Abaqus can solve the following types of electrochemical analyses:
- Coupled thermal-electrochemical analysis
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The coupled thermal-electrochemical procedure is intended for the analysis of
battery electrochemistry applications that require solving simultaneously
for temperature, electric potential in the solid electrode, electric
potential in the electrolyte, concentration of ions in the electrolyte, and
concentration in the solid particles used in the electrodes. In this
procedure, the different fields are solved without any knowledge about the
stress/deformation states. For more information, see Coupled Thermal-Electrochemical Analysis.
- Fully coupled thermal-electrochemical-structural analysis
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The fully coupled thermal-electrochemical-structural procedure is used to
simultaneously solve for displacements, temperature, electric potential in
the solid electrode, electric potential in the electrolyte, concentration of
ions in the electrolyte, and concentration in the solid particles used in
the electrodes. In this procedure, the thermal field and mechanical fields
can affect each other. In addition, the concentration in the solid particles
used in the electrodes can affect the mechanical fields through eigenstrains
caused by particle swelling during the charge/discharge cycle in the
battery. For more information, see Fully Coupled Thermal-Electrochemical-Structural Analysis.
- Fully coupled thermal-electrochemical-structural–pore pressure
analysis
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The fully coupled thermal-electrochemical-structural–pore pressure procedure
is used to simultaneously solve for displacements, pore fluid pressure that
governs electrolyte flow, temperature, electric potential in the solid
electrode, electric potential in the electrolyte, concentration of ions in
the electrolyte, and concentration in the solid particles used in the
electrodes. In this procedure, the thermal field and mechanical fields can
affect each other. In addition, the concentration in the solid particles
used in the electrodes can affect the mechanical fields through eigenstrains
caused by particle swelling during the charge/discharge cycle in the
battery. The fluid pressure and flow velocities in the electrolyte can be
affected by the mechanical fields, gravity, and particle swelling during the
charge/discharge cycle in the battery. For more information, see Fully Coupled Thermal-Electrochemical-Structural–Pore Pressure Analysis.
In addition to the procedures mentioned above to model porous electrodes, you can also
model the following:
- Solid electrodes in batteries
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Solid particles are not modeled explicitly for a solid electrode. Instead,
you define the electrochemistry on the interface between the solid electrode
and the porous separator using surface-based loads or surface-based
interactions. This approach results in a computationally efficient solution.
You can use any of the procedures listed above to model solid electrodes. For
more information, see Modeling Solid Electrodes in Lithium Metal Batteries.
- Aging in lithium ion batteries
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A rechargeable lithium ion battery undergoes different degradation mechanisms
that result in reduced capacity over time. The different aging mechanisms in
rechargeable lithium ion batteries such as Solid Electrolyte Interface (SEI)
layer growth, lithium plating, clogging of pores, and other phenomena can be
modeled.
You can use any of the procedures listed above to model aging in lithium ion
batteries. For more information, see Modeling Aging in Batteries.
- Solid electrolyte and solid state batteries
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Solid state batteries utilize a solid electrolyte, which also acts as a
separator. The anode and cathode are solid electrodes with diffusion of
species modeled at the cathode. Microscale simulations are not performed in
a solid state battery. The interface between the solid electrolyte and the
anode or cathode is modeled using surface-based loads or surface-based
interactions.
You can use coupled thermal-electrochemical analysis and fully coupled
thermal-electrochemical-structural analysis to model solid electrolyte and
solid state batteries. For more information, see Modeling Solid Electrolytes and Solid-State Batteries.
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