batterySeparator

Separator object for battery P2D model

Since R2026a

Description

A batterySeparator object contains information about the properties of the battery separator, including the thickness, porosity, and Bruggeman's coefficient.

Creation

Syntax

separator = batterySeparator(PropertyName=Value)

Description

separator = batterySeparator(PropertyName=Value) creates a batterySeparator object and specifies the properties of the separator. For example, you can specify the thickness of the separator layer, its porosity, and Bruggeman's coefficient.

Properties

Thickness — Thickness of separator layer

positive number

Thickness of the separator layer in the battery, specified as a positive number. Battery P2D modeling uses SI units of measurements, so the thickness must be specified in meters (m).

Data Types: double

Porosity — Porosity of separator

positive number

Porosity of the separator, specified as a positive number. Porosity is the fraction of the volume within the separator that is void space, allowing for the movement of the electrolyte and ions.

Data Types: double

BruggemanCoefficient — Bruggeman's coefficient

positive number

Bruggeman's coefficient, specified as a positive number. Bruggeman's coefficient is a coefficient that relates the porosity of the material to its effective conductivity and diffusivity.

Data Types: double

Examples

Battery Pseudo-2D Model

Create a model for the battery P2D analysis.

model = batteryP2DModel

model = 
  batteryP2DModel with properties:

   Components
                   Anode: [1×1 batteryElectrode]
                 Cathode: [1×1 batteryElectrode]
               Separator: [1×1 batterySeparator]
             Electrolyte: [1×1 batteryElectrolyte]

   Configurations
       InitialConditions: [1×1 batteryInitialConditions]
             CyclingStep: [1×1 batteryCyclingStep]
           SolverOptions: [1×1 batterySolverOptions]

   Constants
         FaradayConstant: 96487
    UniversalGasConstant: 8.3140

You can specify the parameters of the anode, cathode, separator, electrolyte, initial conditions, cycling step, and so on by setting the properties of the model. For example, specify the properties of the electrolyte and the separator.

electrolyte = batteryElectrolyte(...
    DiffusionCoefficient=2E-10, ...
    TransferenceNumber=0.363, ...
    IonicConductivity=0.29);

separator = batterySeparator(...
    Thickness=25E-6, ...
    Porosity=0.45, ...
    BruggemanCoefficient=1.5);

model.Electrolyte = electrolyte;
model.Separator = separator;
model.Electrolyte

ans = 
  batteryElectrolyte with properties:

    DiffusionCoefficient: 2.0000e-10
      TransferenceNumber: 0.3630
       IonicConductivity: 0.2900

model.Separator

ans = 
  batterySeparator with properties:

               Thickness: 2.5000e-05
                Porosity: 0.4500
    BruggemanCoefficient: 1.5000

Alternatively, you can specify battery parameters when creating the model.

model2 = batteryP2DModel( ...
    Electrolyte=electrolyte, ...
    Separator=separator);

model2.Electrolyte

ans = 
  batteryElectrolyte with properties:

    DiffusionCoefficient: 2.0000e-10
      TransferenceNumber: 0.3630
       IonicConductivity: 0.2900

model2.Separator

ans = 
  batterySeparator with properties:

               Thickness: 2.5000e-05
                Porosity: 0.4500
    BruggemanCoefficient: 1.5000

Version History

Introduced in R2026a