Whats wrong
Can anyone check where is wrong with my model? I want to learn the stationary current distribution in a battery.
View ArticleThe combination of Lithium Ion battery module and Mechanics Solids Modules
I set up a 2D model for lithium ion battery. I use Mechanics solids to get the strain. Then I use strain to change D; diffusion coefficient by Dp=D0*exp(abs(solid.ep1)/0.001). Then I put Dp into...
View ArticleCurrent Source and violation of Maxwell-Ampère’s law
Hi, I have setup a model using both Electric Currents and distributed ODE and PDE interfaces using a simple 2D square geometry. One boundary of the geometry is set as ground and another used to apply...
View ArticleError on simulating Lithium-Ion tutorial
Hello, i was trying to do the tutorial of simulating a 2D lithium-Ion battery (www.comsol.com/showroom/gallery/9981/), b ut when i try to execute my simulation i get the following errors: Failed to...
View ArticleFailed to evaluate variable Jacobian
Hi, I'm trying to implement Lithium-ion battery 2D tutorial on a 3D structure. I followed all steps but COMSOL gives me this error: Failed to evaluate variable Jacobian. - Variable:...
View ArticleLi 1D battery simulation-time varying current loads
I have a time varying current load signal from a motor (simulink) that I would like to apply to my battery simulation. I am fairly new to Comsol but have built the 1D model example as a trial, but is...
View ArticleInitial Value problem. Please help
Hi all, I am trying to simulate the vanadium ion crossover for a vanadium redox flow battery. However, there seems to be a initial value inconsistency that is preventing me from solving the model. I am...
View ArticleSmoothing battery current changes
I've been having issues with the capacity fade model and I think I may have narrowed down the problem. See the model in question here: www.comsol.com/model/capacity-fade-of-a-li-ion-battery-12667 I am...
View ArticlePEM-FC, COMSOL
Hi, i have a question in my heat and mass transfer book and i want to do it on COMSOL, but iam still new on COMSOL, so can anyone tell me the steps that i should go through inorder to do the question...
View ArticleModeling LiIon Battery Load Cycles
I've been working with the lithium ion battery module quite a bit, and I keep running into the same problems - load cycle discontinuities are making the solver spit out errors left and right. I've...
View ArticleButler-Volmer kinetics
As an electrochemist I cannot understand the formulation of the equation of the electrode reaction kinetics (attached). Why is there (n - eta) in the first exponent, instead of 1- eta? The formulation...
View ArticleModeling the Lithium Ion Battery
Hello, I am working on modeling a lithium-ion battery based on the Kandler paper attached here. I have successfully inputted the governing equations into COMSOL with one exception: the boundary...
View Article3D prismatic Li_ion battery simulation
Hi, I am using COMSOL 4.4 and I am trying to simulate a prismatic Li- ion battery. I have some questions a bout the geometry and heat transfer in my 3D simulation. Is there somebody who can kindly help...
View ArticleHow to add two materials in one Geometry
With Respect; I am working on a project, and want to add two to three materials, in one geometry.... Can toy tell me, how to do so? Thanks. -- Danish
View ArticleWhats wrong
Can anyone check where is wrong with my model? I want to learn the stationary current distribution in a battery.
View ArticleThe combination of Lithium Ion battery module and Mechanics Solids Modules
I set up a 2D model for lithium ion battery. I use Mechanics solids to get the strain. Then I use strain to change D; diffusion coefficient by Dp=D0*exp(abs(solid.ep1)/0.001). Then I put Dp into...
View ArticleCOMSOL version 4.4 floating potential boundary condition missing
Hi I'm running an electric currents physics study and I want to apply a floating potential boundary condition. The version 4.3 manual says it exists but I can't find it in version 4.4. What's going on?...
View ArticleCurrent Source and Violation of Current Conservation
Hi I'm using the electric currents interface. My model uses the "current source" feature and the solution COMSOL gives clearly violates current conservation. Has anyone else experienced this? And does...
View ArticleStop condition function of solver configurations
Can anyone tell me what stop condition is (in Solver configurations> Solution 1> Time-Dependent solver 1> Stop condition)? and why it is not precise! I checked the Single Particle Model of a...
View ArticleStationary Study and Time Dependent Study of Same Model Disagree
Hi, I'm running an electric currents interface for a dielectric board with a couple ground points and a constant current source within the dielectric. I'm interested in the transient solution to this...
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