As part of the US Department of Energyís (DOE) CAEBAT (Computer Aided Engineering for Batteries) activities (earlier post), scientists at Oak Ridge National Laboratory (ORNL) have developed a flexible, robust, and computationally scalable open-architecture framework that integrates multi-physics and multi-scale battery models.
The Virtual Integrated Battery Environment (VIBE) allows researchers to test lithium-ion batteries under different simulated scenarios before the batteries are built and used in electric vehicles. The physics phenomena of interest include charge and thermal transport; electrochemical reactions; and mechanical stresses. They operate and interact across the porous 3D structure of the electrodes (cathodes and anodes); the solid or liquid electrolyte system; and the other battery components. VIBE was developed by researchers in ORNLís Computational Engineering & Energy Sciences group, led by Dr. John Turner.
The objective of CAEBAT is to incorporate existing and new models into design suites/tools with the goal of shortening design cycles and optimizing batteries (cells and packs) for improved performance, safety, long life, and low cost.
VIBE brings together the infrastructure pieces: OAS (Open Architecture Software), which provides a Python-based computational infrastructure for interaction and orchestration between the various components; BatML, an XML standard for battery inputs along with translators to other formats; Battery State, a standard for the state file to exchange information between the components; and ICE, the Integrated Computational Environment to provide an user environment to simplify the workflow of modeling and visualizing batteries.
VIBE allows systematically test models sequentially starting from cell-sandwich, building cells, combine cells to form modules, and integrate modules into a pack. The simulations can be spawned across multiple processors to reduce wall-clock time. Click to enlarge.
VIBE allows systematically test models sequentially starting from cell-sandwich, building cells, combine cells to form modules, and integrate modules into a pack. The simulations can be spawned across multiple processors to reduce wall-clock time.
DOE started the CAEBAT program in 2010 (earlier post), and ORNL had a limited release of the software in 2012. The 2014 release includes many enhancements in both physics capabilities and usability.
The latest software package includes an easy-to-use configuration, setup, launch and post-processing feature, standardized input and information exchange between physics components, and a unique tool for performing coupled electrochemical-electrical-thermal simulations known as Advanced MultiPhysics for Electrochemical and Renewable Energy Storage (AMPERES).
A large computing resource is not necessary to run the software, although it depends on the complexity of the problem. Additionally, the software is designed so the user can submit a large parametric sweep or optimization case to run overnight, eliminating the need to wrestle for primetime computer hours and allowing users to concentrate on data analysis and problem set-up during the day.
Together, these features help users analyze the effects of their specific lithium-ion battery design requirements and develop increasingly affordable, safer batteries with longer life and higher performance.
VIBE can be downloaded from the CAEBAT website, and ORNL researchers are available for user outreach and support to build this community capability.
Additional members of the multidisciplinary development group are ORNLís Computer Science and Mathematics Divisionís Srikanth Allu, Andrew Bennet, Jay Billings, Wael Elwasif, Sergiy Kalnaus, Abhishek Kumar, Damien Lebrun-Grandie, Alex McCaskey, Srdjan Simunovic and Stuart Slattery.
ORNL partners on CAEBAT are ANSYS, CD-adapco, EC Power and the National Renewable Energy Laboratory. The Office of Energy Efficiency and Renewable Energy provides funding for the research.
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