Electrochemical thermal modeling and experimental measurements of 18650 cylindrical lithium-ion battery during discharge cycle for an EV

Panchal, Satyam; Mathew, Manoj; Fraser, Roydon; Fowler, Michael

doi:10.1016/j.applthermaleng.2018.02.046

Cited by 207 publications

(67 citation statements)

References 35 publications

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“…The LFP cell, which was initially at 0% SOC, was charged to 100% SOC and allowed to rest for an hour. The heat lost to the environment was measured during the resting period, and the measured temperature values were used to estimate the heat transfer coefficient using Equation (10). The results are provided in Figure 9.…”

Section: Cell Characterization Resultsmentioning

confidence: 99%

Development of an Electro-Thermal Model for Electric Vehicles Using a Design of Experiments Approach

et al. 2018

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An accurate and computationally efficient lithium-ion battery model is beneficial when developing state-of-charge (SOC) and state-of-health (SOH) algorithms for battery management systems (BMS). These models allow for software-in-the-loop (SIL) and hardware-in-the-loop (HIL) testing, where the battery pack is simulated in software. However, development of these battery models can be time-consuming, especially when trying to model the effects of temperature and SOC on the equivalent circuit model (ECM) parameters. Estimation of this relationship is often accomplished by carrying out many experiments, which can be costly and time consuming for BMS manufacturers. To address these issues, this paper makes two contributions to literature. First, a comprehensive battery model is developed, where the ECM parameter surface is generated using a design of experiments (DOE) approach. Second, replication runs are conducted to accurately estimate the measurement noise and determine which model parameters are significant. The technique is then compared with existing approaches from the literature, and it is shown that, by using the proposed method, the same degree of accuracy can be obtained while requiring significantly fewer experimental runs. This can be advantageous for BMS manufacturers that require a high-fidelity model but cannot afford to carry out many experiments.

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Section: Cell Characterization Resultsmentioning

confidence: 99%

Development of an Electro-Thermal Model for Electric Vehicles Using a Design of Experiments Approach

et al. 2018

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“…PHEVs combining an ICE with a grid-connected battery, allow the vehicles to be powered by both gasoline and electricity, and thus, potentially reduce gasoline usage and the emission of air pollution [22][23][24]. Offering more charging opportunities for PHEVs could help to promote the adoption and market and extend the charging-depleting (CD) range [25].…”

Section: Introductionmentioning

confidence: 99%

A Charging Location Choice Model for Plug-In Hybrid Electric Vehicle Users

Yun

Sun

Zhang³

et al. 2019

Sustainability

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Electric vehicles (EVs) are promising alternatives to replace traditional gasoline vehicles. The relationship between available charging stations and electric vehicles has to be precisely coordinated to facilitate the increasing promotion and usage of EVs. This paper aims to investigate the choice of the charging location with global positioning system (GPS) trajectories of 700 Plug-in Hybrid Electric Vehicle (PHEV) users as well as the charging facility data in Shanghai. First, the recharge accessibility of each PHEV user was investigated, and 9% rely solely on public charging networks. Then, we explored the relationship between fuel consumption and the average distance between charging to analyze the environmental benefits of PHEVs. It was found that 16% PHEVs are similar to EVs, and 9% whose drivers rely solely on public charging stations are similar to internal combustion engine (ICE) vehicles. PHEV users were divided into four types based on the actual recharge access: home and workplace-based user (private + workplace + public), the home-based user (private + public), the workplace-based user (workplace + public), and the public-based user (public). Models were developed to identify and compare the factors that influence PHEV user's charging location choices (home, workplace, and public stations). The modeling and results interpretation were carried out for all PHEV users, home and workplace-based users, home-based users, and workplace-based users, respectively. The estimation results demonstrated that PHEV users tended to charge at home or workplace rather than public charging stations. Charging price, charging price tariff, the initial state of charge (SOC), dwell time, charging power, the density and size of public charging stations, the total number of public charging, vehicle kilometer travel (VKT) of the current trip and current day are the main predictors when choosing the charging location. Findings of this study may provide new insights into the operational strategies of the public charging station as well as the deployment of public charging facilities in urban cities.Sustainability 2019, 11, 5761 2 of 23 electrification through considerable investments in consumer incentives, charging infrastructures as well as technology research and development [4,5]. In order to promote the usage and adoption of EVs, Shanghai had made great investments to subsidize EV consumers and manufacturers, offered free and specific license plate, built public charging stations, and offered purchasing tax deductions and exemptions and other non-monetary incentives (e.g., free usage restriction policy during peak hours) [6]. In 2016, the EV ownership in Shanghai has surpassed the 100,000, ranking the first in the world. By 2018, the number had increased to attain 239,000, accounting for 6% of the total vehicle ownership in Shanghai [7], in which percentages of BEV and PHEV were around 30% and 70%, respectively.One of the most pressing challenges is to deploy charging infrastructures in public locations considering the tra...

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“…25 Panchal et al studied the thermal performance and heat generation in the LIB cell, which was significant monitoring and management for the safety of electric vehicles. 26,27 Larsson et al studied the fire behaviors of seven kinds of commercial LIBs, and hydrogen fluoride (HF) gas was found for several batteries. HF emissions might cause severe toxic threat so that the risk assessment and management of battery is essential, especially large LIB pack.…”

Section: Discussionmentioning

confidence: 99%

“…Lecocq et al tested the heat release rate (HRR) and concentration of toxic gas product of 1.3 Ah LIB, which showed that the LIB fire characteristic parameters were highly dependent on lithium salt and SOC . Panchal et al studied the thermal performance and heat generation in the LIB cell, which was significant monitoring and management for the safety of electric vehicles . Larsson et al studied the fire behaviors of seven kinds of commercial LIBs, and hydrogen fluoride (HF) gas was found for several batteries.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the effect of ambient pressure on thermal runaway and fire behaviors of lithium‐ion batteries

et al. 2019

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Summary To investigate the impacts of ambient pressure on thermal runaway and fire behaviors of lithium‐ion battery (LIB), experimental measurement and theoretical analysis with serial conditions are conducted at two altitudes. The well‐designed experimental equipment and operating conditions have enabled the accurate evaluation of ambient pressure effects. Results show that the first abrupt temperature change in Hefei (ambient pressure 100.8 kPa) is higher than that in Lhasa (64.3 kPa). The difference in ambient pressure at two altitudes leads to different relief valve crack temperature and time. The average burning rate in Hefei is larger than that in Lhasa, and the estimated pressure effect factor is quite different for detailed pack conditions and varies within the range of 0.083‐1.39. The ambient pressure has a greater effect on the heat release rate and total heat release than the mass loss, and the effective combustion heat under the low pressure is lower than that in normal condition. This work can provide more comprehensive and useful data for the safety management of LIBs at low pressure environments.

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Electrochemical thermal modeling and experimental measurements of 18650 cylindrical lithium-ion battery during discharge cycle for an EV

Cited by 207 publications

References 35 publications

Development of an Electro-Thermal Model for Electric Vehicles Using a Design of Experiments Approach

Development of an Electro-Thermal Model for Electric Vehicles Using a Design of Experiments Approach

A Charging Location Choice Model for Plug-In Hybrid Electric Vehicle Users

Experimental investigation on the effect of ambient pressure on thermal runaway and fire behaviors of lithium‐ion batteries

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