Thermal Analysis of a Dynamic Lithium-Ion Battery during Charge

Four types of heat sources of a dynamic lithium-ion battery (LIB) during charge were studied, and temperature distributions inside the dynamic LIB caused by the four kinds of heat generation sources with different currents and temperatures during charge were simulated by using a electrochemical-thermal three-dimensional model. The ohmic heat is the largest heat resource with about 63.5% in the total heat generation during regular charge, the electrochemical reaction heat is dominant when the SOC is below around 10%, and the subsidiary reaction heat can not be ignored when the temperature in the battery is above 80°C. Current as well as ambient temperature plays a very important role in the overall thermal behaviors of the battery.

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Three-Dimensional Model Based Numerical Investigation on the Distributed Characteristics of Lithium-Ion Batteries

ECS Meeting Abstracts ◽

10.1149/ma2014-03/4/511 ◽

2014 ◽

Keyword(s):

Lithium Ion Batteries ◽

Numerical Investigation ◽

Three Dimensional ◽

Lithium Ion ◽

Dimensional Model ◽

Three Dimensional Model ◽

Model Based

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Conjugate natural convection from an array of discrete heat sources: Part 1 — Two- and three-dimensional model validation

Fuel and Energy Abstracts ◽

10.1016/0140-6701(96)89272-1 ◽

1996 ◽

Vol 37 (3) ◽

pp. 231

Author(s):

T.J. Heindel

Keyword(s):

Natural Convection ◽

Model Validation ◽

Three Dimensional ◽

Heat Sources ◽

Dimensional Model ◽

Three Dimensional Model ◽

Conjugate Natural Convection ◽

Discrete Heat Sources

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Simulation of Thermal Behaviour of a Lithium Titanate Oxide Battery

Energies ◽

10.3390/en12040679 ◽

2019 ◽

Vol 12 (4) ◽

pp. 679 ◽

Cited By ~ 6

Author(s):

Seyed Madani ◽

Erik Schaltz ◽

Søren Knudsen Kær

Keyword(s):

Heat Generation ◽

Electrochemical Behaviour ◽

Three Dimensional ◽

Lithium Ion ◽

Lithium Titanate ◽

Test System ◽

Three Dimensional Model ◽

Battery Cell ◽

Cell Parameters ◽

Lithium Titanate Oxide

One of the reasonable possibilities to investigate the battery behaviour under various temperature and current conditions is the development of a model of the lithium-ion batteries and then by employing the simulation technique to anticipate their behaviour. This method not only can save time but also they can predict the behaviour of the batteries through simulation. In this investigation, a three-dimensional model is developed to simulate thermal and electrochemical behaviour of a 13Ah lithium-ion battery. In addition, the temperature dependency of the battery cell parameters was considered in the model in order to investigate the influence of temperature on various parameters such as heat generation during battery cell operation. Maccor automated test system and isothermal battery calorimeter were used as experimental setup to validate the thermal model, which was able to predict the heat generation rate and temperature at different positions of the battery. The three-dimensional temperature distributions which were achieved from the modelling and experiment were in well agreement with each other throughout the entire of discharge cycling at different environmental temperatures and discharge rates.

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Geometrically-Accurate-Three-Dimensional Simulations of a Used Nuclear Fuel Canister Filled With Helium

Volume 7: Operations, Applications and Components ◽

10.1115/pvp2015-45851 ◽

2015 ◽

Cited By ~ 1

Author(s):

Triton Manzo ◽

Mustafa-Hadj Nacer ◽

Miles Greiner

Keyword(s):

Heat Transfer ◽

Natural Convection ◽

Nuclear Fuel ◽

Heat Generation ◽

Three Dimensional ◽

Two Dimensional ◽

Dimensional Model ◽

Three Dimensional Model ◽

Ansys Fluent ◽

Model Simulations

This paper presents preliminary results of heat transfer simulations performed in geometrically-accurate-three-dimensional model of nuclear fuel canister filled with helium. The numerical model represents a vertical canister, which relies on natural convection as its primary heat transfer mechanism, containing 24 PWR fuel assemblies. The model includes distinct regions for the fuel pellets, cladding and gas regions within each basket opening. Symmetry boundary conditions are employed so that only one-eighth of the package cross-section is included. The canister is assumed to be filled with helium at atmospheric pressure. A constant temperature of 101.7°C is employed on the canister outer surfaces, assuming the canister to be surrounded with water. These conditions of pressure and temperature were considered, in this paper, for comparison purpose with previous work. The effects of buoyancy-induced gas motion and natural convection, along with radiation and conduction through gas regions and solid are considered. Steady state simulations using ANSYS/Fluent were performed for different heat generation rates in the fuel regions. Simulations that include the effect of natural convection and others that do not include this effect are conducted. The peak cladding temperature and its radial and axial locations are reported. The maximum allowable heat generation that brings the cladding temperatures to the radial hydride formation limit (TRH=400°C) is also reported. The results of the three dimensional model simulations were compared to two dimensional model simulations for the same heat generation rate. The results showed that the two-dimensional simulations overestimate the temperature in the canister by almost 70°C.

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