooling battery thermal management system with spoilers

Cited by 100 publications

References 48 publications

An Integrated Flow–Electric–Thermal Model for a Cylindrical Li‐Ion Battery Module with a Direct Liquid Cooling Strategy

An Integrated Flow–Electric–Thermal Model for a Cylindrical Li‐Ion Battery Module with a Direct Liquid Cooling Strategy

Correlation Between Changes in Environmental Temperature and Performance of High-Discharge Lithium-Polymer Batteries

Heat transfer augmentation of lithium‐ion battery packs by incorporating an interrupted fin arrangement

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